Pants-type disposable absorbent article

Abstract

The present invention relates to a pants-type disposable absorbent article. The shorts type disposable absorption product has a longitudinal direction and a transverse direction which are perpendicular to each other and a thickness direction perpendicular to the longitudinal direction and the transverse direction, the absorption product is divided into a front waist area, a rear waist area and a crotch area connected between the front waist area and the rear waist area in the longitudinal direction, and the absorption product comprises a liquid-permeable top layer and a liquid-permeable bottom layer, a body facing the body of the wearer; the liquid-tight bottom layer and the top layer are oppositely arranged in the thickness direction, and the liquid-tight bottom layer is arranged to face clothes of a wearer; an absorbent core sandwiched between the top layer and the bottom layer and extending longitudinally in the crotch region; wherein the absorption core is provided with a hollow-out part which is through in the thickness direction, and at least the position, corresponding to the hollow-out part, of the bottom layer is transparent or semitransparent.

Description

Technical Field

[0001] The present invention relates to absorbent sanitary products, and more particularly to pant-type disposable absorbent articles in which body exudates are visible from the outside of the product. Background Art

[0002] Pants-type absorbent products are disposable sanitary products commonly used by infants and young children, including open-type diapers and closed-type pull-up pants. Pants-type absorbent products not only have the function of absorbing urine and preventing leakage, but also have the advantages of being easy to wear and convenient for activities. After wearing them, the baby is like wearing a small underwear that fits comfortably, so that the baby can move more naturally. Pants-type absorbent products can help caregivers such as mothers reduce fatigue, and are also the first choice for infants and young children in the toddler stage.

[0003] Existing shorts-type absorbent products are usually composed of liquid-impermeable films, non-woven fabrics and polymer absorbent materials. Caregivers cannot observe the internal state of the absorbent product in real time from the outside of the absorbent product, but need to pull the absorbent product open from the waist or leg side to know whether the infant has discharged body excrement. The process of pulling the absorbent product open can easily cause body excrement to leak out or stain fingers, sheets, clothes, etc. In addition, the inability to observe the internal state of the absorbent product in real time from the outside of the absorbent product can easily lead to the inability to replace the absorbent product contaminated with body excrement in a timely manner, which increases the adverse stimulation to the skin of infants and children and causes various skin symptoms.

[0004] Therefore, there is a need in the art for further optimizing the design of pant-type absorbent products so that caregivers can perceive the internal state of the absorbent products in real time, while this perceptible characteristic does not reduce the leakage resistance, fit and comfort of the products. Summary of the invention

[0005] The present invention aims to provide a shorts-type disposable absorbent product which can at least solve some of the above-mentioned technical problems.

[0006] According to one aspect of the present invention, there is provided a shorts-type disposable absorbent product having a longitudinal and lateral direction perpendicular to each other, and a thickness direction perpendicular to the longitudinal and lateral directions, wherein the absorbent product is divided into a front waist area, a rear waist area and a crotch area connected between the front waist area and the rear waist area along the longitudinal direction, wherein the absorbent product comprises: a liquid-permeable top layer arranged to face the body of the wearer; a liquid-impermeable bottom layer arranged opposite to the top layer in the thickness direction and arranged to face the wearer's clothing; an absorbent core sandwiched between the top layer and the bottom layer and extending in the crotch area in the longitudinal direction; wherein the absorbent core is formed with a hollow portion penetrating in the thickness direction, and at least the position of the bottom layer corresponding to the hollow portion is transparent or translucent.

[0007] In some embodiments, the bottom layer includes: a backsheet arranged to face the wearer's clothing and made of a non-whitening treated nonwoven material; and a bottom film located between the backsheet and the absorbent core and constructed as a high-transmittance PE film.

[0008] In some embodiments, the hollow portion includes a plurality of hollow channels extending at angles to each other.

[0009] In some embodiments, the plurality of hollow channels are intersecting and communicating with each other.

[0010] In some embodiments, the hollow portion includes a plurality of groups of hollow areas spaced apart in the longitudinal direction, each group includes at least one hollow area, and any two groups of hollow areas are not connected.

[0011] In some embodiments, each group of hollow areas includes a plurality of hollow areas spaced apart in a transverse direction, and any two hollow areas are not connected.

