Lateral leakage prevention disposable absorption product

Abstract

The utility model relates to a disposable absorption product capable of preventing side leakage. The absorption product has a longitudinal direction and a transverse direction which are perpendicular to each other, is divided into a front area, a rear area and a crotch area connected between the front area and the rear area in the longitudinal direction, and comprises a liquid-permeable surface layer and a liquid-permeable surface layer, and the liquid-permeable surface layer is constructed to face the body of a wearer; the liquid-tight back layer is arranged opposite to the surface layer and is used for facing clothes of a wearer; the absorbing core body is positioned between the surface layer and the back layer; the pair of three-dimensional guards are arranged on the two opposite sides of the absorption product in the transverse direction, each three-dimensional guard extends from the front area to the rear area in the longitudinal direction and comprises a water-repellent layer, a water-repellent layer and a water-repellent layer, the water-repellent layer covers the back layer on the side portion and is connected with the back layer, and the water-repellent layer covers the back layer on the side portion and is connected with the back layer. The absorption layer is arranged on the side, facing the surface layer, of the water repellent layer; the elastic piece extends in the water repellent layer in the longitudinal direction.

Description

Technical Field

[0001] The utility model relates to a disposable personal care absorbent product, in particular to a side leakage-proof disposable absorbent product. Background Art

[0002] Currently, there are disposable absorbent products designed to absorb bodily exudates in a pant-like configuration, such as diapers and training pants. Absorbency, comfort, and fit are three key product attributes and are of particular concern to consumers. Consumers are generally interested in whether these products can absorb large amounts of bodily exudates without leaking, potentially soiling clothing or bedsheets, and without sacrificing comfort.

[0003] Known shorts-type absorbent articles typically include a liquid-permeable topsheet layer positioned to face the body, a liquid-impermeable backsheet layer positioned to face the clothing, and an absorbent core sandwiched between the topsheet and the backsheet layers. The edges of the topsheet and backsheet layers can be bonded together at their peripheries to form a seal, thereby wrapping the absorbent core and intercepting body exudates that penetrate through the topsheet. Researchers have found that such absorbent products cannot fully absorb body exudates for a variety of reasons, resulting in uncontrolled outflow of body exudates from both sides of the topsheet and subsequent side leakage. These reasons include: the wearer remaining in a side-lying position for a long time, a large amount of body exudates rushing towards the topsheet in a short period of time, and chemical treatment of the topsheet specifically to reduce the wet and sticky feel of the topsheet, resulting in insufficient ability of the topsheet to quickly and widely divert body exudates to the internal absorbent core, etc.

[0004] To combat this side leakage, manufacturers of absorbent products typically incorporate additional side barrier structures to provide fluid leakage protection. Such leakage protection is designed to prevent body exudates such as urine, feces, or menstruation from overflowing or penetrating the lateral side edges of the product and contaminating the wearer's underwear, outer clothing, or bedding.

[0005] For example, Chinese patent publication number CN220572319U discloses a side leakage prevention sanitary product in which three-dimensional guardrails are provided on both sides of the surface layer, extending above the surface layer. The bottom layer extends beyond the absorbent layer in the width direction, and the portion of the bottom layer extending beyond the absorbent layer is folded upward to form a leakage prevention portion, which is bonded to the three-dimensional guardrails. This side leakage prevention sanitary product has a certain side leakage prevention function, but it still cannot completely prevent side leakage in situations such as sudden large amounts of body discharge, resulting in side leakage.

[0006] Therefore, in this field, there is a need for further optimization of the anti-leakage structure of absorbent products. It is expected that the optimized anti-leakage structure of the absorbent products can meet at least one of the following properties: long-lasting conformability acceptable to the skin, high extensibility and smooth and uniform texture, and rapid absorption and drainage capabilities for instantaneous large amounts of body excretions, especially liquids. Utility Model Content

[0007] The utility model aims to provide a side leakage-proof disposable absorbent product, which at least partially overcomes the above-mentioned shortcomings of the prior art.

