method of making elasticized absorbent pants and disposable elasticized absorbent article in the for

专利摘要:
METHOD OF MANUFACTURING ELASTIFIED ABSORBENT TROUSERS, METHOD OF MANUFACTURING AN ELASTIC COMPOSITE FABRIC AND DISPOSABLE ELASTIFIED ABSORBENT ARTICLE IN THE FORM OF ABSORBENT PANTS A method is described for making an elasticized absorbent article having a waist opening and a pair of leg openings. First, multiple distributions of elastics are applied to a sheet of moving material to form a moving fabric of an elastic composite. Then, each of a central section and a second sheet of material is periodically applied over the moving fabric to define a finished fabric of different elastic composite bodies. In the subsequent steps, different absorbent pants articles are modeled after the finished fabric.
公开号:BR112013006267B1
申请号:R112013006267-3
申请日:2011-09-16
公开日:2021-01-12
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:

[0001] [001] This application claims the benefit of United States provisional application 61 / 403,488, filed on September 16, 2010 (pending), the disclosure of which is incorporated into this document by reference for all purposes and made a part of this disclosure.
[0002] [002] The present invention relates in general to an elastic composite and to a disposable absorbent article incorporating an elastic composite. The invention also concerns elastic composite fabrics and suitable systems and methods for making them. Aspects of the invention are particularly suitable for disposable or related absorbent articles, such as baby diapers, training pants for children and young children, and adult incontinence diapers and pants. Specific embodiments of the invention may provide an elastic composite fabric, a composite body or elastic body, or elastic distribution patterns within these products, which, in turn, can improve the fit and comfort of the product, its support and sealing capabilities, improve the cost and ease of manufacturing the product and / or improving the aesthetic qualities of the product.
[0003] [003] Disposable absorbent articles considered by the invention include training pants, dressing diapers, disposable underwear and adult incontinence clothing. As for training pants, these garments are worn by children to facilitate the child's transition from wearing diapers to regular underwear (ie during toilet training). Training pants and other disposable dress pants have the sides closed in such a way that the wearer or healthcare professional pulls the garment up over the wearer's legs to wear the garment and slides the garment down over the user’s legs to remove it. These articles and clothing are referred to collectively in this document as "absorbent pants" or "pants products".
[0004] [004] Elastic elements can be incorporated into different parts of an absorbent article of clothing. For example, elastic elements can be positioned longitudinally along a diaper, generally outside the absorbent central part to effect a seal around the buttocks, legs or both of the users. In addition, various elastic elements (for example, in the form of elongated elastic threads or threads) can be positioned laterally across all waist regions (including side waist regions) of an absorbent article of clothing. The resulting elasticity allows the garment to stretch when it is worn and when it is worn. The elasticity allows the garment to accommodate variations in the user's waist size and leg size, while fitting tightly around the waist and legs.
[0005] [005] When elastic elements are incorporated into a part or area of an absorbent article of clothing, that part or area typically becomes a distinct functional component of the article of clothing. These elastic components include the side panels or ear pieces, the brace and fixing tabs. Because of part of their multi-component construction, elastic composites may require a dedicated sub-process for manufacturing that must be accommodated by the larger garment manufacturing process. Alternatively, the elastic composite can be manufactured independently or simply, manufactured in a sub-process separate from the central garment manufacturing system. In any case, a source of the elastic composite can be provided as input to the garment manufacturing process.
[0006] [006] In many applications, the elastic composite has a significant impact on the shape and sealing ability of the garment, as well as on the overall appearance and build quality of the garment. The design and construction of the elastic composite can also represent a significant part of the cost of manufacturing the garment. Therefore, it is desirable to provide a functionally and / or aesthetically improved elastic composite or a reduced cost system and method for manufacturing the elastic composite.
[0007] [007] United States Patents Nos. 7,462,172 and 7,361,246 provide prior information regarding elastic composites (and the manufacture of such composite bodies) of a type relevant to the present invention. Accordingly, these patent publications are also incorporated into this application by reference and made part of this disclosure, but only to the extent that the subject matter incorporated provides prior information and / or composite bodies and exemplary processes suitable for use in present composite bodies, inventive systems and methods or use with them. Thus, the subject matter incorporated should not serve to limit the scope of the present invention. It should be noted that, while these earlier patent publications provide some discussion regarding the manufacture of elastic composites and then incorporate them into absorbent articles, the present invention, in one aspect, is directed more particularly to provide an improved system and method for manufacturing an elasticized absorbent article and / or a fabric of elastic composite bodies. More specifically, a directive of the present invention is to provide a method and system by which and in which the elastic composite and its formation are seamlessly integrated into the method of manufacturing the article and the elastic article itself. SUMMARY OF THE INVENTION
[0008] [008] For the purposes of this description, the expressions "elastic composite", "elastic composite body", and "elastic material" refer to a multi-layer or multi-component construction that incorporates elastomeric material (s) or elastic element (s). In this construction, a plurality of elastic elements, such as fillets or threads, are connected or disposed adjacent to one or more materials, for example, lower layer and upper layer. In this way, the elastic elements transmit elasticity to the connected or adjacent layers and thus to that part of the article or garment. Such an elastic structure can be a fixable component other than the garment or garment, or it can be a separate part or section of the garment body or a larger unitary component of the garment.
[0009] [009] Additionally, as used in this document, the term "fabric" refers to an extended transportable net or blade. The term "substrate" refers to a fabric, blade or backing layer, such as a fabric or bottom layer, on which rubber bands adhere or are otherwise supported. In addition, a fabric may be of an elastic composite and / or provide a plurality or series of distinct elastic composite bodies. In embodiments described in this document, such elastic composite bodies can be separated from the fabric to form the basis of a disposable absorbent article such as an absorbent diaper or pants.
[0010] [010] In one aspect of the present invention, a disposable elasticized absorbent article is provided in the form of absorbent pants. Absorbent pants include an elastic composite body, a lower layer, an upper layer, an absorbent central part between the lower layer and the upper layer, and multiple elastic distributions between the upper layer and the lower layer. In addition, the elastic composite body has a leading edge edge, a trailing edge edge, and two edge edges, each having an upper segment, a lower segment and a non-linear cutout section between them. The absorbent article also includes a waist opening defined by the edge edges, a pair of leg openings, each defined, at least partially, by the cut-out section of one of the edge edges, and a pair of side joints, each one defined by a union of the upper and lower segments of one of the edges of lateral parts. The elastic distributions are substantially joined at the side junctions to form a substantially annular elastic region around each leg opening.
[0011] [011] In additional embodiments, the elastic composite body also includes a pair of elastic distributions joined at the side junctions to form a substantially annular elastic region around the waist opening. Preferably, the elastic composite body further includes a pair of elastic distributions, each extending through the composite body and joining substantially to the other at the side joints to form the substantially annular elastic region around the leg opening.
[0012] [012] In another aspect of the invention, a method of making elasticized absorbent pants preferably begins by applying multiple distributions of elastics to a sheet of moving material to form a moving fabric of an elastic composite. Each of a central section and a second sheet of material is periodically applied over the moving fabric to define a finished fabric of different elastic composite bodies. The steps resulting from the delivery of a finished fabric of different elastic composite bodies can be referred to as the step of joining the elements or layers of the target elastic composite fabric. In a subsequent step, pants or different absorbent articles are modeled after the finished fabric. The modeling step may include joining each of a lower half and an upper half of each composite body to form a plurality of substantially continuous elastic distributions in the elastic composite body. In an additional embodiment, the joining step forms annular elastic regions around a waist opening and / or each of a pair of leg openings. In additional embodiments, the joining step is preceded by the step of folding the finished fabric along a longitudinal central line and the joining step includes sealing the two halves along two side joints to define at least one waist opening. In another embodiment, the joining step is preceded by the step of periodically cutting a cut section of the finished fabric in a location adjacent to adjacent elastic composite bodies in such a way that, after the joining step, each lateral contour of the elastic composite body consists of a junction of side parts and the cutout section. The modeling step additionally includes cutting the finished fabric along a cut line bisecting the cutout sections. In a more preferred embodiment, the joining step precedes the cutting step so that the cutting step immediately produces elastic absorbent pants having a waist opening, a pair of leg openings and multiple distributions of continuous elastics extending through two side sealing lines or side joints.
[0013] [013] According to another aspect of the invention, a method of making an elastic composite fabric, from which elastic composite bodies of absorbent pants can be separated, begins with the steps of transporting a continuous sheet of material and applying multiple continuous distributions of elastics to the continuous blade in motion to form an elastic composite fabric, the elastic distributions generally extending in the machine direction. The method also entails periodically applying a central section to the moving elastic composite fabric and then continuously applying a sheet of material superior to the fabric including the central sections. In the step of applying continuous elastic distributions, at least two periodic elastic distributions are established on the moving fabric by varying the lateral position of the elastic distribution as the distributions are advanced in the machine direction of the elastic composite moving fabric. In additional embodiments, the step of applying continuous distributions includes periodically varying the lateral position of the elastic distribution before engaging with the sheet of material, and also additionally periodically varying the lateral position to establish two patterns of elastic distribution on the moving fabric. elastic composite that periodically trace an annular elastic region. In additional embodiments, the method includes a step of periodically cutting one or more of the elastic distributions in order to pre-locate gaps in the elastic distribution on the moving composite fabric. In additional embodiments, each of the elements or layers of a fabric of elastic composite bodies is delivered in line or in the machine direction, and additionally in or around a station or laminator joining the system.
[0014] [014] In another aspect of the present invention, a system and process are provided to deliver a fabric of elastic composite bodies. The system and process provide a central forming region or joint laminator that receives all elements or layers of the target elastic composite and joins these elements according to a specific sequence. Preferably, all such elements are introduced into the laminator and received in the machine direction. The exit of the joining step is a fabric of elastic composite bodies that can be further manipulated to reach a series of disposable absorbent articles. Post-joining steps may include bending, sealing and / or cutting the elastic composite bodies. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] [015] In order that the manner in which the features and advantages of the present invention can be understood in more detail, a more particular description of the invention set out briefly above can be made by reference to the modalities of it that are illustrated in the accompanying drawings form a part of this specification. It is to be noted, however, that the drawings illustrate only several exemplary modalities of the invention and, therefore, are not to be considered as limiting the scope of the invention as it may also include other effective modalities.
