Absorbent article

Abstract

The utility model relates to personal hygiene nursing product technical field, concretely relates to an absorbent article. Including absorbent cutting piece, the absorbent cutting piece has the topsheet layer of facing human body and the bottom sheet layer of facing clothes and opposite arrangement with the topsheet layer, three -dimensional guard, one end of three -dimensional guard is jointed to the topsheet layer, and opposite another end is free relative to absorbent cutting piece, three -dimensional guard includes hydrophobic material layer and softening material layer, and the softness of softening material layer is greater than the softness of hydrophobic material layer, wherein softening material layer at least in three -dimensional guard's free end is folded around the opposite two sides of hydrophobic material layer and is jointed to the opposite two sides of hydrophobic material layer, to set up the first cavity and the second cavity in the opposite two sides of hydrophobic material layer, wherein the first cavity and / or the second cavity are arranged with elastic material. The part of three -dimensional guard in the utility model model and the wearer contact is relatively soft, thereby alleviating the friction of absorbent article to the wearer thigh root place, and the wearing comfort is improved.

Description

Technical Field

[0001] This utility model relates to the field of personal hygiene care products technology, specifically to an absorbent product. Background Technology

[0002] Among the top three consumer complaints regarding disposable diapers, red marks and welts on the legs are particularly prominent. This problem stems primarily from two key factors in the current design:

[0003] Firstly, regarding material selection, to ensure waterproofing in the crotch area, current designs generally use hydrostatically resistant SMS (spunbond-meltblown-spunbond) composite materials as the three-dimensional protective layer. While this material has good waterproof properties, its surface feel is significantly inferior to ordinary spunbond materials and hot-air nonwoven fabrics. When a baby's legs move frequently, the relatively rough SMS material continuously rubs against the delicate skin, which is one of the main reasons for redness around the legs.

[0004] Secondly, in terms of structural design, to enhance leak-proof functionality, existing products typically incorporate 1-4 high-tensile elastic bands (470-800 dtex) in the three-dimensional protective area. While these high-tensile elastic bands effectively prevent side leakage, excessive pressure can leave noticeable marks on the baby's legs. Especially when worn for extended periods or when the baby is very active, the combined effect of mechanical pressure and material friction significantly increases the risk of red marks on the skin.

[0005] Based on the above analysis, it is necessary to propose a new type of absorbent material that can maintain the necessary leak-proof performance while reducing pressure and friction on the baby's legs, thereby effectively preventing and reducing the occurrence of red marks or chafing. Utility Model Content

[0006] Therefore, the purpose of this invention is to provide an absorbent product that can reduce friction on the wearer's legs.

[0007] This utility model provides an absorbent article, including an absorbent sheet having a top layer facing the human body and a bottom layer opposite to the top layer and facing the clothing; a three-dimensional guard, one end of which is fixedly joined to the absorbent sheet and the other end of which is free relative to the absorbent sheet; the three-dimensional guard includes an inner hydrophobic material layer and an outer softening material layer, the softening material layer being soft...

[0008] The softening material layer has a softness greater than that of the hydrophobic material layer, wherein the softening material layer is folded around the hydrophobic material layer at least at the free end of the three-dimensional enclosure and is respectively joined to the opposite sides of the hydrophobic material layer at the fixed end of the three-dimensional enclosure, thereby enclosing a first cavity and a second cavity located on the opposite sides of the hydrophobic material layer, wherein an elastic material is arranged in the first cavity and / or the second cavity.

[0009] The three-dimensional protective enclosure in this invention is formed by surrounding the outside of a hydrophobic material layer.

[0010] The relatively high layer of softening material, along with the elastic material inside the cavities on both sides of the hydrophobic material layer, allows the three-dimensional protective barrier to conform to the human body. Furthermore, the part of the three-dimensional protective barrier that comes into contact with the wearer is relatively soft, thereby reducing friction between the absorbent material and the wearer's groin area and improving wearing comfort.

[0011] In one embodiment, the softening material layer and the hydrophobic material layer are selected from at least one of the group consisting of nonwoven materials, membrane materials, and composite materials of nonwoven materials and membrane materials.

[0012] In one embodiment, the softening material layer is at least one of three-layer spunbond nonwoven fabric or hot-air nonwoven fabric.

[0013] In one embodiment, the hydrophobic material layer is a waterproof membrane or a hydrostatically resistant spunbond meltblown composite nonwoven material.

[0014] In one embodiment, the length of the softening material layer in the longitudinal direction of the absorbent article is not greater than the length of the hydrophobic material layer in the longitudinal direction of the absorbent article.

[0015] In one embodiment, the softening material layer is fixedly bonded to the hydrophobic material layer in a region outside the elastic material.

[0016] In one embodiment, the elastic material is located in the region of the first cavity and / or the second cavity near the bending area of ​​the softening material layer.

[0017] In one embodiment, the elastic material is one or more of the following: elastic strands, polymer films, elastic nonwoven fabrics, and elastic composite materials.

[0018] In one embodiment, the elastic material is an elastic strand with a fineness of 20 to 800 dtex, the number of elastic strands is 1 to 20, and the center distance between two adjacent elastic strands is no greater than 5 mm.

[0019] This utility model also provides an absorbent article, including an absorbent sheet having a top layer facing the human body and a bottom layer opposite to the top layer and facing the clothing; a three-dimensional guard, one end of which is fixedly joined to the absorbent sheet, and the other end of which is free relative to the absorbent sheet; the three-dimensional guard includes at least a folded hydrophobic material layer, wherein the hydrophobic material layer is bent at least at the free end of the three-dimensional guard to form a cavity containing an elastic material, and is bonded together at the fixed end of the three-dimensional guard to close the cavity; the elastic material is located in the cavity near the bending area of ​​the hydrophobic material layer; wherein the elastic material is no more than 10 elastic strands with a fineness of 20 to 800 dtex, and the center distance between two adjacent elastic strands is no more than 5 mm; wherein the material of the hydrophobic material layer is a hydrostatically resistant spunbond meltblown nonwoven material.

