Disposable absorbent article
By designing multiple rows of staggered slits and gaps on the core layer of disposable absorbent products, the shortcomings of existing sanitary napkins in terms of fit and comfort are solved, achieving a better fit and user experience during exercise.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KIMBERLY CLARK (CHINA) CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-12
Smart Images
Figure CN224345086U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of personal hygiene care products, and in particular to a disposable absorbent product. Background Technology
[0002] Products such as absorbent fabrics are often used to collect and retain bodily fluids containing, for example, urine, menstrual blood, and / or blood. Comfort, absorbency, and ease of use are three key product attributes and areas of concern for the wearer of such absorbent fabrics.
[0003] Research data shows that Chinese consumers' demand for sanitary napkins that fit well and resist deformation accounts for 24% of the overall demand. Currently, products claiming to fit well and resist deformation only account for 9% of the market share, and the extent to which these functions are achieved needs improvement. Ordinary sanitary napkins present many troublesome problems during wear, the most obvious being their lack of proper fit to the body. When women wear these types of sanitary napkins, they can clearly feel the lack of proper fit when walking or moving, greatly affecting comfort. Furthermore, ordinary sanitary napkins often fail to return to their original shape after being worn for a period of time. This defect directly leads to frequent side leakage problems.
[0004] In recent years, with the increasing health awareness of people, the number of people exercising has shown a significant upward trend. More and more women are actively participating in various sports, whether it's daily running and fitness or engaging in activities such as yoga and dance. During exercise, the large swings and rapid movements of the body place higher demands on the fit and comfort of sanitary napkins. However, most products on the market currently fall short in meeting this need.
[0005] This demonstrates that in the field of hygiene products, especially sanitary napkins, there is still significant room for improvement in terms of fit and comfort. Therefore, it is necessary to propose a disposable absorbent product to address at least some of the aforementioned issues. Utility Model Content
[0006] Therefore, the purpose of this invention is to provide a disposable absorbent article that at least partially overcomes the shortcomings of the prior art.
[0007] This utility model provides a disposable absorbent article having a longitudinal direction along its length, a transverse direction perpendicular to the longitudinal direction, and a thickness direction. In the thickness direction, a surface layer, a core layer, and a water-repellent layer are arranged sequentially from top to bottom. In the longitudinal direction, it is divided into a front absorbent area, a middle absorbent area, and a rear absorbent area from front to back. The core layer has a plurality of regularly arranged vacancy portions that generally extend in the transverse direction to reduce the stiffness of the core layer and to allow the worn disposable absorbent article to fit the wearer. The vacancy portions include at least multiple rows of spaced and staggered first slits, and a plurality of spaced first arc lines are evenly distributed on the first slits.
[0008] In a preferred embodiment, the first slit is evenly arranged in the core layer from front to back in the longitudinal direction, and the first arc protrudes in the longitudinal direction toward the front or rear of the core layer.
[0009] In a preferred embodiment, the vacancy includes multiple rows of spaced and staggered second slits, each second slit having a plurality of spaced second arcs evenly distributed on it. The second arcs protrude longitudinally toward the rear of the core layer, and the first arcs protrude longitudinally toward the front of the core layer. The first slits are arranged in the front absorption region, and the second slits are arranged in the rear absorption region.
[0010] In a preferred embodiment, the vacancy portion includes multiple rows of spaced and staggered first vacancy units, each first vacancy unit having a plurality of intersecting lines evenly distributed on it. These intersecting lines are a plurality of straight lines extending outward from the same starting point, and the plurality of straight lines are evenly distributed around the starting point. Alternatively, the first vacancy unit may have a plurality of first openings evenly distributed on it.
[0011] In a preferred embodiment, the first vacant unit is arranged in the middle absorption region, and / or the rear absorption region includes a first rear absorption region, a second rear absorption region, and a third rear absorption region in the lateral direction from left to right, with the first vacant unit arranged in the second rear absorption region.
[0012] In a preferred embodiment, the first slit is parallel to the transverse direction or the first slit as a whole forms a curve convex toward the front of the core layer, and / or the second slit is parallel to the transverse direction or the second slit as a whole forms a curve convex toward the rear of the core layer.
[0013] In a preferred embodiment, the vacancy portion includes a second vacancy unit located in the middle absorption region. The second vacancy unit includes: a second opening; a first vacancy group, the first vacancy group surrounding the outer periphery of the second opening and including a plurality of uniformly arranged teardrop shapes twisted circumferentially along the second opening; a second vacancy group, the second vacancy group arranged in multiple rows at intervals is located in front of the first vacancy group and generally forms a curve protruding towards the front of the core layer; a plurality of third openings are evenly distributed on the second vacancy group; a third vacancy group, the third vacancy group arranged in multiple rows at intervals is located behind the first vacancy group and generally forms a curve protruding towards the rear of the core layer; a plurality of fourth openings are evenly distributed on the third vacancy group.
