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A method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid waste

A solid waste, high moisture absorption technology, applied in the field of high moisture absorption and moisture permeability regenerated leather, to reduce pollution, improve quality advantages, and expand the scope of application

Active Publication Date: 2022-05-03
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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PUM

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Abstract

The invention discloses a method for preparing regenerated leather with high moisture absorption and moisture permeability from tanning solid waste, which belongs to the technical field of regenerated leather preparation, and comprises the following steps: selecting leather waste from tanning solid waste for standby; Grinding and pulverizing leather waste to obtain leather powder, adding water to the leather powder to obtain a leather-water mixed solution; adding adhesives, coagulants, and additives to the leather-water mixed solution, and mixing evenly to obtain a mixed slurry; compressing the mixed slurry After molding, it can be made into high moisture absorption and moisture permeability regenerated leather after drying. The invention makes full use of the leather solid waste produced in the tanning process to regenerate and synthesize leather products, improves the economic efficiency in the tanning process, reduces the pollution of the leather waste to the environment, and realizes the high efficiency of the tanning solid waste use.

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 Patents(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