Pant-type disposable absorbent article

Abstract

The utility model relates to personal hygiene nursing products, especially a short pants type disposable absorbent article. The absorbent article is divided into front waist area, back waist area and crotch area along the longitudinal direction, the crotch area is connected between the front waist area and back waist area and has the first elastic area for adhering the crotch of wearer, the absorbent article includes along the thickness direction: top layer, is arranged as facing the body of wearer, bottom film, is opposite with top layer along the thickness direction and is arranged as facing the clothes of wearer, absorbent core, is sandwiched between top layer and bottom film and extends along the longitudinal direction in the crotch area, the back waist area has the second elastic area corresponding to the wearer's groin part, the second elastic area is spaced apart and arranged in the rear of the first elastic area longitudinal direction, the second elastic area has the elastic material, and after the elastic material retracts, the absorbent article adheres the groin part of wearer. The absorbent article effectively fills up the gap that the traditional product is prone to, improves the adhering effect with the wearer, satisfies the demand of consumer to absorbent article.

Description

Technical Field

[0001] This utility model relates to personal hygiene care products, and more particularly to a shorts-type disposable absorbent product. Background Technology

[0002] Currently, many short-sleeved disposable personal care products, such as baby pull-ups, women's overnight pants, and adult incontinence pants, only have a fitted structure in the crotch area. Their design aims to use the relatively tight crotch area to initially secure the product to the key parts of the body, while simultaneously using the absorbent core to effectively catch excrement. For example, some products add elastic material to the crotch area to conform to the body's curves to a certain extent, maintaining a basic fit during standing and normal walking, preventing excessive shifting.

[0003] However, from a product design perspective, the shape and size of most such products fail to adequately consider the complex physiological curves of the groin area. Their overall structure often employs a simple and conventional design, lacking targeted three-dimensional tailoring or special structural design for the groin region. This results in personal care products failing to fit snugly into the groin area when the user is in different positions such as standing, walking, sitting, or lying down, easily creating gaps between the product and the skin on both sides of the groin.

[0004] From a practical user experience perspective, this design flaw causes numerous problems for users. The product's coverage and fit in the groin area are inconsistent, making it difficult to form a continuous and effective protective barrier. This easily leads to leakage of excrement through the groin gaps, affecting both safety and comfort, and failing to meet users' core needs for personal care products.

[0005] In some existing products, elastic material is usually placed in the crotch area to enhance the fit of the groin area. However, this design can only improve the fit of the crotch area, and there will still be a large gap in the groin area, which affects the functionality and comfort of the product.

[0006] Therefore, it is necessary to propose a disposable personal care product in the form of shorts that fits the groin area and is comfortable to wear. Utility Model Content

[0007] Therefore, the purpose of this invention is to provide a disposable absorbent product in the form of shorts that fits the groin area of ​​the human body and is comfortable to wear.

[0008] This utility model provides a disposable absorbent garment in the form of shorts, having mutually perpendicular longitudinal and transverse directions, and a thickness direction perpendicular to the longitudinal and transverse directions. The absorbent garment is divided into a front waist area, a back waist area, and a crotch area along the longitudinal direction. The crotch area is connected between the front waist area and the back waist area and has a first elastic area for conforming to the wearer's crotch. The absorbent garment includes: a liquid-permeable top layer arranged facing the wearer's body; a liquid-impermeable bottom film disposed opposite to the top layer along the thickness direction and arranged facing the wearer's clothing; an absorbent core sandwiched between the top layer and the bottom film and extending along the longitudinal direction in the crotch area; the back waist area has a second elastic area corresponding to the wearer's groin area, the second elastic area being spaced behind the first elastic area, and the second elastic area containing an elastic material. After the elastic material retracts, the absorbent garment conforms to the wearer's groin area.

[0009] In one embodiment, the elastic material is arranged at intervals along the longitudinal direction or along the transverse direction within the second elastic region.

[0010] In one embodiment, the elastic material is an elastic strand, and the second elastic region has 4 to 300 of the elastic strands, with the center distance between two adjacent elastic strands being 1 mm to 50 mm.

[0011] In one embodiment, the elastic material has a tensile strength of 0.9-2 cN / dtex, an elongation at break of 500%-800%, a fineness of 40-1200 dtex, and an elastic modulus of 0.01-1 N / m. 2 The elastic recovery rate is as follows: when the elongation of the elastic material is ≤400%, the recovery rate is 95-99%; when the elongation of the elastic material is ≤200%, the recovery rate is 100%.

[0012] In one embodiment, the elastic material is one or more of spandex filaments, polymer films, elastic nonwoven fabrics, and elastic composite materials.

[0013] In one embodiment, the second elastic region is located between any two adjacent layers of the absorbent article in the thickness direction.

[0014] In one embodiment, the absorbent article further includes a waistband located on the side of the bottom film away from the absorbent core in the thickness direction, the waistband including an inner waistband and an outer waistband from the inside to the outside in the thickness direction, and the second elastic region being located between the absorbent core and the bottom film, or the second elastic region being located between the inner waistband and the outer waistband.

