Wet-state anti-layering absorption composite material and production process thereof

Abstract

The invention relates to a wet-state anti-layering absorption composite material and a production process, the wet-state anti-layering absorption composite material comprises a surface layer, an absorption layer and a bottom layer, the absorption layer comprises SAP particles, the SAP particles are located between the surface layer and the bottom layer, and the SAP particles are at least adhered to the surface layer or the bottom layer. The method has the advantage that the probability of occurrence of a layering phenomenon in use can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of sanitary products, and in particular to a wet anti-delamination absorbent composite material and a production process. Background Art

[0002] Hygiene products, such as diapers and sanitary napkins, are used to absorb liquids and usually have an absorbent core. However, the existing absorbent cores may delaminate during use, which affects their use. Summary of the Invention

[0003] In view of the shortcomings of the prior art, one of the objectives of the present application is to provide a wet anti-delamination absorbent composite material and a production process, which has the advantage of reducing the probability of delamination during use.

[0004] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0005] A wet anti-delamination absorbent composite material comprises a surface layer, an absorbent layer and a bottom layer. The absorbent layer comprises SAP particles, the SAP particles are located between the surface layer and the bottom layer, and the SAP particles are at least adhered to the surface layer or the bottom layer.

[0006] By adopting the above technical solution, during use, the SAP particles are adhered to the surface layer or the bottom layer. Therefore, after the SAP particles absorb water, they will still be fixed on the surface layer or the bottom layer, thereby reducing the probability of delamination during use.

[0007] The present application also discloses a production process for a wet anti-delamination absorbent composite material: used to produce the above-mentioned wet anti-delamination absorbent composite material, comprising the following production steps: a coating step, coating the surface layer and the bottom layer with glue, a bonding step, bonding SAP particles to the surface layer and the bottom layer, an air permeability testing step, testing the air permeability of the surface layer and the bottom layer after the SAP particles are bonded, a firmness testing step, testing the adhesion firmness of the SAP particles, and a compounding step, compounding the surface layer and the bottom layer that meet the standards to form a composite material.

[0008] By adopting the above technical solution, that is, by testing the firmness and air permeability during production, the liquid penetration effect of the product can be achieved as expected, and the connection strength between the SAP particles and the surface layer and the bottom layer can be achieved as expected.

[0009] In a preferred example, the present application can be further configured as follows: in the firmness testing step and the air permeability testing step, a testing roller is used, the testing roller is hollow and has air vents, the surface layer or the bottom layer contacts the testing roller and forms a wrap angle with the testing roller, and covers the air vents on the testing roller; after the air permeability testing step, observe whether SAP particles on the surface layer or the bottom layer have fallen off; if the area where there is falling off is larger than the standard value, it indicates that the SAP bonding effect does not meet the standard.

[0010] By adopting the above technical solution, that is, when the surface layer or the bottom layer passes through the detection roller, due to the curvature of the surface layer or the bottom layer and the discharge of gas from the air outlet, the SAP particles with weaker connection strength will fall under the action of the air flow and the curvature of the surface layer, thereby achieving the purpose of detecting air permeability and firmness.

[0011] In a preferred example, the present application can be further configured as follows: a plurality of air ducts are provided in the detection roller, the length direction of the air ducts is parallel to the axial direction of the detection roller, the plurality of air ducts are evenly distributed in the detection roller, and are connected to the inner wall of the detection hole, and the air ducts are communicated with the axially arranged air outlet holes on the detection roller.

[0012] By adopting the above technical solution, only the air duct in contact with the surface layer or the bottom layer will discharge gas, thereby achieving the purpose of saving gas usage.

[0013] In a preferred example, the present application can be further configured as follows: in the coating step, bonding areas and vacant areas are provided on both the surface layer and the bottom layer, and the bonding areas are coated with glue; in the compounding step, a core layer is further provided between the surface layer and the bottom layer, and the core layer is provided with protrusions corresponding to the vacant areas.

[0014] By adopting the above technical solution, that is, the protrusions are located between the SAP particles bonded to the surface layer or the bottom layer, when the SAP particles absorb water and expand, they will produce an extrusion and positioning effect on the protrusions, thereby reducing the probability of core layer displacement and reducing the probability of overall delamination.

[0015] In a preferred example, the present application can be further configured as follows: the protrusions include non-woven fabric and SAP particles, and the SAP particles are located in the strips formed by the non-woven fabric.