[0016] [016] Figure 1A is a simplified isometric view of a disposable absorbent article according to the present invention; Figure 1B is a cross-sectional view of an elastic composite or elastic composite fabric according to the present invention; Figure 2A is a simplified diagram in side view of a system or apparatus for manufacturing an elastic composite or elastic composite fabric according to the present invention; Figure 2B is a plan view of the system in figure 2A; Figure 2C is a graph of an exemplary periodic function reflecting directional lateral movement by means of elastic guides in Figures 2A-2B to produce a double elastic distribution pattern in an elastic composite fabric, in accordance with the present invention; Figure 3 is a simplified illustration of an elastic composite fabric according to the present invention; Figure 4 is a simplified illustration of a fabric-based process for making the disposable absorbent article in Figure 1, according to the present invention; Figure 4A is a simplified illustration of a fabric-based process for making an alternative disposable absorbent article according to the present invention; Figure 5 is a simplified illustration of a fabric-based process for making a disposable absorbent article, according to an alternative embodiment of the present invention; Figure 6 is a simplified scheme of a system for making the disposable absorbent article in Figure 1, according to the present invention; Figure 7 is a simplified illustration of an elastic composite fabric employed in a fabric-based process for making a disposable absorbent article in accordance with the present invention; Figure 7A is a simplified isometric view of a disposable absorbent article according to an alternative embodiment of the present invention; Figure 8 is a simplified illustration also of another alternative elastic composite fabric according to the present invention; Figure 8A is a simplified isometric illustration of another disposable absorbent article according to an alternative embodiment of the present invention; Figure 9 is a simplified illustration also of another alternative elastic composite fabric according to the present invention; Figure 9A is a simplified isometric illustration of another disposable absorbent article also according to another alternative embodiment of the present invention; Figure 10 is a simplified schematic representation of a system for making a disposable absorbent article according to the present invention; Figure 10A is a cross-sectional view of a fabric of elastic composite bodies according to the present invention; Figure 10B is a cross-sectional view of an alternative fabric of elastic composite bodies according to the present invention; Figures 11A-11B are simplified illustrations of an elastic composite body, also according to another alternative embodiment of the present invention; Figure 12A is a simplified illustration of an elastic composite fabric having patterns of double elastic distribution applied thereon, according to an embodiment of the present invention; Figure 12B is a graph of a periodic function reflecting directional lateral movement by means of elastic guides to produce the patterns of double elastic distribution in the elastic composite fabric of Figure 12A; Figure 13 is a flow chart for a method of making an elasticized absorbent article, according to an embodiment of the present invention; Figure 14 is a flow chart for a method of making an elastic composite fabric, according to an embodiment of the present invention; Figure 15A is a simplified isometric view of a disposable absorbent article according to an alternative embodiment of the present invention; Figure 15B is a simplified illustration of a fabric of elasticized composite bodies from which the article in Figure 15A is derived; Figure 16A is a simplified isometric view of a disposable absorbent article according to an alternative embodiment of the present invention; Figure 16B is a simplified illustration of a fabric of elasticized composite bodies from which the article in Figure 16A is derived; Figure 17 is a simplified illustration of a system and process of applying elastic distributions to a fabric of elastic composite bodies, in accordance with the present invention; and Figure 18 is a simplified illustration of an elasticized core structure achievable by the system and process according to the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0017] [017] The present invention will now be described more fully with reference to the accompanying drawings, which illustrate several exemplary embodiments. The invention, however, can be incorporated in many different forms and should not be construed as being limited by the illustrated modalities set out in this document. Instead, these modalities are provided in such a way that this disclosure is complete and thus will fully convey the scope of the invention to those skilled in the art and the best and preferred ways of practicing the invention. For example, a large part of the exemplary descriptions provided in this document are related to training pants for children and young children. Aspects of the described invention, however, can be equally applicable to designs for baby diapers, adult incontinence products and other similar products and the manufacture thereof.
[0018] [018] Figure 1A illustrates a first embodiment of the present invention, in the form of disposable absorbent training pants 101. The upright absorbent pants 101 is formed of an elasticized composite body 136 with a first or front half turned around symmetrical line to join a substantially identical second or rear half. The two halves are joined in a pair of sealed side joints 130. Each side joint 130 consists of a first or bottom segment of a side edge 106 joined to a second or top segment of the same side edge 106 (as will be explained further below) ). The resulting absorbent pants 101 have a front longitudinal waist edge 102, a rear longitudinal waist edge 103, and a pair of sealed joints or side lines 130, each on a side of absorbent pants 101. To facilitate the present description of invention, the trouser body 136 is sometimes described as having an upper waist region 124 and a lower waist region, legs and crotches (the lower region 126). The absorbent pants configuration 101 is also provided with an absorbent fluid storage and distribution core 105 inside the pants 101 and around a crotch region 134. In one aspect of the invention, the formation of the two gasket seals side portions 130 immediately creates the absorbent pants configuration 101. This absorbent pants configuration 101 includes a waist opening 132 defined by the joining of the two waist edges 103 to complete a continuously surrounding waist edge. The pants configuration 101 additionally includes the two leg openings 104 formed by the joining of the halves (as will also be explained further below).
[0019] [019] The pants configuration 101 also includes side part joints 130. Side joints 130 can be provided by means of a permanently joined seal or a resealable seal. A permanent side seal can be achieved, for example, through the use of adhesive bonding, thermal bonding, ultrasonic bonding or any other suitable bonding mechanism. A resealable side seal can be achieved through the use of adhesives, hook and loop materials or other mechanisms capable of being reseated.
[0020] [020] To improve the comfort and fit of the absorbent article, as well as its ability to contain fluid and minimize the occurrence of fluid leakage through the waist and leg openings 132, 104, the disposable absorbent article 101 is provided with the materials strategically placed elastomers 120. In a preferred embodiment, these elastomeric materials consist of elastic tapes or threads such as natural rubber, latex threads or synthetic elastomers such as Lycra or Spandex threads. Other suitable elastomeric materials include, but are not limited to, stretch elastomeric films, elastomeric tapes, elastomeric nonwoven fabrics and elastomeric adhesives. For the purposes of this description, any discussion of elastomeric materials will be confined to the use of elastomeric filaments or threads, which can be referred to as elastic or elastic threads. It will be apparent, however, that these elastomeric materials can be readily replaced by many other types of elastomeric materials.
[0021] [021] The absorbent pants 101 in figure 1 incorporate multiple distributions of the elastic threads 120 in the upper waist region 124 and in the lower waist, legs and crotch regions (the lower region 126). These distributions of elastic threads make the composite body 136 strategically located and advantageously configured. By sealing the side edges 106, this feature directly and promptly translates to the resulting absorbent pants 101 and at the end to pants 101 as used by the user. In this way, the pants 101 of the invention can be referred to as a disposable elasticized absorbent article 101. To improve, each of the elastic distributions in the absorbent pants 101 defines a substantially annular or elastic area or region of elastics. In the upper waist region 124, a set or distribution 110 of the elastic threads 120 is arranged generally circumferentially around the waist opening 132 and just below the joined waist edges 102, 103, and thus encircles the user's waist. Preferably, the elastic yarns 120 are spaced mutually side by side and generally parallel to the waist edges 102, 103. In this way, the absorbent pants 101 are equipped with a particularly advantageous annular region of elastics and with elasticity firmly surrounding the waist the user, and acting to effectively seal the waist opening 132. In the lower region 126, multiple distributions of the elastic threads 120 extend substantially completely around the leg openings 104 and the crotch region 134. A set or distribution 111 of the elastic threads 120 surround the leg opening 104 and form an elastified annular area or region nearby. A third area or elastic annular region in general is positioned centrally in the crotch region 134.
[0022] [022] The elastic annular regions around the waist opening and leg openings are advantageously maintained substantially completely around the sealing object (i.e., the potential opening between the waist and the waist edge 102, 103 and the potential openings between the thigh and the circular lateral edge of Article 101). In addition, the intensity and direction of the elastic forces are generally kept uniform around the openings. More effective and more reliable sealing is achieved because all potential leakage points around the opening are addressed. Uniformity in elasticity around the waist or thigh also helps to prevent irregular fit, which can result in an under seal. Notably, the elastic distributions 110, 111 in the composite body 136 extend substantially completely from one side edge to the opposite side edge (as explained below) and, by forming the pants configuration 101, extend substantially in shape continuous (without ends) around article 101. It must be understood, however, that the elastics of the annular regions do not necessarily have to touch or overlap. It is sufficient that the ends of elastics are close to opposite ends in order to obtain elasticity in a generally uniform manner around the object or sealing edge, substantially similar to a real elastic ring placed there.
[0023] [023] It should be noted that the elastic threads 120 around the leg opening 104 can overlap in the crotch region 134. It should also be noted that the elastic threads 120 in the upper and lower regions 124, 126 are not necessarily mutually exclusive and threads elastic bands in one region can overlap and cross elastic threads in the other region.