[0015] In one embodiment, the second elastic region is arranged symmetrically about the longitudinal centerline of the absorbent article.

[0016] In one embodiment, the outer contour of the second elastic region is generally rectangular.

[0017] In one embodiment, the outer contour of the second elastic region is generally trapezoidal, with the upper base of the trapezoid located in front of the lower base in the longitudinal direction.

[0018] In this invention, an elastic zone corresponding to the wearer's groin area is provided in the lower back region. This elastic zone contains elastic material, which, after retracting, allows the absorbent product to fit snugly against the wearer's groin area. This effectively fills the gaps that are prone to occur in traditional products in this area, improving the fit between the absorbent product and the wearer. Furthermore, the elastic zones in the lower back region are spaced apart on the longitudinal rear side of the elastic zones in the crotch area, preventing excessive pressure on the wearer's private parts and further enhancing the product's comfort, thus meeting consumers' needs for absorbent products. Attached Figure Description

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is one embodiment of the shorts-type disposable personal hygiene product of this utility model;

[0021] Figure 2 This is another embodiment of the shorts-type disposable personal hygiene product of this utility model;

[0022] Figure 3 This is another embodiment of the shorts-type disposable personal hygiene product of this utility model;

[0023] Figure 4 yes Figure 1 One embodiment of the cross-sectional view at point AA;

[0024] Figure 5 yes Figure 1 Another implementation of the cross-sectional view at point AA.

[0025] Explanation of reference numerals in the attached figures

[0026] 1-Front waist area; 2-Rear waist area; 21-Second elastic zone; 211-Elastic material; 3-Crotch area; 31-First elastic zone; 4-Top layer; 51-Guiding layer; 52-Flow layer; 6-Absorbent core; 7-Bottom film; 8-Waist circumference; 81-Inner waist circumference; 82-Outer waist circumference. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” “front,” “back,” 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.

[0030] 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.

[0031] Terminology Definition

[0032] Regarding absorbent articles, “disposable” means absorbent articles that are not typically intended to be washed or otherwise restored or reused as absorbent articles (i.e., they are intended to be discarded after a single use and are preferably recyclable, compostable or disposed of in an environmentally compatible manner).

[0033] "Absorbent articles" herein refers to articles that can be placed close to 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. Such absorbent articles as described herein are intended to be discarded after their limited use period, rather than washed or otherwise restored for reuse. It should be understood that this disclosure applies to a variety of disposable absorbent articles, including but not limited to feminine hygiene products such as sanitary napkins, panty liners, etc., without departing from the scope of this disclosure.

[0034] As used herein, the term "nonwoven" or "non-woven fabric" generally refers to a web with a layered structure of individual fibers or yarns, but not in a manner identifiable as a knitted fabric. Examples of suitable nonwoven or nonwoven fabrics or webs include, but are not limited to, meltblown webs, spunbond webs, bonded-carded webs, air-jet webs, co-formed webs, and hydroentangled webs.

[0035] As used herein, the term "meltblown fiber web" generally refers to a nonwoven web prepared by means of a method in which molten thermoplastic material is extruded as molten fibers through numerous, typically circular, fine die capillary pores into a stream of aggregated high-speed gas (e.g., air), which thins the fibers of the molten thermoplastic material to reduce their diameter. The meltblown fibers are then transported by a high-speed gas flow and placed on a collection surface to form a web of randomly distributed meltblown fibers. Generally, the meltblown fibers can be continuous or discontinuous microfibers, typically less than 10 micrometers in diameter, and are usually viscous when placed on the collection surface.

[0036] As used herein, the term "spunbond web" generally refers to a web comprising substantially continuous fibers of small diameter. These fibers are produced by extruding molten thermoplastic material through numerous, typically circular, small spinneret capillary openings, followed by a rapid reduction in the diameter of the extruded fibers via, for example, lead-out drawing and / or other known spunbonding mechanisms. "Proximal" and "distal" refer to the relative position of elements close to or far from the longitudinal or lateral centerline of the structure, respectively (e.g., relative to the same longitudinal axis, the proximal edge of a longitudinally extending element is closer to the longitudinal axis than the distal edge of the same element).

[0037] "Facing the body" and "facing the clothing" refer to the relative positions of components or the relative positions of the surfaces of a component or a group of components, respectively. "Facing the body" means that during wear, a component or surface is closer to the wearer than some other components or surfaces. "Facing the clothing" means that during wear, a component or surface is further away from the wearer than some other components or surfaces (i.e., the component or surface is closer to the wearer's clothing, which may be worn over a disposable absorbent material).

[0038] As used herein, the terms "stretchable" or "extensible" generally refer to the dimensional stretchability of a material in the direction of stress, such that the dimension in the direction of stress can be extended by at least about 25%, or at least about 50%, or at least about 75% compared to its natural relaxed state. Stretchable materials do not necessarily have restorative properties or need to have significant restorative properties. For example, elastic materials are stretchable materials with restorative properties. Meltblown fiber webs can be stretchable, but their restorative properties are significantly reduced compared to their extensibility, or even non-restorative, and therefore they are stretchable but inelastic materials.

