disposable absorbent article with profiled absorbent core

专利摘要:
DISPOSABLE ABSORBENT ARTICLE WITH PROFILED ABSORBENT CORE A disposable absorbent article has a central body that defines a first waist end that includes a first end edge, a second waist end region spaced longitudinally from the first waist end region and including a second edge of the end, and a groin region positioned between them. An absorbent core is located between the edges of the end, and includes a plurality of elastics incorporated therewith so that the core is substantially laterally contracted in the narrowed region around the elastics. The absorbent core includes at least one end region that is substantially inelastic and that has a substantially wider side width than that of the narrowed region.
公开号:BR112012010226B1
申请号:R112012010226-5
申请日:2010-10-28
公开日:2021-01-05
发明作者:Patrick King Yu Tsang；Andrew C. Wright；Anne Smid；Eugenio Go Varona
申请人:Dsg Technology Holdings Ltd；
IPC主号:

专利说明:

BACKGROUND OF THE INVENTION
This application claims the benefit of the filing date of American Provisional Application Serial No. 61 / 279,923, filed on October 28, 2009 (now pending) (which is hereby incorporated by reference for all purposes and made part of the present disclosure).
An advantageous application of the various concepts and modalities of the present invention is one aimed at baby diapers. For this reason, most of the example descriptions provided here are directed to diapers. The invention obviously extends to applications beyond diapers.
Most of the absorbent articles used today as baby diapers have a similar configuration to the absorbent article 10 illustrated in figures IA and 1B. The conventional absorbent article 10 is shown in a flat open position in figure 1A, and in cross-sectional view in figure 1B. This absorbent article 10 includes an outer fluid-impermeable back sheet 101, a body-permeable fluid-permeable cover material or top sheet 102, and an absorbent construction 110 positioned between the back sheet 101 and the top sheet 102 An absorbent core 103 provides the primary component of absorbent construction 110 and is shaped and positioned to receive and retain body fluids. Absorbent construction 110 may also include at least one fluid management layer, fluid distribution and / or wave layer 104.
As shown in Figure 1A, the backsheet 101 and the backsheet 102 together form or define a chassis or central body 105 of the absorbent article 10. The central body 105 can be described as having a first longitudinal end edge 112a, a second longitudinal end edge 112b and a longitudinal center line YY extending through the central body 111, forking both the first and second edges of the end 112a, 112b. The left and side margins 106a, 106b extend from one edge of the end 112a to the other edge of the end 112b. Each end edge 112a, 112b partially defines the waist regions 113a, 113b of the central body 105, which are generally characterized as having a side width significantly greater than a side width of a central region or groin region 114 of the central body 105 The waist regions 113a, 113b are shaped to allow the absorbent article 10 to be placed around the user's waist. In this regard, the first and second waist regions 113a, 113b can be described as anterior and posterior waist regions 113a and 113b, respectively. The conventional absorbent article 10 further includes a fixing means 104 attached to each side of the posterior waist region 113a. The fastening means 104 are extensible and thus extendable to a corresponding side of the front waist region 113b. The securing means 104 helps to retain the article 10 around and on the user's body. Absorbent article 10 also includes a means for stretching 107 article 10 to maintain closure and sealing around the user's legs. Stretching means 1057 (for example, leg hems and / or leg cutters) are necessarily positioned on the outside of and along the edges of the longitudinal side 106 of the absorbent construction 110. Referring to Figure IA , the conventional absorbent core 110 is centrally positioned in and around groin region 114 of absorbent article 10.
Currently, most diaper cores are made of mixtures of fibers and superabsorbent particles, specifically cellulose-based fibers derived from wood pulp and superabsorbent particles (SAP) derived from polyacrylic acid derivatives. An absorbent composite that is particularly suitable for application to or with the disposable absorbent articles introduced herein is described in U.S. Patent No. 6,540,853. Absorbent SAP-nonwoven composites of the type described in this patent reference are available for the roll-diaper manufacturing process and allow much greater freedom for the modeling of absorbent cores. However, due to the fact that superabsorbent fluffy pulp cores are generally supplied as a continuous stream or network of absorbent material, the simplest and cheapest processes require that the absorbent core be kept in a generally rectangular shape.
These cores are typically formed into rectangular shapes that are shaped for incorporation into an absorbent article. The shape of the core, particularly its width, is maintained in dimensions that accommodate placement within a diaper corresponding to the user's groin area. In addition, it is preferred in many applications that the absorbent core has an hourglass-like shape. Such diaper cores are known in the art as providing a narrower groin region that presents a better fit and comfort for the user. The hourglass shape also provides wider regions at the longitudinal ends of the core, which increases the absorption capacity and control of diaper leakage in those regions above the central groin region.
Figure 1C illustrates another disposable absorbent article of the prior art 10 '. The absorbent article 10 'uses a design in which an absorbent core 110' is reduced in width in the groin region 114 ', but is wider in the anterior and posterior waist portions 113a', 113b '. The result is an absorbent core 110 'which has a more pronounced hourglass shape. To obtain this desired hourglass-shaped core, a section of rectangular absorbent core is cut from a continuous network of absorbent material and additionally shaped, especially in the formation of the narrow central region.
As is known in the art, the preferred diaper assembly process is a process directed at a substantially linear and efficient machine that produces a large volume of packaged products. Because of the nature of the consumer product as a very frequently used disposable item and the abundance of competing products and alternative products (for example, reusable cloth diapers), it is imperative to keep the final product low cost. Therefore, it is also imperative to control the complexity of the manufacturing process and to minimize steps and material waste. This represents a technical challenge for an attempt to create alternative formats and features in the conventional disposable absorbent article. For example, although an hourglass-shaped diaper core is generally desirable or, in some applications, a core that has distinct areas of absorbency, additional cut or formation shapes or higher material cost can make the alternative model less effective.
In any case, absorbent core configurations that obtain additional functionality and / or improved comfort fit are certainly desirable. Care must be taken, however, to minimize material cost and manufacturing complexity. SUMMARY OF THE INVENTION
The present invention is particularly directed towards achieving absorbent core configurations that easily accommodate the conventional disposable absorbent article and maintain comfort and fit for the user. Such absorbent core configurations, and disposable absorbent articles that use the same, are readily made with a high volume without overloading the manufacturing process with additional steps and material waste. In this regard, the invention provides improved hourglass or nearly hourglass-shaped core constructions by providing and presenting more usable and flexible core components or core elements and incorporating these components into highly effective diapers, training pants and the like.
In one aspect, a disposable absorbent article is provided that has a central body defining a first waist end region including a first longitudinal end edge, a second waist end region spaced longitudinally from the first waist end region and including a second longitudinal end edge, and includes a first core element formed of materials that impart absorbent properties and a second core element formed of materials that impart absorbent properties. The second core element partially overlaps the first core element to form a primary multilayer absorbent region of the absorbent core.
In another aspect, a disposable absorbent article is provided that has a central body defining a first waist end region including a first end edge, a second waist end region spaced longitudinally from the first waist end region and including a second edge of the end, and a groin region positioned between them. The absorbent core is located between the edges of the ends, and includes a plurality of elastics incorporated therewith, such that the core is substantially laterally contracted in a narrowed region around the elastics. The absorbent core includes at least one end region that is substantially inelastic, and at least one end region has a substantially wider side width than a side width of the narrowed region.
These exemplifying aspects and other aspects of the invention are illustrated through figures 1 to 14 and / or the Detailed Description provided below. BRIEF DESCRIPTION OF THE DRAWINGS
Figure IA is an illustration of the plane view
simplified form of a prior art disposable absorbent article having an absorbent core;
Figure 1B is a simplified cross-sectional illustration of a disposable prior art absorbent article 10 of the type shown in Figure IA;
Figure 1C is a simplified plan view of another disposable prior art absorbent article;
Figure 2A is a simplified plan view of a disposable absorbent article, with a partial section showing an absorbent core, in accordance with the present invention;
Figure 2B is a perspective view illustration 20 of the disposable absorbent article in Figure 2A;
Figure 2C is an isolated plan view of the absorbent core in the disposable absorbent article in Figure 2A;
Figure 2D is a cross-sectional view showing a longitudinal absorbent profile of the absorbent article 25 in Figure 2A;
Figure 2E is a cross-sectional view showing a lateral absorbent profile of the absorbent article in Figure 2A, through lines 2E - 2E;
Figure 3A is a simplified plan illustration of 30 plus another embodiment of a disposable absorbent article according to the present invention;
Figure 3B is an isolated perspective view of the absorbent core in the disposable absorbent article in Figure 3A;
Figure 4A is a simplified plan illustration of an absorbent core according to yet another embodiment of the present invention;
Figure 4B is a perspective view of the absorbent core in Figure 4 A;
Figure 5A is a simplified plan illustration of an absorbent core according to yet another embodiment of the present invention;
Figure 5B is a simplified plan illustration of a disposable absorbent article using an absorbent core, in accordance with yet another embodiment of the present invention;
Figure 6A is a simplified illustration of an absorbent core according to yet another embodiment of the present invention, in a pre-tensioned state;
Figure 6B is a simplified illustration of the absorbent core in Figure 6A in a relaxed or contracted state;
Figure 6C is a simplified plan illustration of a disposable absorbent article, including a pair of absorbent cores in Figure 6A, in accordance with the present invention;
Figure 6D is a simplified cross-sectional view of the disposable absorbent article in Figure 6C through line 6D - 6D;
Figure 6E is a simplified plan illustration of a variation of the absorbent core in Figure 6A;
Figure 6F is an isolated perspective view of an absorbent core using a pair of the absorbent core elements in Figure 6E;
Figure 7A is an illustration of the simplified plan of an alternative absorbent core according to the present invention, shown in a tensioned state;
Figure 7B is a further illustration of the absorbent core in Figure 7A in a relaxed or contracted state;
Figure 7C is a simplified illustration of a variation of the absorbent core in Figure 7A, in a tensioned state, according to the present invention;
Figure 7D is an illustration of the absorbent core in Figure 7C in a relaxed or contracted state;
Figure 8A is a simplified perspective view of a stretched absorbent core, shown in a tensioned state, according to the present invention;
Figure 8B is an exploded view of the absorbent core in Figure 8A;
Figure 8C is a simplified perspective view of the absorbent core in Figure 8A, shown in a relaxed or contracted state, according to the present invention;
Figure 8D is a simplified perspective view of an alternative stretched absorbent core according to the present invention;
Figure 8E is an exploded view of yet another variation of a stretched absorbent core, in accordance with the present invention;
Figure 9A is a perspective illustration of a stretched absorbent core, in accordance with yet another embodiment of the present invention;
Figure 9B is a cross-sectional view of a disposable absorbent article using the absorbent core in Figure 9A;
Figure 10A is a simplified illustration of an absorbent core element in accordance with yet another embodiment of the present invention;
Figure 10B is a further illustration of the absorbent core element in Figure 10A, shown in an applied state;
Figure 10C is a simplified illustration of an absorbent core using the absorbent core elements in Figure 10A, as shown in an applied state;
Figure 10D is a perspective view of an alternative absorbent core using the elements of the absorbent core in Figure 10A;
Figure 10E is a simplified plan illustration of a pair of absorbent core elements used in an alternative absorbent core, in accordance with the present invention;
Figure 10F is a simplified perspective view of an absorbent core using the core elements in Figure 10E;
Figure 10G is a simplified plan illustration of yet another alternative absorbent core in accordance with the present invention;
