Pants-type disposable absorbent article
By incorporating transparent or semi-transparent perforations and side baffles into the absorbent material, the problem of the inability to observe the internal condition in real time in existing technologies is solved, enabling timely replacement and reducing skin irritation in infants and young children.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KIMBERLY CLARK (CHINA) CO LTD
- Filing Date
- 2025-11-14
- Publication Date
- 2026-06-04
Smart Images
Figure CN2025134895_04062026_PF_FP_ABST
Abstract
Description
Shorts-type disposable absorbent products Technical Field
[0001] This invention relates to absorbent hygiene products, and more particularly to shorts-type disposable absorbent articles in which bodily excretions are visible from the outside of the product. Background Technology
[0002] Short-length absorbent diapers are commonly used disposable hygiene products for infants and toddlers, including open-style diapers and closed-style pull-ups. Short-length absorbent diapers not only absorb urine and prevent leaks, but also offer advantages such as ease of wear and freedom of movement, making them feel like comfortable, well-fitting underwear for babies, allowing for more natural movement. Short-length absorbent diapers can also help reduce the burden on caregivers, such as mothers, and are a preferred choice for toddlers learning to walk.
[0003] Existing absorbent shorts typically consist of a liquid-impermeable membrane, non-woven fabric, and absorbent polymer. Caregivers cannot observe the internal state of the absorbent shorts from the outside; instead, they must pull the absorbent shorts open from the waist or legs to see if the infant has excreted. This process of pulling open the absorbent shorts can easily lead to leakage or soiling of fingers, sheets, and clothing. Furthermore, the inability to observe the internal state of the absorbent shorts from the outside can prevent timely replacement of soiled absorbent shorts, increasing the risk of skin irritation and potentially causing various skin symptoms.
[0004] Therefore, there is a need in this field for further optimization of the design of shorts-type absorbent products so that caregivers can perceive the internal state of the absorbent product in real time, while this perceptibility does not reduce the product's leak-proofness, fit, and comfort. Summary of the Invention
[0005] The present invention aims to provide a shorts-type disposable absorbent product that can at least solve some of the above-mentioned technical problems.
[0006] According to one aspect of the present invention, a shorts-type disposable absorbent article is provided, having a longitudinal and a transverse direction perpendicular to each other, and a thickness direction perpendicular to the longitudinal and transverse directions. The absorbent article is divided along the longitudinal direction into a front waist area, a back waist area, and a crotch area connecting the front waist area and the back waist area. The absorbent article comprises: a liquid-permeable top layer arranged facing the wearer's body; a liquid-impermeable bottom layer disposed opposite to the top layer along the thickness direction and arranged facing the wearer; and an absorbent core sandwiched between the top layer and the bottom layer and extending longitudinally in the crotch area. The absorbent core has a perforated portion extending through the thickness direction, and at least the portion of the bottom layer corresponding to the perforated portion is transparent or translucent.
[0007] In some embodiments, the underlying layer includes: a backing sheet arranged as clothing facing the wearer and made of a non-woven material that has not undergone whitening treatment; and a bottom film located between the backing sheet and the absorbent core and configured as a high-permeability PE film.
[0008] In some embodiments, the cutout portion includes multiple cutout channels that extend at an angle to each other.
[0009] In some embodiments, the multiple perforated channels are intersecting and interconnected.
[0010] In some embodiments, the cutout portion includes multiple sets of cutout areas arranged at intervals in the longitudinal direction, each set including at least one cutout area, and no two sets of cutout areas are connected.
[0011] In some implementations, each set of cutout areas includes multiple cutout areas arranged at intervals in the horizontal direction, and no two cutout areas are connected.
[0012] In some implementations, any one of the cutout areas in each group is located between two adjacent cutout areas in another adjacent group.
[0013] In some embodiments, the absorbent article has a slit, and the perforated 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 includes a pair of side panels attached to the top layer and arranged laterally opposite each other, wherein each side panel extends longitudinally and is configured to be transparent or translucent.
[0015] In some embodiments, the side guard is made of a nonwoven material that has not undergone whitening treatment.
[0016] Other features and advantages of the present invention will partly become apparent to those skilled in the art upon reading this application, and partly will be described in conjunction with the accompanying drawings in the detailed description below. Attached Figure Description
[0017] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:
[0018] Figure 1 is a flat schematic diagram of a shorts-type disposable absorbent article according to an embodiment of the present invention;
[0019] Figure 2 is a front view of a shorts-type disposable absorbent article according to an embodiment of the present invention, wherein the absorbent article is shown in a waist closure configuration suitable for wearing;
[0020] Figure 3 is a rear view of a shorts-type disposable absorbent article according to an embodiment of the present invention, wherein the absorbent article is shown in a waist closure configuration suitable for wearing.