[0039] As used herein, the terms "elastomer" or "elastic" generally refer to a material that, when a tensile force is applied, is stretched in at least one direction, and when the tensile force is released, it shrinks / recovers to approximately its original size. For example, a stretched material may have an elongation at least about 50% longer than its unstretched length in its relaxed state, and, when the tensile force is released, it may recover to a length within at least 50% of its elongated length.

[0040] As used herein, the term "elastic material" includes elongated materials that are elastic, such as, but not limited to, elastic rubber bands, elastic filaments, elastic bands, elastic films, elastic fabrics (e.g., elastic fiber nonwoven sheets), and elastic composite materials. Elastic rubber bands, for example, can be made from spandex using a spinning process on a warp beam.

[0041] As used herein, the term "bonded" refers to the joining, adhesion, connection, attachment, etc., of two elements. Two elements are considered to be bonded together when they are joined, adhered, connected, attached, etc., directly or indirectly to each other, such as when bonded to an intermediate element. Bonding can be achieved, for example, by adhesives, pressure bonding, thermal bonding, ultrasonic bonding, splicing, stitching, and / or welding.

[0042] 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.

[0043] Shorts-type disposable absorbent products

[0044] refer to Figures 1 to 5 The illustration shows an exemplary embodiment of the shorts-type disposable absorbent article (hereinafter referred to as "absorbent article") of this utility model. Figures 1 to 3 The illustrations provide plan view diagrams of three embodiments of the absorbent article; Figure 4 yes Figure 1 One embodiment of the cross-sectional view at point AA. Figure 5 yes Figure 1 Another implementation of the cross-sectional view at point AA. Figure 4 and Figure 5 The composition of the absorbent article in the thickness direction is shown. Although certain features of this disclosure may be described and illustrated with respect to adult incontinence clothing for illustrative purposes, various aspects and embodiments of this disclosure are also applicable to diapers, trousers, swimming trunks, training pants, incontinence pants, menstrual pants, etc.

[0045] The absorbent article has mutually perpendicular longitudinal and transverse directions, a thickness direction perpendicular to the longitudinal and transverse directions, and a longitudinal centerline. The absorbent article is designed to be worn around the lower torso of a person and may have a front waist area 1, a back waist area 2, and a crotch area 3 extending between and connecting the front waist area 1 and the back waist area 2. The front waist area 1 and the back waist area 2 are those areas of the absorbent article that circumferentially conform to at least the lower torso (including, for example, the wearer's abdomen, lower back, buttocks, and hips) of the wearer. The crotch area 3 of the absorbent article is the area that will be positioned between the wearer's legs when the absorbent article is worn on the wearer.

[0046] Reference Figure 4 The absorbent article comprises, along its thickness direction: a liquid-permeable top layer 4, arranged facing the wearer's body; a liquid-impermeable bottom film 7, disposed opposite to the top layer 4 along the thickness direction and arranged facing the wearer; and an absorbent core 6, sandwiched between the top layer 4 and the bottom film 7 and extending longitudinally in the crotch area 3, wherein the crotch area 3 has a first elastic area 31 for conforming to the wearer's crotch, and the back waist area 2 has a second elastic area 21 corresponding to the wearer's groin area. The second elastic areas 21 are spaced behind the first elastic areas 31 longitudinally, and the second elastic areas 21 contain an elastic material 211. When the elastic material 211 retracts, the absorbent article conforms to the wearer's groin area.

[0047] In this invention, a second elastic zone 21 corresponding to the wearer's groin area is provided in the lower back area 2. After the elastic material 211 retracts, the absorbent product fits snugly against the wearer's groin area. This effectively fills the gaps that are prone to occur in this area in traditional products, improving the fit between the absorbent product and the wearer. Furthermore, the second elastic zone 21 in the lower back area 2 is spaced apart and positioned longitudinally behind the first elastic zone 31 in the crotch area 3, preventing excessive pressure on the wearer's private parts and further enhancing the product's comfort, thus meeting consumer demand for absorbent products.

[0048] The components and additional parts of the absorbent article will be described in more detail below.

[0049] Top floor

[0050] Top layer 4 can be a single-layer or multi-layer laminate that defines the surface in direct contact with the wearer's skin and is hydrophilic to receive bodily excretions and guide them toward the absorbent core 6. Top layer 4 preferably retains almost no liquid in its structure, thus providing a relatively comfortable and non-irritating feel while in close contact with the wearer's skin. In various embodiments, top layer 4 can be a single-layer or multi-layer composite structure, and the multi-layer composite structure itself can include similar or different materials. Top layer 4 can be constructed from various nonwoven webs such as meltblown web, spunbond web, hydroentangled web, or air-permeable bonded carded web. Examples of suitable surface materials include, but are not limited to, natural fiber webs (such as cotton), rayon, hydroentangled web, polyester, polypropylene, polyethylene, nylon or other thermally bondable fibers (such as bicomponent fibers), polyolefins, copolymers of polypropylene and polyethylene, linear low-density polyethylene, and bonded carded webs of aliphatic esters (such as polylactic acid). Perforated membrane and web materials, as well as laminates or combinations thereof, can also be used.

