• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A tampon-type absorbent is provided for insertion into the vaginal cavity. The tampon type includes a longitudinal direction and has one end for insertion and the other for removal. The absorbent buffer includes a portion of an absorbent material at the insertion end for collecting body fluids and demonstrating the expandability of the first layer, a second layer for the absorbent material at the removal end for storage of body fluid, in addition to expansion capacity of the second layer. The second portion of absorbent material is partially wrapped around the first portion of absorbent material in a transverse (perpendicular) direction to the longitudinal direction, in a joining region, where the first portion of the absorbent material is joined to the second portion of absorbent material , in the union region.
    公开号:BR112013028480B1
    申请号:R112013028480-3
    申请日:2012-05-01
    公开日:2021-02-09
    发明作者:Alexander Schmidt-Foerst；Mary L. Mcdaniel；Charles R. Tomsovic；Garry R. Woltman
    申请人:Kimberly-Clark Worldwide, Inc.；
    IPC主号:
    专利说明:

    PRIORITY
    This non-provisional application claims the priority of Provisional Application No. 61/482883, filed on May 5, 2011.
    The entirety of Order No. 61/482883 has been incorporated into this document by reference. FIELD OF INVENTION
    The invention relates to personal care products, more specifically body cavity inserts, such as menstrual tampons and absorbent structures used in such inserts and tampons. BACKGROUND OF THE INVENTION
    There are two basic types of menstrual tampons currently used for feminine hygiene available on the market, individually designed to offer discreet and comfortable protection. The first type is a digital plug, which is designed as an absorbent structure to be inserted into the body cavity, such as the female vagina, directly by the user's fingers. The second type is a plug that must be inserted with the help of an individual applicator. Such applicators are typically made of cardboard or polymeric materials. The two types of plugs can be manufactured by folding or wrapping a strip or tape of absorbent material in elongated shape or in another shape, such as a "W", "V", or in the shape of a cup, often called "compress" or "softwind", in the case of a rolled ribbon. This is described in U.S. 5,533,990 from Yeo. In this case, the softwind has a compressed shape both radially and axially to form the processed tampon-type absorbent. There is a description of a method for making a radially rolled absorbent described in U.S. 4,816,100 to Friese. The radially rolled softwind can be compressed into a compacted absorbent, as described in Friese U. 6.310.269.
    A compressed absorbent structure is also known in the patent art as a "cylindrical pad". In alternative designs of plugs with a cylindrical pad, as described in US 6,837,882 and US 20080132868, by Jorgensen, the cylindrical pad consists of a V-shaped structure and is then compressed or has a shape with overlapping layers perpendicularly compressed / molded into a bowl. Suitable methods used to manufacture cylindrical "W" or "V" shaped pads are disclosed in US 6,740,070 from Agyapong, US 7,677,189 from Kondo and US 2010/0114054 from Mueller. All previous patents have been fully incorporated by reference in this document.
    The cylindrical pad described above may or may not include a cover to facilitate the retention of the absorbent material after compression. In both types of tampons (manual or with applicator), a removal strip will be attached to the absorbent, before or after compression, to facilitate the removal of the tampon or insert from inside the user's vagina or another orifice after absorbing a certain amount of body fluid, such as urine, menstrual flow, blood, etc. The strip for removal can be physically attached to the absorbent, using a fixation method, such as stitching, mechanical, thermal, adhesive or other means, or alternatively, instead of being physically attached, it can simply be wrapped around the absorbent or part of it, during the manufacturing process, and a strip may be hung on one end of the tampon (sometimes called a "tampon" of the tampon).
    As the various types of tampons described above are saturated by menstruation, they expand in various formats, depending on the structure of the initial tampon. In addition, it was found that many of these tampons with different formats, both manually inserted and those with an applicator, generally fail to prevent the premature leakage of body fluid, which is the leakage of menstruation from the user's vagina before complete saturation of the tampon-type absorbent. Premature leakage, which often results from inefficient use of the product's absorptive capacity, can be the result of a number of factors. For example, one of the factors is that the tampon does not fit correctly above the introital region of the vagina. Another factor is that the tampon is not properly shaped to intercept the flow of fluid through the vaginal canal. We can also mention that the folds and circumvolutions of the vagina are not completely in contact with the tampon and, in this case, the body fluid may leak through the tampon. Still, another reason for the leak is the absorbent fiber or layered structure of the tampon, as the design of the tampon itself inadvertently interferes with the maximum absorption of menstruation. Another factor to consider is the residual menstruation that accumulates at the end of the tampon during the withdrawal process and that flows from the vagina at the beginning of the tampon removal. Therefore, even if the tampon is modeled to prevent leaks during use, it was found that leakage may occur during the removal of the absorbent tampon.
    In addition, the pressure of the insert in the absorbent tampon may be different if the absorbent or digital tampon is of the digital or applicator type, in which case there is a need for an absorbent structure that can provide leak protection for various types of tampon formats. An absorbent plug is needed that can provide the necessary strength to accommodate the digital insert and applicator and still allow leakage protection.
    It was also found that absorbent tampons cannot provide predictable comfort during use or withdrawal due to the expansion of their shape during the time of use. For example, absorbent plugs made of a material with a single strip or strips of substantially overlapping materials sometimes presented the inappropriate custom fit. Even when single-strip absorbent plugs or substantially overlapping layer materials have a shape or are mechanically manipulated, it was also found that the customized handling of the fluid and its fit was inadequate.
    The patent literature related to tampons explored the use of different elements that restrict the expansion of the absorbent tampon design. For example, several techniques have been described for creating different forms of expansion for the components of the manually inserted plug. For example, a number of restrictive elements have been used to wrap the removal end of the absorbent tampon and also to limit the expansion of the tampon in this area. The literature indicates that by maintaining a smaller removal diameter after use, such tampons could easily be removed from the vaginal canal, causing less discomfort for the user. See, for example, restrictive elements in Pat. US No. 2,330,257 to Bailey; 3,038,214 Griswold et al .; and JP 2004-097304, EP 1481656 and EP 2184044. Some of the restrictive elements described include strips, rings or casing made of moisture-proof materials that completely and firmly waterproof the end of the absorbent plug. Some of the hydrophobic or liquid-proof casings described are also designed to form a cap at the end of the withdrawal, thereby limiting leakage during the removal of the absorbent plug. Another example of a wrapper can be seen in WO2005 / 048901. Other methods for creating restrictive regions include the use of injectable hydrophobic materials, which limit the amount of menstruation that can be absorbed in specific areas of the absorbent pad. For example, restrictive expansion using compounds impregnated in parts of the absorbent buffer structure is described in Chaffringeon US 2008/0154222. The use of specific segmented grooves, gaps or discontinuities across the length of the absorbent buffer has differences in relation to fluid handling or improvements in the absorbent buffer channel in various regions thereof, which are described in U.S. 20110092940 by Fung et al. In this regard, U.S. 20080262463 by Noel et al can also be consulted. Even with the variation of the design related to the restricting elements of the absorbent tampon, there is still a need for absorbent tampons that offer a more efficient use of its entire structure.
    Some patent references also describe the use of various types of folds - influencing characteristics across the length of the absorbent pad, as described in US 2,858,831 by Graham, Jr. Such features include fiber orientation and segmentation / discontinuities presented by the disc. Even with such flexing characteristics, it is still necessary to improve the comfort of the tampon-type absorbers.
    While various types of buffer-type absorbent reinforcement structures or restrictive structures have been described in the previous references, these references focus on the use of structures with a single strip or wrappers with absorbent layers, in which the absorbent layers are substantially positioned on top of each other over the entire length of the tampon, so that the type (s) of absorbent across the final length of the absorbent tampon (facing the vaginal canal) is essentially the same across the entire length dimension, with the exception of tampons absorbents with topographic patches (or plumbing) of different materials. Essentially, these absorbent plugs demonstrate the similar functionality of the absorption along its entire length and are formed by joining in the longitudinal direction of the plug. In addition to the functional disadvantages of such structures, the manufacturing processes for creating these structures present challenges regarding the registration of the layer.
    There is still a need for a tampon and a tampon-based product that prevents leakage of body fluid right after it is inserted into the woman's vagina, with the provision of efficient use of the entire absorbent structure during use, without the use necessary blocking of foreign agents or chemicals or physical structures, and it also provides comfort for the woman, during various daily activities. SUMMARY OF THE INVENTION
    An absorbent tampon is provided for insertion into the vaginal cavity. The absorbent tampon has a longitudinal direction and has one end for insertion and the other for removal. The absorbent plug includes a portion of an absorbent material at the insertion end, for collecting body fluids and demonstrating the expandability of the first layer, and also a second layer for the absorbent material at the removal end, for fluid storage. body, in addition to demonstrating the ability to expand the second layer. The second layer of the absorbent material is partially rolled up in the first layer of the material, in the direction transverse to the longitudinal direction, to promote the bonding of the material, while the first absorbent layer of the material is joined to the second layer in the region of the conjunction.
