A type of diaper

Abstract

This utility model relates to the field of disposable hygiene products technology, and in particular to a diaper. It mainly solves the problems of poor fit and poor leakage prevention in existing diapers. The diaper body includes a diaper body with a front waist area, a crotch area, and a back waist area distributed sequentially along the longitudinal direction. The diaper body includes a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer stacked sequentially from top to bottom. The two transverse sides of the liquid-impermeable bottom layer located in the crotch area are folded upward to form an outer water-repellent barrier. At least two parallel first elastic bands are attached to the folded edges of the outer water-repellent barrier. The stretch ratio of the first elastic bands is 2 to 4 times. The absorbent core layer is attached to the upper surface of the liquid-impermeable bottom layer. A first elastic shrink band and a second elastic shrink band are provided between the absorbent core layer and the liquid-impermeable bottom layer.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products technology, and in particular to a diaper. Background Technology

[0002] As a widely used baby and adult care product, the performance of disposable diapers directly affects the user's comfort and health. Traditional disposable diapers often have limitations in their structural design, leading to problems such as side leakage and uneven absorption during use. For example, the leak-proof structure of ordinary disposable diapers is usually relatively simple, making it difficult to effectively prevent liquid from leaking from the sides; the absorbent core has limited absorption and water-locking capacity, failing to quickly disperse and lock in liquid, easily causing localized dampness and skin discomfort; at the same time, the overall fit and three-dimensional leak-proof effect of disposable diapers need improvement, failing to adapt well to the different body shapes and activity needs of users. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model provides a diaper that mainly solves the problems of poor fit and poor leakage prevention in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A diaper includes a diaper body, defined as extending longitudinally along the length direction and laterally along the width direction. The diaper body has a front waist area, a crotch area, and a back waist area sequentially distributed along the longitudinal direction. The diaper body includes a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer stacked sequentially from top to bottom. The two lateral sides of the liquid-impermeable bottom layer located in the crotch area are folded upward to form an outer water-repellent barrier. At least two parallel first elastic bands are laminated at the folded edges of the outer water-repellent barrier. The stretch ratio of the first elastic bands is 2 to 4 times. The absorbent core layer is laminated on the upper surface of the liquid-impermeable bottom layer. On the surface, a first elastic contraction band and a second elastic contraction band are provided between the absorbent core layer and the liquid-impermeable bottom layer. Both the first elastic contraction band and the second elastic contraction band are distributed in the transverse direction. The first elastic contraction band is distributed between the front waist area and the crotch area, and the transverse ends of the first elastic contraction band are respectively connected to the front ends of the two outer water-repellent guards. The second elastic contraction band is distributed between the crotch area and the back waist area, and the transverse ends of the second elastic contraction band are respectively connected to the rear ends of the two outer water-repellent guards. The first elastic contraction band, the second elastic contraction band and the outer water-repellent guards form a three-dimensional leak-proof cavity. The height of the three-dimensional leak-proof cavity in its natural state is 1.2cm to 3cm.

[0006] Furthermore, the liquid-permeable surface layer includes a hydrophilic nonwoven fabric covering the upper surface and two transverse sides of the absorbent core layer, a hydrophobic nonwoven fabric fixedly connected to the two transverse sides of the hydrophilic nonwoven fabric, and a second elastic band. The transverse outer side of the hydrophobic nonwoven fabric is folded upward to form a leak-proof partition. The second elastic band is composited at the folded edge of the leak-proof partition. The lower part of the leak-proof partition is compositely connected to the first elastic shrink band and the second leak-proof shrink band, respectively.

[0007] Furthermore, the absorbent core layer comprises, from top to bottom, a flow-guiding layer, a superabsorbent polymer layer, and a water-locking diffusion layer. A hydrophobic membrane is disposed between the superabsorbent polymer layer and the water-locking diffusion layer. The hydrophobic membrane has a plurality of through-holes arranged in a matrix and having a diameter of 0.5 mm to 1 mm, with a density of 12 to 24 through-holes / cm². 2 .

[0008] Furthermore, the water-locking diffusion layer comprises at least 60% by weight of superabsorbent polymer particles and wood pulp fibers.