[0020] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0021] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram showing the unfolded absorbent article according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of an absorbent article according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 Enlarged view of point I in the middle;

[0025] Figure 4 This is a schematic cross-sectional view of an absorbent article according to another embodiment of the present invention;

[0026] Figure 5 yes Figure 4 Enlarged schematic diagram of section II.

[0027] Explanation of reference numerals in the attached figures

[0028] 1-Absorbent panel; 10-Absorbent product; 20-Front waist area; 201-Front edge; 202-Front side edge; 30-Crotch area; 301-Crotch side edge; 40-Back waist area; 401-Back end edge; 402-Back side edge; 11-Top panel layer; 12-Bottom panel layer; 13-Absorbent core; 2-3D protective barrier; 21-Softening material layer; 22-Hydrophobic material layer; 23-First cavity; 24-Second cavity; 25-Elastic material; 251-Elastic strand; 26-Bending area; 27-Cavity; 3-Side panel; 41-Adhesive; L-Length; W-Width. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments. The embodiments given are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0030] The schematic solutions of the technical solutions disclosed in this utility model are now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0031] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0032] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0033] As used herein, the term "absorbent article" refers to a product that can be placed against or near the wearer's body (i.e., adjacent to the body) to absorb and contain various liquid, solid, and semi-solid excretions from the body. As described herein, such absorbent articles are intended to be discarded after a limited period of use, rather than washed or otherwise restored for reuse.

[0034] As used herein, the term "joint" refers to the attachment, adhesion, or connection of two elements. Two elements are considered joined together when they are directly or indirectly attached, adhered, or connected to each other, such as when they are stacked and positioned relative to each other. Joining can be performed by means of, for example, adhesives, pressure bonding, thermal bonding, ultrasonic welding, splicing, or stitching.

[0035] As used herein, the term "ultrasonic welding" refers to a method, for example, by passing material through a slit between an ultrasonic generator and a support roller.

[0036] As used herein, the term "elastic material" refers to a long strip of material that is elastic, such as, but not limited to, elastic rubber bands, elastic bands, elastic fiber nonwoven sheets, etc. An elastic material can be stretched in at least one direction (e.g., longitudinally or transversely) by applying a tensile force, and can shrink / return to approximately its original size by releasing the tensile force.

[0037] As used herein, the term "membrane" refers to a thermoplastic film formed using processes such as casting or blown film extrusion. This term includes perforated membranes, slotted membranes, and other porous membranes constituting liquid transfer membranes, as well as membranes that cannot transfer liquids, including but not limited to barrier membranes, filled membranes, breathable membranes, and oriented membranes.

[0038] As used herein, the term "softening material layer" refers to a polymeric material that has been treated to increase its softness. This treatment may include any known mechanical or chemical process for increasing material softness. Such a softening material layer can generally be formed from any suitable nonwoven material. In at least some embodiments, the softening material layer may comprise a spunbond nonwoven material consisting of randomly arranged continuous filaments. In other embodiments, the softening material layer may also comprise a spunbond nonwoven material or a hot-air nonwoven (TABCW).

[0039] As used herein, the term "basic weight" refers to the mass of material per unit area, typically expressed in grams per square meter (g / m²). 2 The basis weight (or GSM) is used to measure the thickness, density, or coverage of a material. The test method for basis weight is specified in the national standard GB / T 24218.1-2009 Textiles - Test Methods for Nonwovens - Part 1: Determination of Mass per Unit Area.

[0040] As used herein, the term “thickness” refers to the vertical distance between two parallel reference plates of a nonwoven material under specified conditions, usually expressed in millimeters (mm) or micrometers (μm). The test method for thickness is specified in the national standard GB / T 24218.2-2009 Textiles, Nonwovens, Test Methods Part 2: Determination of Thickness.

[0041] Absorbent products

[0042] refer to Figure 1 For illustrative purposes, an absorbent article 10 that can be manufactured according to this disclosure is shown. The absorbent article 10 may be a shorts-type personal care product (or "diaper"). It should be understood that, without departing from the scope of this disclosure, the technical solutions of this disclosure are suitable for personal wear absorbent articles for care, including but not limited to diapers, training pants, and feminine hygiene products.

[0043] Figure 1 The absorbent article 10 is shown in a flat configuration and in its natural state, without elastic deformation or wrinkling under external force. The absorbent article 10 has mutually perpendicular longitudinal directions L and transverse directions W. For reference purposes, Figure 1 The diagram also shows the longitudinal central axis X and the transverse central axis Y of the absorbent article 10. Along the longitudinal direction L, the absorbent article 10 can be divided into a front waist area 20, a crotch area 30, and a back waist area 40, with the crotch area 30 connecting the front waist area 20 and the back waist area 40. In the wearing state, the front waist area 20 substantially covers the wearer's abdominal waist area, and the back waist area 40 substantially covers the wearer's back waist area. The front waist area 20 has front edges 202 on opposite sides in the transverse direction W, and a front end edge 201 extending between the two front edges 202. The back waist area 40 has rear edges 402 on opposite sides in the transverse direction W, and a rear end edge 401 extending between the two rear edges 402. The crotch area 30 has crotch side edges 301 on opposite sides in the transverse direction W. The front end edge 201 and the rear end edge 401 substantially define the two ends of the absorbent article 10 in the longitudinal direction L.