[0008] According to one aspect of the present invention, a side leakage-proof disposable absorbent product is provided, which has a longitudinal and lateral direction perpendicular to each other, and is divided into a front area, a back area and a crotch area connected between the front area and the back area along the longitudinal direction. The absorbent product comprises: a liquid-permeable surface layer, which is constructed to face the wearer's body; a liquid-impermeable back layer, which is arranged opposite to the surface layer and is constructed to face the wearer's clothing; an absorbent core, which is located between the surface layer and the back layer; a pair of three-dimensional guards, which are arranged on opposite sides of the absorbent product along the transverse direction, wherein each three-dimensional guard extends from the front area to the back area along the longitudinal direction and comprises: a water-repellent layer, which covers the back layer at the side and is connected to the back layer; an absorbent layer, which is arranged on the side of the water-repellent layer facing the surface layer; and an elastic member, which extends longitudinally in the water-repellent layer.

[0009] The disposable absorbent product provided by this solution, with the help of the combined design of the water-repellent layer and the absorbent layer in the three-dimensional guardrail, builds a dam to prevent side leakage on both sides of the absorbent core, enhances the function of absorbing body excretions on both sides of the absorbent core or on both sides of the core, thereby increasing the rapid absorption function of the absorbent core and improving the anti-leakage effect. Particularly advantageously, when facing infants and young children, the combined design of the water-repellent layer and the absorbent layer can effectively deal with a large amount of body excretions in an instant, quickly absorb these body excretions and guide them to the absorbent core, preventing them from penetrating or overflowing the three-dimensional guardrail to infect the wearer's clothing or bedding. The elastic member applied to the water-repellent layer can provide the conformable fit of the three-dimensional guardrail, while not producing pressure marks on the skin of infants and young children, improving skin condition. These product performances have greatly improved the competitiveness of the product.

[0010] In some embodiments, the absorbent article further comprises a support layer located between the surface layer and the absorbent core, and the absorbent layer of the three-dimensional guard is sandwiched between the support layer and the water-repellent layer.

[0011] In some embodiments, the lateral width of the support layer is greater than the lateral width of the surface layer.

[0012] In some embodiments, there is a gap between a pair of three-dimensional guards on opposite sides of the absorbent article, and the lateral width of the absorbent core is greater than the gap, so that the absorbent core partially overlaps with the water-repellent layer of the pair of three-dimensional guards.

[0013] In some embodiments, the absorbent core is spaced apart from the absorbent layers on laterally opposite sides thereof.

[0014] In some embodiments, the first end of the water-repellent layer is connected to the surface of the back layer facing the surface layer, and the second end of the water-repellent layer opposite to the first end is connected to the surface of the back layer facing away from the surface layer, forming a longitudinal channel between the first end and the second end of the water-repellent layer, and the elastic member is arranged in the longitudinal channel.

[0015] In some embodiments, at least one of the first end and the second end of the water-repellent layer is connected to the backing layer by means of a hot melt pressure-sensitive adhesive or ultrasound.

[0016] In some embodiments, the first end and the second end of the water repellent layer are aligned.

[0017] In some embodiments, in a naturally laid-flat state, the distance between the transversely outermost edges of a pair of three-dimensional guards defines the maximum transverse width of the absorbent article.

[0018] In some embodiments, the absorbent layer has a thickness less than or equal to 3 mm and a grammage less than or equal to 200 gsm.

[0019] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 1 is a schematic diagram of a disposable absorbent article naturally laid flat according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of a disposable absorbent product according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1-absorbent article; X-longitudinal direction; Y-transverse direction; Z-thickness direction; 21-surface layer; 22-support layer;

[0025] 23-back layer; 3-front area; 31-front side edge; 32-front edge; 33-front waist elastic material;

[0026] 4-crotch area; 41-crotch side edge; 42-leg elastic material; 5-back area;

[0027] 51- rear side edge; 52- rear end edge; 53- rear waist elastic material; 6- side panel;

[0028] 7-absorbent core; 8-three-dimensional protective enclosure; 81-absorbent layer; 82-water-repellent layer; 821-first end;

[0029] 822 - second end; 823 - longitudinal channel; 83 - elastic member; 9 - hot melt adhesive DETAILED DESCRIPTION

