A side leakage prevention core
Patent Information
- Application Number
- CN202520830413.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-04-28
AI Technical Summary
然而，在纸尿裤的使用过程中，尤其是在夜间或长时间使用的情况下，防侧漏问题一直是行业发展的瓶颈之一
[0025]This utility model is a leak-proof core with a left and right leak-proof guard and an internal leak-proof structure, which effectively solves the problem of urine leakage in the side area and improves the leak-proof performance of diapers.
Smart Images
Figure CN224711243U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of diaper technology, specifically to a leak-proof core. Background Technology
[0002] With societal progress and improved living standards, disposable diapers have become an indispensable part of daily care for infants, the elderly, and other special groups. However, during diaper use, especially at night or during prolonged use, leakage prevention has remained a bottleneck in the industry's development. While existing diapers effectively absorb urine, leakage still occurs in certain situations, particularly after the baby rolls over, moves around, or wears the diaper for extended periods, significantly impacting user comfort and hygiene.
[0003] Traditional disposable diapers primarily rely on the absorbency of their inner absorbent material and leak-proof side features (such as elastic waistbands and leak guards). While these designs can prevent urine leakage to some extent, they still have shortcomings in the following aspects:
[0004] While the absorbent layer of existing diapers can absorb a certain amount of urine, it can easily become saturated with large amounts of urine or during continuous use, leading to leakage, especially in the side areas, causing side leakage problems.
[0005] The side leak-proof design of disposable diapers mainly relies on elastic materials to improve tightness, but elastic materials often have limitations, especially when babies are active and rolling over, the side leakage problem is more obvious.
[0006] Most existing diaper designs are intended for use in static states, such as lying down while sleeping. However, when infants, the elderly, or other special groups are active, side leakage is often unavoidable.
[0007] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a leak-proof core. Utility Model Content
[0008] The purpose of this invention is to provide a leak-proof core to solve the problems mentioned in the background art.
[0009] To achieve the above objectives, this utility model provides the following technical solution:
[0010] A side-leakage prevention core technology solution includes:
[0011] The left and right leak-proof guards are respectively installed on both sides of the core;
[0012] The surface layer of hot-air nonwoven fabric covers the top of the core;
[0013] The left and right anti-leakage structures are located inside the left and right anti-leakage enclosures, respectively.
[0014] The anti-leakage part structure includes, in sequence, a left-side guide surface non-woven fabric, a left-side polymer absorbent, and a left-side fluffy hot air non-woven fabric.
[0015] The anti-leakage structure includes, in sequence, a right-side guide surface non-woven fabric, a right-side polymer absorbent, and a right-side fluffy hot air non-woven fabric;
[0016] The core has an absorbent core structure in the middle, which includes a polymer absorbent covered with hydrophilic nonwoven fabric, and upper and lower sides are respectively provided with upper and lower flow-guiding dust-free paper.
[0017] The core has a breathable bottom membrane, which is fixedly connected to the bottom layer of dust-free paper by a non-woven fabric.
[0018] As a preferred technical solution, the left and right flow guiding nonwoven fabrics are made of hydrophilic materials and have flow guiding grooves on their surfaces to quickly guide the liquid to the left and right polymer absorbers.
[0019] As a preferred technical solution, the left fluffy hot air nonwoven fabric and the right fluffy hot air nonwoven fabric have a three-dimensional structure with an internal void layer to enhance the buffering performance and liquid diffusion efficiency of the core.
[0020] As a preferred technical solution, the left and right leak-proof barriers are made of elastic materials, and their inner edges are seamlessly connected to the left and right non-woven flow guiding surface layers to form a closed leak-proof barrier.
[0021] As a preferred technical solution, a fluffy nonwoven fabric is provided between the upper air-guiding dust-free paper and the surface hot air nonwoven fabric to improve the air permeability of the core and the ability of liquid to be evenly distributed.
[0022] As a preferred technical solution, the left and right polymer absorbers are distributed in a gradient, with the absorber density near the core edge being higher than that in the middle of the core structure, so as to preferentially intercept the laterally flowing liquid.
[0023] As a preferred technical solution, the top of the left and right leak-proof guards extends to the edge of the surface hot air nonwoven fabric and is bonded and fixed to the surface hot air nonwoven fabric by hot melt adhesive.
[0024] Compared with the prior art, the beneficial effects of this utility model are:
[0025] This utility model is a leak-proof core with a left and right leak-proof guard and an internal leak-proof structure, which effectively solves the problem of urine leakage in the side area and improves the leak-proof performance of diapers.