Figure 11A is a simplified perspective illustration of an alternative absorbent core, according to the present invention;
Figure 11B is a simplified perspective illustration of a source of elastic absorbent core element shown in a tensioned state, according to yet another embodiment of the present invention;
Figure 11C is an illustration of the simplified plane of the source of the absorbent core element in Figure 11B, shown in a relaxed or contracted state;
Figure 11D is a simplified perspective illustration of a network or source of double absorbent core elements of the type shown in Figure 11C;
Figure 11E is a simplified plan illustration of a network or a source of alternative absorbent core elements according to yet another embodiment of the present invention, shown in a tensioned state;
Figure 11F is a simplified plan illustration of the aunt or source of the absorbent core in Figure 11E, as shown in a relaxed or contracted state;
Figure 12 is a simplified plan illustration of yet another alternative absorbent core according to the present invention;
Figure 13A is a simplified plan illustration of an absorbent core in Figure 12, in a pre-applied state, according to the present invention;
Figure 13B is a simplified plan illustration of an absorbent core element in accordance with yet another embodiment of the present invention;
Figure 13C is an exploded perspective view of a double layer absorbent core using the absorbent core element in Figure 13B, according to the present invention;
Figure 13D is a flat illustration of the absorbent core in Figure 13 C;
Figure 13E is a plan illustration highlighting the variable absorbency in the pair of absorbent elements 5 used in the absorbent core of figure 13D;
Figure 13F is a plan illustration highlighting the variable absorbency in the absorbent core in Figure 13E, in accordance with the present invention;
Figure 14A is a simplified plan illustration of an absorbent core element according to yet another embodiment of the present invention;
Figure 14B is a plan illustration of the absorbent core element of Figure 14A in a post-folding stage;
Figure 14C is a simplified plan illustration of an alternative resulting absorbent core according to the present invention;
Figures 15A-B are simplified illustrations of stages in the manufacture of a core construction from a network of core elements, according to the invention; and
Figures 16A-16C are simplified illustrations of a method of laterally stretching a core construction of the invention. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
The present invention is directed, in one aspect, to the development and use of alternative absorbent core models that maintain or improve the comfort and fit of the absorbent article, while maintaining or improving the absorption and sealing capacity of the core. and the absorbent article. Various embodiments of the invention place particular emphasis on the selective placement and molding of commercially available absorbent materials, while maintaining the cost efficiency and manufacturing capacity of the resulting disposable absorbent article. In one aspect, emphasis is directed towards the selective placement and variation of absorbent materials along the longitudinal and / or lateral direction (that is, the absorbent profile) to obtain certain functionality and efficiency. Selected absorbent profiles provide regions or space within the resulting core construction exhibiting advantageous absorbent or absorptive capacity per unit area (sometimes referred to here as "absorbent density" or "absorption density"). As briefly mentioned above, several aspects of the invention are particularly applicable to baby diapers (and also to training pants). For this reason, most of the description and illustrations of this invention are provided in the context of diapers. It will become apparent to a person skilled in the art with the present disclosure, however, that the invention, and its various aspects, are also applicable to other disposable absorbent articles and absorbent core constructions. Detailed descriptions and illustrations of the modalities of the invention should therefore not be considered as limiting the invention.
Figures 2A and 2B illustrate a disposable absorbent article 20, in the form of a diaper, which contains several aspects of the present invention, including an improved absorbent core construction 210 (see also figure 2C). The absorbent article 20 has a backsheet 201 and a topsheet 202 which is shown partially removed in figure 2A to reveal the construction of the absorbent core 210. Together, the combination of the backsheet 201 and the topsheet 202 helps to define a chassis or central body 5 205 of the absorbent article 20. The central body 205 also provides a first waist end region 213a, including a first longitudinal end edge 212a (or simply the first end edge 212a), a second end region 10 waist 213b including a second edge of the longitudinal end 212b (or second edge of the end) and a longitudinal centerline YY extending the length of the central body 205 to fork the edges of the first and second ends 212a, 212b. Referring to figure 2A, the 15 waist regions 213a, 213b can be identified with the portions of the absorbent article 20 and the central body 205 which are generally positioned vertically, and above and around the user's thighs when the absorbent article 20 is used . The central body 205 also helps to define a groin region 214 located generally centrally between the first and second waist regions 213a, 213b and around a lateral central line XX. As is readily known to consumers and, likewise, to 25 manufacturers, much of the groin region 214 is generally positioned horizontally and / or is curved upwards when article 210 is in use. The construction of the absorbent core 210 is preferably centralized and supported around the groin region 214 and the top sheet 30. In such an arrangement, the absorbent construction 210 is placed in an almost optimal position to receive the body exudates when the absorbent article 20 is in use. Absorbent construction 210 is also described herein as having a first longitudinal end 207a (or simply, first end 207a) and a second longitudinal end 207b (or second end 207b), spaced longitudinally from first end 212a and second end 212b of the central body 205, respectively. In some embodiments, the first and second ends 207a and 207b of the absorbent construction 210 may not be clearly defined, for example, as an edge, line or point. In such embodiments, the terms first and second ends are used to generally identify the margins of the absorbent construction or absorbent core spaced farther along the longitudinal direction from the lateral centerline, XX. In other embodiments, the first and second ends cannot be defined by one element or core component, but by several components or elements.
To facilitate description and illustration, the construction of the absorbent core 210 is generally illustrated and described as consisting only of layers of absorbent materials, as illustrated in figures 2A-2C. Absorbent construction 210 is therefore simply referred to here as an absorbent core 210. As will also become apparent from the descriptions of various embodiments of the invention, absorbent core 210 may be comprised of more than one core component applied independently or absorbent core element that has significantly improved absorbent properties. In the embodiment of figures 2A-2C, for example, the absorbent core 210 includes a first absorbent core element 211a and a second absorbent core element 211b which are applied separately during assembly. The absorbent core elements 211a, 211b can be constructed from any combination of non-woven material, absorbent fibers and / or superabsorbent particles, as briefly discussed above. In this embodiment, the shape of the absorbent core element 211a, 211b deviates from the conventional rectangular shape and takes on an irregular non-rectangular shape that applicants have discovered and which provides certain benefits or helps to achieve specific core features and shapes.
As shown in figures 2B and 2C, the first and second elements of the absorbent core 211a, 211b are preferably provided in a generally trapezoidal shape. Among other things, the irregular shape of the core element 211 is conducive to the formation of an hourglass-shaped absorbent core. In this embodiment, the first and second trapezoidal core elements 211a, 211b are preferably made of the same or substantially similar absorbent material and, more preferably, originate from the same source or absorbent core composite fabric to facilitate and alleviate manufacturing. In one aspect of the invention, the absorbent core elements 211a, 211b are also of the same shape, and thus one core element can be substantially indistinguishable from the other, except for the position or orientation taken by the core element in the final assembly of the core resulting absorbent. This existence of common factors and consistency facilitates manufacturing and, ultimately, helps to control the cost of the product. For convenience, core elements 211a, 211b can be referred to simply using the same reference number (i.e., 211). It should be noted, however, that other applications and other embodiments may require elements of the absorbent core having different properties or characteristics (for example, absorbent properties) in order to obtain a particular absorbent core design or capacity as a whole. The absorbent core elements can also take the form of very different shapes and configurations, as will be illustrated in other modalities described in this Detailed Description.
The trapezoid-shaped core elements 211 can be formed and applied by any number of suitable means, including vacuum forming techniques, cutting with the aid of rotating molds and cutting with the use of water jet devices. Referring to the upper core element 211a in Figure 2C, the width of each trapezoidal shaped absorbent core element 211 is tapered from a first wide end 217a or wide section to a second narrow end 217b or narrow section. As applied to absorbent article 20, each trapezoidal shaped absorbent core element 211 is preferably positioned in alignment (coincident) with the longitudinal center line YY of absorbent article 20 with the wide end 217a located near one of the waist regions 213 central body 205 and the narrow end 217b located more internally. The two core elements 211 are partially and mutually overlapping or overlapping near the center of groin region 214, such that the narrower overlapping sections form a double layer section 250 (distinguished by using hatches in figure 2C) of absorbent core 210. In addition, the two elements of core 211 are positioned as substantially mirrored images of each other, such that the resulting absorbent core 210 is generally around the longitudinal centerline YY and around the lateral centerline XX. In this configuration, the wider ends 217a of the core elements 211 provide or coincide with the longitudinal ends 217 of the resulting absorbent core 210.
It should be noted that because the two elements of the core 211 are identical in shape and in substance, the application and positioning of the elements of the core 211 within article 20 can be simplified. Core elements 211 can be applied separately or through separate subprocesses. Core elements 211 can also come from the same source or network of absorbent material and can generally be applied together through the same subprocesses with a core element being inverted, rotated, rotated or otherwise manipulated to achieve its position end adjacent to the other core element 211.
Referring specifically to figure 2C, the resulting two-element absorbent core 210 therefore has a narrow middle section or central region M0 which is positioned close to the lateral central line XX in groin region 214. This narrowing of the central region MO greater comfort for the user, as well as compatibility with the leg sealing components of the absorbent article 20. The greater the amount of absorbent material per unit area in the narrower central region MO and, more specifically, in the multi-section layers 250, this provides greater or optimized absorbency in the portion of the absorbent article 210 that has the greatest need for it. Therefore, the multilayer section 250 can be referred to as the primary absorbent region 250. In addition, the resulting absorbent core 210 is wider upward from groin region 214 towards the anterior and posterior longitudinal ends 207a, 207b (i.e. , the upper absorbent regions). This greater extent of core material increases the absorbent coverage in these upper regions of the absorbent article 210. The extra core material also helps to seal and prevent leakage into and from the waist regions 213 of the article 210.
To facilitate the present description, the absorbent core 20 can be described as having a narrow central region or middle section M0, and a pair of end regions E1, E2 on opposite sides of the central region M0. The locations or boundaries of these regions are only generally defined (for the purposes of this description). In various embodiments, the primary absorbent region 250 is substantially located in the central region M0, but can extend longitudinally into the end regions E1, E2. The end regions E1, E2 can also be referred to as the upper absorbent regions, since these regions are generally positioned above the central MO region, when the absorbent article is in use.
