Absorption core and absorption product with same

Abstract

The utility model relates to an absorption core and an absorption product with the same. The absorption core is used for the absorption product, has a longitudinal direction along the length, a transverse direction perpendicular to the longitudinal direction and a thickness direction, and is characterized in that the absorption core comprises a core body, and side blocking structures protruding in the thickness direction are formed on the two opposite sides of the absorption core in the transverse direction respectively; the side blocking structure extends in the longitudinal direction and is composed of at least one of side protrusions formed on the two opposite sides of the core body in the transverse direction and side blocking structures formed on the two opposite sides of the core body in the transverse direction. The barrier layers are attached to the two transversely opposite sides of the core body and protrude out of the core body in the thickness direction.

Description

Technical Field

[0001] The utility model relates to the technical field of personal hygiene care products, in particular to an absorbent core and an absorbent product having the same. Background Art

[0002] Disposable personal care products, or absorbent articles, such as sanitary napkins, panty liners, diapers, training pants, etc., are usually used to collect and retain body excretions. Absorbency, comfort and fit are three important attributes of the product, and are also the aspects that users pay more attention to. Generally, users are more interested in whether such products are sufficient to absorb a large amount of body excretions without leakage, so as not to stain the wearer's clothes or bed sheets, etc., and without sacrificing the comfort of the product.

[0003] It has been found that a problem with absorbent products is that when the user's activity level or range of motion during the day causes the product to shift, a large amount of fluid is discharged in a short period of time, or when sleeping on the side at night, side leakage may easily occur and contaminate clothing or bed sheets.

[0004] Therefore, there is a certain demand in the industry for improving the structure of absorbent products to reduce side leakage. Utility Model Content

[0005] The utility model aims to provide an absorbent core for an absorbent product, which can at least solve some of the above technical problems.

[0006] The utility model also aims to provide an absorbent product using the improved absorbent core.

[0007] According to one aspect of the utility model, there is provided an absorbent core for absorbent products, the absorbent core having a longitudinal direction along the length, a transverse direction perpendicular to the longitudinal direction, and a thickness direction, and is characterized in that the absorbent core comprises a core body, and side baffle structures protruding in the thickness direction are respectively formed on opposite sides of the absorbent core in the transverse direction, and the side baffle structures extend along the longitudinal direction, and the side baffle structures are composed of at least one of the following: side protrusions respectively formed on opposite sides of the core body in the transverse direction; and a barrier layer attached to opposite sides of the core body in the transverse direction and protruding from the core body in the thickness direction.

[0008] According to the absorbent core provided by the present solution, the two opposite side portions in the transverse direction are structurally designed to improve the absorption capacity of the side portions, and to make the side portions have a physical height in the thickness direction, thereby improving the ability of the side portions to block the lateral overflow of body excretions and absorb body excretions. Specifically, the side baffle structure of the absorbent core of the present solution can be formed only by the side protrusions integrally constructed by the core body itself, or can be formed only by the barrier layer protruding from the side portion of the core body in thickness, or can also be formed by the aforementioned side protrusions and the barrier layer together, wherein the barrier layer is attached to the top of the side protrusions.

[0009] In some embodiments, the absorbent core further comprises a rear protrusion arranged longitudinally with the core body, and the rear protrusion is located between two opposite side barrier structures in the transverse direction.

[0010] According to the present solution, the rear bulge may be arranged to correspond to the buttocks of the wearer, and the height of the bulge may play a role in sealing the absorbed body excretions at the rear side to prevent leakage.

[0011] In some embodiments, the rear protrusion is longitudinally spaced apart from the core, or the rear protrusion is connected to the core.

[0012] In some embodiments, the cross-section of the rear protrusion in the thickness direction is tapered.

[0013] In some embodiments, the barrier layer includes a water-repellent or weakly hydrophilic first material attached to laterally opposite sides of the core.

[0014] In some embodiments, the barrier layer includes a water-repellent or weakly hydrophilic first material and a water-absorbent second material, wherein the barrier layer is attached to laterally opposite sides of the core in a state where the second material is sandwiched between the first material and the core.

[0015] In the above two solutions, the first material of the upper layer with water repellency or weak hydrophilicity cooperates with the absorbent material of the lower layer of the core or the second material, the first material improves the barrier ability and can reduce reverse osmosis, the absorbent material of the core or the second material can diffuse rapidly after receiving the body fluid by the capillary effect, and the body fluid is locked by the absorbent material. The water repellency / weak hydrophilicity design cooperates with the absorbent material to further reduce reverse osmosis, and the product has convex side surfaces, which can prevent side leakage and quickly absorb body fluid.

[0016] In some embodiments, the barrier layer includes a hydrophilic third material and a water-absorbent second material, wherein the barrier layer is attached to opposite lateral sides of the core in a state where the second material is sandwiched between the third material and the core.

[0017] In some embodiments, the side barrier structure is composed of the side protrusions formed on opposite transverse sides of the core and the barrier layer attached to the side protrusions, wherein the barrier layer is attached to the top end of the side protrusions.

[0018] In some embodiments, the core comprises a mixture of fluff pulp and superabsorbent polymers.

[0019] According to another aspect of the utility model, an absorbent product is provided, comprising: a base sheet, including a top sheet and a bottom sheet arranged opposite to each other; an absorbent core attached to the base sheet between the top sheet and the bottom sheet; wherein the absorbent core is the absorbent core mentioned above.

