Production process of environmental protection PU composite leather and formula thereof

Abstract

The invention relates to a production process of environmental protection PU syntheyic leather, semi-finished subbase: using PU mixed liquids to dip and cover non-woven fabrics to prepare subbase; then being added into solution that has compatibility with the solvent and has no compatibility with PU resin for wet filming, molding and drying; semi-finished leather: dissolving PU resin of dry method, preparing PU mixed liquid for epidermal layer; coating the epidermal layer on release paper by the mixed solution, then drying and cooling, and then a mixed solution of adhesive layer is coated on the epidermal layer to stick the semi-finished subbase, drying and stripping the release paper to obtain semi-finished leather; post treatment: mixing nano modified aliphatics PU resin with cross-linking agent to prepare nano treating agent to roll coating the semi-finished PU composite leather to obtain environmental protection PU composite leather. The wet formula is, PU resin of wet method, DMF, surface active agent, color paste; the dry formula is, PU resin of dry method, DMF, MEK, color powder; and formula of the third stage post treatment is, modified aliphatics PU resin and cross-linking agent.

Description

technical field [0001] The invention relates to a production process and formula of PU synthetic leather, in particular to a production process and formula of waterproof, oil-proof and anti-fouling high-grade environment-friendly PU synthetic leather. Background technique [0002] PU synthetic leather is a substitute material for leather. The production method is to dip polyurethane on fabric or non-woven fabric, and there are two methods of dry or wet coagulation to form a film. At present, due to the large molecular particles of the dense layer formed by the surface resin, the general PU synthetic leather is easy to stick to water, oil, dust and other pollutants, and cannot be removed directly. It needs to be washed in water with detergent to achieve the purpose of cleaning. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of high-grade synthetic leather of waterproof, oil-...

AI Technical Summary

Problems solved by technology

At present, due to the large molecular particles of the dense layer formed by the surface resin of general PU synthetic leather, it is easy to stick when encountering water, oil, dust and other pollutants, and cannot be removed directly. It needs to be washed in water with detergent to achieve the purpose of cleaning.

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