The graphical illustration of figure 2D illustrates the increase and decrease in the concentration of absorbent material in the absorbent article 20 along the longitudinal center line YY from one end region of the waist 213a to the other end region of the waist 213b. This graphic illustration therefore represents the longitudinal absorbance profile of article 20 from one end 212a to the other end 212b. The illustration also helps to describe profiled cores according to the present invention as an absorbent construction with marked variations in absorbance (absorbent capacity per unit area (eg, square inch) or absorbent densities) along specified directions or in specific locations in the central body 205. As explained above, the higher concentration of absorbent material provided by the two layers of central elements 211a, 211b provides high absorbency in the groin region 214 of the absorbent article 20. The absorbent article 210 also exhibits absorbance per unit area nearby groin regions 213a and 213b, as granted by end regions E1, E2 of core 210, although it is significantly reduced from that characterizing primary absorbent region 250. However, core elements 211 extend sufficiently upward to the waist regions 213a and 213b to expand and extend the absorbent cover article 210. In addition to the absorbent core 210, the absorbance (and absorbance per unit area) of the disposable absorbent article 20 falls significantly as expected. Figure 2E illustrates the lateral absorbance profile of the core 210 along a lateral direction demarcated by the line LL-LL in figure 2A. This LL-LL line is effectively located below the lateral center line XX. The lateral absorbent profile illustrates a relatively narrow absorbent region with relatively high absorbency and / or absorbent density.
In the descriptions provided here, the inventive core can be described as a profiled core. In the present context, this description refers to the varied absorbency conferred on the absorbent article along specific directions or at specific locations on the central body. It also refers to the varied physical contour of the resulting absorbent core - which is illustrated by the absorbent profiles in figures 2D and 2E. It should be noted that, in some applications, variation in absorbent densities can be obtained using core materials of different absorbent properties instead of, or in addition to, core materials of substantially similar absorbent properties.
In developing the various configurations provided in this document, the optimal use of absorbent materials is an important consideration of the model. A balance is often struck between obtaining high absorbency in the article and maintaining low material cost. This also requires control over the use and concentration of absorbent material in order to prevent lumps from forming or causing the components to collide with the user's skin, compromising their comfort. Without care, an irregular core profile can also negatively affect the shape of the absorbent core when used and lead to tensioning of the article's leak prevention mechanisms (for example, leg hems and leg folds). Thus, in addition to cost considerations, the proposed absorbent profiles are not simply the result of depositing as much absorbent material as possible.
As discussed above, primary design considerations also include manufacturing capacity and ease of assembly. Often, these attributes translate into cost efficiency in the resulting product, as well as higher build quality. In this regard, the present invention achieves improved product models, including configurations that obtain specific absorbent properties and / or specific shapes without sacrificing or overloading the manufacturing capacity. A feature of the invention that helps to achieve these goals is the use of substantially identical core elements to create various core shapes, including irregular shapes (e.g., non-rectangular) and absorbent profiles. The selection of the core elements also provides design and manufacturing flexibility as Figure 2C helps to illustrate.
As an example, the configuration of the invention and selection of the core elements 211 allows the manufacturer of the absorbent article 20 to readily vary or fine-tune the shape of the absorbent core of the absorbent core 210 and the disposable absorbent article 20 by adjusting the distance X between the longitudinal end 217a of the first core element 211a and the longitudinal element 217b of the second core element 211b. In this way, the total length L of the absorbent core 210 can be adjusted to accommodate different sizes of absorbent articles. Such a linear fit can easily be done in a substantially linear assembly process of the absorbent core. This adjustment also allows the desired lateral or longitudinal absorbent profiles to be achieved, including the enlargement or reduction of the primary absorbent region. The manufacturer can also make additional modifications to the absorbent profile and the overall dimensions of the core by adjusting the length C and the widths A and B of the individual absorbent core elements.
Figures 3A and 3B illustrate an alternatively profiled absorbent core 310 used in an absorbent article 30 and composed of identical absorbent core elements 311a, 311b with an alternative shape (where similar elements are referred to using similar elements). In this embodiment, a first rectangular shaped absorbent core element 311a is partially coated or superimposed on at least a second rectangular shaped absorbent core element 311b to produce an absorbent core 310 of a different shape and absorbent profile. The key features of this modality again include a lateral narrowing of an average section M0 of the absorbent core 310 to achieve an approximate hourglass shape. The longitudinal position of the narrow middle section M0 can vary by displacing one of the rectangular shaped core elements 311 laterally with respect to the second rectangular shaped core element 311. The absorbent core of the invention 310 also provides upper or end regions laterally. wider El, E2 that seal the middle section MO. The overlap of two core elements 311 also forms a double layer primary absorbent region 350 in the central region M0, which exhibits a relatively higher concentration of absorbent material. In this embodiment, the primary absorbent region 350 extends all the way through the length of the end regions E1, E2.
Figures 4A and 4B represent an alternative absorbent core 410 which is a further variation of the absorbent cores 210, 310 described above. The absorbent core 410 is produced from two non-rectangular, irregularly shaped absorbent core elements 411a, 411b, however, in this embodiment, each core element 411 has a parallelogram shape. These core elements 411a, 411b are superimposed to produce a longitudinally and laterally symmetrical absorbent core 410 (symmetrical around the longitudinal and lateral center lines YY, XX). With this configuration, the longitudinal ends 407a and 407b of the absorbent core 410 are defined by a single straight edge (parallel spaced from the edge of the absorbent article (not shown)). Thus, the absorbent regions of the E1, E2 end of the core 410 are quite uniform, and less likely to tangle, collide, squeeze or cause discomfort to the user. Like the absorbent core of figures 3A, 3B, the absorbent core 410 has a primary absorbent region 450 that can extend from the central region M0 into the upper absorbent regions E1, E2.
In yet another aspect of the present invention, an absorbent core 510 is obtained using a pair of non-symmetrical absorbent core elements 511a, 511b, as shown in figures 5A and 5B. The core elements 511a, 511b are provided in a rectangular or parallelogram shape and together form an absorbent core 510. In this embodiment, the two core elements 511a, 511b are superimposed close to mutually adjacent ends 517a, instead of centrally . This overlap produces a primary absorbent region of generally kite shape 550 suitable for incorporation into a disposable absorbent article 50, such as that shown in figure 5B. Thus, the resulting absorbent core 510 is characterized as having a higher concentration of absorbent material in an end region E1 (also a higher absorbent density), and a lower concentration, but greater space of absorbent material in an opposite end region E2, and a longitudinal absorbent profile that reflects the same. In the middle, the absorbent core 510 still exhibits a narrow central region M0.
It is anticipated that an absorbent core of this type can be used in a baby diaper construction with the end region including the primary absorbent region being presented in front of the user, thus positioning a region of high absorbency to receive liquid exudates, and a wider absorbent region shown at the back of the user to provide better containment of solid exudates. In addition, the two elements of the absorbent core 511a, 511b can be arranged to have a v-shaped recess in the back of the diaper, thus providing a containment pocket for the collection of feces.
In alternative embodiments, the core elements can be modified with angled edges (such as longitudinal ends). The edges of the adjacent core elements may cooperate to have a straight edge at the front or rear ends of the core, similar to that provided in the parallelogram-shaped core elements 411 of figures 4A, 4B.
Figures 6 to 9 illustrate alternative absorbent articles that incorporate various aspects of the invention, including absorbent cores of advantageous designs. More particularly, these alternative embodiments illustrate another way of obtaining advantageously shaped and advantageously shaped absorbent cores, and disposable absorbent articles with different absorbent profiles. In one aspect of the present invention, the elastic materials are attached to, or otherwise incorporated into, the absorbent core element (s) to generate absorbent core constructions of the invention.
Referring first to Figure 6A, an absorbent core element 611 is initially provided having a generally rectangular shape and a pair of longitudinally spaced ends 617a, 617b. A suitable tensile elastomeric material 619 is selectively applied to or within the absorbent core element 611 at various points or locations near the first end 617a. The elastomeric material 619 is oriented longitudinally in the lateral direction. Suitable elastomeric materials include, but are not limited to, elastic filaments, elastic films or elastomeric adhesives. As shown in figure 6A, the elastomeric material 619 is preferably an elongated elastic element, such as an elastic filament. The applied elastomeric materials are referred to simply as elastic or elastic elements. The selected attachment points preferably make a predetermined pattern that describes multiple laterally oriented rows of elastics 619 at constant slopes, as shown in figure 6A. Therefore, the applied pre-tensioned elastics impart an elastic force in the generally lateral direction along the absorbent core element 611.
Preferably, the rows of elastic bands 619 are concentrated in a region 670 near a longitudinal end 617a of the core element 611 (i.e., a substantially stretched end region 670). Although this longitudinal end region 670 of core element 611 is substantially incorporated with elastics 619, the opposite end region 672 is substantially free of elastomeric (i.e., unstretched) elements. Figure 6B shows the absorbent core element 611 in a relaxed state. Releasing the elastics 619 from the tension allows the elastic region 670 to substantially contract and narrow (in relation to the other regions), and for the rectangular shaped core 611 to deform to an almost trapezoidal shape.
Figure 6C shows an absorbent article 60 using a pair of absorbent core elements 611 and a resulting absorbent core 610 having an advantageous hourglass shape and a unique absorbent profile. The absorbent profile of the core element 611 reveals a higher concentration of absorbent material in the area of the elastic core region 670 due to the material of the contracted core. A first absorbent core element 611a is positioned on a second substantially similar absorbent core element 611b to define a substantially elastic and narrow central region M0 and generally non-elastic and wider end regions E1, E2. As previous embodiments have demonstrated, the configuration of the invention also provides a higher concentration of absorbent material (higher absorbent density) in the central region M0 of the absorbent core 60 than in the end regions E1, E2. The elastic core region 670 defined in this embodiment corresponds substantially with the primary absorbent region 650 described in previous embodiments. The primary absorbent region 650 is therefore defined both by a greater absorbent capacity per unit area as conferred by the multiple layers of absorbent material and by the high contraction due to the high concentration of elastics 619.
The cross-sectional view of figure 6D reveals a central region M0 that is composed not only of multiple layers of core, but of layers of core material that are more highly concentrated. The contraction of the core elements 611A, 611b creates ripples in each core element 611a, 611b, producing yet another unique physical profile and unique absorbent profile. Generally, the contraction of the core material produces a core element of greater average thickness. In addition, stacking one core element on top of the other wavy core element produces a thicker and larger absorbent core (by volume). The core includes voids or S0 spaces between the core elements 611a, 611b and between the top core element 611a and the top sheet 602 (or the A / D layer). The contracted core material also provides Cl channels which function as acquisition and distribution channels for the absorbent core 610 and P ridges next to the Cl channels. The Cl channels help to capture liquid exudates, for example, and disperse the liquids over a larger area of the core material. Figure 6D also shows an additional supplementary layer 639 of a nonwoven material or core below each of the core elements 611a, 611b. Supplementary layer 634 is provided to promote and provide adhesion between the core material and the elastics 619. In the cross-sectional view of figure 6D, the supplementary layer 639 is below the elastics 619.
Figures 6E and 6F illustrate a variation of the elements of the absorbent core of the invention in figures 6A to 6D (where similar elements are identified using similar reference numbers). In one embodiment, the tension placed on the elastics 619 'during attachment to the absorbent core element 611' is increased. When the elastics 619 'are released, the core material contracts further to produce an elastic region 670' having a total area that is reduced in relation to that in the embodiment shown in figures 6A to 6D. An elastic region with a different shape 670 'can be produced by selecting a different type of elastic or an elastic of different shape and length. A different shape, particularly the curvature, can also be created by changing the tension denier of the elastic filament, changing the number of or pitch between the elastics, and / or changing the position of the elastic (s) (for example , varying the distance between successive elastics). In this embodiment, the resulting absorbent core 610 'has a narrower and more pronounced central region M0. The central region M0 takes on a more curved or concave shape in the transition between the elastic region 670 'and the end regions E1, E2.
