High-efficiency flow guide core spunlaced nonwoven fabric and paper diaper containing same

Abstract

The utility model discloses a kind of high-efficiency flow guide core body spunlace nonwoven fabric and paper diaper containing it, including skin antibacterial layer, the skin antibacterial layer outside is provided with three-dimensional flow guide layer, the outside of three-dimensional flow guide layer is provided with high absorption water storage layer, the outside of high absorption water storage layer is provided with base bottom layer, and base bottom layer is PP spun-bonded nonwoven fabric.Core body is the multilayer composite structure integrally formed by spunlace process, including in order from the side of skin antibacterial layer, three-dimensional flow guide layer, high absorption water storage layer and base bottom layer to the side far away along the thickness direction to user skin, three-dimensional flow guide layer provides excellent liquid transverse diffusion path with three-dimensional hollow fiber structure, can quickly, uniformly transport liquid to each area of high absorption water storage layer, greatly improve the utilization and use efficiency of core body, avoid liquid concentration in lower liquid point and produce back seepage.

Description

Technical Field

[0001] This utility model relates to the field of sanitary materials technology, specifically to a high-efficiency flow-guiding core spunlace nonwoven fabric and diapers containing the same. Background Technology

[0002] The core function of disposable diapers is to quickly absorb and lock in liquid, keeping the user's skin dry. Their core absorbent structure—the core—is typically composed of multiple layers of nonwoven fabric or fluffy cotton with different functions. Traditional core structures often employ simple layered designs, bonded together using hot melt adhesives or needle punching. This results in low diaper flow efficiency, insufficient lateral diffusion of liquid between layers, and a tendency for liquid to concentrate at the drip point, leading to localized saturation while other areas remain unused, causing backflow. Furthermore, hot melt adhesive bonding can cause structural rigidity, affecting breathability and softness; while needle punching causes significant fiber damage and insufficient bond strength. During use, under pressure and friction, layers are prone to shifting or delamination, affecting overall performance. Therefore, we propose a high-efficiency flow-wicking core spunlace nonwoven fabric and diapers containing it. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-efficiency flow-guiding core spunlace nonwoven fabric and diapers containing it. The spunlace composite process realizes fiber-level bonding, strong interfacial bonding between layers, soft structure and good integrity. During use, there will be no delamination or displacement, which can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency flow-guiding core spunlace nonwoven fabric, comprising a skin-friendly antibacterial layer, a three-dimensional flow-guiding layer disposed on the outer side of the skin-friendly antibacterial layer, a highly absorbent water-retaining layer disposed on the outer side of the three-dimensional flow-guiding layer, a highly absorbent resin disposed within the highly absorbent water-retaining layer, and a base layer disposed on the outer side of the highly absorbent water-retaining layer, the base layer being a PP spunbond nonwoven fabric. The PP spunbond nonwoven fabric, for example, can be treated with an organic fluorine water-repellent finishing agent. The highly absorbent water-retaining layer can be a highly absorbent resin, or a mixture of a highly absorbent resin and fluff pulp.

[0005] As a preferred technical solution of this utility model, the skin-friendly antibacterial layer is a spunlace fabric made of chitin fiber and ES fiber.

[0006] In a preferred embodiment of this invention, the three-dimensional flow-guiding layer is composed of three-dimensional crimped hollow polyester fibers and low-melting-point hot-melt polyester fibers. These two types of fibers can be produced through a blending and carding process.

[0007] This utility model also provides the following technical solution: a diaper, comprising a diaper body including a high-efficiency flow-guiding core spunlace nonwoven fabric and a waist support fixedly connected to the body, the waist support including a front waist and a back waist.

[0008] As a preferred technical solution of this utility model, the back waist is split into two sections at one end, one of which has a hook and loop fastener on its outer surface and the other has a hook and loop fastener on its inner surface corresponding to the hook and loop fastener.

[0009] As a preferred embodiment of this utility model, the waist support has vertical tear lines on both sides of the middle section.

[0010] As a preferred technical solution of this utility model, a water-sensitive color-changing indicator strip is provided between the high-absorption water storage layer and the foundation bottom layer.

[0011] As a preferred technical solution of this utility model, the water-sensitive color-changing indicator strip is provided in three strips, which are evenly distributed in the middle and on both sides of the main body.