[0021] Figure 4 is a cross-sectional schematic diagram of a shorts-type disposable absorbent article according to an embodiment of the present invention;
[0022] Figures 5A-6B are schematic diagrams of various examples of the hollowed-out portion of the absorber core according to embodiments of the present invention.
[0023] Explanation of reference numerals in the attached drawings: 1-Absorbent material; 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-Rear waist area; 41-Rear waist edge; 42-Rear side edge; 43-Rear waist elastic material; 5-Top layer; 51-Sheet; 53-Guiding layer; 6-Absorbent core; 60-Separated areas; 60a-60j: Various areas; 61-Perforated section; 62-Slit; 63-Beveled section; 7-Bottom layer; 71-Bottom film; 72-Bottom sheet; 8-Side panel. Detailed Implementation
[0024] The schematic embodiments of the shorts-type disposable absorbent article disclosed in this invention will now be described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of the invention, they 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 the invention. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar expressions appearing in the specification do not necessarily refer to all drawings or examples.
[0025] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.
[0026] The terms “first,” “first,” “second,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.
[0027] Terminology Definition
[0028] 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).
[0029] "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 various shorts-type personal hygiene products, including diapers and pull-ups, without departing from the scope of this disclosure.
[0030] 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.
[0031] "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 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).
[0032] 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.
[0033] As used herein, the terms "elastomer" or "elastic" generally refer to a material that, by applying a tensile force, is stretched in at least one direction (such as the machine direction), and by releasing the tensile force, shrinks / recovers to approximately its original size. For example, a stretched material may have an extended length of at least about 50% longer than its unstretched length in its relaxed state, and by releasing the tensile force, it may recover to a length within at least 50% of its extended length.
[0034] 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 warp-spinning process.
[0035] 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.
[0036] 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.
[0037] Shorts-type disposable absorbent products
[0038] This disclosure discloses a shorts-type absorbent liner with visible bodily waste for infant hygiene. The shorts-type disposable absorbent liner features a perforated section within the absorbent core, and the liquid-impermeable backing is made transparent or semi-transparent at least at locations corresponding to the perforated section. Furthermore, a pair of transverse side panels can be made transparent or semi-transparent, thereby improving the visual visibility of bodily waste on the absorbent liner. Once an infant has excreted waste, caregivers can promptly detect and replace the contaminated absorbent liner. This effectively reduces skin irritation for infants and improves the user experience.
[0039] Figures 1 to 3 exemplarily illustrate a shorts-type disposable absorbent article (hereinafter referred to as "absorbent article") 1 according to the present disclosure. This absorbent article can be, for example, a diaper. Figure 1 shows the configuration of the absorbent article in its natural, flat state, without deformation or wrinkling under external force, while Figures 2 and 3 show the configuration of the absorbent article 1 adapted for wearing. As shown, the absorbent article 1 has mutually perpendicular transverse x and longitudinal y directions, and a thickness direction z perpendicular to the xy plane. For clarity, the longitudinal centerline x1 is also marked in Figures 1 to 3.
[0040] Along the longitudinal direction x, the absorbent article 1 can be divided into a front waist region 2, a crotch region 3, and a rear waist region 4, with the crotch region 3 connecting the front waist region 2 and the rear waist region 4. The front waist region 2 has front edges 22 on opposite sides in the transverse direction, and a front waist edge 21 connecting the two front edges 22. The rear waist region 4 has rear edges 42 on opposite sides in the transverse direction, and a rear waist edge 41 connecting the two rear edges 42. The crotch region 3 has crotch side edges 31 on opposite sides in the transverse direction. The front waist edges 21 and the rear waist edges 41 are opposite each other in the longitudinal direction and substantially define the length of the absorbent article 1 in the longitudinal direction x. It is understood that the edges of the front waist region 2, the rear waist region 4, and the crotch region 3 do not necessarily have a straight line configuration as shown in the figure, but can be designed with curved configurations as needed. It is even possible that the same edge is formed by connecting multiple curves with different curvatures, or by connecting curves and straight lines.
