An absorbent patch for preventing leakage of a diaper and a diaper comprising the same

Abstract

This utility model provides an absorbent patch for leak-proof diapers and a diaper composed of the same, relating to the field of diaper leak-proof technology. The absorbent patch, from bottom to top, includes an isolation layer, an adhesive layer, a lower core covering layer, an absorbent layer, an upper core covering layer, and a skin-friendly layer. The upper core covering layer has drainage holes and a flow divider. The flow divider is disposed within the drainage holes, and its bottom edge is fixedly connected to the inner wall of the drainage holes on the upper core covering layer. The lower end of the flow divider has multiple flow outlets spaced apart, which communicate with the absorbent layer. This application also discloses a diaper containing this absorbent patch. The absorbent patch for leak-proof diapers has drainage holes in the upper core covering layer that guide urine quickly into the absorbent layer. Combined with the concave arc-shaped flow divider and the flow outlets at its bottom, it can evenly disperse urine, prevent localized urine accumulation, accelerate the rapid absorption of urine by the absorbent core, and effectively prevent urine from seeping back into the upper core covering layer.

Description

Technical Field

[0001] This utility model relates to the field of diaper leak prevention technology, and in particular to an absorbent patch for diaper leak prevention and a diaper composed thereof. Background Technology

[0002] With the widespread use of diapers in infant care, elderly incontinence care, and other scenarios, users' requirements for their leak-proof performance, skin-friendliness, absorbency, and stability are gradually increasing. However, there are still many technical pain points to be solved in the current market for diapers and related absorbent products.

[0003] Most existing disposable diapers have a fixed absorbent core. For example, CN120732622A discloses an adjustable composite core diaper and its manufacturing process, which includes a bottom. The front of the bottom has an absorbent component for sufficient moisture absorption. On the front of the bottom, above and below the absorbent component, are tensioning components to improve user comfort and fit. On the opposite side of the two tensioning components are two connecting components to further adapt to users of different body types. Furthermore, the diaper lacks a targeted drainage structure design. Urine tends to accumulate in localized areas after contacting the absorbent layer, making it difficult to quickly and evenly distribute throughout the entire absorbent area. When the urine volume is large or the excretion rate is fast, the local absorbent layer can quickly reach saturation, and excess urine can leak along the diaper edges, causing damp clothing and bedding, increasing the frequency and difficulty of diaper care.

[0004] The aforementioned problems make it difficult for existing diapers to meet the diverse needs of users in terms of leak-proof reliability and ease of use. Therefore, developing a diaper leak-proof absorbent patch with efficient diversion and dispersion, skin-friendly penetration, flexible absorption and adaptation, and stable installation performance has become an urgent technical direction for the industry. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an absorbent pad for preventing leakage in diapers that is simple in structure, easy to use and can efficiently divert fluid, as well as diapers made therefrom.

[0006] The technical solution adopted by this utility model to solve its technical problem is: An absorbent pad for preventing leaks in diapers, comprising, from bottom to top, an isolation layer, an adhesive layer, a lower core covering layer, an absorbent layer, an upper core covering layer, and a skin-friendly layer; the upper core covering layer is provided with drainage holes and a flow divider; the flow divider is disposed within the drainage holes, and its bottom edge is fixedly connected to the inner wall of the drainage holes on the upper core covering layer; the lower end of the flow divider is provided with multiple flow outlets at intervals, and the flow outlets communicate with the absorbent layer.

[0007] The cross-section of the fluid divider consists of a convex arc at the top, symmetrically arranged concave arcs on both sides, and a straight line at the bottom. The convex arc at the top facilitates the rapid dispersion of urine entering the guide hole and allows it to flow into the diversion port along the concave arc sidewall. It then disperses into the absorption layer located below the upper core coating layer for rapid absorption. The shape, size, and distribution of the diversion port are optimized to achieve uniform dispersion and rapid diversion of urine, avoiding local urine accumulation that could lead to leakage. Furthermore, the structure of the fluid divider can effectively prevent urine that is not absorbed in time from seeping back into the upper core coating layer.

[0008] The flow guide holes on the upper core coating layer are evenly distributed.

