Production method of protein synthetic leather based on salt coagulation and solidification

A production method and protein technology, applied in the field of synthetic leather, can solve the problems of poor water vapor permeability, solvent pollution, and poor moisture absorption and dehumidification, and achieve the effects of good physical and mechanical properties and safe production environment.

Inactive Publication Date: 2013-04-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

DMF (dimethylformamide) is used as solvent in this process, which will cause solvent pollution of DMF during processing
Second, water cannot completely replace the DMF in polyurethane, which will cause the problem of DMF residue in the product, and eventually cause product safety problems
And this kind of product safety problem will restrict products from entering the high-end market amidst numerous technical barriers and trade barriers.
Third, there are very few active groups on solvent-based polyurethane, which makes it difficult for most dyes to be dyed, and its washing fastness is very poor
Fourth, there are very few hydrophilic groups on the solvent-based polyurethane, which leads to poor water vapor permeability and poor moisture absorption and drainage of solvent-based polyurethane synthetic leather, that is, poor hygienic performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Preparation of impregnating solution: 60 parts by mass of water-soluble protein gelatin with a solid content of 20% and 15 parts of anionic fatliquor sulfated castor oil fatliquoring agent were added to the stirring tank and mixed evenly to obtain the impregnating solution;

[0040] 2) Preparation of coagulation liquid: Add 20 parts of coagulant sodium sulfate, 1.5 parts of cross-linking agent glutaraldehyde, 5 parts of formic acid with a mass concentration of 85%, and 50 parts of water into the stirring tank in order to make the coagulant Completely dissolve and mix uniformly to obtain coagulation solution;

[0041]3) Preparation of protein / nonwoven fabric composite: First, pass the nonwoven fabric through an impregnation tank filled with impregnation solution at 20~35°C, and then pass through a pair of rollers to squeeze out part of the impregnation solution in the nonwoven fabric to make the nonwoven fabric The content of the impregnating liquid in the woven fabri...

Embodiment 2

[0044] 1) Preparation of impregnation solution: Add 70 parts of water-soluble protein hydrolyzed gelatin with a solid content of 20% and 20 parts of anionic fatliquoring agent sulfited castor oil fatliquoring agent into the stirring tank and mix evenly according to parts by mass to obtain impregnation liquid;

[0045] 2) Preparation of coagulation liquid: Add 25 parts of coagulant ammonium sulfate, 3 parts of crosslinking agent modified glutaraldehyde, 6 parts of formic acid with a mass concentration of 85%, and 55 parts of water into the stirring tank in order by mass parts and stir to make The coagulant is completely dissolved, and the coagulation liquid is obtained after mixing evenly;

[0046] 3) Preparation of protein / nonwoven fabric composite: First, pass the nonwoven fabric through an impregnation tank filled with impregnation solution at 20~35°C, and then pass through a pair of rollers to squeeze out part of the impregnation solution in the nonwoven fabric to make the ...

Embodiment 3

[0049] 1) Preparation of impregnation solution: add 65 parts of water-soluble protein-modified gelatin with a solid content of 20% and 25 parts of anionic fatliquor sulfated rapeseed oil fatliquoring agent into the stirring tank in order by mass parts and mix evenly to obtain the impregnation solution ;

[0050] 2) Preparation of coagulation liquid: add 28 parts of coagulant sodium chloride, 2 parts of cross-linking agent glyoxal, 8 parts of formic acid with a mass concentration of 85%, and 60 parts of water into the stirring tank in order to make coagulation The agent is completely dissolved, and the coagulation liquid is obtained after mixing evenly;

[0051] 3) Preparation of protein / nonwoven fabric composite: First, pass the nonwoven fabric through an impregnation tank filled with impregnation solution at 20~35°C, and then pass through a pair of rollers to squeeze out part of the impregnation solution in the nonwoven fabric to make the nonwoven fabric The content of the i...

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PUM

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Abstract

The invention provides a production method of protein synthetic leather based on salt coagulation and solidification. The production method comprises the following steps that (1) an impregnating liquid is prepared, 60-85 parts of water soluble protein and 15-40 parts of anionic stuffing agent by mass are added into a stirring kettle for uniform mixing; (2) a coagulating liquid is prepared, 20-30 parts of coagulation agent, 1-3 parts of cross-linking agent, 3-8 parts of formic acid and 50-66 parts of water by mass are added into the stirring kettle for stirring and mixing; (3) a protein/nonwoven cloth complex is prepared; nonwoven cloth passes through an impregnating groove containing the impregnating liquid; the nonwoven cloth with the impregnating liquid passes through a coagulating groove with the coagulating liquid; and the post-treatment is conducted. According to the production method, a solvent DMF (dimethyl formamide) is not required in the whole production process; a production working environment is safe; the environmental pollution is not caused; and the produced protein synthetic leather has good physical and mechanical properties, breathability, moisture permeability, moisture absorption and removal properties and dyeing property.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, and in particular relates to a method for producing protein synthetic leather based on salt coagulation and solidification. 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 non-woven fabric is used to simulate the mesh layer, and microporous polyurethane coating is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. Widely used in making shoes, boots, bags and ball games. [0003] According to the data of the National Bureau of Statistics, in 2011, there were 495 artificial leather and synthetic leather enterprises above designated size (new classification standar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00C08L89/00C08L91/00
Inventor 马兴元张淑芳杨西萍
Owner SHAANXI UNIV OF SCI & TECH
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