[0044] The single-piece personal care absorbent garment 10 needs to be bent in the crotch area 30 and the front waist area 20 and back waist area 40 joined together near the front edge 201 and the back edge 401 to form a shorts configuration. At this point, the front edge 201 and the back edge 401 together enclose a waist opening to accommodate the wearer's torso, while the two crotch side edges 301 of the crotch area 30 each enclose a leg opening to accommodate the wearer's thighs. For ease of joining the front waist area 20 and back waist area 40, side panels 3 can also be provided on opposite sides of the back waist area 40 in the lateral direction W, with each side panel 3 extending beyond the corresponding back edge 402. A connecting structure can be provided between the side panels 3 and the front waist area 20 to achieve a detachable connection. Reliable connecting structures include hook and loop fasteners or Velcro. A portion of the hook and loop fastener (e.g., numerous micro-hooks) can be arranged on the side panels 3, and another portion of the hook and loop fastener (e.g., numerous micro-loops) can be correspondingly arranged on the front waist area 20. Another detachable connection structure is, for example, tape coated on at least one of the side panel 3 and the front waist area 20.

[0045] Figure 1 The absorbent article 10 shown includes an absorbent panel 1, which is a single piece in the LW plane as the body of the absorbent article 10. A pair of crotch side edges 301 are formed by cutting across the entire sheet, thereby dividing the crotch area 30 into a front waist area 20 and a back waist area 40 on opposite sides, thus constructing the single-piece absorbent panel 1. Side panels 3 may be joined to the absorbent panel 1 at the back waist area 40. Viewed from a plane perpendicular to the LW (or in the thickness direction), the absorbent panel 1 may have a liquid-permeable top layer 11 facing the wearer and a liquid-impermeable bottom layer 12 facing the garment. An absorbent core 13 may be located between the top layer 11 and the bottom layer 12. Both the top layer 11 and the bottom layer 12 may extend beyond the outermost edge of the absorbent core 13 and may be wholly or partially peripherally bonded together using known bonding techniques to form a sealed peripheral area. For example, the top layer 11 and the bottom layer 12 may be bonded together by adhesive bonding, ultrasonic bonding, or any other suitable bonding method known in the art.

[0046] The topsheet layer 11 defines the wearer-facing surface of the absorbent sheet 1, which can directly contact the wearer's body and is liquid-permeable to receive bodily exudates. The topsheet layer 11 is intended to provide comfort and fit, and to guide bodily exudates away from the wearer's body and through its own structure toward the absorbent core 13. The topsheet layer 11 is intended to retain virtually no liquid in its structure, thus providing a relatively comfortable and non-irritating surface near the wearer's skin of the absorbent article 10. The absorbent sheet 1 includes a topsheet layer 11 adapted to face the body when worn, a bottomsheet layer 12 adapted to face away from the body when worn, and an absorbent core layer 13 sandwiched between the topsheet layer 11 and the bottomsheet layer 12. The topsheet layer 11 is hydrophilic and may be a single-layer or multi-layer laminate, attracting and allowing water molecules to pass through upon contact with liquid. The bottomsheet layer 12 is hydrophobic and may be a single-layer or multi-layer laminate, and does not allow liquid to pass through in a direction generally perpendicular to the single-layer or multi-layer laminate. Various woven and nonwoven fabrics can be used to make the top layer 11 and the bottom layer 12. Examples of nonwoven fabrics include spunbond fabrics, meltblown fabrics, co-woven fabrics, carded webs, bonded carded webs, bicomponent spunbond fabrics, spunlace fabrics, hot-air fabrics, and combinations thereof. The absorbent core 13 is mainly arranged in the crotch area 30 and can be a composite material made of laminated liquid-absorbing raw materials. As a liquid-absorbing raw material, liquid-absorbing fibers such as pulp fibers can be used, for example. In addition, the absorbent core 13 can contain, for example, highly absorbent polymers as liquid-absorbing particles, or it can contain liquid-absorbing raw materials other than liquid-absorbing fibers and liquid-absorbing particles.

[0047] Reference Figure 2 and Figure 4 A pair of three-dimensional guards 2 may be arranged on the body-facing top layer 11 of the absorbent sheet 1, which are arranged opposite each other in the transverse direction W, and each three-dimensional guard 2 extends in the longitudinal direction L, thereby preventing the spread of liquid in the transverse direction W. In one embodiment, the three-dimensional guard 2 may extend in the longitudinal direction L from the front edge 201 to the rear edge 401. In the packaged state of the absorbent article 10, the end of the three-dimensional guard 2 that is relatively far from the longitudinal central axis X in the transverse direction W is engaged to the absorbent sheet 1, while the other end of the three-dimensional guard 2 that is relatively close to the longitudinal central axis X in the transverse direction W is movable relative to the absorbent sheet 1. It is understood that the three-dimensional guard 2 may be engaged to the top layer 11 or the bottom layer 12 of the absorbent sheet 1.

[0048] The absorbent article 10 of this utility model will be described in more detail below.