[0024] [024] In one aspect of the present invention, the disposable absorbent article 101 having one or more annular regions of elastic or elasticity can be manufactured using a single unitary elastic composite body 136 (or prior to manufacturing the pants configuration 101, simply the elastic composite 136). Figure 1B is a cross-sectional view of an exemplary elastic composite 136 specifically for the absorbent pants 101 of Figure 1B. Among other things, this view shows the multiple distributions of the elastic threads 120 in the elastic composite 136 used in the absorbent pants 101 according to the present invention. The elastic composite 136 has a first or lower edge 102 and a second or upper edge 103 (which at the end define the waist edges 102, 103 in the pants configuration 101). The composite bodies 136 also have a fluid-impermeable outer layer 107, an optional intermediate layer 108, a fluid distribution and storage core 105 and a fluid-permeable top layer 109. The fluid-impermeable bottom layer 107 can be selected from a range of materials that include hydrophobic, fluid impervious nonwoven materials, breathable and non-breathable polyethylene films or laminates of these materials. The optional intermediate sheet layer 108 may also include hydrophobic, fluid impervious nonwoven materials, breathable and non-breathable polyethylene films, and laminates of said materials or other suitable materials. As shown in figure 1B, the two layers of sheets 107, 108 help to hold the elastic distributions 110, 111 in place, although, in some embodiments, the elastic distributions are glued only to the surface of the lower layer 107. The construction or absorbent core for distribution and storage of fluid 105 may be composed of non-woven materials, films with openings, fabric, cellulose fluff pulp, superabsorbent polymer particles or fibers or any other materials that can be used to distribute and absorb the fluid and solid insults passed into the article when it is used. In addition, the fluid-permeable top layer 109 may comprise a hydrophilic, fluid-permeable non-woven fabric or an openable material.
[0025] [025] For the absorbent pants 101 of figure 1, the exemplary elastic composite 136 reveals a first distribution 110 of the elastic threads 120 directed along each of the first edge 102 and the second edge 103. In this embodiment, a grouping of six wires 120 spaced side by side in general is placed together along edges 102, 103, while three individual wires 120 are placed into these wires 120. The spacing between the three individual wires 120 is greater than that of the first six wires 120. This spacing of wires 102, 103 corresponds to the spacing of wires 120 in the upper region 124 of the disposable absorbent article 101 of figure 1A which concentrates elasticity near the edges 102, 103. The elastic composite 136 also characterizes the two other distributions 111 of the elastic threads 120. Two distributions 111 with five threads 120 each are laid inwardly from the two outside distributions 110, as shown in figure 1B. As will be described further below, these two distributions 111 correspond to the elastic distributions 111 around the leg openings 104 and in the crotch region 134 of the disposable absorbent article 101.
[0026] [026] The simplified illustrations of figures 2A and 2B describe a system 150 and method for manufacturing a fabric 240 of elastic composite 136. More specifically, system 150 and method are used to incorporate the desired elastic distributions 110, 111 described previously in an elastic composite 136 and a composite fabric 240 (and at the end, an absorbent article 101), according to the invention. The illustrated method provides an initial sub-process for making the elastic composite 136 and the disposable absorbent article 101 in figure 1. Figure 4 illustrates the subsequent and remaining stages in this method. Both figures 3 and 4 depict a unitary elastic composite fabric 240 which is particularly suitable for making disposable absorbent articles 101. As will be described, composite fabric 240 can contain and present four continuous distributions directed by a machine of elastic threads that trace a specific advantageous pattern. At least two of the distributions are described by a periodic function featuring a channel and a peak. The other two distributions are preferably maintained along a straight path.
[0027] [027] Referring now to Figures 2A and 2B, the inventive system 250 and method transport, attach and manipulate an elastic composite fabric 240 in a substantially linear process and in the machine direction. For purposes of description, fabric 240 is referred to as having a first or bottom edge 202, a second or top edge 203 spaced next to the first edge 202 in the machine transverse direction and generally parallel to it, a width transverse to the machine defined between the two edges 202, 203, and a longitudinal center line YY. In some descriptions, the machine's transverse direction through fabric 240 and components supporting the inventive fabric 240 can be referred to as a side direction, while the machine direction can be described as corresponding to a longitudinal direction. Preferably, the elastic composite fabric 240 is advanced at a uniform rate of speed in the longitudinal or machine direction.
[0028] [028] In a preferred embodiment, the method initially requires separate and continuous transport of each of the six elements of the elastic composite 136 to a joint mechanism such as a press roller 218 (see, for example, figure 2A). These elements include a first sheet of material 212, a second sheet of material 213, a first set 210a of pre-tensioned elastic threads along the top edge 203, and a second set 210b of pre-tensioned elastic threads along the bottom edge 202. The first and second sets 210a, 210b of elastic threads are aligned in mutually parallel alignment, but spaced side by side specifically according to a predetermined arrangement. In this specific embodiment, the first and second sets 210a, 210b are mirror images of each other. In addition, two other sets 211a, 211b of pretensioned elastic yarns are carried along a machine direction laterally into the first and second sets 210a, 210b of pretensioned elastic yarns. As best shown in Figure 2A, both the first and second sets 210, 211 of elastic bands are preferably introduced and carried in the direction of the press roller 218 along the horizontal plane of the fabric 140. The two sets in 211a, 211b of elastics they are also introduced into the same fabric plane. The two sheets of material 212, 213, on the other hand, are preferably started from the plane in general above and below the fabric, respectively (hence, sometimes referred to as fabrics or sheets of upper and lower material).
[0029] [029] Elastic wires can be received in a tensioned state using any suitable tensioning and feeding device positioned upstream of this process (not shown). The initial lateral positions of the elastic yarns, as well as the spacing between adjacent elastic yarns, are initially fixed by the elastic guides 215. These fixed elastic guides 215 are mounted on two rods 219, as shown in figures 2A and 2B. The elastic guides 215 typically comprise rollers, eyelets or any other devices suitable for carrying and guiding the pre-tensioned elastic threads. A second set of elastic guides 216a, 216b is mounted on the movable rods 221 downstream of the fixed rods 219. Each of these two movable elastic guides 216a, 216b fits with one of the two inner sets 211a, 211b of elastic wires. Preferably, the movable rods 221 and the movable guides 216a, 216b are positioned above and below the fabric plane, respectively. Thus, while a first set of elastic bands 211a is introduced along the fabric plane, it is directed slightly above the fabric plane by a short distance after introduction. Similarly, the other assembly 211b is directed slightly below the tissue plane after introduction. This adjustment occurs before the two sets 211a, 211B of elastics are fitted with the transport device 217 and advanced to the press roller 218.
[0030] [030] It should be noted that the specific components of system 250 shown in the figures can be replaced by other suitable devices or components. For example, in alternative systems, stationary guides or eyelets can be mounted on a fixed frame. In addition, the movable guides can be mounted or associated with mechanical arms, cam systems and other suitable mechanisms.
[0031] [031] The sets 210a, 210b of elastic threads are distributed in an alignment generally parallel in the direction of the press roller 218. These elastic threads are analogous to the distribution 110 of elastic threads present in the upper waist region 124 of the absorbent article 101 in figure 1 and are distributed in parallel relationship with the upper and lower edges 202, 203 of the composite fabric 240. For the absorbent pants 101 of figure 1, the arrangements of the elastic yarn sets 210a, 210b must be identical. Other article designs can be provided, however, where the arrangements are not identical and one set may include more elastic yarns than the other set. Also, the spacing and concentration of the elastics, in other projects, may differ to achieve a specific function or aesthetic attribute. Although such designs may deviate from the preferred arrangements for annular elastic regions, as described above, it is expected that such alternative designs will not deviate completely and that some aspects of the preferred designs will be maintained (according to the invention).
[0032] [032] The movable elastic guides 216a 216b are configured to move in a direction orthogonal to the machine direction of the fabric 240 and are used to change and direct the placement of the sets 211a, 211b of elastic threads to the press roller 218 and adjust the lateral spacing of elastic threads. In this way, the two internal sets 211a, 211b of elastics can be referred to as variable elastic sets (such as the opposite of "fixed"). By vertically spacing the two variable sets 211a, 211b of elastics (as described above), the two sets 211a, 211b can move laterally without interference from each other. In this embodiment, for example, the two sets 211a, 211b of elastics cross sideways so that a lower set of elastics arrives at the press roller 218 as the upper side set while the other set becomes the lower side set.
[0033] [033] In a preferred embodiment, the elastic guides 216a and 216b are mounted on an alternating mechanism in such a way that the elastic guides are switched continuously in a lateral direction (orthogonal or transversal to the machine's process direction). The guides 216a, 216b can be carried on the same belt or continuous track and move together at all times. In other embodiments, the guides 216a, 216b can be operated independently of each other, particularly if the pattern of an elastic distribution is very independent of the other. Suitable drive mechanisms may include a cam-based mechanism, a servo drive mechanism or a hydraulic mechanism. Preferably, the movement of elastic guides 216a and 216b is described by a periodic function, in which a relative displacement of the elastic (or elastic guide) is a function of time (or fabric length) plus a distinct increment ( P, period). This displacement function expresses the periodic shape or pattern of the distributed elastics.
[0034] [034] The graphic illustration of figure 2C describes an exemplary periodic function reflecting the lateral displacement (D) of the moving guides 216a, 216b over a period of time (P) (which is proportional to the width of the elastic composite 136 in relation to the speed of machine). The two separate functions f1, f2 show the relative lateral movement of the guides required to produce the patterns of double elastic distribution in the fabric. As shown by the graph, the two elastic guides necessarily cross each other twice during each period. The multiple crossings translate to the generation of a series of annular elastic regions in the composite fabric, or at least two annular regions per period (P) or elastic composite body 136.
[0035] [035] The upper and lower blades 212, 213 are also directed by the conveyor device 217 in the direction of the fabric plane and then to the press roller 218. Thus, the two blades 212, 213 and the four sets 210, 211 of elastics they arrive substantially together in the press roller 218. The upper and lower blades 212, 213 serve to fit, capture and retain the elastic threads in position after passing through the press roller 218. The resulting fabric 240 of elastic material and material blades is fastened using any suitable bonding features including adhesive, ultrasonic or thermal bonding (not shown). In the case of bonding by adhesive, the adhesive can be applied to the upper and lower blades 212, 213 or applied directly to the sets 210, 211 of elastic yarns at any point before the elastic yarns and upper and lower blades meet and match on the roller press 218.