[0026] By using nonwoven fabric for the left and right guide surfaces made of hydrophilic materials and setting guide channels, urine can be quickly guided to the polymer absorbent, thus improving absorption efficiency.
[0027] The three-dimensional structure of the left and right fluffy hot air nonwoven fabrics not only enhances the cushioning performance of the core but also improves the liquid diffusion efficiency, allowing urine to be distributed more evenly within the core.
[0028] The elastic material design of the left and right leak-proof barriers, along with their seamless connection with the left and right non-woven fabric guide layers, forms a closed leak-proof barrier that effectively prevents side leakage of urine.
[0029] In addition, the fluffy non-woven fabric between the upper layer of air-wicking dust-free paper and the surface layer of hot-air non-woven fabric improves the breathability of the core and the ability to distribute liquid evenly, so that the diaper can remain dry and comfortable even after long-term use.
[0030] The gradient distribution design of the left and right polymer absorbers can preferentially intercept laterally flowing liquids, further improving the side leakage prevention effect.
[0031] The anti-leakage core of this utility model has a reasonable design, simple structure, and significant anti-leakage effect, which can effectively improve the user's comfort. Attached Figure Description
[0032] Figure 1 A schematic diagram of the unfolded structure of a leak-proof core;
[0033] Figure 2 A schematic diagram of the overall structure of a leak-proof core;
[0034] Figure 3 This is a schematic diagram of a folded structure for a leak-proof core.
[0035] In the attached diagram, the following labels are used: 101, left leak-proof enclosure; 102, right leak-proof enclosure; 2, top layer hot air nonwoven fabric; 31, left guide surface nonwoven fabric; 32, right guide surface nonwoven fabric; 41, left polymer absorbent; 42, right polymer absorbent; 51, left fluffy hot air nonwoven fabric; 52, right fluffy hot air nonwoven fabric; 6, hydrophilic nonwoven fabric; 7, upper guide dust-free paper; 8, fluffy nonwoven fabric; 9, polymer absorbent; 10, breathable bottom membrane; 11, bottom guide dust-free paper; 12, laminated nonwoven fabric. Detailed Implementation
[0036] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.
[0037] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a leak-proof core technology solution: it includes a left leak-proof guard 101 and a right leak-proof guard 102, respectively disposed on both sides of the core. A surface layer of hot-air nonwoven fabric 2 covers the top of the core. The left and right leak-proof structures are located inside the left and right leak-proof guards 101 and 102, respectively. The left leak-proof structure includes a left guiding surface layer nonwoven fabric 31, a left polymer absorbent 41, and a left fluffy hot-air nonwoven fabric 51, stacked sequentially. The right leak-proof structure includes a right guiding surface layer nonwoven fabric 32, a right polymer absorbent 42, and a right fluffy hot-air nonwoven fabric 52, stacked sequentially.
[0038] like Figure 2 As shown, the core body has an absorbent core structure in the middle, which includes a polymer absorbent 9 covered by hydrophilic nonwoven fabric 6, with an upper layer of flow-guiding cleanroom paper 7 and a lower layer of flow-guiding cleanroom paper 11 on its upper and lower sides, respectively. The bottom of the core body has a breathable bottom membrane 10, which is fixedly connected to the lower layer of flow-guiding cleanroom paper 11 by a laminated nonwoven fabric 12.
[0039] The left and right flow guiding nonwoven fabric layers 31 and 32 are made of hydrophilic materials and have flow guiding grooves on their surfaces to quickly guide the liquid to the left and right polymer absorbers 41 and 42.
[0040] The left fluffy hot air nonwoven fabric 51 and the right fluffy hot air nonwoven fabric 52 are three-dimensional structures with internal void layers to enhance the cushioning performance and liquid diffusion efficiency of the core.
[0041] The left leak-proof barrier 101 and the right leak-proof barrier 102 are made of elastic material, and their inner edges are seamlessly connected to the left guide surface non-woven fabric 31 and the right guide surface non-woven fabric 32 to form a closed leak-proof barrier.
[0042] A fluffy nonwoven fabric 8 is provided between the upper layer of air-guiding dust-free paper 7 and the surface layer of hot air nonwoven fabric 2 to improve the air permeability of the core and the ability of liquid to be evenly distributed.
[0043] The left polymer absorber 41 and the right polymer absorber 42 are distributed in a gradient. The absorber density near the edge of the core is higher than the density of the central absorber core structure, so as to preferentially intercept the liquid flowing laterally.