[0041] The absorbent garment 1 is designed to be worn around the lower torso of a wearer (such as an infant). In this state, the front waistband 2 roughly covers the abdominal waist area of the wearer, the back waistband 4 roughly covers the back waist area of the wearer, and the crotch area 3 is positioned between the wearer's legs. The single absorbent garment 1 needs to be bent in the crotch area 3 so that the front waistband 2 and the back waistband 4 are opposite each other, and then joined to the front waistband 2 by means of, for example, two patches extending laterally from opposite sides of the back waistband 4, thereby forming a shorts-like configuration suitable for wearing. At this time, the front waistband edge 21 and the back waistband edge 41 together enclose a waist opening to accommodate the wearer's torso, while the two crotch side edges 31 of the crotch area 3 each enclose a leg opening 32 to accommodate the wearer's thighs. If a pair of lateral side panels are provided on the absorbent garment 1, each side panel can then roughly surround the corresponding leg of the wearer to prevent side leakage. By using the elastic material 23 arranged in the front waist area 2 and the elastic material 43 arranged in the back waist area 4, the absorbent patch 1 can fit snugly against the wearer's skin and provide stable support. Elastic material can also be arranged on the crotch side edge 31 so that the leg opening 32, together with the side panels, tightly surrounds the wearer's lower limbs to prevent leakage of bodily waste. For ease of attachment, the patch can be provided with a connecting structure that allows it to be detachably attached to the front waist area 2. Reliable connecting structures include hook and loop fasteners or Velcro.
[0042] The absorbent article 1 is generally formed in the thickness direction by surrounding the absorbent core with a top layer and a bottom layer, and additional functional layers may also be provided. Figure 4 exemplarily shows two different configurations of the absorbent article 1 in the thickness direction.
[0043] In the embodiment shown in Figure 4, the top layer 5 consists of a single sheet 51 that extends substantially over most of the lateral dimensions of the absorbent article 1. The sheet 51, as the body-facing layer of the absorbent article 1, advantageously provides comfort and functions to rapidly absorb and guide bodily waste. Specifically, the sheet 51 defines a surface that can directly contact the wearer's skin and is hydrophilic or liquid-permeable to receive bodily waste and guide it downwards to the absorbent core 6. The sheet 51 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. The 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 sheet 51 can be constructed from various nonwoven webs such as meltblown web, spunbond web, hydroentangled web, or air-permeable bonded carded web. Examples of suitable topcoat materials include, but are not limited to, natural fiber webs (such as cotton), rayon, spunlace webs, polyester, polypropylene, polyethylene, nylon or other thermally bondable fibers (such as bicomponent fibers), polyolefins, copolymers of polypropylene and polyethylene, linear low-density polyethylene, and bonded carded webs of aliphatic esters (such as polylactic acid). Perforated membrane and web materials may also be used, as well as laminates or combinations thereof. In other embodiments, the top layer may also consist of a sheet and other layers arranged beneath the sheet.
[0044] As an auxiliary step, a flow guide layer 53 or a flow management layer can be arranged between the top layer 5 and the absorbent core 6. The flow guide layer 53 helps the absorbent article 1 to absorb liquid quickly and uniformly, and disperses and guides the liquid to most areas of the absorbent core 6, preventing liquid accumulation that could cause blockage of the absorbent core due to excessive local absorption and further backflow. The flow guide layer 53 can be attached to the absorbent core 6, for example, by means of an adhesive.
[0045] The absorbent core 6 is positioned below the top layer 5 to enable the absorbent article 1 to adequately absorb, store, and lock in the wearer's bodily waste, especially liquids. Here, the absorbent core 6 can be primarily located in the groin area, and may also extend at one end into the front waist area 2 and at the other end into the back waist area 4. The absorbent core 6 can be designed in any suitable configuration, such as a composite core or composite laminate core made of laminated liquid-absorbing raw materials. This composite core or composite laminate core can exhibit a degree of stretchability and comfort, be non-irritating to the wearer's skin, and absorb and retain bodily waste. The composite core or composite laminate core can be made of any suitable material and can contain any number of desired layers. For example, in one embodiment, the layers of the composite core or composite laminate core may include an outermost top layer and a bottom layer, with a core support layer and an absorbent material layer disposed therebetween. The top and bottom layers can be made of the same material, or they can be configured to have different absorption properties. For example, the top and bottom layers can both be made of liquid-permeable nonwoven sheets. The core support layer can be made of, for example, hot-air nonwoven sheets 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 superabsorbent polymers (SAPs). SAP refers to polymers that absorb and retain a very large amount of liquid relative to their own mass. Crosslinkable absorbent polymers 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. SAPs are 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. SAPs can exist in absorbent articles in particulate or fibrous form.
