A side leakage preventing pant-type diaper

Abstract

The utility model relates to a disposable sanitary article field especially relates to a side leakage prevention effect is good and adapts to the dynamic activity demand of different body shape user's side leakage prevention trousers type paper diaper, and the absorbent body includes the liquid -permeable surface layer, the absorption core layer and the impermeable bottom layer of the laminated arrangement from top to bottom in proper order, the liquid -permeable surface layer includes the hydrophilic non -woven fabric and distributes the hydrophobic non -woven fabric of the fixed in the hydrophilic non -woven fabric transverse both sides, the hydrophilic non -woven fabric adheres on the upper surface of absorption core layer and the transverse both sides of absorption core layer, and with the adhesion of absorption core layer on the impermeable bottom layer, the transverse outside of hydrophobic non -woven fabric forms first leakproof baffle and second leakproof baffle through folding, the second leakproof baffle is distributed in the transverse outside of first leakproof baffle, and the height size of second leakproof baffle is greater than the height size of first leakproof baffle, and the free end of first leakproof baffle has inlayed first elastic rubber, and the free end of second leakproof baffle has inlayed second elastic rubber.

Description

Technical Field

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

[0002] The structure of a pant-style diaper generally consists of an absorbent core and a fabric layer laminated to its outer surface. The upper and lower ends of the fabric layer are flipped together and welded together at both ends to form the pant-style diaper. The absorbent core, from top to bottom, comprises a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer, all stacked together. The absorbent core layer is made of a combination of fluffy nonwoven fabric and superabsorbent polymer (SAP), or a mixture of wood pulp fiber and SAP and wrapped with nonwoven fabric, forming a block structure for absorbing and retaining bodily excrement. The liquid-permeable top layer consists of hydrophilic nonwoven fabric and hydrophobic nonwoven fabric fixed to both sides of the hydrophilic nonwoven fabric, providing a comfortable and dry feel when in contact with the body, while allowing liquid to pass freely into the lower absorbent core layer. The liquid-impermeable bottom layer is made of a breathable, water-impermeable membrane and hydrophobic nonwoven fabric, used to retain absorbed liquid within the absorbent core layer, thus preventing the absorbed liquid from soiling the wearer's pants.

[0003] Based on the existing structure of pant-style diapers, there are two main leak-proof parts. One is an elastic band on the clothing layer around the opening for the legs to pass through. The elastic band tightens the clothing layer and adheres to the skin. The other is the leak-proof side panel on the absorbent core. Because the elastic band is prone to gaps due to uneven pressure distribution after absorbing liquid in the absorbent layer, liquid can easily leak from the side. In addition, the contact surface between the three-dimensional protective barrier and the legs is a single-layer structure, which cannot adapt to the dynamic activity needs of users with different body types. Summary of the Invention

[0004] Therefore, in view of the above problems, this utility model provides a leak-proof diaper with good anti-leakage effect and adaptable to the dynamic activity needs of users of different body types.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A leak-proof diaper includes a diaper body, which includes an absorbent core and a fabric layer laminated to its outer side. The absorbent core includes a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer stacked sequentially from top to bottom. The longitudinal direction is defined as extending along the length of the absorbent core, and the transverse direction is defined as extending along the width of the absorbent core. The absorbent core layer includes a top nonwoven fabric, a bottom nonwoven fabric, and an absorbent layer with absorbent material disposed between the top and bottom nonwoven fabrics. The absorbent layer has an upper and lower edge distributed at both ends of the longitudinal direction and a left and right edge distributed at both ends of the transverse direction. The absorbent layer has at least two slits without absorbent material, each slit being distributed along the longitudinal direction, and the longitudinal ends of the slits being connected to the upper and lower edges, respectively. The top and bottom nonwoven fabrics are laminated and connected at the slits to form a drainage channel.

[0007] The liquid-permeable surface layer includes a hydrophilic nonwoven fabric and a hydrophobic nonwoven fabric distributed and fixed on both sides of the hydrophilic nonwoven fabric. The hydrophilic nonwoven fabric adheres to the upper surface of the absorbent core layer and the two sides of the absorbent core layer, and adheres to the impermeable bottom layer together with the absorbent core layer. The outer sides of the hydrophobic nonwoven fabric are folded to form a first leak-proof edge and a second leak-proof edge. The second leak-proof edge is distributed on the outer side of the first leak-proof edge. The height of the second leak-proof edge is greater than the height of the first leak-proof edge. A first elastic band is embedded in the free end of the first leak-proof edge, and a second elastic band is embedded in the free end of the second leak-proof edge.

[0008] Furthermore, the absorbent layer has 3 to 5 slits, the lateral spacing between each slit is 1.5 to 3 cm, and the slit width is 0.2 to 0.5 cm; the top nonwoven fabric and the bottom nonwoven fabric are connected at the slits by ultrasonic welding or hot melt adhesive dot bonding.

[0009] Furthermore, the height of the first leak-proof edge is 2-3cm, and the height of the second leak-proof edge is 4-6cm.