[0036] [036] Figure 3 illustrates the continuation of system 250 and the method of making the disposable absorbent article 101 illustrated by figures 2A, 2B. The system 250 and method of figures 2A and 2B produce an elastic composite fabric 240 that includes an upper blade 212, a lower blade not shown, but directly underlying the upper blade 212, and the E10, E11 distributions of elastic threads across the width of machine's transversal direction of the fabric 240. The two variable distributions E11 of elastic threads arranged in the center are directed by means of the periodic lateral movement of the elastic guides 216a, 216b in figure 2 (and their periodic function), which in this example results in a sinusoidal pattern. The pattern can also be described as a series of O1 annular elastic regions or areas formed by the channels and valleys of the two variable elastic distributions E11. Other linear and non-sinusoidal patterns can be produced by this process; but, for the purposes of this exemplary description, the sinusoidal pattern is employed. A set 211a of elastics is distributed in a first sinusoidal pattern E11 and are overlapped by the elastics of the second set 211b which are distributed in a second sinusoidal pattern E11. In this example, the first and second sinusoidal patterns are mirror images of each other. The two E11 distributions also define an Ix region in which one set overlaps and crosses the other. The degree to which the elastic yarn patterns overlap can be measured and is, hereinafter, described as the “X” variable. The wavelength of the sinusoidal pattern can also be measured and from now on it is recorded as the “Y” variable. Both “X” and “Y” variables are process parameters that can be adjusted by changing various process parameters such as machine speed, alternating speed and alternating depth.
[0037] [037] Figure 4 illustrates a process or conversion step to further modify and then convert the elastic composite fabric 240 of figures 2 and 3 to the disposable absorbent article 101 in figure 1A. As shown in figure 4, the subprocess proceeds downstream from left to right so that the initial step can be described as receiving an outlet (the elastic composite fabric 240) from system 250 and the subprocess of figures 2A and 2B. A fluid distribution and storage construction or core 105 is applied centrally over one of the overlapping regions Ox of the two sets 211a, 211b of sinusoidal elastic wires. The elongated central part 205 is applied and positioned laterally with the length of the central part 205 being deposited on the fabric 240 in the machine's transverse direction. In this embodiment, the central part 205 is located between the upper and lower E11 elastic distributions. Simultaneously or immediately after the application of the central part 205, a sheet of material 209 (not shown) is applied over the central part 205 and the fabric 240. This sheet of material becomes the top layer in the disposable absorbent article 101. Additional resources such such as independent elastic leg hems, fixing tapes and disposal tapes can be added to the construction at this stage.
[0038] [038] In a subsequent step or stage in the process, the preferably circular holes 204 are punched or cut in the fabric 240. In this embodiment, the holes 204 are centrally punched within the elastic annular regions O1, but not in the overlapping region Ox. As shown in figure 4, the holes 204 are also in longitudinal alignment with the Ix intersections of the elastic wires and with the “Y” wavelength distance of the sinusoidal patterns. Cutting holes 204 results in the provision of leg openings 104 in the disposable absorbent article 101. Therefore, it is an important requirement of the disposable absorbent article 101 that the wavelength “Y” of the sinusoidal pattern be equal to the width of the finished article 101.
[0039] [039] The next step in the production process involves cutting or dividing the continuous composite fabric 240 across the machine's cross-directional width and along the 431. cut lines. This end cut can be accomplished through several known mechanisms for those skilled in the art, including a die cutting process or a water jet cutting process. The position of the end cut is determined in relation to the “Y” wavelength of the sinusoidal pattern. Notably, the cut lines 431 divide each hole 204 and alternating elastic annular regions O1 in half. The cut lines 431 are also spaced on either side of the central part 205.
[0040] [040] Upon separation, separate individual elastic composites 136 are formed. The elastic composite 136 now has a longitudinal centerline (lengthwise) that divides the elongated central part 105 into two equal parts. Additionally, composite bodies 136 have the two side edges 106a, 106b along the original cut lines . The side edges 106a, 106b consist of an upper segment and a lower linear segment. The non-linear cut-out section is positioned in between the two segments and is intended to form the leg openings. The elastic composite 136 also features halves of elastic annular regions extending to each side edge 106a, 106b, which have been cut by the cut lines, and complete elastic annular regions in the center. The elastic composite 136 also has a central part 105 centrally located over the central elastic annular region.
[0041] [041] Finally, the elastic composite 136 is folded along the fold line 425 which corresponds to the longitudinal axis YY of the fabric 140. The elastic composite 136 in this embodiment is symmetrical with respect to this axis YY. In this way, when folded, each feature or part in the bottom half matches the exact same feature or part in the top half and covers it. The result is the disposable absorbent article 101 in figure 4 (and figure 1A). In the flat and folded state, article 101 now displays a quarter of each leg hole 104 and a quarter of each annular region half at the side edges 106a, 106b. To finalize the construction of absorbent pants, the side wedding edges 106a, 106b are sealed (the seals 130), while the top and bottom wedding edges 102, 103 and the fourth leg hole parts are not. The specific manufacturing process for this modality employed a high value of “X”.
[0042] [042] The process described with reference to figures 2 to 4 is an example of the manufacturing process of the inventive absorbent article. It is not required that the steps described are completed in the order described. It is possible, and in some circumstances it may be preferred, that the steps are completed in a different order or that some of the steps can be completed simultaneously.
[0043] [043] Figure 5 is a simplified and schematic representation illustrating an elastic composite fabric 540, as well as a method or process of manufacturing the elastic composite fabric 540 and an absorbent article, all according to an alternative embodiment of the invention. The illustration provides the last or downstream stages of the process, after the introduction and application of sets 510a, 511a, 511b, 510a of elastics. Downstream of the press roller (not shown), the elastic composite fabric 540 generally consists of two or three layers of blade material and the desired elastic patterns and annular elastic distributions for the waist region and the crotch region. In this modality, the two variable distributions 511a, 511b of elastics trace a pattern and period that consist of a large (wide) elastic annular region O1 and a region of overlapping Ox 'limited therein and a small (narrow) elastic annular region O3 and its Ox overlapping region ”.
[0044] [044] In a downstream stage, a desired absorbent center section 505 is applied over the elastic composite fabric 540, over the narrow elastic annular region O3. Then, a layer of material sheet (from the top layer) is applied over the elastic composite fabric and the central part 505, to provide an enhanced elastic composite fabric 540 having all of the major desired components of the inventive absorbent article. In this step, the elastic composite fabric 540 can be described as a fabric of elastic composite bodies. In one aspect of this embodiment of the invention, the resulting elastic composite fabric 540 is folded around the longitudinal center line YY. As shown in figure 5, this folding step can be performed by deflecting the conveyor displacement by about 90 degrees and in such a way that one half of the elastic composite fabric 540 also rotates 180 degrees on itself. The result is a 90-degree turn in which a half of the 540 fabric extending longitudinally is folded up and matches its mirror image. The folded tissue 540 reveals a series of sections of one half of the wide annular regions O3. Using a conventional hole punch or cutter, the leg holes 504 (or more particularly, halves of the leg holes) can be cut in the elastic composite fabric 540 at a location within the wide overlapping region Ox 'and between the center sections 505. In this modality, this cut-out semicircle is made on the upper edge of the folded elastic composite fabric.
[0045] [045] In addition, a bonding or sealing line 530 is applied from the leg hole 504 towards the side edge, thus describing the contours of a unitary elastic composite body 536 according to the invention. Preferably, sealing is achieved by means of ultrasonic bonding, thermal bonding and more. Finally, the separate units 536 of the elastic composite fabric 540 can be divided by cutting through the sealing or wide seam line 530. In additional embodiments, the sealing and cutting steps can be performed simultaneously. The result is an elastic composite fabric in the form of training pants, according to the invention.
[0046] [046] Turning now to the alternative and schematic illustration of figure 6, an alternative system 650 and method of making the disposable absorbent article uses some different steps and sequences. A first blade of material 612 is transported separately by conventional devices. The pre-tensioned elastics 610 (for the upper waist regions) are applied to the blade 612, preferably close to the side edges, as previously described. The resulting elastic composite 640 is then transported in the direction of the transport device 617. The two sets of elastics 611a, 611b are also displaced and transported in the direction of the transport device 617, using the elastic guides 616a, 616b. As before, elastic guides 616a, 616b vary the lateral position of the elastic assembly 211a, 211b according to a periodic function and to elicit a preferred pattern. Thus, the elastic composite fabric 640 finds the two sets 611a, 611b of variable elastics on the press roller 618, thereby enhancing the original fabric 640 with preferred elastic distributions. These preferred distributions include a series of annular regions, as in embodiments described above.
[0047] [047] In addition, a separate combination fabric 609 is applied to the elastic composite fabric 640 by means of a second press roller 618. This subsequent application includes incorporation of a continuous sheet of material on these core materials which are already deposited in a intermittent, as shown in figure 6. The resulting output of the second press roller 618 is a composite elastic fabric 640 having two sheets of material and two sets of variable elastics and two sets of mutually parallel pre-tensioned elastics, similar to the outputs of systems and processes of figures 2A, 2B.
[0048] [048] Figures 7 to 9 illustrate additional modalities of the elastic composite fabrics and distribution that can be achieved by the present invention and / or used therein, where equal reference numbers are used to indicate equal elements. Referring first to Figure 7, the elastic composite fabric 740 includes a sheet of top layer or bottom layer material (not shown) 712, a sheet of lower material (not shown), but directly underlying the top sheet 712 and multiple elastic yarn distributions. A distribution of elastic threads 710a, 710b is provided along each of the upper and lower edges 702, 703 of the fabric 740. These distributions at the end constitute the elastic annular region around the waist opening. Between these two distributions, the two variable elastic distributions 711a, 711b are provided (for the lower waist, crotch and leg regions). As in figure 3, these elastic yarns positioned variably are distributed by means of periodic lateral movement of the elastic guides in figure 2, preferably to elicit a sinusoidal pattern. The first set of elastics 711a is distributed in a first sinusoidal pattern and is superimposed by the other set 711b of elastics distributed in a second sinusoidal pattern. In this exemplary modality, the first and second sinusoidal patterns are mirror images of each other. In this modality, the degree of overlap “X” of the two elastic patterns is much less than that described in the modalities related to figures 3 and 4. The resulting absorbent article made from this type of elastic distribution is shown in figure 7A, and features a greater amount of elastic material in the crotch region and less elastic material in a central waist region.