[0012] In some embodiments, any one hollow area in each group of hollow areas is located between two adjacent hollow areas in another adjacent group of hollow areas.

[0013] In some embodiments, the absorbent article has a slit, and the hollow area is formed by elastically deforming the absorbent article at least at the location where the slit is formed.

[0014] In some embodiments, the absorbent article comprises a pair of side guards attached to the topsheet and arranged opposite each other in the transverse direction, wherein each side guard extends in the longitudinal direction and is configured to be transparent or translucent.

[0015] In some embodiments, the side guard is made of a non-whitening treated nonwoven material.

[0016] 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 specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 is a flat schematic diagram of a shorts-type disposable absorbent product according to an embodiment of the present invention;

[0019] Figure 2 is a front view of a pant-type disposable absorbent article according to an embodiment of the present invention, wherein the absorbent article is shown in a waist-closed configuration suitable for wearing;

[0020] Figure 3is a rear view of a pant-type disposable absorbent article according to an embodiment of the present invention, wherein the absorbent article is shown in a waist-closed configuration suitable for wearing;

[0021] Figure 4 is a cross-sectional schematic diagram of a pants-type disposable absorbent product according to one embodiment of the present invention;

[0022] Figures 5A-6B Schematic diagrams of various examples of hollow parts of an absorbent core according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1-absorbent article; 2-front waist area; 21-front waist edge; 22-front side edge; 23-front waist elastic material; 3-crotch area; 31-crotch side edge; 32-leg opening; 4-back waist area; 41-back waist edge; 42-back side edge; 43-back waist elastic material; 5-top layer; 51-face piece; 53-diffuser layer; 6-absorbent core; 60-separated area; 60a-60j: various areas; 61-hollow part; 62-slit; 63-bevel section; 7-bottom layer; 71-bottom film; 72-bottom film; 8-side baffle DETAILED DESCRIPTION

[0025] Now, with reference to the accompanying drawings, a schematic scheme of the shorts-type disposable absorbent product disclosed in the present invention is described in detail. Although the accompanying drawings are provided to present some embodiments of the present invention, the accompanying drawings do not have to be drawn according to the size of the specific embodiments, and certain features may be enlarged, removed or partially cut to better illustrate and explain the disclosure of the present invention. Some components in the accompanying drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0026] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0027] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0028] Definition of terms

[0029] With respect to absorbent articles, "disposable" 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).

[0030] "Absorbent article" herein refers to an article 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 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 washed or otherwise restored for reuse. It should be understood that the present disclosure is applicable to various disposable absorbent articles, including but not limited to various shorts-type personal hygiene products, including diapers and pull-up pants, etc., without departing from the scope of the present disclosure.

[0031] As used herein, the term "nonwoven" or "nonwoven" generally refers to a web having a structure of individual fibers or yarns that is a sandwich, but not in a discernible 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.

[0032] "Body-facing" and "garment-facing" refer to the relative position of an element or the relative position of surfaces of an element or a 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 near the wearer's clothing, which clothing may be worn over a disposable absorbent article).

[0033] As used herein, the term "stretchable" or "extensibility" generally refers to the dimensional extensibility of a material in the direction of force, such as the dimension in the direction of force can be extended by at least about 25%, or at least about 50%, or at least about 75% compared to the dimension in the natural relaxed state. A stretchable material does not necessarily have recovery properties or does not necessarily have significant recovery. For example, an elastic material is a stretchable material with recovery properties. A meltblown web may be stretchable, but the recovery properties are greatly reduced compared to its extensibility, or even have no recoverability, and is therefore an stretchable non-elastic material.

[0034] As used herein, the term "elastomeric" or "elastic" generally refers to a material that is stretched in at least one direction (such as 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% longer 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.

[0035] As used herein, the term "elastic material" includes an elastic elongated material, such as but not limited to elastic rubber bands, elastic yarns, elastic bands, elastic films, elastic fabrics (such as elastic fiber nonwoven sheets), and elastic composite materials, etc. The elastic rubber bands, for example, can be made of spandex in a warp beam manner according to a spinning process.

[0036] As used herein, the term "bonded" refers herein 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 via, for example, adhesives, pressure bonds, heat bonds, ultrasonic bonds, splicing, stitching, and / or welding.

[0037] 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.