[0020] Some of the other features and advantages of the present invention will be apparent to those skilled in the art after reading this application, and the other parts will be described in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 is a schematic diagram of a flat-laying absorbent article according to the utility model;

[0023] Figure 2 and Figure 3 is a schematic diagram of a first embodiment of an absorbent article according to the utility model;

[0024] Figure 4 and Figure 5 is a schematic diagram of a second embodiment of an absorbent article according to the present utility model;

[0025] Figure 6 and Figure 7 is a schematic diagram of a third embodiment of an absorbent article according to the present utility model;

[0026] Figure 8 and Fig. 9 is a schematic diagram of a fourth embodiment of an absorbent article according to the present utility model;

[0027] Fig.10 and Fig.11 is a schematic diagram of a fifth embodiment of an absorbent article according to the present utility model;

[0028] Fig.12 and Fig.13 is a schematic diagram of a sixth embodiment of an absorbent article according to the present utility model;

[0029] Fig.14 It is a schematic diagram of a first embodiment of an absorbent core with a rear protrusion of an absorbent article according to the utility model;

[0030] Fig.15 is a schematic diagram of a second embodiment of an absorbent core with a rear protrusion of an absorbent article according to the present invention;

[0031] Fig.16 yes Fig.15 Side view of an absorbent article.

[0032] Description of reference numerals:

[0033] 1-base sheet; 11-front area; 12-crotch area; 13-back area; 14-top sheet; 15-bottom sheet; 16-side wings; 2-guiding layer; 3-absorbent core; 4-core body; 41-middle part; 42-side part; 43-side protrusion; 44-recess; 45-middle protrusion; 5-side baffle structure; 6-barrier layer; 61-first material; 62-second material; 63-third material; 7-back glue; 8-back protrusion; 81-side edge; 82-front end; 83-rear end; 9-absorbent article; L-longitudinal direction; T-transverse direction; H-thickness direction DETAILED DESCRIPTION

[0034] Now, with reference to the accompanying drawings, schematic schemes of the absorbent core disclosed in the utility model and the absorbent article having the same are described in detail. Although the accompanying drawings are provided to present some embodiments of the utility model, the accompanying drawings do not have to be drawn according to the size of the specific embodiments, and certain features can be enlarged, removed or partially cut to better illustrate and explain the disclosure of the utility model. Some components in the accompanying drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the accompanying drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0035] Certain directional terms used to describe the drawings below, such as "inside", "outside", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0036] The terms "first", "first", "second", "second" and the like used in the present invention do not indicate any order, quantity or importance, but are used to distinguish one component from other components.

[0037] As used herein, the term "absorbent article" refers to a product that can be placed against or near the wearer's body, i.e., adjacent to the body, for absorbing and containing various liquid, solid and semi-solid excretions discharged from the body. As described herein, such absorbent articles are intended to be discarded after a limited period of use, rather than being washed or otherwise restored for reuse, and therefore may also be referred to as "disposable absorbent articles".

[0038] As used herein, the term "attachment" refers to the joining, connection or adhesion of two elements. Two elements will be considered to be attached together when they are directly connected to each other or indirectly connected to each other, such as when superimposed and positioned on each other. Attachment can be carried out by means such as adhesives, pressure bonding, heat bonding, ultrasonic welding, splicing or sewing.

[0039] As used herein, the term "ultrasonic welding" refers to a process performed, for example, by passing a material through a slit between an ultrasonic generator and a support roll.

[0040] As used herein, "SAM", "SAP", "superabsorbent polymer", "superabsorbent particles" all refer to the same class of substances, all referring to polymers that can absorb and retain very large amounts of liquid relative to their own mass. Crosslinkable water-absorbing polymers classified as hydrogels absorb aqueous solutions through hydrogen bonds and other polar forces with water molecules. The water absorption capacity of SAP is based in part on the index of the ion concentration of the ionic aqueous solution and the polar functional groups of SAP with water affinity. SAP is generally manufactured by polymerizing acrylic acid mixed with sodium hydroxide in the presence of an initiator to form polyacrylic acid sodium salt (sometimes referred to as sodium polyacrylate). Other materials can also be used to make superabsorbent polymers, such as polyacrylamide copolymers, ethylene maleic anhydride copolymers, crosslinked carboxymethyl cellulose, polyvinyl alcohol copolymers, crosslinked polyethylene oxide and starch graft copolymers of polyacrylonitrile. SAP can be present in absorbent products in the form of particles or fibers.

[0041] As used herein, "water repellent" refers to a material property in which the surface tension of the material fibers is reduced so that water droplets cannot wet the fiber surface. "Water repellent" can also be understood as breathable waterproofing.

[0042] As used herein, "weakly hydrophilic" refers to a material property in which liquids penetrate vertically through the material relatively well but do not substantially diffuse laterally across the surface.

[0043] As used herein, "hydrophilicity" refers to a material property in which a molecule is able to form transient bonds with water molecules through hydrogen bonding. Such a molecule can be dissolved not only in water but also in other polar solutions because it is thermodynamically suitable.

[0044] The utility model relates to an absorbent core, which is used for personal care absorbent products, wherein the absorbent core constructs a side baffle structure protruding in the thickness direction on two laterally opposite side parts, and the side baffle structure can be formed only by a barrier layer protruding from the lateral side of the core body, or can be formed by the barrier layer and the side protrusions of the core body of the absorbent core, or can be formed only by the side protrusions of the core body. The barrier layer can be composed of a first water-repellent or weakly hydrophilic material, or can be composed of a first water-repellent or weakly hydrophilic material and a second water-absorbent material, or can be composed of a second water-absorbent material and a third hydrophilic material. The first water-repellent or weakly hydrophilic material and the third hydrophilic material can be, for example, hot air non-woven sheets. By attaching the barrier layer to the side of the core body, many advantages can be provided, including improving the reverse osmosis ability of the absorbent product, preventing body fluids from overflowing and leaking laterally along the absorbent product, increasing the absorption speed of the absorbent product, and improving the fit of the absorbent product.

[0045] Figure 1 An absorbent article 9 according to the present invention is shown as an example. The absorbent article 9 may be a feminine hygiene product, such as a sanitary napkin or a panty liner. It should be understood that, without departing from the scope of the present invention, the technical solution of the present invention is suitable for absorbent articles for personal care, including but not limited to sanitary napkins, panty liners, diapers, training pants, pull-up pants, etc.