[0051] Top layer 4 defines the body-facing surface of the absorbent article, which can directly contact the wearer's body and is liquid-permeable to receive bodily waste. Top layer 4 is ideally provided to offer comfort and functionality in guiding bodily waste away from the wearer's body, through its own structure, and towards the absorbent core 6. Top layer 4 ideally retains almost no liquid in its structure, so as to provide a relatively comfortable and non-irritating surface near the wearer's skin of the absorbent article.

[0052] Top layer 4 can be a single layer of material or a multilayer material already laminated together. Top layer 4 can be made of any material, such as one or more woven sheets, one or more fibrous nonwoven sheets, one or more porous membrane sheets such as blown or extruded films, which can be single or multiple layers, one or more foam sheets such as fibrous webs, open-cell or closed-cell foams, coated nonwoven sheets, or any combination of these materials. This combination can be bonded, thermally or ultrasonically laminated into a uniform planar sheet structure to form top layer 4.

[0053] In various embodiments, the top layer 4 may be composed of various nonwoven webs, such as meltblown webs, spunbond webs, hydroentangled webs, or air-bonded carded webs. Examples of suitable top layer 4 materials may include, but are not limited to, natural fiber webs (e.g., cotton), rayon, hydroentangled webs, polyester, polypropylene, polyethylene, nylon or other thermally bonded fibers (e.g., bicomponent fibers) bonded carded webs, polyolefins, copolymers of polypropylene and polyethylene, linear low-density polyethylene, and aliphatic esters such as polylactic acid. Fine-porous membranes and fibrous web materials, as well as laminates and / or compositions of these materials, may also be used. A suitable example of a suitable top layer 4 may be a bonded carded web made of polypropylene and polyethylene, such as products 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 WO2009 / 062998 to Texol teach various other topsheet materials that can be used as top layer 4, each of which is incorporated herein by reference in its entirety. Other Top 4 materials may include, but are not limited to, those described in U.S. Patents 4,397,644 to Matthews et al., 4,629,643 to Curro et al., 5,188,625 to Van Iten et al., 5,382,400 to Pike et al., 5,533,991 to Kirby et al., 6,410,823 to Daley et al., and U.S. Publication 2012 / 0289917 to Abuto et al., each of which is incorporated herein by reference in its entirety.

[0054] In various embodiments, the top layer 4 may include a plurality of pores formed therethrough to allow bodily waste to more easily enter the absorbent core 6. The pores may be arranged randomly or uniformly throughout the top layer 4. The size, shape, diameter, and number of the pores may vary to suit the specific needs of the absorbent article.

[0055] In various embodiments, the top layer 4 may have a basis weight ranging 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 layer 4 may be composed of an air-bonded carded web having a basis weight ranging from about 15 gsm to about 100 gsm. In another example, the top layer 4 may be composed of an air-bonded carded web having a basis weight ranging from about 20 gsm to about 50 gsm.

[0056] In various embodiments, the top layer 4 may be at least partially hydrophilic. In various embodiments, a portion of the top layer 4 may be hydrophilic and a portion of the top layer 4 may be hydrophobic. In various embodiments, the hydrophobic portion of the top layer 4 may be an inherently hydrophobic material or may be a material treated with a hydrophobic coating.

[0057] In various embodiments, the top layer 4 may be a multi-component top layer, for example, having two or more different nonwoven or membrane materials, with the different materials positioned at different locations along the transverse direction of the absorbent article. For example, the top layer 4 may be a two- or multi-component material having a central portion positioned along and spanning the longitudinal axis of the absorbent article, with transverse side portions located on either side of the central portion and attached to each side edge of the central portion. The central portion may be made of a first material, and the side portions may be made of the same or different material as the central portion. In such embodiments, the central portion may be at least partially hydrophilic, and the side portions may be inherently hydrophobic or may be treated with a hydrophobic coating. Examples of multi-component topsheet structures are generally described in U.S. Patent 5,961,505 to Coe, U.S. Patent 5,415,640 to Kirby, and U.S. Patent 6,117,523 to Sugahara, each of which is incorporated herein by reference in its entirety.

[0058] In various embodiments, the central portion of the top layer 4 may be symmetrically positioned about the longitudinal axis of the absorbent article. This centrally longitudinally oriented central portion may be an air-bonded carded web (“TABCW”) with a basis weight between about 15 gsm and about 100 gsm. The previously described nonwoven, woven, and porous membrane top sheet materials may also be used as the central portion of the top layer 4. In various embodiments, the central portion may be composed of a TABCW material with a basis weight of about 20 gsm to about 50 gsm. Different nonwoven, woven, or membrane sheets may be used as the sides of the top layer 4. The choice of this top layer 4 material may vary based on the overall desired properties of the top layer 4. For example, it may be necessary to have a hydrophilic material in the central portion and a hydrophobic barrier material in the sides to prevent leakage and increase the dryness of the side areas. Such sides may be bonded to the central portion along or adjacent to the longitudinally oriented side edges by adhesive, thermal, ultrasonic, or other means. Conventional absorbent article construction adhesives may be used to bond the sides to the central portion. Either the central portion and / or the side portion can be treated with surfactants and / or skin-health-beneficial agents known in the art.

