A disposable absorbent item

Abstract

A disposable absorbent product includes a liquid-permeable top layer, an absorbent core, a liquid-impermeable bottom layer, and leak-proof side panels. The first and third absorbent portions of the absorbent core are folded towards the skin surface of the second absorbent portion to form an opening, and are joined together by a bonding area. The front absorbent region has a first opening, and the rear absorbent region has a transverse elastic layer forming a second opening. Through the bonding area and the transverse elastic layer, the front absorbent region has a narrower first opening, and the rear absorbent region has a wider second opening, achieving dual absorption of both loose stools and urine while maintaining the dryness of the top layer, reducing skin irritation, and improving the user experience.

Description

Technical Field

[0001] This utility model relates to disposable absorbent articles, and more particularly to an absorbent core with a three-dimensional structure that can absorb both loose stools and urine. Background Technology

[0002] Disposable hygiene products include absorbent and non-absorbent products. Absorbent products mainly include baby hygiene products, feminine hygiene products, and adult incontinence products. Disposable hygiene products typically consist of a top layer, a distribution layer, an absorbent core layer, and a bottom layer. The absorbent core material is the key material in disposable absorbent hygiene products; it is used to absorb, diffuse, and store liquids, and needs to have the characteristics of rapid absorption, leak-proof, and backflow prevention.

[0003] With the iterative upgrades in absorbent core material technology, the industry has gradually completed the transformation from traditional cotton cores to highly absorbent resin composite materials. For example, Chinese patent application number 202420228647.9 discloses an ergonomic segmented sanitary napkin, including a top layer, a diversion layer, an absorbent core layer, and a leak-proof bottom layer. The body is divided into at least a front section, a middle section, and a back section along its length. The top layer of the front section has multiple protrusions, the top layer of the middle section has mesh grooves, and the top layer of the back section has straight grooves. This addresses the problem of existing sanitary napkins having low conformity to the body, failing to effectively divert menstrual blood from the top layer, and easily causing leakage. While the aforementioned sanitary napkin optimizes liquid absorption efficiency through mesh and straight grooves, the expansion of the polymer core after absorbing liquid occupies the space of the original diversion grooves, weakening or even rendering them ineffective, resulting in poor secondary absorption.

[0004] Absorbent cores for infants also need to have the ability to absorb loose stools. For example, Chinese Patent Application No. 202221017233.9 discloses an absorbent product that easily absorbs loose stools, including a top layer, a core, a bottom layer, and a PE film. The top layer is composed of a perforated layer and a barrier layer, and the perforated layer has uniformly distributed funnel-shaped pores. The core is located below the top layer. The structural design of the above-mentioned utility model is easy to absorb loose stools and other bodily fluids. However, in actual use, it has been found that small particles in loose stools are easily trapped in the pores and accumulate on the surface, resulting in poor absorbency. Utility Model Content

[0005] The main purpose of this invention is to overcome the shortcomings of the prior art and provide a disposable absorbent article with a three-dimensional absorbent core.

[0006] The present invention adopts the following technical solution: A disposable absorbent article includes a body having a longitudinal direction in the length direction and a transverse direction in the width direction. The body includes a liquid-permeable surface layer, an absorbent core, a liquid-impermeable bottom layer, and a leak-proof side panel. The absorbent core comprises a continuous first absorbent portion, a second absorbent portion, and a third absorbent portion. The first and third absorbent portions are symmetrically disposed on opposite transverse sides of the skin surface of the second absorbent portion. An opening is provided between the first and third absorbent portions. The absorbent core is longitudinally divided into a pre-absorption region and a post-absorption region. The pre-absorption region has a first opening. The post-absorption region is provided with a transverse elastic layer. The transverse elastic layer includes an elastic stretching member extending transversely, causing the post-absorption region to form a second opening. The side edges of the second opening are curved, and the maximum transverse width of the second opening is greater than the transverse width of the first opening.

[0007] Specifically, the first absorbent portion and the third absorbent portion are provided with the liquid-permeable surface layer on both the skin surface and the non-skin surface, as well as the second absorbent portion on the skin surface. The transverse elastic layer is disposed between the first absorbent portion and the liquid-permeable surface layer, and between the third absorbent portion and the liquid-permeable surface layer.

[0008] Specifically, the first absorption portion and the third absorption portion are joined together by a joining region, which includes a first joining region, a second joining region, and a third joining region. The longitudinal length of the first joining region is not greater than the longitudinal length of the second joining region and the third joining region.

[0009] Specifically, in the length direction, the transverse elastic layer is located between the second bonding region and the third bonding region.

[0010] Specifically, in the length direction, the absorbent core has a first transverse axis and a second transverse axis. The first transverse axis is located at 1 / 2 of the longitudinal length of the absorbent core, and the second transverse axis is located at 1 / 4 of the longitudinal length of the absorbent core from the free end of the rear side. The transverse elastic layer is located between the first transverse axis and the second transverse axis.