    In another embodiment of the invention, the tampon, which is used as an insert in the vaginal cavity, will be provided and includes the absorbent tampon. The absorbent pad includes a longitudinal direction and has one end for insertion and the other for removal. The absorbent buffer includes a portion of an absorbent material at the insertion end for collecting body fluids and demonstrating the expandability of the first layer, and a second layer for the absorbent material at the removal end for storing body fluid, in addition to the expansion capacity of the second layer. The second layer of the absorbent material is partially wound around the first outer surface of the absorbent material in a joining region. The first layer of the absorbent material will be joined to the second layer of the absorbent material in the joining region, and the strip for removal will be wrapped around the tampon-type absorbent.
    Another embodiment of the invention has a method for the manufacture of the absorbent buffer, which includes the steps, as follows: 1) supply of a tape of the first layer of the absorbent material and the second layer of the same, each tape should have a longitudinal direction, 2) positioning the tape of the second layer so that one end is superimposed on the end of the tape of the first layer of the absorbent material, forming an overlap of the two tapes in the transverse direction, in the longitudinal direction of the tapes, 3) folding of the tape of the second absorbent material around the edge of the tape of the first layer of the absorbent material, through the folding piece, 4) joining the tape of the first layer of the absorbent material to the tape of the second layer at the point of overlapping of the tapes thus forming the union region.
    In a further step of the embodiment of the invention, a specific method of producing a tampon can also include steps of 1) first providing a tape of a first absorbent material and a second absorbent material, all having a longitudinal direction and a transverse direction, 2) position the tape of the second absorbent material, so that its ends are juxtaposed on the end of the tape of the first absorbent material in the perpendicular (transverse) direction, in the longitudinal direction of all the tapes thus forming an overlap of the two tapes, 3) fold the tape of the second absorbent material around the end of the tape of the first absorbent material, through a folding plate, 4) join the tape of the first absorbent material with the tape of the second absorbent material in the overlap thus forming a union region, 5) rotating the tapes of the absorbent compound material, 4) an axis located in parallel with the longitudinal direction of the tapes joined together to form a roll or cylinder of the buffer, usually called a tampon pad, 6) inserting the tampon pad into a tampon compression section of a press commonly used for tampon manufacturing, 7) compressing mainly so radial compress the plug in the press to form a plug.
    In yet another stage of the embodiment of the invention, the tampon-type absorbent used as an insert in the vaginal cavity has a longitudinal direction, including an insertion end and another for removal. The tampon-type absorbent includes a first absorbent region at the end of it, to store the body fluid and demonstrate the initial expansion capacity. A second absorbent region is located at the removal end for storing body fluid and then demonstrating the ability to expand. A third absorbent layer is located between the first and the second absorbent layers in the longitudinal direction, the first absorbent region being joined to the second absorbent region, in the third absorbent region.
    In yet another stage of the embodiment of the invention, the absorbent pad used as an insert in the vaginal cavity has a longitudinal direction, including an insertion end and another for removal, in the transverse region. The absorbent pad includes a first absorbent region at the insertion end, to store the body fluid and demonstrate the initial expansion capacity. A second absorbent region is located at the removal end for storing body fluid and then demonstrating the ability to expand. A third absorbent layer is located between the first and the second absorbent layers in the longitudinal direction, the first absorbent region being joined to the second absorbent region, in the third absorbent region.
    In yet another embodiment, parts of the absorbent material have different colors. In yet another embodiment, the first layer of the absorbent material has an initial color, the second layer of the absorbent material has a secondary color and the joining region, which joins the two layers of the absorbent material, has a third color, which is a mixture of the first and second colors. In another embodiment, the colors of the parts of the absorbent material can be seen through the upper layers of the absorbent buffer.
    Each absorbent region preferably demonstrates different absorption characteristics, including expandability, stiffness and density. This three-layer region, with the transverse directional union, offers unique performance characteristics in three different locations along the entire length of the tampon.
    Therefore, in a certain aspect, this absorbent pad provides two pieces with absorbent material in the longitudinal direction of the absorbent pad. These two pieces of absorbent materials provide more moisture sensitive layers (with greater expansion capacity) to the end of the absorbent buffer and the lower part that is sensitive to moisture (with less expansion capacity) for the final removal of the absorbent. By joining the two parts of the absorbent material in a transverse direction in the longitudinal direction, the junction in this region creates a hinge or a point of flexion, thus allowing the two parts to bend in the direction of the others (in the longitudinal direction), providing the comfortable use of it. The use of several moisture sensitive parts allows the absorbent tampon to physically accommodate the non-cylindrical aspects of the vaginal canal. This allows the comfortable insertion (with sufficient columnar strength) of the tampon-type absorbent, as well as its comfortable removal, while the product maintains its shape according to its characteristics, reducing leakage. DETAILED DESCRIPTION OF THE ILLUSTRATIONS
    Figure 1 shows a side view of the finished product of the plug, according to the specifications of this invention, with the plug in the initial state of use.
    Figure 2 shows a side view of the tampon in Figure 1, showing the expansion characteristics of the tampon during use within the vaginal canal.
    Figure 3 shows a side perspective view of the plug shown in Figure 1, which demonstrates the ability to flex and bend the plug around a specific region for joining during use.
    Figure 4 shows a perspective view of an absorbent compound joined with two tapes and that makes up the absorbent buffer, before the compound is rolled up in a softwind (and absorbent of the buffer type).
    Figure 5 shows a perspective view of part of the alternative embodiment of the tapes attached to the attached absorbent compound of Figure 4, before the compound is rolled up in a softwind (and tampon-type absorbent).
    Figure 5A shows a perspective view of part of the alternative embodiment of the absorbent compound joined with two tapes of the Figure, before the compound is wound in a softwind (and tampon-type absorbent).
    Figure 6 shows a cross-sectional view of a part of a rolled softwind made with tapes of absorbent compound joined, according to the specification of this invention (like the softwind shown in Figure 9, at 147).
    Figure 7A shows a cross-sectional view of a part of the alternative embodiment of a part of the rolled softwind, made of an absorbent compound joined with two tapes, according to this invention (like the softwind shown in Figure 9, at 147 ).
    Figure 7B shows a cross-sectional view of a part of the alternative embodiment of a part of the rolled softwind, made of an absorbent compound joined with two tapes, according to this invention (like the softwind shown in Figure 9, at 147 ).
    Figure 7C shows a cross-sectional view of an alternative embodiment of part of a rolled softwind, made of an absorbent compound joined with two tapes, according to this invention (like the softwind shown in Figure 9, at 147).
    Figure 7D shows a cross-sectional view of an embodiment of part of a rolled softwind, made of the absorbent compound joined with two tapes, according to this invention (like the softwind shown in Figure 9 in 147).
    Figure 7E shows a cross-sectional view of an alternative embodiment of part of a rolled softwind, made of an absorbent compound joined with tapes, according to this invention (like the softwind shown in Figure 9 in 147).
    Figure 7F shows a cross-sectional view of an alternative embodiment of part of a rolled softwind, made of an absorbent compound joined with tapes, according to this invention (like the softwind shown in Figure 9, at 147).
    Figure 7 shows a partial top view of an alternative embodiment of the two-banded absorbent compound of Figure 4.
    Figure 7H shows a partial top view of an alternative embodiment of the two-banded absorbent compound of Figure 4.
    Figure 8 shows a top view of the embodiment of the attached absorbent compound used for the manufacture of the absorbent buffer of this invention, before the winding of it in the softwind and before the introduction of the softwind in a machine to compose the plug / compression machine. of the tampon to compress the tampon in the grip of a press.
    Figure 9 shows a flow chart of an absorbent tampon manufacturing process, using the absorbent tampon of this invention.
    Figure 10 shows a photomicrograph of a sample with a thickness of 70 microns from a cross section of a softwind-type absorbent of this invention.
    Figure 11 shows a photomicrograph of a sample 70 microns thick from a radially compressed softwind section (like the final processing digital buffer) of this invention. DEFINITIONS
    It should be noted that when used in accordance with these specifications, the terms "comprise", "comprising" and other variations of the main term "comprise" should be considered as open terms that specify the presence of any mentioned resources, elements, numbers integers, steps or components and are not intended to prevent the presence or addition of one or more other characteristics, elements, integers, steps, components or respective groups.
    As used here, "disposable" means disposal after a single use and is not intended to be washed and reused.
    As used herein, the term "autogenous bond", "autogenously bonded" and similar forms of use of this word, bonding means provided by the fusion and / or self-adhesion of fibers and / or filaments without the application of an external adhesive or agent of union. The autogenous union can be provided by the contact between fibers and / or filaments, while at least a part of the fibers and / or filaments is semi-fused or fixed. The autogenous union can be predicted by mixing a taching resin with the thermoplastic polymers used to form the fibers and / or filaments. Fibers and / or filaments formed from a mixture of this nature can be adapted to the automatic connection with or without the application of pressure and / or heat. Solvents can also be used to fuse fibers and filaments that remain after removing the solvent.
    As used herein, the term "transverse" or "transverse" and similar forms of these words mean the plane that extends laterally through the plug, and which is orthogonal to the longitudinal axis of the plug or absorbent plugs.