[0046] like Figure 1 As shown, the absorbent article 9 is shown in a flat configuration and in a natural state, without elastic deformation or wrinkles due to external forces. The absorbent article 9 has a lateral T and a longitudinal L that are perpendicular to each other, and has a thickness direction H. Along the longitudinal direction L, the main body or substrate 1 of the absorbent article 9 can be roughly divided into a front area 11, a crotch area 12 and a back area 13, wherein the crotch area 12 is connected between the front area 11 and the back area 13. In order to improve the absorption capacity of the absorbent article 9 and stably connect the absorbent article 9 to the wearer's clothing, side wings 16 that can be expanded outward can also be provided on the lateral opposite sides of the crotch area 12. The side wings 16 can be cut and formed as a whole with the substrate 1, for example. In other embodiments, the absorbent article 9 can also be without side wings 16.

[0047] like Figures 2 to 13 As shown, viewed perpendicular to the LT plane or in the thickness direction H, the base sheet 1 includes a top sheet 14 adapted to face the body when worn and a back sheet 15 adapted to face the clothing when worn. The top sheet 14 and the back sheet 15 can be joined together along the periphery by known joining techniques such as adhesives, ultrasonic bonding, etc., to form a sealed peripheral area and an internal cavity, and the absorbent core 3 is arranged in the internal cavity.

[0048] The top sheet 14 can be a single layer or multi-layer laminate, which defines a surface that directly contacts the wearer's skin, and can be hydrophilic to receive body discharges and guide body discharges to the absorbent core 3. The top sheet 14 preferably retains almost no liquid in its structure, thereby providing a relatively comfortable and non-irritating touch while being close to the wearer's skin. The liquid passing through the top sheet 14 can directly enter the absorbent core 3. Alternatively, a guide layer 2 can be set between the top sheet 14 and the absorbent core 3. The guide layer 2 helps the absorbent article 9 to absorb liquid quickly, effectively and evenly, and prevents liquid from being concentrated locally in the absorbent core 3, causing the absorbent core to be blocked locally due to excessive absorption and further forming back infiltration. In order to evenly distribute the absorbed body discharges, especially liquid, the guide layer 2 can be provided with a guide structure, for example, having a groove oriented to the periphery from the position corresponding to the center of the top sheet 14.

[0049] Backsheet 15 is impermeable to liquids and is the part of absorbent article 9 facing the wearer's clothing. Backsheet 15 can be configured to allow gas to overflow from absorbent article 9, but prevents liquid from flowing through. Backsheet 15 can be a single layer or multilayer laminate, such as a liquid-tight film material. Various weaving and nonwoven fabrics can be used to make top sheet and backsheet. The example of nonwoven fabric can be spunbond fabric, meltblown fabric, spunlace fabric, hot air fabric, etc., and their combination.

[0050] The absorbent core 3 is positioned between the top sheet 14 and the back sheet 15, and can form an attachment relationship with at least one of the top sheet 14 and the back sheet 15. In the embodiment with the guide layer 2, the absorbent core 3 is arranged between the guide layer 2 and the back sheet 15, and forms an attachment relationship with at least one of the guide layer 2 and the back sheet 15. The absorbent core 3 can be a mixture of fluff pulp and SAM, and can be constructed as a laminated composite material, or can be a single layer material. The absorbent core 3 can show a certain degree of scalability and comfort, is non-irritating to the wearer's skin, and can absorb and retain body discharges. The mixture of fluff pulp and SAM can make the absorbent core 3 present a large number of honeycomb or microporous configurations inside. When receiving the body fluids pouring in through the top sheet 14 and the possible guide layer 2, these honeycomb or microporous configurations can form a capillary effect, prompting the body fluids to spread rapidly to prevent the body fluids from accumulating locally, and at the same time, SAM can effectively lock the body fluids and improve the absorption effect of the absorbent article 9.

[0051] Figures 2 to 13 Various different embodiments of absorbent articles 9 are shown, particularly various exemplary configurations of the absorbent core 3. These embodiments will be described in detail below with reference to the accompanying drawings.

[0052] Figure 2 and Figure 3 A first embodiment of an absorbent article 9 is shown. Figure 2 Schematic diagram of absorbent article 9 viewed from thickness direction H is shown. In this embodiment, absorbent core 3 of absorbent article 9 is sandwiched between distribution layer 2 and backing sheet 15. Backing sheet 15 is provided with backing adhesive 7 on the side facing away from absorbent core 3 to help position absorbent article 9 on the wearer's clothing.

[0053] Figure 3 Shows Figure 2Schematic diagram of the absorbent core 3 of the absorbent article 9 in FIG. As shown in the figure, the absorbent core 3 is basically composed of a core 4. Here, the core 4 adopts a mixture of fluff pulp and SAM and adopts an integral configuration. The orientation of the core 4 is basically consistent with the orientation of the absorbent article 9, the longitudinal direction L of the absorbent article 9 is also the longitudinal direction L of the core 4, the transverse direction T of the absorbent article 9 is also the transverse direction T of the core 4, and the thickness direction H of the absorbent article 9 is also the thickness direction H of the core 4. The core 4 includes a middle part 41 and two side parts 42 located on the transverse opposite sides of the middle part 41 from the transverse direction T. The middle part 41 of the core 4 protrudes toward the direction of the top sheet 14 to form a middle protrusion 45 in the thickness direction H. The transverse width of the middle protrusion 45 of the core 4 can be gradually reduced in the direction close to the top sheet 14. Alternatively, the transverse width of the middle protrusion 45 of the core 4 can be constant. This middle protrusion 45 protruding in the middle of the core helps to improve the fit and absorption performance of the absorbent article 9. The two lateral sides 42 of the core 4 are each formed with a side protrusion 43 protruding in the direction of the top sheet 14, so that a physical height is formed on both sides of the absorbent core 3 in the thickness direction H, and a recess or interval 44 is formed between the side protrusion 43 and the middle protrusion 45. This physical height can be achieved by increasing the amount of fluff pulp and SAM in the lateral side 42 of the core 4, so that the absorbent article 9 can fit the human body more closely, and improve the absorption capacity, and effectively prevent body fluids from overflowing the absorbent article 9 in the lateral direction. The lateral width of the side protrusion 43 of the core 4 can be constant. Alternatively, the lateral width of the side protrusion 43 of the core 4 can be gradually reduced in the direction close to the top sheet 14. The convex top of the side protrusion 43 can also be constructed with an arc top. In addition, by adjusting the amount of fluff pulp and SAM, the top surface of the side protrusion 43 facing the top sheet 14 can be flush with the top surface of the middle protrusion 45, or the top surface of the side protrusion 43 can be higher than the top surface of the middle protrusion 45. The basis weight of a single side projection 43 may be less than or equal to 800 gsm.