[0049] Top layer

[0050] The topsheet 11 can be made of any woven, nonwoven, or film sheet material that is easily permeable by bodily effluent that may come into contact with the body-facing surface of the topsheet 11. In various embodiments, the topsheet 11 can be constructed from various nonwoven webs such as meltblown webs, spunbond webs, hydroentangled webs, or air-permeable combined carded webs. Examples of suitable materials for the topsheet 11 include, but are not limited to, natural fiber webs (such as cotton), rayon, hydroentangled webs, polyester, polypropylene, polyethylene, nylon or other thermally bondable fibers (such as bicomponent fibers), polyolefins, copolymers of polypropylene and polyethylene, linear low-density polyethylene, and combined carded webs of aliphatic esters (such as polylactic acid). Porous membranes and mesh materials can also be used, as well as laminates of these materials or combinations thereof. An example of a suitable material for the topsheet 11 is a porous polyethylene membrane material. An example of a suitable topsheet 11 can be a combined carded web made of polypropylene and polyethylene, such as a combined carded web available from Sandler Corp., Germany. U.S. Patent 4,801,494 to Datta et al., U.S. Patent 4,908,026 to Sukiennik et al., and WO 2009 / 062998 to Texol teach a variety of other materials that can be used as topsheet layer 11, each of which is incorporated herein by reference in its entirety. Additional materials for topsheet layer 11 may include, but are not limited to, those described in U.S. Patent 4,397,644 to Matthews et al., U.S. Patent 4,629,643 to Curro et al., U.S. Patent 5,188,625 to Van Iten et al., U.S. Patent 5,382,400 to Pike et al., U.S. Patent 5,533,991 to Kirby et al., U.S. Patent 6,410,823 to Daley et al., and U.S. Publication No. 2012 / 0289917 to Abuto et al., each of which is incorporated herein by reference in its entirety.

[0051] In various embodiments, the top sheet layer 11 may include a plurality of pores (not shown) formed therethrough to allow bodily effluent to more easily enter the absorbent core 13. These pores may be arranged randomly or uniformly throughout the top sheet layer 11, or they may be located in narrow longitudinal strips or bars arranged along the longitudinal centerline of the absorbent article 10. The size, shape, diameter, and number of pores may vary to suit the specific needs of the absorbent article.

[0052] In various embodiments, the basis weight of the top sheet 11 can range from about 5 gsm, 10 gsm, 15 gsm, 20 gsm, or 25 gsm to about 50 gsm, 100 gsm, 120 gsm, 125 gsm, or 150 gsm. For example, in one embodiment, the top sheet 11 can be constructed from an air-permeable bonded carded web with a basis weight ranging from about 15 gsm to about 100 gsm. In another example, the top sheet 11 can be constructed from an air-permeable bonded carded web with a basis weight ranging from about 20 gsm to about 50 gsm, such as an air-permeable bonded carded web readily available from nonwoven material manufacturers such as Xiamen Yanjan Industry and Beijing DaYuan Nonwoven Fabrics. Alternatively, open-cell membranes, such as those available from membrane suppliers such as Texol in Italy and Tredegar in the United States, can be used. In various embodiments, the top sheet 11 may be composed of a perforated polyethylene film with a basis weight in the range of about 15 gsm to about 30 gsm. In various embodiments, the top sheet 11 may be composed of cotton material and have a basis weight of about 25 gsm to about 35 gsm.

[0053] In various embodiments, the top sheet layer 11 is hydrophilic. The top sheet layer 11 may be formed of a material that is inherently hydrophilic, or it may be formed of a hydrophobic material that is then coated with a hydrophilic coating, such as a surfactant.

[0054] Absorption core

[0055] The absorbent core 13 may be positioned between the top layer 11 and the bottom layer 12. The absorbent core 13 can typically be any single-layer structure or combination of layer components, exhibiting a degree of compressibility, fit, non-irritation to the wearer's skin, and the ability to absorb and retain liquids and other bodily excretions. In various embodiments, the absorbent core 13 may be formed from a variety of different materials and may comprise any number of desired layers. For example, the absorbent core 13 may comprise one or more (e.g., two) layers of absorbent web material including: cellulose fibers (e.g., wood pulp fibers), other natural fibers, synthetic fibers, woven or nonwoven sheets, loosely woven webs or other stabilized structures, superabsorbent materials, binder materials, surfactants, selected hydrophobic and hydrophilic materials, pigments, detergents, odor control agents, and combinations thereof. In one embodiment, the absorbent web material may comprise a matrix of cellulose fibers and may also include superabsorbent materials. The cellulose fibers may comprise blends of wood pulp fibers. An example of wood pulp fluff can be found in the trade name NB 416 of Weyerhaeuser Corp., which is a bleached, highly absorbent wood pulp containing primarily softwood fibers.

[0056] In various embodiments, the absorbent core 13 may include optional amounts of superabsorbent material, if desired. Examples of suitable superabsorbent materials may include poly(acrylic acid), poly(methacrylic acid), poly(acrylamide), poly(vinyl ether), copolymers of maleic anhydride with vinyl ether and α-olefins, poly(vinylpyrrolidone), poly(vinylmorpholinone), poly(vinyl alcohol), and their salts and copolymers. Other superabsorbent materials may include unmodified and modified natural polymers, such as hydrolyzed acrylonitrile-grafted starch, acrylic acid-grafted starch, methylcellulose, deacetylated chitosan, carboxymethyl cellulose, hydroxypropyl cellulose, and natural gums such as alginate, xanthan gum, locust bean gum, etc. Mixtures of natural and wholly or partially synthetic superabsorbent polymers may also be used. The superabsorbent material may be present in the absorbent core 13 in any amount as desired.

[0057] Regardless of the combination of absorbent materials used in the absorbent core 13, the absorbent materials can be formed into a web structure using various conventional methods and techniques. For example, the absorbent web can be formed using techniques such as, but not limited to, dry forming, air forming, wet forming, foam forming, and combinations thereof. Co-formed nonwoven materials can also be used. Methods and equipment for performing such techniques are well known in the art.