[0030] With reference to the accompanying drawings, schematic diagrams of the side leakage-preventing disposable absorbent article disclosed in the present invention are described in detail. While the drawings are provided to illustrate some embodiments of the present invention, they are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut away to better illustrate and explain the disclosure of the present invention. Some components in the drawings may be repositioned as needed 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 following description of the drawings, such as "inner," "outer," "above," "below," and other directional terms, should be understood to have their normal meanings and refer to those directions when the drawings are normally viewed. Unless otherwise indicated, the directional terms used in this specification are generally in accordance with 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] Definition of terms

[0034] "Disposable," with respect to absorbent articles, means absorbent articles that are not generally intended to be laundered or otherwise restored or reused as absorbent articles (i.e., they are intended to be discarded after a single use and preferably can be recycled, composted, or otherwise disposed of in an environmentally compatible manner).

[0035] "Absorbent article" or "absorbent garment" as used herein refers to an article that can be placed against or in proximity to the wearer's body (i.e., adjacent to the body) to absorb and contain various liquid, solid, and semi-solid exudates discharged from the body. Such absorbent articles, as described herein, are intended to be discarded after a limited period of use rather than being laundered or otherwise restored for reuse. It should be understood that the present disclosure is applicable to a variety of disposable absorbent articles, including but not limited to diapers, training pants, swim pants, incontinence products, absorbent feminine care products, etc., without departing from the scope of the present disclosure.

[0036] As used herein, the term "nonwoven" or "nonwoven" generally refers to a web having a structure of individual fibers or yarns that is a laminate, but not in an identifiable manner such 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, airlaid webs, coform webs, hydroentangled webs, and the like.

[0037] As used herein, the term "meltblown web" generally refers to a nonwoven web produced by a process in which a molten thermoplastic material is extruded as molten fibers through a plurality of fine, usually circular, die capillaries into a converging high-velocity gas (e.g., air) stream, which attenuates the fibers of the molten thermoplastic material to reduce their diameter. The meltblown fibers are then conveyed by the high-velocity gas stream and deposited onto a collecting surface to form a web of randomly distributed meltblown fibers. Generally, meltblown fibers can be continuous or discontinuous microfibers, typically less than 10 microns in diameter, and are typically tacky when deposited onto a collecting surface.

[0038] As used herein, the term "spunbond web" generally refers to a web comprising substantially continuous fibers of small diameter. The fibers are produced by extruding a molten thermoplastic material through a plurality of fine, usually circular, spinneret capillaries. The diameter of the extruded fibers is then rapidly reduced by, for example, draw-off drafting and / or other known spunbonding mechanisms. "Proximal" and "distal" refer to the relative position of an element to the longitudinal or lateral centerline of the structure, respectively (e.g., with respect to the same longitudinal axis, the proximal edge of a longitudinally extending element is located closer to the longitudinal axis than the distal edge of the same element).

[0039] "Body-facing" and "garment-facing" refer to the relative position of an element or the relative position of a surface of an element or group of elements, respectively. "Body-facing" means that the element or surface is closer to the wearer during wear than some other elements or surfaces. "Garment-facing" means that the element or surface is farther from the wearer during wear than some other elements or surfaces (i.e., the element or surface is closer to the wearer's clothing, which may be worn over a disposable absorbent article).

[0040] As used herein, the terms "extensible" or "extensibility" generally refer to the dimensional extensibility of a material in the direction of applied force, such as the ability to extend the dimension in the direction of applied force by at least about 25%, or at least about 50%, or at least about 75% compared to the dimension in the naturally relaxed state. Extensible materials do not necessarily have recovery properties or significant recovery. For example, elastic materials are extensible materials with recovery properties. Meltblown webs can be extensible, but their recovery properties are significantly reduced compared to their extensibility, or they may even have no recovery, and are therefore extensible, non-elastic materials.

[0041] As used herein, the term "elastomeric" or "elastic" generally refers to a material that is stretched in at least one direction (e.g., the machine direction) by application of a stretching force and that contracts / recovers to approximately its original dimensions by release of the stretching force. For example, a stretched material can have a stretched length that is at least about 50% greater than its relaxed, unstretched length and, by release of the stretching force, can recover to a length within at least 50% of its stretched length.