[0014] In a preferred embodiment, the teardrop shape has a plurality of fifth openings evenly distributed on it, and the diameter of the fifth openings is set to gradually increase in the direction away from the second opening.
[0015] In a preferred embodiment, the core layer comprises, from top to bottom, an elastic layer and an absorbent and liquid-retaining layer in the thickness direction.
[0016] In a preferred embodiment, the surface layer is a one-piece surface layer or a three-piece surface layer.
[0017] In a preferred embodiment, the core layer further includes a central absorbent layer located between the elastic layer and the absorbent and liquid-retaining layer, and the vacancy is located at least in the elastic layer of the core layer in the thickness direction.
[0018] In a preferred embodiment, if the area of the elastic layer is smaller than the area of the absorbent and liquid-retaining layer, then the vacancy portion does not exceed the outer edge of the elastic layer. Attached Figure Description
[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:
[0020] Figure 1 This is the first embodiment of the disposable absorbent product of this utility model;
[0021] Figure 2 This is the second embodiment of the disposable absorbent product of this utility model;
[0022] Figure 3 This is the third embodiment of the disposable absorbent product of this utility model;
[0023] Figure 4 This is the fourth embodiment of the disposable absorbent product of this utility model;
[0024] Figure 5 This is the fifth embodiment of the disposable absorbent product of this utility model;
[0025] Figure 6 This is the sixth embodiment of the disposable absorbent product of this utility model;
[0026] Figure 7 This is the seventh embodiment of the disposable absorbent product of this utility model;
[0027] Figure 8 This is a cross-sectional structural diagram of the disposable absorbent product of this utility model.
[0028] Explanation of reference numerals in the attached figures
[0029] L - Longitudinal; W - Lateral; H - Thickness direction; 210 - Surface layer; 220 - Core layer; 221 - Elastic layer; 222 - Central absorbent layer; 223 - Absorbent and liquid-retaining layer; 310 - Front absorbent zone; 320 - Middle absorbent zone; 330 - Back absorbent zone; 331 - First back absorbent zone; 332 - Second back absorbent zone; 333 - Third back absorbent zone; 10 - First slit; 11 - First arc; 20 - Second slit; 21 - Second arc; 30 - First vacant unit; 31 - Intersecting line; 32 - First opening; 40 - Second vacant unit; 401 - Second opening; 410 - First vacant group; 411 - Teardrop shape; 412 - Fifth opening; 420 - Second vacant group; 421 - Third opening; 430 - Third vacant group; 431 - Fourth opening. Detailed Implementation
[0030] The present invention will be further described in detail below with reference to specific embodiments. The embodiments given are only for illustrating the present invention and are not intended to limit the scope of the present invention.
[0031] Terminology definition:
[0032] As used herein, the term "absorbent article" 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 excretions from the body. As described herein, such absorbent articles are intended to be discarded after a limited period of use, rather than washed or otherwise restored for reuse. It should be understood that this invention is applicable to a variety of disposable absorbent articles, including but not limited to diapers, training pants, swimming trunks, feminine hygiene products including but not limited to menstrual pads, sanitary napkins, feminine linings, panty liners, and incontinence products, without departing from the scope of this invention.
[0033] The term "disposable" refers to 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). Disposable absorbent articles typically include an adhesive between layers and / or elements to hold the article together (e.g., earpieces, side pieces, and straps are bonded to a base structure via adhesive, and the layers of earpieces, side pieces, straps, and base structure are bonded together using adhesive). Alternatively, thermal bonding and / or pressure bonding may be used in conjunction with or instead of adhesive. In this case, portions of the material layers may become partially melted and pressed together, so that once cooled, they are physically bonded together.
[0034] The terms "vacant section", "vacant group", and "vacant unit" refer to the collective term for structures that are originally a whole solid structure but are divided into parts with vacancies, hollows, or openings by means of materials that alter or remove parts of the solid structure.
[0035] As used herein, the term "spunbond nonwoven fabric" refers to a web comprising substantially continuous fibers of small diameter. These fibers are formed by extruding molten thermoplastic material from capillaries of multiple fine, typically circular, spinnerets having the diameter of the extruded fibers, and then rapidly thinning it by, for example, eductive drawing and / or other well-known spunbonding mechanisms. Preparation of spunbond webs is described and illustrated, for example, in U.S. Patent Nos. 4,340,563 to Appel et al., 3,692,618 to Dorschner et al., 3,802,817 to Matsuki et al., 3,338,992 to Kinney, 3,341,394 to Kinney, 3,502,763 to Hartman, 3,502,538 to Levy, 3,542,615 to Dobo et al., and 5,382,400 to Pike et al., the entire contents of which are incorporated herein by reference for all purposes. Spunbond fibers are generally non-sticky when deposited onto a collection surface. Spunbond fibers can sometimes have a diameter of less than about 40 micrometers and are typically between about 5 and about 20 micrometers.