[0058] The shape of the absorbent core 13 can vary as needed and can include any of a variety of shapes, including but not limited to triangles, rectangles, dog-bone shapes, and ovals. In various embodiments, the absorbent core 13 may have a shape that generally corresponds to the overall shape of the absorbent panel 1. The size of the absorbent core 13 may be substantially similar to the size of the absorbent panel 1, but it should be understood that although the size of the absorbent core 13 is similar, it is generally smaller than the size of the entire absorbent panel 1 in order to be adequately accommodated therein.

[0059] For example, suitable materials and / or structures for the absorber core 13 may include, but are not limited to, those described in U.S. Patent 4,610,678 to Weisman et al., U.S. Patent 6,060,636 to Yahiaoui et al., U.S. Patent 6,610,903 to Latimer et al., U.S. Patent 7,358,282 to Krueger et al., and U.S. Publication No. 2010 / 0174260 to Di Luccio et al., the entire contents of each of which are hereby incorporated by reference.

[0060] As described above, in various embodiments, the absorbent core 13 may be a single-layer structure and may include, for example, a matrix of cellulose fluff and superabsorbent material. In various embodiments, the absorbent core 13 may have at least two layers of material, such as a body-facing layer and a clothing-facing layer. In various embodiments, the two layers may be identical to each other. In various embodiments, the two layers may be different from each other. In such embodiments, the two layers may provide different absorption properties that are considered suitable for the absorbent article. In various embodiments, the body-facing layer of the absorbent core 13 may be composed of an air-laid material, and the clothing-facing layer of the absorbent core 13 may be composed of a compressed sheet containing a superabsorbent polymer. In such embodiments, the air-laid material may have a basis weight of about 40 gsm to about 200 gsm, and the compressed sheet containing the superabsorbent polymer may be a cellulose fluff-based material, which may be a combination of cellulose pulp and SAP encapsulated by a tissue carrier, having a basis weight of about 40 gsm to about 400 gsm.

[0061] film layer

[0062] The backing layer 12 of an absorbent article is typically liquid-impermeable and is the part of the absorbent article facing the wearer's clothing. The backing layer 12 allows air or vapor to pass through the absorbent article while still preventing liquid passage. Any liquid-impermeable material can typically be used to form the backing layer 12. The specific structure and composition of the backing layer 12 can be selected from a variety of known membranes and / or fabrics, with specific materials appropriately chosen to provide desired levels of liquid barrier, strength, abrasion resistance, tactile properties, aesthetics, etc. The backing layer 12 can consist of a single layer or multiple layers, and these single or multiple layers can themselves comprise similar or different materials. Suitable materials that can be used include microporous polymer membranes, such as polyolefin membranes or polyethylene or polypropylene, nonwoven materials and nonwoven laminates, and membrane / nonwoven laminates. The specific structure and composition of the backing layer 12 can be selected from a variety of known membranes and / or fabrics, with specific materials appropriately chosen to provide desired levels of liquid barrier, strength, abrasion resistance, tactile properties, aesthetics, etc. In various embodiments, a polyethylene film with a thickness of about 0.2 mil or 0.5 mil to about 3.0 mil or 5.0 mil can be used. An example of the substrate layer 12 can be a polyethylene film, such as one available from Pliant Corp., Schaumburg, Illinois, USA. Another example may include a calcium carbonate-filled polypropylene film. In yet another embodiment, the substrate layer 12 can be a hydrophobic nonwoven material with water-repellent properties, such as a nonwoven laminate, an example of which may be a spunbond, meltblown, meltblown-spunbond four-layer laminate.

[0063] In various embodiments, the backing layer 12 can be a two-layer structure, comprising an outer layer and an inner layer that can be bonded together. The outer layer can be any suitable material and can be a material that provides the wearer with a generally fabric-like texture or appearance. An example of such a material could be a 100% polypropylene bonded combed web with a diamond-patterned bonding pattern, such as 30gsm Sawabond or an equivalent material, available from Sandler AG, Germany. Another example of a suitable material for the outer layer could be a 20gsm spunbond polypropylene nonwoven web. The inner layer can be vapor-permeable (i.e., “breathable”) or vapor-impermeable. The inner layer can be made of a thin plastic film, but other liquid-impermeable materials may also be used.

[0064] The inner layer prevents liquid bodily waste from leaking from absorbent materials and wetting items such as sheets and clothing, as well as the wearer and caregiver. Examples of materials used for the inner layer could be printed 19gsm Berry Plastics XP-8695H film or equivalent materials commercially available from Berry Plastics Corporation, Evansville, IN, US.

[0065] Suitable film layer 12 may be made of materials such as those described in U.S. Patent 4,578,069 to Whitehead et al., U.S. Patent 4,376,799 to Tusim et al., U.S. Patent 5,695,849 to Shawver et al., U.S. Patent 6,075,179 to McCormack et al., and U.S. Patent 6,376,095 to Cheung et al., each of which is incorporated herein by reference in its entirety.