    For the purposes of this application, the term "plug" should refer to the structure of "absorbent plugs" and the additional structures associated with the absorbent structure, such as the withdrawal sequence and the applicator, as appropriate. The term "absorbent tampon" should refer to an absorbent compound made up of tapes, small compresses or softwinds and a cover, if any. The absorbent will be composed in an execution form with two tapes in a joined absorbent compound. A "processed as a finished product" plug should be synonymous with a plug and should illustrate the completed and ready-to-use manufacturing phase.
    For the purposes of this application, tampons, tampon-type absorbents, bonded absorbent compounds, cylindrical pads and bonded absorbent materials that make up the bonded absorbent compounds will have their use described as "insertion" and "removal" ends. The term "insertion" refers to the effect of the tampon, absorbent tampon, cylindrical pad or tape of absorbent material that is initially inserted into the user's vagina. The term "removal" end refers to the effect of the tampon, absorbent tampon, cylindrical pad or tape of absorbent material that is initially removed from the user's vagina and which may be accompanied by a withdrawal sequence (in the case of a tampon). The plugs, absorbent plugs, cylindrical pads and strips of absorbent materials described in this document, will have a longitudinal direction and transverse direction or width (which is perpendicular to the longitudinal direction (axis). After the winding and compression of the absorbent strips / absorbent plugs described in this invention, the longitudinal direction of the pads / tapes will have the longitudinal direction of the plug. It should be noted that while it is rolled and the compressed absorbent pad is composed in the form of execution, the invention will also contemplate the use of the alternative structure of the cylindrical pad. as described above.
    As used here, the term "diameter" and similar forms of this word mean the transverse diameter of the plug.
    As used herein, the term "polymer" generally includes, but is not limited to, homopolymers, copolymers, such as block, graft, random and alternate copolymers, terpolymers, etc. and their mixtures and modifications. In addition, unless specifically contrary to this, the term "polymer" will include all possible geometric configurations of the material. These configurations include, but are not limited to, isotactics, syndiotactics and random symmetries.
    The frequent use of the reference characters in the present specification and drawings will represent identical or analogous features or elements of the invention. It should also be recognized that the elements of one form of execution can be placed in other forms of execution, unless otherwise indicated. DETAILED DESCRIPTION OF THE INVENTION
    The disposable tampon and tampon-type tampon (made of joined absorbent compounds) of the present invention have been developed to be inserted above the introitus region of the vagina, desirably above the pelvic fundus muscles, and have been developed to function in order to accept the flow of menstruation fluid, blood and other body fluids and prevent the fluid from leaking out of the vagina or other body cavity. The buffer-type absorbent of this invention is prepared from at least two portions of different absorbent materials (desirably from two different absorbent tapes), which combined form a unified absorbent compound by means of a joining region. We draw your attention to the images for a better understanding of the portions of absorbent material used to prepare the buffer-type absorbent of this invention.
    As shown in Figure 1, one of the embodiments of the absorbent 10 of this invention includes an absorbent of the plug type 90 rolled up and then compressed into a generic cylindrical shape as illustrated, with insertion tip 11 and removal tip 15.
    In this figure, the plug 10 also includes a cap 16, which does not completely cover the entire region of the tampon type 90, and with string 34.
    As can be seen in the figure, the cover 16 does not cover the rounded tip of the absorbent at the insertion tip, however it is understood in the direction of the same or for the removal tip. Some forms of execution contemplate that the cover also extends to cover the entire insertion tip or alternatively extends beyond the removal tip to form an absorbent skirt (not shown), which is suspended from the removal tip 15.
    The tampon-type absorbent generally includes a first absorbent portion 12, made of a first absorbent material and located in the direction of the insertion tip 11, and a second absorbent portion 14, made of a second absorbent material, and located in the direction of the removal tip 15.
    The tampon-type absorbent (and necessarily the tampon, joined absorbent compound and tapes) each includes a longitudinal direction (axis) 70 and transverse direction (axis) 80 perpendicular to the longitudinal direction (as clearly seen in Figure 4). The string 34 (also seen in Figure 9) in one of the forms of execution, wrapped around the absorbent type buffer 90 and suspended from the removal tip 15 of the buffer 10.
    The transverse directional joining region 13 fixes the portion of the first buffer material 12 to the second portion of absorbent material 14.
    The bonding region essentially connects the bonded absorbent compound.
    The region of the transverse directional joint 13 is desirably formed using only pressure. For example, a pressure between 2000 (53PSI / 3.7 Bar) and 2500 lbs. (65 PSI / 4.5 Bar) of force (8896-11,121 N) can be used between two joining cylindrical rollers (anvil and standard rollers) to join the portion of the first absorbent material with the portion of the second absorbent material. Alternatively, heat and pressure can be used to join the absorbent portions together. In another form of execution, individually or collectively, heat, pressure, adhesive, ultrasonic, mechanical interlacing or other autogenous joining techniques can be used to connect the two absorbent portions. The joining region 13 can include any number of pattern elements, although a series of flowers 22 is shown in the embodiment of Figure 1. Other potential joining element designs include staggered points or dashes as seen in Figures 5 and 5A, curved joining lines, or a combination of abstract, geometric or realistic joining shapes and objects. As shown, the plug 10 desirably also includes recessed slits 19, configured in all of its longitudinal direction (or axis) 70, having been created by a traditional radial or biaxial plug compression equipment. The cover 16 may, in an embodiment, be translucent or semi-translucent, to allow observation of the internal absorbent layers (as shown in the figure that allows the visualization of the portion of the second layer of the absorbent), or it may be opaque to help hide the stains in the inner layers of the buffer. The cover layer optionally does not completely envelop the absorbent compound as can be seen in the figure, although it can cover all external surfaces if desired. In the initial stage, as would be seen by a consumer before use, a processed / finished absorbent would include a general cylindrical shape with uniform diameter X1 in the longitudinal direction 70, except for the insertion point 11 which desirably ends with a rounded, cone-shaped tip , hemispheric or parabolic. In one embodiment, as shown in Figure 1, the portion of the second absorbent material 14 can be of a different color or appearance than the portion of the first absorbent layer 12, as seen by the translucent layer 16.
    As seen in Figure 2, when in use, the plug 10 of this invention was developed to be positioned inside the vagina 19, desirably on the muscles of the pelvic base, in order to conform the non-straight line of the vaginal canal. During use, the portion of the first absorbent material 12 demonstrates a first expansion and the portion of the second absorbent material 14 demonstrates a second expansion, while the expansion of the first is often much greater than the expansion of the second. In one embodiment, the joining region 13 demonstrates a capacity for expansion, density and absorption different from that of the first, as well as the second absorbent material.
    It is possible that the portion of the second absorbent material 14 expands before the portion of the first absorbent material 12. Expansion of the portion of the second absorbent material does not necessarily depend on the expansion of the first buffer, and can open out independently. In one embodiment, the expansion of the portion of the first absorbent material 12 can increase under free swelling conditions (without retaining walls surrounding the plug) by approximately 233% or less. For example, the diameter of the portion of the first absorbent material 12, excluding the rounded tip, can expand from approximately 12 mm to 28 mm, when measured at the widest point. The expansion of the portion of the second absorbent material 14 is often light X2 in relation to the diameter X1 of the portion of the second compressed original absorbent material. In any case, the portion of the first absorbent material 12 normally expands to a final diameter larger than the portion of the second absorbent material 14. In one embodiment, the rate of expansion of diameter, excluding the rounded tip at the insertion point, between the portion of the first buffer material 12 (at the widest point in the transverse direction) and the portion of the second absorbent material 14, at the widest point in the transverse direction, is approximately 1: 0.9 to 1: 0.5. In the second embodiment, the expansion rate between these two portions is approximately 1: 0.75. In one embodiment, absorbent type 10 shows absorbent capacity of less than 6 g as measured by Edana's Syngenta test method of 350.0-02 (February 02). In other alternative embodiments, the absorbent type absorbent 10 demonstrates an absorption capacity between 6 and 9 g, between 9 and 12 g, between 12 and 15 g, or between 15 and 18 g.
    When in use, the tampon demonstrates the ability to bend and twist along a line of flexion above the joining region 13 (in position along the portion of the first absorbent material 12 towards the insertion tip), to offer comfort to the user during daily activities and to conform to the vaginal canal if necessary. This flexion is illustrated in Figure 3, where the portion of the first absorbent material 12 is shown in the folded position with respect to the longitudinal direction 70 (axis) of the plug 10. The plug retains a narrower diameter in the portion of the second absorbent material at the tip of removal 15 for easy removal. The plug 10 demonstrates columnar resistance to allow for comfortable insertion and removal.
    The plug 90 (and tampon type 10) of this invention therefore includes three different absorbent regions along the longitudinal direction 70. The first region is composed of the portion of the first absorbent material 12, the second region is composed of the joining region 13 ( with the joining occurring in the transverse direction of the tampon / tampon), which includes an overlap of the portion of the first absorbent material 12 and the portion of the second absorbent material 14, and the third region, which includes only the portion of the second absorbent material 14 All three regions demonstrate different absorption capacities and properties, such as expandability and density. all of these regions offer absorption capacity, while still offering a unified design, the ability (of the plug) to flex during the user's movements and a restricted-expansion removal tip to allow removal in comfort. Essentially, along the longitudinal direction of the tampon-type absorbent and the tampon 70 produced therein, there are three different absorbent regions, with different properties and composed of three different material configurations.
