Absorbent article

Abstract

This utility model relates to the field of personal hygiene care products, and more particularly to absorbent articles. The absorbent article includes a core layer having a longitudinal direction along its length, a transverse direction perpendicular to the longitudinal direction, and a thickness direction. Multiple slits are formed on the core layer, the length of which is much greater than its width. These slits are arranged to divide the core layer into a central absorbent area and several absorbent units surrounding this central absorbent area, thereby reducing the stiffness of the absorbent article to no more than 650 gf*cm. Furthermore, the absorbent article exhibits a recovery rate of no less than 80% in the transverse direction, allowing the worn absorbent article to deform under pressure and conform to the wearer's body. When worn, especially during movement, the individual units can move freely and conform to the wearer's body. In addition, the absorbent article of this utility model has good resilience in the thickness direction, longitudinal direction, and transverse direction.

Description

Technical Field

[0001] This utility model relates to the field of personal hygiene care products, and in particular to absorbent products. Background Technology

[0002] In daily life, absorbent items such as sanitary napkins and incontinence pads are essential for many users to ensure quality of life and comfort. Due to their specific functional requirements, these items need to fit snugly against the wearer's groin area. Take sanitary napkins as an example: globally, a large number of women are menstruating, and they rely on them for every aspect of their daily lives. From daily work and study to various sports activities, sanitary napkins need to maintain a stable and comfortable state at all times. Similarly, users of incontinence pads include the elderly, postpartum women, and some people with specific medical conditions; their daily activities also depend on the reliable performance of incontinence pads.

[0003] However, a series of problems arise when these absorbent materials fail to perfectly conform to the wearer's body shape. During menstruation, if a woman's sanitary napkin doesn't conform well to her body shape, it may shift during walking due to body swaying and leg movements, causing the absorbent area to deviate from its correct position and resulting in embarrassing situations like side leakage. When sitting for extended periods, changes in posture alter the shape of the groin area. If the sanitary napkin cannot adapt to this change, it can easily wrinkle, causing friction against the skin, discomfort, and potentially affecting absorbency. For incontinence pad users, the problem of not conforming to the body shape is even more serious. When standing or walking, the shifting of the incontinence pad may prevent timely absorption of urine, causing stains on clothing and causing significant psychological stress and inconvenience. Moreover, prolonged misfitting can lead to skin problems such as redness, itching, and even ulceration, seriously affecting the user's health.

[0004] In conclusion, in the design of absorbent products, providing an absorbent product that can conform to the body and move freely without feeling restrictive is the key to solving many problems in the current use of such products, and is also an inevitable trend to promote industry development and meet user needs. Utility Model Content

[0005] Therefore, the purpose of this invention is to provide an absorbent article that at least partially overcomes the disadvantages of the prior art.

[0006] According to one aspect of the present invention, an absorbent article is provided, the absorbent article comprising a core layer having a longitudinal direction along its length, a transverse direction perpendicular to the longitudinal direction, and a thickness direction, wherein a plurality of slits are formed on the core layer, the length of the slits being much greater than their width, wherein the plurality of slits are arranged to cut the core layer into a central absorbent area and a plurality of absorbent units surrounding the central absorbent area and to reduce the stiffness of the absorbent article to be no higher than 650 gf*cm, and the recovery rate of the absorbent article in the transverse direction is no less than 80%, so that the worn absorbent article can be deformed under pressure to fit the wearer.

[0007] The absorbent article of this invention has multiple slits arranged to divide the core layer into a central absorbent area and several absorbent units surrounding this central absorbent area, resulting in superior stiffness compared to existing technologies. When worn, especially during movement (such as walking, running, or exercising), each unit can move freely and conform to the wearer's body. Furthermore, the absorbent article of this invention exhibits excellent resilience in the thickness direction, longitudinal direction, and transverse direction, with a transverse recovery rate exceeding 80% after use. Therefore, the absorbent article of this invention meets consumers' demand for a perfect fit and has significant market appeal.

[0008] In one embodiment of this utility model, the absorption unit includes: a front absorption unit located in front of the central absorption area and arranged symmetrically with respect to the longitudinal direction; side absorption units located on both sides of the central absorption area and arranged symmetrically with respect to the longitudinal direction; and a rear absorption unit located behind the central absorption area and arranged symmetrically with respect to the longitudinal direction. The central absorption area is connected to the front absorption unit, the side absorption unit, and the rear absorption unit. The front absorption unit of the worn absorbent product can bend upward and conform to the front of the wearer's crotch, the side absorption unit can conform to the wearer's inner thigh, and the rear absorption unit can bend upward and conform to the wearer's buttocks.

[0009] In one embodiment of this utility model, the slit divides the front absorption unit into: a first front absorption region located at the front end of the core layer; a second front absorption region and a third front absorption region, the second front absorption region and the third front absorption region being located on both sides of the first front absorption region, wherein the first front absorption region can be connected to the central absorption region through the second front absorption region and the third front absorption region.