[0066] 3D protective enclosure example 1

[0067] exist Figure 2 and Figure 3In the illustrated embodiment, the three-dimensional enclosure 2 includes an inner hydrophobic material layer 22 and an outer softening material layer 21. The softening material layer 21 is more flexible than the hydrophobic material layer 22. The softening material layer 21 folds around the hydrophobic material layer 22 at least at the free end of the three-dimensional enclosure 2 and is respectively joined to opposite sides of the hydrophobic material layer 22 at the fixed end of the three-dimensional enclosure 2, thereby enclosing a first cavity 23 and a second cavity 24 located on opposite sides of the hydrophobic material layer 22. An elastic material 25 is arranged in the first cavity 23 and / or the second cavity 24. Since the softening material layer 21 is the part that contacts the human body, the flexibility of the softening material layer 21 is preferably greater than that of the hydrophobic material layer 22, that is, the softening material layer 21 is more flexible than the hydrophobic material layer 22. Furthermore, the length of the softening material layer 21 in the longitudinal direction L of the absorbent article can be greater than the length of the hydrophobic material layer 22 in the longitudinal direction L of the absorbent article, thereby ensuring that the part of the three-dimensional protective enclosure 2 that comes into contact with the human body is a soft, low-stiffness softening material layer 21. In other embodiments, the length of the softening material layer 21 in the longitudinal direction L of the absorbent article can be no greater than the length of the hydrophobic material layer 22 in the longitudinal direction L of the absorbent article, thereby ensuring that the three-dimensional protective enclosure 2 has good water-proof and leak-proof performance. In a preferred embodiment, the softening material layer 21 is bent to include at least two opposing and spaced vertical segments, and a bending area 26 connecting the two vertical segments. The elastic material 25 is preferably located in the area near the bending area 26 within the first cavity 23 and / or the second cavity 24. It is understood that softness has multiple evaluation dimensions, such as objectively measurable data like the material's basis weight and thickness, or it can be a consumer's subjective sensory experience, typically including a smooth or rough touch; a soft and flexible or stiff stiffness; and a fluffy and soft or flat and close-fitting fluffy feel. In some embodiments, the softening material layer 21 may have a basis weight of 15-30 gsm, and the softening material layer 21 of the outer roll may have a thickness of 0.25-0.6 mm at a pressure of 0.2 kPa. Furthermore, the softening material layer 21, measured by a hand-O-Meter, has a softness of 2-7 g in the machine direction (MD) and a softness of 1.5-3 g in the cross direction (CD). In other embodiments, the hydrophobic material layer 22 may have a basis weight of 10-16 gsm, and the hydrophobic material layer 22 of the outer roll may have a thickness of 0.12-0.18 mm at a pressure of 0.2 kPa. Furthermore, the hydrophobic material layer 22 was measured to have a softness of 2.5-3.5g in the machine direction and 1.2-1.8g in the flat knitting direction using a hand-O-Meter.

[0068] In one implementation, such as Figure 2 and Figure 3 As shown, the softening material layer 21 can be bonded to the hydrophobic material layer 22 in a region outside the elastic material 25 by an adhesive 41. The adhesive 41 can be located at any suitable position in the first cavity 23 and / or the second cavity 24.

[0069] Furthermore, the softening material layer 21 and the hydrophobic material layer 22 can be at least one of nonwoven materials, membrane materials, and composite materials of nonwoven materials and membrane materials. More specifically, the softening material layer 21 is preferably a soft three-layer spunbond nonwoven fabric, i.e., at least one of soft SSS material or hot-air nonwoven fabric (TABCW). The hydrophobic material layer 22 is preferably a hydrostatically resistant spunbond-meltblown-spunbond three-layer composite nonwoven material, i.e., SMS material.

[0070] The hydrophobic material layer 22 may be made of a nonwoven material that is substantially impermeable to liquids and resistant to hydrostatic pressure. A useful combination of nonwoven materials may include spunbond, meltblown, or SMS fiber webs, wherein the nonwoven material comprises an outer layer of spunbond thermoplastic (e.g., polyolefin) and an inner layer of meltblown thermoplastic. In other embodiments, the hydrophobic material layer 22 may be a multilayer spunbond-meltblown composite nonwoven material, such as SMMSS, SSMMS, etc. The hydrophobic material layer 22 suitable for this embodiment includes those of the SMS type, purchased under the trade name LIVSEN SMS 13 from Toray Polytech Nantong China, under the trade name SM15009270 from FQN Hazlet NJ, and under the trade name B10160HS from Fibertex Aalborg Denmark. In other embodiments, the hydrophobic material layer 22 may also be a waterproof membrane.

[0071] The hydrophobic material layer 22 may have a hydrostatic head greater than about 2 mbar, or greater than about 3 mbar, or greater than about 4 mbar. Furthermore, the hydrophobic material layer 22 may have a hydrostatic head less than about 200 mbar, or less than about 100 mbar, or less than about 75 mbar, or less than about 50 mbar, or less than about 25 mbar, or less than about 15 mbar. The hydrophobic material layer 22 may have an opacity of about 15% to about 50% Hunter opacity, or about 20% to about 45% Hunter opacity. The hydrophobic material layer 22 may have an opacity of about 45% to about 75% Hunter opacity; or about 50% to about 70% Hunter opacity. The hydrophobic material layer 22 may have an opacity less than about 50 mbar. 3 / m 2 / min; or less than approximately 45m 3 / m 2The air permeability is approximately 5 m / min. The hydrophobic material layer 22 can have a permeability greater than approximately 5 m. 3 / m 2 / min; or greater than approximately 10m 3 / m 2 / min; or greater than approximately 15m 3 / m 2 / min; or greater than approximately 20m 3 / m 2 / min air permeability.

[0072] Furthermore, the elastic material 25 in this invention can be one or more of the following: elastic strands 251, polymer films, elastic nonwoven fabrics, and elastic composite materials. The elastic material 25 is attached to at least one of the top sheet layer 11 and the bottom sheet layer 13, and has a desired degree of elasticity. The elastic material 25 can be attached to the softening material layer 21 and / or the hydrophobic material layer 22 by any suitable means, for example, including an adhesive 41. The elastic material 25 can be stretched and then adhered to or attached to at least one of the softening material layer 21 and the hydrophobic material layer 22. In other aspects, the elastic material 25 is adhered to at least one of the softening material layer 21 and the hydrophobic material layer 22, and can be plasticized or contracted, for example, by heating, thereby applying an elastic retraction force to the three-dimensional enclosure 2.