[0036] As used in this article, the term "hot air nonwoven fabric" refers to a soft and fluffy nonwoven fabric formed by melting and bonding fiber webs (such as polypropylene, ES fibers, etc.) with a high-temperature hot air stream.
[0037] As used herein, the term "perforated film" refers to a polyethylene (PE) or polypropylene (PP) plastic film that has been perforated by mechanical or laser means to form a dense microporous structure.
[0038] As used in this article, the term "polyurethane foam (PU Foam)" is a polymer material made from raw materials such as isocyanates and polyols through a chemical reaction.
[0039] As used herein, the term "high internal phase emulsion foam (HIPE Foam)" is a porous vinyl crosslinked polymer obtained by polymerization of a high internal phase emulsion.
[0040] As used in this article, “Textile” refers to a flexible fibrous assembly made through textile processes such as weaving, knitting, and nonwoven technology.
[0041] As used herein, the terms “superabsorbent polymer,” “superabsorbent,” or “SAP” are used interchangeably and should refer to polymers that can absorb and retain a very large amount of liquid relative to their own mass. Superabsorbent polymers are classified as crosslinkable hydrogels that absorb aqueous solutions through hydrogen bonding and other polar forces with water molecules. The water-absorbing capacity of SAP is based in part on its degree of ionization (a coefficient of ion concentration in aqueous solutions) and the hydrophilic polar functional groups of SAP. SAP is typically produced by the polymerization of acrylic acid with sodium hydroxide in the presence of an initiator to form sodium polyacrylate (sometimes called sodium polyacrylate). Other materials are also used to prepare superabsorbent polymers, such as polyacrylamide copolymers, ethylene-maleic anhydride copolymers, crosslinked carboxymethyl cellulose, polyvinyl alcohol copolymers, crosslinked polyethylene oxide, and starch-grafted copolymers of polyacrylonitrile. SAP can be present in absorbent articles in particulate or fibrous form or as a coating on another material or fiber.
[0042] As used in this article, the term "SAPP" refers to superabsorbent composite paper made using a wet papermaking process.
[0043] As used herein, the term "composite core" refers to an absorbent core made by combining superabsorbent polymer (SAP) with other materials (such as fluff pulp, nonwoven fabric, etc.) through a spunlace nonwoven process.
[0044] As used in this article, the term "SAP-containing composite core" is a multilayer functional absorbent material that combines SAP particles with other materials (such as fluff pulp, nonwoven fabric, elastic membrane, etc.) through physical or chemical means to form a core structure that combines rapid liquid absorption, water retention and leak prevention.
[0045] As used in this article, the term "dry composite core" refers to an absorbent core obtained by layering and composite materials such as fluff pulp, superabsorbent polymer (SAP), and nonwoven fabric using dry molding technology (without liquid binders).
[0046] As used in this article, "elastic film" refers to a polymer film with tensile resilience, typically made from thermoplastic elastomers or polyurethane as the substrate through blown film or casting processes. "PE film" refers to a single-layer or multi-layer film made from polyethylene. "Composite film" refers to a multi-layer film made from multiple materials, such as polyethylene + non-woven fabric or polyethylene + polyethylene terephthalate (PET), bonded together by adhesive or hot pressing.
[0047] As used in this article, "elasticity" refers to a material that tends to maintain its shape in both dry and wet conditions and tends to recover its original shape before compression when subjected to compressive forces and when such forces are removed.
[0048] As used in this article, "core layer front end" refers to the end of a disposable absorbent product located in front of the wearer after wearing, and "core layer rear end" refers to the end of a disposable absorbent product located in back of the wearer after wearing.
[0049] As used herein, “liquid” refers to a substance and / or material that is fluid and capable of filling the interior space of a container and taking the shape of the container. “Liquid connectivity” refers to the ability of a liquid to move from one layer to another or from one location to another within a layer.
[0050] As used herein, the terms “set up” or “have” are used to indicate that one or more elements are located in a particular place or position as part of a macroscopic overall structure with other elements or as a separate element joined to another element.
[0051] As used herein, "longitudinal" and "transverse" have their conventional meanings. The longitudinal axis lies in the plane of the garment when it is laid flat and fully extended, generally parallel to the plane that divides the wearer, who is standing and wearing the garment, into the left and right halves of their body. The transverse axis lies in the plane of the garment that is approximately perpendicular to the longitudinal axis. The garment shown is longer in the longitudinal direction than in the transverse direction.