[0010] In one embodiment of this utility model, the slit divides the front absorption unit into: a first front absorption region, which is connected to the central absorption region; a second front absorption region and a third front absorption region, the second front absorption region and the third front absorption region being located on both sides of the first front absorption region, and a plurality of the second front absorption regions and a plurality of the third front absorption regions being continuously arranged along the longitudinal direction.

[0011] In one embodiment of this utility model, the slit divides the rear absorption unit into: a first rear absorption area, which is located at the rear end of the core layer and can conform to the wearer's buttocks and groin area; a second rear absorption area, which is located between the core layer and the first rear absorption area, and a plurality of second rear absorption areas are continuously arranged along the longitudinal direction; and a third rear absorption area, which is located on both sides of the first rear absorption area, wherein the first rear absorption area can be connected to the central absorption area through the second rear absorption area or the first rear absorption area can be connected to the central absorption area in sequence through the third rear absorption area and the second rear absorption area.

[0012] In one embodiment of this utility model, the slit divides the rear absorption unit into: a first rear absorption region, which is connected to the central absorption region; a second rear absorption region and a third rear absorption region, the second rear absorption region and the third rear absorption region being located on both sides of the first rear absorption region; a plurality of second rear absorption regions and a plurality of third rear absorption regions being continuously arranged along the longitudinal direction; the second rear absorption region and the third rear absorption region being able to connect to the central absorption region through the first rear absorption region.

[0013] In one embodiment of the present invention, the front absorption unit is provided with a plurality of arc-shaped first slits protruding toward the front end of the core, so that the front absorption unit is cut into a plurality of regions.

[0014] In one embodiment of this utility model, a plurality of arc-shaped second slits protruding toward the rear end of the core layer are formed on the rear absorption unit, so that the rear absorption unit is cut into a plurality of regions.

[0015] In one embodiment of this utility model, the front absorption unit has a plurality of arc-shaped first slits protruding toward the front end of the core layer, so that the front absorption unit is cut into a plurality of regions. The rear absorption unit has a plurality of arc-shaped second slits protruding toward the longitudinal center of the core layer and a third slit extending obliquely from the longitudinal center of the core layer toward the rear edge of the core layer, so that the rear absorption unit is cut into a plurality of regions. In addition, a fourth slit is formed on the core layer surrounding the first slits, the central absorption region, the second slits and the third slits.

[0016] In one embodiment of the present invention, a plurality of openings are formed on the central absorption region, wherein the opening ratio of the central absorption region is 10% to 35%.

[0017] In one embodiment of this utility model, the width of the slit does not exceed 3mm.

[0018] In one embodiment of this utility model, the distance between the two intermittently arranged slits is 2mm to 25mm.

[0019] In one embodiment of this utility model, the distance between two spaced slits is 2mm to 25mm.

[0020] In one embodiment of this utility model, the absorbent article includes a surface layer, a core layer, and a water-repellent layer from top to bottom in the thickness direction H. The surface layer is a one-piece surface layer or a three-piece surface layer. The core layer includes an elastic layer and an absorbent and liquid-retaining layer from top to bottom in the thickness direction. The absorbent article has a printed pattern, which is at least consistent with the projection of the slit in the thickness direction, or the pattern surrounds the projection of the slit in the thickness direction.

[0021] In one embodiment of this utility model, a central absorbent layer is provided between the elastic layer and the absorbent and liquid-retaining layer.

[0022] In one embodiment of this utility model, the slit cuts at least one of the core layers from top to bottom.

[0023] This utility model also provides a method for preparing an absorbent product, wherein the absorbent product is the above-mentioned absorbent product, comprising the following steps:

[0024] S1. The slit is formed on the core layer using a rolling cutter, an ultrasonic cutter, or a wire cutting device;

[0025] S2. Use a vacuum suction device to remove the material cut in the above steps;

[0026] S3. Use a vacuum moving device or a belt clamping device to move the cut core layer so that it is combined with the surface layer and the water-repellent layer.

[0027] Other features and advantages of this invention will partly be 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

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0029] Figure 1This is the first embodiment of the absorbent article in this utility model;

[0030] Figure 2 This is the second embodiment of the absorbent article in this utility model;

[0031] Figure 3 This is the third embodiment of the absorbent article in this utility model;

[0032] Figure 4 This is the fourth embodiment of the absorbent article in this utility model;

[0033] Figure 5 This is the fifth embodiment of the absorbent article in this utility model;

[0034] Figure 6 This is a cross-sectional structural diagram of the absorbent article in this utility model;

[0035] Figure 7 This is one embodiment of printing patterns on the surface layer of the absorbent article in this utility model;

[0036] Figure 8 This is another embodiment of the printing of patterns on the surface layer of the absorbent article in this utility model.

