Preparation method of automobile multilayer compound mesh film and compound seat cushion leather

Abstract

The invention relates to a preparation method of an automobile multilayer compound mesh film. The preparation method of the automobile multilayer compound mesh film comprises the following steps: successively melting and blowing an inner mesh film, a coupling layer and an outer mesh film respectively by using three independent melting and blowing die heads through a non-woven hot-melted mesh filmmelting and blowing technology; and applying pressure to the obtained compound material to obtain the automobile multilayer compound mesh film. The invention also discloses a preparation method of compound seat cushion leather. The preparation method of the compound seat cushion leather comprises the following steps: successively stacking leather, the automobile multilayer composite mesh film andsponge from bottom to top, wherein the inner mesh film and the outer mesh film of the automobile multilayer compound mesh film are respectively clung to the leather and the sponge; heating through infrared ray, hot pressing and compounding to obtain the compound seat cushion leather. The preparation method of the compound seat cushion leather is simple in production process, excellent in operationenvironment and low in operation strength of workers, and is capable of achieving safe and environment-friendly production; the prepared seat cushion leather multilayer compound material is high in peeling strength and high in air permeability, is compounded under low temperature, and is free of damage to the leather; the leather is high in flexibility and free of release of harmful gases such asformaldehyde and methylbenzene and the like.

Description

technical field [0001] The invention relates to the technical field of processing polymer composite materials, in particular to a method for preparing a multi-layer composite omentum for vehicles and composite cushion leather goods. Background technique [0002] Hot-melt adhesive films have been widely used in the bonding of automotive interior materials, but because the existing hot-melt adhesive films used in automotive interiors are generally single-layer films or multi-layer symmetrical structures, the two sides of the film cannot be bonded differently. It is a highly resistant material, so its application range is limited to a certain extent. At present, it can only be used for the bonding of materials such as car roofs and car chassis. In addition, if there are phenomena such as bubbling during the bonding process, the film needs to be punched through a punching machine, and the process is relatively cumbersome. Invention patent CN 201510106668.9 discloses a composite...

AI Technical Summary

Problems solved by technology

[0002] Hot-melt adhesive films have been widely used in the bonding of automotive interior materials, but because the existing hot-melt adhesive films used in automotive interiors are generally single-layer films or multi-layer symmetrical structures, the two sides of the film cannot be bonded differently. Therefore, its application range is limited to a certain extent. At present, it can only be used in the bonding of materials such as car roofs and car chassis.

In addition, if there are phenomena such as bubbling during the bonding process, the film needs to be punched through a punching machine, and the process is relatively cumbersome.

Invention patent CN 201510106668.9 discloses a composite hot-melt adhesive omentum and its preparation process, especially a composite hot-melt adhesive omentum for bonding metal and non-polar materials and its preparation process. The invention obtained Related products cannot meet the needs of polymer materials such as leather and sponge and the bonding of different materials with large differences; the invention patent CN201510161382.0 discloses a hot-melt adhesive omentum and its preparation process, and mentions a bamboo charcoal fiber The hot-melt adhesive film products make the hot-melt adhesive film itself have the functions of moisture absorption, breathability, antibacterial and antibacterial, anti-ultraviolet radiation, deodorization and adsorption, etc., improve the environmental protection and comfort of the product, and expand the existing hot-melt adhesive film The performance of the product, but it still cannot meet the needs of bonding different materials with lower bonding temperature requirements and large differences

The flame composite method is to burn the surface of the sponge with fire to make it melt, and then quickly combine the cortex with it to achieve the purpose of adhesiveness. However, some toxic gases (such as isocyanate) will be generated when the surface of the sponge is burned, and some will The residue is released slowly in the car seat cushion, thus polluting the air in the car

Another glue bonding method is to spray a layer of glue on the surface of the sponge, and then combine it with the cortex. However, because there are a lot of toxic substances such as formaldehyde and toluene in the glue, they will also be released slowly and cause air pollution in the car.

In addition, these production processes will seriously affect the health of production line workers

[0004] How to improve the bonding strength of leather and sponge with large differences in the car seat cushion, maintain the original texture and toughness of the car seat leather, reduce the environmental pollution problem in the car, and simplify the production process of the multi-layer composite film at the same time. Related reports appear

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