[0049] [049] Figure 8 illustrates an alternative elastic composite fabric 840, in which the degree of overlap or “X” value is substantially zero or close to this. An illustration of the absorbent article 801 using this elastic distribution pattern and an elastic composite body 836 cut from the fabric 840 is shown in figure 8A. Article 801 does not characterize a crotch region 834 that is as widely elastic as that of absorbent article 701 in Figure 7A.
[0050] [050] Figure 9 also illustrates another additional embodiment of an elastic composite fabric 940 according to the present invention. This alternative composite fabric 940 employs an alternative variable distribution 911a, 911b of elastics. Specifically in this embodiment, the variable sets 911a, 911b of elastic yarns are distributed in a pattern in which the two sets do not overlap. In this example, the value of "X" is said to be negative. Although the patterns do not provide a series of completely annular elastic regions, the "X" value is kept small enough to approximate a complete annular region, that is, a substantially annular elastic region. An illustration of absorbent article 901 using such an elastic distribution and substantially annular elastic regions is shown in figure 9A. Because they are substantially annular, the elastics around the waist opening and the leg opening occupy more than 85% to 95% of the full circle, and thus the elasticity around the opening is virtually continuous and substantially complete.
[0051] [051] Figures 10A and 10B also illustrate another elastic and disposable absorbent composite according to the present invention. The elastic composite is similar to that provided in figures 8 and 8A. The overlapping region dimension “X” has a value of zero, where the two distributions 1111a, 1111B meet, but do not cross completely. Instead, the two elastic distributions 1111a, 1111b form a slightly elongated wide elasticity concentration in the center of the composite bodies 1136. In the resulting disposable absorbent article, this feature translates to a concentration of all active elasticity in the crotch region 1134. The Figures 11A and 11B are also provided to show exemplary dimensions of an elastic composite of the invention. The figures also show preferred locations for a certain element of the elastic composite 1136. For example, the central part 1105 in this embodiment is centrally located on the elasticity concentration discussed above, but is cut to a width that approximates the length of the elasticity concentration discussed. previously.
[0052] [052] Figures 11A and 11B also illustrate two stages in an alternative method of making a disposable absorbent article according to the invention. Figure 11A shows a unitary elastic composite body 1136 that may have been cut recently from an elastic composite fabric according to the invention. Unlike the finished elastic composites described above, the elastic composite 1136 had no holes or sections cut from it (for later leg openings). Instead, the elastic composite 1136 is folded into its full rectangular frame around the longitudinal axis YY. The folded elastic composite 1136 then features fourth parts of leg hole sections 1104 that can be cut or punched. Then, the side edges 1106 can be sealed to form the leg openings of the absorbent training pants according to the invention.
[0053] [053] In the illustration in figure 12A, another alternative elastic composite fabric 1240 is shown exhibiting a double elastic distribution pattern (E10, E11). Among other things, the variable distributions of E11 elastics feature a wider and more block-like shape for their large annular Ox 'regions, rather than the softer and more rounded shape of the annular regions depicted above. Figure 12B is a graph of a periodic function and pattern reflecting directional lateral movement through elastic guides to produce the variable elastic distribution patterns E11 in the elastic composite fabric of Figure 12A. The graph reveals a relationship characterized by a steep (almost abrupt) stretch from a minimum displacement position (D1) to the maximum displacement position (D2) for half a period (1 / 2P), as well as the return to the minimum displacement position (D1) during the second half of the period (1 / 2P). This is reflected in the steep or steep angle of the elastic distribution E11 in figure 12A, as well as in the necessarily tight concentration of the elastics between the channels and ridges. The graph also reveals a small leveling of the elastic guide when reaching the maximum or minimum displacement position. This feature is reflected by a somewhat flat area or plateau in each of the channel and top of the E11 elastic distributions. This pattern feature differs from the gradual and more rounded channels or ridges in elastic distribution patterns described earlier.
[0054] [054] In this way, the absorbent article formed of an elastic composite of the 1240 fabric features a thinner and denser elastic annular region around the leg openings. Elasticity is more concentrated in the inner part of the leg opening near and around the crotch region, as opposed to the area fitting the upper part of the thigh.
[0055] [055] Flowchart 1300 in figure 13 illustrates an exemplary and preferred method of manufacturing the elasticized absorbent pants in figure 1. This preferred process substantially corresponds to the method of manufacturing the elastic composite as described in relation to figure 5. The process begins at apply multiple elastic distributions to a sheet of moving material to form a moving fabric from an elastic composite (step 1361). Then, each of a central section and a second sheet of material is periodically applied over the moving fabric to define a finished fabric of different elastic composite bodies (steps 1362, 1363). In the subsequent steps, different absorbent pants articles are modeled after the finished fabric. In the preferred modeling steps, a lower half and an upper half of the fabric and composite body are joined. More preferably, the elastic composite fabric is folded along a longitudinal centerline (step 1364). In this specific modality, a section of the folded fabric is periodically cut (step 1365), thus periodically providing cutout sections between central sections and between elastic distributions. The two halves are then sealed along them to create two sealing lines extending laterally (step 1366), thus preferably substantially joining multiple elastic distributions in one half with elastic distributions in the other half and creating an opening of waist and pair of leg openings. Finally, the elasticized absorbent articles are separated from the fabric when cutting the side part lines (step 1367). More preferably, the sealing and cutting steps immediately produce elastic absorbent pants having a waist opening, pair of leg openings and multiple substantially continuous elastic distributions extending through two lateral sealing lines and creating annular elastic regions around the waist opening and leg openings.
[0056] [056] Flowchart 1400 of Figure 14 describes, more generally, the basic steps in a method of making an elastic composite fabric having multiple patterns of elastic distribution therein, in accordance with the present invention. An elastic composite fabric like this at the end is configured in such a way that elastic composite bodies of absorbent pants can be separated from the fabric. The preferred method begins with the step of applying multiple continuous distributions of elastics over a sheet of moving material to form an elastic composite fabric moving in the longitudinal or machine direction, the distributions generally extending in the machine direction (step 1461). The method additionally entails periodically applying a central section on the moving elastic composite fabric (step 1462). Then, a sheet of superior material is applied continuously over the fabric including the central sections (step 1463). In the step of applying continuous elastic distributions, at least two periodic elastic distributions are established on the moving fabric by varying the lateral position of the elastic distribution as the distributions are advanced in the machine direction of the elastic composite moving fabric ( substep 1461A). In additional embodiments, the step of applying continuous distributions may include periodically varying the lateral position of the elastic distribution before fitting with the material sheet and, in addition, also periodically varying the lateral position to establish two sinusoidal patterns in the moving composite fabric elastic. Asymmetrical Leg Cutouts
[0057] [057] Figure 4A is a simplified representation of a fabric-based process for making a disposable absorbent article 101 'in accordance with the present invention (where like elements are referred to using like reference numbers). As a variation of the process described with reference to figures 2 to 4, this process can be employed to produce a modified disposable absorbent article 101 '. This alternative process is particularly suitable for manufacturing a modified pants product 101 ’having adapted leg openings 104’. Figure 4A shows the moving fabric 240 'of the elasticized composite bodies 136' from which a disposable absorbent article 101 'is derived. As previously described, leg openings 104 'are formed subsequent to the folding step by joining the two linear segments 106a', 106b 'of the side edges of the elasticized composite body 136' and then sealing the joint. The free non-linear cutout section (between the linear segments 106a ', 106b') of the side edge is substantially connected to form the leg openings 104 '. In the finished absorbent pants product 101 ', each leg opening 104' can be described as having a front part that is larger and extends further and is more arched than the back part (for example, as shown with absorbent pants 101 'in figure 4A). Thus, the front part of the leg opening 104 'is more on the user's thigh than the rear part. In certain designs of the 101 'pants product, the asymmetric or irregular leg opening 104' improves fit and comfort around the front area of the user's thigh. This reduction in excess material in the front of the pants, which is relatively flatter and less rounded than the back when the pants are worn, allows more space and prevents clumping and tightening in the front. The back of the leg hole fits less and more tightly around the back of the user's thigh, and thus preserves sealing and loading capacity on the back of the pants product.
[0058] [058] As illustrated in figure 4A, the alternative pants product 101 ’, in simpler terms, is achieved by varying the leg cutout step. Specifically, holes 204 'are punched or otherwise drilled in the fabric 240' in a position offset from the longitudinal centerline YY. With the circular cutouts in the process described above, the cutouts are placed symmetrically around the longitudinal center line YY and thus around the fold line 425. For the exemplary pants product 101 ', a circular or elliptical cutout 204' is placed asymmetrical shape around the longitudinal center line YY and lower in relation to the longitudinal center line. In figure 4A, cutouts 204 'provide an arc region below the longitudinal axis YY that is larger (in length and arc area) than the arc region provided above the longitudinal center line YY. In the folding step, the composite fabric 240 'is folded along the fold line 425, which corresponds to the longitudinal center line YY, to form the leg opening 104'. As a result, the front part of the leg hole 104 ’is wider and more overlapping the user’s thigh.
[0059] [059] As with the modalities described above, periodic distributions of elastics are directed around the leg cutouts 204 ’and the leg openings 104’. The elastic distributions 111 ’form annular elastic regions around the leg holes 104’, thereby improving fit and support. In this particular embodiment, the distributions of elastics 111 'that cross close to the upper part of the leg cutouts exhibit a flatter pattern than the other elastic distribution.