Figures 7A and 7B demonstrate yet another embodiment of the present invention, in which an absorbent core is provided with a single individual element 711. An alternatively molded absorbent core or core element 711 is produced by the selective placement and fixation of elastic elements 719 within of the core material, below the core element, or at the top of the core element. By the selective placement of the elastic filament or other elastomeric materials, the relative width of the core element 711 in these areas is reduced, as discussed above. Figure 7A shows such a modality of this core, with pre-tensioned, extended elastic filaments 719 attached to the absorbent core element 711 in a central elastic region 770. When the tension is released, the width of the absorbent core element 711 is substantially reduced, as shown in figure 7B, creating a region of narrow elastic material M0.
Figures 7C and 7D illustrate yet another embodiment in which an absorbent core element 711 provides an absorbent core with an elastic central MO region. Elastics 719 are applied to the core element 711 in the same laterally extended manner. However, the elastics in this modality are arranged in rows of different steps to achieve a specific shape. Preferably, elastics 719 near the lateral centerline XX are spaced closer together, while elastics 719 further away from the center are more spaced. The area near the XX lateral center line is therefore more elastic than the more distant areas. This results in an absorbent core 711 having a more gradually narrow central region or MO curve. By varying the pitch in this way, the curved shape of the narrowed central region can be further adjusted.
Figures 8A through 8E illustrate yet another aspect of the invention, in which elastic elements 819 are introduced between, above, within or below multiple layers of absorbent core elements. Figure 8A provides a simplified illustration of an illustration of an absorbent core construction 810. Pre-tensioned elastic elements 819 are first arranged below a first elongated absorbent core element 811a and attached thereto. The elastics 819 in this exemplary embodiment are centrally located in relation to the first core element 811a, and are spaced at a consistent pitch. The figures show elastic filaments used as elastics 819; however, elastic materials such as elastic film, elastic adhesive or elastic non-woven fabrics can be used to achieve similar effects.
Referring also to the view in figure 8B, a second absorbent core element 811b is provided and then implanted on top of the first absorbent core element 811a. The second generally rectangular absorbent element 811b is cut appropriately shorter (and probably also reduced in width) to match the dimensions of the desired primary absorbent region and / or the desired absorbent profile. The elastics 819 and the double layer of absorbent core elements 811a, 811b are bonded using any suitable bonding means, such as hot melt adhesives, ultrasound bonding or by melting thermoplastic fibers by heat. It is a desirable but not necessary feature of this invention that at least one of the absorbent core elements 811 (i.e., the upper absorbent core element 811b in figures 8A, 8B) is slit or cut in several places (producing slits 873). As shown in the Figures, the upper absorbent core element 811b preferably contains multiple slits 873. Slits 873 are generally aligned in the lateral direction and, in this embodiment, reel in rows of two and three slits. Slits 873 preferably penetrate completely through each layer of absorbent material, and in some embodiments they can be between 1 and 50 mm in length. It is envisaged that the invention also allows other layers of cracked or non-cracked absorbent material (core elements), elastic materials, fluid handling materials, such as acquisition layers or wave layers, layers of fabric, layers of nonwoven or films.
Both figures 8A and 8B illustrate the shape of the absorbent core 810 before releasing the elastics 819 from the tension. Figure 8C shows the absorbent core 810 after the elastics 819 are released. The width of the absorbent core 810 in an elastic central region M0 is substantially reduced, particularly more around the lateral axis XX, where the elastics 819 are grouped. In addition, the laterally aligned slots 873 arranged in the upper core element 811b open and create voids 875 within the core element 811b. These voids 875 provide passages that facilitate fluid flow to lower levels of the core construction (e.g., the first core element 811a) of the absorbent core 810.
Figure 8D shows an alternative absorbent core 810 'that achieves a slightly different shape by arranging the rows of elastics 819 by arranging the elastics 819 at a greater slope (than in Figures 8A, 8B). This arrangement produces a more flattened curved central region M0. Figure 8E illustrates a variation of the core construction described in figures 8A-8C. In this alternative absorbent core 810 ", the pre-tensioned elastic elements of the 819 are arranged between the two layers of the absorbent core 811a, 811b (instead of below the bottom core element 811a). As discussed earlier, the elastics for be distributed above, below, within or between any of the layers of the absorbent core In some embodiments, the elastic bands are preferably positioned within or between the layers to promote adhesion.
Figure 9A further illustrates a further aspect of the present invention. The elastic accordion 910 absorbent core construction is produced with two absorbent core elements 911a, 911b and elastic elements 919. Notably, the longitudinal center line YY or the longitudinal direction of the absorbent article is identified as being perpendicular to the elastics 919. Figure 9B is a side cross-sectional view of the disposable absorbent article 90 using the absorbent core 910 with the cross section aligned along a single elastic 919 extending laterally. A series (or layers) of pretensioned elastic elements 919 is arranged between a first absorbent or bottom core element 911a and a second or higher absorbent core element 911b. The two layers of core elements 911a and 911b and the pretensioned elastic elements 919 are connected at predetermined locations along the lateral extension of the tensioned elastic 919. The connection locations are preferably equally spaced. In this specific embodiment, the connection sites that effectively make longitudinally extending connecting filaments 930 that generally extend continuously through the rows of laterally oriented elastics 919. Thus, between two elastics 919, the core elements 911a, 911b can be connected directly with each other. Between the connecting strips 930, the core elements 911a, 911b remain unconnected. Bonding can be achieved using hot melt adhesives, ultrasound bonding, by melting thermoplastic materials by heat, or by any other suitable means.
The clearly defined connecting strips 930 are generally perpendicular to the direction of elasticity (lateral direction in this embodiment). Consequently, when the tension in the elastics 919 is released, the core elements 911a, 911b contract with the elastics 919 on both sides of the connecting strips 93 0. In the unconnected areas between the connecting strips, the unrestrained parts of the increase core elements rise to create peaks or ridges Pl. As shown in figures 9A and 9B, depressions TI are also produced between the ridges P1 and along or around the length of the connecting strips 930. The resulting absorbent core 910 provides, therefore, an accordion-like structure defined by a regular series of Pl peaks and TI depressions. As will be shown in figure 9B, the accordion-shaped core 910 has an abundance of voids or spaces that laterally extend S0 between the core elements 911a, 911b and between the upper core element 911b and the upper sheet 902.
An important benefit of the resulting structure is that the construction of the core of the invention reaches height (i.e., that promotes comfort and softer regions) and voids from an otherwise flat core and without significant void volume. The empty volume added serves to provide temporary fluid retention and fluid transport space. This space provides the fluid with a place within the limits of the diaper to temporarily reside for the few seconds it takes for the superabsorbent to activate and permanently trap the fluid. The TI depressions and the voids or S0 spaces above the TI depression channels channel and facilitate the dispersion of fluid exudates.
Figures 10A - 10H show absorbent core constructions incorporating additional aspects of the present invention. These absorbent core constructions provide ergonomically shaped cores that increase the adjustment and sealing capabilities of the resulting disposable absorbent article. In particular, the model of the absorbent core constructions target an absorbent core that has an approximate hourglass shape and an advantageous absorbent profile. With respect to the absorbent profile, the absorbent core constructions of the invention in these figures illustrate means for distributing absorbent core material in an optimized non-uniform manner within and along the central body of the disposable absorbent article.
Referring first to Figures 10A and 10B, a single layered core element 1011 is provided in an elongated generally rectangular shape, which can be described as having longitudinal and lateral center lines YY, XX, the first and second longitudinal ends 1017a and 1017b, and the right and left side margins 1006a, 1006b, respectively. According to the invention, the core element 1011 is marked by a pair of generally lateral cuts or slits 1008 that originate in an extended form, the right margin 1006a. The slits 1008 are preferably terminal close to the left margin 1006b, but are spaced far enough to avoid compromising the structural strength of the core element 1011. Each of the slits 1008 is preferably spaced at the same distance from the close longitudinal ends 1017a and 1017b. Slots 1008 help define the three sections of the core element 1011: an upper section or flap 1003; a middle or median section 1004; and a bottom section or tab 1005.
In one aspect, each of the slots 100 8 is long enough to allow adjacent flap 1003, 1005 to fold and pivot away from the middle section 1004, as shown in figure 10B. The upper and lower flaps 1003, 1005 are preferably moved in this way and at an acute angle from the middle section 1004. If necessary, the width and shape of the slits 1008 can be enlarged and / or the left side margin 1006b provided with cutouts close to the slot 1008 to accommodate the rotation of the flaps 10 03, 1005 and the compression of the area along the lateral margin 1006b.
Turning now to figures 10C and 10D, an advantageous absorbent core construction 1010 is created through the cooperation of two substantially similar core elements 1011 of the type shown in figures 10A-10B. For purposes of description, one core element 1011 can be referred to as a first or right core element 1011a, and the other core elements 1011b as a second or left core element 1011b. The two core elements 1011 are substantially similar and the components of the two core elements 1011 are referred to using similar reference numbers. The two core elements 1011a, 1011b are placed adjacent to each other in such a way that the slits 1008 are laterally aligned and substantially coincident. The core elements 1011a, 1011b are preferably spaced the same distance from a longitudinal center line YY. With this placement, each of the tabs 1003 or 1005 is opposed to a corresponding tab 1003 or 1005 and is moved and rotated away from the longitudinal center line YY. This creates an open or recessed section 1026 above the slits 1008. There is some overlap between each pair of opposite flaps 1003, 1005, however, and in the context of the resulting absorbent core 1010, each pair of opposite flaps 1003, 1005 cooperate to form a of two regions with an enlarged and enlarged end E1.
As also shown in Figure 10C, the middle sections 1004 substantially overlap and cooperate to create a highly absorbent central region M0 of the resulting absorbent core 1010. Preferably, the central region M0 is symmetrically aligned around both longitudinal center lines. YY. As also shown in figure 10C, the central region M0 is substantially narrower than the regions at the end E1, E2. It is an advantageous feature of this embodiment that the transversely displaced flap pairs 1003, 1005 are displaced outward and slightly rotated to help form the general hourglass shape of the absorbent core 1010. In yet another advantageous aspect, the flaps 1003, 1005 and the slots 1008 that help to define these sections can readily relate and connect to facilitate cooperation between the elements of the 1011 core. This connection feature helps to stabilize the resulting absorbent core 1010 and to positively shape and shape the El end regions. , E2 according to the desired model. In specific applications, this connection relationship helps to protect against any slope in the end regions E1, E2 to return towards the longitudinal center line YY.
Figure 10D illustrates an optional and additional configuration using core elements 1011 in figures 10A-10C, where similar elements are referred to again using similar reference numbers (as used previously in connection with figures 10A-10C). This additional configuration addresses possible deficiencies in the configuration described above. Referring to figure 10D, a resulting absorbent construction 1010a uses a third core element 1011c. Generally, the third core member 1011c provides a substantially rectangular layer of absorbent material to add to the central region M0. The third element of the core 1011c in this embodiment is made longer than the middle sections 1004, in order to cover any undesirable areas of low or substantially zero absorbance. In particular, the third element of the core 1011c is shaped and positioned to extend over the previously opened recess 1026 in figure 10C (see figure 10C), thus covering the recess 1026.