[0038] Pants type disposable absorbent products

[0039] The present disclosure provides a shorts-type absorbent product in which body excretions are visible from the outside of the product, which is used for the hygienic care of infants and young children. The shorts-type disposable absorbent product has a hollow portion added to the absorbent core, and the liquid-impermeable bottom sheet of the absorbent product is changed to transparent or translucent at least at the position corresponding to the hollow portion, and a pair of lateral side baffles can be further changed to transparent or translucent, thereby improving the visual intuitiveness of the absorbent product after being contaminated by body excretions. Once the infant and young children discharge body excretions, the caregiver can promptly discover and replace the contaminated absorbent product. This can effectively reduce the irritation caused to the skin of infants and young children, and help improve the user experience.

[0040] Figures 1 to 3 A pants-type disposable absorbent article (hereinafter referred to as "absorbent article") 1 according to the present disclosure is exemplarily shown. The absorbent article may be, for example, a diaper. Figure 1 The absorbent article is shown in a naturally flat state, without any external force causing deformation or wrinkles. Figure 2 and Figure 3The absorbent article 1 is shown in a configuration suitable for wearing. As shown, the absorbent article 1 has a transverse x and longitudinal y planes that are perpendicular to each other, and a thickness direction z that is perpendicular to the xy plane. For clarity, Figures 1 to 3 The longitudinal centerline x1 is also marked.

[0041] Along the longitudinal direction x, the absorbent article 1 can be divided into a front waist region 2, a crotch region 3 and a back waist region 4, wherein the crotch region 3 is connected between the front waist region 2 and the back waist region 4. The front waist region 2 has front side edges 22 on opposite sides in the transverse direction, and a front waist edge 21 connected between the two front side edges 22. The back waist region 4 has back side edges 42 on opposite sides in the transverse direction, and a back waist edge 41 connected between the two back side edges 42. The crotch region 3 has crotch side edges 31 on opposite sides in the transverse direction. The front waist edge 21 and the back waist edge 41 are opposite in the longitudinal direction and substantially define the length of the absorbent article 1 in the longitudinal direction x. It can be understood that the edges of the front waist region 2, the back waist region 4 and the crotch region 3 do not necessarily present a straight line configuration as shown in the figure, but can be designed with an arc configuration as needed, and even the same edge can be formed by connecting multiple curves of different curvatures, or by connecting an arc and a straight line.

[0042] The absorbent article 1 is intended to be worn around the lower torso of a wearer, such as an infant. In this state, the front waist region 2 roughly covers the wearer's ventral waistline, the rear waist region 4 roughly covers the wearer's dorsal waistline, and the crotch region 3 is positioned between the wearer's legs. The single-piece absorbent article 1 needs to be bent in the crotch region 3 so that the front waist region 2 and the rear waist region 4 are opposite to each other, and then joined to the front waist region 2 by means of, for example, two patches extending from the lateral opposite sides of the rear waist region 4, so as to form a shorts configuration suitable for wearing. At this time, the front waist edge 21 and the rear waist edge 41 together enclose a waist opening for accommodating the wearer's torso, and the two crotch side edges 31 of the crotch region 3 each enclose a leg opening 32 for accommodating the wearer's thighs. In the case where a pair of lateral side guards are provided on the absorbent article 1, each side guard can roughly surround the corresponding leg of the wearer to prevent side leakage. By arranging the front waist elastic material 23 in the front waist region 2 and the back waist elastic material 43 in the back waist region 4, the absorbent article 1 can be made to fit closely to the wearer's skin and provide stable support. The crotch side edge 31 can also be arranged with elastic material so that the leg opening 32 together with the side guards tightly surround the wearer's lower limbs to prevent body discharge from leaking. For the purpose of convenient connection, the patch can be provided with a connecting structure so that it can be detachably connected to the front waist region 2. Reliable connecting structures such as hook and loop fasteners or Velcro.

[0043] The absorbent article 1 is generally formed by a top layer and a bottom layer surrounding an absorbent core in the thickness direction, and an additional functional sheet layer may also be provided. Figure 4 Two different configurations of the absorbent article 1 in the thickness direction are exemplarily shown.