[0011] Specifically, the post-absorption region further includes a weakly elastic layer, which is disposed on the non-skin surface of the second absorption portion.

[0012] Specifically, the lateral width of the first absorption portion and the third absorption portion is no greater than 50% of the lateral width of the second absorption portion.

[0013] As can be seen from the above description of this utility model, compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a folding process to create a three-dimensional structure in the absorbent core. With the help of the joining area and the elastic stretching body, the front absorption area has a narrow first opening, and the rear absorption area has a wide second opening. When urine enters through the first opening, it automatically diffuses and is absorbed to both sides. When loose stool enters through the second opening, it is guided to a specific area, achieving dual absorption of both urine and loose stool. This reduces the risk of leakage, while maintaining the dryness of the surface layer, minimizing the contact time between excrement and skin, reducing skin irritation, and improving the user experience. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of this embodiment; Figure 2 This is a schematic diagram of the planar structure of this embodiment; Figure 3 This is a schematic diagram of the planar structure of the absorber core in this embodiment; Figure 4 for Figure 3 AA section view; Figure 5 This is a schematic diagram of the planar structure of the absorbent core in this embodiment, wherein the transverse elastic layer is in a stretched state; Figure 6 for Figure 5 BB cross-sectional view; Figure 7 for Figure 5 CC section view; Figure 8 This is a schematic diagram of the manufacturing process of this embodiment.

[0015] Figure label: Body 10, pre-absorption zone I, post-absorption zone II, first transverse axis Z, second transverse axis S, liquid-permeable surface layer 1, absorbent core 2, first absorbent part 21, second absorbent part 22, third absorbent part 23, bonding area 24, first bonding area 241, second bonding area 242, third bonding area 243, liquid-impermeable bottom layer 3, leak-proof partition 4, transverse elastic layer 51, elastic stretching body 510, weak elastic layer 52, first opening 61, second opening 62. Detailed Implementation

[0016] The present invention will be further described below through specific embodiments.

[0017] refer to Figure 1-7As shown, a disposable absorbent article, specifically a pull-up diaper with improved absorbency and leak-proof performance according to this embodiment, is included. The body 10 has a longitudinal direction in its length and a transverse direction in its width. In the longitudinal direction, the body 10 has a front side near the abdomen and a rear side near the buttocks, as well as a skin side and a non-skin side opposite to the skin side.

[0018] The main body includes a liquid-permeable surface layer 1, an absorbent core 2, a liquid-impermeable bottom layer 3, and a leak-proof partition 4.

[0019] The absorbent core 2 uses a widened, thin absorbent paper core and includes a first absorbent part 21, a second absorbent part 22, and a third absorbent part 23. A liquid-permeable surface layer is provided on the skin surface and non-skin surface of the first absorbent part 21 and the third absorbent part 23, as well as on the skin surface of the second absorbent part 22. That is, after the absorbent core 2 is covered by the liquid-permeable surface layer 1, the first absorbent part 21 and the third absorbent part 23 are folded towards the skin side onto the skin surface of the second absorbent part 22.

[0020] The lateral width of the first absorbent portion 21 and the third absorbent portion 23 is no more than 50% of the lateral width of the second absorbent portion 22. An opening is formed between the free end of the first absorbent portion 21 and the free end of the third absorbent portion 23 after folding. The first absorbent portion 21 and the corresponding non-skin surface liquid-permeable layer 1 and the third absorbent portion 23 and the corresponding non-skin surface liquid-permeable layer 1 are joined together with the second absorbent portion 22 and the corresponding skin surface liquid-permeable layer 1 through the joining area 24.

[0021] like Figure 3 and Figure 4 As shown, the absorber core 2 is longitudinally divided into a pre-absorption region I and a post-absorption region II. The pre-absorption region I has a first opening 61, and the post-absorption region II is provided with a transverse elastic layer 51. The transverse elastic layer 51 includes an elastic stretching body 510 extending laterally, which causes the post-absorption region II to form a second opening 62. The side edges of the second opening 62 are curved, and the maximum transverse width of the second opening 62 is greater than the transverse width of the first opening 61. Specifically, under the action of the bonding region 24 and the elastic stretching body 510, the transverse width of the second opening 62 gradually increases and then gradually decreases from the second bonding region 242 towards the third bonding region 243, presenting an elliptical or circular shape.

[0022] like Figure 5 , Figure 6 and Figure 7As shown, the transverse elastic layer 51 is disposed between the first absorbent portion 21 and the liquid-permeable surface layer 1, and between the third absorbent portion 23 and the liquid-permeable surface layer 1. In this embodiment, in the folded state, the transverse elastic layer 51 is disposed on the skin surface of the first absorbent portion 21 and the non-skin surface of the liquid-permeable surface layer 1, and on the skin surface of the third absorbent portion 23 and the non-skin surface of the liquid-permeable surface layer 1.