    As noted, Figure 4 illustrates a perspective view of the two-banded tampon-type absorbent compound of Figure 1, before wrapping it up and being compressed into a process-type tampon-type absorbent, in a cylindrical configuration. The combined absorbent compound is essentially shown in the flat state. As can be seen in this figure, the portion of the first absorbent material 12 is in a partial "Y" configuration formed from the portion of the second absorbent material 14. Desirably, in an embodiment, an empty space or cavity 21 is positioned adjacent the first absorbent 12 towards the removal tip 15. Desirably the portion of the first absorbent material 12 is an individual layer 20, such as carded mesh material, and the portion of the second absorbent material 14 is an individual layer 18 that partially wraps a portion of the portion of the first absorbent material 12 in the areas 17. The portion of the second absorbent material 14 at the removal tip 15, forms the cavity 21 between two segments of the folded layer 18, as a result of the manufacturing process. Alternatively, during manufacture and the subsequent compression process, the portion of the second absorbent material 14 may be bent tightly so that it is well aligned with the lower edge of the removal tip of the portion of the first absorbent material 12, and in fact making contact, so that there is no cavity present, but there is still a portion of the second lower absorbent material 14 which is suspended from the portion of the first absorbent material 12 without overlapping it. This can be seen, for example, in Figure 7D. Desirably the portion of the second absorbent material 14 is a joined carded mesh. As shown in Figure 4, the portion of the second absorbent material 14 can be a single continuous layer wrapped around the edge of the portion of the first absorbent material 12 in a transverse direction to the longitudinal direction of the plug. A section of the folded second absorbent 14 does not overlap the portion of the second absorbent material 12 along the longitudinal direction 70, but is suspended adjacent (along the length 27), forming the removal tip 15 of the plug. The portion of the second absorbent material 14 is joined to the portion of the first absorbent material 12 in the bonding region 13, shown in this figure using the floral bonding pattern 22. This bonding occurs on the surfaces of the portion of the first absorbing material 12 and surfaces internally turned from the portion of the second absorbent material 14.
    In one embodiment, the size of the first absorbent 12 in the longitudinal direction 23 (as measured from the tip on the insertion tip portion of the first absorbent material 11, to the tip close to the portion of the first absorbent material 12 on the removal tip 15, is approximately between 15 and 50 mm. In a second embodiment, the size of the first absorbent 12 in the longitudinal direction is approximately between 40 and 45 mm. Depending on the overlap of the portion of the first absorbent material 12, by the portion of the second material absorbent 14, it is likely that only 30 mm of the portion of the first absorbent material 12 is visible from the outside of the plug 10. In another embodiment, the size of the side layers 60 of the portion of the second absorbent material 14, in the longitudinal direction , 24 as measured from the exposed edge 50 of the joint region 13 to the portion of the second absorbent material on the edge of the removal tip 15, is between 5 and 35 mm. As a result, the size of one of the side layers of the portion of the second absorbent material 14 in the longitudinal direction 24 is between plus and minus 20 and 25 mm. Preferably, the size of the joining region 13 in the longitudinal direction 25 is approximately between 3 and 35 mm. Even more desirable that the size of the joining region 13 in the longitudinal direction 25 is approximately between 7 and 15 mm. The joining region 13 helps to create a flexion zone just above it in the longitudinal direction, in the direction of the insertion tip 11, which offers a folding tip in the tampon and in the tampon. With the portion of the second absorbent material 14 not expanding to the portion of the second absorbent material 12, the two portions of absorbent material that project from the two sides of the flexion zone, a fold point is formed.
    The size of the cavity 21 (if present, typically in the wrapped state of the plug) in the longitudinal direction 26 adjacent the removal tip 12 of the portion of the first absorbent material, and formed from the two side layers 60 of the portion of the second absorbent material 14, is between more or less 0 and 40 mm, in an execution form. In a second embodiment, the size of this cavity 21, if present in the format in the longitudinal direction, is between about 5 and 20 mm. More desirably, the size of the cavity 21, if present in the shape in the longitudinal direction 26, is between about 5 and 13 mm. Cavity 21 is typically not present in the compressed state of the plug, although in theory it should reopen when expanding / absorbing body fluids.
    As indicated, in an embodiment following manufacture, the tampon and tampon-type tampon produced from it does not include the cavity, but instead has the second tampon in contact with the first tampon instead of the cavity (as seen in Figure 7D, na114). In one embodiment, the size of the side layers 60 of the second absorbent 14 that do not overlap with the portion of the second absorbent material 12 in the joining region 13 is between 3 and 40 mm in the longitudinal direction 27. Alternatively, their size in the longitudinal direction 27 is between about 5 and 20 mm. Desirably the degree of overlap between the portion of the first absorbent material 12 and the portion of the second absorbent material 14 in the longitudinal direction (in the joining region) is between 5 and 70% of the total length of the plug 90 in the longitudinal direction (the sum of 23 and 27). The cavity 21 is desirably present in a processed format of absorbent compound attached to the tape base to capture fluids during use.
    As seen in Figure 4, the second absorbent material portion 14 can include a dye (shown with shading) in order to distinguish the two absorbent portions. In such a case, the functionality different from the two portions is highlighted to the user. If dye is used in the portion of the second absorbent material 14, it is desirable in an embodiment that the rate of coloring of the portion of the second absorbent material for the non-colored portion of the first absorbent material visible on the surface of the tampon-type absorbent is between 90% / 10% and 10% / 90%. In another embodiment, it is desirable that the visible ratio of the portion of the second absorbent material to the portion of the first absorbent material is more or less 40% / 60%. In another alternative embodiment (not shown), all first and second portions of absorbent material would include a different dye. In this form of execution, the layers of different colors overlap the joining region 13, thus producing a third color in the joining region as a result of the overlap. For example, if the first absorbent is yellow and the second absorbent is blue, the joining region would turn green to the observer due to the observer's brain mixing yellow with blue through observation. This three-color layer arrangement can be used to offer a message to the consumer about the three different absorption regions in the longitudinal direction 70 of the tampon. The joining of the two colored regions in one joining region to obtain a third colored region in the joining region, can be achieved using thermal, autogenous, ultrasonic or adhesive bonding.
    As seen in Figure 5, in an alternative embodiment of absorbent compound joined to the tape base of Figure 4, the first absorbent material portion 12 is compressed prior to manufacture in the absorbent compound, with a compression pattern, such as a corrugated pattern 28 , hexagonal pattern, or beehive pattern (not shown). Any number of buffer compression patterns are envisioned to help create a more cohesive absorbent structure in general. In addition, the portion of the second absorbent material 14 can also be compressed, such as with the embossing pattern with diamond shape 29. These ripple and diamond patterns can increase the overall cohesion of the plug, and therefore that of the type absorbent. plug. The joining region 13 can include an exposed edge 50 that is not straight, such as a cutout, zigzag, wavy, or other curved edge design instead of the exposed straight edge illustrated in Figure 4. Alternative joining patterns, such as the alternating pattern of points 51 can be used in the joining region 13. Additionally, in an alternative embodiment, as seen in Figure 5A, staggered joining point patterns, such as a series of four staggered points 52 and two staggered points 53 can be used. Desirably the joining surface area of the joining patterns in the joining region 13 is between plus and minus 5 and 100% (100% in the case of smooth joining rollers). In an alternative embodiment, the bonding surface area of the bonding patterns in the bonding region 13 is between 5 and 70%. Still in an alternative embodiment, the bonding surface area of the bonding patterns is between about 5 and 25% of the surface area of the bonding region 13. In one embodiment, the bonding pattern includes bonding patterns. point with 1-2 mm diameter point. In another embodiment, the length of the joining region 25 in the longitudinal direction is more or less 5 mm. The area of the joining surface is considered to be the overlapping regions 17 between the portion of the second absorbent material 14 and the portion of the first absorbent material 12 in the longitudinal direction shown in 25.
    As can be seen in Figure 6, a stylized partial cross-sectional view of shape 147 from an absorbent compound joined to the base of two tapes, (in the longitudinal direction) of Figure 9 is shown. The cover 16 partially surrounds the outer edges of the portions of the first 12 and the second 14 absorbent material. The folds or lobes of the two tapes (portion of the first absorbent material 12 and portion of the second absorbent material 14) are separated by spaces in the shape, which when compressed in the finished buffer in process are not apparent. Additionally, even if not shown, spaces adjacent to the joining regions 13 are also present between the lobes in the shape. As the compressed tampon is put into use, and expands due to the absorption of fluids, the spaces between the lobes and the joining regions, as well as the cavities, re-emerge in the structure to capture body fluids.
    As can be seen in Figure 7A, which illustrates a cross-sectional view of an alternative 147-shaped embodiment, instead of having side layers 60 of the portion of the second absorbent material14 being of a continuous layer that wraps around the edge of the tip of removing the portion of the first absorbent material 12 (as shown in Figures 4, 5, and 6), two continuous layers 61 of the portion of the second absorbent material 14, are on either side of the portion of the first absorbent material 12, at the tip removal 15 (forming the “Y” bottom) of the first absorbent layer 12.