[0010] Furthermore, the absorbent layer is also provided with several transversely arranged embossed grooves, the depth of which is 0.1 to 0.3 mm.

[0011] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This anti-leakage diaper, by setting longitudinal slits in the absorbent layer to form a flow channel, guides the liquid to quickly diffuse into the absorbent core layer, avoiding side leakage caused by local saturation; at the same time, double-layer leak-proof sidewalls are set on both sides of the liquid-permeable surface layer, namely: a first leak-proof sidewall and a second leak-proof sidewall, forming a physical barrier, and the double protection significantly reduces the risk of side leakage. In addition, during use, the absorbent core layer can form a folding effect along the flow channel, so that the absorbent body fits the skin better, thereby making the first leak-proof sidewall and the second leak-proof sidewall fit well and adapt to the dynamic activity needs of users of different body types. At the same time, the second leak-proof sidewall is higher than the first leak-proof sidewall, adapting to the leg contours of users of different body types. With the contraction force of the elastic band, it achieves a continuous fit with the legs during exercise, solving the problem that existing single-layer protective barriers are prone to gaps due to dynamic activities. The hydrophobic non-woven fabric is folded to form leak-proof sidewalls, reducing direct contact between hard materials and the skin, reducing friction and irritation, and making it suitable for long-term wear. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0013] Figure 2 This is a top view of the unfolded diaper body in an embodiment of this utility model.

[0014] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure at point AA. 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 leak-proof diaper includes a diaper body 100, which includes an absorbent core 1 and a fabric layer 2 laminated to its outer side. The absorbent core 1 includes a liquid-permeable top layer 11, an absorbent core layer 12, and a liquid-impermeable bottom layer 13, which are stacked sequentially from top to bottom. The longitudinal direction is defined as extending along the length of the absorbent core 1, and the transverse direction is defined as extending along the width of the absorbent core 1. The absorbent core layer 12 includes a top nonwoven fabric 121, a bottom nonwoven fabric 122, and a layer of nonwoven fabric disposed between the top nonwoven fabric 121 and the bottom nonwoven fabric 122. The absorbent layer 12 with absorbent material between 22 has an upper edge 101 and a lower edge 102 distributed at both ends in the longitudinal direction, and a left edge 103 and a right edge 104 distributed at both ends in the transverse direction. The absorbent layer 123 is provided with at least two slits 3 without absorbent material, preferably four slits. Each slit 3 is distributed in the longitudinal direction, and the two ends of the longitudinal direction of the slit 3 are respectively connected to the upper edge 101 and the lower edge 102. The top nonwoven fabric 121 and the bottom nonwoven fabric 122 are compositely connected at the slits 3 to form a flow channel.

[0018] The liquid-permeable surface layer 11 includes a hydrophilic nonwoven fabric 111 and a hydrophobic nonwoven fabric 112 distributed and fixed on both sides of the hydrophilic nonwoven fabric 111. The hydrophilic nonwoven fabric 111 is adhered to the upper surface of the absorbent core layer 12 and the two sides of the absorbent core layer 12, and is also adhered to the liquid-impermeable bottom layer 13. The outer side of the hydrophobic nonwoven fabric 112 is folded to form a first leak-proof edge 4 and a second leak-proof edge 5. The second leak-proof edge 5 is distributed on the outer side of the first leak-proof edge 4. The height of the second leak-proof edge 5 is greater than the height of the first leak-proof edge 4. A first elastic band 6 is embedded in the free end of the first leak-proof edge 4, and a second elastic band 7 is embedded in the free end of the second leak-proof edge 5.

[0019] This leak-proof diaper features a longitudinal slit 3 in the absorbent layer 123 to create a drainage channel, guiding liquid to quickly diffuse into the absorbent core layer 12 and preventing side leakage caused by local saturation. Simultaneously, the liquid-permeable surface layer 11 has double-layer leak-proof sidewalls on both sides: a first leak-proof sidewall 4 and a second leak-proof sidewall 5, forming a physical barrier. This double protection significantly reduces the risk of side leakage. During use, the absorbent core layer folds along the drainage channel, allowing the absorbent body 1 to fit better against the skin. This, in turn, ensures a good fit between the first and second leak-proof sidewalls 4 and 5, adapting to the dynamic activity needs of users of different body types. Furthermore, the second leak-proof sidewall 5 is higher than the first leak-proof sidewall 4, adapting to the leg contours of users of different body types. Combined with the elastic band's contraction force, it achieves a continuous fit against the legs during movement, solving the problem of gaps easily formed during dynamic activities in existing single-layer protective barriers. The hydrophobic non-woven fabric 112 folds to form leak-proof sidewalls, reducing direct contact between hard materials and the skin, lowering friction and irritation, and making it suitable for long-term wear.