[0044] exist Figure 4 In the illustrated embodiment, the top layer 5 is made of a single face sheet 51, which extends substantially on the most of the transverse dimensions of the absorbent article 1. The face sheet 51, as the body-facing sheet of the absorbent article 1, is advantageously provided for comfort, and plays the function of fast absorption and guiding body discharges. Specifically, the face sheet 51 defines a surface that can directly contact the wearer's skin, and is hydrophilic or liquid-permeable to receive body discharges, and can guide body discharges downwards to the absorbent core 6. The face sheet 51 preferably hardly retains liquid in its structure, thereby providing a relatively comfortable and non-irritating touch while being close to the wearer's skin. The face sheet 51 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 face sheet 51 can be constructed of various nonwoven webs such as melt-blown webs, spunbond webs, spunlace webs or air-through bonded combed webs. Examples of suitable topsheet materials may include, but are not limited to, natural fiber webs (such as cotton), rayon, spunlace webs, bonded carded webs of 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 web materials may also be used, as may laminates of these materials or combinations thereof. In other embodiments, the topsheet may also consist of a topsheet and other layers disposed below the topsheet.

[0045] As an aid, a guide layer 53 or surge management layer may be arranged between the top layer 5 and the absorbent core 6. The guide layer 53 helps the absorbent article 1 to absorb liquid quickly and evenly, and disperses and guides the liquid to most areas of the absorbent core 6, preventing the accumulation of liquid from causing the absorbent core to be blocked due to excessive local absorption and further forming back permeation. The guide layer 53 may be connected to the absorbent core 6, for example, by an adhesive.

[0046] The absorbent core 6 is arranged below the top layer 5, and is used to enable the absorbent article 1 to fully absorb, store and lock the wearer's body discharge, especially liquid. Here, the absorbent core 6 can be mainly located in the crotch area, and can also extend into the front waist area 2 at one end, and extend into the back waist area 4 at the other end. The absorbent core 6 can be designed as any suitable configuration, such as a composite core or composite laminate core made of stacked liquid absorbent raw materials, which can show a certain degree of retractability and comfort, no irritation to the wearer's skin, and can absorb and retain body discharge. The composite core or composite laminate core can be made of any suitable material and can include any number of required layers. For example, in one embodiment, the layer of the composite core or composite laminate core can include the outermost top layer and bottom layer, and a core support layer and an absorbent material layer are arranged therebetween. Wherein 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 characteristics. 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 laminated structure. The absorbent material layer can be made of any suitable absorbent material, such as a super absorbent polymer SAP. SAP should refer to a polymer that absorbs and retains a very large amount of liquid relative to its own mass. The cross-linked water-absorbing polymer classified as a hydrogel absorbs aqueous solution through hydrogen bonds and other polar forces with water molecules. The water absorption capacity of SAP is partly based on ionicity (an index of aqueous solution ion concentration) and the polar functional groups of SAP with water affinity. SAP is generally manufactured by polymerizing 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 can also be used to make super absorbent polymers, such as polyacrylamide copolymers, ethylene maleic anhydride copolymers, cross-linked carboxymethyl cellulose, polyvinyl alcohol copolymers, cross-linked polyethylene oxide and starch graft copolymers of polyacrylonitrile. SAP can be present in absorbent products in the form of particles or fibers.

[0047] The absorbent core 6 can be processed to facilitate the real-time observation of the contamination inside the absorbent product 1 from the outside. To this end, a hollow portion 61 is formed in the absorbent core 6 that runs through in the thickness direction z. The hollow portion 61 can be constructed in any suitable shape in the xy plane, and can be arranged in particular at a position close to the rear waist region 4 of the absorbent core 6. Here, "close" refers to a relative position relative to the longitudinal middle of the absorbent core 6. The hollow portion 61 close to the rear waist region 4 can be further aligned with the buttocks of the wearer. The presence of the hollow portion also increases the deformation flexibility of the absorbent core 6, so that the absorbent product 1 can fit the wearer's body better, especially in the crotch.

[0048] Figure 5AAn embodiment of the absorbent core 6 is shown. As shown in the figure, the hollow portion 61 is constructed as two hollow channels across the entire surface of the absorbent core 6, wherein each hollow channel extends continuously from one of the two transversely opposite side edges of the absorbent core 6 to the other side edge obliquely relative to the longitudinal direction x, thereby dividing the absorbent core 6 into a plurality of mutually independent regions 60 bounded by the hollow channels. Figure 5A It is shown that two intersecting and interconnected hollow channels can separate the absorbent core 6 into four unconnected regions, wherein two regions 60a and 60c are arranged longitudinally, and the pointed ends of the two regions point to each other. Between the two regions 60a and 60c are two triangular regions 60b arranged transversely. The longitudinal dimension of the region 60a closer to the rear waist region 4 can be slightly smaller than the longitudinal dimension of the region 60c closer to the front waist region 4.

