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Method for producing synthetic leather for clothes by chemical foaming pore forming coating technology

A technology of foam coating and coating technology, which is applied in the direction of textiles, papermaking, and dry-cleaning fiber products. It can solve the problems of low product quality and grade, poor water vapor permeability and air permeability of synthetic leather, and difficulty in meeting performance requirements, etc. problems, to achieve the effect of improving water vapor permeability and air permeability

Inactive Publication Date: 2012-06-20
福建可利得皮革纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this process uses a solvent-based finishing system, the result is a closed coating. This coating makes the water vapor permeability and air permeability of the finished synthetic leather very poor, resulting in poor hygienic performance and product quality of synthetic leather for clothing. And the grade is not high, it is difficult to meet the performance requirements as a clothing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Bottom foam coating

[0021] First, 50 parts of soft solvent-based polyurethane with a solid content of 30% by mass parts, 60 parts of methyl ethyl ketone (MEK), 3 parts of blowing agent azodicarbonamide, 0.8 part of calcium stearate and 4 parts of 8- Higher alkanols with 31 carbon atoms are mixed and stirred evenly to make bottom layer foam coating slurry;

[0022] Then, utilize the method for roller coating to coat the bottom foaming coating slurry on the front side of the nonwoven fabric for synthetic leather, and the application amount is 160g / m 2 , and then enter the drying tunnel to dry at 60°C, and finally use a roller ironing machine to iron and foam at 180°C to form a bottom foam coating on the surface of the non-woven fabric for synthetic leather;

[0023] 2) Dry film transfer coating

[0024] First, mix and stir 80 parts of medium-hard solvent-based polyurethane with a solid content of 30%, 100 parts of methyl ethyl ketone (MEK), 50 parts of toluene and ...

Embodiment 2

[0030] 1) Bottom foam coating

[0031] First, 70 parts by mass of soft solvent-based polyurethane with a solid content of 30%, 50 parts of methyl ethyl ketone (MEK), 5 parts of blowing agent azodicarbonamide, 0.5 part of calcium stearate and 3 parts of 8- Higher alkanols with 31 carbon atoms are mixed and stirred evenly to make bottom layer foam coating slurry;

[0032] Then, utilize the method of roller coating to coat the bottom layer foam coating slurry on the front side of the nonwoven fabric for synthetic leather, and the application amount is 200g / m 2 , and then enter the drying tunnel to dry at 80°C, and finally use a roller ironing machine to iron and foam at 140°C to form a bottom foam coating on the surface of the non-woven fabric for synthetic leather;

[0033] 2) Dry film transfer coating

[0034]First, mix and stir 60 parts of medium-hard solvent-based polyurethane with a solid content of 30%, 80 parts of methyl ethyl ketone (MEK), 45 parts of toluene and 3 part...

Embodiment 3

[0040] 1) Bottom foam coating

[0041] First, 80 parts of soft solvent-based polyurethane with a solid content of 30% by mass parts, 70 parts of methyl ethyl ketone (MEK), 2 parts of blowing agent azodicarbonamide, 0.9 part of calcium stearate and 5 parts of 8~ Higher alkanols with 31 carbon atoms are mixed and stirred evenly to make bottom layer foam coating slurry;

[0042] Then, utilize the method of roller coating to coat the bottom foaming coating slurry on the front side of the nonwoven fabric for synthetic leather, and the application amount is 240g / m 2 , and then enter the drying tunnel to dry at 68°C, and finally use a roller ironing machine to iron and foam at 150°C to form a bottom foam coating on the surface of the non-woven fabric for synthetic leather;

[0043] 2) Dry film transfer coating

[0044] First, mix and stir 50 parts of medium-hard solvent-based polyurethane with a solid content of 30%, 60 parts of methyl ethyl ketone (MEK), 30 parts of toluene and 4 ...

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Abstract

A method for producing synthetic leather for clothes by chemical foaming pore forming coating technology adopts a nonwoven fabric for synthetic leather as a base material, employs multilayer chemical foaming hole forming coating technology, solves problems in production process of synthetic leather for clothes, and produces synthetic leather for clothes with high performance. A bottom foamed coating is manufactured on a surface of a nonwoven fabric for synthetic leather through a roller coating method by using mixed slurry containing solvent-type polyurethane, a chemical foaming agent, a low temperature foaming modifier and a pore forming agent; original solvent-type polyurethane wet-method solidification coating technology is substituted; and the solvent pollution problem and the solventresidue problem of DMF are solved; a film is formed on a release paper surface through a scrape coating method by mixed slurry containing solvent-type polyurethane and the pore forming agent; an adhesive is coated on the film by scrape coating; then the film is adhered to the nonwoven fabric for synthetic leather with the bottom foamed coating; a solvent-type polyurethane dry-method transfer-filmcoating is formed on the bottom foamed coating; and finally water washing is performed to obtain the synthetic leather for clothes.

Description

technical field [0001] The invention relates to a production process of synthetic leather, in particular to a method for producing synthetic leather for clothing by using chemical foaming pore-causing coating technology. Background technique [0002] Synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. Usually, the non-woven fabric impregnated with high molecular polymer is used as the simulated mesh layer, and the microporous polyurethane layer is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have certain air permeability Artificial leather is closer to natural leather and is widely used to make shoes, boots, bags and ball games. [0003] According to the statistics of the National Bureau of Statistics on the output of 316 artificial leather and synthetic leather enterprises above designated size...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06L1/12
Inventor 施凌山马兴元张晓镭牛建民
Owner 福建可利得皮革纤维有限公司
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