[0042] As used herein, the term "elastic strand" includes an elastic elongated material, such as but not limited to elastic rubber, elastic yarn, elastic ribbon, elastic fiber nonwoven sheet, etc. The elastic rubber, for example, can be made of spandex in a warp beam manner according to a spinning process.

[0043] As used herein, the term "bonded" refers to the joining, adhering, connecting, attaching, etc. of two elements. Two elements will be considered to be joined together when they are joined, adhered, connected, attached, etc. directly to each other or indirectly to each other, such as when bonded to an intermediate element. Bonding can be performed, for example, via adhesives, pressure bonds, heat bonds, ultrasonic bonds, splicing, sewing, and / or welding.

[0044] As used herein, the term "ultrasonic welding" refers to a process performed, for example, by passing the material through a slit between an ultrasonic generator and a support roll.

[0045] Disposable absorbent products

[0046] The present disclosure relates to a disposable absorbent article, which may particularly be a disposable pant-type absorbent article. This disposable absorbent article comprises a three-dimensional protective enclosure structure comprising a stacked absorbent layer and a water-repellent layer. The absorbent layers are arranged on opposite sides of an absorbent core, thereby forming a dam to prevent side leakage on opposite lateral sides of the absorbent article. This dam can quickly absorb and guide large amounts of body exudates flowing in a transient manner in a lateral direction, providing improved side leakage prevention and greater comfort for the wearer. Furthermore, the disposable absorbent article of the present disclosure is particularly adaptable to existing absorbent article production processes and has good economic benefits.

[0047] Figure 1 A disposable absorbent article 1 (hereinafter referred to as "absorbent article") according to the present disclosure is shown as an example. The absorbent article 1 may be a pant-type personal care product (e.g., a diaper). It should be understood that the technical solutions of the present disclosure are applicable to absorbent articles for personal care, including but not limited to diapers, training pants, pull-on pants, and feminine hygiene products, without departing from the scope of the present disclosure.

[0048] like Figure 1 As shown, the absorbent article 1 is shown in a flat configuration and in a naturally relaxed state without being elastically deformed or wrinkled by external forces. The absorbent article 1 has a transverse direction Y and a longitudinal direction X perpendicular to each other, and a thickness direction Z perpendicular to the XY plane (shown in FIG. Figure 2 For clarity, Figure 1 The longitudinal center line X1 is marked in FIG. Along the longitudinal direction X, the absorbent article 1 can be divided into a front region 3, a crotch region 4 and a back region 5, wherein the crotch region 4 is connected between the front region 3 and the back region 5.

[0049] The absorbent article 1 is intended to be worn around the lower torso of a wearer (e.g., an infant). In this position, the front region 3 generally covers the area of ​​the wearer's ventral waistline, the back region 5 generally covers the area of ​​the wearer's dorsal waistline, and the crotch region 4 is positioned between the wearer's legs. The front region 3 has front side edges 31 on opposite sides in the transverse direction, and a front end edge 32 extending between the two front side edges 31 along the transverse direction Y. The back region 5 has rear side edges 51 on opposite sides in the transverse direction, and a rear end edge 52 extending between the two rear side edges 51 along the transverse direction Y. The crotch region 4 has crotch side edges 41 on opposite sides in the transverse direction. The front edge 32 and the rear end edge 52 substantially define the two ends of the absorbent article 1 in the longitudinal direction X.

[0050] The single-piece personal care absorbent article 1 needs to be bent in the crotch region 4 to join the front region 3 and the back region 5 near the front side edge 31 and the back side edge 51, thereby forming a wearable shorts configuration. In this configuration, the front edge 32 and the back side edge 52 together enclose a waist opening that accommodates the wearer's torso, while the two crotch side edges 41 of the crotch region 4 each enclose a leg opening that accommodates the wearer's thighs. To ensure a snug fit at the waist and prevent the absorbent article 1 from falling off, a front waist elastic material 33 may be arranged along the front region 3 near the front edge 32. This front waist elastic material 33 extends laterally from one front side edge 31 to the other front side edge 31. Similar to the front waist elastic material 33, a back waist elastic material 53 may also be arranged in the back region 5 near the back side edge 52, extending between the two back side edges 51. In addition, a leg elastic material 42 may be arranged along the crotch side edges 41. These elastic materials help to provide additional elastic support around the waist opening and around the leg openings to enhance the fit of the absorbent article 1 and provide leakage protection.