[0073] In one suitable aspect, the elastic strand 251 used in this invention may include products under the trade name LYCRA. ® Dry-spun polyspun spandex elastic yarns are sold and available from Invista in Wichita, Kansas, USA. Other suitable materials include vertical filament laminates (VFLs), examples of which are described in U.S. Patent No. 6,916,750 to Thomas et al., which is incorporated herein by reference; porous elastic membranes, examples of which are described in U.S. Patent No. 7,803,244 to Siqueira et al., September 28, 2010, and U.S. Patent No. 8,361,913 to Siqueira et al., January 29, 2013, the entire contents of which are incorporated herein by reference; and other elastic... Laminated materials, such as single-sided and double-sided spandex laminates, stretch-bonded laminates (SBLs), and continuous filament stretch-bonded laminates (CFSBLs), are exemplified in U.S. Patent No. 5,385,775 to Wright, January 31, 1995; U.S. Patent No. 6,057,024 to Mleziva et al., May 2, 2000; and U.S. Patent No. 6,969,441 to Welch et al., November 29, 2005, all of which are incorporated herein by reference.

[0074] Furthermore, in order to reduce the pressure applied to the wearer's groin by the three-dimensional guardrail 2, the fineness of the elastic strands 251 can be 20 to 800 dtex, the number of elastic strands 251 can be 1 to 20, and the center distance between two adjacent elastic strands 251 is no more than 5 mm.

[0075] In this embodiment, by setting a relatively fine and numerous elastic strands 251 in the first cavity 23 and / or the second cavity 24, the pressure of the three-dimensional guardrail 2 on the wearer's groin is dispersed, effectively preventing and reducing the occurrence of red marks or chafing. In addition, a softening material layer 21 is set on the outside of the hydrophobic material layer 22 to reduce the friction of the three-dimensional guardrail 2 on the wearer's groin and improve wearing comfort.

[0076] Example 2 of three-dimensional protective enclosure

[0077] In one implementation, such as Figure 4 and Figure 5 As shown, the three-dimensional enclosure 2 includes at least a folded hydrophobic material layer 22, wherein the hydrophobic material layer 22 is bent at least at the free end of the three-dimensional enclosure 2 to form a cavity 27 containing an elastic material 25, and is bonded together at the fixed end of the three-dimensional enclosure 2 to seal the cavity 27. In a preferred embodiment, the hydrophobic material layer 22 is bent to include at least two opposing and spaced-apart vertical segments, and a bending region 26 connecting the two vertical segments, wherein the elastic material 25 is preferably located within the cavity 27 near the bending region 26. The elastic material 25 is disposed within the cavity 27, and the two vertical segments of the hydrophobic material layer 22 are joined together outside the area of ​​the elastic material 25. The adhesive 41 can be located at any suitable position within the cavity 27.

[0078] The hydrophobic material layer 22 may be made of a nonwoven material that is substantially impermeable to liquids and resistant to hydrostatic pressure. A useful combination of nonwoven materials may include spunbond, meltblown, or SMS fiber webs, wherein the nonwoven material comprises an outer layer of spunbond thermoplastic (e.g., polyolefin) and an inner layer of meltblown thermoplastic. In other embodiments, the hydrophobic material layer 22 may be a multilayer composite nonwoven material such as SMMSS or SSMMS. The hydrophobic material layer 22 suitable for this embodiment includes those of the SMS type, available under the trade name LIVSEN SMS 13 from Toray Polytech Nantong China, trade name SM15009270 from FQN Hazlet NJ, and trade name B10160HS from Fibertex Aalborg Denmark.

[0079] The hydrophobic material layer 22 may have a hydrostatic head greater than about 2 mbar, or greater than about 3 mbar, or greater than about 4 mbar. Furthermore, the hydrophobic material layer 22 may have a hydrostatic head less than about 200 mbar, or less than about 100 mbar, or less than about 75 mbar, or less than about 50 mbar, or less than about 25 mbar, or less than about 15 mbar. The hydrophobic material layer 22 may have an opacity of about 15% to about 50% Hunter opacity, or about 20% to about 45% Hunter opacity. The hydrophobic material layer 22 may have an opacity of about 45% to about 75% Hunter opacity; or about 50% to about 70% Hunter opacity. The hydrophobic material layer 22 may have an opacity less than about 50 mbar. 3 / m 2 / min; or less than approximately 45m 3 / m 2 The air permeability is approximately 5 m / min. The hydrophobic material layer 22 can have a permeability greater than approximately 5 m. 3 / m 2 / min; or greater than approximately 10m 3 / m 2 / min; or greater than approximately 15m 3 / m 2 / min; or greater than approximately 20m 3 / m 2 / min air permeability.

[0080] Furthermore, the elastic material 25 in this embodiment can be one or more of elastic strands, polymer films, elastic nonwoven fabrics, and elastic composite materials. The elastic material 25 is attached to the hydrophobic material layer 22 and has a desired degree of elasticity. The elastic material 25 can be attached to the hydrophobic material layer 22 by any suitable means, for example, including an adhesive 41. The elastic material 25 can be stretched before being adhered to the hydrophobic material layer 22. In other aspects, the elastic material 25 is adhered to the hydrophobic material layer 22 and can be plasticized or shrunk, for example, by heating, thereby applying an elastic recoil force to the three-dimensional enclosure 2.