[0052] Single-use absorbent products:
[0053] Reference Figures 1 to 8This utility model provides a disposable absorbent article having a longitudinal direction L along its length, a transverse direction W perpendicular to the longitudinal direction L, and a thickness direction H. A surface layer 210, a core layer 220, and a water-repellent layer 230 are arranged sequentially from top to bottom in the thickness direction H. Furthermore, the article is divided into a front absorbent region 310, a middle absorbent region 320, and a rear absorbent region 330 from front to back in the longitudinal direction L. The core layer 220 has several regularly arranged slits extending generally along the transverse direction W to reduce the stiffness of the core layer 220 and allow the worn disposable absorbent article to conform to the wearer. Each slit includes at least multiple rows of spaced and staggered first slits 10, each first slit 10 having several spaced first arc lines 11 evenly distributed on it. It is understood that the first arc lines 11 extend generally along the transverse direction W. Generally speaking, the front absorption zone 310 is suitable for wearing facing the front of the wearer, the rear absorption zone 330 is suitable for wearing facing the back of the wearer, and the middle absorption zone 320 is suitable for wearing close to the crotch of the wearer.
[0054] The disposable absorbent product of this invention has multiple vents extending generally laterally. These vents reduce stress in the core layer, making it easier for the core layer to deform under external force, thus better adapting to changes in the wearer's body shape. When worn, the disposable absorbent product conforms to the wearer's body during activities such as walking, running, and exercising. Notably, this disposable absorbent product exhibits excellent resilience in the thickness direction, both longitudinally and laterally, with a recovery rate exceeding 80% after use. Therefore, the disposable absorbent product of this invention meets consumers' demands for a perfect fit and has broad market prospects.
[0055] In one embodiment, the reverse osmosis amount and absorption rate of the disposable absorbent product of this invention are compared with those of the prior art as shown in the table below.
[0056]
[0057] As shown in the table above, the reverse seepage amount and absorption rate of the disposable absorbent product of this invention are superior to those of the disposable absorbent products in the prior art, and it has good absorption, dryness and leak-proof performance.
[0058] In addition, such as Figure 8As shown, the disposable absorbent product includes a surface layer 210, a core layer 220, and a water-repellent layer 230 arranged sequentially from top to bottom in the thickness direction H. The surface layer 210 can be a one-piece or three-piece surface layer. The core layer 220 includes an elastic layer 221 and an absorbent and liquid-retaining layer 223 arranged from top to bottom in the thickness direction H. The three-piece surface layer replaces the traditional single-piece surface layer with three independent areas to improve user experience and functionality. The three independent areas are typically divided into front, middle, and back sections, each ergonomically designed with different functions. The three sections are connected using special processes (such as hot pressing or ultrasonic welding) to ensure a smooth, friction-free surface. Different materials can be used for the three sections. A one-piece surface layer refers to a surface layer with a single-layer structure design. Compared to the three-piece surface layer, it has no partitioned sections and is usually made of a single material, covering the entire surface of the sanitary napkin. Materials with good visibility can be selected as the surface layer 210, such as spunbond nonwoven fabric, hot air nonwoven fabric, or perforated film.
[0059] The elastic layer 221 can be made of polyurethane foam (PU foam), high internal phase emulsion foam (HIPE foam), or textile materials, or other foam materials with good hydrophilicity and softness. The absorbent and liquid-retaining layer 223 can be made of materials such as a core made of SAPP, a hydroentangled composite SAP core, or a dry composite core. The water-repellent layer 230 can be made of elastic membrane, PE membrane, or composite membrane.
[0060] In a preferred embodiment of this invention, a central absorbent layer 222 is provided between the elastic layer 221 and the absorbent and liquid-retaining layer 223. The area of the central absorbent layer 222 is preferably smaller than the area of the elastic layer 221 and / or the absorbent and liquid-retaining layer 223. In other embodiments, the area of the central absorbent layer 222 may be greater than, less than, or equal to the area of the elastic layer 221 and the absorbent and liquid-retaining layer 223. Furthermore, the material of the central absorbent layer 222 may be a core made of SAPP or a composite core containing SAP. It is understood that the vacancy may be the elastic layer 221 located at least within the core layer 220 in the thickness direction H.
[0061] Disposable absorbent products made from the aforementioned materials not only possess excellent liquid absorption properties, ensuring rapid liquid absorption, but also provide a dry and comfortable feel against the skin. Furthermore, they prevent liquid leakage, enhancing the consumer experience.
[0062] The disposable absorbent article of the present invention is described below through several embodiments.
[0063] Example 1
[0064] Reference Figure 1The first slit 10 of the disposable absorbent article is evenly arranged from front to back along the longitudinal direction L of the core layer 220. A plurality of spaced first arc lines 11 are evenly distributed on the first slit 10, and the first arc lines 11 protrude towards the front of the core layer 220 along the longitudinal direction L. It can be understood that, in another embodiment, the first arc lines 11 protrude towards the rear of the core layer 220 along the longitudinal direction L.
[0065] It is worth mentioning that, in this embodiment, the first slit 10 is parallel to the transverse W, and the first arc 11 can be a bracket shape extending in the transverse direction, with the length of the first arc 11 in its extending direction being much greater than its width perpendicular to its extending direction. In this embodiment, the area of the elastic layer 221 is the same as the area of the absorbent and liquid-retaining layer 223. The first arc 11 can cut the entire core layer 220 from top to bottom, or it can cut only the elastic layer 221. Furthermore, in this embodiment, the overall length of the disposable absorbent product can be 240 mm.