    As can be seen in Figure 7B, in an alternative alternative embodiment, as illustrated in the cross-sectional view, the portion of the second absorbent material 14 can be folded around the edge of the portion of the first absorbent material 12, so that the longitudinally overlapping portions 110 and 111 of the second absorbent material portion 14 are not symmetrical at the opposite side edges of the first absorbent material portion.
    As seen in Figure 7C, in another embodiment of the shape portion 147 shown in cross-sectional view, the portion of the second absorbent material 14 can be positioned along the edge 112 of the portion of the first absorbent material 12 in the longitudinal direction 70, so that the “Y” configuration is only formed when rolling and compressing the attached absorbent compound.
    As seen in Figure 7D, in another embodiment, shown in cross-sectional view, the portion of the second absorbent material 14 can be positioned close to the portion of the first absorbent material in the joined absorbent compound. In this alternative structure, the location of the joined absorbent compound that has been previously described as including cavity 114, does not include the cavity or includes one that is barely present in the shape, and further reduced or eliminated entirely during the subsequent manufacturing compression steps. .
    As seen in Figure 7E, in another embodiment of the shape portion, shown in cross-sectional view, the portion of the second absorbent material 14 can be positioned along only a few alternative edges of the portion of the first absorbent material 12 in the longitudinal direction 70, so that the “Y” configuration is only formed by rolling and compressing the attached absorbent compound.
    As seen in Figure 7F, in another embodiment of the shape portion, shown in cross-sectional view, the portion of the second absorbent material 14 can be positioned along only a few alternative edges of the portion of the first absorbent material 12 in the longitudinal direction 70 and include a partially folded region, so that the “Y” configuration is only formed by rolling and compressing the joined absorbent compound.
    As seen in Figure 7G, in another embodiment, as seen from the top surface plan of the two joined tapes, the tape of the portion of the first absorbent material 12 may not have the same dimensions in the transverse direction 80 as the tape of the portion of the second absorbent material 14.
    As seen in Figure 7H, in another embodiment, as also seen from the upper surface plan of the tapes, the tape of the portion of the first absorbent material 12 may not have the same orientation in the transverse direction 80 as the tape of the portion of the second absorbent material 14.
    As seen in Figure 8, the absorbent compound joined to the base of two tapes 100 which is subsequently rolled and compressed using traditional buffer formatting technology, is desirably formed first of two separate tapes 31, 32 on a tape calendar and folding plate 30 The first tape 31, which forms the portion of the first absorbent material, is fed to the foldable plate concurrently with the second tape 32 which forms the portion of the second absorbent material. The foldable plate proceeds to fold the second tape 32 of the portion of the second absorbent material around the edge and sides of the first tape 31, to form the "Y" configuration described above of the portion of the second absorbent material around the portion of the first absorbent material. The portion of the second absorbent material is folded around the first edge absorbent which is perpendicular (transverse) to the longitudinal direction 70 of the absorbent compound 100 / absorbent of the buffer type, with overlapping of the absorbent materials, and a portion of the second absorbent extends without overlap moving away from the first absorbent portion 31. This is done along the transverse direction of the joined absorbent compound. Desirably the fold is to allow the formation of a space / cavity between the first and the second absorbent portion at the edge of the end of the first absorbent portion closest to the removal tip 15. The folded and folded tapes 33 are passed through the set of rollers splices 40, 43, one on each side of the absorbent compound 100, to desirably press together the two tapes 31 and 32 in the splicing region 42 to form the spliced absorbent compound. One of the joining rollers 40 includes an embossed joining surface 14 on which an embossed joining pattern is configured, such as the flower pattern illustrated in the figure. As the roll rotates and compresses the folded tapes between an empty roll anvil 43 positioned opposite the absorbent compound of the joining roll 40, the tapes are compressed and joined desirably without the use of a separate heat source or adhesive. In an alternative embodiment, a separate heat source / and / or adhesive are also provided to help join the tapes in the joining region 42. In another embodiment, fibers with varying melting points, such as bi-fiber bonding component can be used in one or both layers to aid in the bonding process. While bonding tapes without heat and other bonding mechanisms is preferred in one embodiment, other embodiments may use fiber interlacing techniques, such as needle punching, thermal bonding techniques, ultrasonic and adhesive techniques of union. In all of these embodiments, a strip for removal can be attached to the absorbent compound, joined or wrapped around it.
    Ideally, as shown in Figure 9, which illustrates a flowchart of the manufacturing steps, to manufacture a form of making a tampon (or tampon-type absorbent) from the two-banded absorbent compound described above, a covering material 16 and the portions of absorbent material 12, 14 the tapes are, in a manufacturing step 91, passed through a turn of a strip for removal 34, after having been passed through the folding station described above. The cover strip 16 is adhered to the tapes through sealing lines 140. When the product is folded and joined as described in connection with Figure 8, the joined absorbent compound is tied, in a manufacturing step 92, the strip to removal 34 positioned in a parallel direction 145 to the longitudinal direction 70 for the production of a softwind 147. When the softwind 147 (or tampon pad) has been rolled into an expanded cylinder in a manufacturing step 93, the softwind 147 and the cover then they go through a traditional tampon compression process (jaws of a tampon press) to compress the softwind 147 into a finished processed tampon 148.
    In one embodiment, to prepare a buffer of the present invention, the following method can be used. In general, first the first portion of absorbent material (tape) 12 is provided. The second portion of tape of absorbent material 14 is placed on the first absorbent material and folded around a transverse end of the first absorbent portion, to form a compound absorbent and the compound is joined in a region where the two portions overlap, along the transverse direction of the compound. Then, the absorbent compound can optionally receive a cover 16 described above. When the absorbent compound is folded and joined, it takes on a generally cylindrical shape, with a method known to those skilled in the art, such as radial winding of the joined absorbent compound. To radially roll the bonded absorbent compound, a shaft is placed on both sides of the bonded absorbent compound. The shaft is rotated in one direction to form a roll. When the bonded absorbent compound reaches a generally cylindrical shape, the bonded absorbent compound is compressed to increase the density of the bonded absorbent compound, thus forming the plug or buffer-type absorbent, generally having a uniform diameter, with the exception of the insertion tip.
    A specific method of producing a tampon of the invention may also include the steps of first supplying a tape of a first absorbent material and a second absorbent material, all having a longitudinal direction and a transverse direction, positioning the tape of the second absorbent material of so that their ends are juxtaposed on the end of the tape of the first absorbent material in the perpendicular (transverse) direction to the longitudinal direction of all the tapes, thus forming an overlap of the two tapes, fold the tape of the second absorbent material around the end of the tape of the first absorbent material, through a folding plate, joining the tape of the first absorbent material with the tape of the second absorbent material in the overlap thus forming a joining region, rotating the tapes of the material of the absorbent compound joined on an axis located in parallel with the longitudinal direction of the tapes joined to form a roll or cylinder of the tampon, usually called a tampon pad, insert the tampon pad into a tampon compression section of a press commonly used for tampon manufacturing, and finally compress the tampon compress radially mainly in the press jaws to form a plug. These tampon-forming compression devices are available from companies such as Switzerland's Ruggli Ltd. and are offered commercially under the name CL-3.
    Buffer-type absorbent compounds joined to the base of two tapes as described above, can be used to form digital cylindrical and applicator-type pads for buffers. However, it should also be recognized that additional embodiments of the invention include uncoiled cylindrical pads with three absorbent regions along the longitudinal direction of the tampon. Such alternative absorbent cylindrical pads include absorbent structures folded in "W", folded in "V", with a bifurcated shape and similar to cups, as described in U.S. 6,837,882 to Agyapong et al. ; U.S.20080132868 for Jorgensen et al. ; U.S. 6,740,070 to Agyapong et al .; U.S. 7,677,189 to Kondo et al .; and U.S. 2010/0114054 to Mueller et al., all of which are incorporated herein by reference in their entirety.
    For example, it is contemplated that for configurations of cylindrical wads in the form of "W" or bifurcated, the first material of the absorbent portion can be comprised of the material in "W" or bifurcated, and a second material of the absorbent portion can be attached to the withdrawal end of the cylindrical “W” or bifurcated type before the bending and / or compression steps. This second material of the absorbent portion can be attached before or after attaching a strip for removal, using methods known as stitch / stitch joining, needle punching, hydroentangling, adhesive, thermal or pressure. As with many of the previous forms of execution, it is contemplated that in a form of execution of the cylindrical pad in "W" or bifurcated type, for the material of the second absorbent portion to be wrapped around the lower end (withdrawal end) of the material of the first absorbent portion (formed in "W" or bifurcated) in such a way that there is partial overlap of the materials of the first and second absorbent portion, with three distinct absorbent regions being formed, being a first absorbent region of the material in "W" or bifurcated, a middle region of the overlap of the "W" or bifurcated material and the second absorbent material, and a third region (in the longitudinal direction), of the second absorbent material.
