Production process of environmental protection PU composite leather and formula thereof

A production process and process technology, applied in textiles and papermaking, etc., can solve the problems of large molecular particles in the dense layer, which cannot be directly removed, and are easy to stick, and achieve the effect of reducing pollution

Active Publication Date: 2009-11-25
ANAN CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 encou

Method used

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  • Production process of environmental protection PU composite leather and formula thereof
  • Production process of environmental protection PU composite leather and formula thereof
  • Production process of environmental protection PU composite leather and formula thereof

Examples

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Example Embodiment

[0058] The present invention will be further described below in conjunction with the drawings and embodiments.

[0059] Environmental protection PU synthetic leather production process, the process includes:

[0060] The first stage: semi-finished base process flow:

[0061] Dissolve the wet PU resin in the DMF solvent to prepare a PU mixture for semi-finished substrates, use this mixture to impregnate and coat the non-woven fabric, and then put it in the solvent that has affinity with the solvent but is not compatible with the PU resin. In the liquid. The solvent in the mixed solution is extracted to form a wet film. In the process of extracting the solvent, continuous bubbles are generated, resulting in a porous film, which is washed with water to remove DMF from the film and then shaped and dried to obtain a semi-finished substrate.

[0062] The second stage: the technological process of semi-finished leather:

[0063] Dissolve the dry PU resin mixture in DMF and MEK, prepare t...

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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-...

Claims

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Application Information

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IPC IPC(8): D06N3/14
Inventor 林天送
Owner ANAN CHINA
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