[0066] Example 2
[0067] like Figure 2 As shown, in this embodiment, a plurality of rows of spaced and staggered first slits 10 are formed on the disposable absorbent article. The first slits 10 are located in the front absorbent region 310, and a plurality of spaced first arc lines 11 are evenly distributed on the first slits 10. The first arc lines 11 protrude in the longitudinal direction L towards the front of the core layer 220. Furthermore, a plurality of rows of spaced and staggered second slits 20 are also formed on the disposable absorbent article. These second slits 20 are located in the rear absorbent region 330, and a plurality of spaced second arc lines 21 are evenly distributed on the second slits 20. The second arc lines 21 protrude in the longitudinal direction L towards the rear of the core layer 220.
[0068] In addition, such as Figure 2 As shown, in this embodiment, the disposable absorbent article has multiple rows of spaced and staggered first vacant units 30, which are arranged in the middle absorbent region 320. Each first vacant unit 30 has a plurality of intersecting lines 31 evenly distributed on it. Each intersecting line 31 is a plurality of line segments extending outward from the same starting point, wherein the plurality of line segments are evenly arranged around the same intersection point at approximately the same included angle. In one embodiment, the intersecting line 31 may include three straight lines extending outward from the same starting point, with an included angle of 120° between adjacent lines. In other embodiments, each first vacant unit 30 may have a plurality of first openings 32 evenly distributed on it. The first openings 32 are preferably circular holes, and the diameter of the circular holes is preferably 1.5 mm to 5 mm.
[0069] It is understood that the first slit 10, the second slit 20, and the first vacant unit 30 are parallel to the transverse direction W, and the first arc 11 and the second arc 21 can be bracket-shaped, extending in the transverse direction. The length of the first arc 11 and the second arc 21 in their extending direction is much greater than their width perpendicular to their extending direction.
[0070] Furthermore, in this embodiment, the area of the elastic layer 221 is the same as the area of the absorbent and liquid-retaining layer 223. The first arc 11, the second arc 21, and the intersecting line 31 can be used to cut the entire core layer 220 from top to bottom, or only the elastic layer 221 can be cut. Even further, the overall length of the disposable absorbent product can be 210mm, 240mm, or 270mm.
[0071] Example 3
[0072] like Figure 3 As shown, in this embodiment, the disposable absorbent article is divided into a front absorbent region 310, a middle absorbent region 320, and a rear absorbent region 330 from front to back in the longitudinal direction L. The rear absorbent region 330 includes a first rear absorbent region 331, a second rear absorbent region 332, and a third rear absorbent region 333 from left to right in the transverse direction W. In a preferred embodiment, the rear absorbent region 330 is evenly divided into three regions from left to right in the transverse direction W: the first rear absorbent region 331, the second rear absorbent region 332, and the third rear absorbent region 333.
[0073] The front absorption region 310 has multiple rows of spaced and staggered first slits 10, each slit 10 having a plurality of spaced first arcs 11 evenly distributed on it. Each arc 11 protrudes along the longitudinal direction L towards the front of the core layer 220. Furthermore, the middle absorption region 320 has multiple rows of spaced and staggered first vacant units 30, each vacant unit 30 having a plurality of first openings 32 evenly distributed on it. The first openings 32 are preferably circular holes, with a diameter preferably between 1.5 mm and 5 mm. Material within the first openings 32 is removed.
[0074] Furthermore, the first rear absorption region 331 and the third rear absorption region 333 form multiple rows of spaced and staggered second slits 20, and several spaced second arc lines 21 are evenly distributed on the second slits 20, the second arc lines 21 protruding in the longitudinal direction L toward the rear of the core layer 220. Even further, as... Figure 3As shown, the second post-absorption region 332 forms multiple rows of spaced and staggered first vacant units 30. Each first vacant unit 30 has a plurality of intersecting lines 31 evenly distributed on it. Each intersecting line 31 is a plurality of straight lines extending outward from the same starting point, and these straight lines are evenly arranged around the starting point. In one embodiment, the intersecting line 31 may include three straight lines extending outward from the same starting point, with an included angle of 120° between two adjacent lines.
[0075] It is understood that the first slit 10, the second slit 20, and the first vacant unit 30 are parallel to the transverse direction W, and the first arc 11 and the second arc 21 can be bracket-shaped, extending in the transverse direction. The length of the first arc 11 and the second arc 21 in their extending direction is much greater than their width perpendicular to their extending direction.
[0076] In this embodiment, the area of the elastic layer 221 is the same as the area of the absorbent and liquid-retaining layer 223. The first arc 11, the second arc 21, and the intersecting line 31 can be used to cut the entire core layer 220 from top to bottom, or only the elastic layer 221 can be cut. In this embodiment, the overall length of the disposable absorbent product can be 210mm, 240mm, or 270mm.