    It is similarly contemplated that this structure of three absorbent regions can be manufactured using a cylindrical pad of the cup-like plug. In this structure, which typically involves the overlapping of perpendicular absorbent layers, it is contemplated that the lower layer under any overlapping layers may include the material of the second absorbent portion so that the base of the bowl would be composed of the material of the second absorbent portion when of manufacture, which is joined (using any of the methods described above) in the overlapping regions on the sides of the finished bowl configuration. The upper overlapping layers would cover the material of the first absorbent portion. The material of the second absorbent portion would extend further down in the final cup configuration than traditional overlay layers. In a second embodiment, an orifice can be cut through the upper overlapping layers to allow the fluid / liquid to pass through the bowl to the material layer of the second absorbent portion below. Materials
    The entire first and second absorbent material portions 12 and 14 of the absorbent compound ideally contain absorbent materials, particularly fibrous absorbent materials. Examples of such absorbent materials include materials such as cellulosic fibers such as wood pulp, cotton, rayon, viscose, LYOCELL® which are from the Lenzing Company in Austria or mixtures of these or other cellulosic fibers. Natural fibers can include a variety of fibers, such as wool, cotton, linen, hemp and wood pulp. Wood pulps include standard softwood coverage grade such as CR-1654 (US Alliance Pulp Mills, Coosa, Alabama). The pulp can be modified to improve the inherent characteristics of the fibers and their processing capacity. Wrinkling can be transmitted to fibers, for example, by conventional means. Ripple can be transmitted to the fibers, for example, by methods including chemical treatment or mechanical torsion. Ripple is typically transmitted before cross-linking or hardening. Pulps can be hardened by the use of cross-linking agents such as formaldehyde or its derivatives, glutaraldehyde, epichlorohydrin, methylated compounds such as urea or urea derivatives, dialdehydes such as maleic anhydride, unmethylated urea derivatives, citric acid or other polycarboxylic acids. Pulp can also be hardened by the use of heat or caustic treatments such as mercerization. Examples of these types of fibers include NHB416 which is a chemically crosslinked southern softwood pulp fiber that enhances the wet modulus, available from Weyerhaeuser Corporation of Tacoma, WA. Other useful pulps are split pulp (NF405) and non-split pulp (NB416) also from Weyerhaeuser. HPZ3 from Buckeye Technologies, Inc. of Memphis, TN has a chemical treatment that initiates a ripple and twist, in addition to imparting additional dry and wet stiffness and fiber resilience. Another suitable pulp is the Buckeye HP2 pulp and yet another pulp is IP Superoft from International Paper Corporation.
    For cellulosic fiber (for example, viscose, rayon, etc.), fibers in an embodiment can have a basic length between approximately 5mm to approximately 50mm. The fibers in one embodiment can have a denier of approximately 2 to approximately 6. Denier is a unit of measurement of fineness of yarn based on a standard of 50 milligrams (mg) for 450 meters of yarn. The fibers may have a circular, bilobar, trilobar cross-sectional configuration, or some other cross-sectional configuration known to those skilled in the art. The bilobar configuration has a cross section profile that looks like a dog bone while the trilobar configuration has a cross section profile that looks like a "Y". These fibers are available from Kelheim Fibers, Germany, under the designation Galaxy. The fibers can also be bleached, if desired.
    When cotton fibers are used, cotton fibers in an embodiment can have a basic length of approximately 5 mm (mm) to approximately 30 mm. Cotton fibers can generally have a fiber size of approximately 150 microns to approximately 280 microns. Cotton fibers can also be bleached, if desired. Bleaching will make cotton fibers look whiter.
    In addition to the above absorbent fibers, all layers of the absorbent compound may optionally contain other fibers, which are known in the art as binder fibers. Typically, binder fibers have a fiber component that will melt or fuse with other fibers in each absorbent layer. Binder fibers can be natural fibers or synthetic fibers. Synthetic fibers include those made of polyolefins, polyamides, polyesters, rayons, acrylics, viscose, superabsorbents, LYOCELL® regenerated cellulose and any other suitable synthetic fibers known to those skilled in the art. Many polyolefins are available for fiber production, for example, polyethylene such as ASPUN® 681 from Dow Chemical 1 A linear low density polyethylene, 2553 LLDPE and 25355 and 12350 high density polyethylene are such suitable polymers. Polyethylenes have molten material rates, respectively, of approximately 26, 40, 25 and 12. Polypropylenes for fiber formation include polypropylene PD 3445 ESCORENE® from Exxon Chemical Company and PF304 from Montell Chemical Co. Another fiber could be a polyester sheath with two components and a polyethylene core known as T255 made by Trevira from Germany. Other two-component fibers that can be fused are available from Unitika Japan, for example, Unitika MELTY 4080 and 6080 fibers, having polyester sheaths or cores and polyethylene sheaths or cores. Alternative binder fibers are available from Fibervisions under the designation of the ETC Bounce fiber line, as PET / PE fibers of approximately 2.2 dtex and basic fiber length of 40 mm. Other polyolefins are also available. Suitable rayon fibers are 1.5 denier Merge fibers 18453 from Cellulose Fibers Incorporated of Axis, Alabama. The fibers can be treated by conventional compositions and / or processes to enable or increase permeability.
    Various methods known to those skilled in the art can be used to prepare all layers of the absorbent compound. Methods known as air-layering, carding, moisture-layering, hydroentangling and other known methods can be used to form the individual absorbent layers of the absorbent compound. In an embodiment of the present invention, at least one of the layers is prepared using an air layer forming process, where the air-laid fibers contain a first fiber and a second fiber, where the first fiber is a binder fiber and the second fiber is an absorbent fiber.
    In the present invention, the first portion of absorbent material 12 can be prepared from any of the absorbent materials described above. The first absorbent portion can be prepared using a carding process, an air layer forming process or any other process known to those skilled in the art. The first absorbent portion may or may not contain binding fibers. In an embodiment of the present invention, the first absorbent portion is prepared from a conventional tape of an absorbent material that is currently used in tampon productions. As an example, the first layer can be prepared from a carded web of cotton, rayon or a mixture of them seated in the air, with or without the presence of binder fibers. In an alternative embodiment of the present invention, the first absorbent portion may include 100% regenerated cellulosic fiber, natural fibers or synthetic fibers such as viscose, rayon cotton or thermoplastic fibers, or mixtures thereof. Ideally, the first absorbent is made from 100% trilobar ray fibers, for example, Galaxy VY fibers made by Kelheim Fibers. In one embodiment, the base weight of that first absorbent portion can be approximately 100 to 250 gsm, with the density of that portion ideally between approximately 0.04 to 0.08 g / cc and demonstrating an ideal Syngina absorbance of approximately 4.3 at 5.5 g / g.
    In an embodiment of the present invention, the second portion of absorbent material can be prepared from a mixture of one or more of the absorbent fibers described above and a binder fiber. An example of material that can be used in the second half of the present invention is described in patent application PCT / EP2004 / 006441 entitled: "Airlaid Process With Improved Throughput", filed on 16 June 2003, published on December 29, 2004 as WO2004 / 113608, which is owned by the same assignee of this request and which is incorporated into this document by reference in its entirety.
    In another embodiment, the second portion of absorbent material 14 can be made of 100% regenerated cellulosic fiber, natural fibers or synthetic fibers, for example, viscose, rayon, cotton or thermoplastic fibers or mixtures thereof. Ideally in one embodiment, the second portion of absorbent material should be made from a mixture of regenerated cellulose, for example, blue Galaxy VY fibers and thermoplastic binder fibers, such as Unitika 6080 PET / PE 2.2 dtex fibers. approximately 40 mm in length. Ideally, the basic weight of the second portion of absorbent material 14 is between approximately 15-300 gsm, more ideally between approximately 40 to 100 gsm. Ideally, the density of this second absorbent portion should be between approximately 0.03 to 0.3 g / cc, more ideally between approximately 0.06 to 0.12 g / cc. In one embodiment, the second absorbent portion demonstrates a Syngina absorbance of approximately 3.5 to 5.0 g / g. Ideally, the fibers are mixed in a proportion of about 50 percent regenerated cellulose / 50 percent binder fiber to about 90 percent regenerated cellulose / 10 percent binder fiber, more ideally in a proportion of 80 percent regenerated cellulose to 20 percent binder fiber. In a desired embodiment, the first portion of absorbent material 12 and the second portion of absorbent material 14 are hydrophilic fibers with viscose being permanently hydrophilic and binder fibers being treated with a hydrophilic finish. These materials may be available from Sandler AG in Germany.
    As noted, in addition to the two portions of absorbent material 12 and 14, the absorbent compound can also be provided with a covering material 16. The covering prevents the fibers of the tampon absorbing compound from coming into direct contact with the inner walls of the vagina. a woman. This feature can help prevent fibers from being left in the vagina after the plug 10 is removed. This feature can also impact the perception of a tampon at the time of insertion. The cover material 16 can also be wound on the end of the plug removal to cover and wrap the fibers. The cover can also be made of a heat-sealable material to assist in bonding it to the fibers, by heat and / or pressure. The cover can be made of non-woven material, such as polyolefin, particularly polypropylene or polyethylene. A suitable material is a material made of heat-sealed continuous filaments. Suitable methods and materials for the production of plugs with cover materials are well known to those skilled in the art and, therefore, will not be described.