[0046] The absorbent core 6 can be processed to facilitate real-time observation of the contamination status inside the absorbent article 1 from the outside. For this purpose, a perforation 61 extending along the thickness direction z is formed in the absorbent core 6. The perforation 61 can be constructed in any suitable shape in the xy plane, particularly positioned near the lower back area 4 of the absorbent core 6. Here, "near" refers to a relative position with respect to the longitudinal center of the absorbent core 6. The perforation 61 near the lower back area 4 can further align with the wearer's buttocks. The presence of the perforation also increases the flexibility of the absorbent core 6, allowing the absorbent article 1 to conform more closely to the wearer's body, especially in the crotch area.
[0047] Figure 5A illustrates one embodiment of the absorbent core 6. As shown, the cutout portion 61 is configured as two cutout channels spanning the entire surface of the absorbent core 6, each cutout channel extending continuously from one of two laterally opposite sides of the absorbent core 6 at an angle relative to the longitudinal direction x to the other side, thereby dividing the absorbent core 6 into multiple independent regions 60 by the cutout channels. Figure 5A shows that the two intersecting and interconnected cutout channels can divide the absorbent core 6 into four unconnected regions, where two regions 60a and 60c are arranged longitudinally, with their pointed ends pointing towards each other. Between these two regions 60a and 60c are two laterally arranged triangular regions 60b. The longitudinal dimension of region 60a, which is closer to the rear waist region 4, can be slightly smaller than the longitudinal dimension of region 60c, which is closer to the front waist region 4.
[0048] Figure 5B shows another embodiment of the absorbent core 6. Unlike the embodiment shown in Figure 5A, the hollowed-out portion 61 is composed of three intersecting Y-shaped hollowed-out channels. One of these channels extends longitudinally from one side of the absorbent core 6 near the rear waist region 4, while the other two extend from two laterally opposite sides. Ultimately, the three hollowed-out channels converge and connect inside the absorbent core 6, dividing it into three independent regions 60. Near the rear waist region are two laterally arranged regions 60d, and near the front waist region is a longitudinally elongated region 60e. The side of region 60d facing region 60e can be a straight edge, or have a concave or convex arc as shown, while the side of region 60e facing region 60d can have a matching line shape. Furthermore, such concave or convex arc edges are also applicable to the edges of the hollowed-out portions in other embodiments.
[0049] Figure 5C shows another embodiment of the absorber core 6. Unlike the embodiment shown in Figure 5A, the cutout portion 61 is composed of two vertically intersecting cutout channels. One longitudinal cutout channel extends continuously across the entire longitudinal length of the absorber core 6, while the other transverse cutout channel extends continuously across the entire transverse length of the absorber core 6. The intersecting cutout portion 61 divides the absorber core 6 into four unconnected regions. Two regions 60f are located near the rear waist area and are arranged laterally, while the other two regions 60g are located near the front waist area and are arranged laterally. Furthermore, the longitudinal dimension of region 60g is larger than that of region 60f.
[0050] Figure 5D illustrates another embodiment of the absorber core 6. Similar to Figure 5C, the multiple perforated channels of the perforated portion 61 intersect perpendicularly. The difference lies in that Figure 5D shows two horizontally continuous perforated channels spanning the entire absorber core 6, and one perforated channel extending continuously from one side of the absorber core 6 near the rear waist region 4 to the center of the absorber core 6, thus constructing the earth-shaped perforated portion 61. This perforated portion 61, with the intersecting perforated channels as boundaries, divides the absorber core 6 into six independent regions 60, including two horizontally arranged regions 60h near the rear waist region 4, a longitudinally elongated region 60j near the front waist region, and two horizontally arranged regions 60i located between regions 60h and 60j. The longitudinal dimension of region 60j can be the largest, followed by the longitudinal dimension of region 60h, and the smallest is the longitudinal dimension of region 60i.
[0051] In the embodiments shown in Figures 5A to 5D, the absorbent core 6 may be composed of a composite core or a composite laminated core combined with an outer covering sheet, with the covering sheet connected to the flow guiding layer 53 or to the bottom layer 7. The composite core or composite laminated core contains perforated channels of various layouts described above to construct perforated portions 61. Because the composite core or composite laminated core is surrounded and shaped by the covering sheet, the regions 60 separated by the perforated channels will not move relative to each other. The covering sheet may be made of a transparent or translucent liquid-permeable material, such as a liquid-permeable transparent or translucent membrane material. In some embodiments, an array of pinhole structures may be formed on the covering sheet to facilitate rapid guidance of liquid to the internal composite core or composite laminated core.