[0049] Figure 5B Another embodiment of the absorbent core 6 is shown. Figure 5A The embodiment shown is different in that the hollow portion 61 is composed of three hollow channels that cross into a Y shape, wherein one hollow channel extends longitudinally from a side edge of the absorbent core 6 near the rear waist region 4, and the other two hollow channels extend from two side edges that are opposite in the transverse direction. Finally, the three hollow channels converge and communicate inside the absorbent core 6, and the absorbent core 6 is separated into three independent regions 60, wherein two transversely arranged regions 60d are near the rear waist region, and a longitudinally elongated region 60e is near the front waist region. The side of the region 60d facing the region 60e can be a straight edge, or have a certain concave curvature as shown in the figure, or can also have a convex curvature, and the side of the region 60e facing the region 60d can have a matching line type. In addition, this concave or convex arc edge is also applicable to the edge of the hollow portion in other embodiments.

[0050] Figure 5C Another embodiment of the absorbent core 6 is shown. Figure 5A The embodiment shown is different in that the hollow portion 61 is composed of two vertically intersecting hollow channels, one of which is a longitudinal hollow channel that continuously extends across the entire longitudinal length of the absorbent core 6, and the other is a transverse hollow channel that continuously extends across the entire transverse length of the absorbent core 6. The cross-intersecting hollow portions 61 divide the absorbent core 6 into four mutually unconnected regions, two of which are located near the rear waist region and arranged transversely, and the other two regions 60g are located near the front waist region and arranged transversely, and the longitudinal dimension of the region 60g is greater than the longitudinal dimension of the region 60f.

[0051] Figure 5D Another embodiment of the absorbent core 6 is shown. Figure 5C Similarly, the multiple hollow channels of the hollow portion 61 are vertically intersecting, but the difference is that: Figure 5DTwo hollow channels extending continuously transversely to cross the entire absorbent core 6 and a hollow channel extending continuously from a side edge of the absorbent core 6 near the rear waist region 4 to the middle of the absorbent core 6 are shown, thereby constructing a hollow portion 61 of earth-shaped. This hollow portion 61 is bounded by the intersecting hollow channels, and the absorbent core 6 is divided into six independent regions 60, including two transversely arranged regions 60h near the rear waist region 4, a longitudinal region 60j near the front waist region, and two transversely arranged regions 60i located between the regions 60h and 60j. The longitudinal dimension of the region 60j may be the largest, followed by the longitudinal dimension of the region 60h, and the smallest is the longitudinal dimension of the region 60i.

[0052] exist FIG. 5A to FIG. 5D In the illustrated embodiment, the absorbent core 6 can be composed of a composite core or a composite laminate core combined with an outer wrapping sheet, and the wrapping sheet is connected to the guide layer 53, or to the bottom layer 7, wherein the above-mentioned hollow channels of various layouts are formed in the composite core or the composite laminate core to construct the hollow portion 61. Since the composite core or the composite laminate core is shaped around the wrapping sheet, the areas 60 separated by the hollow channels will not move relative to each other. The wrapping sheet can be made of a transparent or translucent liquid-permeable material, such as a liquid-permeable transparent or translucent film material. In some embodiments, an array of pinhole structures can be formed on the wrapping sheet to help quickly guide the liquid to the internal composite core or composite laminate core.

[0053] Above FIG. 5A to FIG. 5D The hollow channel-type hollowing-outs 61 shown can advantageously be arranged in the absorbent core 6 close to the buttocks.

[0054] In other embodiments not shown, the long hollow channel may not divide the absorbent core 6 into several unconnected regions. Specifically, both ends of the hollow channel may be spaced from the side of the absorbent core 6, so that the regions of the absorbent core 6 separated by the hollow channel are still connected to each other.

[0055] Fig. 6A and Figure 6B Another embodiment of the absorbent core 6 is shown. As shown in the figure, the hollow portion 61 is configured as a plurality of hollow areas arranged in an array, wherein each hollow area is spaced apart from the side of the absorbent core 6. In the embodiment shown, the slit 62 can be formed on the absorbent core 6 and elastically deformed to convert the slit 62 into a hollow area.