[0037] Explanation of reference numerals in the attached figures

[0038] 10-Central absorption area; 11-Opening; 20-Front absorption unit; 21-First front absorption area; 22-Second front absorption area; 23-Third front absorption area; 30-Side absorption unit; 40-Rear absorption unit; 41-First rear absorption area; 42-Second rear absorption area; 43-Third rear absorption area; 100-Slit; 101-First slit; 102-First slit; 103-Third slit; 104-Fourth slit; 210-Surface layer; 211-Printed pattern; 220-Core layer; 221-Elastic layer; 222-Central absorption layer; 223-Absorbent and liquid-retaining layer; 230-Water-repellent layer; L-Longitudinal; W-Transverse; H-Thickness direction. Detailed Implementation

[0039] 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.

[0040] Terminology definition:

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] As used in this article, “Textile” refers to a flexible fibrous assembly made through textile processes such as weaving, knitting, and nonwoven technology.

[0048] 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.

[0049] As used in this article, the term "SAPP" refers to superabsorbent composite paper made by using a wet papermaking composite process.

[0050] 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.

[0051] 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.

[0052] 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).

[0053] 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.

[0054] As used in this article, "elastic material" 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.

[0055] As used in this article, "core layer front end" refers to the end of the absorbent material located in front of the wearer after wearing, and "core layer rear end" refers to the end of the absorbent material located behind the wearer after wearing.

[0056] 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.

[0057] 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.

[0058] As used in this article, "open area ratio" refers to the ratio of the open area to the total area of ​​the central absorption zone material in the central absorption zone.

[0059] As used in this article, "two slits arranged discontinuously" refers to two adjacent slits whose extension directions largely overlap.

[0060] As used in this article, "two slits spaced apart" refers to two adjacent slits that extend in roughly parallel directions.

[0061] Absorbent products:

[0062] This utility model provides an absorbent article, which includes a core layer 220 and has a longitudinal direction L along the length direction, a transverse direction W perpendicular to the longitudinal direction L, and a thickness direction H. Multiple slits 100 are formed on the core layer 220, and the length of the slits 100 is much greater than its width. The multiple slits 100 are arranged to cut the core layer 220 into a central absorbent area 10 and a number of absorbent units surrounding the central absorbent area 10, and are used to reduce the stiffness of the absorbent article so that it does not exceed 650 gf*cm. The recovery rate of the absorbent article in the transverse direction W is not less than 80%, so that the worn absorbent article can be deformed under pressure to fit the wearer.

[0063] The phrase "the length of slit 100 is much greater than its width" means that the length of slit 100 in its extension direction is much greater than its width perpendicular to the extension direction.

[0064] The absorbent article of this invention has multiple slits 100 arranged to divide the core layer 220 into a central absorbent region 10 and several absorbent units surrounding the central absorbent region 10, resulting in a higher stiffness than existing technologies. When worn, especially during movement (such as walking, running, exercising), each unit can move freely and conform to the wearer's body. Furthermore, the absorbent article of this invention exhibits excellent resilience in the thickness direction, longitudinal direction, and transverse direction, with a transverse recovery rate exceeding 80% after use. Therefore, the absorbent article of this invention meets consumers' demand for a close fit and has significant market appeal.

[0065] In the testing process of the stiffness and recovery rate of the absorbent product, the sample to be tested is first placed on the testing equipment, and the initial width W0 of the sample is measured. Then, the testing equipment compresses the sample in the transverse direction of the absorbent product according to a predetermined frequency, speed, acceleration, number of times, and force value. During the compression process, the testing equipment can read the reaction force of the sample, thereby calculating the stiffness of the sample in the dry state. Then, a few milliliters of solution are injected into the center of the sample, and after standing for a period of time, the sample is again compressed in the transverse direction of the absorbent product according to the predetermined frequency, speed, acceleration, number of times, and force value to obtain the stiffness of the sample in the wet state. The above parameters in the two compression processes can be the same or different. The width W1 of the compressed sample is measured, and W1 / W0 is the recovery rate of the product in the width direction. In one embodiment, the initial width W0 is 76 mm, the width W1 after compression is 66 mm, and the product recovery rate is approximately 86.84%.

[0066] In one embodiment, the reverse osmosis amount and absorption rate of the absorbent product of this invention are compared with those of the prior art as shown in the table below.

[0067] As shown in the table above, the reverse seepage amount and absorption rate of the absorbent product in this invention are superior to those of the absorbent products in the prior art, and it has good absorption, dryness and leak-proof performance.

[0068] In addition, such as Figure 6 As shown, the absorbent material comprises a surface layer 210, a core layer 220, and a water-repellent layer 230, arranged from top to bottom in the thickness direction H. The surface layer 210 can be a one-piece or a 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. These 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.

[0069] The elastic layer 221 can be made of polyurethane foam (PU foam), high internal phase emulsion foam (HIPE foam), textile materials, or other foam materials with good hydrophilicity and softness. The absorbent and liquid-retaining layer 223 can be made of a core produced using SAPP, a composite core, or a dry composite core, etc. The water-repellent layer 230 can be made of elastic membrane, PE membrane, or composite membrane, etc.