[0054] The side protrusions 43 integrally formed by the core body 4 constitute the side barrier structure 5 of the absorbent core 3, which can effectively improve the side absorption capacity of the absorbent core or the absorbent product and prevent body fluids from flowing laterally and overflowing the absorbent product.

[0055] Figure 4 and Figure 5 A second embodiment of an absorbent article 9 is shown. In this embodiment, the structure and layout of the absorbent article 9 other than the absorbent core 3 are substantially the same as those of the first embodiment, so only the variation of the absorbent core 3 will be described in detail below.

[0056] Figure 5The schematic diagram of the absorbent core 3 of the second embodiment is shown. As shown in the figure, the absorbent core 3 includes a core 4 and a barrier layer 6 attached to the opposite sides of the core 4 in the transverse direction. Here, the core 4 adopts a mixture of fluff pulp and SAM and adopts an integral configuration. The orientation of the core 4 is basically consistent with the orientation of the absorbent article 9, the longitudinal direction L of the absorbent article 9 is also the longitudinal direction L of the core 4, the transverse direction T of the absorbent article 9 is also the transverse direction T of the core 4, and the thickness direction H of the absorbent article 9 is also the thickness direction H of the core 4. The core 4 includes a middle part 41 and two side parts 42 located on opposite sides of the middle part 41 in the transverse direction T. The middle part 41 of the core 4 protrudes toward the top sheet 14 to form a middle protrusion 45 in the thickness direction H. The transverse width of the middle protrusion 45 of the core 4 can be gradually reduced in the direction close to the top sheet 14. Alternatively, the transverse width of the middle protrusion 45 of the core 4 can be constant. This middle protrusion 45 protruding in the middle of the core helps to improve the fit and absorption performance of the absorbent article 9. The two lateral sides 42 of the core 4 are each formed with a side protrusion 43 protruding in the direction of the top sheet 14, so that a physical height is formed on both sides of the absorbent core 3 in the thickness direction H, and a recess or interval 44 is formed between the side protrusion 43 and the middle protrusion 45. This physical height can be achieved by increasing the amount of fluff pulp and SAM in the lateral side 42 of the core 4, so that the absorbent article 9 can fit the human body more closely, and improve the absorption capacity, effectively blocking body fluids from overflowing the absorbent article 9 in the lateral direction. The lateral width of the side protrusion 43 of the core 4 can be constant. Alternatively, the lateral width of the side protrusion 43 of the core 4 can be gradually reduced in the direction close to the top sheet 14. The protrusion top of the side protrusion 43 can also be constructed with an arc top. The basis weight of a single side protrusion 43 can be less than or equal to 600gsm, or less than or equal to 500gsm.

[0057] A barrier layer 6 is attached to the top of each side protrusion 43 facing the top sheet 14. The barrier layer 6 can be composed of a first material 61 that is water-repellent or weakly hydrophilic, and is attached to the top surface of the side protrusion 43, for example, by an adhesive. The barrier layer 6 protrudes from the attached side protrusion 43, and the side protrusions 43 on each side and the barrier layer 6 together construct a lateral side barrier structure 5 of the absorbent core 3. The side barrier structure 5 can effectively improve the side absorption capacity of the absorbent core or absorbent article, and prevent the body fluid from flowing laterally and overflowing the absorbent article. The first material 61 that is water-repellent or weakly hydrophilic improves the lateral blocking capacity and prevents the absorbed body fluid from reverse osmosis, while the side protrusions 43 of the core 4 attached below the first material 61 cooperate with the first material 61 to guide the absorbed body fluid to diffuse rapidly through the capillary effect, and can lock the body fluid.

[0058] The first material 61 may be any suitable material, for example, a hot air non-woven sheet treated with water repellency or weak hydrophilicity.

[0059] Figure 6 and Figure 7A third embodiment of an absorbent article 9 is shown. In this embodiment, the structure and layout of the absorbent article 9 other than the absorbent core 3 are substantially the same as those of the first embodiment, so only the variation of the absorbent core 3 will be described in detail below.