[0009] The adhesive layer is a hot melt adhesive layer or a Velcro layer, which facilitates the quick and stable pasting and fixing of the absorbent patch to the area of ​​the diaper that needs enhanced absorbency or leak prevention, thereby achieving an integrated connection between the absorbent patch and the diaper.

[0010] The absorbent patch is detachably attached to the inner surface of the diaper body. Preferably, it is detachably attached to the end or side of the inner surface of the diaper body, thereby enhancing the diaper's absorption of urine and achieving the purpose of preventing leakage.

[0011] The absorbent pad is rectangular, or it is oval or elliptical in shape to fit the shape of the side of the diaper.

[0012] The release layer is a release paper compatible with hot melt adhesive or a fiber tape compatible with Velcro.

[0013] The absorbent layer is composed of superabsorbent polymer (SAP) and fluffy nonwoven fabric. The SAP is evenly distributed in the fluffy nonwoven fabric to form a multi-layered composite structure. The SAP has super absorbent and water-retaining capacity, capable of absorbing tens or even hundreds of times its own weight in water and locking it inside. The fluffy nonwoven fabric provides a certain degree of fluffiness and structural support, which helps the rapid absorption and diffusion of urine.

[0014] The skin-friendly layer is made of a soft, breathable non-woven fabric, which is either hot-air non-woven or spunbond non-woven. It is skin-friendly, reduces friction on the skin, and allows urine to quickly penetrate to the lower layer.

[0015] The upper and lower core covering layers are made of materials with good flexibility and a certain strength, which can wrap the absorbent layer and maintain the overall structural stability of the absorbent patch.

[0016] The ratio of superabsorbent polymer and fluffy nonwoven fabric in the absorbent layer can be adjusted according to different usage requirements to achieve different absorption performance.

[0017] The technical solution adopted by this utility model to further solve its technical problem is: A diaper with a detachable absorbent pad for leak prevention.

[0018] The absorbent pad is detachably attached to the end and / or side of the inner surface of the diaper.

[0019] The beneficial effects of this utility model of an absorbent patch for preventing leaks in diapers are as follows: This application is for an absorbent pad used to prevent leakage in diapers. The drainage holes in the upper core covering layer can guide urine to quickly enter the absorbent layer. Combined with the concave arc-shaped diverter on the outside and the diverter port at the bottom, it can evenly disperse urine, prevent local urine accumulation, accelerate the rapid absorption of urine by the absorbent body, and effectively prevent urine from seeping back into the upper core covering layer.

[0020] The absorbent layer is composed of a multi-layered composite structure of superabsorbent polymer and fluffy nonwoven fabric. The superabsorbent polymer can strongly absorb water and lock the moisture inside, while the fluffy nonwoven fabric can provide fluffiness and structural support, helping urine to be absorbed and diffused quickly, thus achieving efficient urine storage.

[0021] The adhesive layer is connected to the diaper body by hot melt adhesive or Velcro, ensuring a firm bond and preventing shifting during use. The release layer is easy to tear off quickly before use. The upper and lower core covering layers have good flexibility and a certain strength, which can wrap the absorbent layer and maintain the overall structural stability of the absorbent patch.

[0022] The skin-friendly layer is made of soft and breathable non-woven fabric, which has good skin-friendliness, reduces friction on the skin, and helps urine to quickly penetrate into the underlying structure, preventing urine from lingering on the surface.

[0023] The beneficial effects of this utility model of a diaper are as follows: This diaper features detachable absorbent pads that effectively enhance urine absorption at the ends or sides, preventing leakage. Absorbent pads can be used for large amounts of urine, while they are not needed for moderate or small amounts, thus meeting the needs of different groups. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the layered structure of an absorbent sticker for leak prevention in diapers according to Embodiment 1 of this utility model. Figure 2 for Figure 1 A schematic diagram of the upper core coating layer structure; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 A schematic diagram of the three-dimensional structure of the fluid separator.

[0025] Figure 5 This is a schematic diagram of the structure of a diaper according to Embodiment 2 of this utility model.