[0051] For the purpose of being convenient to engaging front zone 3 and back zone 5, can be provided with side piece 6 at the horizontal relative two sides of back zone 5, and each side piece 6 extends beyond corresponding rear side edge 51.Between side piece 6 and front zone 3, connecting structure can be set to realize detachably connecting.Reliable connecting structure such as hook and loop fastener or magic tape.A part (such as a large amount of micro hooks) of hook and loop fastener can be arranged on side piece 6, and in another part (such as a large amount of micro loops) of hook and loop fastener corresponding to front zone 3.Another kind of detachable connecting structure for example is the adhesive tape that is coated on side piece 6 and front zone 3 at least one.Certainly, in other not shown embodiments, absorbent article 1 can not be provided with side piece.

[0052] In order to allow the absorbent article 1 to fully absorb the wearer's body exudates, the absorbent article 1 is provided with an absorbent core 7 in the crotch region 4. Here, the absorbent core 7 can extend into the front region 3 at one end and into the back region 5 at the other end. The absorbent core 7 can be a composite material made of layered liquid-absorbent raw materials, which can exhibit a certain degree of stretchability and comfort, is non-irritating to the wearer's skin, and can absorb and retain body exudates. The absorbent core 7 can be made of any suitable material and can include any desired number of layers. For example, in one embodiment, the layers of the absorbent core 7 can include an outermost top layer and a bottom layer, with a core support layer and an absorbent material layer arranged therebetween. The top layer and bottom layer can be made of the same material, or the top layer and bottom layer can be constructed to have different absorption properties. For example, the top layer and bottom layer can both be made of liquid-permeable nonwoven sheets. The core support layer can be made of, for example, a hot air nonwoven sheet and can be a single-layer or multi-layer laminate structure. The absorbent material layer can be made of any suitable absorbent material, such as superabsorbent polymer (SAP). SAP should refer to polymers that absorb and retain very large amounts of liquid relative to their own mass. The cross-linked water-absorbing polymers classified as hydrogels absorb aqueous solutions by hydrogen bonds and other polar forces with water molecules. The water absorption capacity of SAP is partly based on ionicity (index of aqueous solution ion concentration) and the polar functional groups of SAP with water affinity. SAP is generally manufactured by polymerization of acrylic acid mixed with sodium hydroxide in the presence of an initiator to form polyacrylic acid sodium salt (sometimes referred to as sodium polyacrylate). Other materials also can be used to make superabsorbent polymers, such as polyacrylamide copolymers, ethylene maleic anhydride copolymers, cross-linked carboxymethyl cellulose, polyvinyl alcohol copolymers, cross-linked polyethylene oxide and polyacrylonitrile starch graft copolymers. SAP can be present in absorbent articles in the form of particles or fibers.

[0053] Figure 2 The schematic cross-section of the absorbent article 1 is shown perpendicular to the XY plane, or in other words, viewed through the thickness direction. As shown in the figure, along the thickness direction Z, the absorbent article 1 includes a top layer 21 and a back layer 23, which are positioned in a vertically opposed relationship. The absorbent core 7, as previously described, is positioned between the top layer 21 and the back layer 23.

[0054] The top layer 21 can be a single layer or multi-layer laminate, which defines a surface that directly contacts the wearer's skin and is hydrophilic to receive body exudates and guide them to the absorbent core 7. The top layer 21 preferably retains almost no liquid in its structure, thereby providing a relatively comfortable and non-irritating touch while being close to the wearer's skin. In various embodiments, the top layer 21 can be a single layer structure or a multi-layer composite structure, and the multi-layer composite structure itself can include similar or different materials. The top layer 21 can be constructed from various nonwoven webs such as meltblown webs, spunbond webs, spunlace webs, or air-through bonded carded webs. Examples of suitable top layer materials can include, but are not limited to, natural fiber webs (such as cotton), rayon, spunlace webs, polyester, polypropylene, polyethylene, nylon or other heat-bondable fibers (such as bicomponent fibers), polyolefins, copolymers of polypropylene and polyethylene, linear low-density polyethylene and aliphatic esters (such as polylactic acid). Finely perforated films and mesh materials can also be used, as can laminates of these materials or combinations thereof. It is particularly advantageous that the surface layer 21 is constructed as a three-dimensional surface layer with a three-dimensional texture, for example, the surface layer 21 is made of a three-dimensional composite material including a plurality of convex points and a plurality of concave points arranged alternately.