[0077] Example 4
[0078] like Figure 4 As shown, in this embodiment, the disposable absorbent article is divided into a front absorbent region 310, a middle absorbent region 320, and a rear absorbent region 330 from front to back in the longitudinal direction L. The rear absorbent region 330 includes a first rear absorbent region 331, a second rear absorbent region 332, and a third rear absorbent region 333 from left to right in the transverse direction W. In a preferred embodiment, the rear absorbent region 330 is evenly divided into three regions from left to right in the transverse direction W: the first rear absorbent region 331, the second rear absorbent region 332, and the third rear absorbent region 333.
[0079] The front absorption region 310 has multiple rows of spaced and staggered first slits 10, and several spaced first arc lines 11 are evenly distributed on the first slits 10. The first arc lines 11 protrude in the longitudinal direction L toward the front of the core layer 220.
[0080] Furthermore, a second vacancy unit 40 is formed on the middle absorption region 320. This second vacancy unit 40 includes: a second opening 401; a first vacancy group 410, in which multiple first vacancy groups 410 are evenly arranged around the outer periphery of the second opening 401 and configured as teardrop shapes 411 twisted circumferentially along the second opening 401; a second vacancy group 420, in which multiple rows of spaced second vacancy groups 420 are located above the first vacancy groups 410 and generally form a curve convex towards the front of the core layer 220, with a plurality of third openings 421 evenly distributed on the second vacancy group 420; and a third vacancy group 430, in which multiple rows of spaced third vacancy groups 430 are located behind the first vacancy groups 410 and generally form a curve convex towards the rear of the core layer 220, with a plurality of fourth openings 431 evenly distributed on the third vacancy group 430. The material within the second opening 401, the teardrop shape 411, the third opening 421, and the fourth opening 431 is removed.
[0081] In a preferred embodiment, such as Figure 4 As shown, the teardrop-shaped 411, twisted circumferentially along the second opening 401, resembles a petal shape, and the first empty group 410 resembles a flower shape. Preferably, two rows of second empty groups 420 are arranged at intervals in front of the first empty group 410, and the number of third openings 421 on the second empty groups 420 increases in the direction away from the first empty group 410. Preferably, two rows of third empty groups 430 are arranged at intervals behind the first empty group 410, and the number of fourth openings 431 on the third empty groups 430 increases in the direction away from the first empty group 410.
[0082] Furthermore, the first rear absorption region 331 and the third rear absorption region 333 form multiple rows of spaced and staggered second slits 20, and several spaced second arc lines 21 are evenly distributed on the second slits 20, the second arc lines 21 protruding in the longitudinal direction L toward the rear of the core layer 220. Even further, as... Figure 4 As shown, the second post-absorption region 332 forms multiple rows of spaced and staggered first vacant units 30. Each first vacant unit 30 has a plurality of intersecting lines 31 evenly distributed on it. These intersecting lines 31 are line segments extending outward from the same intersection point, wherein the line segments are evenly arranged around the same intersection point at approximately the same angle. In one embodiment, the intersecting lines 31 may include three straight lines extending outward from the same starting point, with an angle of 120° between two adjacent lines.
[0083] It is understood that the first slit 10, the second slit 20, and the first vacant unit 30 are parallel to the transverse direction W, and the first arc 11 and the second arc 21 can be bracket-shaped, extending in the transverse direction. The length of the first arc 11 and the second arc 21 in their extending direction is much greater than their width perpendicular to their extending direction.
[0084] In this embodiment, the area of the elastic layer 221 is the same as the area of the absorbent and liquid-retaining layer 223. The first arc 11, the second arc 21, and the intersecting line 31 can be used to cut the entire core layer 220 from top to bottom, or only the elastic layer 221 can be cut. In this embodiment, the overall length of the disposable absorbent product can be 210mm, 240mm, or 270mm.
[0085] Example 5
[0086] Unlike Example 4, in this example, as Figure 5 As shown, the teardrop shape 411 has a plurality of fifth openings 412 evenly distributed on it, and the diameter of the fifth opening 412 is set to gradually increase in the direction away from the second opening 401. By providing a plurality of openings in the absorption region 320, the increased area between the liquid and the core layer 220 can be increased, thereby accelerating the absorption of the liquid. In this embodiment, the material in the second opening 401, the third opening 421, the fourth opening 431, and the fifth opening 412 is removed.
[0087] Similarly, in this embodiment, the area of the elastic layer 221 is the same as the area of the absorbent and liquid-retaining layer 223. The first arc 11, the second arc 21, and the intersecting line 31 can be used to cut the entire core layer 220 from top to bottom, or only the elastic layer 221 can be cut. In this embodiment, the overall length of the disposable absorbent product can be 210mm, 240mm, or 270mm.
[0088] Example 6
[0089] Reference Figure 6 The first slit 10 on the disposable absorbent product is evenly arranged from front to back in the longitudinal direction L on the core layer 220. The first slit 10 is evenly distributed with a number of spaced first arc lines 11, which protrude in the longitudinal direction L toward the front of the core layer 220.
