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Environment-friendly tanning method and device of leather

An environmentally friendly, tanning technology, applied in leather manufacturing, leather punching/punching/cutting, small raw hide/large raw hide/leather/fur treatment, etc., can solve the problems of long time consumption, complicated processing equipment, and high cost of tanning methods , to achieve the effect of ensuring sealing performance, improving tanning speed and simple structure

Inactive Publication Date: 2020-06-19
ZHONGNIU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above problems, and to design an environmentally friendly leather tanning method and device, which solves the problems in the prior art that the cost of the tanning method is relatively high, the processing equipment is relatively complicated, and it takes a long time

Method used

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  • Environment-friendly tanning method and device of leather
  • Environment-friendly tanning method and device of leather
  • Environment-friendly tanning method and device of leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: in concrete implementation process, carry out leather tanning work according to following steps, comprise following operation steps:

[0040] Step S1, raw material pretreatment: the dried animal skin is soaked in water, fleshed out, degreased, depilated, sliced, pickled and softened to obtain raw hide;

[0041] Step S2, tanning treatment: put the raw hide obtained in step S1 into a tanning device, add water and a vegetable tanning agent, and soak for 5 hours. Based on the quality of the raw hide, add 2 parts of water, add 5% of the vegetable tanning agent, and add sulfuric acid Ammonium 1%, sodium chloride 8%, rotate for 2 hours, during the tanning process, maintain the temperature at 29 ° C, and obtain preliminary tanned leather. The vegetable tanning agent is composed of polyphenol derivatives with a complex structure. The amide groups of the collagen peptide chains are combined by hydrogen bonds to form multi-point cross-links for tanning. Vegetable tan...

Embodiment 2

[0044] Embodiment 2: in concrete implementation process, carry out leather tanning work according to following steps, comprise following operation steps:

[0045] Step S1, raw material pretreatment: the dried animal skin is soaked in water, fleshed out, degreased, depilated, sliced, pickled and softened to obtain raw hide;

[0046] Step S2, tanning treatment: put the raw hide obtained in step S1 into a tanning device, add water and a vegetable tanning agent, and soak for 6 hours. Based on the quality of the raw hide, add 2 parts of water, add 6% of the vegetable tanning agent, and add sulfuric acid Ammonium 1.5%, sodium chloride 10%, rotate for 3 hours, during the tanning process, maintain the temperature at 29 ° C, and obtain preliminary tanned leather. The vegetable tanning agent is composed of polyphenol derivatives with complex structure. The amide groups of the collagen peptide chains are combined by hydrogen bonds to form multi-point cross-links for tanning. Vegetable ta...

Embodiment 3

[0049] Embodiment 3: in concrete implementation process, carry out leather tanning work according to following steps, comprise following operation steps:

[0050] Step S1, raw material pretreatment: the dried animal skin is soaked in water, fleshed out, degreased, depilated, sliced, pickled and softened to obtain raw hide;

[0051] Step S2, tanning treatment: put the raw hide obtained in step S1 into a tanning device, add water and a vegetable tanning agent, and soak for 5.5 hours. Based on the quality of the raw hide, add 1.5 parts of water, add 5.5% of the vegetable tanning agent, and add sulfuric acid Ammonium 1.2%, sodium chloride 9%, rotate for 2.5 hours, during the tanning process, maintain the temperature at 29 ° C, and obtain preliminary tanned leather. The vegetable tanning agent is composed of polyphenol derivatives with a complex structure. The amide groups of the collagen peptide chains are combined by hydrogen bonds to form multi-point cross-links for tanning. Veg...

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Abstract

The invention discloses an environment-friendly tanning method and device of leather. The method comprises the following steps of S1, raw material pretreatment; S2, tanning treatment; S3, rinsing andneutralizing; and fourthly, finishing treatment. The environment-friendly tanning device of the leather comprises a base, a fixed frame and a rotating cylinder. The fixed frame is mounted on the base,the rotating cylinder is mounted on the fixed frame and is rotatably connected with the two ends of the fixed frame, a waste water recycling bin is mounted below the base and communicates with the base, an existing leather tanning method is improved, temperature and PH value in the raw leather tanning process can be adjusted, the tanning speed is improved, in the whole tanning process, a plant tanning agent, ammonium sulfate and sodium chloride serve as main components of tanning liquid, neutralizing is carried out through sodium bicarbonate, waste water treatment is easy, and the whole process is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to an environment-friendly leather tanning method and device. Background technique [0002] Leather tanning is to use tannin to chemically and physically process the protein in the skin. It uses a series of processes and some chemical agents to make a series of changes in the protein in the raw hide of cattle, pigs, sheep and other animals, making collagen Denaturation occurs. The tanned leather is soft, strong, wear-resistant and not easy to spoil, so the tanned leather can be used to make various leather daily necessities; according to the composition of the tanning agent, the tanning agent can be divided into chrome tanning agent , zirconium tanning agent, aluminum tanning agent and other heavy metal tanning agents, biomass tanning agents represented by modified protein tanning agents, amino acid tanning agents, etc., vegetable acid tanning agents represented by veget...

Claims

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Application Information

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IPC IPC(8): C14B1/02C14C1/04C14C1/06C14C1/08C14C3/28C14B5/00
CPCC14B1/02C14B5/00C14C1/04C14C1/06C14C1/08C14C3/28
Inventor 范徐辉祝雷光范恩源
Owner ZHONGNIU GRP
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