[0044] The tops of the left leak-proof guard 101 and the right leak-proof guard 102 extend to the edge of the surface hot air nonwoven fabric 2 and are bonded and fixed to the surface hot air nonwoven fabric 2 with hot melt adhesive.
[0045] By implementing the above technical solution, the anti-leakage core of this utility model can effectively solve the side leakage problem that occurs in existing diapers during use, improve the anti-leakage performance of diapers, and ensure the comfort and hygiene of users.
[0046] The working principle and usage process of this utility model are as follows: Liquids such as urine first come into contact with the surface layer of hot-air nonwoven fabric 2. This material has good skin-friendliness and breathability, allowing the liquid to penetrate quickly. Subsequently, the liquid is guided by the upper layer of flow-guiding dust-free paper 7 and fluffy nonwoven fabric 8, and is evenly distributed onto the absorbent core structure. Due to its excellent water absorption performance, the polymer absorbent 9 can quickly absorb and lock in the liquid, effectively preventing backflow. At the same time, the flow-guiding groove design on the left and right flow-guiding surface nonwoven fabrics 31 and 32 allows the liquid to be quickly guided along a specific path to the polymer absorbents 41 and 42 on the left and right sides, further enhancing the anti-leakage effect.
[0047] During use, even with increased user activity, the elastic material design of the left leak-proof guard 101 and right leak-proof guard 102 allows them to closely conform to the user's body curves, preventing liquid leakage from the sides. Furthermore, the three-dimensional structure of the left fluffy hot-air nonwoven fabric 51 and right fluffy hot-air nonwoven fabric 52 not only enhances the core's cushioning performance but also improves liquid diffusion efficiency, allowing the core to make fuller use of the absorbent material and extend its service life.
[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
[0049] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0051] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.
Claims
1. A leak-proof core, characterized in that, include: The left leak-proof enclosure (101) and the right leak-proof enclosure (102) are respectively installed on both sides of the core; Hot air nonwoven fabric (2) is used to cover the top of the core. The left and right sides of the anti-leakage structure are located inside the left anti-leakage enclosure (101) and the right anti-leakage enclosure (102), respectively. The anti-leakage part structure includes, in sequence, a left-side guide surface nonwoven fabric (31), a left-side polymer absorbent (41), and a left-side fluffy hot air nonwoven fabric (51). The anti-leakage part structure includes, in sequence, a right-side guide surface non-woven fabric (32), a right-side polymer absorbent (42), and a right-side fluffy hot air non-woven fabric (52). The core has an absorbent core structure in the middle, which includes a polymer absorbent (9) covered by hydrophilic nonwoven fabric (6), and an upper layer of flow-guiding dust-free paper (7) and a lower layer of flow-guiding dust-free paper (11) on its upper and lower sides respectively. The core has a breathable bottom membrane (10) at the bottom, and is fixedly connected to the bottom flow-guiding dust-free paper (11) by a non-woven fabric (12).
2. The anti-leakage core according to claim 1, characterized in that: The left and right flow guiding nonwoven fabrics (31 and 32) are hydrophilic materials with flow guiding grooves on their surfaces to quickly guide liquid to the left and right polymer absorbers (41 and 42).
3. The anti-leakage core according to claim 1, characterized in that: The left fluffy hot air nonwoven fabric (51) and the right fluffy hot air nonwoven fabric (52) are three-dimensional structures with a void layer inside to enhance the buffering performance and liquid diffusion efficiency of the core.
4. The anti-leakage core according to claim 1, characterized in that: The left leak-proof enclosure (101) and the right leak-proof enclosure (102) are made of elastic material, and their inner edges are seamlessly connected to the left flow guiding surface non-woven fabric (31) and the right flow guiding surface non-woven fabric (32) to form a closed leak-proof barrier.
5. The anti-leakage core according to claim 1, characterized in that: A fluffy nonwoven fabric (8) is provided between the upper layer of air-guiding dust-free paper (7) and the surface layer of hot air nonwoven fabric (2) to improve the air permeability of the core and the ability of liquid to be evenly distributed.
6. The anti-leakage core according to claim 1, characterized in that: The left polymer absorber (41) and the right polymer absorber (42) are distributed in a gradient, with the absorber density near the core edge being higher than that in the middle of the core structure, so as to preferentially intercept the liquid flowing laterally.
7. The anti-leakage core according to claim 1, characterized in that: The tops of the left leak-proof enclosure (101) and the right leak-proof enclosure (102) extend to the edge of the surface hot air nonwoven fabric (2) and are bonded to the surface hot air nonwoven fabric (2) with hot melt adhesive.