[0055] Backsheet 23 is normally impermeable to liquid and is the part of absorbent article 1 facing the wearer's clothing. Backsheet 23 can be constructed to allow gas to overflow from absorbent article 1, but stops liquid from flowing through. Any liquid-impermeable material can be used to form backsheet 23 usually. The liquid-impermeable backsheet can be made of a single layer or multiple layers, and this single layer or multiple layers itself can comprise similar or different materials. Suitable materials that can be used can be microporous polymer films, such as polyolefin films, nonwovens and nonwoven laminates and film / nonwoven laminates of polyethylene or polypropylene. The specific structure and composition of backsheet layer can be selected from various known films and / or fabrics, and specific material is suitably selected to provide the liquid barrier, strength, wear resistance, tactile properties, aesthetic properties etc. of desired level.

[0056] In addition to the conventional surface layer 21, back layer 23 and absorbent core 7, the absorbent article 1 may be provided with a support layer 22, which is located between the absorbent core 7 and the surface layer 21. Figure 2As shown, the support layer 22 extends across nearly the entire width of the absorbent article 1 in the transverse direction and nearly the entire length of the absorbent article 1 in the longitudinal direction, thereby allowing the support layer 22 to span nearly the entire surface of the absorbent article 1. The topsheet 21 is attached to the upper surface of the support layer 22, so that the two together form the upper surface of the absorbent article 1. It may generally be advantageous for the support layer 22 to be a fluid-permeable layer having good wet and dry strength, capable of absorbing body exudates, and retaining them for a specific period before releasing them to one or more underlying layers, such as a fluid management layer, a surge layer, or the absorbent core 7. In this regard, fibrous nonwovens such as spunbond webs, meltblown webs, carded webs such as airlaid webs, bonded carded webs, and coform materials are suitable as the support layer 22. Alternatively, foam materials and scrim materials are also very suitable. In addition, the support layer 22 may be a multilayer material.

[0057] Three-dimensional guards 8 are further arranged on opposite transverse sides of the absorbent article 1. The three-dimensional guards 8 are advantageously designed for comfort and fit, and have the function of absorbing body exudates through their own structure and guiding the body exudates toward the absorbent core 7.

[0058] Specific as Figure 1 and Figure 2 As shown, the three-dimensional guardrail 8 extends longitudinally from the front area 3 through the crotch area 4 and to the back area 5, and its two ends can be aligned with the front edge 32 and the rear edge 52, or can be retracted a certain distance inward relative to the front edge 32 and the rear edge 52. The three-dimensional guardrail 8 is bonded to the lateral side of the back layer 23, and includes a water-repellent layer 82 and an absorbent layer 81. The water-repellent layer 82 is a whole piece of continuously extending sheet material, including a first end 821 and a second end 822 opposite to each other, wherein the first end 821 is bonded to the surface of the back layer 23 facing the absorbent core 7, and the second end 822 is bonded to the surface of the back layer 23 facing away from the absorbent core 7, so that the three-dimensional guardrail 8 wraps the lateral side edge of the back layer 23. The water-repellent layer 82 can be bonded to the back layer 23 by any suitable means, such as hot melt pressure-sensitive adhesive or ultrasonic welding, Figure 2 The hot melt adhesive 9 is shown. The hot melt adhesive 9 can be applied continuously between the water repellent layer 82 and the backing layer 23 to form a certain continuous bonding area. Alternatively, the hot melt adhesive 9 can be applied intermittently on one of the backing layer 23 and the water repellent layer 82, thereby reducing the stiffness of the junction between the two. From the thickness direction Z, the first end 821 and the second end 822 of the water repellent layer 82 can be aligned, as shown in FIG. Figure 2 Alternatively, in other embodiments not shown, the first end 821 and the second end 822 of the water-repellent layer 82 may be staggered.