[0009] Furthermore, the absorbent core layer has a flow-guiding groove in the middle of its transverse direction. The flow-guiding groove extends in a wavy shape along the longitudinal direction, and the depth of the flow-guiding groove is 1 / 3 to 1 / 2 of the thickness of the absorbent core layer.

[0010] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This diaper divides the diaper body into a front waist area, a crotch area, and a back waist area in the longitudinal direction. This division conforms to the principles of ergonomics. Combined with the first and second elastic contraction bands, the first and second elastic contraction bands can better fit the user's body curves when contracted, providing targeted support and protection in different areas, improving wearing comfort. The liquid-permeable surface layer can quickly guide liquid into the absorbent core layer, keeping the user's skin dry; the absorbent core layer effectively absorbs and stores liquid; the liquid-impermeable bottom layer prevents liquid leakage, ensuring a clean environment. At the same time, the two horizontal sides of the liquid-impermeable bottom layer located in the crotch area are folded upward to form an outer water-repellent protective barrier, and at least two parallel first elastic bands are laminated at the folded edges. The stretch ratio of the first elastic bands is 2 to 4 times. The diaper's leak-proof capability on both sides has been enhanced. The elasticity of the first elastic band allows the side guards to fit snugly against the user's legs, effectively preventing liquid leakage. At the same time, the appropriate stretch ratio ensures comfort and avoids excessive restriction on the user's legs. Furthermore, a first elastic shrink band and a second elastic shrink band are set in the horizontal direction between the absorbent core and the liquid-proof bottom layer. They are distributed between the front waist area and the crotch area, and between the crotch area and the back waist area, respectively. Both ends are connected to the outer water-repellent side guards to form a three-dimensional leak-proof cavity. The height of this cavity in its natural state is 1.2cm to 3cm, which ensures that the three-dimensional leak-proof cavity always maintains a certain space to effectively contain and prevent liquid leakage, further improving the diaper's leak-proof performance. Attached Figure Description

[0011] Figure 1 This is a top view of an embodiment of the present invention.

[0012] Figure 2 This is a schematic diagram of the distribution structure of the liquid-impermeable bottom layer, the first elastic shrinkage band, and the second elastic shrinkage band in an embodiment of this utility model;

[0013] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0014] Figure 4 This is a schematic diagram of the hydrophobic membrane structure in an embodiment of this utility model. Detailed Implementation

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0016] The embodiment of this utility model is as follows:

[0017] refer to Figure 1 , Figure 2 and Figure 3As shown, a diaper includes a diaper body 1, defined as extending longitudinally along the length direction and laterally along the width direction. The diaper body 1 has a front waist area 101, a crotch area 102, and a back waist area 103 arranged sequentially along the longitudinal direction. The diaper body 1 includes a liquid-permeable top layer 11, an absorbent core layer 12, and a liquid-impermeable bottom layer 13 stacked sequentially from top to bottom. The liquid-impermeable bottom layer 13 has its two lateral sides at the crotch area 102 folded upwards to form an outer water-repellent barrier 2. Two parallel first elastic bands 3 are attached to the folded edges of the outer water-repellent barrier 2. The stretch ratio of the first elastic bands 3 is 2 to 4 times, preferably 2.4 times. The absorbent core layer 12 is attached to the upper surface of the liquid-impermeable bottom layer 13. A first elastic shrink band 4 and a second elastic shrink band 5 are provided between the liquid-permeable bottom layer 13. The first elastic shrink band 4 and the second elastic shrink band 5 are both distributed in the transverse direction. The first elastic shrink band 4 is distributed between the front waist area 101 and the crotch area 102, and the two transverse ends of the first elastic shrink band 4 are respectively connected to the front ends of the two outer water-repellent guards 2. The second elastic shrink band 5 is distributed between the crotch area 10 and the back waist area 103, and the two transverse ends of the second elastic shrink band 5 are respectively connected to the rear ends of the two outer water-repellent guards 2. The first elastic shrink band 4, the second elastic shrink band 5 and the outer water-repellent guards 2 form a three-dimensional leak-proof cavity 6. The height of the three-dimensional leak-proof cavity 6 in its natural state is 1.2cm to 3cm, preferably 1.6cm. The first elastic shrink band 4 and the second elastic shrink band 5 are both elastic non-woven fabrics.