[0070] 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 smaller than the area of ​​the elastic layer 221 and / or the absorbent and liquid-retaining layer 223. The central absorbent layer 222 can be a core made using SAPP or a composite core containing SAP.

[0071] 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 leaks, enhancing the consumer experience.

[0072] In this invention, the slit 100 cuts the entire core layer 220 from top to bottom, or cuts only the elastic layer 221, so that the liquid can communicate in the absorbent and liquid-retaining layer 223 or the central absorbent layer 222.

[0073] Reference Figure 7 To ensure that consumers can clearly see the shape and outline of the slit 100, the absorbent article has a printed pattern 211. This printed pattern 211 at least coincides with the projection of the slit 100 in the thickness direction H. In other words, the printed pattern 211 may also include portions other than the portion coinciding with the projection of the slit 100, such as decorative portions. In another embodiment, such as... Figure 8 As shown, the pattern 211 surrounds the projection of the slit 100 in the thickness direction H. In a preferred embodiment, the printed pattern 211 is formed on the surface of the surface layer 210 facing the core layer 220. In another embodiment, the printed pattern 211 may be formed on the surface of the core layer 220 facing the surface layer 210.

[0074] The absorbent articles of this utility model are described below through several embodiments.

[0075] Example 1

[0076] like Figure 1 As shown, the absorption unit includes a front absorption unit 20, a side absorption unit 30, and a rear absorption unit 40. The front absorption unit 20 is located in front of the central absorption area 10 and arranged symmetrically with respect to the longitudinal direction L. The side absorption units 30 are located on either side of the central absorption area 10 laterally (W) and arranged symmetrically with respect to the longitudinal direction L. The rear absorption unit 40 is located behind the central absorption area 10 and arranged symmetrically with respect to the longitudinal direction L. The central absorption area 10 is connected to the front absorption unit 20, the side absorption unit 30, and the rear absorption unit 40. Generally, the front absorption unit 20 is suitable for wearing facing the front of the wearer, the rear absorption unit 40 is suitable for wearing facing the back of the wearer, and the central absorption area 10 is suitable for wearing close to the wearer's crotch. When worn, the front absorption unit 20 can bend upwards and conform to the front of the wearer's crotch, the side absorption unit 30 can conform to the inner thigh of the wearer, and the rear absorption unit 40 can bend upwards and conform to the wearer's buttocks.

[0077] Furthermore, the slit 100 divides the front absorption unit 20 into: a first front absorption region 21, a second front absorption region 22, and a third front absorption region 23. The first front absorption region 21 is located at the front end of the core layer 220, and the second front absorption region 22 and the third front absorption region 23 are located on both sides of the first front absorption region 21. The first front absorption region 21 can be connected to the central absorption region 10 through the second front absorption region 22 and the third front absorption region 23. Additionally, the slit 100 divides the rear absorption unit 40 into: a first rear absorption region 41, located at the rear end of the core layer 220 and conforming to the wearer's buttocks / groin area; a second rear absorption region 42, located between the central absorption region 10 and the first rear absorption region 41, with several second rear absorption regions 42 continuously arranged along the longitudinal direction L; and a third rear absorption region 43, located on both sides of the first rear absorption region 41. The first rear absorption region 43 can be connected to the central absorption region 10 through the second rear absorption region 42.

[0078] In this embodiment, the first rear absorption region 21 is generally U-shaped with its opening facing the front end of the absorbent article, the first rear absorption region 41 is generally U-shaped with its opening facing the rear end of the absorbent article, and the side absorption unit 30 is generally trapezoidal.

[0079] like Figure 1 As shown, slit 100 can be a closed curve with the start and end points coinciding, or slit 100 can be enclosed by the edge of core layer 220 to form a closed shape.

[0080] In this embodiment, the slit 100 can cut the entire core layer 220 in the thickness direction H and remove the material within the slit 100. To increase the contact area between the core layer 220 and the liquid and accelerate liquid absorption, a plurality of openings 11 can be formed in the central absorption region 10. These openings 11 are preferably circular holes with a diameter of 1.5 mm to 5 mm. The porosity of the central absorption region 10 is 10% to 35%, preferably 10% to 30%, and more preferably 15% to 25%. To ensure the connectivity of the core layer 220, a portion of the core layer material is retained between each unit to allow the liquid to flow between the unit regions. In one embodiment, such as... Figure 1 As shown, the distance between two discontinuously arranged slits 100, that is, the distance between the end point of the first slit and the starting point of the second slit in two slits extending in substantially the same direction, is 2mm to 25mm; the distance between two spaced-apart slits 100 is 2mm to 25mm. In this embodiment, the overall length of the absorbent article is 240mm.