[0052] The perforated portion 61 of the perforated channel type shown in Figures 5A to 5D above can be advantageously arranged in the position of the absorbent core 6 near the buttocks.
[0053] In other embodiments not shown, the elongated perforated channel may not divide the absorbent core 6 into several unconnected regions. Specifically, the two ends of the perforated channel may be spaced apart from the sides of the absorbent core 6, thereby allowing the regions of the absorbent core 6 separated by the perforated channel to remain interconnected.
[0054] Figures 6A and 6B illustrate another embodiment of the absorbent core 6. As shown, the perforated portion 61 is configured here as a plurality of perforated areas arranged in an array, wherein each perforated area is spaced apart from the side of the absorbent core 6. In the illustrated embodiment, the perforation 62 can be transformed into a perforated area by forming a slit 62 on the absorbent core 6 and causing the absorbent core 6 to elastically deform.
[0055] Figure 6A shows one configuration of the slit 62, which consists of two obliquely cut segments 63 connected at an angle. When the absorbent core 6 deforms at the location of the slit 62, the slit 62 forms an arrow-shaped, independent hollow area, as shown in Figure 6B. Multiple slits 62 are spaced apart on the absorbent core 6 and spaced from the sides of the absorbent core 6, thus forming hollow areas that are also not interconnected and spaced from the sides. These slits 62 can be arranged in a certain regular array. For example, the slits 62 can be divided into multiple groups, where these groups are evenly spaced along the longitudinal direction x, and each group contains one or more slits evenly spaced along the transverse direction y. Figure 6A shows one array configuration of the slits 62. As shown, in two adjacent groups (two horizontal rows) of slits 62, one group contains three slits 62 evenly spaced along the transverse direction, while the other group contains four slits 62 evenly spaced along the transverse direction. Any slit is staggered from the slits in the adjacent group, that is, it is located between two adjacent slits in the adjacent group. In addition, the arrow directions of the slits 62 in the two adjacent groups can be opposite. Such an array of slits ultimately forms the interlaced hollow area array shown in Figure 6B.
[0056] In addition to the hollowed-out portion 61 formed by the hollowed-out area array shown in Figures 6A and 6B, the desired hollowed-out portion 61 configuration can also be formed by other suitable hollowed-out area arrangements. For example, the arrow-shaped cut composed of two oblique cut segments 63 can be replaced with a straight cut, an X-shaped cut, etc., or the corresponding hollowed-out portion can be obtained by modifying the absorbent core 6.
[0057] The aforementioned hollowed-out area can also be applied to the aforementioned absorbent core 6, which is composed of a composite core or a composite laminated core and an outer covering sheet.
[0058] Arranged below the absorbent core 6 is the bottom layer 7. In the illustrated embodiment, the bottom layer 7 includes an outermost backsheet 72 and a bottom membrane 71 attached to the backsheet 72 facing the surface of the absorbent core 6. The backsheet 72 is the portion of the absorbent article 1 facing the wearer's clothing and is made of a nonwoven material. The backsheet 72 spans the entire lateral width of the absorbent article 1. The bottom membrane 71 is sandwiched between the backsheet 72 and the absorbent core 6 and typically functions to block bodily excretions, especially liquids, from passing through. Furthermore, the bottom membrane 71 can be configured to allow gas to escape from the absorbent article 1 but prevent liquids from passing through. Any liquid-impermeable material can generally be used to form the bottom membrane 71. Suitable materials that can be used include microporous polymer membranes, such as polyolefin membranes of polyethylene or polypropylene, nonwoven fabrics and nonwoven laminates, and membrane / nonwoven laminates. The specific structure and composition of the backsheet layer can be selected from a variety of known membranes and / or fabrics, and specific materials are appropriately selected to provide desired levels of liquid barrier, strength, and abrasion resistance, etc.
[0059] The absorbent core 6, which forms the perforated portion 61, can be designed as a transparent or semi-transparent material to facilitate observation of contamination from the outside of the absorbent product 1. Here, "transparent" and "semi-transparent" refer to the material's ability to allow light to pass through. Transparent materials allow almost all light to pass through, with a transmittance of 80% or more, preferably 90% or more, and more preferably 95% or more. Semi-transparent materials allow some light to pass through, with a transmittance of 50% or more, preferably around 60%, and more preferably around 70%. Whether transparent or semi-transparent, the absorbent core 6, especially the perforated portion 61, can be visually observed from the outside of the absorbent product 1, allowing for direct observation of bodily waste contamination. The bottom layer 7 can be made entirely of a transparent or semi-transparent impermeable material. Alternatively, the bottom layer 7 can be made of a transparent or semi-transparent impermeable material only at the locations corresponding to the perforated portions. Therefore, non-woven materials without whitening treatment can be used to make the film 72, which can achieve a light transmittance of at least 50%, or even between 60% and 75%. A high-transmittance PE film with good light transmittance performance can be selected to make the 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%.