[0018] This diaper divides the diaper body 1 longitudinally into a front waist area 101, a crotch area 102, and a back waist area 103. This division conforms to ergonomic principles. Combined with the first elastic contraction band 4 and the second elastic contraction band 5, the first and second elastic contraction bands can better conform to the user's body curves when contracted, providing targeted support and protection in different areas and improving wearing comfort. The liquid-permeable surface layer 11 can quickly guide liquid into the absorbent core layer 12 to keep the user's skin dry; the absorbent core layer 12 effectively absorbs and stores liquid; the liquid-impermeable bottom layer 13 prevents liquid leakage and ensures a clean environment. At the same time, the two horizontal sides of the liquid-impermeable bottom layer 13 located in the crotch area 102 are folded upward to form an outer water-repellent protective barrier 2, and at least two parallel first elastic bands 3 are laminated at the folded edges. The stretch ratio of the first elastic bands 3 is 2 to 4 times. The diaper's leak-proof capability on both sides has been enhanced. The elasticity of the first elastic band 3 allows the side guards to fit snugly against the user's legs, effectively preventing liquid leakage. At the same time, the appropriate stretch ratio ensures comfort and avoids excessive restriction on the user's legs. Furthermore, a first elastic shrink band 4 and a second elastic shrink band 5 are provided in the transverse direction between the absorbent core layer 12 and the liquid-proof bottom layer 13. They are respectively distributed between the front waist area 101 and the crotch area 102 and between the crotch area 102 and the back waist area 103, and their ends are connected to the outer water-repellent side guards 2 to form a three-dimensional leak-proof cavity 6. The cavity has a height of 1.2cm to 3cm in its natural state, which ensures that the three-dimensional leak-proof cavity 6 always maintains a certain space, effectively accommodating and preventing liquid overflow, further improving the diaper's leak-proof performance.

[0019] Specifically, the liquid-permeable surface layer 11 includes a hydrophilic nonwoven fabric 111 covering the upper surface and two transverse sides of the absorbent core layer 12, a hydrophobic nonwoven fabric 112 fixedly connected to the two transverse sides of the hydrophilic nonwoven fabric 111, and a second elastic band 113. The transverse outer side of the hydrophobic nonwoven fabric 112 is folded upward to form a leak-proof partition 7. The second elastic band 113 is attached to the folded edge of the leak-proof partition 7. The lower part of the leak-proof partition 7 is respectively attached to the first elastic shrink band 4 and the second leak-proof shrink band 5, which enhances the leak-proof capability of the diaper on both transverse sides. The leak-proof partition 7 can fit tightly to the user's legs. The second elastic band 113 provides elastic support to prevent liquid from leaking from the sides. At the same time, the connection with the elastic shrink band makes the overall structure more stable and improves the reliability of the leak-proof effect.

[0020] refer to Figure 4As shown, in this embodiment, the absorbent core layer 12 comprises, from top to bottom, a flow guiding layer 121, a superabsorbent polymer layer 122, and a water-locking diffusion layer 123. The flow guiding layer 121 is formed by aggregated wood pulp fiber material. A hydrophobic membrane 124 is provided between the superabsorbent polymer layer 122 and the water-locking diffusion layer 123. The hydrophobic membrane 124 has a plurality of through holes 8 arranged in a matrix and having a diameter of 0.5 mm to 1 mm, preferably 0.8 mm. The density of the through holes 8 is 12 to 24 per cm. 2 The preferred value is 16 per cm. 2 This allows the liquid to be quickly introduced and dispersed. The superabsorbent polymer layer 122 has a strong water absorption capacity and can quickly absorb a large amount of liquid. The water-locking diffusion layer 123 evenly diffuses and locks the absorbed liquid, preventing liquid backflow and improving the overall absorption and water-locking performance of the absorbent core layer 12. In addition, the hydrophobic membrane 124 can prevent the liquid from flowing randomly between the two layers, allowing the liquid to diffuse regularly through the through holes, improving the absorption and distribution efficiency of the absorbent core layer 12, while ensuring the structural stability of the absorbent core layer.

