Production method of solvent-free foaming type polyurethane synthetic leather

A technology of solvent-free polyurethane and foamed polyurethane, which is applied in the field of synthetic leather, can solve the problems of expensive solvents, high manufacturing costs, and volatile solvents, and achieve the effects of avoiding foam defects, high production efficiency, and good stability

Inactive Publication Date: 2017-12-01
三明建华纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this preparation method has excellent film-forming performance, because the solvents used are usually toluene, dimethylformamide, ethyl acetate, butanone, etc., these solvents are volatile and cause environmental pollution. expensive to manufacture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 of the present invention is: a production method of solvent-free foamed polyurethane synthetic leather, comprising the following steps: S10, mixing the solvent-free polyurethane foamed slurry and coating it on the base cloth, 120°C, 20MPa Under heating and curing to obtain foamed polyurethane base cloth;

[0042] S20. After mixing the surface layer slurry, coat it on the release paper, dry it at 140°C as the surface layer, and then attach it to the foamed polyurethane base cloth obtained in step S10, perform embossing or absorbing patterns, and cool Finally, the solvent-free foamed polyurethane synthetic leather is obtained after peeling off the release paper;

[0043] Wherein, the solvent-free polyurethane foaming slurry is formed by mixing and stirring components A and B with a weight ratio of 4:1 for 15-25 minutes, and the component A is composed of polyol, white carbon black, hydroxyl silicone oil, Fatty acid, fatty acid metal salt, unsaturated carboxy...

Embodiment 2

[0046] Embodiment 2 of the present invention is: a production method of solvent-free foamed polyurethane synthetic leather, comprising the following steps: S10, after mixing the solvent-free polyurethane foam slurry, scrape it on the base cloth, 180 ° C, 0.05 Heating and curing under MPa to obtain foamed polyurethane base cloth;

[0047] S20. After mixing the surface layer slurry evenly, coat it on the release paper, dry it at 130°C as the surface layer, and then attach it to the foamed polyurethane base cloth obtained in step S10, emboss or absorb patterns, and cool Finally, the solvent-free foamed polyurethane synthetic leather is obtained after peeling off the release paper;

[0048] Wherein, the solvent-free polyurethane foam slurry is formed by mixing and stirring components A and B at a weight ratio of 2:1 for 15-25 minutes, and the component A is composed of polyol, white carbon black, hydroxyl silicone oil, Fatty acid, fatty acid metal salt, unsaturated carboxylate, o...

Embodiment 3

[0051] Embodiment 3 of the present invention is: a production method of solvent-free foamed polyurethane synthetic leather, comprising the following steps: S10, mixing the solvent-free polyurethane foamed slurry and coating it on the base cloth, 150°C, 10MPa Under heating and curing to obtain foamed polyurethane base cloth;

[0052] S20. After mixing the surface layer slurry, coat it on the release paper, dry it at 125°C as the surface layer, and then attach it to the foamed polyurethane base cloth obtained in step S10, emboss or absorb the pattern, and cool Finally, the solvent-free foamed polyurethane synthetic leather is obtained after peeling off the release paper;

[0053] Wherein, the solvent-free polyurethane foaming slurry is formed by mixing and stirring component A and component B with a weight ratio of 3:1 for 15-25 minutes, and the component A is composed of polyol, white carbon black, hydroxyl silicone oil, Fatty acid, fatty acid metal salt, unsaturated carboxyla...

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PUM

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Abstract

The invention discloses a production method of solvent-free foaming type polyurethane synthetic leather. The method comprises steps as follows: solvent-free polyurethane foaming slurry is applied to base cloth after being uniformly mixed, and then is heated and cured, and foaming polyurethane base cloth is obtained; surface layer slurry is applied to release paper after being mixed uniformly, dried to serve as a surface layer and then attached to the obtained foaming polyurethane base cloth, embossing is performed, the release paper is stripped after cooling, and the solvent-free foaming type polyurethane synthetic leather is obtained; the solvent-free polyurethane foaming slurry is prepared from a component A and a component B in the weight ratio being (2-4):1 through mixing, wherein the component A is prepared from polyhydric alcohols, white carbon black, hydroxyl silicone oil, fatty acid, fatty acid metal salt, unsaturated carboxylate, organic peroxides and a functional aid I, and the component B is prepared from isocyanate; the surface layer slurry is prepared from waterborne polyurethane resin, higher aliphatic alcohol and a functional aid I. Compared with the prior art, the production method has the advantages of being clean, environment-friendly, simple and convenient to operate and the like.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, and in particular relates to a production method of solvent-free foamed polyurethane synthetic leather. Background technique [0002] Since 1963, DuPont of the United States successfully researched the polyurethane synthetic leather brand Corfam, the polyurethane synthetic leather manufacturing industry has been in commercial production for more than 50 years. Because the feel and softness of polyurethane synthetic leather are very close to natural leather, it has been widely loved by people. Especially recently, with the enhancement of people's awareness of animal protection, the polyurethane synthetic leather industry has developed vigorously. However, the traditional polyurethane synthetic leather industry is mostly prepared by coating solvent-based elastomeric polyurethane on the base cloth, that is, the DMF solution of polyurethane resin is used to add various additives to make slu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14
CPCD06N3/0043D06N3/0077D06N3/0097D06N3/14
Inventor 王伟华
Owner 三明建华纺织有限公司
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