[0081] Example 2

[0082] like Figure 2As shown, the absorption unit includes a front absorption unit 20, a side absorption unit 30, and a rear absorption unit 40. The front absorption unit 20 is located in front of the central absorption area 10 and arranged symmetrically with respect to the longitudinal direction L. The side absorption units 30 are located on either side of the central absorption area 10 laterally (W) and arranged symmetrically with respect to the longitudinal direction L. The rear absorption unit 40 is located behind the central absorption area 10 and arranged symmetrically with respect to the longitudinal direction L. The central absorption area 10 is connected to the front absorption unit 20, the side absorption unit 30, and the rear absorption unit 40. Generally, the front absorption unit 20 is suitable for wearing facing the front of the wearer, the rear absorption unit 40 is suitable for wearing facing the back of the wearer, and the central absorption area 10 is suitable for wearing close to the wearer's crotch. When worn, the front absorption unit 20 can bend upwards and conform to the front of the wearer's crotch, the side absorption unit 30 can conform to the inner thigh of the wearer, and the rear absorption unit 40 can bend upwards and conform to the wearer's buttocks.

[0083] Furthermore, the slit 100 divides the front absorption unit 20 into: a first front absorption region 21, a second front absorption region 22, and a third front absorption region 23. The first front absorption region 21 is connected to the central absorption region 10. The second front absorption regions 22 and the third front absorption regions 23 are located on both sides of the first front absorption region 21, and a plurality of the second front absorption regions 22 and the third front absorption regions 23 are continuously arranged along the longitudinal direction L. Additionally, the slit 100 divides the rear absorption unit 40 into: a first rear absorption region 41, which is connected to the central absorption region 10; a second rear absorption region 42 and a third rear absorption region 43, which are located on both sides of the first rear absorption region 41. A plurality of the second rear absorption regions 42 and the third rear absorption regions 43 are continuously arranged along the longitudinal direction L, and the second rear absorption regions 42 and the third rear absorption regions 43 can be connected to the central absorption region 10 through the first rear absorption region 41.

[0084] In this embodiment, the first front absorption region 21 and the first rear absorption region 41 are generally rectangular, and the second front absorption region 22, the third front absorption region 23, the second rear absorption region 42 and the third rear absorption region 43 are generally fan-shaped.

[0085] Specifically, the slit 100 on the front absorption unit 20 is preferably an arc shape protruding toward the front end of the core layer 220, so that the front absorption unit 20 is cut into several regions, and the slit 100 on the rear absorption unit 40 is preferably an arc shape protruding toward the rear end of the core layer 220, so that the rear absorption unit 40 is cut into several regions.

[0086] In this embodiment, the slit 100 can cut the entire core layer 220 in the thickness direction H, or only cut the elastic layer 221. To increase the contact area between the core layer 220 and the liquid and accelerate liquid absorption, a plurality of openings 11 can be formed in the central absorption region 10. These openings 11 are preferably circular, with a diameter of 1.5 mm to 5 mm. The porosity of the central absorption region 10 is 10% to 35%, preferably 10% to 30%, and more preferably 15% to 25%. To ensure the connectivity of the core layer 220, a portion of the core layer material is retained between each unit, allowing the liquid to flow between the unit regions. In one embodiment, such as... Figure 2 As shown, the distance between two discontinuously arranged slits 100, that is, the distance between the end point of the first slit and the starting point of the second slit in two slits extending in substantially the same direction, is 2mm to 25mm; the distance between two spaced-apart slits 100 is 2mm to 25mm. Specifically, the width of the first front absorption region 21 and the first rear absorption region 41 in the transverse direction W can be 2mm to 15mm. In this embodiment, the overall length of the absorbent article is 210mm, 240mm, or 270mm.

[0087] Example 3

[0088] like Figure 3 As shown, the absorption unit includes a front absorption unit 20, a side absorption unit 30, and a rear absorption unit 40. The front absorption unit 20 is located in front of the central absorption area 10 and arranged symmetrically with respect to the longitudinal direction L. The side absorption units 30 are located on either side of the central absorption area 10 laterally (W) and arranged symmetrically with respect to the longitudinal direction L. The rear absorption unit 40 is located behind the central absorption area 10 and arranged symmetrically with respect to the longitudinal direction L. The central absorption area 10 is connected to the front absorption unit 20, the side absorption unit 30, and the rear absorption unit 40. Generally, the front absorption unit 20 is suitable for wearing facing the front of the wearer, the rear absorption unit 40 is suitable for wearing facing the back of the wearer, and the central absorption area 10 is suitable for wearing close to the wearer's crotch. When worn, the front absorption unit 20 can bend upwards and conform to the front of the wearer's crotch, the side absorption unit 30 can conform to the inner thigh of the wearer, and the rear absorption unit 40 can bend upwards and conform to the wearer's buttocks.

