Anti-reverse osmosis absorption core structure

Abstract

The utility model relates to an anti-reverse osmosis absorption core structure which comprises a first SMS non-woven fabric, a first hydrophilic non-woven fabric, a water-absorbent resin layer and a second SMS non-woven fabric which are arranged from bottom to top, the first SMS non-woven fabric comprises a first hydrophobic layer, a first weak hydrophilic layer and a first hydrophilic layer which are sequentially arranged from bottom to top, and the second SMS non-woven fabric comprises a second hydrophobic layer, a second weak hydrophilic layer and a second hydrophilic layer which are sequentially arranged from bottom to top. The second SMS non-woven fabric comprises a second hydrophobic layer, a second weak hydrophilic layer and a second hydrophilic layer which are sequentially arranged from bottom to top. The second SMS non-woven fabric consisting of the first hydrophobic layer, the first weak hydrophilic layer and the first hydrophilic layer is arranged above the water-absorbent resin layer, so that one-way moisture conduction is realized, liquid can be quickly guided into the water-absorbent resin layer, and the liquid is prevented from being accumulated on the surface of the core body to cause back seepage.

Description

Technical Field

[0001] This utility model relates to the field of absorbent core technology, specifically to an anti-reverse osmosis absorbent core structure. Background Technology

[0002] With economic development and improved living standards, people have higher requirements for absorbent hygiene products such as sanitary napkins and diapers. Besides being thin and quick-absorbing, the dryness of the surface layer has become a major concern. Most absorbent cores on the market have a hydrophilic, permeable surface in direct contact with the absorbent layer. During activities, liquid in the absorbent layer often seeps from the permeable surface to the surface layer, leaving the skin damp and causing maceration. This results in poor user experience and comfort, and in severe cases, skin infections and health threats. Utility Model Content

[0003] The purpose of this invention is to provide an anti-reverse osmosis absorption core structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A backflow prevention and absorption core structure includes, from bottom to top, a first SMS nonwoven fabric, a first hydrophilic nonwoven fabric, a water-absorbing resin layer, and a second SMS nonwoven fabric. The first SMS nonwoven fabric includes, from bottom to top, a first hydrophobic layer, a first weakly hydrophilic layer, and a first hydrophilic layer. The second SMS nonwoven fabric includes, from bottom to top, a second hydrophobic layer, a second weakly hydrophilic layer, and a second hydrophilic layer.

[0006] In one possible implementation, a second hydrophilic nonwoven fabric is disposed above the second SMS nonwoven fabric.

[0007] In one possible implementation, the first SMS nonwoven fabric or the second SMS nonwoven fabric is made of one or two of polypropylene and polyethylene terephthalate.

[0008] In one possible implementation, the first or second hydrophilic nonwoven fabric is made of bicomponent ES fiber, which is one or both of PE / PP composite fiber or PE / PET composite fiber.

[0009] In one possible implementation, the basis weight of the first SMS nonwoven fabric or the second SMS nonwoven fabric is 10 g / m². 2 -25g / m 2 .

[0010] In one possible implementation, the basis weight of the first hydrophilic nonwoven fabric or the second hydrophilic nonwoven fabric is 10 g / m².2 -30g / m 2 .

[0011] In one possible implementation, the absorbent resin layer is made of SAP with a mesh size of 50-300 mesh.

[0012] In one possible implementation, the absorbent resin layer and the first hydrophilic nonwoven fabric or the second SMS nonwoven fabric are bonded together by hot melt adhesive.

[0013] In one possible implementation, the first SMS nonwoven fabric and the first hydrophilic nonwoven fabric are bonded by ultrasonic welding or hot melt adhesive.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] By setting a hydrophilic nonwoven fabric layer below the absorbent resin layer, liquid can be quickly diverted. By setting a second SMS nonwoven fabric composed of a first hydrophobic layer, a first weakly hydrophilic layer, and a first hydrophilic layer above the absorbent resin layer, one-way moisture conduction is achieved, allowing liquid to be quickly introduced into the absorbent resin layer and preventing liquid from accumulating on the core surface and causing backflow. In addition, the contact surface between the second SMS nonwoven fabric and the absorbent resin layer is a hydrophobic layer, which can effectively prevent liquid in the absorbent resin layer from seeping back into the surface layer, effectively improving the anti-backflow performance of the core. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0017] Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0018] Figure 3 This is a cross-sectional view of Embodiment 2 of the present invention. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0020] Example 1, such as Figure 1 , 2As shown, an anti-reverse osmosis absorbent core structure includes a first SMS nonwoven fabric 10, a first hydrophilic nonwoven fabric 20, a water-absorbing resin layer 30, and a second SMS nonwoven fabric 40 arranged from bottom to top. The first SMS nonwoven fabric 10 includes a first hydrophobic layer 11, a first weakly hydrophilic layer 12, and a first hydrophilic layer 13 arranged from bottom to top. The second SMS nonwoven fabric 40 includes a second hydrophobic layer 41, a second weakly hydrophilic layer 42, and a second hydrophilic layer 43 arranged from bottom to top.