[0026] In the picture: 1. The diaper itself; 2. Absorbent pads; 21. Skin-friendly layer; 221. Drainage hole; 222. Flow divider; 223. Flow divider port; 22. Upper core coating layer; 23. Absorbent layer; 24. Lower core coating layer; 25. Adhesive layer; 26. Isolation layer. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1 This embodiment provides an absorbent patch 2 for preventing leaks in diapers. The absorbent patch 2 comprises, from bottom to top, an isolation layer 26, an adhesive layer 25, a lower core covering layer 24, an absorbent layer 23, an upper core covering layer 22, and a skin-friendly layer 21. The upper core covering layer 22 is provided with a guide hole 221 and a flow divider 222. The flow divider 222 is disposed within the guide hole 221, and its bottom edge is fixedly connected to the inner sidewall of the guide hole 221 on the upper core covering layer 22. The lower end of the flow divider 222 is provided with a plurality of flow diversion ports 223, which communicate with the absorbent layer 23.

[0029] The cross-section of the flow divider 222 consists of a convex arc at the top, symmetrically arranged concave arcs on both sides, and a straight line at the bottom. The convex arc at the top facilitates the rapid dispersion of urine entering the guide hole 221 and flows into the diversion port 223 along the concave arc sidewall. It then disperses into the absorption layer 23 located below the upper core coating layer 22 for rapid absorption. The shape, size, and distribution of the diversion port 223 are optimized to achieve uniform dispersion and rapid diversion of urine, avoiding local urine accumulation that could lead to leakage. Furthermore, the structure of the flow divider 222 can effectively prevent urine that is not absorbed in time from seeping back into the upper core coating layer 22.

[0030] The flow guide holes 221 on the upper core covering layer 22 are evenly distributed.

[0031] The adhesive layer 25 is a hot melt adhesive layer or a Velcro layer, which facilitates the quick and stable pasting and fixing of the absorbent patch 2 to the area of ​​the diaper that needs enhanced absorbency or leak prevention, thereby achieving an integrated connection between the absorbent patch 2 and the diaper.

[0032] The absorbent patch 2 is detachably connected to the inner surface of the diaper body 1. Preferably, it is detachably connected to the end or side of the inner surface of the diaper body 1, thereby enhancing the diaper's absorption of urine and achieving the purpose of preventing leakage.

[0033] The absorbent patch 2 is rectangular, elongated, or racetrack-shaped, or it can be an arc, oval, or other shape that fits the shape of the side of the diaper. The size of the absorbent patch 2 can be adjusted according to the needs of users of different ages and body types. The absorbent patch 2 is not limited to one location on the diaper; it can be attached to one or more locations on the diaper as needed.

[0034] The release layer 26 is either release paper compatible with hot melt adhesive or fiber tape compatible with Velcro, offering two bonding methods to suit different usage scenarios or preferences, making it more flexible and convenient to use.

[0035] The absorbent layer 23 is composed of superabsorbent polymer (SAP) and fluffy nonwoven fabric. The SAP is evenly distributed within the fluffy nonwoven fabric, forming a multi-layered composite structure. The SAP possesses superior water absorption and retention capabilities, capable of absorbing tens or even hundreds of times its own weight in water and locking it inside. The fluffy nonwoven fabric provides a certain degree of bulkiness and structural support, facilitating the rapid absorption and diffusion of urine. The ratio of SAP to fluffy nonwoven fabric in the absorbent layer 23 can be adjusted according to different usage requirements to achieve varying absorption performance.

[0036] The skin-friendly layer 21 is made of a soft, breathable non-woven fabric material, which is either hot-air non-woven fabric or spunbond non-woven fabric. It is skin-friendly, reduces friction on the skin, and allows urine to quickly penetrate to the lower layer.

[0037] The upper core covering layer 22 and the lower core covering layer 24 are made of materials with good flexibility and a certain strength, which can wrap the absorbent layer 23 and maintain the overall structural stability of the absorbent patch 2. The lower core covering layer 24 is bonded to the diaper body 1 by an adhesive layer 25 formed by hot melt adhesive. The hot melt adhesive is applied evenly to ensure that the absorbent patch 2 is firmly bonded to the diaper body 1 and will not shift during use; the release layer 26 covers the hot melt adhesive surface and can be easily peeled off before use.