[0021] Furthermore, the water-locking diffusion layer 123 comprises 65% by weight of superabsorbent polymer particles and 35% by weight of wood pulp fiber. The superabsorbent polymer particles have extremely high water absorption capacity, which can quickly absorb and lock in a large amount of liquid. The wood pulp fiber has good air permeability and dispersibility, which can evenly disperse the liquid in the water-locking diffusion layer while maintaining a certain air circulation, reducing stuffiness, and improving the comfort of the user's skin. Moreover, the two work together to further enhance the water-locking performance of the absorbent core layer and prevent liquid backflow.

[0022] Furthermore, the absorbent core layer 12 has a flow-guiding groove 9 in the transverse middle. The flow-guiding groove 9 extends in a wave shape in the longitudinal direction. The depth of the flow-guiding groove 9 is 1 / 3 to 1 / 2 of the thickness of the absorbent core layer 12, preferably 1 / 3. The wave-shaped flow-guiding groove 12 can guide the liquid to spread rapidly in the longitudinal direction within the absorbent core layer, increasing the absorption area of ​​the liquid and enabling the absorbent core layer to play a more complete role. It avoids the accumulation of liquid in local areas, improves absorption efficiency and uniformity, and the appropriate depth design ensures the flow-guiding effect without affecting the overall strength and structural stability of the absorbent core layer.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A diaper, characterized in that: The diaper includes a diaper body, defined as extending longitudinally along its length and laterally along its width. The diaper body has a front waist area, a crotch area, and a back waist area sequentially distributed along the longitudinal direction. The diaper body comprises a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer, stacked sequentially from top to bottom. The two lateral sides of the liquid-impermeable bottom layer located in the crotch area are folded upwards to form an outer water-repellent barrier. At least two parallel first elastic bands are attached to the folded edges of the outer water-repellent barrier. The stretch ratio of the first elastic bands is 2 to 4 times. The absorbent core layer is attached to the upper surface of the liquid-impermeable bottom layer. A first elastic contraction band and a second elastic contraction band are provided between the absorbent core layer and the liquid-impermeable bottom layer. Both the first and second elastic contraction bands are distributed in the transverse direction. The first elastic contraction band is distributed between the front waist area and the crotch area, and the two transverse ends of the first elastic contraction band are respectively connected to the front ends of the two outer water-repellent guards. The second elastic contraction band is distributed between the crotch area and the back waist area, and the two transverse ends of the second elastic contraction band are respectively connected to the rear ends of the two outer water-repellent guards. The first elastic contraction band, the second elastic contraction band and the outer water-repellent guards form a three-dimensional leak-proof cavity. The height of the three-dimensional leak-proof cavity in its natural state is 1.2cm to 3cm.

2. The diaper according to claim 1, characterized in that: The liquid-permeable surface layer includes a hydrophilic nonwoven fabric covering the upper surface and two transverse sides of the absorbent core layer, a hydrophobic nonwoven fabric fixedly connected to the two transverse sides of the hydrophilic nonwoven fabric, and a second elastic band. The transverse outer side of the hydrophobic nonwoven fabric is folded upward to form a leak-proof partition. The second elastic band is composited at the folded edge of the leak-proof partition. The lower part of the leak-proof partition is compositely connected to the first elastic shrink band and the second leak-proof shrink band, respectively.

3. The diaper according to claim 1 or 2, characterized in that: The absorbent core layer comprises, from top to bottom, a flow-guiding layer, a superabsorbent polymer layer, and a water-locking diffusion layer. A hydrophobic membrane is disposed between the superabsorbent polymer layer and the water-locking diffusion layer. The hydrophobic membrane has a plurality of through-holes arranged in a matrix with a diameter of 0.5 mm to 1 mm, and the density of the through-holes is 12 to 24 per cm³. 2 .

4. The diaper according to claim 3, characterized in that: The water-locking diffusion layer comprises at least 60% by weight of superabsorbent polymer particles and wood pulp fibers.

5. The diaper according to claim 4, characterized in that: A flow-guiding groove is provided in the transverse middle of the absorbent core layer. The flow-guiding groove extends in a wavy shape in the longitudinal direction, and the depth of the flow-guiding groove is the thickness of the absorbent core layer. 1 / 3~ 1 / 2.

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