The third element of the core 1011c also increases the primary absorbent region 1050 of the absorbent core, increasing its absorbent capacity. It is noted, however, that in other embodiments it may not be desirable to increase the thickness or absorbency of the primary absorbent region (to minimize the cost and complexity of manufacture, for example). In such cases, the thickness of the third core element and the other core elements can be adjusted to minimize the overall thickness of the central region. In the illustration of figure 10D, this third core element 1011c is shown positioned between the other two core elements 1011a, 1011b. In other embodiments, the third element of the core 1011c can be positioned above or below both elements of the core 1011 (such as the topmost layer or the lowest layer of the absorbent material).
Figures 10E and 10F further illustrate a configuration and variation of the additional invention, wherein the first and second elements of the absorbent core 1011a, 1011b provide the components of yet another resulting absorbent core 1010b (see figure 10F). This resulting absorbent core 1010b presents an alternative means to increase the absorbency in regions of zero and substantially zero absorbance. Each of the core elements 1011a, 1011b is again supplied with a pair of side slots 1008 that help to define an upper flap 1003, a middle section 1004 and a lower flap 1005. In this embodiment, the upper and lower flaps 1003, 1005 do not are substantially identical. For the first core element 1011a, the top flap 1005 is shorter than the bottom flap 1003. Thus, the top flap 1005 also provides a smaller area than the bottom flap 1003. In contrast, the second element of core 1011b is provided with an upper flap 1005 which is longer and thus larger than the lower flap 1003. Now referring to figure 10F, core elements 1011a, 1011b are placed in a mutually cooperative relationship to form the desired absorbent core 1010b. As in other modalities, this cooperative relationship provides a substantially narrow central region of double layer M0. The combination of core elements 1011a, 1011b also forms end regions E1, E2. As best illustrated in figure 10F, the overlap of the various regions of the two core elements 1011, 1011b tends to cover voids or regions of previously low or zero absorption (see, for example, recesses 1026 in figures 10A, 10B). These regions of previously low or zero absorbance are reduced or eliminated by extending the longest flaps near the center and overlapping the longest flap with the shortest opposite flap.
Figure 10G illustrates yet another alternative configuration for an absorbent core 1010c according to this embodiment of the present invention. Figure 10G illustrates an alternative cooperation of two core elements 1011a, 1011b that achieves a particularly desirable connection relationship. The side slits 1008 of the core elements 1011a, 1011b, as well as the top and bottom flaps 1005, 1003, positively connect to the core elements 1011a, 1011b. As shown in figure 10G, the two tabs 1003, 1005 of the first core element 1011a are placed below the corresponding tabs 1003, 1005 of the second core element 1011b, while the middle section 1004 of the first core element 1011a is placed above or at the top of the corresponding middle section 1004 of the second core member 1011b. This positive connection relationship between the two core elements 1011a, 11b helps to stabilize the resulting absorbent core 1010, and also reduces or eliminates the use of adhesive to fix the core elements 1011a and 1011b together.
Figure 11A illustrates yet another embodiment of the present invention. In particular, figure 11A shows an absorbent core 1110, which uses a pair of core elements 1111a and 1111b and exhibits a generally hourglass shape. The absorbent core 1110 has a narrow central region M0 which has a primary absorbent region with multiple layers 1150 formed by the mutual overlap of the two main elements 1111a, 1111b. For purposes of description, core elements 1111a are referred to as having longitudinal ends 1117a, 1117b, respectively and right and left side margins 1106a and 1106b, respectively. The absorbent core 1110 also provides substantially identical end regions E1, E2, both spaced longitudinally from the central region M0. The end regions E1, E2 have a lateral width that is greater than that of the narrower central region M0 of the absorbent core 1110. As with previous embodiments, the primary absorbent region 1150 is positioned around and extends from this narrow central region M0 of the absorbent core 1110. The resulting absorbent core 1110 therefore exhibits a glass shape similar to that of an hourglass, having larger upper or end regions E1, E2, and a narrow central region M0. As explained in relation to the previous modalities, this hourglass-like shape improves the fit and comfort of the disposable absorbent article, while simultaneously increasing the sealing capabilities of the article. It is observed that the core elements 1111a, 1111b used in this absorbent core 1110 have a more curved S-shape. The central elements 1111a, 1111b are also slender than the core elements of the embodiments described above. The resulting absorbent core 1110 therefore has a more aesthetically pleasing appearance and adapts well to the shape and configuration of the disposable absorbent article, before use and during use.
In yet another aspect, the core elements 1111a, 1111b use elastic bands 1119 which are located in selected locations. The selective and strategic placement of the 1119 elastics reaches the curved, S-shaped shape of each element of the core 1111a, 1111b. Notably, the elastics 1119 are oriented along a generally longitudinal direction in the application, and are provided with a relatively short length in relation to the length of each core element 1111a, 1111b. As will be explained in more detail below, the longitudinally oriented elastic 1119 serves to contract and bend (concave) the surrounding areas, which coincides with a localized portion of the close lateral margins 1106 of the core element 1111. As a result, each elastic filament 1119 tends making the longitudinal side margin 1106 of core element 1111 concave around a point at or near the middle of elastic 1119. To better illustrate how the curved shape of core element 1119 is achieved, another reference is made to figures 11B a 11D, each of which illustrates a stage in the manufacture or assembly of the absorbent core 1110.
The source of the absorbent material is shown as an elongated continuous network 1180 of absorbent material (or core elements). A stretched elastic 1119 (i.e., under tension) is applied near the lateral edge 1106a or 1106b of the mesh and is preferably laminated around the absorbent material. Depending on the specific application, the length of the stretched elastic 1119 is typically a significant proportion of the core length. Each elastic 1119 is oriented along the longitudinal direction and spaced by a short lateral distance from the near lateral margin 1106. For the illustrated embodiment, this lateral spacing is only about 1/10 of the width of the 1180 net. elastics 1119 are preferably applied intermittently along each side margin 1106a, 1106b. The spacing of the longitudinal elastics 1119 is preferably slightly larger than the stretched width of the individual elastics 1119, although it will be apparent to a person skilled in the relevant technique that the longitudinal spacing and length of the elastics chosen will depend mainly on the size and degree of curvature targeted to the absorbent core and resulting absorbent article.
In the manner described, a series of elastic bands 1119 is applied near each side edge 1106 of the network 1180 of absorbent material. To achieve the configuration illustrated in figure 11A, the series of elastic bands 1119 along one side margin 1106a is preferably substantially identical to the other series or placed along the other side margin 1106b. The intermittent period of the two series is, however, compensated for in half-time or 180 degree intervals. As shown in figure 11B, this means that along each lateral line through the network 1180 on which a rubber band 1119 is applied along a lateral margin 1106, that rubber band 1119 is the only elastic applied. The area along the opposite side margin 1106 is clear and inelastic. Along the longitudinal direction of the net 1180, the elastics 1119 are therefore applied alternately between one side margin 1106a and the other side margin 1106b. Therefore, along the longitudinal direction, the web 1180 of absorbent material can be described as being alternately elastic between one side margin 1106a and then the other side margin 1106b.
After the tension is removed from the elastics 1119, the regions around each elastic 1119 contract and the elastics 1119 pull the absorbent material into a collected material as shown in figure 11C. Due to the contraction of the tensioned elastics 1119 and the distribution pattern of the elastics 1119 in the alternating lateral regions, the absorbent mesh 1180 assumes a continuous S-shaped configuration. This S-shaped configuration provides alternating concave and convex curves. In this configuration, the 1119 elastics are present on the short sides or in concave portions and the non-elastic regions are found on the longest side or in the convex portions.
Figure 11D represents a continuous double network 1180 'of the absorbent core element consisting of two of the absorbent core networks 1180' described in figures 11B and 11C. The network 1180 'of the absorbent core element is formed by superimposing a first network 1180a of the continuous sinusoidal (or "S-shaped") absorbent material with a second network 1180b of continuous S-shaped absorbent material. The two absorbent networks 1180a, 1180b are arranged in an opposite non-parallel configuration, such that the elastics 1119 are laterally aligned. The result is that the elastics 1119 on the two networks 1180a, 1180b alternate between being both within the lateral margins 110 6 of the two absorbent networks 118 0 and both being outside the lateral margin 1106 of the two absorbent networks 1180. The network The resulting 1180 also has alternating wide and narrow regions. This resulting net 1180 is then divided into individual absorbent cores 1110 by cutting across the transverse width of the core, as indicated by the side line 1130. The cuts are preferably made at the widest side portions that coincide where the elastics 1119 are both located along the side. along adjacent side margins 1106. These wide side portions, where the elastics 1119 are on adjacent margins 1106, provide the end regions E1, E2 of the resulting absorbent core 1110 (see figure 11A). The narrow side portions between these overlapping wide side portions become the narrow central region M0 of the resulting absorbent core 1110. This substantial overlap of the nets 1180 in this narrow side portion also provides the primary absorbent region 1150 of the resulting advantageous absorbent core. 1110.
Figure 11E illustrates an alternating elongated network 1180c of the absorbent core element. In this embodiment, slits 1133 are introduced into the network 1180 of the absorbent core material to facilitate flexion and flexibility of the individual core elements. Slits 1133 are preferably applied as groups of elastics, each group being arranged primarily in the non-elastic region of the core network 1180 (where the lateral margin 1106 extends and curves inward upon the release of the elastics 1119). Figures HE and 11F illustrate the network 1180 with multiple slits 1133 oriented in the generally lateral or transverse direction. Slits 1133 cut the non-elastic portion of the close side margin 1106 of the net 1180. Figure 11E shows the net 1180 of the absorbent material with the elastic elements 1119 under tension. When the tension is released, the contraction of the elastic elements 1119 causes the surrounding region near the lateral margins 1106 to also contract. Meanwhile, slits 1133 in the inelastic regions allow these regions near the lateral margin 1106 to extend more readily and provide a smoother curve. In certain embodiments, the length of the slits 1133 is less than 1/2 or 1/3 of the side width of the net 1180. As a result, the net 118 0 of absorbent material adopts a continuous S-shaped configuration, which is then used as a source network for an elastic core of generally hourglass shape (see, for example, figure 11A).
Figure 12A illustrates yet another absorbent core 1220 according to an additional embodiment of the present invention. The absorbent core of the invention 1220 exhibits a narrow central region M0 and wider end regions E1, E2 and therefore provides yet another absorbent core generally in the form of an hourglass 1220. Notably, this configuration of an hourglass-shaped core can be achieved with a single core element. In one of the simplest forms, the absorbent core of the invention 1220 is formed by "twisting" a core element having the typical shape, generally rectangular, trapezoid or parallelogram. More specifically, one end 1217a of the core element is twisted or twisted clockwise (for example, the lower end 1217a in figure 12) and the other end 1217b is twisted or "twisted" counterclockwise. A narrow, twisted region of the core element is produced and provides the central region M0 of the absorbent core 1220. The wider open ends of the twist are arranged like the regions of the E1, E2 end of the absorbent core 1220.
Figures 13A-13B illustrate a method for making another "twisted" absorbent core 1310 or the absorbent core element according to the present invention. Referring to figure 13A, an absorbent core element 1311 is first provided in a generally preferably parallelogram format. Core element 1311 can be described as having a lower end 1317a, an upper end 1317b, a left side margin 1306a, a right side margin 1306b and four corners VI, V2, V3 and V4, each defined by the intersection of one of the ends 1317 and one of the side edges 1306. For the purposes of this description, the core element 1311 is further described as having a pair of twisted spaced axes ZZ and a longitudinal center line YY preferably positioned generally parallel to and equidistant between the axes of ZZ twist. Each of the ZZ torsion axes is therefore laterally offset from the longitudinal center line YY of the core element 1311. The ZZ torsion axes are also preferably laterally spaced from the opposite corners of the 1211 parallelogram-shaped core element.