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: The core is a multi-layered composite structure integrally formed through a hydroentangling process. Along the thickness direction from the side facing the user's skin to the side furthest away, it sequentially includes: a skin-friendly antibacterial layer, a three-dimensional flow-guiding layer, a highly absorbent water-retaining layer, and a base layer. The three-dimensional hollow fiber structure of the flow-guiding layer provides an excellent lateral diffusion path for the liquid, enabling rapid and uniform delivery of the liquid to various areas of the highly absorbent water-retaining layer, greatly improving the utilization rate and efficiency of the core and preventing backflow caused by liquid concentration at the dispensing point. Simultaneously, the hydroentangling composite process achieves fiber-level bonding, resulting in strong interfacial bonding between layers, a flexible structure, and good overall integrity, preventing delamination or displacement during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the high-efficiency flow-guiding core hydroentangled nonwoven fabric of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the diaper of this utility model;

[0015] Figure 3 This is a top view of the diaper of this utility model;

[0016] Figure 4 This is a side view of the diaper of this utility model.

[0017] In the picture: 1. Skin-friendly antibacterial layer, 2. 3D diversion layer, 3. High absorbency water storage layer, 4. Basic bottom layer, 5. Diaper, 6. Main body, 7. Waist support, 8. Front waist, 9. Back waist, 10. Velcro ribbed side, 11. Velcro textured side, 12. Easy tear line, 13. Water-sensitive color indicator strip. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1 This utility model provides a technical solution: a high-efficiency flow-guiding core spunlace nonwoven fabric, comprising a skin-friendly antibacterial layer 1, a three-dimensional flow-guiding layer 2 disposed on the outer side of the skin-friendly antibacterial layer 1, and a highly absorbent water-retaining layer 3 disposed on the outer side of the three-dimensional flow-guiding layer 2. The highly absorbent water-retaining layer 3 is a mixture of SAP (superabsorbent polymer) and fluff pulp. The SAP is uniformly fixed in the fluff pulp fiber network by airflow web forming technology, with a unit weight of 150-250 gsm. This layer is the main liquid storage unit.

[0020] The high-absorption water storage layer 3 is provided with a base layer 4 on its outer side. The base layer 4 is made of PP spunbond nonwoven fabric with a unit weight of 15-20 gsm. It mainly serves to wrap and support the load and is treated with an organic fluorine water-repellent finishing agent.

[0021] The core is a multi-layered composite structure integrally formed using a hydroentangling process. Along its thickness direction from the side facing the user's skin to the side furthest away, it comprises: a skin-friendly antibacterial layer 1, a three-dimensional flow-guiding layer 2, a highly absorbent water-retaining layer 3, and a base layer 4. The three-dimensional hollow fiber structure of the flow-guiding layer 2 provides an excellent lateral diffusion path for the liquid, enabling rapid and uniform delivery of the liquid to all areas of the highly absorbent water-retaining layer. This significantly improves the utilization rate and efficiency of the core, preventing liquid concentration at the dispensing point and backflow. Simultaneously, the hydroentangling composite process achieves fiber-level bonding, resulting in strong interfacial adhesion between layers, a flexible structure, and good overall integrity, preventing delamination or displacement during use.

[0022] In a preferred embodiment, the skin-friendly antibacterial layer 1 is a spunlace fabric blended with chitosan fiber and ES fiber, with a unit weight of 20-30 gsm. Chitosan fiber has natural antibacterial and bacteriostatic effects, good biocompatibility, and is especially suitable for delicate baby skin.

[0023] In a preferred embodiment, the three-dimensional flow-guiding layer 2 is a hybrid network of three-dimensional crimped hollow polyester fibers and low-melting-point hot-melt polyester fibers, with the hot-melt fiber accounting for 15%-25% and a unit weight of 40-60 gsm. This fiber layer forms permanent three-dimensional channels that can instantly diffuse the liquid to the surrounding areas, preventing concentrated seepage.