[0059] Base film

[0060] The bottom membrane 7 of an absorbent article is typically liquid-impermeable and is the part of the absorbent article facing the wearer's clothing. The bottom membrane 7 allows air or vapor to pass through the absorbent article while still preventing liquid passage. Any liquid-impermeable material can generally be used to form the bottom membrane 7. The specific structure and composition of the bottom membrane 7 can be selected from a variety of known membranes and / or fabrics, with specific materials appropriately chosen to provide the desired levels of liquid barrier, strength, abrasion resistance, tactile properties, aesthetics, etc. The bottom membrane 7 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 bottom membrane 7 can be selected from a variety of known membranes and / or fabrics, with specific materials appropriately chosen to provide the 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 base film 7 can be a polyethylene film. Another example may include a calcium carbonate-filled polypropylene film. In yet another embodiment, the base film 7 can be a hydrophobic nonwoven material with water-repellent properties, such as a nonwoven laminate, examples of which may be a spunbond, meltblown, meltblown-spunbond four-layer laminate.

[0061] waistline

[0062] The waist circumference 8 and / or portions thereof may be breathable and / or liquid-impermeable. The waist circumference 8 may be a single layer of liquid-impermeable material, but more preferably includes a multilayer laminated structure, wherein at least one layer is liquid-impermeable. The inner waist circumference 81 within the waist circumference 8 may be impermeable to both liquids and vapors, or may be liquid-impermeable but vapor-permeable. Furthermore, the waist circumference 8 is also contemplated to be stretchable, and more preferably elastic at least in the transverse direction of the absorbent article. In other respects, the waist circumference 8 may be stretchable in both the transverse and longitudinal directions, and more preferably elastic. The waist circumference 8 may be constructed from a single layer, multiple layers, laminates, spunbond fabric, membrane, meltblown fabric, elastic web, microporous web, bonded carded web, or foam provided by an elastomer or polymer material. In one embodiment, for example, the waist circumference 8 may be constructed from a microporous polymer membrane such as polyethylene or polypropylene.

[0063] In one embodiment, the waist circumference 8 may be a single layer of liquid-impermeable material, such as a polymer film. In one embodiment, the waist circumference 8 may be suitably stretchable at least in the transverse direction and more suitably elastic. In one embodiment, the waist circumference 8 may be stretchable in both the transverse and longitudinal directions and more suitably elastic. In one embodiment, the waist circumference 8 may be a multilayer laminate, wherein at least one layer is liquid-impermeable. In some embodiments, the waist circumference 8 may be a two-layer construction comprising an inner waist circumference 81 and an outer waist circumference 82 that can be bonded together, for example, by a laminate adhesive. Suitable laminate adhesives may be applied continuously or intermittently as beads, sprays, parallel vortices, etc., but it should be understood that the inner waist circumference 81 may be bonded to the outer waist circumference 82 by other bonding methods including, but not limited to, ultrasonic bonding, thermal bonding, pressure bonding, etc.

[0064] The outer waist circumference 82 of waist circumference 8 can be any suitable material, and can be a material that provides the wearer with a generally fabric-like texture or appearance. Another example of a suitable material for use as the outer waist circumference 82 of waist circumference 8 could be 20gsm spunbond polypropylene nonwoven mesh.

[0065] The liquid-impermeable inner waistband 81 of the waistband 8 (or the liquid-impermeable waistband 8, in which case the waistband 8 has a single-layer construction) can be vapor-permeable (i.e., "breathable") or vapor-impermeable. The liquid-impermeable inner waistband 81 (or the liquid-impermeable waistband 8 when the waistband 8 has a single-layer construction) can be made of a thin plastic film. The liquid-impermeable inner waistband 81 (or the liquid-impermeable waistband 8 when the waistband 8 has a single-layer construction) can prevent liquid bodily excretions from leaking from absorbent articles and wetting articles such as bed sheets and clothing, as well as the wearer and caregiver.

[0066] Absorption core

[0067] The top layer 4 and the bottom layer 7 can be joined together along their periphery to form a seal, thereby enclosing the absorbent core 6 between them and trapping bodily excretions that seep into it through the top layer. The absorbent core 6 is typically located primarily in the crotch area 3, but may also extend into the front waist area 1 at one end and into the rear waist area 2 at the other end.