    The cover material 16 can be formed as a rectangular surface and can have the length and width that are dimensioned so that the cover 16 can completely wrap around the outer periphery of the bonded absorbent compound 12 and 14, when the bonded absorbent compound is rolled. Preferably, the cover will be of a length that is equal to or greater than the circumference of the rolled-up absorbent compound prior to compression and will have a width that is approximately equal to or greater than the outer periphery of the rolled-up absorbent compound. Thus, when dimensioning the width of the cover 16, the cover 16 will be able to wrap completely around the outer surface of the attached absorbent compound and be superimposed on itself. The liquid-permeable cover 16 can be joined along the entire length of the overlapping region using an impulse sealer or other type of sealing mechanism. Alternatively, the cover 16 can be joined in place at spaced points or lines along the overlapping region, if desired. The cover 16 can be bonded to itself and / or to the portions of material of the bonded absorbent compound 12 and 14 using heat, pressure, heat and pressure, ultrasound, adhesives, glue or any other known joining technique.
    The liquid-permeable cover 16 can be formed of woven or non-woven material having a porous substrate. Woven material includes textiles that can be made of rayon, cotton, polyolefins or other synthetic yarns. Synthetics can be fiber filaments or continuous. The cover 16 can be in a form of embodiment made of 12-33 gsm polypropylene fabric. Non-woven materials can also include joined carded webs and hydraulically interwoven webs. United braided or carded webs are commercially sold by Kimberly-Clark Corporation, with a headquarters located at 401 North Lake Street, Neenah, Wis. 54956. Another non-woven material that can be used as the cover 16 is formed from 100% polyester fibers joined by a binder. This material is known as a powder-bonded carded web (PBCW). PBCW is commercially available from HDK Industries, Inc. which is headquartered at 304 Arcadia Drive, Greenville, S.C. 29609. Cover 16 can also be formed from a slotted thermoplastic film that is two-dimensional or three-dimensional in thickness. Slotted thermoplastic films are available from several commercial suppliers including Pantex Sri, Pantex Sud srl, Via Terracini snc which is based in 51031 Agliana, Pistoia, Italy and Applied Extrusion Technology which has a PO Box 582, Middleton, Del. 19709 .
    The liquid-permeable covering 16 can be treated with an aqueous solution to reduce frictional drag, to increase the permeability of the tampon and to increase the ease of insertion and removal of a woman's vagina. The cover 16 can be treated before being rolled up with the bonded absorbent compound portions 12 and 14 or after the cover 16 has been positioned around the outer surface of the bonded absorbent compound. The different types of aqueous solutions that can be used are known to those skilled in the art. A particular type of aqueous solution is taught in U.S. Patent 5,533,990 to Yeo, entitled “TAMPON EXHIBITING LOW FRICTIONAL DRAG”. This patent was transferred to Kimberly-Clark Worldwide, Inc., being incorporated by reference and made part of it.
    Tampon 10 may also include a removal strip 34 to assist in removing tampon 10 from the woman's vagina. In one embodiment, the strip for removal 34 is tied around the portions of bonded absorbent composite material 12 and 14. Alternatively, the strip for removal can be attached to the bonded absorbent compound or portions of material thereof 12 and 14. One method of fixing the strip for removal 34 is to form an opening or hole through the tapes of the absorbent compound. The removal strip 34 is then screwed through the opening and wound around itself to securely tie it to the material portions of the absorbent compound 12 and 14. The free ends of the removal strip 34 are then tied in a knot to ensure that the same 34 does not separate from the material portions of the absorbent compound 12 and 14. The knot also serves to prevent the strip for removal 34 from fraying and to provide a place or point where the woman can hold it 34 when she is ready to remove it the plug 10 of your vagina. It should be noted that the strip for removal 34 can be attached to and / or fixed in various areas of the buffer 10 and can pass through at least one of the portions of absorbent material 12, 14. The strip for removal 34 can also be fixed before that the mass of the absorbent compound 12 and 14 (buffer-type absorbent) is compressed or after being formed in the buffer.
    The removal strip 34 can be made of various types of yarn or tape. A yarn or ribbon can be made of 100% cotton fibers and / or other materials in whole or in part. The strip can be attached to the tampon, with or without lashing before or when the tampon is being transformed into the generally cylindrical shape. In this way, there is no need (or little need) to tie the strip to the tampon and a better guarantee that it will stay in place and attached to the tampon before, during use and during the removal of the tampon until it is ready for disposal. Advantageously and as with the material portions of the absorbent compound 12, 14, the strip 34 can include binding material that can be joined together, for example, the same type of material compositions for the materials of the absorbent compound portions 12, 14 or those with similar binding characteristics. As such, the strip can be a plurality of strand fibers, including at least one first type of strip fiber, being able to be joined to adjacent fibers and where the strand is spontaneously joined to the material mass of the absorbent portion.
    The strip for removal 34 should have a length that extends beyond the end of the plug 10 between approximately 51mm to 203mm, preferably approximately 102mm to 152mm, and more preferably, approximately 127mm. The removal strip 34 can be dyed and / or treated with an anti-absorption agent, such as wax, before being attached to the attached absorbent compound. The anti-absorption agent will facilitate and prevent body fluids from being absorbed along the strip for removal 34 and coming into contact with the inner surface of a woman's underwear. A dry and clean removal cord 34 is preferred by the user, especially when she is going to remove the plug 10 from her vagina. Depending on the desired absorbency in the finished buffer, the basic weight of the first and second absorbent portions can vary. For example, in one embodiment, the first and second portions of absorbent material (12, 14) are designed to have a total basic weight of about 100 and 350 gsm. Typically, the forming process is controlled to produce a first and second absorbent surface with a width between approximately 40mm to approximately 60mm, preferably about 50mm.
    The base weight and / or the length of the plug 10 can also be adjusted to form plugs of different sizes. Typically, the total length of the first and second portions of absorbent material together can vary from approximately 25 to approximately 60 mm, depending on the required absorbency and base weight. The tampon type 90 of the present invention can be used to form a digital tampon or a tampon in a tampon with applicator, having a separate applicator that is used to insert tampon 10 into a woman's vagina and are generally as known in the matter. Example:
    A softwind was prepared using the method described above and the materials below. The tape material of the first absorbent portion was made from 100% trilobar fiber rayon (Galaxy as noted earlier) and including a wave / honeycomb compression pattern as illustrated previously in Figure 5 as 28. The base weight of the tape material of the first absorbent portion was 165 gsm. The tape material of the second absorbent portion was made of trilobar blue rayon (70-80%) and a basic bicomponent binder fiber (nucleus / sheath) of PET / PE composition (20-30%) and including a joint type pattern spaced diamonds, as was also previously described and illustrated in Figure 5 at 29. The base weight was 60 gsm. A pattern of joining staggered dots, as described earlier, was used to join the tape of the material of the first absorbent portion to the material of the tape of the second absorbent portion. A traditional removal strip (PET / viscose yarn) was used in the manufacture and wrapped around the absorbent tapes. A 12 gsm PET / PE basic fiber TBCQ covering surface was included in the buffer. A 70 micron thick cross section of the produced softwing was then prepared for visualization using the following procedure.
    A sample of each type (a softwind and a plug in a complete / finalized process made of compressed softwind) was vacuum infiltrated with Epo-fix insertion epoxy following standard infiltration procedures and mixing epoxy according to the manufacturer's guidelines. The epoxy was allowed to cure overnight at room temperature. The inserted samples were sectioned by a slide microtome (a Reicher-Jung Polycut E was used, but another slide microtome design will suffice) in a thickness of 70 and 40 micrometers. Sections were mounted on Epo-fix resin with coverslips. The sections were then photographed using black field lighting transmitted by macrophotography and bright field lighting transmitted with a variety of microscopes. However, for samples of 70 microns, a Nikon Coolpix 8700 with 8.9-71.2mm lenses was used. Image capture procedures were specific to the method and microscope, but the standard for that method and microscope. The documentation included capturing images of a ruler at the same magnification. A scale bar has been transferred for each image so that the magnification of the image can be calculated from the scale bar regardless of which additional scale is given to the image.
    After the preparation of the cross-section samples and the photograph was taken (70 micron samples), as shown in Figures 10 and 11, an analysis of the images was conducted. As can be seen in the photomicrograph shown in Figure 10, which depicts an image of cross sections of an uncompressed softwind, also shown statistically in Figure 9, at 147, the softwind includes a first portion of absorbent material 200 in the first absorbent regions 201 , as well as a second portion of absorbent material 255 in the second absorbent regions 202. The second portion of absorbent material is folded around the ends of the first portion of absorbent material to thereby create a cavity 220 of varying widths, with one in particular being approximately 3 mm. A cover 235 is shown along the side edge of the softwind. The strip for removal is also visible 210. Spaces 240 can be seen between folds / lobes of the second adjacent absorbent portion, as well as adjacent joining elements in the joining region. There is a theory that these spaces provide more absorbency in the surface area, as well as the cavities, by expanding the compressed tampon type in use. The connecting elements 245 in the connecting region 203 can be seen as relatively flat areas. In addition, parts of the diamond-like union pattern 215 can be seen in the second portion of the absorbent material. The approximate width of the softwind in the transverse direction is 27 mm. The first region of absorbent material is generally shown as 201 and extends out of the image in the longitudinal direction 70, overlapping the second region of absorbent material 202 in the junction region 203, which includes the junction points 245. An imaginary line 204 indicates the proximity of the joining elements in the joining region.