[0060] [060] In another variation, the leg cutout can be used in a shape other than a circle. For example, an elliptical cutout can be used to form a leg opening in the pants product that is softer or narrower than the one resulting from a circular cutout. In either variation, a curvilinear elastic distribution can be applied to accommodate the leg clippings and at the end provide an annular elastic region around each leg opening in the finished pants product. The inventive method of elastifying a moving fabric substrate, therefore, is shown to be well suited for providing annular elastic regions around leg openings of different shapes and locations in the fabric. Elasticized Pants Product Similar to Short
[0061] [061] With reference to figures 15A-15B and 16A-16B, a variation on the method described above for making an absorbent pants product according to the invention will now be discussed. In this embodiment, the steps of applying elastic distributions and providing cutouts for legs in a moving fabric 1540 are modified to produce an alternative or modified trouser product 1501. Two exemplary trouser products 1501, 1601 are shown in figures 15A and 16A. The trouser products feature a flatter or more horizontal leg opening 1504, 1604, which can be described by a leg opening angle θ between the vertical center line W of the pants and a TT plane tangent to the leg opening. When compared to the pants products described above, the leg opening angle θ in these modalities are turned outward and closer to 90 degrees. In the pants product in figure 1, the angle θ is close to about 45 degrees, while each of the pants products in figures 15A and 16A features an opening angle for the leg that can be greater than about 75 to 80 degrees .
[0062] [062] The simplified illustration of a moving fabric substrate in figure 15B shows the modifications for the elastic distributions 1511a, 1511b and for the leg cutouts 1504 required in a process to manufacture the 1501. trouser product. for legs 1504 are not circular, but are in the form of relatively flat ellipses. The smaller diameter of the ellipse is substantially smaller than the larger diameter, creating a cutout 1504 that is more slit-like than a circular hole. Second, the elastic distributions 1511a, 1511B provided around leg cutout 1504 are flatter and less sinusoidal. In this exemplary embodiment, the two elastic distributions 1511a, 1511b do not intersect or overlap. The upper elastic distribution 1511a remains above the longitudinal center line YY and the lower elastic distribution 1511b is maintained below it. The elastic distributions 1511a, 1511B are not completely flat, but feature a small curvature while traversing the periphery of the leg cutout 1504. In any case, an annular elastic region around the leg opening 1504 is achieved.
[0063] [063] Referring now to the simplified illustration of a moving fabric 1640 in figure 16B, the two sets of elastic distributions 1611a, 1611B intersect to create a more sinusoidal pattern around the central area 1605, or at least a periodic pattern featuring alternating high and low amplitude sections. In the area where the cutout for leg 1604 is to be provided, however, the elastic distribution is flatter and exactly follows the elliptical slits 1604 in the 1640 fabric. 1611B high amplitude. The elastics pass over and are concentrated in the upper and lower extension of each elongated core placement. In this way, the elastics in general approach the outer periphery of the central part 1605.
[0064] [064] In one or another product of pants, the resulting leg opening is described as being substantially elastified in circumferential form and featuring an elastic annular region. When used, the annular elastic region substantially surrounds the wearer's thigh. In one aspect, the pants products of figures 15A and 16A are given characteristics more similar to elasticized shorts (for example, cycling shorts). In this way, the pants product is provided with a surrounding elasticized support around the wearer's thigh. This circumferential support in general is more horizontal and less focused than that of the leg hole of the product of pants 101 in Figure 1A. The circumferential fit between each elasticized leg opening and the user's thigh serves as an anchor point for the absorbent pants product. Along with the circumferential elastic annular region around the waist, the elastic annular regions around the leg openings actively seal the pants product around the wearer's body. Importantly, support provided through the elasticized leg holes also provides enhanced support in the crotch region and core area of the pants product. Intervals in Rubber Band Distributions
[0065] [065] Also in another aspect of the present invention, the system and method for making an absorbent elastic product includes a modified step of applying multiple distributions of rubber bands to the moving fabric. As previously described, in a preferred process, continuous elastic distributions are applied generally in the machine direction. This includes applying and establishing at least two periodic or curvilinear distributions (generally in the machine direction) of elastics on the moving fabric by varying the lateral position of the elastics as the elastic distributions are advanced in the machine direction. In addition to this step, continuous elastic distributions can be applied to establish distributions in general in the direction of elastic machine in each elastic composite body that have intermittent intervals (in the elastics). That is, a continuous distribution in a general direction in the direction of elastic machine is applied, but the elastic thread in the finished composite fabric and in the final product is effectively segmented because of the intermittent intervals.
[0066] [066] The locations of the gaps in the fabric are predetermined to correspond with desired gaps or the absence of elastics in the final pants product. In some applications, the gap may be large enough to effectively not put elastics in the target area, and in other applications it will be minimized to maintain continuity in the annular regions of elasticity in the final absorbent product. In an exemplary process, intervals in the elastic distributions are provided at locations on the fabric that correspond to the side edges of the pants product, as a result of which the sealing or side joints are formed. Also in another embodiment, intervals in the elastic distributions are located to match the location of the core near the central region or crotch of the absorbent article. In this embodiment, it may be desired to detach the central part of the elastics and provide a relatively stable and non-predisposed core structure, or to allow undisturbed placement of additional elements on the core surfaces.
[0067] [067] To exemplify these variations in the process and in the absorbent product of the invention, figure 17 provides a simplified illustration corresponding to the illustrations of figures 2A-B and 4, with a step of cutting or creating the elastic gap incorporated into the process. Figure 17 shows the elastic composite fabric 1740 delivered by rollers 1701 and 1702 and an elastic composite body 1736 cut from the 1740 fabric. As shown in the moving elastic composite fabric 1740, the multiple continuous elastic distributions 1710a, 1710b, 1711a, 1711b are applied to the moving fabric with the two central periodic elastic distributions 1711a, 1711b overlapping along the central part of the fabric 1740. In this embodiment of the invention, absorbent product 1701 is provided at intervals U1 along the edges or side joints. Removing rubber bands in this area provides a flat, consistent surface that can better accommodate a sealing operation, such as ultrasonic bonding or heat treatment. In addition, the flatter and more consistent surface, without frowning, can be assumed to be more aesthetically attractive in some product designs. In some applications, the U1 intervals will be minimized to ensure continuity of the annular elastic regions discussed above.
[0068] [068] As described above, elastic distributions 1710a, 1710b, 1711a, 1711B can be applied to a non-woven fabric of lower layer material as together input feeds fit with a 1701 forming roller. intermediate non-woven sheet meets forming roller 1701 and is applied over the elastics to form a subsequent fabric featuring multiple continuous distributions of elastics sandwiched between two non-woven fabrics. Preferably, the elastics are subsequently cut or opened by fitting the forming roller 1701 with a cutting roller 1730, and while being retained in this sandwich and before the elasticized fabric encounters the inlet feed of the core section (s). Such lamination of the elastics helps to hold the elastics in place during and after cutting. In this technique, the elastics can be cut by compressing a blade of the cutting roller 1730 through the intermediate nonwoven layer and against the roller 1701, preferably with minimal perforation of the lower layer.
[0069] [069] In a suitable arrangement, forming roller 1701 fits with a second roller 1730 equipped with a set of blades or cutters 1731 to cut the elastics, as known in the art. A suitable arrangement can be found in the US patent specification 4,525,229 (see, for example, figure 2). For the exemplary pants product design, a first pair of the 1731 blades or cutters are axially spaced side by side and have sufficient lateral extension to fit with the extension of the waist elastics. The 1731 cutters, therefore, are positioned close to the edges of the cutting roller to match the lateral locations of the waist elastic distributions in the fabric. In the embodiment shown, cutters 1731 are long enough axially to reach and cut central elastic distributions 1711a, 1711 as well as waist elastics 1710a, 1710b. In additional embodiments, two independent pairs of cutters can be employed, however, to minimize perforation of the unbraided layers. A second pair of cutters spaced side by side in a similar way (not shown) is provided exactly at various degrees from the first pair of 1731 cutters. The spacing between the two pairs is selected to match the desired U1 interval in the moving fabric 1740 and to approach the width (really twice the width) of the desired side junction.
[0070] [070] As is known in the art, the speed of the cutting roller 1730 is synchronized with the rotation of the forming roller 1701 in order to properly articulate the required interval. 1731 cutters can additionally register with an anvil (s) provided on the forming roller 1701 to make the desired cut. In the embodiment shown, the circumference of the training roller 1701 can correspond to four or five times the width of a trouser product in the 1740 fabric. Thus, the training roller 1701 is equipped with several appropriately spaced anvils, and the cut 1730 will rotate at a rate that will cause 1731 cutters to fit with the anvils.
[0071] [071] Also in an additional modality, the product of trousers can be free of elastics in the location of the central part 1705 and around it. A desired U2 gap has a width that approximates the width of the central part 1705. A modification like this may be desired to provide stability and consistency for the central part, including preventing any puckering of the central part as well as the blade (s) ) adjacent non-woven (s). In this particular project, only the two central distributions of elastic bands 1711a, 1711b are at intervals, since the waist elastics 1710a, 1710b do not advance over the intended area for the central part 1705. The same 1730 roller that cuts the waist elastics, or another cutting roller, can be provided to fit with forming roller 1701 and create intermittent U2 intervals in the two sets 1711a, 1711b of periodic or curvilinear elastic distributions. Since the distributions of target elastic bands are typically closer to the center of the moving fabric, the wedding cutters and anvils are also located near the center of the cutting roller 1730 and forming roller 1701, respectively. To make the desired cut, two pairs of cutters axially spaced side by side can be used or a larger cutter that extends from one elastic distribution to the other. Preferably, two successive pairs of cutters are provided that are spaced side by side in correspondence with the gap in the elastics. Structures of Elastified or Profiled Cores
[0072] [072] In the systems represented in each of figures 2 and 6, as well as in that described in relation to the process illustrated by figures 3, 4 and 5, the central part is delivered intermittently to the pre-cut and oriented moving fabric generally perpendicular to the direction of longitudinal movement of the moving fabric. As shown specifically in each of figures 4 and 5, the pre-cut central part is delivered over the fabric extending lengthwise between the longitudinal edges of the fabric, but between each side edge (or cut line) of the composite body elasticized. The central part, therefore, is deposited in correspondence with its final location and orientation in the finished disposable absorbent product.