[0059] The central portion of the water-repellent layer 82 between the first end 821 and the second end 822 is bent, and the bent portion is not bonded to the side edge of the backing layer 23. Thus, the central bent portion of the water-repellent layer 82 constructs a longitudinal channel 823 to accommodate the elastic member 83 of the three-dimensional guardrail 8. The elastic member 83 helps to provide additional elastic support in the three-dimensional guardrail 8 to increase the fit and leakage protection of the three-dimensional guardrail 8. Each elastic member 83 may include a single elastic band, strand or thread, etc., or each elastic member 83 may include two, three or more elastic bands, strands or threads, etc. A plurality of elastic members 83 can be accommodated in the longitudinal channel 823, each of which extends in the longitudinal direction X. These elastic members 83 can be arranged in the transverse direction in the longitudinal channel. Advantageously, the elastic member 83 is bonded to the side of the backing layer 23 surrounded by the longitudinal channel 823 by, for example, hot melt pressure-sensitive adhesive or ultrasonic welding, thereby preventing the elastic member 83 from rolling freely in the longitudinal channel 823. The elastic member 83 is positioned relatively close to the central curved portion of the water-repellent layer 82 and relatively far from the junction between the water-repellent layer 82 and the backing layer 23 (the location of the hot-melt adhesive 9). The water-repellent layer 82 can be made of any suitable liquid-impermeable material. Suitable materials that can be used can be membrane materials, such as microporous polymer films, polyolefin films such as polyethylene or polypropylene, nonwovens and nonwoven laminates, and membrane / nonwoven laminates. In a naturally laid-flat state, the water-repellent layers 82 on both sides roughly outline the outermost edges of the absorbent article 1 at the top sides of their respective curved portions.

[0060] The absorbent layer 81 is sandwiched between the water-repellent layer 82 and the support layer 22 and bonded to the water-repellent layer 82. Figure 2As shown, the width of the support layer 22 extending in the lateral direction is significantly greater than the width of the surface layer 21 extending in the lateral direction, so that the surface layer 21 can basically only cover the absorbent core 7, but not the absorbent layer 81, and the support layer 22 basically completely covers the absorbent core 7 and the absorbent layers 81 on both sides. In other words, the surface layer 21 can be non-overlapping with the absorbent layer 81 in the thickness direction Z. In this way, when the three-dimensional guardrail 8 is supported and in contact with the wearer's skin when worn, it has no mutual influence with the surface layer 21. The absorbent core 7 and the absorbent layer 81 are sandwiched between the support layer 22 and the water-repellent layer 82, wherein the lateral dimension of the absorbent core 7 extends beyond the interval between the water-repellent layers 82 of the three-dimensional guardrail 8 on both sides, so that the opposite lateral sides of the absorbent core 7 are respectively superimposed on the water-repellent layers 82 on both sides. The absorbent layer 81 is spaced a certain distance away from the absorbent core 7. Such an absorbent layer 81 helps form a dam to prevent side leakage when the absorbent article 1 is worn, absorbing body exudates flowing out from the sides and directing them toward the absorbent core 7. The absorbent layer 81 can have a grammage of less than or equal to 200 gsm. The absorbent layer 81 can also have a thickness that is the same as or similar to that of the absorbent core 7, or less than that of the absorbent core 7. In one embodiment, the absorbent layer 81 can have a thickness of less than or equal to 3 mm.

[0061] The absorbent layer 81 can be made of any suitable absorbent material and can be constructed, for example, as a single layer or a multi-layer composite structure, wherein the multi-layer composite structure itself may include similar or different absorbent materials. The absorbent layer 81 can be constructed from various nonwoven webs, such as meltblown webs, spunbond webs, spunlace webs, or through-air-bonded carded webs. Furthermore, there are no restrictions on the material color of the absorbent layer 81 and the color can be designed based on actual needs. For example, if the absorbent layer 81 is desired to provide a clear visual effect, thereby instilling in consumers the psychological expectation that the product has good absorption effects, the absorbent layer 81 can be made of a different material color than the surface layer 21 and support layer 22, allowing it to be visible through the surface layer 21 and support layer 22 and attracting the consumer's attention. If the absorbent layer 81 is desired to be ignored by consumers, the absorbent layer 81 can be made of a material color similar to or the same as the surface layer 21 and support layer 22, making it less noticeable.