[0068] The absorbent core 6 can be a composite material made of laminated liquid-absorbing raw materials, exhibiting a degree of stretchability and comfort, being non-irritating to the wearer's skin, and capable of absorbing and retaining bodily excretions. The absorbent core 6 can typically be any monolayer structure or combination of layered components, exhibiting a level 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 6 can be formed from a variety of different materials and can contain any number of desired layers. For example, in one embodiment, the absorbent core 6 may include a core support layer and an absorbent material layer. The absorbent material layer can be made of any suitable absorbent material, such as superabsorbent polymer (SAP). SAP refers to polymers that absorb and retain a very large amount of liquid relative to their own mass. Crosslinkable hydrogels, classified as hydrogels, absorb aqueous solutions through hydrogen bonds and other polar forces with water molecules. The absorbency of SAP is partly based on its ionicity (an index of the ion concentration in aqueous solutions) and the hydrophilic polar functional groups of SAP. SAP is generally manufactured by polymerizing acrylic acid mixed with sodium hydroxide in the presence of an initiator to form sodium polyacrylate (sometimes called sodium polyacrylate). Other materials can also be used to manufacture superabsorbent polymers, such as polyacrylamide copolymers, ethylene maleic anhydride copolymers, crosslinked carboxymethyl cellulose, polyvinyl alcohol copolymers, and starch-grafted copolymers of crosslinked polyethylene oxide and polyacrylonitrile. SAP can exist in absorbent articles in particulate or fibrous form.

[0069] In various embodiments, the absorber core 6 may also include, if desired, an optional amount of superabsorbent material. 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), polyvinyl 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, 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 absorber core 6 in any amount as needed.

[0070] In various embodiments, the absorbent core 6 may include one or more layers (e.g., two layers) of absorbent web material made of cellulose fibers (e.g., wood pulp fibers), other natural fibers, synthetic fibers, woven or nonwoven sheets, loosely woven webs, or other stabilizing structures, superabsorbent materials, adhesive materials, surfactants, selected hydrophobic and hydrophilic materials, pigments, detergents, odor control agents, and combinations thereof. In embodiments, the absorbent web material may include a cellulose fluff matrix and may also include superabsorbent materials. The cellulose fluff may include a mixture of wood pulp fluff.

[0071] In various embodiments, the absorbent core 6 may be a single-layer structure and may comprise a matrix, such as cellulose fluff and a superabsorbent material. In various embodiments, the absorbent core 6 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 6 may be composed of an air-laid material and the clothing-facing layer of the absorbent core 6 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.

[0072] Regardless of the combination of absorbent materials used in the absorbent core 6, the absorbent materials can be formed into a web structure using various conventional methods and techniques. For example, absorbent fiber webs 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. The methods and equipment used to implement these techniques are well known in the art.

[0073] The shape of the absorbent core 6 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 shape of the absorbent core 6 may generally correspond to the overall shape of the absorbent article. The size of the absorbent core 6 may be substantially similar to the size of the absorbent article; however, it should be understood that while the size of the absorbent core 6 may be similar, it is generally smaller than the size of the entire absorbent article in order to be fully contained therein.

[0074] For example, suitable materials and / or structures for the absorber core 6 may include, but are not limited to, those described in U.S. Patent No. 4,610,678 to Weisman et al., U.S. Patent No. 4,610,636 to Yahiaoui et al., U.S. Patent No. 6,610,903 to Latimer et al., U.S. Patent No. 7,358,282 to Krueger et al., and U.S. Publication No. 2010 / 017426 to Di Luccio et al., each of which is incorporated herein by reference in its entirety.

[0075] Flow zone, flow zone

[0076] In addition to the traditional top layer 4, bottom membrane 7, and absorbent core 6, other functional additional layers can be provided for the absorbent product, such as a support layer, a flow management layer, and a flow guiding layer. These functional additional layers can be arranged between the top layer 4 and the absorbent core 6, or between the absorbent core 6 and the bottom membrane 7, as needed. Figures 4 to 5 A flow-guiding layer 51 is shown between the top layer 4 and the absorbent core 6. The flow-guiding layer 51 facilitates the rapid guidance of bodily waste, especially liquids, absorbed by the top layer 4 to the absorbent core 6, distributing the waste throughout the entire absorbent core layer to maximize its utilization and prevent localized accumulation that could reduce absorption capacity. Before being absorbed by the absorbent core layer, the flow-guiding layer 51 can also function as an intermediate storage layer and as a barrier against backflow. The transverse width of the flow-guiding layer 51 is less than the transverse width of the top layer 4. In one example, the transverse width of the flow-guiding layer 51 is substantially the same as the transverse width of the middle portion of the top layer 4. Furthermore, the flow-guiding layer 51 can be constructed with structures that aid in guiding bodily waste, such as aligning it with openings in the absorbent core 6. Fiber nonwovens such as spunbond webs, meltblown webs, carded webs such as air-laid webs, bonded carded webs, and co-forming materials are suitable for manufacturing the flow-guiding layer 51. Alternatively, foam materials and loosely woven fabrics are also well-suited. Additionally, the flow-guiding layer 51 can be a multi-layered structure.

[0077] In various embodiments, the absorbent article may include a flow layer 52 located between the absorbent core 6 and the top layer 4. The flow layer 52 may be adapted to absorb bodily excretions together with the absorbent core 6. In various embodiments, the flow layer 52 may have a high pore volume, allowing the absorbent core 6 to rapidly draw in and retain bodily excretions, thus giving the absorbent core 6 time to absorb bodily excretions without leakage from the absorbent article. The flow layer 52 may be of any size and shape as needed and deemed appropriate.