[0038] It should be noted that the adhesive layer 25 can also be made of Velcro, and the corresponding isolation layer 26 is made of fiber tape. The Velcro is used to bond the absorbent pad 2 to the diaper body 1, ensuring that the absorbent pad 2 is firmly attached to the diaper body 1 and will not shift during use. The fiber tape isolation layer 26 covers the surface of the Velcro and can be easily removed before use, and then the absorbent pad is attached to the diaper.

[0039] Working principle and usage of this utility model: When using the absorbent pad 2 for leak prevention in diapers, first peel off the bottom release layer 26 of the absorbent pad 2 to expose the adhesive layer 25 of hot melt adhesive or Velcro. Securely attach the absorbent pad 2 to the diaper body 1 using hot melt adhesive or Velcro to ensure it does not shift during use. When urine comes into contact with the top skin-friendly layer 21 of the absorbent pad 2, the skin-friendly layer 21 reduces skin friction and allows urine to quickly penetrate to the lower upper core cover layer 22. The evenly distributed drainage holes 221 on the upper core cover layer 22 guide the urine in, and then... A fluid distribution layer 222 with a fixed inner wall and an inwardly concave arc shape distributes urine evenly to the absorbent layer 23 through a distribution port 223 at its bottom. The absorbent layer 23 is composed of a multi-layer composite structure of superabsorbent polymer and fluffy nonwoven fabric. The superabsorbent polymer can absorb tens or even hundreds of times its own weight in water and lock it inside, while the fluffy nonwoven fabric provides fluffiness and structural support, helping the urine to be absorbed and diffused quickly. Finally, the lower core covering layer 24 further blocks urine penetration and prevents leakage, achieving efficient leak prevention and absorption functions throughout the process.

[0040] The preparation process of the absorbent patch 2 for leak prevention in diapers according to this utility model includes the following steps: I. Raw Material Preparation Material selection for each layer: Prepare raw materials for each structural layer according to design requirements. The skin-friendly layer 21 is made of hot-air nonwoven fabric or spunbond nonwoven fabric; the upper core covering layer 22 and the lower core covering layer 24 are made of hygienic nonwoven fabric with strong flexibility and certain tensile strength; the absorbent layer 23 is made of superabsorbent polymer and fluffy nonwoven fabric; the hot melt adhesive is made of hygienic hot melt pressure-sensitive adhesive; and the release paper of the isolation layer 26 is made of silicone paper.

[0041] II. Core Structure Preparation Absorber layer 23 composite Layered fabric laying: On the conveyor belt of the fully automatic absorbent core forming machine, a layer of fluffy non-woven fabric is first laid, and then the mixed superabsorbent polymer resin is covered on it, finally forming a fluffy non-woven fabric to fix the SAP.

[0042] Shaping and reinforcement: The composite absorbent layer 23 is shaped by hot air penetration dryer for 10-15 seconds, so that the fluffy non-woven fabric fibers are intertwined and the position of the superabsorbent polymer is fixed to prevent SAP from shifting during subsequent use.

[0043] III. Overall Assembly Connection between the lower core covering layer 24 and the release paper: On a fully automatic glue applicator, hot melt adhesive is evenly applied to the lower surface of the lower core covering layer 24. Then, the release paper is placed on the surface of the hot melt adhesive and pressed together by a pressing roller to ensure that the release paper and the hot melt adhesive are completely bonded together without bubbles or glue leakage.

[0044] The absorbent layer 23 is placed on the upper surface of the lower core covering layer 24. The position is adjusted so that the absorbent layer 23 is centered. Then, the upper core covering layer 22 of the skin-friendly layer 21 is placed on top of the absorbent layer 23, so that the edges of the upper and lower core covering layers 24 are aligned, forming a sandwich structure of "lower core covering layer 24 - absorbent layer 23 - upper core covering layer 22".