[0020] Specifically, the absorbent layer 123 has 3 to 5 slits 3, preferably 3, with a lateral spacing of 1.5 to 3 cm, preferably 3 cm, and a slit width of 0.2 to 0.5 cm, preferably 0.4 cm. The top nonwoven fabric 121 and the bottom nonwoven fabric 122 are connected at the slits 3 by ultrasonic welding or hot melt adhesive dot bonding, preferably hot melt adhesive dot bonding, to ensure that the liquid is evenly distributed in the absorbent layer 123 and avoid local blockage. The slit width of 0.2 to 0.5 cm takes into account both the flow rate and structural strength, preventing the slit from breaking after absorption expansion. The hot melt adhesive dot bonding at the slits ensures a stable bond between the top nonwoven fabric 121 and the bottom nonwoven fabric 122, while reducing the impact of adhesive usage on liquid permeability. The liquid permeability rate of the flow channel is higher than that of the traditional structure.

[0021] Furthermore, the height of the first leak-proof baffle 4 is 2-3cm, preferably 2.5cm, and the height of the second leak-proof baffle 5 is 4-6cm, preferably 5cm. The first leak-proof baffle 4, with a height of 2-3cm, blocks a small amount of leaking liquid; the second leak-proof baffle 5, with a height of 4-6cm, forms a secondary interception, adapting to the leg movement range of users of different body types (such as infants and adults), improving the leak-proof redundancy. The double baffle structure, combined with elastic elastic bands, disperses pressure through the height difference during leg movement, avoiding sealing failure caused by excessive stretching of the single baffle.

[0022] Meanwhile, the absorbent material is a mixture of superabsorbent polymer (SAP) particles and wood pulp fibers. The mass ratio of SAP particles to wood pulp fibers is 6:4 to 8:2, preferably 7:3, which balances rapid liquid absorption and water retention capabilities. This increases the saturated water absorption capacity of the absorbent core layer, reducing backflow and side leakage. The fluffy structure of the wood pulp fibers increases the liquid diffusion area, and combined with the gelation and water retention of the SAP particles, it reduces the surface humidity of the surface layer, keeping the skin dry.

[0023] In this embodiment, the absorbent layer 123 is further provided with a plurality of transversely arranged embossed grooves 8. The depth of the embossed grooves 8 is 0.1 to 0.3 mm, preferably 0.2 mm. By physically squeezing, a rapid liquid diffusion path is formed, which increases the transverse diffusion speed, shortens the absorption time, reduces the risk of side leakage, and the regular arrangement of the embossed grooves 8 prevents the absorbent layer from deforming due to local liquid absorption and expansion, maintains the overall structural flatness, and extends the service life.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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 leak-proof diaper, characterized in that: The diaper includes a diaper body, which includes an absorbent core and a fabric layer laminated to its outer side. The absorbent core includes a liquid-permeable top layer, an absorbent core layer, and a liquid-impermeable bottom layer, which are stacked sequentially from top to bottom. The longitudinal direction is defined as extending along the length of the absorbent core, and the transverse direction is defined as extending along the width of the absorbent core. The absorbent core layer includes a top nonwoven fabric, a bottom nonwoven fabric, and an absorbent layer with absorbent material disposed between the top nonwoven fabric and the bottom nonwoven fabric. The absorbent layer has an upper edge and a lower edge distributed at both ends of the longitudinal direction, and a left edge and a right edge distributed at both ends of the transverse direction. The absorbent layer has at least two slits without absorbent material, each slit is distributed along the longitudinal direction, and the longitudinal ends of the slits are respectively connected to the upper edge and the lower edge. The top nonwoven fabric and the bottom nonwoven fabric are laminated and connected at the slits to form a flow channel. The liquid-permeable surface layer includes a hydrophilic nonwoven fabric and a hydrophobic nonwoven fabric distributed and fixed on both sides of the hydrophilic nonwoven fabric. The hydrophilic nonwoven fabric adheres to the upper surface of the absorbent core layer and the two sides of the absorbent core layer, and adheres to the impermeable bottom layer together with the absorbent core layer. The outer sides of the hydrophobic nonwoven fabric are folded to form a first leak-proof edge and a second leak-proof edge. The second leak-proof edge is distributed on the outer side of the first leak-proof edge. The height of the second leak-proof edge is greater than the height of the first leak-proof edge. A first elastic band is embedded in the free end of the first leak-proof edge, and a second elastic band is embedded in the free end of the second leak-proof edge.

2. The anti-leakage diaper according to claim 1, characterized in that: The absorbent layer has 3 to 5 slits, with a lateral spacing of 1.5 to 3 cm between each slit and a slit width of 0.2 to 0.5 cm. The top nonwoven fabric and the bottom nonwoven fabric are connected at the slits by ultrasonic welding or hot melt adhesive dot bonding.

3. The anti-leakage diaper according to claim 1 or 2, characterized in that: The height of the first leak-proof barrier is 2-3cm, and the height of the second leak-proof barrier is 4-6cm.

4. The anti-leakage diaper according to claim 3, characterized in that: The absorbent layer also contains several transversely arranged embossed grooves, with a groove depth of 0.1–0.3 mm.

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