[0060] Figure 7 The schematic diagram of the absorbent core 3 of the third embodiment is shown. As shown in the figure, the absorbent core 3 includes a core 4 and a barrier layer 6 attached to the opposite sides of the core 4 in the transverse direction, wherein the barrier layer 6 is a multi-layer composite structure. Here, the core 4 adopts a mixture of fluff pulp and SAM and adopts an integral configuration. The orientation of the core 4 is basically consistent with the orientation of the absorbent article 9, the longitudinal direction L of the absorbent article 9 is also the longitudinal direction L of the core 4, the transverse direction T of the absorbent article 9 is also the transverse direction T of the core 4, and the thickness direction H of the absorbent article 9 is also the thickness direction H of the core 4. The core 4 includes a middle part 41 and two side parts 42 located on opposite sides of the middle part 41 in the transverse direction T. The middle part 41 of the core 4 protrudes toward the top sheet 14 to form a middle protrusion 45 in the thickness direction H. The transverse width of the middle protrusion 45 of the core 4 can be gradually reduced in the direction close to the top sheet 14. Alternatively, the transverse width of the middle protrusion 45 of the core 4 can be constant. The central protrusion 45 protruding in the middle of the core helps to improve the fit and absorption performance of the absorbent article 9. The two lateral sides 42 of the core 4 extend flatly in a direction away from the middle part 41, thereby forming a height difference with the middle part 41 in the thickness direction H.

[0061] The surface of each side portion 42 facing the top sheet 14 is attached with a barrier layer 6. The barrier layer 6 can be composed of a first material 61 that is water-repellent or weakly hydrophilic and a second material 62 that is water-absorbent, and is attached to the surface of the side portion 42 facing the top sheet 14, for example, by an adhesive. The barrier layer 6 protrudes from the side portion 42 of the core 4 as a whole and provides a certain physical height, so that the barrier layer 6 on each side constructs a side baffle structure 5 of the absorbent core 3. The side baffle structure 5 can effectively improve the side absorption capacity of the absorbent core or absorbent product, and prevent the body fluid from flowing laterally and overflowing the absorbent product. The first material 61 that is water-repellent or weakly hydrophilic improves the lateral blocking capacity and prevents the absorbed body fluid from reverse osmosis, while the second material 62 sandwiched between the first material 61 and the side portion 42 of the core 4 cooperates with the first material 61 together with the core 4, guides the absorbed body fluid to diffuse rapidly through the capillary effect, and can lock the body fluid.

[0062] The first material 61 can be any suitable material, such as a hot air nonwoven sheet treated with water repellency or weak hydrophilicity. The second material 62 can be any suitable material, such as dust-free paper or SAP sheet. The basis weight of the hot air nonwoven sheet can be less than or equal to 100 gsm. The basis weight of dust-free paper or SAP sheet can be less than or equal to 200 gsm. The total basis weight of the barrier layer 6 can range from 150 gsm to 250 gsm.

[0063] Figure 8 and Fig. 9 A fourth embodiment of the absorbent article 9 is shown. In this embodiment, the structure and layout of the absorbent article 9 other than the absorbent core 3 are substantially the same as those of the first embodiment, so only the variation of the absorbent core 3 will be described in detail below.

[0064] Fig. 9 The schematic diagram of the absorbent core 3 of the fourth embodiment is shown. As shown in the figure, the absorbent core 3 includes a core 4 and a barrier layer 6 attached to the opposite sides of the core 4 in the transverse direction, wherein the barrier layer 6 is a multi-layer composite structure. Here, the core 4 adopts a mixture of fluff pulp and SAM and adopts an integral configuration. The orientation of the core 4 is basically consistent with the orientation of the absorbent article 9, the longitudinal direction L of the absorbent article 9 is also the longitudinal direction L of the core 4, the transverse direction T of the absorbent article 9 is also the transverse direction T of the core 4, and the thickness direction H of the absorbent article 9 is also the thickness direction H of the core 4. The core 4 includes a middle part 41 and two side parts 42 located on opposite sides of the middle part 41 in the transverse direction T. The middle part 41 of the core 4 protrudes toward the top sheet 14 to form a middle protrusion 45 in the thickness direction H. The transverse width of the middle protrusion 45 of the core 4 can be gradually reduced in the direction close to the top sheet 14. Alternatively, the transverse width of the middle protrusion 45 of the core 4 can be constant. This middle protrusion 45 protruding in the middle of the core body helps to improve the fit and absorption performance of the absorbent article 9. The two lateral side portions 42 of the core body 4 are each formed with a side protrusion 43 protruding in the direction of the top sheet 14, so that a physical height is formed on both sides of the absorbent core 3 in the thickness direction H, and a recess or interval 44 is formed between the side protrusion 43 and the middle protrusion 45. This physical height can be achieved by increasing the amount of fluff pulp and SAM in the lateral side portions of the core body 4, so that the absorbent article 9 can be more fit to the human body, and the absorption capacity is improved, and the body fluid is effectively blocked from overflowing the absorbent article 9 in the lateral direction. The lateral width of the side protrusion 43 of the core body 4 can be constant. Alternatively, the lateral width of the side protrusion 43 of the core body 4 can be gradually reduced in the direction close to the top sheet 14. The convex top of the side protrusion 43 can also be constructed with an arc top. The top surface of the side protrusion 45 can be lower than the top surface of the middle protrusion 45. The basis weight of a single side projection 43 may be less than or equal to 600 gsm, or less than or equal to 500 gsm.

[0065] A barrier layer 6 is attached to the top of each side protrusion 43 facing the top sheet 14. The barrier layer 6 can be composed of a first material 61 that is water-repellent or weakly hydrophilic and a second material 62 that absorbs water, and is attached to the top surface of the side protrusion 43, for example, by an adhesive. The barrier layer 6 protrudes from the side protrusion 43 of the core 4 as a whole, and the barrier layer 6 on each side and the side protrusion 43 together form a side baffle structure 5 of the absorbent core 3. The side baffle structure 5 can effectively improve the side absorption capacity of the absorbent core or absorbent article, and prevent the body fluid from flowing laterally and overflowing the absorbent article. The first material 61 that is water-repellent or weakly hydrophilic improves the lateral blocking capacity and prevents the absorbed body fluid from reverse osmosis, while the second material 62 sandwiched between the first material 61 and the side protrusion 43 of the core 4 cooperates with the first material 61 together with the core 4, guides the absorbed body fluid to diffuse rapidly through the capillary effect, and can lock the body fluid.