[0045] Edge sealing: The edges of the upper and lower core covering layers 24 are sealed by an ultrasonic edge sealing machine to prevent leakage of the superabsorbent polymer resin or fluffy non-woven fabric in the absorbent layer 23, while ensuring that the seal is flexible and does not affect the fit during use.

[0046] IV. Molding and Quality Inspection Cutting and shaping: According to the design dimensions, the overall structure is cut by a CNC cutting machine with a cutting accuracy controlled within ±0.5mm to ensure that the absorbent patch 2 has a regular shape and no burrs on the edges.

[0047] Quality Inspection: Structural inspection: Randomly select samples to check the adhesion of each layer, the fixation of the flow divider 222, and the integrity of the guide hole 221; Performance testing: Test the penetration rate of the skin-friendly layer 21, the water absorption ratio of the absorbent layer 23 (meets design requirements), and the hot melt adhesive bonding strength; Hygiene testing: In accordance with GB / T28004 standard, the total bacterial count and total fungal count of the product are tested to ensure that hygiene standards are met.

[0048] Example 2

[0049] This embodiment provides a diaper, on which the absorbent patch 2 for preventing leakage of the diaper described in Embodiment 1 is detachably connected.

[0050] The absorbent patch 2 is detachably attached to the end of the inner surface of the diaper body 1, such as... Figure 5 As stated above.

[0051] It should be noted that the absorbent patch 2 is detachably connected to the side of the inner surface of the diaper body 1, or is detachably connected to both the end and the side of the inner surface of the diaper body 1. The changes in the above technical features can be understood and implemented by those skilled in the art through textual description, so no further drawings will be provided for illustration.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is used only to illustrate the technical solution of this utility model, and is not intended to limit the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. An absorbent pad for preventing leaks in diapers, characterized in that, The absorbent patch (2) comprises, from bottom to top, an isolation layer (26), an adhesive layer (25), a lower core covering layer (24), an absorbent layer (23), an upper core covering layer (22), and a skin-friendly layer (21); the upper core covering layer (22) is provided with a guide hole (221) and a flow divider (222); the flow divider (222) is disposed in the guide hole (221), and its bottom edge is fixedly connected to the inner wall of the guide hole (221) on the upper core covering layer (22); the lower end of the flow divider (222) is provided with multiple flow dividers (223) at intervals, and the flow dividers (223) are connected to the absorbent layer (23).

2. The absorbent pad for leak prevention in diapers as described in claim 1, characterized in that, The cross-section of the fluid divider (222) consists of a convex arc at the top, concave arcs symmetrically arranged on both sides, and a straight line at the bottom.

3. The absorbent pad for leak prevention in diapers as described in claim 1, characterized in that, The flow guide holes (221) on the upper core covering layer (22) are evenly distributed.

4. The absorbent pad for leak prevention in diapers as described in claim 1, characterized in that, The adhesive layer (25) is a hot melt adhesive layer or a hook and loop fastener layer.

5. The absorbent pad for leak prevention in diapers as described in claim 1, characterized in that, The absorbent patch (2) is detachably attached to the inner surface of the diaper body (1).

6. The absorbent pad for leak prevention in diapers as described in claim 5, characterized in that, The absorbent patch (2) is rectangular, or oval or elliptical in shape to match the shape of the side of the diaper.

7. The absorbent pad for leak prevention in diapers as described in claim 1, characterized in that, The release layer (26) is a release paper adapted to hot melt adhesive or a fiber tape adapted to hook and loop fasteners.

8. The absorbent pad for leak prevention in diapers as described in claim 1, characterized in that, The absorbent layer (23) is composed of superabsorbent polymer and fluffy nonwoven fabric. The superabsorbent polymer is evenly distributed in the fluffy nonwoven fabric to form a multi-layer composite structure. The skin-friendly layer (21) is made of hot-air nonwoven fabric or spunbond nonwoven fabric.

9. A diaper, characterized in that, The diaper is detachably connected to an absorbent patch (2) for leak prevention as described in any one of claims 1 to 8.

10. The diaper as described in claim 9, characterized in that, The absorbent patch (2) is detachably attached to the end and / or side of the inner surface of the diaper body (1).

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