[0056] Fig. 6A A configuration of the slit 62 is shown, which is composed of two beveled sections 63 connected together at an angle. When the absorbent core 6 is deformed at the position of the slit 62, the slit 62 forms a Figure 6BThe hollowed-out portion is in the form of an arrow-shaped independent hollowed-out area. A plurality of slits 62 are arranged at intervals on the absorbent core 6 and are spaced from the side of the absorbent core 6, and the hollowed-out areas formed thereby are also not connected to each other and are spaced from the side. These slits 62 can be arranged in an array in a certain regular pattern. For example, the slits 62 are divided into a plurality of groups, wherein these slit groups are evenly spaced along the longitudinal direction x, and the one or more slits contained in each slit group are evenly spaced in the transverse direction y. Fig. 6A An array of slits 62 is shown. As shown in the figure, of two adjacent groups (two horizontal rows) of slits 62, one group includes three slits 62 evenly spaced in the horizontal direction, and the other group includes four slits 62 evenly spaced in the horizontal direction. Any slit is staggered with the slits of the adjacent group, that is, it is located between two adjacent slits of the adjacent group. In addition, the arrow directions of the slits 62 of the two adjacent groups can be opposite. Such a slit array finally forms Figure 6B An array of interspersed hollow areas is shown.

[0057] Apart from Fig. 6A and Figure 6B The hollow portion 61 formed by the hollow area array shown can also be formed into a desired hollow portion 61 configuration by other suitable hollow area arrangements. For example, the arrow-shaped slit composed of two oblique cut sections 63 can be replaced by a straight slit, an x-shaped slit, etc., and the corresponding hollow portion can also be obtained by modifying the absorbent core 6.

[0058] The above-mentioned hollow area can also be applied to the aforementioned absorbent core 6 composed of a composite core or a composite laminated core and an outer wrapping sheet.

[0059] Arranged below the absorbent core 6 is a bottom layer 7. In the illustrated embodiment, the bottom layer 7 comprises an outermost backsheet 72 and a bottom film 71 attached to the surface of the absorbent core 6 facing the backsheet 72. The backsheet 72 is the part of the absorbent article 1 facing the wearer's clothing, and it is made of nonwoven material. The backsheet 72 spans the entire lateral width of the absorbent article 1. The bottom film 71 is sandwiched between the backsheet 72 and the absorbent core 6, and it generally has the function of blocking body discharges, especially liquid flowing through. In addition, the bottom film 71 can be constructed to allow gas to be discharged from the absorbent article 1, but prevent liquid from passing through. Any liquid-impermeable material can generally be used to form the bottom film 71. 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 the backsheet layer can be selected from various known films and / or fabrics, and specific materials are appropriately selected to provide liquid barriers, strength and wear resistance of the desired level, etc.

[0060] In conjunction with the absorbent core 6 with the hollow portion 61, the bottom layer 7 can be designed as a transparent or translucent material so as to facilitate observation of the contamination from the outside of the absorbent article 1. Here, "transparent" and "translucent" both refer to the property of the material allowing light to penetrate, wherein transparent materials allow almost all light to penetrate, and the light transmittance can reach more than 80%, preferably more than 90%, and more preferably more than 95%, while translucent materials allow partial light to penetrate, and the light transmittance is more than 50%, preferably about 60%, and more preferably about 70%. Whether it is a transparent bottom layer or a translucent bottom layer, it allows the absorbent core 6 to be visually observed from the outside of the absorbent article 1, especially the situation where the hollow portion 61 is contaminated by body discharges. The bottom layer 7 can be made of a transparent or translucent liquid-impermeable material as a whole. Alternatively, the bottom layer 7 can be made of a transparent or translucent liquid-impermeable material only at the position corresponding to the hollow portion. To this end, the backsheet 72 can be made of non-woven material that has not been whitened, and its light transmittance can reach at least 50%, or even between 60% and 75%, and a high-transmittance PE film with good light transmittance performance can be used to make the bottom film 71, such as a PE film with a light transmittance of more than 90%, preferably a PE film with a light transmittance of more than 95%.