[0066] The first material 61 can be any suitable material, such as a hot air nonwoven sheet treated with water repellency or weak hydrophilicity. The second material 62 can be any suitable material, such as dust-free paper or SAP sheet. The basis weight of the hot air nonwoven sheet can be less than or equal to 100 gsm. The basis weight of the dust-free paper or SAP sheet can be less than or equal to 100 gsm. The total basis weight of the barrier layer 6 can range from 50 gsm to 150 gsm.

[0067] Fig.10 and Fig.11 A fifth embodiment of an absorbent article 9 is shown. In this embodiment, the structure and layout of the absorbent article 9 other than the absorbent core 3 are substantially the same as those of the first embodiment, so only the variation of the absorbent core 3 will be described in detail below.

[0068] Fig.11The schematic diagram of the absorbent core 3 of the fifth embodiment is shown. As shown in the figure, the absorbent core 3 includes a core 4 and a barrier layer 6 attached to the opposite sides of the core 4 in the transverse direction, wherein the barrier layer 6 is a multi-layer composite structure. Here, the core 4 adopts a mixture of fluff pulp and SAM and adopts an integral configuration. The orientation of the core 4 is basically consistent with the orientation of the absorbent article 9, the longitudinal direction L of the absorbent article 9 is also the longitudinal direction L of the core 4, the transverse direction T of the absorbent article 9 is also the transverse direction T of the core 4, and the thickness direction H of the absorbent article 9 is also the thickness direction H of the core 4. The core 4 includes a middle part 41 and two side parts 42 located on opposite sides of the middle part 41 in the transverse direction T. The middle part 41 of the core 4 protrudes toward the top sheet 14 to form a middle protrusion 45 in the thickness direction H. The transverse width of the middle protrusion 45 of the core 4 can be gradually reduced in the direction close to the top sheet 14. Alternatively, the transverse width of the middle protrusion 45 of the core 4 can be constant. The central protrusion 45 protruding in the middle of the core helps to improve the fit and absorption performance of the absorbent article 9. The two lateral sides 42 of the core 4 extend flatly in a direction away from the middle part 41, thereby forming a height difference with the middle part 41 in the thickness direction H.

[0069] The surface of each side portion 42 facing the top sheet 14 is attached with a barrier layer 6. The barrier layer 6 can be composed of a hydrophilic third material 63 and a water-absorbent second material 62 attached together, and is attached to the surface of the side portion 42 facing the top sheet 14, for example, by an adhesive. The barrier layer 6 protrudes from the side portion 42 of the core 4 as a whole and provides a certain physical height, so that the side baffle structure 5 of the absorbent core 3 is constructed by the barrier layer 6 on each side. The side baffle structure 5 can effectively improve the side absorption capacity of the absorbent core or absorbent product, and prevent body fluids from flowing laterally and overflowing the absorbent product. The water absorption properties of the third material 63 and the second material 62 can be basically the same. Alternatively, the water absorption properties of the third material 63 can be lower than or slightly lower than the water absorption properties of the second material 62.

[0070] The third material 63 may be any suitable material, such as a hydrophilic treated air-through nonwoven sheet. The second material 62 may be any suitable material, such as dust-free paper or SAP sheet. The basis weight of the air-through nonwoven sheet may be less than or equal to 100 gsm. The basis weight of the dust-free paper or SAP sheet may be less than or equal to 200 gsm. The total basis weight of the barrier layer 6 may range from 150 gsm to 250 gsm.

[0071] Fig.12 and Fig.13 A sixth embodiment of an absorbent article 9 is shown. In this embodiment, the structure and layout of the absorbent article 9 other than the absorbent core 3 are substantially the same as those of the first embodiment, so only the variation of the absorbent core 3 will be described in detail below.

[0072] Fig.13The schematic diagram of the absorbent core 3 of the sixth embodiment is shown. As shown in the figure, the absorbent core 3 includes a core 4 and a barrier layer 6 attached to the opposite sides of the core 4 in the transverse direction, wherein the barrier layer 6 is a multi-layer composite structure. Here, the core 4 adopts a mixture of fluff pulp and SAM and adopts an integral configuration. The orientation of the core 4 is basically consistent with the orientation of the absorbent article 9, the longitudinal direction L of the absorbent article 9 is also the longitudinal direction L of the core 4, the transverse direction T of the absorbent article 9 is also the transverse direction T of the core 4, and the thickness direction H of the absorbent article 9 is also the thickness direction H of the core 4. The core 4 includes a middle part 41 and two side parts 42 located on opposite sides of the middle part 41 in the transverse direction T. The middle part 41 of the core 4 protrudes toward the top sheet 14 to form a middle protrusion 45 in the thickness direction H. The transverse width of the middle protrusion 45 of the core 4 can be gradually reduced in the direction close to the top sheet 14. Alternatively, the transverse width of the middle protrusion 45 of the core 4 can be constant. This middle protrusion 45 protruding in the middle of the core body helps to improve the fit and absorption performance of the absorbent article 9. The two lateral side portions 42 of the core body 4 are each formed with a side protrusion 43 protruding in the direction of the top sheet 14, so that a physical height is formed on both sides of the absorbent core 3 in the thickness direction H, and a recess or interval 44 is formed between the side protrusion 43 and the middle protrusion 45. This physical height can be achieved by increasing the amount of fluff pulp and SAM in the lateral side portions of the core body 4, so that the absorbent article 9 can be more fit to the human body, and the absorption capacity is improved, and the body fluid is effectively blocked from overflowing the absorbent article 9 in the lateral direction. The lateral width of the side protrusion 43 of the core body 4 can be constant. Alternatively, the lateral width of the side protrusion 43 of the core body 4 can be gradually reduced in the direction close to the top sheet 14. The convex top of the side protrusion 43 can also be constructed with an arc top. The top surface of the side protrusion 45 can be lower than the top surface of the middle protrusion 45. The basis weight of a single side projection 43 may be less than or equal to 600 gsm, or less than or equal to 500 gsm.

