Trousers-shaped absorption product

Abstract

A pants-shaped absorption product is provided with a liquid-permeable surface layer material, a liquid-tight bottom layer material and an absorption core layer which is located between the liquid-permeable surface layer material and the liquid-tight bottom layer material and absorbs and accommodates liquid, and left and right leakage-proof partition edges extending in the longitudinal direction are arranged on the two transverse sides of the disposable absorption product. Each of the left and right leakage-proof separation edges comprises a base part and a free part which is connected to the base part and is positioned at the upper end of the base part, an elastic telescopic piece is arranged in each free part, waist region leakage-proof parts are arranged at two longitudinal ends, and each waist region leakage-proof part is formed by compounding a first layer far away from one side of the absorption core and a second layer close to one side of the absorption core; the hydrophilicity of the second layer is greater than that of the first layer. By means of the design, a certain containing space can be formed when the leakage-proof pocket formed by the waist area leakage-proof component absorbs liquid, and the leakage-proof performance is further improved.

Description

Technical Field

[0001] The present invention relates to disposable absorbent articles, particularly disposable absorbent articles having protective measures for preventing leakage of low-viscosity body exudates. Background Art

[0002] A pant-type absorbent article, such as a disposable diaper, a disposable diaper for infants, a training pant diaper, an adult incontinence product, a menstrual pant, etc., is well known and is composed of a liquid-permeable surface layer on the skin contact side, a liquid-impermeable bottom layer on the non-skin contact side, and a liquid absorbent core layer between the surface layer and the bottom layer, and has a front waist region and a rear waist region, and a crotch region between the front and rear waist regions.

[0003] Such disposable absorbent articles generally include a liquid-impermeable bottom layer material, a liquid-permeable surface layer material, and an absorbent structure disposed therebetween. The sides of the front waist region and the rear waist region can be joined together to form a pant-type absorbent article that can be separated by a waist tape system, or the sides of the front waist region and the rear waist region can be joined together by heat pressing, ultrasonic waves, etc. to form a pant-type absorbent article.

[0004] The main function of the pant-type absorbent article is to absorb and store body excreta such as urine, feces, menstrual blood, etc. By preventing the excreta from leaking out of the absorbent article, the absorbent article aims to prevent the body excreta from soiling or contaminating the clothes of the wearer or the caregiver, or other articles such as bedding that may come into contact with the wearer. The absorbent article gives the wearer a dry feeling.

[0005] In the past, to solve the above problems, a leak prevention system was provided on the body side lining or near the rear waist region. An example is to provide a waist elastic member, and not to adhere a part of the waist leak prevention member closest to the lateral axis of the absorbent article to the body side lining, so that the non-adhesive part of the waist elastic member can provide a leak prevention pocket for the exudates. Although the absorbent article having such a leak prevention member is intended to prevent the exudates from leaking, failures may still occur.

[0006] Therefore, it is desirable to improve the leak prevention system and the leak prevention member of the absorbent article to prevent the exudates from leaking, especially from the waist region of the absorbent article. It is also desirable to improve the leak prevention system to have an increased void volume so as to hold the body exudates until the absorbent article can be replaced. Summary of the Invention

[0007] A pant-type absorbent article provided according to the present invention has a liquid-permeable surface layer material, a liquid-impermeable bottom layer material, and an absorbent core layer that absorbs and holds liquid and is located between the liquid-permeable surface layer material and the liquid-impermeable bottom layer material. At the lateral sides of the disposable absorbent article, there are provided left and right leak-proof side edges extending longitudinally. The left and right leak-proof side edges include a base portion and a free portion connected to the base portion and located at the upper end of the base portion. An elastic telescopic member is provided in the free portion. It is characterized in that leak-proof components for the waist regions are provided at both longitudinal ends. The leak-proof components for the waist regions are formed by laminating a first layer on the side away from the absorbent core and a second layer on the side close to the absorbent core, and the hydrophilicity of the second layer is greater than that of the first layer.

[0008] A pant-type absorbent article provided according to the present invention, the first layer of the leak-proof component for the waist region is a non-woven fabric with weak hydrophilicity, and the second layer is an absorbent material with water absorbency. The first layer is preferably a double-carded non-woven fabric. The hydrophilicity of the side of the first layer close to the second layer is greater than that of the side of the first layer away from the second layer. The second material is one of airlaid paper / hydroentangled non-woven fabric / cotton fabric.