[0078] Elastic zone, elastic material

[0079] To ensure the absorbent material conforms to the groin area of ​​the human body, the absorbent material of this invention may include a second elastic region 21 located in the lower back region 2, which is spaced longitudinally behind the first elastic region 31 in the crotch area 3. For example... Figures 1 to 3 A second elastic region 21 is shown formed in the transverse middle of the rear waist region 2 of the absorbent article.

[0080] Reference Figures 1 to 3 In one embodiment, the outer contour of the second elastic region 21 is generally rectangular. In another embodiment, the outer contour of the second elastic region 21 may be generally trapezoidal, and the upper base of the trapezoid may be located in front of the lower base in the longitudinal direction, i.e., above, as shown in the figure. It is understood that the second elastic region 21 can have any outer contour shape.

[0081] Furthermore, in one implementation, such as Figure 1 As shown, the second elastic region 21 has a plurality of elastic materials 211 arranged at lateral intervals, wherein the elastic materials 211 extend longitudinally. In another embodiment, as... Figures 2 to 3 As shown, the second elastic region 21 has a plurality of elastic materials 211 arranged longitudinally at intervals, wherein the elastic materials 211 extend laterally.

[0082] In various embodiments, such as in Figures 1 to 5 As shown, the elastic material 211 in the absorbent article can be elastic material strands. The elastic strands can have circular, semi-circular, square, rectangular, elliptical, or other geometric configurations. In a preferred embodiment, the second elastic region 21 can have 4 to 300 of the elastic strands, and the center-to-center distance between two adjacent elastic strands can be 1 mm to 50 mm. In a further preferred embodiment, the second elastic region 21 can have 10 to 250 of the elastic strands, and the center-to-center distance between two adjacent elastic strands is 3 mm to 45 mm.

[0083] The elastic material 211 arranged in the absorbent article is advantageously designed for comfort and fit, and serves to prevent leakage. The elastic material 211 can be disposed online or offline between any two adjacent layers in the thickness direction of the absorbent article, for example... Figure 4 The absorber core 6 and the base film 7 are shown. In other embodiments, such as... Figure 5 As shown, the elastic material 211 can also be disposed between the inner waist circumference 81 and the outer waist circumference 82. The tensile strength of the elastic material 211 can be 0.9-2 cN / dtex; the elongation at break can be 500%-800%; the fineness can be 40-1200 dtex; and the elastic modulus can be 0.01-1 N / m. 2The elastic recovery rate can be: 95-99% when the elongation of the elastic material is ≤400%; and 100% when the elongation of the elastic material is ≤200%.

[0084] Furthermore, the elastic material 211 can be one or more of spandex filaments, elastic nonwoven fabrics, polyester films, and elastic composite materials. The specifications of spandex filaments can range from, for example, 50D to 1000D. The basis weight range of elastic nonwoven fabrics can range from, for example, 10gsm to 300gsm. The basis weight range of polyester films can range from 10gsm to 100gsm. The basis weight range of elastic composite materials can range from 10gsm to 300gsm.

[0085] In various embodiments, the elastic material 211 in the absorbent article may be an elastic polymer film layer. In various embodiments, a suitable elastic polymer film layer may be a stretch-bonded laminate (SBL), in which the elastic core or intermediate layer is stretched before being bonded to two opposing outer nonwoven web layers. Another suitable material for an elastic polymer film layer is a necking-bonded laminate (NBL). NBL materials are three-layer laminates, but the elastic core or intermediate layer is not pre-stretched before being attached to the two outer nonwoven web layers. Instead, the opposing outer nonwoven web layers are necked-stretched before the elastic core or intermediate layer is bonded to them. Other examples of such elastic materials that can be used as elastic polymer film layers include continuous filament stretch-bonded laminates (CFSBL), vertical filament laminates (VFL), necking-stretch-bonded laminates (NSBL), or necking-heat laminates (NTL). Combinations of these materials may also be used. Such materials are described in U.S. Patents 4,720,415 to Vander Wielen et al., 5,366,793 to Fitts et al., 5,385,775 to Wright, 6,969,441 to Welch et al., 6,978,486 to Zhou et al., 7,803,244 to Siqueira et al., and 5,226,992 to Morman et al., each of which is incorporated herein by reference in its entirety. The elastic laminates just described will generally comprise an elastic layer and at least one surface-bonded nonwoven web layer, such as meltblown, spunbond, or air-permeable bonded webs.

[0086] When fixing the elastic material 211 between two adjacent layers, an adhesive can be applied to the surface of the elastic material 211, and then the elastic material 211 can be placed on the lower layer of the two layers, and then the upper layer can be used to cover the elastic material 211 and the lower layer. Alternatively, the adhesive can be applied to either of the two adjacent layers, and then the elastic material 211 and the other layer can be placed. Of course, it is also possible to bond the elastic material 211 to only one of the two adjacent layers (for example, to the lower layer of the two adjacent layers), and leave the elastic material 211 unbonded to the other layer of the two layers.