As shown in figure 13, the lower left corner VI is twisted counterclockwise on its ZZ twisting axes, while the upper right corner V3 is twisted clockwise around its ZZ twisting axis. Referring to Figure 13B, the resulting twisted absorbent core element 1311 has a slightly distorted hourglass shape. However, the resulting core element 1311 or the resulting absorbent core construction provides certain features desired by the invention. The absorbent core element 1311 has a narrow central MO region, wider end regions E1, E2, and a primary absorbent region with multiple layers 1350 which provides greater absorbency at specific target locations. The core element can be further described having upper and lower V-shaped wings W1, W2 (respectively) which extend laterally from the rest of the absorbent core element 1311.
Alternatively, the core element 1311 of figure 13B can be combined with another core element 1311 having substantially similar structure to produce an advanced embodiment of the present invention. Figures 13C and 13D illustrate the fabrication of an improved absorbent core construction 1310 by combining two such absorbent core elements 1311. An upper core element 1311b is positioned above a lower core element 1311a, so that one is upturned. in relation to the other. Essentially, the core element 1311 in figure 13C is rotated 180 ° to the right and is shown as the lower core element 1311a in figure 13C. The flaps W1, W2 (of the core elements 1311), which are directly over each other, therefore extend in opposite lateral directions, as shown in figure 13C. The first element of the core 1311b is then placed (superimposed) on the second element of the core 1311a. Figure 13D shows a resulting absorbent core 1310 that has a more pronounced hourglass shape. The absorbent core also provides more defined and wider regions of the upper and lower extremities E1, E2.
Figure 13E illustrates the relative distribution of absorbent material in the core elements 13a, 13b used in the absorbent core 1310, before joining the two core elements 1311a, 1311b. The lighter areas represent regions provided by a layer of absorbent material, while the darker areas represent regions with two layers of absorbent material, and thus, of relatively higher absorbency. Figure 13F illustrates the relative distribution of absorbent material in the resulting absorbent core 1310, which is comprised of the two core elements 1311a, 1311b. The illustration reflects an absorbent core 1310 with a multifaceted absorbent profile along several directions (including along the longitudinal center line). This resulting absorbent core 1310 has regions with single (Al), double (A2), triple (A3) and quadruple (A4) layers of absorbent core material. The resulting absorbent profile reflects a highly absorbent region that is centered around the intersection of the longitudinal and lateral central lines (YY, XX, respectively), which provides the middle section MO. This highly absorbent region will correspond with, and provide sufficient coverage for, the groin region of the absorbent article. The resulting absorbent core 1310 further provides enlarged end regions E1, E2, which also exhibit varying absorbency, including wide regions extending from the middle section M0 with triple layers (A3) of absorbent material. A unique benefit of this multifaceted model is the creation of channels with smaller amounts of absorbent material (less layers of core). For example, figure 13F shows an X Cl shaped channel between the four A4 regions. These Cl channels help to distribute fluid to other regions of the 1310 core, thus using absorbent materials in other areas of the 1310 core.
The resulting absorbent core 1310 offers certain targeted benefits and benefits. Firstly, the resulting absorbent core 1310 provides a better and more formed fit for the user of the absorbent article, as well as improved leak prevention performance by providing absorbent material over a larger area of the article in the waist regions. Second, the resulting absorbent structure is absorbed through the article. A greater amount of absorbent material is provided in the groin area of the article, where fluid reception is expected. Concentrations of absorbent material, although smaller amounts, are also provided around the waist regions and the lateral margins of the absorbent article. These absorbent regions perform an improved leak prevention function.
Figures 14A-14C provide an additional embodiment of the present invention, showing an improved absorbent core construction and absorbency profile. Figure 14C describes, more specifically, a two-layer core construction 1410. Initially, an absorbent element 1411a is shown having a generally rectangular configuration. The core elements 1411a of this embodiment are provided with at least two laterally extending slits 1421, preferably positioned near or around the lateral centerline XX of the core element 1411a (and, finally, the resulting absorbent core construction 1410) . The laterally extending slits 1411 are directed inwardly from the opposite side margins 1413 of the generally rectangular core element 1411a. In this embodiment, each of the side slits 1421 extends inwardly about 1/5 of the side width of the core element 1411a. Four imaginary fold lines 1422 are also shown in the generally rectangular core element 1411a. Fold lines 1422 also extend inwardly from side margins 1413 and downward towards lateral centerline XX, thereby intersecting the end of side slits 1421, as shown in figure 14A.
The imaginary fold lines 1422 can be created by a variety of suitable means or methods, including initially pre-tensioning the absorbent core element 1411a or engraving the absorbent core element 1411a before the folding steps. In a sub-process of constructing the absorbent core 1410, a driving force is applied to the side margins 1413 of the core element 1411a above and below the location of the side slots 1421. This force dislodges and / or drives a resulting pair of flaps 14 23 inward around the imaginary fold lines 1422, as shown in figure 14B. The inciting force can be provided by air-jet mechanisms that blow or apply pressure on the lateral margins 1413 close to the imaginary fold lines 1422. In alternative processes, mechanical means, such as a plunger, can be used.
In any case, a pair of inwardly folding tabs 1423 is provided along each side margin 1413 above and below the previous position of side slot 1421. Turning to figure 14C, a second core element 1411b can be supplied centrally on top of the first core element 1411a, and from below and inward from the four tabs 1423. The second core element 1411b can be applied over the first core element 1411a prior to the push or bend steps (applied to the tabs 1423). Alternatively, the second core element 1411b can be inserted under the flaps 1423 after the folding operation. The second core element can also be applied over the top of the first or lower core element and two folded side flaps, such that the folded flaps are placed between the top and bottom core elements.
The result of either case is a generally absorbent core construction generally in the form of an hourglass 1410, as shown in Figure 14C. The construction of the absorbent core 1410 features an improved core absorbent region 1450, as provided by the second core element 1411b. Flaps 1423 also provide improved absorbency for the construction of core 1410 (since flaps 1423 are also made of highly absorbent material). In addition, the absorbent flaps 1423 provide an improved absorbent region that functions as a leak dam or sealant along the edges or lateral margins of the central region 1450. In addition, as illustrated in figure 14C, the absorbent flaps 1423 help to securing the second core element 1411b centrally and on top of the first core element 1411a. Specifically, the absorbent flaps 1423 wrap around the longitudinal edges of the second core element 1411b. In other embodiments, the second core element 1411b can be provided on top of the tabs 14 23 of the first absorbent core element 1411a, or below the first core element 1411a. In yet another embodiment, the second core element 1411b still provides improved absorbency in a central region 1450 of the hourglass-shaped absorbent core construction 1410.
Figures 15A and 15B illustrate how an overlapping core construction 1510, such as that provided in figure 2A, can be generated in an efficient and advantageous manner. As previously described, the core consists of two core elements A, B, having a trapezoidal shape. The selection of a trapezoidal shape allows the core elements A, B to be derived from the same material source. Preferably, a network 1580 of core material, as shown in figure 15A, is presented as the source of core material. The alternation of trapezoidal core elements A and B is stamped on or cut from the 1580 mesh. The two trapezoidal shapes or blanks A, B are identical, except that one is oriented 180 degrees from the other. Slanted alternating cuts 1581 can be made through the 1580 mesh (edge to edge) to produce and shape the two adjacent central elements A, B, without wasting mesh material. Each slanted section 1581 is common to both blanks A, B and simultaneously defines one side of both trapezoidal core elements A, B.
As shown in figure 15B, the two trapezoidal spaces A, B are then overlapped to form the desired core construction. In additional embodiments, a third element of the C core, which in this case has a rectangular shape, is arranged around the center of the 1510 core construction and overlaps both trapezoidal core elements A, B. The overlap of the core elements A, B, C defines an even more highly absorbent central region.
It will be realized by those skilled in the art that other core element formats can be selected, which allows adjacent blanks to be cut without wasting material. Adjacent blanks will preferably be irregularly shaped (as required by various embodiments of the invention) and provided as mirror images of each other. With many irregular shapes, the white spaces in the network will be oriented with 180 degrees of separation. In one application, instead of slanted sides or cuts, the cuts are curved and the core elements have curved contours. In a particular embodiment, the core elements are preferably S-shaped and the blanks in the network can either be symmetrical along the longitudinal centerline or the blanks are oriented with 180 degrees of separation. Again, each cut or side is common to both blanks and defines the corresponding sides of the blanks or adjacent core elements.
Figures 16A and 16B illustrate an exemplary method of laterally stretching a construction of core 1610 similar to that of figure 6B. This particular method uses a 1619 laterally stretched rectangular composite, such as that described in U.S. Patent Nos. 7,361,246 and 7,462,172 (both of which are incorporated herein by reference for all purposes, including part of this disclosure) (whose patents have one or more inventors in common with the present (s) ( s) invention / inventions). As described in these patent documents, the elastic composite 1619 can comprise at least one sheet of nonwoven or other substrate and a plurality of lateral elastics therein. In some embodiments, the elastic composite consists of elastics thoughtless between two layers of nonwoven, but it is also contemplated that, for the present purposes, only one layer of substrate may be necessary. The elastic composite 1619 is applied, under tension, to a core element 1611, preferably centrally using suitable adhesives or the like. Once released from tension, the elastic composite 1619 contracts laterally, thereby also contracting the core element 1611, attached below the elastic composite 1619. This contraction creates a narrowed central region MO of the resulting core construction 1610, as desired.
With regard to the modalities of figures 11A-11F, it is further contemplated that the longitudinally directed elastics 1119 can be applied to the network 1180 of the core element as a continuous filament. Sections of the continuous filament can be selectively cut to leave the intermittent series of elastics 1119 on the 1180 mesh. Alternatively, the continuous filament can be adhered to the core material in the tensioned state (for example, using glue or other suitable adhesive), then selected portions of the continuous elastic filament are deactivated. Released from tension, the once continuous elastic filament generates the intermittent series of contracted elastics 1119 and thus the desired curved lateral margins (from the network 118 0 and the resulting core elements 1111a, 1111b). Regarding the modalities of figures HE and 11F, the slits 1133 can be made immediately after the application of the continuous filament on the 1180 mesh.
The foregoing descriptions of various embodiments and aspects of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the various absorbent cores or articles, and to the disclosed processes. Various aspects of the invention are intended for applications other than diapers and training pants. The described core constructions can also be incorporated into or with other garments, textiles, fabrics and the like, or combinations thereof. The described core constructions can also incorporate different components. These and other variations of the invention will become apparent to the person skilled in the art of the relevant consumer product provided with the present disclosure. Therefore, variations and modifications proportionate to the above teachings, and the skill and knowledge of the relevant technique are within the scope of the present invention. The modalities described and illustrated here are still intended to explain the best ways to practice the invention, and to allow others skilled in the art to use the invention and other modalities and with various modifications necessary for the particular applications or uses of the present invention.