[0073] The surface of each side portion 42 facing the top sheet 14 is attached with a barrier layer 6. The barrier layer 6 can be composed of a hydrophilic third material 63 and a water-absorbent second material 62 attached together, and is attached to the surface of the side portion 42 facing the top sheet 14, for example, by an adhesive. The barrier layer 6 protrudes as a whole from the side protrusions 43 of the core 4 and provides a certain physical height, so that the barrier layer 6 on each side and the side protrusions 43 together construct a side baffle structure 5 of the absorbent core 3. The side baffle structure 5 can effectively improve the side absorption capacity of the absorbent core or absorbent article, and prevent body fluids from flowing laterally and overflowing the absorbent article. The water absorption properties of the third material 63 and the second material 62 can be basically the same. Alternatively, the water absorption properties of the third material 63 can be lower than or slightly lower than the water absorption properties of the second material 62.

[0074] The third material 63 may be any suitable material, such as a hydrophilic treated air-through nonwoven sheet. The second material 62 may be any suitable material, such as dust-free paper or SAP sheet. The basis weight of the air-through nonwoven sheet may be less than or equal to 100 gsm. The basis weight of the dust-free paper or SAP sheet may be less than or equal to 100 gsm. The total basis weight of the barrier layer 6 may range from 50 gsm to 150 gs m.

[0075] In the above embodiments, the side baffle structure 5 can span the entire longitudinal length of the core 4 in the longitudinal direction. In other words, the side baffle structure 5 can extend from one longitudinal end of the core 4 to the other longitudinal end in the longitudinal direction, so that its longitudinal length is basically consistent with the longitudinal length of the core 4. Of course, the longitudinal length of the side baffle structure 5 can also be adjusted to be smaller than the longitudinal length of the core 4 according to actual needs, such as accounting for 3 / 4, 2 / 3, 1 / 2, etc. of the longitudinal length of the core 4. In addition, the transverse width of a single side baffle structure 5 can account for about half of the transverse width of the entire core 4. In this case, it is equivalent to omitting the middle protrusion 45 of the core 4, or the middle protrusion 45 and the side baffle structure 5 can be connected as a whole. Alternatively, the transverse width of a single side baffle structure 5 can also be less than half of the transverse width of the core 4, such as accounting for 40%, 30%, 25%, etc. of the transverse width of the entire core 4.

[0076] Reference below Fig.14 and Fig.15 , which shows two other embodiments of the absorbent article 9 according to the utility model, wherein the rear bulge 8 is mainly added to each absorbent article 9. Fig.14 and Fig.15 In the embodiment, the structure and layout of the absorbent article 9 except the rear protrusion 8 can be combined with the corresponding structure and layout of the absorbent article 9 in any of the aforementioned embodiments, and therefore only the rear protrusion 8 will be described in detail below.

[0077] like Fig.14As shown, in one embodiment, the rear protrusion 8 and the core 4 are arranged and spaced apart in the longitudinal direction, wherein the rear protrusion 8 is closer to the rear of the absorbent article 9 and is almost aligned with the buttocks of the wearer in the use state. From the LT plane, the rear protrusion 8 is located between the two side baffle structures 5, and can be configured to be similar to a fan-shaped one side is narrower in the transverse direction and the other side is wider in the transverse direction, wherein the narrower side is close to the core 4, and the wider side is away from the core 4. The wider side can basically span the entire or almost the entire transverse width of the absorbent article 1. Specifically, the rear protrusion 8 includes two side edges 81 opposite in the transverse direction, a front end 82 connected between the two side edges 81 on the side close to the core 4, and a rear end 83 connected between the two side edges 81 on the side away from the core 4, wherein the front end 82 is a narrower end, and the rear end 83 is a wider end. This fan-like configuration is more in line with the physiological morphology through a reasonable layout and fits the human body, and can provide a blocking effect on the buttocks of the wearer to prevent body fluids from overflowing backwards. The two side edges 81 can be configured as inwardly curved lines. Alternatively, the two side edges 81 can be configured as straight lines. The basis weight of the rear protrusion 8 can be less than or equal to 400 gsm. The distance h between the rear end 83 and the rear end edge of the absorbent article 9 can be about 35 mm. The material of the rear protrusion 8 can be the same as that of the core 4, which is made of a mixture of fluff pulp and SAM.

[0078] like Fig.15 As shown, in another embodiment, the rear protrusion 8 is arranged and connected to the core 4 in the longitudinal direction, wherein the rear protrusion 8 is closer to the rear part of the absorbent article 9 and is almost aligned with the wearer's buttocks in the use state. From the LT plane, the rear protrusion 8 is located between the two side baffle structures 5, and can be configured to be similar to a fan-shaped one side is narrower in the transverse direction and the other side is wider in the transverse direction, wherein the narrower side is connected to the core 4, such as connected to the middle part 41 of the core 4, and the wider side is away from the core 4. The wider side can basically span the entire or almost the entire transverse width of the absorbent article 1. Specifically, the rear protrusion 8 includes two side edges 81 opposite in the transverse direction and a rear end 83 connected between the two side edges 81 on a side away from the core 4, wherein the rear end 83 is the wider end. Here, since the front part of the rear protrusion 8 is connected to the core 4, its front end may not have a clear boundary visually. This fan-like configuration is more in line with the physiological morphology through a reasonable layout, fits the human body, and can provide a blocking effect on the wearer's buttocks to prevent body fluids from overflowing backwards. The two side edges 81 can be configured as inwardly curved lines. Alternatively, the two side edges 81 can be configured as straight lines. The basis weight of the rear protrusion 8 can be less than or equal to 600 gsm. The distance h between the rear end 83 and the rear end edge of the absorbent article 9 can be about 50 mm. The material of the rear protrusion 8 can be the same as that of the core 4, which is made of a mixture of fluff pulp and SAM.