[0090] It is understood that in this embodiment, the first slit 10 is parallel to the transverse W, and the first arc 11 can be a bracket-like shape extending in the transverse direction, with the length of the first arc 11 in its extending direction being much greater than its width perpendicular to its extending direction. Furthermore, in this embodiment, the overall length of the disposable absorbent article can be 240 mm.
[0091] Unlike Embodiment 1, in this embodiment, the area of the elastic layer 221 is smaller than the area of the liquid-absorbing and liquid-retaining layer 223, and the first arc 11 only cuts through the elastic layer 221. Thus, the first arc 11 does not extend to the edge of the core layer 220, thereby preventing liquid leakage from the product edge.
[0092] Example 7
[0093] Reference Figure 7 In this embodiment, the disposable absorbent article is divided into a front absorbent region 310, a middle absorbent region 320, and a rear absorbent region 330 from front to back in the longitudinal direction L. The rear absorbent region 330 includes a first rear absorbent region 331, a second rear absorbent region 332, and a third rear absorbent region 333 from left to right in the transverse direction W. In a preferred embodiment, the rear absorbent region 330 is evenly divided into three regions from left to right in the transverse direction W: the first rear absorbent region 331, the second rear absorbent region 332, and the third rear absorbent region 333.
[0094] The front absorption region 310 has multiple rows of spaced and staggered first slits 10, each slit 10 having a plurality of spaced first arcs 11 evenly distributed on it. Each arc 11 protrudes in the longitudinal direction L towards the front of the core layer 220. Furthermore, the middle absorption region 320 has multiple rows of spaced and staggered first vacant units 30, each vacant unit 30 having a plurality of first openings 32 evenly distributed on it. The first openings 32 are preferably circular holes, and the diameter of the circular holes is preferably 1.5 mm to 5 mm. The material within the first openings 32 is removed.
[0095] Furthermore, the first rear absorption region 331 and the third rear absorption region 333 form multiple rows of spaced and staggered second slits 20, and several spaced second arc lines 21 are evenly distributed on the second slits 20, the second arc lines 21 protruding in the longitudinal direction L toward the rear of the core layer 220. Even further, as... Figure 7 As shown, the second post-absorption region 332 forms multiple rows of spaced and staggered first vacant units 30. Each first vacant unit 30 has a plurality of intersecting lines 31 evenly distributed on it. These intersecting lines 31 are line segments extending outward from the same intersection point, wherein the line segments are uniformly arranged around the same intersection point at approximately the same included angle. In one embodiment, the intersecting lines 31 may include three straight lines extending outward from the same starting point, with an included angle of 120° between adjacent lines.
[0096] It is understood that the first slit 10, the second slit 20, and the first vacant unit 30 are parallel to the transverse direction W, and the first arc 11 and the second arc 21 can be bracket-shaped, extending in the transverse direction. The length of the first arc 11 and the second arc 21 in their extending direction is much greater than their width perpendicular to their extending direction.
[0097] Unlike Embodiment 3, in this embodiment, the area of the elastic layer 221 is smaller than the area of the liquid-absorbing and retaining layer 223, and the first arc 11, the second arc 12, and the intersecting line 31 only divide the elastic layer 221. Thus, the first arc 11 and the second arc 12 do not extend to the edge of the core layer 220, thereby preventing liquid leakage from the product edge.
[0098] Preparation method of disposable absorbent products
[0099] This utility model also provides a method for preparing a disposable absorbent article, wherein the disposable absorbent article is the aforementioned disposable absorbent article, comprising the following steps:
[0100] S10. The void portion is formed on the core layer 220;
[0101] S20. Stretch the core layer 220, and composite the surface layer 210 and the water-repellent layer 230 onto the upper and lower sides of the core layer 220 in the stretched state, respectively.
[0102] Furthermore, the preparation method may further include the following steps:
[0103] S11. An opening is formed on the core layer 220;
[0104] S12. Remove the material inside the opening from step S11.
[0105] Steps S11 and S12 can be placed before step S10 or between steps S10 and S20.
[0106] The disposable absorbent product prepared by this method has the same advantages as the disposable absorbent product described above, which will not be repeated here.
[0107] For the sake of brevity and simplicity, any range of values shown in this invention takes into account all values within that range and should be interpreted as supporting any claim enumerating any subrange whose endpoints are all values within the specified range under consideration.
[0108] The dimensions and values disclosed herein should not be construed as strictly limited to the precise numerical values stated. Rather, unless otherwise specified, each such dimension is intended to represent the value and a range of functionally equivalent values around that value. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.
[0109] All documents referenced in the “Detailed Description” section are incorporated herein by reference in the relevant sections; no reference to any document should be construed as an admission that it is prior art concerning this utility model. In the event of any conflict between the meaning or definition of any term in this written document and the meaning or definition of any term in the referenced documents, the meaning or definition assigned to the term in this written document shall prevail.