权利要求:
Claims (29)
[0001]
1. Disposable absorbent article (20) characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first end edge (212a), a second waist end region (213b) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b), and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the end (212a, 212b), the core (210) including superabsorbent particles and extending laterally over the groin region (214) and a plurality of elastics (619) which are generally extended laterally, spaced mutually longitudinally and connected to the first absorbent core element (211a), so that the first absorbent core element (211a) is contracted laterally in a narrow region of the first core element (211a) around the plurality of elastics (619); and wherein the absorbent core (210) has a shape that includes a pair of ends that are not elastic and have a side width wider than a side width of the narrowed region; wherein each of said pluralities of elastics (619) extends laterally from a location close to the lateral edge of the first core element (211a) in the narrowed region to a location close to an opposite lateral edge of the first core element ( 211a) in the narrowed region; and wherein the plurality of elastics (619) are arranged together in a concentration of elastics in a central region (205) of the first element of the core (211a) between the terminal regions (213a, 213b) and within the lateral margins of the first core element (211a) and where the elastics (619) are arranged in longitudinally spaced rows; and wherein the absorbent core (210) further includes a second core element (211b), said plurality of elastics (619) being arranged between said first core element (211a) and said second core element (211b) .
[0002]
2. Disposable absorbent article according to claim 1, characterized by the fact that the plurality of elastics (619) is longitudinally spaced and extends laterally between the lateral margins that extend longitudinally from the absorbent core (210) in the groin region (214).
[0003]
Disposable absorbent article according to claim 2, characterized in that the ends of the plurality of elastics (619) are positioned close to the lateral margins to provide a concavity in each said lateral margin close to the plurality of elastics (619) .
[0004]
Disposable absorbent article according to claim 1, characterized by the fact that the plurality of elastics (619) are placed within said absorbent core (210).
[0005]
5. Disposable absorbent article according to claim 1, characterized by the fact that the plurality of elastics (619) are placed, pre-tensioned, on a flat absorbent surface of the absorbent core (210).
[0006]
Disposable absorbent article according to claim 1, characterized in that the rows of said elastics (619) are arranged in the narrowed region in rows of variable pitch to define a curved shape to said narrowed region of the first core element (211a).
[0007]
Disposable absorbent article according to claim 1, characterized in that the rows of said elastics (619) are arranged in the narrowed region in rows of variable tension to provide a curved shape to said narrowed region.
[0008]
8. Disposable absorbent article according to claim 1, characterized in that the rows of said elastics (619) are arranged in the narrowed region in rows of varying shapes to achieve the shape of the absorbent core (210).
[0009]
Disposable absorbent article according to claim 1, characterized in that the rows of said elastics (619) are arranged in the narrowed region in rows of variable type to reach the shape of the absorbent core (210).
[0010]
Disposable absorbent article according to claim 1, characterized in that the rows of said elastics (619) are arranged in rows of variable length to reach the shape of the absorbent core (210).
[0011]
11. Disposable absorbent article (20) characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first end edge (212a), a second waist end region (213b) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including a first element of the absorbent core (211a) including superabsorbent particles and extending laterally through the groin region (214) and a plurality of elastics (619) which are generally extended laterally, spaced mutually longitudinally and attached to the first absorbent core element so that the first absorbent core element (211a) is contracted laterally in a narrow region of the first core element (211a ) around the plurality of elastics (619); and wherein the absorbent core (210) has a shape that includes a pair of end regions that are not elastic and have a side width wider than a side width of the narrowed region; and wherein the absorbent core (210) includes the first element of the core (211a) formed from materials that impart absorbent properties and a second element of the core (211b) formed from materials that impart absorbent properties, the second element of the core (211b) overlapping the first core element (211a) to form a multilayer primary absorbent region (250) of the absorbent core (210) having an absorption capacity per unit area increased by an absorption capacity per unit area in the regions end of the absorbent core (210); and wherein the multilayer absorbent region (250) substantially coincides with the narrowed region of the absorbent core (210); and wherein each of the first and second core elements (211a, 211b) includes a plurality of elastics (619) incorporated thereto to form a narrowed region of the respective core element; and wherein the narrow regions of the core elements are positioned adjacent to each other to substantially form the narrowed region of the absorbent core (210), wherein each of said plurality of elastics extends laterally from a location close to the lateral margin the respective core element in the narrowed region of the same to a location close to an opposite side margin of the respective core element in the narrowed region thereof; and wherein each of said plurality of elastics (619) is arranged together in a concentration of elastics in a central region of the respective core element between the terminal regions and within the lateral margins of the respective core element and in which the elastics they are arranged in longitudinally spaced rows; and wherein the narrow regions of the main elements are located to provide a laterally contracted primary absorbent region; and wherein the second core element (211b) includes slits (873) that provide voids that penetrate through the second core element (211b) into the primary absorbent region substantially contracted laterally.
[0012]
12. Disposable absorbent article (20) characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first end edge (212a), a second waist end region (213b) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including a first element of the absorbent core (211a) including superabsorbent particles and extending laterally through the groin region (214) and a plurality of elastics (619) which are generally extended laterally, spaced mutually longitudinally and attached to the first element of the absorbent core (211a) so that the first element of the absorbent core (211a) is contracted laterally in a narrow region of the first element the core (211a) around the plurality of elastics (619); and wherein the absorbent core (210) has a shape that includes a pair of end regions that are not elastic and have a side width wider than a side width of the narrowed region; wherein each of said pluralities of elastics (619) extends laterally from a location close to the lateral edge of the first core element (211a) in the narrowed region to a location close to an opposite lateral edge of the first core element ( 211a) in the narrowed region; and wherein the plurality of elastics (619) is arranged together in a concentration of elastics in a central region of the first element of the core (211a) between the ends and within the lateral margins of the first element of the core (211a) and in which the elastics (619) are arranged in longitudinally spaced rows; and wherein said plurality of elastics (619) is adhered to the first element of the absorbent core (211a) in a plurality of adhesion locations positioned and spaced along the length of each elastic of said plurality of said elastics (619) adhered to the first element of the absorbent core (211a) to form a plurality of laterally spaced grooves (P) in the first element of the core (211a) between the attachment sites.
[0013]
Disposable absorbent article according to claim 12, characterized in that the adhesion sites associated with each elastic are longitudinally aligned with adhesion sites on others of the plurality of elastics (619) to form a plurality of sets of locations adhesion lines aligned longitudinally and spaced laterally forming grooves (P) that are extended longitudinally and spaced laterally between sets of adhesion sites.
[0014]
Disposable absorbent article according to claim 13, characterized in that the grooves (P) are spaced to form a plurality of empty spaces (S0) that extend longitudinally below said grooves (P) and a plurality of channels (C1) between the grooves spaced laterally.
[0015]
Disposable absorbent article according to claim 14, characterized in that the absorbent core (210) further includes a second element of the absorbent core (211b) placed below the first element of the absorbent core (211a) and the plurality of elastic (619).
[0016]
16. Disposable absorbent article, characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first edge edge (212a), a second waist end region (213b ) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including a first element of the absorbent core (211a) including superabsorbent particles and extending laterally through the groin region (214) and a plurality of elastics (619) incorporated with the first element of the core; and wherein said plurality of elastics (619) is adhered to the first element of the core (211a) in a plurality of adhesion positions positioned and spaced along the length of each elastic of said plurality of elastics (619) adhered to the first element the core (211a) to form a plurality of grooves (P) spaced on the first element of the core (211a) between the attachment sites; and wherein the adhesion sites associated with each elastic are aligned with the adhesion sites on other elastics of said plurality of said elastics (619) adhered to the first element of the core to form a plurality of spaced sets of adhesion sites that form grooves (P) which are extended and spaced between sets of adhesion sites; and wherein the absorbent core (210) further includes a second element of the absorbent core (211b) placed below the first element of the absorbent core (211a) and the plurality of elastics (619) incorporated thereto, the second element of the absorbent core ( 211b) including a plurality of elastics (619) incorporated therein, each of the plurality of elastics (619) forming a narrowed region of the respective absorbent core element, wherein the narrow regions of the central elements are positioned adjacent to each other to form substantially a narrowed region of the absorbent core (210).
[0017]
17. Disposable absorbent article according to claim 16, characterized in that the absorbent core (210) further includes a layer of material (639) positioned below the first element of the core (211a) and the plurality of elastics (619 ) incorporated in it and a second layer of material (639) positioned below the second element of the core (611b) and the plurality of elastics incorporated in it.
[0018]
18. Disposable absorbent article according to claim 16, characterized by the fact that the elastics of each of the plurality of elastics (619) are spaced longitudinally and include places of adhesion that are aligned longitudinally to form grooves (P) extend longitudinally and spaced laterally.
[0019]
19. Disposable absorbent article according to claim 16, characterized in that the projections are spaced to form a plurality of empty spaces (S0) that extend longitudinally below the grooves (P) and a plurality of channels (C1) between the laterally spaced grooves (P).
[0020]
20. Disposable absorbent article according to claim 16, characterized in that said plurality of elastics (619) of said second core element (211b) includes elastics adhered to it in a plurality of adhesion sites, and in that the places of adhesion of the second element of the core (211b) associated with each said elastic are aligned longitudinally with places of adhesion of the second element of the core (211b) on others of said elastics in the plurality of elastics (619) of the second element of the core (211b) to form a plurality of longitudinally aligned and laterally spaced assemblies of adhesion sites of the second core member (211b) forming grooves (P) which are extended longitudinally and spaced laterally between sets of adhesion sites of the second core member (211b).
[0021]
21. Disposable absorbent article according to claim 16, characterized in that said plurality of elastics (619) incorporated with the first element of the core (211a) and said plurality of elastics (619) incorporated with the second element of the core (211b) are respectively adhered to said first and second core elements (211a, 211b) at said attachment sites.
[0022]
22. Disposable absorbent article according to claim 21, characterized in that a plurality of grooves (P) is formed in the second element of the core (211b), so that a plurality of empty spaces (S0) are mutually spaced and spaced apart is formed between the core elements.
[0023]
23. Disposable absorbent article according to claim 22, characterized in that each of the said voids (S0) is formed between a groove in the first element of the core (211a) and a corresponding groove (P) in the second element of the nucleus (211b) that protrudes in a direction away from the first element of the nucleus (211a).
[0024]
24. Disposable absorbent article, characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first edge edge (212a), a second waist end region (213b ) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including a first element of the absorbent core (211a) and a plurality of elastics (619) connected to the first element of the core ( 211a); and a second element of the absorbent core (211b) and a plurality of elastics (619) attached to the second element of the core (211b), the first and second elements of the core (211a, 211b) being overlapped to provide a narrower region of the absorbent core in the groin region (214); wherein for each element of the core, an elastic band of said plurality of elastics (619) of the core element extends longitudinally along a lateral margin of the core element and is arranged in a central region of the core element to form a hollow in the core element, in which the central region of the first and second core elements (211a, 211b) and their concavities provide, at least partially, the narrowed region, in which the longitudinally extending concavities and elastics are located in portions of the narrowed region outside a portion provided by overlapping portions of the first and second central elements; and wherein each of said plurality of elastics of each element of the core is arranged incorporated with the respective element of the core and within the opposite lateral margins of the respective element of the core.
[0025]
25. Disposable absorbent article (20), characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first end edge (212a), a second end region waist (213b) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including at least one element of the absorbent core (211a), including superabsorbent particles and imparting absorbent properties, and extending laterally through groin region (214), and a plurality of spaced elastics (619), incorporated into the core element (211a) and attached to the absorbent core element (211a) so that the absorbent core element (219) is contracted laterally in a narrowed region of the core element around the plurality of elastics (619); and wherein said plurality of elastics (619) is adhered to the core element (211a) in a plurality of adhesion positions positioned and spaced along the length of each elastic of said plurality of elastics (619) adhered to the core element (211a) to form a plurality of grooves (P) spaced on the core element in between places of adhesion; and wherein the adhesion sites associated with each elastic are aligned with the adhesion sites on other elastics of said plurality of elastics (619) adhered to the core element (211a) to form a plurality of spaced sets of adhesion sites that form grooves (P) that are extended and spaced between the locations of adhesion assemblies; and an upper layer (902) disposed on the absorbent core (210), so as to form voids (S0) and spaced apart between the upper layer (902) and the absorbent core (210).
[0026]
26. Disposable absorbent article (20), characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first end edge (212a), a second end region waist (213b) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including at least one element of the absorbent core (211a), including superabsorbent particles and imparting absorbent properties, and extending laterally through groin region (214), and a plurality of spaced elastics (619), incorporated into the core element (211a) and attached to the absorbent core element (211a) so that the absorbent core element (219) is contracted laterally in a narrowed region of the core element around the plurality of elastics (619); and and wherein the absorbent core (210) has a shape that includes a pair of end regions that are not elastic and have a side width wider than a side width of the narrowed region; wherein each of said pluralities of elastics (619) extends laterally from a location close to the lateral edge of the first core element (211a) in the narrowed region to a location close to an opposite lateral edge of the first core element in the narrowed region; and wherein the plurality of elastics (619) is arranged together in a concentration of elastics in a central region of the first element of the core (211a) between the ends and within the lateral margins of the first element of the core (211a) and in which the elastics (619) are arranged in longitudinally spaced rows; and wherein the rows of said elastics are arranged in the narrowed region in rows of variable pitch to define a curved shape to said narrowed region of the first core element (211a).
[0027]
27. Disposable absorbent article according to claim 26, characterized in that the absorbent core (210) further includes a second element of the core (211b), said plurality of elastics (619) disposed between said first element of the core (211a) and said second core element (211b).
[0028]
28. Disposable absorbent article, characterized by the fact that it comprises: a central body (205) that defines a first waist end region (213a) including a first end edge (212a), a second waist end region (213b ) spaced longitudinally from the first waist end region (213a) and including a second end edge (212b) and a groin region (214) positioned between them; and an absorbent core (210) located between the edges of the ends (212a, 212b), the absorbent core (210) including at least one element of the absorbent core (211a), including superabsorbent particles and imparting absorbent properties, and extending laterally through groin region (214), and a plurality of spaced elastics (619), incorporated into the core element (211a) and attached to the absorbent core element (211a) so that the absorbent core element (219) is contracted laterally in a narrowed region of the core element around the plurality of elastics (619); and wherein the absorbent core has a shape that includes a pair of ends that are not elastic and have a side width wider than a side width of the narrowed region; wherein each of said pluralities of elastics extends laterally from a location close to the lateral edge of the first core element (211a) in the narrowed region to a location close to an opposite lateral edge of the first core element in the narrowed region; and wherein the plurality of elastics (619) is arranged together in a concentration of elastics in a central region of the first element of the core (211a) between the ends and within the lateral margins of the first element of the core and where the plurality of elastics (619) is arranged in longitudinally spaced rows; and wherein the plurality of elastics is placed within said absorbent core (210).
[0029]
29. Disposable absorbent article according to claim 28, characterized in that the absorbent core (210) includes the first core element (211a) formed from materials that impart absorbent properties and a second core element (211b ) formed from materials that impart absorbent properties, the second element of the core overlapping the first element of the core (211a) to form a primary absorbent multilayer region (250) of the absorbent core having an absorption capacity per unit area increased by one absorption capacity per unit area in the final regions of the absorbent core; and wherein the multilayer absorbent region substantially coincides with the narrowed region; and wherein each of the first and second core members (211a, 211b) includes a plurality of elastics incorporated therein to form a narrowed region of the respective core member; and wherein the narrow regions of the core elements are positioned adjacent to each other to substantially form the narrowed region of the absorbent core.