[0089] Furthermore, the slit 100 divides the front absorption unit 20 into: a first front absorption region 21, a second front absorption region 22, and a third front absorption region 23. The first front absorption region 21 is located at the front end of the core layer 220, and the second front absorption region 22 and the third front absorption region 23 are located on both sides of the first front absorption region 21, wherein the first front absorption region 21 can be connected to the central absorption region 10 through the second front absorption region 22 and the third front absorption region 23. Furthermore, the slit 100 divides the rear absorption unit 40 into: a first rear absorption area 41, which is located at the rear end of the core layer 220 and can conform to the wearer's buttock groin area; a second rear absorption area 42, which is located between the central absorption area 10 and the first rear absorption area 41, and a plurality of second rear absorption areas 42 are continuously arranged along the longitudinal direction L; and a third rear absorption area 43, which is located on both sides of the first rear absorption area 41, wherein the first rear absorption area 41 can be connected to the central absorption area 10 in sequence through the third rear absorption area 43 and the second rear absorption area 42.

[0090] In this embodiment, the first rear absorption region 21 is generally U-shaped with its opening facing the front end of the absorbent article, the first rear absorption region 41 is generally U-shaped with its opening facing the rear end of the absorbent article, and the side absorption unit 30 is generally trapezoidal.

[0091] like Figure 3 As shown, slit 100 can be a closed curve with the start and end points coinciding, or slit 100 can be enclosed by the edge of core layer 220 to form a closed shape.

[0092] In this embodiment, the slit 100 can cut the entire core layer 220 in the thickness direction H and remove the material within the slit 100. To increase the contact area between the core layer 220 and the liquid and accelerate liquid absorption, a plurality of circular holes 11 can be formed in the central absorption region 10. The diameter of the circular holes can be 1.5 mm to 5 mm, and the porosity of the central absorption region 10 is 10% to 35%, preferably 10% to 30%, and more preferably 15% to 25%. To ensure the connectivity of the core layer 220, a portion of the core layer material is retained between each unit so that the liquid can flow between the unit regions. In one embodiment, such as Figure 3 As shown, the distance between two discontinuously arranged slits 100, that is, the distance between the end point of the first slit and the starting point of the second slit in two slits extending in substantially the same direction, is 2mm to 25mm; the distance between two spaced-apart slits 100 is 2mm to 25mm. In this embodiment, the overall length of the absorbent article is 270mm.

[0093] Example 4

[0094] Reference Figure 4 The absorbent unit includes a front absorbent unit 20, a side absorbent unit 30, and a rear absorbent unit 40. The front absorbent unit 20 is located in front of the central absorbent area 10 and arranged symmetrically with respect to the longitudinal direction L. The side absorbent units 30 are located on either side of the central absorbent area 10 laterally W and arranged symmetrically with respect to the longitudinal direction L. The rear absorbent unit 40 is located behind the central absorbent area 10 and arranged symmetrically with respect to the longitudinal direction L. The central absorbent area 10 is connected to the front absorbent unit 20, the side absorbent unit 30, and the rear absorbent unit 40. Generally, the front absorbent unit 20 is suitable for wearing facing the front of the wearer, the rear absorbent unit 40 is suitable for wearing facing the back of the wearer, and the central absorbent area 10 is suitable for wearing close to the wearer's crotch. When worn, the front absorbent unit 20 can bend upwards and conform to the front of the wearer's crotch, the side absorbent units 30 can conform to the inner thigh of the wearer, and the rear absorbent unit 40 can bend upwards and conform to the wearer's buttocks.

[0095] Specifically, the front absorption unit 20 has a plurality of arc-shaped first slits 101 protruding toward the front end of the core layer 220, so that the front absorption unit 20 is cut into a plurality of regions. The rear absorption unit 40 has a plurality of arc-shaped second slits 102 protruding toward the longitudinal center of the core layer 220 and a third slit 103 extending obliquely from the longitudinal center of the core layer 220 toward the rear edge of the core layer 220, so that the rear absorption unit 40 is cut into a plurality of regions.

[0096] In addition, a fourth slit 104 is formed on the core layer 220 surrounding the first slit 101, the central absorption area 10, the second slit 102 and the third slit 103, wherein the area formed by the third slit 103 and the fourth slit 104 can fit the wearer's buttocks and groin area after being worn.

[0097] In this embodiment, to ensure the connectivity of the core layer 220, the slit 100 can cut only the elastic layer 221 in the thickness direction H without removing the material within the slit 100. To increase the contact area between the core layer 220 and the liquid and accelerate liquid absorption, a plurality of openings 11 can be formed in the central absorption region 10. These openings 11 are preferably circular holes with a diameter of 1.5 mm to 5 mm. The porosity of the central absorption region 10 is 10% to 35%, preferably 10% to 30%, and more preferably 15% to 25%. In this embodiment, the first slit 101, the second slit 102, the third slit 103, and the fourth slit 104 are continuous straight lines or curves. In one embodiment, such as... Figure 4As shown, the distance between the two spaced slits 100 is 2 mm to 25 mm. In this embodiment, the overall length of the absorbent article can be 210 mm, 240 mm, or 270 mm.