[0073] [073] In many of the modalities described in this document, the inventive process is used to apply an elastic distribution across the width of each absorbent product, including over the central part. The fit or interaction between the elastics and the central part can transmit elasticity to the central part, as required or desired by the design of the absorbent product. The resulting elastified central part can portray aesthetic and functional characteristics because of its elasticized regions. The benefits of elastified core configurations were discussed, for example, in US Patent Application Publication US2011 / 0130736 A1, specifically figures 6 through 9 in that publication (whose application is designated for a common applicant with the applicant for this application and includes , as inventors, one or more of the inventors named for this application). One of the figures is reproduced in this document as figure 18 to illustrate an elasticized core structure 1801 (in a contracted state) achievable with the present inventive system and process. The core configuration includes a plurality of elastic distributions 1810 applied laterally in the machine direction, and generally centrally to the moving fabric and through the central part 1812. This earlier patent application publication and specifically Figures 6 to 9 of the publication, and descriptions accompanying those figures, are incorporated into this document for background purposes and made part of the present disclosure. The common element in these referenced elastic core designs is that the elastics 1811 are directed and applied in the central part 1812 or close to it in the lateral direction in relation to the length direction of the central part 1812. In the present system and process, the application of elastics in the machine direction and centrally on the moving fabric, and the intermittent deposition of the central part on the fabric substrate in its final position and orientation, facilitates the provision of an elasticized central part like this. In addition, the system and process currently described allow variations in the elastic pattern applied to the central part, including a plurality of different distributions or sets of elastics, spacing between the elastics, linear and / or curvilinear distribution patterns, including sinusoidal and others shapes.
[0074] [074] The present system and process also allow the cutting or interval of the elastic distributions on the moving fabric and in the final disposable absorbent product. In one embodiment, other curvilinear or periodic designs can be employed to distribute elastic bands around and near the periphery of the central part and to stimulate a pocket or cup shape in the central part. The overlap of the two elastic distributions creates an annular elastic region along the periphery of the central part, which can advantageously act as a type of O-ring seal. An elasticized O-ring like this can be designed in alignment with the user's buttocks to improve absorption and retention. The elastic distributions shown in figures 3-4 and 7-7A are two appropriate configurations for establishing an annular elastic region like this and O-ring sealing around the central part area.
[0075] [075] Several additional variations in the process can be used to fit the elastic distributions with the central part. As previously discussed, the elastic may not be applied directly to the central part. For example, the elastic can be applied to the bottom layer and located between the bottom layer and a second or non-woven sheet. The resulting composite bodies are then joined to the central part. With these composite bodies, and specifically the lower layer fitted and connected directly to the central part, the elastics within the lower layer composite bodies act on the central part to create the desired elasticized and / or profiled shape. In another exemplary variation, the rubber band can be applied to the bottom layer and then the central part is applied directly on top of the rubber bands (for example, without an intermediate blade). In any case, the elastic and blade materials, and the central part, are joined on the forming roller, and adhesive can be applied to the material and elastic sheets just before reaching the forming roller.
[0076] [076] In some of the core designs of figures 6 and 7 in the US patent application publication US2011 / 0130736 A1 referenced, the elastics are applied laterally and centrally in a central rectangular part or in specific modalities in both or in each one of two overlapping cores. Elastification of the absorbent core structure, by releasing tension in the elastics, creates a narrowed central region of the elastified central part, which, as described in the referenced publication, provides aesthetic and functional benefits for the absorbent product. In additional modalities, the spacing or pitch between successive elastics can be designed to create more than one concave narrowed central region. This can be achieved, for example, by placing a higher concentration of rubber bands along the center and a lower concentration away from the center (see, for example, figures 7C-D in the referenced publication). The elastics can be strategically placed between a pile of cores and other materials to provide the core configurations profiled in figure 8 (from the referenced publication) as well as the corrugated configuration in figure 9 (in the referenced publication). Elastic Composite Fabric Forming Laminator
[0077] [077] Figure 10 is provided as a simplified physical representation of a system 1050 according to the invention, and more specifically of a forming laminator or joint of elastic composite fabric 1000 of the system. The area (or region) within the dashed box represents, in one aspect of the inventive system 1050, a centralized conglomeration of fabric components and machine system components, by which the desired fabric 1021 of different elastic composite bodies is produced. The inventive system 1050 can be described as comprising a plurality of feed lines that converge at the joint laminator 1000 in a predetermined way to produce the fabric substrate in predetermined motion 1021. The incoming feed lines are managed to direct a component of the product at a rate, speed, orientation, and side placement required of the fabric substrate product. Some inlet feed lines can be associated with “cut and lay” units that intermittently apply a separate unit of material to the moving fabric. In addition, incoming power lines are managed to converge and fit other incoming power lines in the desired sequence and required rate.
[0078] [078] With system 1050 in figure 10, each of the elements of the fabric substrate is preferably applied to the laminator 1000 linearly or in line in the machine direction. In this way, all feed lines and exit lines can approach the laminator 1000 from the right or left, or from the top of the laminator 1000, but within a side window not exceeding the axial length of the forming roller 1001 (and, in some micro-applications, not substantially greater than the width of the tissue substrate 1021a). This physical characteristic of the 1050 system promotes maneuverability and flexibility in the process, including the ability to modify the properties of the finished absorbent product. The inventive system, and more particularly the laminator 1000, also exhibits a small footprint. The laminator 1000 also serves to be packaged as a self-contained modular unit.
[0079] [079] In one embodiment of the invention, a fabric substrate product 1021a is produced by laminator 1000 as shown in the lateral cross section of figure 10A. Upon exit from the laminator 1000, the moving fabric substrate 1021a comprises an upper layer TS at the bottom, an AD layer (acquisition and distribution) above the upper layer TS, and a series of individual elongated cores C above the layer AD. Above this, a sandwich is provided with an intermediate nonwoven layer NW, a lower layer BS and several distributions of elastic E between them. Directional arrows in figure 10 indicate the direction in which the composite fabric 1021a is folded. As shown, fabric 1021a is folded in such a way that the top layer TS rotates towards itself and at the end is positioned on the inside of the folded fabric. In the finished absorbent article when used, the top layer TS is placed adjacent to the user's body.
[0080] [080] After emerging from laminator 1000, fabric substrate 1021a can be folded, sealed and cut to produce the disposable absorbent article. These subsequent steps are considered to be later joining steps that are implemented after delivery or departure of the fabric 1021a. The folding step is performed in a folding station 1022 comprising angled directional bars which are located immediately in front of the rollers 1001, 1002. Folding station 1022 directs the fabric 1021 to a series of turns that turns and folds the substrate 1021a. Once folded, the leg holes are cut out, the side seams are sealed together, and then the fabric substrate is cut along the seams (to produce different pants products). These steps were discussed with respect to figures 4 and 5, for example. Additional pre-conditioning steps can also be used after the sealing and cutting steps. In alternative embodiments, the step of cutting or puncturing the cutouts for legs can be provided before folding station 1022 and immediately after delivery of the fabric substrate outlet 1021a.
[0081] [081] It should be noted that the subsequent joining steps can be modified to allow a diaper product, such as the opposite of a pants product. In a variation like this, the side sealing step can be eliminated. In this respect, the exit of the fabric substrate may require only the cutting step to produce different diaper products. In a further variation of the system, process and product that is derived from the inventive system and process, the fabric substrate produced by the joint laminator can be folded in the opposite direction to produce a modified pants or diaper product. A product object like this may require modifications to the input feed lines for the joint laminator, as further described below.
[0082] [082] Referring now to figure 10 and also figure 10A, various stages of the joining process are described as a sequence of joining various components of the fabric substrate 1021a. The primary components of the laminator are a main or forming roller 1001 and a corresponding secondary roller 1002. As shown in figure 10, an inlet feed 1011 of lower layer material is engaged by forming roller 1001 as well as distributions 1012 of waist bands and distributions 1001, 1003 of curvilinear bands (as previously described in more detail with respect to figures 2A and 2B). The moving fabric of elastics applied to the bottom layer is then fitted over the top by an inlet feed 1014 of intermediate nonwoven. This fit creates a sandwich of the rubber bands inside the bottom layer and the intermediate nonwoven. In additional embodiments, a cutting roller can be added to fit with the forming roller and to selectively cut one or more of the elastic distributions fitted by the bottom and intermediate nonwoven layer.
[0083] [083] The resulting elasticized fabric then fits with the 1016 inlet feed of cores spaced side by side and oriented laterally. As previously described, the cores are spaced in correspondence with a central position in the final pant product and in alignment with the longitudinal centerline of the moving fabrics and the forming roller 1001. The cores are preferably delivered pre-cut into a shape elongated rectangular which is in the direction of length in relation to the longitudinal or machine direction. A cutting roller machine 1027 is provided upstream of rollers 1001, 1002 and receives a continuous feed of blade core material from a supply roller 1029. Preferably, a second inlet feed 1016 of a second center part or a layer ADL is directed at the top and on the resulting elasticized composite body (with core). In this case, an inlet feed 1017 of the upper layer fits with the elastic composite (with cores) to provide an upper layer over the core material (s). The resulting product is a moving fabric substrate 1021 of an absorbent composite elastic body that can be further processed to produce a pants product or a diaper product.