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同族专利:

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公开号 | 公开日

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SG10201407001TA|2014-11-27|

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CN102695483B|2016-05-25|

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CN102695483A|2012-09-26|

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AU2010315930A1|2012-06-14|

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MX2012005032A|2012-08-03|

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AU2016203780A1|2016-06-30|

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CA2779269C|2019-01-08|

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EP2493440A1|2012-09-05|

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US11110012B2|2021-09-07|

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CN106389012B|2020-04-14|

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US20220031525A1|2022-02-03|

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US8702671B2|2014-04-22|

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SG10201804504SA|2018-07-30|

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US20140213997A1|2014-07-31|

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EP2493440B1|2020-01-01|

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EP2493440A4|2013-11-20|

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CN106389012A|2017-02-15|

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CA2779269A1|2011-05-12|

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BR112012010226B8|2021-06-22|

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US20170224548A1|2017-08-10|

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AU2018229518A1|2018-10-11|

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US20110130736A1|2011-06-02|

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AU2018229518B2|2019-09-26|

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MY161858A|2017-05-15|

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WO2011056205A1|2011-05-12|

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BR112012010226A2|2017-07-11|

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US9603754B2|2017-03-28|

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法律状态:
2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-07-16| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|

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2020-11-03| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-01-05| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 05/01/2021, OBSERVADAS AS CONDICOES LEGAIS. |

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2021-06-22| B16C| Correction of notification of the grant [chapter 16.3 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/10/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO |

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2021-09-21| B16C| Correction of notification of the grant [chapter 16.3 patent gazette]|Free format text: REF. RPI 2609 DE 05/01/2021 QUANTO AO INVENTOR (ITEM 72). |

优先权:

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申请号 | 申请日 | 专利标题

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US27992309P| true| 2009-10-28|2009-10-28|

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US61/279,923|2009-10-28|

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PCT/US2010/002858|WO2011056205A1|2009-10-28|2010-10-28|Disposable absorbent article with profiled absorbent core|

---