    A softwind as described above was then compressed radially using a buffer compression system and cross-sectional images were prepared, again from samples of 70 microns in thickness, one of which is seen in Figure 11. As can be seen in Figure 11, the compressed plug now has a width dimension in the transverse direction of approximately 12.4mm. The removal strip 210 can be seen in two places. The first portion of absorbent material 200 and the second portion of absorbent material 230 have been compressed so that the spaces between them and between the folds have been noticeably eliminated or reduced. The folds in compressed layers 240 will be expanded again upon use, in theory to produce spaces that were present in the uncompressed softwind.
    Without being bound by theory, there is a theory that the manufacture of a tampon-type pad as described, offers several comfort attributes to a potential user. The female vaginal canal is known to include a fold or curve above the pelvic base muscles, rather than being formed in a straight line. As a result, a tampon-type pad that demonstrates the ability to fold along the longitudinal direction offers greater comfort during use and folds to adapt to the topographic fold in the vaginal canal. This ability to bend results from the inclusion of three separate regions of stiffness / absorbency along the longitudinal direction of the tampon, allowing the tampon to bend / flex in or near the more rigid central overlap region (in the longitudinal direction), the joining region between the first absorbent portion and the second absorbent portion. In addition, the reduced “expansion capacity” of the second absorbent portion offers comfort during the removal of the tampon, but it probably opens a little when inserted.
    All publications, patents and patent documents mentioned in the specification are incorporated by reference in this document, although incorporated individually by reference. In the event of any inconsistencies, the present disclosure, including any definitions in this document, will prevail. Although the invention has been described in detail with respect to its specific aspects, it will be appreciated that those skilled in the art, upon obtaining the understanding of the aforementioned, can readily conceive changes, variations and equivalents to these aspects that are in the spirit and scope of the present invention, which must be evaluated in a manner corresponding to that of the appended claims.
    权利要求:
    Claims (13)
    [0001]
    1. Tampon-type absorbent (90) for insertion into the vaginal cavity, said tampon-type absorbent (90) having a longitudinal direction (70) including an insertion end (11) and a withdrawal end (15), said type absorber buffer (90) comprising a first absorbent region (12) at said insertion end (11) for capturing body fluid and demonstrating a first expansion capacity, a second absorbent region (14) at said withdrawal end (15) for storing fluid body and demonstrating a second expansion capacity, characterized by the fact that it additionally comprises a third absorbent region (13) located between said first absorbent region (12) and said second absorbent region (14), wherein said first absorbent region (12) is joined to said second absorbent region (14) in said third absorbent region (13); wherein said first absorbent region (12) is comprised exclusively of a first absorbent material, said second absorbent region (14) is comprised exclusively of a second absorbent material and said third absorbent region (13) is comprised of both said first and second absorbent materials; wherein said second absorbent region (14) is partially wound around the first absorbent region (12) in a transverse direction (80) to the longitudinal direction (70) in a joining region, where said first region of absorbent material (12) is joined to said second absorbent region (14) in said joining region to form said third absorbent region (13).
    [0002]
    2. Buffer-type absorber (90) according to claim 1, characterized by the fact that the third absorbent region demonstrates a third expansion capacity that is different from the first and second expansion capacities.
    [0003]
    3. Buffer-type absorber (90) according to claim 1 or 3, characterized by the fact that the first expansion capacity is greater than the second expansion capacity.
    [0004]
    4. Buffer-type absorber (90) according to any one of claims 1 to 3, characterized in that the absorbent region includes an expansion end and a withdrawal end, and a hollow cavity (21) is adjacent to the first region absorbent at its withdrawal end, said hollow cavity (21) defined by the second absorbent region.
    [0005]
    5. Buffer-type absorbent (90) according to claim 4, characterized in that the second absorbent region is a continuous surface that partially coils around the first absorbent region on the outer surface of the first absorbent region; or the second absorbent region is comprised of discontinuous surfaces which are at the withdrawal end of the first absorbent region.
    [0006]
    6. Tampon-type absorbent (90) according to claim 4, characterized in that the third absorbent region includes an exposed end of the second absorbent region which is linear, zigzag, wave or curvilinear design.
    [0007]
    7. Buffer-type absorber (90) according to any one of the preceding claims, characterized in that it also comprises a covering material (16).
    [0008]
    A tampon-type absorber (90) according to any one of the preceding claims, characterized in that it additionally comprises a withdrawal cord (34) fixed and extending from the withdrawal end (15) of said buffer-type absorber (90); and preferably further comprising a covering material (16).
    [0009]
    9. Method for making a tampon (90) as defined in claim 1, characterized in that it comprises the following steps: a) providing a tape of a first absorbent material and a second absorbent material, each tape having a longitudinal direction , b) positioning said tape of the second absorbent material so that one of its ends is juxtaposed on the end of said tape of the first absorbent material, thus forming an overlap of the two tapes in the transverse direction to the longitudinal direction of the tapes; c) folding the tape of the second absorbent material around said end of the tape of the first absorbent material, through a fold plate; and d) joining said tape of the first absorbent material to said tape of the second absorbent material in said overlap thus forming a joining region; wherein the bonding step is preferably carried out by pressure bonding rollers.
    [0010]
    Method according to claim 9, characterized in that said first absorbent material has an insertion end (11) and a withdrawal end (15) and in the folding step, a cavity (21) is formed adjacent to the first absorbent material defined by the second absorbent material.
    [0011]
    Method according to claim 9 or 10, characterized in that it additionally comprises the steps: rotating said strips of absorbent material joined in step d) about an axis that is located parallel to the longitudinal direction of said strands joined to form a tampon pad, insert the tampon pad into a tampon compression section of a press to make a tampon (10), and compress the tampon pad radially to form a tampon (10).
    [0012]
    Method according to claim 11, characterized in that it also includes the step of wrapping the plug (10) with a cover (16); and / or it also includes the step of fixing the tapes of absorbent material on a withdrawal cord (34).
    [0013]
    Method according to claim 11, characterized in that said first absorbent material includes an insertion end (11) and a withdrawal end (15) in the longitudinal direction (70) and, in said folding step, a cavity (21) is formed adjacent to said withdrawal end (15) of the first absorbent material, said cavity (21) defined by the second absorbent material.
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    同族专利:
    公开号 | 公开日
    KR101911113B1|2019-01-04|
    RU2605506C2|2016-12-20|
    CN103501743A|2014-01-08|
    AU2012251370A1|2013-10-17|
    EP2704678A2|2014-03-12|
    WO2012150546A2|2012-11-08|
    WO2012150546A3|2013-01-17|
    BR112013028480A2|2017-07-04|
    EP2704678A4|2014-10-08|
    CN103501743B|2015-09-02|
    KR20140016352A|2014-02-07|
    MX347906B|2017-05-16|
    US20120283684A1|2012-11-08|
    MX2013012339A|2013-11-01|
    AU2012251370B2|2017-02-02|
    EP2704678B1|2019-09-11|
    US9610201B2|2017-04-04|
    RU2013152441A|2015-06-10|
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    法律状态:
    2017-07-11| B15I| Others concerning applications: loss of priority|Free format text: PERDA DAS PRIORIDADES US61/482,883 E US13/460,157, REIVINDICADAS NO PCT/IB2012/052174, CONFORME AS DISPOSICOES PREVISTAS NA LEI 9279, DE 14/05/1996 (LPI), ART. 16,7O, ITEM 28, DO ATO NORMATIVO 128/97, E NO ART. 29 DA RESOLUCAO INPI-PR 77/2013. ESTA PERDA SE DEU PELO FATO DE O DEPOSITANTE CONSTANTE DA PETICAO DE REQUERIMENTO DO REFERIDO PEDIDO PCT SER DISTINTO DAQUELE QUE DEPOSITOU AS PRIORIDADES REIVINDICADAS E NAO TEREM SIDO APRESENTADOS DOCUMENTOS COMPROBATORIOS DE CESSAO, CONFORME AS DISPOSICOES PREVISTAS NA LEI 9279 DE 14/05/1996 (LPI), ART. 16,6O, ITEM 27, DO ATO NORMATIVO 128/97, E NO ART. 2 DA RESOLUCAO INPI-PR 179/2017. |
    2017-09-19| B12F| Appeal: other appeals [chapter 12.6 patent gazette]|
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-01| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-09-01| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-12-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-09| 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 01/05/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161482883P| true| 2011-05-05|2011-05-05|
    US61/482,883|2011-05-05|
    US13/460,157|US9610201B2|2011-05-05|2012-04-30|Tampon having multiple absorbent regions|
    US13/460,157|2012-04-30|
    PCT/IB2012/052174|WO2012150546A2|2011-05-05|2012-05-01|Tampon absorbent|
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