[0016] By adopting the above technical solution, the SAP particles in the protrusions and the SAP particles bonded to the surface layer or the bottom layer will expand after absorbing water, thereby achieving a better positioning effect. DETAILED DESCRIPTION

[0017] The present application discloses a wet anti-delamination absorbent composite material, comprising a surface layer, an absorbent layer and a bottom layer, wherein the absorbent layer is located between the surface layer and the bottom layer, the absorbent layer comprises SAP particles and a core layer, both the surface layer and the bottom layer are provided with bonding areas and vacant areas, the bonding areas are coated with glue for bonding the above-mentioned SAP particles, the core layer comprises a core body and protrusions, the protrusions are arranged on the surface of the core body and correspond to the vacant areas, the core body comprises a sac-like structure formed by a non-woven fabric, the interior of which is filled with wood pulp fibers and SAP particles, the protrusions comprise long strip-shaped structures formed by a non-woven fabric, the interior of which is filled with SAP particles and wood pulp fibers, wherein the SAP particles are located in a direction close to the surface layer or the bottom layer (i.e., when the protrusions are located on the side of the core body close to the surface layer, the SAP particles in the protrusions are located in a direction close to the surface layer (i.e., above the protrusions); similarly, when the protrusions are located on the side of the core body close to the bottom layer, the SAP particles in the protrusions are located in a direction close to the bottom layer (i.e., below the protrusions)), and the SAP particles and wood pulp fibers are separated by toilet paper or non-woven fabric.

[0018] The present application also discloses a production process of a wet state anti-delamination absorbent composite material, which is used to produce the above-mentioned wet state anti-delamination absorbent composite material, comprising the following production steps:

[0019] In the coating step, the surface layer is divided into a bonding area and a vacant area, and the bonding area between the surface layer and the bottom layer is coated with glue.

[0020] Bonding step: bonding SAP particles to the surface layer and the bottom layer.

[0021] In the air permeability test step, the air permeability of the surface layer and the bottom layer after the SAP particles are bonded is tested. If the air permeability is poor, the area with poor air permeability is punched.

[0022] Firmness testing step, testing the adhesion firmness of SAP particles,

[0023] In the compounding step, the surface layer, the absorption layer and the bottom layer that meet the standards are compounded to form a composite material.

[0024] During the firmness and air permeability testing steps, a hollow test roller with air holes is used. Multiple air ducts are located within the roller, their lengths parallel to the roller's axis. These ducts are evenly distributed throughout the roller and connected to the inner walls of the test holes. The ducts communicate with the axially aligned air holes on the roller. The top or bottom layer is in contact with the test roller, forming a wrap angle with it and covering the air holes. After the air permeability test, the top or bottom layer is observed for any loose SAP particles. If the area of ​​loose SAP particles exceeds the specified value, the SAP adhesion does not meet the specified standards.

[0025] The implementation principle of this embodiment is: during use, the probability of SAP particles moving is reduced by adhering them to the surface layer and the bottom layer. At the same time, after absorbing water, the SAP particles located on both sides of the protrusion will expand and clamp the protrusion. Since the SAP particles in the protrusion are close to the corresponding surface layer or bottom layer, after absorbing water, they cooperate with the SAP particles adhered to the surface layer or the bottom layer, so that the core layer can be limited, thereby reducing the probability of displacement and delamination.

[0026] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A wet anti-delamination absorbent composite material, characterized by: The invention comprises a surface layer, an absorption layer and a bottom layer. The absorption layer comprises SAP particles. The SAP particles are located between the surface layer and the bottom layer, and the SAP particles are at least adhered to the surface layer or the bottom layer.

2. A process for producing a wet anti-delamination absorbent composite material, characterized by: The method for producing a wet anti-delamination absorbent composite material as claimed in claim 1 comprises the following production steps: a coating step of coating the surface layer and the bottom layer with glue; a bonding step of bonding SAP particles to the surface layer and the bottom layer; an air permeability testing step of testing the air permeability of the surface layer and the bottom layer after bonding the SAP particles; a firmness testing step of testing the adhesion firmness of the SAP particles; and a compounding step of compounding the surface layer and the bottom layer that meet the standards to form a composite material.

3. The production process of a wet anti-delamination absorbent composite material according to claim 2, characterized in that: In the firmness test step and the air permeability test step, a test roller is used. The test roller is hollow and has air holes. The surface layer or the bottom layer contacts the test roller and forms a wrap angle with the test roller, and covers the air holes on the test roller. After the air permeability test step, observe whether the SAP particles on the surface layer or the bottom layer are detached. If the detached area is larger than the standard value, it indicates that the SAP bonding effect does not meet the standard.

4. The process for producing a wet anti-delamination absorbent composite material according to claim 3, wherein: There are also multiple air ducts in the detection roller. The length direction of the air ducts is parallel to the axial direction of the detection roller. The multiple air ducts are evenly distributed in the detection roller and connected to the inner wall of the detection hole. The air ducts are connected to the axially arranged air outlet holes on the detection roller.

5. The production process of a wet anti-delamination absorbent composite material according to claim 4, characterized in that: In the coating step, bonding areas and vacant areas are provided on both the surface layer and the bottom layer, and the bonding areas are coated with glue. In the compounding step, a core layer is provided between the surface layer and the bottom layer, and protrusions corresponding to the vacant areas are provided on the core layer.

6. The process for producing a wet anti-delamination absorbent composite material according to claim 5, characterized in that: The protrusions include non-woven fabric and SAP particles, and the SAP particles are located in the strips formed by the non-woven fabric.