[0009] A pant-type absorbent article provided according to the present invention, a part of the leak-proof component for the waist region is joined to the absorbent main body to form a leak-proof pocket with an opening facing the crotch. The opening edge of the leak-proof pocket is designed in a large arc shape, and the depth in the middle of the width of the leak-proof pocket is the smallest. Optionally, the joining positions of the opening edge of the leak-proof pocket at the lateral sides are designed in small arcs, and there is a protrusion in the opposite direction to the concave shape of the large arc of the opening edge of the leak-proof pocket. The radius of the large arc is greater than twice the radius of the small arc.

[0010] A pant-type absorbent article provided according to the present invention, the leak-proof component for the waist region is joined to the liquid-permeable surface layer of the absorbent main body and / or the left and right leak-proof side edge materials near the waist opening, and the longitudinal edges of the leak-proof component for the waist region are joined to the left and right leak-proof side edge materials.

[0011] A pant-type absorbent article provided according to the present invention, the distance between the joining position of the leak-proof component for the waist region and the edge of the corresponding absorbent core body is 5 - 25 mm.

[0012] A pant-type absorbent article provided according to the present invention, the elastic telescopic range of the elastic telescopic body of the left and right leak-proof side edges extends to a position closer to the waist of the opening edge of the leak-proof pocket formed by the leak-proof component for the waist region.

[0013] According to a pant - type absorbent article provided by the present invention, the structural design of the leak - proof component in the waist region is also optimized. The leak - proof component in the waist region is partially joined to the absorbent main body to form a leak - proof pocket with an opening facing the crotch. This design enables the leak - proof pocket to form a certain accommodation space when absorbing liquid, further improving the leak - proof performance. At the same time, the opening edge of the leak - proof pocket is designed in a large - arc shape, so that when the liquid contacts the opening edge, it can smoothly flow into the interior of the leak - proof pocket, avoiding liquid spillage. The depth in the middle of the width of the leak - proof pocket is the smallest, enabling the leak - proof pocket to distribute pressure more evenly when accommodating liquid, and avoiding excessive accumulation of liquid in a local area, which may lead to spillage.

[0014] In addition, the joining positions of the opening edge of the leak - proof pocket at the transverse two sides are designed with small - arc shapes, and are convex in the opposite direction to the concave large - arc of the opening edge of the leak - proof pocket. This design enables the leak - proof pocket to maintain its shape more stably when being extruded by an external force, avoiding liquid spillage caused by deformation of the opening edge. The radius of the large - arc is greater than twice the radius of the small - arc, enabling the leak - proof pocket to have a certain buffer space when being extruded by an external force, further improving the leak - proof performance.

[0015] By optimizing the leak - proof structure and material combination, the leak - proof effect of the disposable absorbent article of the present invention in the waist region has been significantly improved. At the same time, the present invention also makes the absorbent article more excellent in the overall leak - proof performance by optimizing the design of the leak - proof pocket. This design not only improves the practicality of the product but also enhances the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an unfolded schematic view of the disposable absorbent article of the present invention;

[0017] Figure 2 is Figure 1 a cross - sectional view taken along the direction of G - G of

[0018] Figure 3 is Figure 1 a cross - sectional view taken along the direction of H - H of

[0019] Figure 4 is another unfolded schematic view of the disposable absorbent article of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Now, the present invention will be described with reference to the accompanying drawings. Starting from Figures 1 - 3As shown, a disposable absorbent article is in a long strip shape and is usually placed around the crotch of the wearer during use. The disposable absorbent article has a front waist region, a crotch region, and a rear waist region. When using the disposable absorbent article, the front waist region is set to face the abdominal region of the user and extend downward toward the groin region. Meanwhile, the crotch is set to be basically directly below the crotch of the user, and the rear waist region is set to face the buttocks of the user. The front waist region, the crotch region, and the rear waist region are only relative and there is no dividing line.

[0021] A panty-shaped absorbent article has a liquid-permeable top sheet material 2, a liquid-impermeable bottom sheet material 4, and an absorbent core layer 3 that absorbs and holds liquid and is located between the liquid-permeable top sheet material 2 and the liquid-impermeable bottom sheet material 4. On both lateral sides of the disposable absorbent article, there are left and right leak guards 5 extending longitudinally. The left and right leak guards include a base portion 5a and a free portion 5b connected to the base and located at the upper end of the base. An elastic expansion member 5c is provided in the free portion.

