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Coating cloth processing method

A processing method and technology of coating cloth, which can be applied in the direction of coating, device for coating liquid on the surface, textile and paper making, etc., can solve the problem of insufficient contact between water-based PU coating and coagulant, and achieve shortening and shortening of time and time. Process effect

Inactive Publication Date: 2017-02-22
张庆州
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method to solve the problem of insufficient contact between the above-mentioned water-based PU coating and coagulant

Method used

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  • Coating cloth processing method
  • Coating cloth processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, the processing method of coated cloth of the present invention comprises:

[0031] Step 1, forming a water-based PU slurry layer on the surface of a non-woven fabric, the means of forming the water-based PU slurry layer includes but not limited to coating or dipping; the water-based PU slurry is made of 97% to 99.9% of the mass proportion A mixed slurry made of water-based polyurethane resin (water-based PU) and 0.1% to 3% water-based thickener.

[0032] In step 2, the material in step 1 is placed in a closed room to contact the surface of the water-based PU slurry layer with a coagulant, and the means of contact include but not limited to spraying and coating. The coagulant is pressed into the water-based PU slurry layer by means of high temperature and high pressure, so that the entire water-based PU slurry layer is fully in contact with the coagulant for cross-linking or complexation. The coagulant is a substance that cross-links or complexes the water...

Embodiment 2

[0035] Embodiment 2, the processing method of coated cloth of the present invention, comprises:

[0036] Step 1, forming a water-based PU slurry layer on the surface of a release cloth, the means of forming the water-based PU slurry layer includes but not limited to coating or dipping. The water-based PU slurry is a mixed slurry prepared by configuring a water-based polyurethane resin (water-based PU) with a mass proportion of 97% to 99.9% and a water-based thickener of 0.1% to 3%.

[0037] Step 2, covering a nonwoven fabric on the surface of the water-based PU slurry layer;

[0038] In step 3, the material of step 2 is placed in a closed room to contact the surface of the release cloth with the coagulant, and the means of contact include but not limited to spraying and coating. The coagulant is pressed into the water-based PU slurry layer through the release cloth by means of high temperature and high pressure, so that the entire water-based PU slurry layer is fully in conta...

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Abstract

The invention relates to a coating cloth processing method, which comprises the following steps that 1, a water-based PU (poly urethane) pulp layer is formed on the surface of non-woven cloth; 2, the water-based PU pulp layer is in contact with a coagulating agent in a sealed chamber; the coagulating agent is pressed into the water-based PU pulp layer through high-temperature and high-pressure means, so that the whole water-based PU pulp layer is in full contact with the coagulating agent; 3, drying is performed for removing moisture in the water-based PU pulp layer, so that the water-based PU pulp layer is formed into a water-based PU film layer. The water-based PU film layer has uniform pore distribution, consistent elasticity and flexibility, and good anti-stripping intensity; the thickness of the water-based PU film layer trends to be consistent; the thickness of the water-based PU film layer at least maintains 95 percent to 99 percent of the thickness of the water-based PU pulp layer; the water-based PU film layer does not collapse.

Description

technical field [0001] The invention relates to a processing method of a coated cloth with a water-based PU film layer formed on the surface of a nonwoven cloth. Background technique [0002] The traditional PU coated cloth uses dimethylformamide (DMF) as a solvent production process. The production process requires a lot of water and produces a large amount of harmful waste water, which is a great harm to the environment. The coated cloth DMF residues cannot be avoided in the final product, which also has a great negative impact on use or recycling. [0003] Based on environmental protection and product safety, the process of replacing solvent-based PU with water-based PU was developed and made into products. Such as the production method of water-based PU gloves proposed by CN102429331B of the People's Republic of China, the method includes: Step 1: Cover the glove core soaked with a coagulant on the hand mold, and the coagulant is capable of crosslinking or complexing th...

Claims

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Application Information

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IPC IPC(8): D06N3/00D06N3/14B05D1/28B05D3/00
Inventor 张庆州
Owner 张庆州
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