[0087] The length of the elastic material 211 can be set as needed, ranging from 1% to 100% of the entire longitudinal length of the absorbent article, for example, 60%, 70%, 80%, or 90%. After the elastic material 211 is bonded to at least one of the upper and lower layers with an adhesive, the shrinkage of the elastic material 211 at the location of the adhesive will cause the bonded layer to shrink together, thereby forming an effective elastic region. If the elastic material is bonded to at least one of the upper and lower layers in an intermittent manner, that is, by intermittently applying adhesive, so that one or more spaced segments of the elastic material 211 are bonded to at least one of the upper and lower layers, while other segments can shrink freely relative to the layer, then a second elastic region 21 is formed at the location of the one or more bonded segments of the elastic material 211. The second elastic region 21 can occupy 1% to 100% of the entire longitudinal length of the absorbent article, for example, 60%. The longitudinal dimension of the second elastic region 21 from the starting end near the front edge of the absorbent article to the rear edge of the absorbent article can be 1% to 100% of the entire longitudinal dimension of the absorbent article, for example, 50%, 60%, or 70%.

[0088] As described above, the elastic material 211 is sandwiched between any two suitable adjacent layers of the absorbent article, and another layer adjacent to these two layers, such as the next adjacent layer, can be bonded to these two layers by intermittent application of adhesive. The locations where adhesive is present form bonded areas, while the locations where no adhesive is present form unbonded areas. In the scheme of this disclosure, the unbonded areas correspond to the elastic areas above them, so that when the elastic areas naturally retract, the unbonded areas freely arch upwards, forming a curved configuration that conforms to the body's curves, effectively improving the product's leak-proof capability and providing good breathability. Advantageously, the area of ​​the unbonded areas is larger than the area of ​​the elastic areas. For example, the longitudinal length of the unbonded areas is 1.01-10 times the longitudinal length of the elastic areas, and the transverse width of the unbonded areas is 1.01-10 times the transverse width of the elastic areas.

[0089] 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.

[0090] 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. A disposable absorbent garment in the form of shorts, having a longitudinal and a transverse direction perpendicular to each other, and a thickness direction perpendicular to said longitudinal and transverse directions, said absorbent garment being divided along said longitudinal direction into a front waist area (1), a back waist area (2) and a crotch area (3), said crotch area (3) being connected between said front waist area (1) and said back waist area (2) and having a first elastic area (31) for conforming to the crotch of the wearer, said absorbent garment comprising along said thickness direction: The top layer (4) that is permeable to liquid is positioned to face the wearer's body; An impermeable bottom membrane (7) is disposed opposite to the top layer (4) along the thickness direction and arranged to face the wearer as clothing; Absorbent core (6) is sandwiched between the top layer (4) and the bottom film (7) and extends longitudinally in the crotch area (3); The characteristic feature is that the lower back area (2) has a second elastic area (21) corresponding to the groin area of ​​the wearer. The second elastic area (21) is arranged at intervals behind the first elastic area (31) in the longitudinal direction. The second elastic area (21) contains an elastic material (211). After the elastic material (211) retracts, the absorbent product fits the groin area of ​​the wearer.

2. The disposable absorbent article according to claim 1, characterized in that, The elastic material (211) is arranged along the longitudinal direction or along the transverse direction within the second elastic region (21).

3. The disposable absorbent article according to claim 2, characterized in that, The elastic material (211) is an elastic strand, and the second elastic region (21) has 4 to 300 elastic strands, with the center distance between two adjacent elastic strands being 1 mm to 50 mm.

4. The disposable absorbent article according to claim 1, characterized in that, The elastic material (211) has a tensile strength of 0.9-2 cN / dtex; an elongation at break of 500%-800%; a fineness of 40-1200 dtex; and an elastic modulus of 0.01-1 N / m. 2 The elastic recovery rate is as follows: when the elongation of the elastic material is ≤400%, the recovery rate is 95-99%; when the elongation of the elastic material is ≤200%, the recovery rate is 100%.

5. The disposable absorbent article according to claim 1, characterized in that, The elastic material (211) is one or more of spandex filaments, polymer films, elastic nonwoven fabrics, and elastic composite materials.

6. The disposable absorbent article according to claim 1, characterized in that, The second elastic zone (21) is located between any two adjacent layers of the absorbent article in the thickness direction.

7. The disposable absorbent article according to claim 6, characterized in that, The absorbent article further includes a waist (8) located on the side of the bottom film (7) away from the absorbent core (6) in the thickness direction. The waist (8) includes an inner waist (81) and an outer waist (82) from the inside to the outside in the thickness direction. The second elastic zone (21) is located between the absorbent core (6) and the bottom film (7), or the second elastic zone (21) is located between the inner waist (81) and the outer waist (82).

8. The disposable absorbent article according to claim 1, characterized in that, The second elastic zone (21) is arranged symmetrically about the longitudinal centerline of the absorbent article.

9. The disposable absorbent article according to claim 8, characterized in that, The outer contour of the second elastic zone (21) is generally rectangular.

10. The disposable absorbent article according to claim 8, characterized in that, The outer contour of the second elastic zone (21) is generally trapezoidal, with the upper base of the trapezoid located in front of the lower base in the longitudinal direction.

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