[0060] To better prevent side leakage, a pair of side baffles 8 can be attached to the top layer 5. These side baffles 8 are arranged laterally opposite to each other on both sides of the absorbent article 1, with each side baffle 8 extending longitudinally. The side baffles 8 can be attached to the surface of the face sheet 51 facing away from the absorbent core 6 and can be joined with the bottom sheet 72 along the periphery to form a seal, thereby enclosing the absorbent core 6, as shown in Figure 4. In the wearing configuration, the side baffles 8 stand up and extend around the wearer's legs. Constructing the side baffles 8 to be transparent or translucent allows caregivers to observe from the wearer's leg side whether the absorbent article 1 is contaminated with bodily excretions. If the wearer is wearing clothing over the absorbent article 1, making it inconvenient to observe directly through the cutout 61, the transparent or translucent side baffles 8 provide a more convenient observation point. The side baffles 8 can be made of non-woven materials, such as non-bleached non-woven materials, to provide better light transmittance.
[0061] The diagram only shows an example of a diaper-like shorts-type absorbent product 1 where the front waistband 2 and back waistband 4 can be joined or separated via patches, allowing the waistband to be closed or opened. It is conceivable that the aforementioned absorbent core with perforations, transparent or semi-transparent bottom layer, and transparent or semi-transparent side panels 8 could also be applied to pull-up-style shorts-type absorbent products where the waistband cannot be opened. In such absorbent products, the front and back waistbands are permanently joined together and cannot be separated without damaging the product, thus eliminating the need for patches.
[0062] 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.
[0063] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.
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 the longitudinal and transverse directions, the absorbent garment being divided along the longitudinal direction into a front waist area (2), a back waist area (4), and a crotch area (3) connecting the front waist area (2) and the back waist area (4), characterized in that, The absorbent product includes: The top layer (5) of the liquid-permeable material is arranged to face the wearer's body; An impermeable bottom layer (7) is disposed opposite to the top layer (5) along the thickness direction and arranged to face the wearer as clothing; Absorbent core (6) is sandwiched between the top layer (5) and the bottom layer (7) and extends longitudinally in the crotch area (3); The absorbent core (6) has a perforated portion (61) extending through the thickness direction, and at least one position of the bottom layer (7) corresponding to the perforated portion (61) is transparent or semi-transparent.
2. The shorts-type disposable absorbent product according to claim 1, characterized in that, The underlying layer (7) includes: The negative (72) is arranged to face the wearer's clothing and is made of non-woven material without whitening treatment; The bottom film (71) is located between the substrate (72) and the absorbent core (6) and is constructed as a high-permeability PE film.
3. The shorts-type disposable absorbent article according to claim 1 or 2, characterized in that, The hollowed-out portion (61) includes multiple hollowed-out channels that extend at an angle to each other.
4. The shorts-type disposable absorbent product according to claim 3, characterized in that, The multiple hollow channels are intersecting and interconnected.
5. The shorts-type disposable absorbent article according to claim 1 or 2, characterized in that, The hollowed-out portion (61) includes multiple sets of hollowed-out areas arranged at intervals in the longitudinal direction, each set including at least one hollowed-out area, and no two sets of hollowed-out areas are connected.
6. The shorts-type disposable absorbent article according to claim 5, characterized in that, Each set of cutout areas includes multiple cutout areas arranged horizontally at intervals, and no two cutout areas are connected.
7. The shorts-type disposable absorbent article according to claim 5, characterized in that, Any one of the cutout areas in each group is located between two adjacent cutout areas in another adjacent group.
8. The shorts-type disposable absorbent article 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 article according to claim 1 or 2, characterized in that, The absorbent article includes a pair of side panels (8) attached to the top layer (5) and arranged opposite each other in the transverse direction, wherein each side panel (8) extends in the longitudinal direction and is configured to be transparent or translucent.
10. The shorts-type disposable absorbent article according to claim 9, characterized in that, The side guard (8) is made of non-woven material that has not been whitened.