[0022] The liquid-permeable top sheet 2 is set to face the direction of the person using the disposable absorbent article during use, and the liquid-impermeable bottom sheet 4 is set to be away from the user during use, that is, located below the disposable absorbent article. The absorbent core 3 is provided between the liquid-permeable top sheet 2 and the liquid-impermeable bottom sheet 4. The liquid-permeable top sheet 2 is preferably made of a soft non-woven material, and of course, it can also be made of a porous film of a thermoplastic material such as polyethylene or polypropylene. The liquid-impermeable bottom sheet material 4 is selected to be made of a liquid-impermeable material in the form of a film that can prevent liquid penetration, and is preferably made of a breathable film material that can breathe but not allow liquid to pass through. The absorbent core 3 can use synthetic fibers and natural fibers, or fiber combinations. The absorbent core can also be formed by different material layers, or be composed of a single layer with good characteristics of absorbing, diffusing, and storing body fluids. As long as it can absorb and retain body fluids, considering the absorption function and price, it is usually preferred to use a material that mixes absorbent polymer powder in fluffy wood pulp. In order to maintain the shape of the above absorbent core, a sanitary napkin or non-woven material can be selected to wrap it. The components can be connected together by appropriate connection methods, such as using conventional methods such as adhesive bonding, heat pressing, and ultrasonic welding well-known in the field of disposable absorbent articles.

[0023] The three-dimensional leak guards 5 are preferably made of a hydrophobic non-woven material and extend upward from the corresponding longitudinal edges of the absorbent body respectively, so that when using the disposable absorbent article, the leak guards can prevent the leakage of urine and excrement in the left and right directions. The left and right leak guards 5 have a base portion 51 joined to the liquid-permeable top sheet 2, a side wall portion 52 standing up from the base end portion, and a contact portion 53 in contact with the skin. A leak guard elastic expansion member 54 is provided in the contact portion 53 of the leak guard.

[0024] A pant - type absorbent article is provided with waist - region leakage - preventing components 7 at both longitudinal ends. The waist - region leakage - preventing components are partially joined to the absorbent body (the absorbent body refers to other components of the disposable absorbent article in the present invention except the waist - region leakage - preventing components). At least the edge regions of the three side edges 71, 72, 73 of the waist - region leakage - preventing component, except for the side edge 74 facing the longitudinal center position, are joined to the absorbent body to form a leakage - preventing pocket with an opening facing the crotch (as Figure 1 , Figure 3 shown). The waist - region leakage - preventing component 7 can be joined to the outside or inside of the leakage - preventing spacer edge. The waist - region leakage - preventing component 7 can be joined to the outside of the leakage - preventing spacer edge, that is, the waist - region leakage - preventing component 7 is closer to the wearer's skin side than the left and right leakage - preventing spacer edges. The elastic stretching range of the elastic stretchable bodies of the left and right leakage - preventing spacer edges extends to a position closer to the waist of the opening edge 74 of the leakage - preventing pocket formed by the waist - region leakage - preventing component. In this way, the elastic stretch of the elastic stretchable bodies of the left and right leakage - preventing spacer edges can open the leakage - preventing pocket formed by the waist - region leakage - preventing component.

[0025] The waist - region leakage - preventing component 7 is composed of a first layer 7a away from the absorbent core side and a second layer 7b close to the absorbent core side. The hydrophilicity of the second layer 7b is greater than that of the first layer 7a. The first material layer 7a of the waist - region leakage - preventing component is preferably made of a hydrophobic non - woven fabric or a weakly hydrophilic non - woven fabric. As a preference, the first material layer 7a is a double - carded non - woven fabric, and the hydrophilicity of the side of the first material layer 7a close to the second material layer 7b is greater than that of the side of the first material layer 7a away from the second material layer 7b. The second material layer 7b is an absorbent material with a certain water absorption capacity. The second material 7b can be selected from one of the materials with a certain water absorption capacity among dust - free paper / hydroentangled non - woven fabric / cotton fabric. This design enables the leakage - preventing pocket to form a certain accommodation space when absorbing liquid and has a certain absorption capacity, which can further improve the leakage - preventing performance.