[0110] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that many other changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the appended claims are intended to cover all such changes and modifications within the scope of the present invention.
[0111] When describing elements of the present invention or their preferred embodiments(s), the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that additional elements may be present in addition to the listed elements. Many modifications and variations may be made to the present invention without departing from the spirit and scope thereof. Therefore, the above embodiments are not intended to limit the scope of the present invention.
Claims
1. A disposable absorbent article having a longitudinal direction (L) along its length, a transverse direction (W) perpendicular to the longitudinal direction (L) and a thickness direction (H), wherein a surface layer (210), a core layer (220) and a water-repellent layer (230) are arranged sequentially from top to bottom in the thickness direction (H), and the article is further divided into a front absorbent region (310), a middle absorbent region (320) and a rear absorbent region (330) from front to back in the longitudinal direction (L), characterized in that, The core layer (220) has a plurality of vacancy portions arranged in a preset pattern and extending generally in the transverse direction (W) to reduce the stiffness of the core layer (220) so that the worn disposable absorbent product can fit the wearer's body. The vacancy portions include at least multiple rows of spaced and staggered first slits (10), and the first slits (10) are evenly distributed with a plurality of spaced first arc lines (11).
2. The disposable absorbent article according to claim 1, characterized in that, The first slit (10) is evenly arranged from front to back in the longitudinal direction (L) of the core layer (220), and the first arc (11) protrudes in the longitudinal direction (L) toward the front or rear of the core layer (220).
3. The disposable absorbent article according to claim 1 or 2, characterized in that, The vacancy includes multiple rows of spaced and staggered second slits (20), each second slit (20) having a number of spaced second arcs (21) evenly distributed on it. The second arcs (21) protrude in the longitudinal direction (L) toward the rear of the core layer (220), while the first arcs (11) protrude in the longitudinal direction (L) toward the front of the core layer (220). The first slit (10) is arranged in the front absorption region (310), and the second slits (20) are arranged in the rear absorption region (330).
4. The disposable absorbent article according to claim 3, characterized in that, The vacancy portion includes multiple rows of spaced and staggered first vacancy units (30), on which a plurality of intersecting lines (31) are evenly distributed. These intersecting lines (31) are a plurality of line segments extending outward from the same intersection point, wherein the plurality of line segments are evenly distributed around the same intersection point at approximately the same included angle. Alternatively, the first vacancy unit (30) is evenly distributed with a plurality of first openings (32).
5. The disposable absorbent article according to claim 4, characterized in that, The first vacant unit (30) is arranged in the middle absorption region (320), and / or the rear absorption region (330) includes a first rear absorption region (331), a second rear absorption region (332) and a third rear absorption region (333) in the transverse direction (W) from left to right, with the first vacant unit (30) arranged in the second rear absorption region (332).
6. The disposable absorbent article according to any one of claims 3 to 5, characterized in that, The first slit (10) is parallel to the transverse (W) or the first slit (10) as a whole is a curve protruding toward the front of the core layer (220), and / or the second slit (20) is parallel to the transverse (W) or the second slit (20) as a whole is a curve protruding toward the rear of the core layer (220).
7. The disposable absorbent article according to claim 6, characterized in that, The vacancy portion includes a second vacancy unit (40) located in the middle absorption region (320), the second vacancy unit (40) comprising: Second opening (401). The first vacancy group (410) surrounds the outer periphery of the second opening (401) and includes a plurality of teardrop-shaped (411) uniformly arranged and twisted circumferentially along the second opening (401). The second vacancy group (420) is arranged in multiple rows at intervals. It is located in front of the first vacancy group (410) and is generally in the shape of a curve protruding towards the front of the core layer (220). Several third openings (421) are evenly distributed on the second vacancy group (420). The third gap group (430), which is arranged in multiple rows at intervals, is located behind the first gap group (410) and is generally in the shape of a curve protruding towards the rear of the core layer (220). Several fourth openings (431) are evenly distributed on the third gap group (430).
8. The disposable absorbent article according to claim 7, characterized in that, The teardrop shape (411) has a plurality of fifth openings (412) evenly distributed on it, and the diameter of the fifth opening (412) is set to gradually increase in the direction away from the second opening (401).
9. The disposable absorbent article according to claim 1, characterized in that, The core layer (220) includes an elastic layer (221) and an absorbent and liquid-retaining layer (223) from top to bottom in the thickness direction (H), and / or the surface layer (210) is a one-piece surface layer or a three-piece surface layer.
10. The disposable absorbent article according to claim 9, characterized in that, The core layer (220) further includes a central absorbent layer (222) located between the elastic layer (221) and the absorbent and liquid-retaining layer (223), the vacancy being located at least in the thickness direction (H) of the elastic layer (221) of the core layer (220), and / or, if the area of the elastic layer (221) is smaller than the area of the absorbent and liquid-retaining layer (223), the vacancy not exceeding the outer edge of the elastic layer (221).