[0023] Specifically, the post-absorption region II further includes a weakly elastic layer 52, which is disposed on the non-skin surface of the second absorbent portion 23. In this embodiment, the transverse elastic layer 51 and the weakly elastic layer 52 are continuous. The weakly elastic layer 52 includes an elastic stretcher 510 extending laterally, and the elasticity of the weakly elastic layer 52 is weaker than that of the transverse elastic layer 51, so as to ensure that the second absorbent portion 22 has a weaker tendency to shrink or even does not shrink after the weakly elastic layer 52 is bonded to the absorbent core 2. In this embodiment, the desired design is achieved by using a point-discontinuity design for the weakly elastic layer 52.

[0024] Specifically, the joint area 24 includes a first joint area 241, a second joint area 242, and a third joint area 243, wherein the longitudinal length of the first joint area 241 is not greater than the longitudinal length of the second joint area 242 and the third joint area 243.

[0025] Specifically, in the length direction, the transverse elastic layer 51 and the weak elastic layer 52 are located between the second bonding region 242 and the third bonding region 243. In this embodiment, the transverse elastic layer 51 and the weak elastic layer 52 have a certain longitudinal distance from the second bonding region 242 and the third bonding region 243.

[0026] Specifically, in the length direction, the absorbent core 2 has a first transverse axis Z and a second transverse axis S. The first transverse axis Z is located at 1 / 2 of the longitudinal length of the absorbent core, and the second transverse axis S is located at 1 / 4 of the longitudinal length of the absorbent core from the free end of the rear side. The transverse elastic layer 51 and the weak elastic layer 52 are located between the first transverse central axis Z and the second transverse axis S.

[0027] like Figure 8 The manufacturing process steps shown are as follows: After the absorbent core 2 is formed, the transverse elastic layer 51 and the weak elastic layer 52 are bonded between the first transverse central axis Z and the second transverse axis S, and the part of the elastic stretching body at the weak elastic layer 52 is broken by the point breaking mechanism. The liquid-permeable surface layer 1 wraps around the absorbent core 2, the transverse elastic layer 51, and the weakly elastic layer 52 in reverse. Apply adhesive to the 24 joint areas inside the fold line. After the absorbent core is folded, the opening faces the skin side to form a semi-finished absorbent core. The absorbent core semi-finished product is combined with an impermeable bottom layer 3 and a leak-proof partition 4 to form a composite material. Figure 1, Figure 2 The finished diaper shown.

[0028] The above are only a few specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A disposable absorbent article comprising a body having a longitudinal direction of length and a transverse direction of width, the body comprising a liquid-permeable topsheet, an absorbent core, a liquid-impermeable backsheet, and a leakage-preventing barrier leg, characterized in that: The absorbent core includes a continuous first absorbent portion, a second absorbent portion, and a third absorbent portion. The first absorbent portion and the third absorbent portion are symmetrically arranged on both sides of the skin surface of the second absorbent portion. An opening is provided between the first absorbent portion and the third absorbent portion. The absorbent core is divided into a pre-absorption region and a post-absorption region in a longitudinal direction. The pre-absorption region has a first opening. The post-absorption region is provided with a transverse elastic layer. The transverse elastic layer includes an elastic stretching body extending in the transverse direction, which makes the post-absorption region form a second opening. The side edge of the second opening is curved, and the maximum transverse width of the second opening is greater than the transverse width of the first opening.

2. A disposable absorbent article according to claim 1, characterized in that: The first absorbent portion and the third absorbent portion are provided with the liquid-permeable surface layer on the skin surface and non-skin surface, as well as the second absorbent portion on the skin surface. The transverse elastic layer is disposed between the first absorbent portion and the liquid-permeable surface layer, and between the third absorbent portion and the liquid-permeable surface layer.

3. A disposable absorbent article according to claim 2, characterized in that: The first absorption portion and the third absorption portion are joined together by a joining region. The joining region includes a first joining region, a second joining region, and a third joining region. The longitudinal length of the first joining region is not greater than the longitudinal length of the second joining region and the third joining region.

4. A disposable absorbent article according to claim 3, characterized in that: In the longitudinal direction, the transverse elastic layer is located between the second bonding region and the third bonding region.

5. A disposable absorbent article according to claim 4, characterized in that: In the length direction, the absorbent core has a first transverse axis and a second transverse axis. The first transverse axis is located at 1 / 2 of the longitudinal length of the absorbent core, and the second transverse axis is located at 1 / 4 of the longitudinal length of the absorbent core from the free end of the rear side. The transverse elastic layer is located between the first transverse axis and the second transverse axis.

6. A disposable absorbent article according to claim 5, characterized in that: The post-absorption region also includes a weakly elastic layer, which is disposed on the non-skin surface of the second absorption portion.

7. A disposable absorbent article according to any of claims 1-6, characterized in that: The lateral width of the first absorption portion and the third absorption portion is not greater than 50% of the lateral width of the second absorption portion.

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