[0026] As Figure 4 shown, for the disposable absorbent article, the side 74 of the waist - region leakage - preventing component 7 facing the longitudinal center (crotch region) at both longitudinal ends is designed in an arc shape. The opening edge 74a of the leakage - preventing pocket is designed in a large - arc shape, and the depth in the middle of the width of the leakage - preventing pocket is the smallest. The joining positions 74b on the transverse two sides of the opening edge of the leakage - preventing pocket are designed in small - arc shapes, and there are protrusions in the opposite direction to the concave shape of the large - arc of the opening edge of the leakage - preventing pocket. The radius of the large - arc is greater than twice the radius of the small - arc. At the same time, the opening edge of the leakage - preventing pocket is designed in a large - arc shape, enabling the liquid to flow smoothly into the interior of the leakage - preventing pocket when contacting the opening edge, avoiding liquid spillage. The smallest depth in the middle of the width of the leakage - preventing pocket enables the leakage - preventing pocket to distribute pressure more evenly when accommodating liquid, avoiding excessive accumulation of liquid in a local area and resulting in spillage.

[0027] In Figure 4Among them, the leakage prevention component in the waist area is joined to the liquid-permeable surface layer of the absorbent body and / or the left and right leakage prevention side materials near one side 72 of the waist opening. The longitudinal edges 71 and 73 of the leakage prevention component in the waist area are joined to the left and right leakage prevention side materials. The distance between the joining position 72 of the leakage prevention component in the waist area and the edge 3A of the corresponding absorbent core is 5-25 mm. It can be understood that the position where the edge area 72 of the leakage prevention component in the waist area is joined to the absorbent body is closer to the waist opening position than the edges 3A at the longitudinal two ends of the absorbent core.

[0028] The present invention has been described in relatively detail in combination with the embodiments above, but this does not constitute a limitation to the content of the present invention. Modifications and variations made under the same concept all fall within the scope of protection of the present invention.

Claims

1. A pant-type absorbent product, comprising a liquid-permeable surface material, a liquid-impermeable bottom material, and an absorbent core layer for absorbing and containing liquid between the liquid-permeable surface material and the liquid-impermeable bottom material, wherein left and right leak-proof edges extending in the longitudinal direction are arranged on both lateral sides of the disposable absorbent product, the left and right leak-proof edges comprising a base and a free portion connected to the base and located at the upper end of the base, wherein an elastic stretchable member is arranged in the free portion, characterized in that Waist area leakage-proof components are arranged at both longitudinal ends. The waist area leakage-proof components are composed of a first layer away from the absorbent core and a second layer close to the absorbent core. The hydrophilicity of the second layer is greater than that of the first layer.

2. A pant-type absorbent product according to claim 1, characterized in that The first material layer of the waist area leakage-proof component is a weakly hydrophilic nonwoven fabric, and the second material layer is an absorbent material with a certain water absorbency.

3. A pant-type absorbent product according to claim 1, characterized in that: The first material layer is a double-combed non-woven fabric, the hydrophilicity of the side of the first material layer close to the second material layer is greater than the hydrophilicity of the side of the first material layer far from the second material layer, and the second material is a material with certain water absorption such as dust-free paper / spunlace cloth / pure cotton cloth.

4. A pant-type absorbent product according to claim 1, characterized in that: The waist leakage-proof component is partially joined to the absorbent body to form a leakage-proof pocket opening toward the crotch.

5. A pant-type absorbent product according to claim 1, characterized in that: The opening edge of the leak-proof pocket is designed in a large arc shape, and the depth in the middle of the leak-proof pocket width is the smallest.

6. A pant-type absorbent product according to claim 5, characterized in that: The opening edge of the leakproof bag is designed with a small arc at the joint position on both sides of the horizontal direction, and is convex in the opposite direction of the large arc concave shape of the opening edge of the leakproof bag, and the radius of the large arc is greater than 2 times the radius of the small arc.

7. A pant-type absorbent product according to claim 4, characterized in that: The waist leakage-proof component is joined to the liquid-permeable surface layer and / or the left and right leakage-proof edge materials of the absorbent body at one side close to the waist opening, and the longitudinal edges of the waist leakage-proof component are joined to the left and right leakage-proof edge materials.

8. A pant-type absorbent product according to claim 6, characterized in that: The distance between the joining position of the waist leakage-proof component and the edge of the corresponding absorbent core is 5-25 mm.

9. A pant-type absorbent product according to claim 4, characterized in that: The elastic expansion range of the elastic expansion body of the left and right leak-proof partition edges extends to the opening edge of the leak-proof pocket formed by the waist leak-proof component, which is closer to the waist opening position.

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