[0084] [084] In this system configuration, the fabric substrate 1021a is delivered with the lower layer BS on top and the upper layer TS on the bottom. The continuous fabric 1021a is preferably passed to the folding station 1022, which effectively turns and folds the fabric 1021a. Hence, the side joints of the fabric 1021a can be sealed and then cut, to produce distinct elastic composite bodies. Inverted elastic composite
[0085] [085] In an additional embodiment, an alternative disposable absorbent product is produced by the system and process by modifying the incoming feed lines for the joint laminator 1000. An alternating moving fabric substrate 1021b such as this with an elastic composite body is represented in figure 10B in lateral cross section. The moving fabric 1021b produced by the joint laminator 1021 provides a top layer TS as a top layer and multiple distributions of elastics E fitted between the top layer TS and an intermediate nonwoven layer NW. The central part C, the layer AD and the lower layer BS complete the rest of the elastic composite. Referring to figure 10, a composite fabric 1021b like this can be achieved by exchanging, for example, the upper layer supply 1017 with a lower layer source and possibly, as necessary, exchanging the input sources AD and core. Finally, the resulting fabric substrate is folded in the opposite direction (see directional folding arrows) in such a way that the elastic distributions E are internal to the central part C. When placing the elastics closer to the user, the top layer TS is pulled closer to and around the user's body and the elastic composite body 1021b will tend to support and accommodate the contour of the user's body. The improved fit of the top TS layer around the user not only improves fit, but the top TS layer is also better positioned to prevent leakage. In additional embodiments, the inventive process can be employed to apply distributions of sinusoidal or other curvilinear elastics around the periphery of the central part, thereby creating an elasticized pocket around the intermediate upper / non-woven composite subbodies or the central part. The incorporation of an upward-facing pocket like this can also be conducive to the use of one or more central openings for disposal into the space between the central part and the upper / non-woven intermediate layer.
[0086] [086] The foregoing description of the present invention has been presented for purposes of illustration and description. It is to be noted that the description is not intended to limit the invention to the various articles, products, systems, apparatus and processes disclosed in this document. Various aspects of the invention as described above can be applicable to other types of absorbent articles and disposable garments, and processes for making them. For example, the elastic composite described above can be incorporated into other disposable absorbent garments such as diapers, etc. or in other areas or as other components of the article of clothing. In addition, the processes described by means of figures 1 to 18 can be used to produce compositions, articles of clothing and articles other than those described in this document. Such variations of the invention will become apparent to a person with knowledge of the relevant consumer products provided with the present disclosure. Consequently, variations and modifications commensurate with the previous precepts, and professional knowledge and knowledge of the relevant technique, are within the scope of the present invention. The modalities described and illustrated in this document are intended additionally to explain the best ways to practice the invention, and to enable those skilled in the art to use the invention and other modalities and with various modifications required by the particular applications or uses of the present invention.

权利要求:
Claims (17)
[0001]
Method of making elasticized absorbent pants (101) having a waist opening (132) and a pair of leg openings (104) comprising: continuously applying multiple elastic distributions (210) on a sheet of moving material (212) to form a moving fabric (240) of an elastic composite, where the multiple distributions include a first elastic distribution (210a) and a second elastic distribution (210b); the method characterized by comprising the steps of: periodically applying a central section (105) on the moving fabric (240); applying a second sheet of material (213) on the moving fabric (240) to define a fabric of different elastic composite bodies (136); shaping the elastic composite bodies (136) in absorbent pants (101) with leg openings (104) and waist opening (132), including periodically cutting a section of the moving fabric (240) to define leg openings (104) having elastic annular regions in the vicinity; wherein said continuous application of said multiple elastic distributions (210) includes varying the lateral position of the elastic distribution (210), in relation to the machine direction of the moving fabric (240), as the elastic distributions (210) are. advanced in the machine direction for the moving fabric (240) of the elastic composite, thus forming a series of curvilinear sections of a first elastic distribution (210a) and a series of curvilinear sections of a second elastic distribution (210b), in that the curvilinear sections of the first and second elastic bands (210) converge and diverge mutually and periodically, with each of the first and second elastic bands (210) including multiple mutually spaced elastics; whereby alternating regions that include a first high amplitude region and a second low amplitude region are formed, where the elastics of the first and second elastic distributions (210) are spaced at a maximum distance in the first region and, where , in the second region, the elastics of the first elastic distributions (210a) are positioned closer to the elastics of the second elastic distribution (210b) than in the first region; and wherein the periodic application of the central section (105) to the moving fabric (240) comprises placing the central section (105) in places of the moving fabric (240) corresponding to the first high amplitude regions, through which said elastics continuously cross from the first region through a second adjacent region to a first adjacent region, and, in which, the central sections (105) are applied in locations of the moving tissue (240) corresponding to the high amplitude sections.
[0002]
Method according to claim 1, characterized by the fact that the sheet of moving material (212) is a top layer (TS) of the elastic absorbent pants (101).
[0003]
Method according to claim 1, characterized by the fact that the continuous application of the multiple elastic distributions (210) includes applying a set of elastics on the waist (211a) along an upper edge (203) of the material sheet in movement (212) and a set of elastic bands at the waist (211b) along a lower edge (205) of the moving material blade (212), wherein said first and second elastic distributions (210) are positioned inwardly the waist elastics (211), and, where the waist elastics (211) continuously cross through the moving material blade (212), on which said central section (105) is placed.
[0004]
Method according to claim 1, characterized in that it further comprises the step of periodically cutting one or more of the multiple elastic distributions (210) to create gaps in the elastic distributions, the gaps being pre-located to correspond to the areas in the fabric free from rubber bands.
[0005]
Method according to claim 1, characterized by the fact that each application step includes applying a moving layer element of the elastic composite bodies (136) in a machine direction.
[0006]
Method according to claim 1, characterized by the fact that the continuous application of multiple elastic distributions (210) includes periodically varying the lateral position of the first and second elastic distributions (210) before engaging with the material sheet in movement (212).
[0007]
Method according to claim 1, characterized by the fact that the continuous application of multiple elastic distributions (210) establishes a pair of generally sinusoidal patterns that periodically define elastic annular regions in the moving tissue (240).
[0008]
Method according to claim 1, characterized in that the application of multiple continuous elastic distributions includes applying a set of elastics to the waist (211b) along an upper edge (103) of the moving material blade (240 ) and a set of elastic bands at the waist (211a) along a lower edge (105) of the moving material blade (240), wherein said two curvilinear periodic elastic distribution patterns (210) are positioned into the waist elastics (211) and where the waist elastics (211) continuously cross through the moving material blade (240), on which said central section (105) is placed.
[0009]
Method according to claim 1, characterized by the fact that the material sheet (212) is an upper layer (TS) of the elastic composite fabric (240).
[0010]
Disposable elasticized absorbent article (101) in the form of absorbent pants comprising: an elastic composite body (136) having a lower layer (BS), an upper layer (TS), an absorbent central part (105) between the lower layer (BS) and the upper layer (TS), and multiple elastic distributions (210 ) between the top layer (TS) and the bottom layer (BS), where the elastic composite body (136) has a front end edge (102), a rear end edge (103) and two side part edges ( 106), each having an upper segment, a lower segment and a non-linear cutout section between them; a waist opening (132) defined by the end edges; a pair of leg openings (104), each defined by the cut-out section of one of the edges of side parts (106); and a pair of lateral junctions (130), each defined by the union of the upper and lower segments of one of the edges of lateral parts (106); wherein the elastic distributions (210) are joined at the side joints (130) to form an annular elastic region around each leg opening (104); the article characterized by the fact that the multiple elastic distributions (210) include a first elastic distribution (210a) and a second elastic distribution (210b), and each of the first and second elastic distributions (210) includes multiple elastics mutually spaced between itself, in which the first elastic distribution (210a) and the second elastic distribution (210b) form alternating regions, including a first region of high amplitude, in which the elastics of the first elastic distribution (210a) are spaced at a maximum distance from the elastics of the second elastic distribution (210b), and a second low amplitude region, in which the elastics of the first elastic distribution (210a) are positioned closer to the elastics of the second elastic distribution (210b) than in the first region; and wherein the central absorbent part (105) is positioned in a location corresponding to the first regions of high amplitude, whereby said elastics continuously cross from the first region through a second adjacent region to a first adjacent region.
[0011]
Absorbent article according to claim 10, characterized in that it further comprises a pair of elastic distributions (210) joined at the sealed side edges to form an annular elastic region around the waist opening (132).
[0012]
Absorbent article according to claim 11, characterized in that the elastic composite body (136) includes a pair of elastic distributions (211) extending laterally across the lateral width of the composite body (136) and joined at the sealed edges for form annular elastic regions.
[0013]
Absorbent article according to claim 12, characterized by the fact that the pair of elastic distributions (210) form an annular elastic region coinciding with the central part (105).
[0014]
Absorbent article according to claim 12, characterized by the fact that one or more of the elastic distributions (210/211) pass through the central part (105) which gives them elasticity.
[0015]
Absorbent article, according to claim 10, characterized by the fact that the elastic distributions (210/211) are spaced in the area of the central part (105).
[0016]
Absorbent article according to claim 10, characterized by the fact that the multiple elastic distributions (210) include two sets of intersecting curvilinear periodic patterns of elastic distribution, in which alternating regions of the absorbent article include first regions where the elastics of the two periodic curvilinear patterns of elastic distribution are spaced at a maximum distance, and a second region in which the elastics of a first elastic distribution are positioned closer to the elastics of a second elastic distribution than in the first region; and wherein the central part (105) of the absorbent is positioned in a second region, whereby said elastic bands continuously cross from the first region through a second adjacent region to a first adjacent region, where said central section (105) is placed, to a first adjacent region.
[0017]
Absorbent article according to claim 10, characterized by the fact that the multiple elastic distributions (210) are positioned between the central absorbent part (105) and the upper layer (TS).

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法律状态:
2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-08-20| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-05-05| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|

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2020-08-18| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

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2020-11-24| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-01-12| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/09/2011, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US40348810P| true| 2010-09-16|2010-09-16|

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US61/403,488|2010-09-16|

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PCT/US2011/001607|WO2012036750A2|2010-09-16|2011-09-16|Article with elastic distribution and system and method for making same|

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