[0098] Example 5

[0099] Reference Figure 5 The absorbent unit includes a front absorbent unit 20, a side absorbent unit 30, and a rear absorbent unit 40. The front absorbent unit 20 is located in front of the central absorbent area 10 and arranged symmetrically with respect to the longitudinal direction L. The side absorbent units 30 are located on either side of the central absorbent area 10 laterally W and arranged symmetrically with respect to the longitudinal direction L. The rear absorbent unit 40 is located behind the central absorbent area 10 and arranged symmetrically with respect to the longitudinal direction L. The central absorbent area 10 is connected to the front absorbent unit 20, the side absorbent unit 30, and the rear absorbent unit 40. Generally, the front absorbent unit 20 is suitable for wearing facing the front of the wearer, the rear absorbent unit 40 is suitable for wearing facing the back of the wearer, and the central absorbent area 10 is suitable for wearing close to the wearer's crotch. When worn, the front absorbent unit 20 can bend upwards and conform to the front of the wearer's crotch, the side absorbent units 30 can conform to the inner thigh of the wearer, and the rear absorbent unit 40 can bend upwards and conform to the wearer's buttocks.

[0100] Specifically, the front absorption unit 20 has a plurality of arc-shaped first slits 101 protruding toward the front end of the core layer 220, so that the front absorption unit 20 is cut into a plurality of regions. The rear absorption unit 40 has a plurality of arc-shaped second slits 102 protruding toward the longitudinal center of the core layer 220 and a third slit 103 extending obliquely from the longitudinal center of the core layer 220 toward the rear edge of the core layer 220, so that the rear absorption unit 40 is cut into a plurality of regions.

[0101] In addition, a fourth slit 104 is formed on the core layer 220 surrounding the first slit 101, the central absorption area 10, the second slit 102 and the third slit 103, wherein the area formed by the third slit 103 and the fourth slit 104 can fit the wearer's buttocks and groin area after being worn.

[0102] In this embodiment, to ensure the connectivity of the core layer 220, the slit 100 can cut only the elastic layer 221 in the thickness direction H without removing the material within the slit 100. To increase the contact area between the core layer 220 and the liquid and accelerate liquid absorption, a plurality of openings 11 can be formed in the central absorption region 10. These openings are preferably circular holes with a diameter of 1.5 mm to 5 mm, and the porosity of the central absorption region 10 is 10% to 35%, preferably 10% to 30%, and more preferably 15% to 25%. Unlike embodiment 4, in this embodiment, the first slit 101, the second slit 102, the third slit 103, and the fourth slit 104 are discontinuous straight lines or curves. In one embodiment, such as... Figure 5 As shown, the distance between the two discontinuously arranged slits 100, that is, the distance between the end point of the first slit and the starting point of the second slit in two slits extending in substantially the same direction, is 2 mm to 25 mm. In this embodiment, the overall length of the absorbent article can be 210 mm, 240 mm, or 270 mm.

[0103] Preparation method of absorbent products

[0104] This utility model also provides a method for preparing an absorbent product, wherein the absorbent product is the above-mentioned absorbent product, comprising the following steps:

[0105] S1. The slit 100 is formed on the core layer 220 using a rolling cutter device, an ultrasonic cutter device, or a wire cutting device;

[0106] S2. Use a vacuum suction device to remove the material cut in the above steps;

[0107] S3. Use a vacuum moving device or a belt clamping device to move the cut core layer so that it is combined with the surface layer and the water-repellent layer.

[0108] The preparation method may further include: S4. forming a printed pattern 211 between the surface layer 210 and the core layer 220, wherein the printed pattern 211 is at least consistent with the projection of the slit 100 in the thickness direction H, or the pattern 211 surrounds the projection of the slit 100 in the thickness direction H.

[0109] The absorbent product prepared by this method has the same advantages as the absorbent products described above, which will not be repeated here.

[0110] 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.

[0111] 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”.

[0112] 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.

[0113] 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.

[0114] 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. An absorbent article comprising a core layer (220) having a longitudinal direction (L) along its length, a transverse direction (W) perpendicular to the longitudinal direction (L), and a thickness direction (H), characterized in that, Multiple slits (100) are formed on the core layer (220), the length of the slits (100) being much greater than their width. The multiple slits (100) are arranged to cut the core layer into a central absorption area (10) and a number of absorption units surrounding the central absorption area (10) and to reduce the stiffness of the absorbent article to no more than 650 gf*cm. The absorbent article has a recovery rate of no less than 80% in the transverse (W) direction, so that the worn absorbent article can be deformed under pressure to fit the wearer.