[0061] In order to better prevent side leakage, a pair of side baffles 8 can be attached to the top layer 5, and the pair of side baffles 8 are arranged on both sides of the absorbent article 1 in a lateral direction, wherein each side baffle 8 extends in a longitudinal direction. The side baffles 8 can be attached to the surface of the top sheet 51 facing away from the absorbent core 6, and can be combined with the back sheet 72 along the periphery to form a seal, thereby wrapping the absorbent core 6, such as Figure 4 As shown. In the wearing configuration, the side guards 8 stand up and extend around the legs of the wearer. The side guards 8 are configured to be transparent or translucent, which can help the caregiver observe the absorbent article 1 being contaminated by body discharges from the wearer's leg side. If the wearer also wears clothes on the outside of the absorbent article 1, so that it is not convenient to observe directly through the hollow part 61, the transparent or translucent side guards 8 can provide a more convenient observation position. The side guards 8 can be made of non-woven materials, such as non-woven materials that have not been whitened, to provide better light penetration properties.

[0062] The figure only shows an example of a diaper-like shorts-type absorbent product 1 in which the front waist region 2 and the back waist region 4 can be joined or separated by a patch so that the waist can be closed or opened. It is conceivable that the above-mentioned absorbent core with a hollow portion, a transparent or translucent bottom layer, and a transparent or translucent side baffle 8 can also be applied to a pull-up pants-like shorts-type absorbent product whose waist cannot be opened. In such an absorbent product, the front waist region and the back waist region are permanently joined together and cannot be separated without destroying the product, so the patch is omitted.

[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 may 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 shorts-type disposable absorbent product, having longitudinal and transverse directions perpendicular to each other, and a thickness direction perpendicular to the longitudinal and transverse directions, wherein the absorbent product is divided into a front waist region (2), a rear waist region (4) and a crotch region (3) connected between the front waist region (2) and the rear waist region (4) along the longitudinal direction, characterized in that: The absorbent article comprises: a liquid permeable top layer (5) arranged to face the body of the wearer; a liquid-impermeable bottom layer (7) disposed opposite to the top layer (5) in the thickness direction and arranged to face the wearer's garment; An absorbent core (6) sandwiched between the top layer (5) and the bottom layer (7) and extending longitudinally in the crotch region (3); The absorbent core (6) is formed with a hollow portion (61) penetrating in the thickness direction, and at least a position of the bottom layer (7) corresponding to the hollow portion (61) is transparent or translucent.

2. The pants-type disposable absorbent product according to claim 1, characterized in that: The bottom layer (7) comprises: a backsheet (72) arranged to face the garment of the wearer and made of a non-whitening treated nonwoven material; The bottom film (71) is located between the bottom sheet (72) and the absorbent core (6) and is constructed as a high-transmittance PE film.

3. The shorts-type disposable absorbent product according to claim 1 or 2, characterized in that: The hollow portion (61) comprises a plurality of hollow channels extending at angles to each other.

4. The pants-type disposable absorbent product according to claim 3, characterized in that: The plurality of hollow channels are intersecting and communicating with each other.

5. The shorts-type disposable absorbent product according to claim 1 or 2, characterized in that: The hollow portion (61) comprises a plurality of groups of hollow areas spaced apart in the longitudinal direction, each group comprising at least one hollow area, and any two groups of hollow areas are not connected.

6. The pants-type disposable absorbent product according to claim 5, characterized in that: Each group of hollow areas includes a plurality of hollow areas spaced apart in the transverse direction, and any two hollow areas are not connected.

7. The pants-type disposable absorbent product according to claim 5, characterized in that: Any hollow area in each group of hollow areas is located between two adjacent hollow areas in another adjacent group of hollow areas.

8. The pants-type disposable absorbent product according to claim 5, characterized in that: The absorbent article has a slit (62), and the hollow area is formed by elastically deforming the absorbent article at least at the location where the slit (62) is formed.

9. The shorts-type disposable absorbent product according to claim 1 or 2, characterized in that: The absorbent article comprises a pair of side guards (8) attached to the top layer (5) and arranged opposite to each other in the transverse direction, wherein each side guard (8) extends in the longitudinal direction and is configured to be transparent or translucent.

10. The pants-type disposable absorbent product according to claim 9, characterized in that: The side baffle (8) is made of a non-whitening treated non-woven material.

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