[0081] In a suitable aspect, the elastic strand 251 applied to this embodiment may include products marketed under the trade name LYCRA. ®Dry-spun polyspun spandex elastic yarns are sold and available from Invista in Wichita, Kansas, USA. Other suitable materials include vertical filament laminates (VFLs), examples of which are described in U.S. Patent No. 6,916,750 to Thomas et al., which is incorporated herein by reference; porous elastic membranes, examples of which are described in U.S. Patent No. 7,803,244 to Siqueira et al., September 28, 2010, and U.S. Patent No. 8,361,913 to Siqueira et al., January 29, 2013, the entire contents of which are incorporated herein by reference; and other elastic... Laminated materials, such as single-sided and double-sided spandex laminates, stretch-bonded laminates (SBLs), and continuous filament stretch-bonded laminates (CFSBLs), are exemplified in U.S. Patent No. 5,385,775 to Wright, January 31, 1995; U.S. Patent No. 6,057,024 to Mleziva et al., May 2, 2000; and U.S. Patent No. 6,969,441 to Welch et al., November 29, 2005, all of which are incorporated herein by reference.

[0082] Furthermore, in order to reduce the pressure exerted on the wearer's groin by the three-dimensional guardrail 2, the fineness of the elastic strands 251 can be 20 to 800 dtex, the number of elastic strands 251 can not exceed 10, and the center distance between two adjacent elastic strands 251 is not greater than 5 mm.

[0083] In this embodiment, by setting a large number of thin elastic strands 251 in the chamber 27, the pressure of the three-dimensional guardrail 2 on the wearer's groin is dispersed, effectively preventing and reducing the occurrence of red marks or chafing, thereby reducing the friction of the absorbent material on the wearer's groin and improving wearing comfort.

[0084] This utility model does not involve any improvement to the materials. All the nonwoven materials, membrane materials, elastic materials and composite materials mentioned above are commercially available.

[0085] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0086] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. An absorbent article, comprising: Absorbent fabric piece (1) having a top sheet layer (11) facing the human body and a bottom sheet layer (12) arranged opposite to the top sheet layer (11) and facing the garment. A three-dimensional protective enclosure (2), one end of which is fixedly joined to the absorbent sheet (1) and the opposite end is free relative to the absorbent sheet (1), characterized in that, The three-dimensional enclosure (2) includes a hydrophobic material layer (22) on the inner side and a softening material layer (21) on the outer side. The softening material layer (21) is more flexible than the hydrophobic material layer (22). The softening material layer (21) is folded around the hydrophobic material layer (22) at least at the free end of the three-dimensional enclosure (2) and is respectively joined to the opposite sides of the hydrophobic material layer (22) at the fixed end of the three-dimensional enclosure (2), thereby enclosing a first cavity (23) and a second cavity (24) on the opposite sides of the hydrophobic material layer (22). An elastic material (25) is arranged in the first cavity (23) and / or the second cavity (24).

2. The absorbent article according to claim 1, characterized in that, The softening material layer (21) and the hydrophobic material layer (22) are selected from at least one of the group consisting of nonwoven materials, membrane materials, and composite materials of nonwoven materials and membrane materials.

3. The absorbent article according to claim 2, characterized in that, The softening material layer (21) is at least one of three layers of spunbond nonwoven fabric or hot air nonwoven fabric.

4. The absorbent article according to claim 2, characterized in that, The hydrophobic material layer (22) is a waterproof membrane or a hydrostatic pressure resistant spunbond meltblown composite nonwoven material.

5. The absorbent article according to claim 1, characterized in that, The length of the softening material layer (21) in the longitudinal direction (L) of the absorbent article is not greater than the length of the hydrophobic material layer (22) in the longitudinal direction (L) of the absorbent article.

6. The absorbent article according to claim 1, characterized in that, The softening material layer (21) is fixedly bonded to the hydrophobic material layer (22) in the area outside the elastic material (25).

7. The absorbent article according to claim 1, characterized in that, The elastic material (25) is located in the region of the first cavity (23) and / or the second cavity (24) near the bending area (26) of the softening material layer (21).

8. The absorbent article according to claim 1, characterized in that, The elastic material (25) is one or more of the following: elastic strands, polymer films, elastic nonwoven fabrics, and elastic composite materials.

9. The absorbent article according to claim 8, characterized in that, The elastic material (25) is an elastic strand (251), the fineness of the elastic strand (251) is 20 to 800 dtex, the number of elastic strands (251) is 1 to 20, and the center distance between two adjacent elastic strands (251) is no more than 5 mm.

10. An absorbent article comprising: Absorbent fabric piece (1) having a top sheet layer (11) facing the human body and a bottom sheet layer (12) arranged opposite to the top sheet layer (11) and facing the garment. A three-dimensional protective enclosure (2), one end of which is fixedly joined to the absorbent sheet (1) and the opposite end is free relative to the absorbent sheet (1), characterized in that, The three-dimensional enclosure (2) includes at least a folded hydrophobic material layer (22), wherein the hydrophobic material layer (22) is bent at least at the free end of the three-dimensional enclosure (2) to form a cavity (27) containing an elastic material (25), and is bonded together at the fixed end of the three-dimensional enclosure (2) to close the cavity (27). The elastic material (25) is located in the cavity (27) near the bending area (26) of the hydrophobic material layer (22). The elastic material (25) is no more than 10 elastic strands (251) with a fineness of 20 to 800 dtex. The center distance between two adjacent elastic strands (251) is no more than 5 mm. The material of the hydrophobic material layer (22) is a hydrostatic pressure resistant spunbond meltblown nonwoven material.

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