[0062] The inventors conducted comparative tests and found that the three-dimensional guardrail 8 with the absorbent layer 81 can significantly improve the ability of the absorbent product 1 to absorb a large amount of body excretions instantly, enhance the absorption effect of the absorbent core 7, and reduce the occurrence of side leakage.

[0063] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of 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.

[0064] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A side leakage prevention disposable absorbent product, the absorbent product having a longitudinal direction (X) and a transverse direction (Y) perpendicular to each other, and divided along the longitudinal direction (X) into a front region (3), a back region (5) and a crotch region (4) connected between the front region (3) and the back region (5), characterized in that: The absorbent article comprises: a liquid permeable topsheet (21) configured to face the wearer's body; a liquid-impermeable backsheet (23) disposed opposite the topsheet (21) and configured to face the garment toward the wearer; An absorbent core (7) located between the surface layer (21) and the back layer (23); a pair of three-dimensional guards (8) arranged on opposite sides of the absorbent article along the transverse direction (Y), wherein each three-dimensional guard (8) extends from the front region (3) to the back region (5) along the longitudinal direction (X) and comprises: a water-repellent layer (82) covering the backing layer (23) at its side and connected to the backing layer (23); an absorption layer (81) arranged on a side of the water-repellent layer (82) facing the surface layer (21); The elastic member (83) extends in the longitudinal direction (X) in the water-repellent layer (82).

2. The side leakage preventing disposable absorbent product according to claim 1, characterized in that: The absorbent product further comprises a support layer (22) located between the surface layer (21) and the absorbent core (7), and the absorbent layer (81) of the three-dimensional guard (8) is sandwiched between the support layer (22) and the water-repellent layer (82).

3. The side leakage preventing disposable absorbent product according to claim 2, characterized in that: The lateral width of the support layer (22) is greater than the lateral width of the surface layer (21).

4. The side leakage preventing disposable absorbent product according to claim 1, characterized in that: There is a gap between a pair of three-dimensional guards (8) on opposite sides of the absorbent product, and the transverse width of the absorbent core (7) is greater than the gap, so that the absorbent core (7) partially overlaps with the water-repellent layer (82) of the pair of three-dimensional guards (8).

5. The side leakage preventing disposable absorbent product according to claim 1, characterized in that: The absorbent core (7) is spaced apart from the absorbent layers (81) located on opposite sides thereof in the transverse direction.

6. The side leakage preventing disposable absorbent product according to claim 1, characterized in that: The first end (821) of the water-repellent layer (82) is connected to the surface of the back layer (23) facing the surface layer (21), and the second end (822) of the water-repellent layer (82) opposite to the first end (821) is connected to the surface of the back layer (23) facing away from the surface layer (21), and a longitudinal channel (823) is formed between the first end (821) and the second end (822) of the water-repellent layer (82), and the elastic member (83) is arranged in the longitudinal channel (823).

7. The side leakage preventing disposable absorbent product according to claim 6, characterized in that: At least one of the first end (821) and the second end (822) of the water-repellent layer (82) is connected to the backing layer (23) by means of hot-melt pressure-sensitive adhesive or ultrasonic waves.

8. The side leakage preventing disposable absorbent product according to claim 6, characterized in that: The first end (821) and the second end (822) of the water-repellent layer (82) are aligned.

9. The side leakage preventing disposable absorbent product according to claim 1, characterized in that: In the naturally flat state, the distance between the transverse outermost edges of a pair of three-dimensional guards (8) defines the maximum transverse width of the absorbent article.

10. The side leakage preventing disposable absorbent product according to claim 1, characterized in that: The thickness of the absorption layer (81) is less than or equal to 3 mm, and the grammage range is less than or equal to 200 gsm.

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