2. The absorbent article according to claim 1, characterized in that, The absorption unit includes: The front absorption unit (20) is located in front of the central absorption region (10) and is arranged symmetrically about the longitudinal direction (L). Side absorption units (30) are located on both sides of the central absorption region (10) in the transverse direction (W) and are arranged symmetrically with the longitudinal direction (L) as the axis. The rear absorption unit (40) is located behind the central absorption region (10) and arranged symmetrically about the longitudinal direction (L). The central absorption area (10) is connected to the front absorption unit (20), the side absorption unit (30) and the rear absorption unit (40) respectively. The front absorption unit (20) of the worn absorbent product can bend upward and fit the front of the wearer's crotch, the side absorption unit (30) can fit the inside of the wearer's thigh, and the rear absorption unit (40) can bend upward and fit the wearer's buttocks.

3. The absorbent article according to claim 2, characterized in that, The slit (100) cuts the front absorption unit (20) into: The first front absorption region (21) is located at the front end of the core layer (220); The second pre-absorption region (22) and the third pre-absorption region (23) are located on opposite sides of the first pre-absorption region (21), respectively. The first front absorption region (21) can be connected to the central absorption region (10) through the second front absorption region (22) and the third front absorption region (23).

4. The absorbent article according to claim 2, characterized in that, The slit (100) cuts the front absorption unit (20) into: The first front absorption region (21) is connected to the central absorption region (10); The second front absorption region (22) and the third front absorption region (23) are located on both sides of the first front absorption region (21), and a plurality of the second front absorption regions (22) and a plurality of the third front absorption regions (23) are arranged continuously along the longitudinal direction (L).

5. The absorbent article according to claim 2, characterized in that, The slit (100) cuts the rear absorption unit (40) into: The first rear absorption area (41) is located at the rear end of the core layer (220) and can conform to the buttock groin area of ​​the wearer; The second post-absorption region (42) is located between the central absorption region (10) and the first post-absorption region (41), and a plurality of the second post-absorption regions (42) are arranged continuously along the longitudinal direction (L); The third post-absorption region (43) is located on both sides of the first post-absorption region (41), wherein, The first post-absorption region (41) can be connected to the central absorption region (10) through the second post-absorption region (42), or the first post-absorption region (41) can be connected to the central absorption region (10) in sequence through the third post-absorption region (43) and the second post-absorption region (42).

6. The absorbent article according to claim 2, characterized in that, The slit (100) cuts the rear absorption unit (40) into: The first post-absorption region (41) is connected to the central absorption region (10); The second post-absorption region (42) and the third post-absorption region (43) are located on both sides of the first post-absorption region (41), and a plurality of the second post-absorption regions (42) and the plurality of the third post-absorption regions (43) are continuously arranged along the longitudinal direction (L). The second post-absorption region (42) and the third post-absorption region (43) can be connected to the central absorption region (10) through the first post-absorption region (41).

7. The absorbent article according to claim 2, characterized in that, The front absorption unit (20) has a plurality of arc-shaped first slits (101) protruding toward the front end of the core layer (220), so that the front absorption unit (20) is cut into a plurality of regions, and / or, The rear absorption unit (40) has a plurality of arc-shaped second slits (102) protruding toward the rear end of the core layer (220) so that the rear absorption unit (40) is cut into a plurality of regions.

8. The absorbent article according to claim 2, characterized in that, The front absorption unit (20) has a plurality of arc-shaped first slits (101) protruding toward the front end of the core layer (220) so that the front absorption unit (20) is cut into a plurality of regions. The rear absorption unit (40) has a plurality of arc-shaped second slits (102) protruding toward the longitudinal center of the core layer (220) and a third slit (103) extending obliquely from the longitudinal center of the core layer (220) toward the lower edge of the core layer (220), so that the rear absorption unit (40) is divided into a plurality of regions. In addition, a fourth slit (104) is formed on the core layer (220) surrounding the first slit (101), the central absorption region (10), the second slit (102), and the third slit (103).

9. The absorbent article according to claim 1, characterized in that, A plurality of openings (11) are formed on the central absorption region (10), wherein the opening ratio of the central absorption region (10) is 10% to 35%, and / or, The width of the slit (100) does not exceed 3 mm, and / or, The distance between two slits (100) arranged intermittently or at intervals is 2 mm to 25 mm.

10. The absorbent article according to any one of claims 1 to 9, characterized in that, The absorbent material comprises a surface layer (210), a core layer (220), and a water-repellent layer (230) arranged from top to bottom in the thickness direction (H). The surface layer (210) is a one-piece or three-piece surface layer. The core layer (220) comprises an elastic layer (221) and an absorbent and liquid-retaining layer (223) arranged from top to bottom in the thickness direction (H). The absorbent article has a printed pattern (211) that is at least consistent with the projection of the slit (100) in the thickness direction (H), or the pattern (211) surrounds the projection of the slit (100) in the thickness direction (H).

11. The absorbent article according to claim 10, characterized in that, A central absorbent layer (222) is provided between the elastic layer (221) and the absorbent and liquid-retaining layer (223), and / or, the slit (100) cuts at least one of the core layers (220) in the thickness direction (H).

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