[0021] After coating the outer surface of the aforementioned core structure with a PE film, it can be used in sanitary products such as sanitary napkins and diapers.

[0022] Specifically, the first SMS nonwoven fabric 10 or the second SMS nonwoven fabric 40 is made of one or two of polypropylene and polyethylene terephthalate. For both SMS nonwoven fabrics, the hydrophobic and hydrophilic layers are made of spunbond nonwoven fabric, while the weakly hydrophilic layer is made of meltblown nonwoven fabric. The hydrophilic layer can be prepared by adding hydrophilic agents such as polyurethane, polyamide, or vinyl alcohol during the preparation of the SMS nonwoven fabric, giving it good hydrophilic properties. The hydrophobic layer, however, does not contain any hydrophilic agents and relies on the inherent hydrophobicity of the material itself. In this invention, the use of a second SMS nonwoven fabric effectively solves the backflow problem, allowing the liquid to flow back into the absorbent resin.

[0023] The first hydrophilic nonwoven fabric 20 or the second hydrophilic nonwoven fabric 50 is made of bicomponent ES fiber, which is one or both of PE / PP composite fiber and PE / PET composite fiber. The first hydrophilic nonwoven fabric 20 or the second hydrophilic nonwoven fabric 50 can be prepared by hot air or hot rolling processes. The first SMS nonwoven fabric 10 or the second SMS nonwoven fabric 40 has a basis weight of 10 g / m². 2 -25g / m 2 The basis weight of the first hydrophilic nonwoven fabric 20 or the second hydrophilic nonwoven fabric 50 is 10 g / m². 2 -30g / m 2 The absorbent resin layer 30 is made of SAP with a mesh size of 50-300 mesh. Unlike other hygiene products where SAP accounts for approximately 25% to 50% of the weight of the entire core structure, in this invention, the weight percentage of SAP can reach 40% to 80%, thereby improving the absorption capacity of liquids and reducing the amount of liquid backflow.

[0024] The absorbent resin layer 30 and the first hydrophilic nonwoven fabric 20 or the second SMS nonwoven fabric 40 are bonded together with hot melt adhesive. The first SMS nonwoven fabric 10 and the first hydrophilic nonwoven fabric 20 are bonded together by ultrasonic welding or hot melt adhesive.

[0025] Example 2, as follows Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that a second hydrophilic nonwoven fabric is disposed above the second SMS nonwoven fabric 40. Adding the second hydrophilic nonwoven fabric improves the efficiency of liquid absorption. The second hydrophilic nonwoven fabric can be bonded to the second SMS nonwoven fabric 40 by ultrasonic welding or hot melt adhesive bonding.

[0026] 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 communication 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.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A reverse osmosis prevention and absorption core structure, characterized in that, The first SMS nonwoven fabric (10), the second SMS nonwoven fabric (20), the third SMS nonwoven fabric (30), and the fourth SMS nonwoven fabric (40) are arranged from bottom to top. The first SMS nonwoven fabric (10) includes a first hydrophobic layer (11), a first weakly hydrophilic layer (12), and a first hydrophilic layer (13) arranged from bottom to top. The second SMS nonwoven fabric (40) includes a second hydrophobic layer (41), a second weakly hydrophilic layer (42), and a second hydrophilic layer (43) arranged from bottom to top.

2. The anti-reverse osmosis absorbent core structure according to claim 1, characterized in that, A second hydrophilic nonwoven fabric (50) is disposed on top of the second SMS nonwoven fabric (40).

3. The anti-reverse osmosis absorbent core structure according to claim 1, characterized in that, The first SMS nonwoven fabric (10) or the second SMS nonwoven fabric (40) is made of one or two of polypropylene and polyethylene terephthalate.

4. The anti-reverse osmosis absorbent core structure according to claim 2, characterized in that, The first hydrophilic nonwoven fabric (20) or the second hydrophilic nonwoven fabric (50) uses bicomponent ES fiber, which is one or both of PE / PP composite fiber or PE / PET composite fiber.

5. The anti-reverse osmosis absorbent core structure according to claim 1, characterized in that, The basis weight of the first SMS nonwoven fabric (10) or the second SMS nonwoven fabric (40) is 10 g / m². 2 -25g / m 2 .

6. The anti-reverse osmosis absorbent core structure according to claim 2, characterized in that, The basis weight of the first hydrophilic nonwoven fabric (20) or the second hydrophilic nonwoven fabric (50) is 10 g / m². 2 -30g / m 2 .

7. The anti-reverse osmosis absorbent core structure according to claim 1, characterized in that, The absorbent resin layer (30) is made of SAP with a mesh size of 50-300 mesh.

8. The anti-reverse osmosis absorbent core structure according to claim 1, characterized in that, The absorbent resin layer (30) and the first hydrophilic nonwoven fabric (20) or the second SMS nonwoven fabric (40) are bonded together by hot melt adhesive.

9. The anti-reverse osmosis absorbent core structure according to claim 1, characterized in that, The first SMS nonwoven fabric (10) and the first hydrophilic nonwoven fabric (20) are bonded by ultrasonic welding or hot melt adhesive.

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