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Method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid wastes

A solid waste, high moisture absorption technology, applied in the field of high moisture absorption and moisture permeability regenerated leather, to achieve the effect of improving quality advantages, reducing pollution, and expanding the scope of application

Active Publication Date: 2020-05-19
SHAANXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Regenerated leather is a whole piece of leather prepared by processing the scraps of leather. However, the moisture absorption and moisture permeability of regenerated leather prepared by traditional preparation methods still has a certain gap with genuine leather. In order to better prepare There is an urgent need to optimize the preparation process of recycled leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid waste, the steps are as follows:

[0020] S1. First screen the tanning solid waste to remove impurities such as metals, rubber, plastics, sediment, and stones in the leather waste.

[0021] S2. Grinding and pulverizing the selected leather waste, soaking in water to make it soften, the mass concentration of leather powder in the leather-water mixed solution is 2%.

[0022] S3. Select natural rubber latex as the adhesive, and the dosage is 50% of the leather powder quality in step S2. Select cationic polyacrylamide as the coagulant, and the dosage is 0.7% of the adhesive quality. Select the rubber extract additive, the dosage 8% of the mass of the leather powder in step S2, add adhesive, coagulant, and additives to the leather-water mixed solution in step S2, and mix evenly to obtain a mixed slurry.

[0023] S4. The mixed pulp is compressed and molded by...

Embodiment 2

[0025] A method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid waste, the steps are as follows:

[0026] S1. First screen the tanning solid waste to remove impurities such as metals, rubber, plastics, sediment, and stones in the leather waste.

[0027] S2. Grinding and pulverizing the selected leather waste, soaking in water to make it soften, the mass concentration of leather powder in the leather-water mixed solution is 3%.

[0028] S3. Select natural rubber latex as the adhesive, and the dosage is 40% of the leather powder quality in step S2. Select cationic polyacrylamide as the coagulant, and the dosage is 0.6% of the adhesive quality. Select the rubber extract additive, the dosage 10% of the mass of the leather powder in step S2, the adhesive, coagulant, and additives are added to the leather-water mixed solution in step S2, and mixed evenly to obtain a mixed slurry.

[0029] S4. The mixed slurry in step S3 i...

Embodiment 3

[0031] A method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid waste, the steps are as follows:

[0032] S1. First screen the tanning solid waste to remove impurities such as metals, rubber, plastics, sediment, and stones in the leather waste.

[0033] S2. Grinding and pulverizing the selected leather waste, soaking in water to make it soften, the mass concentration of the leather-water mixed solution is 2%.

[0034] S3. Select natural rubber latex as the adhesive, and the dosage is 60% of the leather powder quality in step S2. Select cationic polyacrylamide as the coagulant, and the dosage is 0.8% of the adhesive quality. Select the rubber extract additive, the dosage 7% of the mass of the leather powder in step S2, add adhesive, coagulant, and additives to the leather-water mixed solution in step S2, and mix evenly to obtain a mixed slurry.

[0035] S4. The mixed slurry in step S3 is compressed and molded, and th...

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Abstract

The invention discloses a method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid wastes, and belongs to the technical field of regeneratedleather preparation. The method comprises the following steps: selecting leather scraps from the tanning solid wastes for later use; grinding and crushing the selected leather scraps to obtain leatherpowder, and adding water into the leather powder to obtain a leather water mixed solution; adding an adhesive, a flocculation agent and an additive into the leather water mixed solution, and uniformly mixing to obtain mixed slurry; and carrying out compression molding on the mixed slurry, and drying to obtain the regenerated leather with high moisture absorption and moisture permeability. According to the method, the leather solid wastes generated in the leather making process is fully utilized to regenerate and synthesize leather products, the economic efficiency in the leather making process is improved, the pollution of the leather wastes to the environment is reduced, and efficient utilization of the leather making solid wastes is achieved.

Description

technical field [0001] The invention relates to the technical field of regenerated leather preparation, in particular to a method for regenerated leather with high moisture absorption and moisture permeability prepared from tanning solid waste. Background technique [0002] my country's tanning industry is developing rapidly. Although the output of leather is large, the utilization rate of leather in the domestic tanning industry is far behind other developed countries in the world. Therefore, my country has become the country that produces the most solid waste in the tanning industry. The annual solid waste Waste production amounts to millions of tons. These solid wastes are mainly wet-blue leather scraps and sanding shavings, the main component of which is collagen. If these wastes are randomly piled up, they will cause organic matter to rot, leading to environmental pollution and serious waste of resources. For the rational use of resources and the improvement of environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08L7/02C08L33/26C08K5/1545
CPCC08L89/00C08L2205/03C08L7/02C08L33/26C08K5/1545
Inventor 强涛涛李荻蒲亚东王乐智
Owner SHAANXI UNIV OF SCI & TECH