[0079] Fig.16 yes Fig.15 The absorbent article 9 of the embodiment of the present invention is a schematic diagram viewed from the side or from the LH plane, wherein the front part of the rear protrusion 8 is indicated by a dotted line because it is blocked by the side barrier structure 5. As shown in the figure, in order to improve the ability of the rear protrusion 8 to fit the human body, the rear protrusion 8 can be designed to be similar to a pyramid or a truncated pyramid structure, so that in the thickness direction, its cross section is gradually reduced in the direction of the back film 15 away from the substrate 1. Although the rear protrusion 8 is shown in a quadrangular pyramid configuration, it will be understood by those skilled in the art that the rear protrusion 8 can also be configured to be similar to a triangular pyramid, a pentagonal pyramid or other multi-sided pyramid configuration. Of course, the rear protrusion 8 can also not construct a side edge while its cross section is gradually reduced in the direction of the back film 15 away from the substrate 1, but presents it with a more rounded configuration, similar to a truncated cone or a cone. In addition, the rear protrusion 8 is not limited to the configuration of the cross section gradually reduced in the thickness direction. In other embodiments not shown, the cross section of the rear protrusion 8 can also be substantially constant, so that its top surface is configured to be a flat surface. The height of the rear protrusion 8 in the thickness direction may exceed the side baffle structures 5 on both sides, or be flush with the side baffle structures 5. In other embodiments, the cross section of the rear protrusion 8 may also be gradually reduced in the direction away from the backsheet 15 of the substrate 1, but different from the above-mentioned pyramid configuration, in this embodiment, the front end of the rear protrusion 8 close to the front area 11 of the absorbent article 9 constitutes the highest point of the entire rear protrusion 8, and from the front end of the rear protrusion 8 to the rear end of the front area 11 of the rear protrusion 8 away from the absorbent article 9, the height of the rear protrusion 8 is gradually reduced, so that the rear end of the rear protrusion 8 becomes the lowest point of the entire rear protrusion 8. The height of the front end of the rear protrusion 8 may be flush with the side baffle structures 5, or may be higher or lower than the side baffle structures 5.

[0080] In addition, as shown in the figure, when viewed from the LH plane, the rear protrusion 8 may have two sections in the longitudinal direction L, wherein the length of the first section close to the core 4 in the longitudinal direction L is greater than the length of the second section away from the core 4 in the longitudinal direction L. The connection between the first section and the second section is the maximum height of the entire rear protrusion 8 in the thickness direction H, and the thickness of the first section gradually decreases from the maximum height in the direction close to the core 4, and the slope is relatively small, while the thickness of the second section gradually decreases from the maximum height in the direction away from the core 4, and the slope is relatively large. It can be understood that Fig.16 The configuration of the rear protrusion 8 shown can also be combined with Fig.14 In the embodiment, it is sufficient to space the rear protrusion 8 from the core body 4.

[0081] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0082] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An absorbent core for an absorbent article, the absorbent core having a longitudinal direction (L) along the length, a transverse direction (T) perpendicular to the longitudinal direction (L), and a thickness direction (H), characterized in that: The absorbent core comprises a core body (4), and side baffle structures (5) protruding in the thickness direction (H) are respectively formed on opposite sides of the absorbent core in the transverse direction, and the side baffle structures (5) extend along the longitudinal direction (L), and the side baffle structures (5) are composed of at least one of the following: The core body (4) has side protrusions (43) formed on two opposite sides thereof in the transverse direction; A barrier layer (6) is attached to opposite transverse sides of the core (4) and protrudes from the core (4) in the thickness direction (H).

2. The absorbent core according to claim 1, characterized in that The absorbent core further comprises a rear protrusion (8) arranged longitudinally with the core body (4), and the rear protrusion (8) is located between two opposite side baffle structures (5) in the transverse direction.

3. The absorbent core according to claim 2, characterized in that The rear protrusion (8) is spaced apart from the core (4) in the longitudinal direction, or the rear protrusion (8) is connected to the core (4).

4. The absorbent core according to claim 2, characterized in that The cross section of the rear protrusion (8) in the thickness direction (H) is tapered.

5. The absorbent core according to claim 1, characterized in that The barrier layer (6) comprises a first water-repellent or weakly hydrophilic material (61), which is attached to the opposite lateral sides of the core (4).

6. The absorbent core according to claim 1, characterized in that The barrier layer (6) comprises a first water-repellent or weakly hydrophilic material (61) and a water-absorbent second material (62), wherein the barrier layer (6) is attached to opposite lateral sides of the core (4) in a state where the second material (62) is sandwiched between the first material (61) and the core (4).

7. The absorbent core according to claim 1, characterized in that The barrier layer (6) comprises a hydrophilic third material (63) and a water-absorbent second material (62), wherein the barrier layer (6) is attached to the opposite lateral sides of the core (4) in a state where the second material (62) is sandwiched between the third material (63) and the core (4).

8. The absorbent core according to any one of claims 1 to 7, characterized in that The side barrier structure (5) is composed of the side protrusions (43) formed on the opposite sides of the core (4) in the transverse direction and the barrier layer (6) attached to the side protrusions (43), wherein the barrier layer (6) is attached to the top end of the side protrusions (43).

9. The absorbent core according to any one of claims 1 to 7, characterized in that The core (4) comprises a mixture of fluff pulp and superabsorbent polymer.

10. An absorbent article comprising: A base sheet (1) comprising a top sheet (14) and a bottom sheet (15) arranged opposite to each other; an absorbent core (3) attached to the base sheet (1) between the top sheet (14) and the back sheet (15); It is characterized in that the absorbent core (3) is the absorbent core (3) according to any one of claims 1 to 9.

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