[0024] Please see Figure 2-4 This utility model also provides a technical solution: a diaper 5, comprising a main body 6 containing a high-efficiency diverting core spunlace nonwoven fabric and a waist support 7 fixedly connected to the main body 6, the waist support 7 comprising a front waistband 8 and a back waistband 9. The back waistband 9 is split into two sections at one end, one section having a hook and loop fastener 10 on its outer surface, and the other section having a hook and loop fastener 11 corresponding to the hook and loop fastener 10 on its inner surface. The hook and loop fastener 10 and the hook and loop fastener 11 can be used to fasten and fix the front waistband 8 and the back waistband 9 together, thereby securing the diaper 5 to the baby. The hook and loop fastener 10 and the hook and loop fastener 11 are located at the back waistband, which can prevent the baby from unintentionally or intentionally tearing the diaper 5 from the front, thus improving the stability of wearing. The hook and loop fastener 10 is positioned facing outwards and the hook and loop fastener 11 is positioned facing inwards, which can prevent the hook and loop fasteners from contacting the baby's skin and causing discomfort when they are misaligned.

[0025] In a further preferred technical solution, vertical easy-tear lines 12 are provided on both sides of the middle part of the waist support 7. When it is necessary to take off the diaper, simply apply force in a direction parallel to the waist, and the adhesive part will be neatly separated from the easy-tear line first, achieving quick tearing. This avoids the trouble of pulling hard or searching for the edge of the waist patch, which is a traditional waist patch, and greatly improves the convenience of taking off the diaper.

[0026] In a preferred embodiment, a water-sensitive color-changing indicator strip 13 is provided between the high-absorbency water storage layer 3 and the base layer 4. The water-sensitive color-changing indicator strip 13 uses environmentally friendly water-based water-sensitive color-changing ink. It is located at the bottom of the high-absorbency water storage layer 3. When there is a lot of liquid in the high-absorbency water storage layer 3, it can change color and be seen through the semi-transparent base layer 4, so as to remind parents to change the diaper 5 in time.

[0027] In a further preferred embodiment, three water-sensitive color-changing indicator strips 13 are provided, evenly distributed in the middle and on both sides of the main body 6, forming a distributed monitoring network. Regardless of whether the infant is lying on their back, side, or stomach, urine wetting the core from any position will trigger at least one or more indicator strips to change color, greatly reducing the probability of missed detection due to urine not contacting a single indicator strip.

[0028] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency flow-guiding core hydroentangled nonwoven fabric, characterized in that: It includes a skin-friendly antibacterial layer (1), a three-dimensional flow guiding layer (2) is provided on the outside of the skin-friendly antibacterial layer (1), a highly absorbent water storage layer (3) is provided on the outside of the three-dimensional flow guiding layer (2), a highly absorbent resin is provided inside the highly absorbent water storage layer (3), and a base bottom layer (4) is provided on the outside of the highly absorbent water storage layer (3), the base bottom layer (4) is PP spunbond nonwoven fabric.

2. The high-efficiency flow-guiding core hydroentangled nonwoven fabric according to claim 1, characterized in that: The skin-friendly antibacterial layer (1) is a spunlace fabric made of chitin fiber and ES fiber.

3. The high-efficiency flow-guiding core hydroentangled nonwoven fabric according to claim 1, characterized in that: The three-dimensional flow guide layer (2) is composed of three-dimensional curled hollow polyester fiber and polyester low melting point hot melt fiber.

4. A diaper using the high-efficiency diversion core spunlace nonwoven fabric according to any one of claims 1-3, characterized in that: The diaper (5) includes a body (6) comprising a high-efficiency flow-guiding core spunlace nonwoven fabric and a waist support (7) fixedly connected to the body (6), the waist support (7) comprising a front waist (8) and a back waist (9).

5. The diaper according to claim 4, characterized in that: The back waist (9) is split into two sections at one end. One section has a hook and loop fastener (10) on its outer surface and the other section has a hook and loop fastener (11) on its inner surface that corresponds to the hook and loop fastener (10).

6. The diaper according to claim 5, characterized in that: The waist support (7) has vertical tear lines (12) on both sides of the middle part.

7. The diaper according to claim 4, characterized in that: A water-sensitive color-changing indicator strip (13) is provided between the high-absorption water storage layer (3) and the foundation bottom layer (4).

8. The diaper according to claim 7, characterized in that: The water-sensitive color-changing indicator strip (13) is provided in three strips, which are evenly distributed in the middle and on both sides of the main body (6).

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