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Method for tanning sheepskin garment leather using non-chromium metal composite tanning agents

A non-chrome metal and compound tanning agent technology, which is applied in the field of chrome-free tanning of goat garment leather, can solve the problems that the shrinkage temperature of leather cannot be stabilized above 90°C, the strength is not good, and the gap is large, etc., and it can achieve industrial production in good factories Basic and matching effect

Inactive Publication Date: 2009-03-11
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three kinds of technologies have the following one or more problems in actual industrialized production engineering: the shrinkage temperature of leather cannot be stabilized above 90°C; the performance of leather is relatively different from that of chrome-tanned leather; Some leather processing technology systems; the elimination of chromium pollution brings pollution problems such as organic phosphorus and formaldehyde
[0004] In addition, chrome-tanned and common chrome-free tanned leathers often have problems of poor strength, insufficient whiteness or yellowing resistance when producing thin products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Acid enzyme softening: the pickled goatskin of conventional technology is squeezed and weighed, placed in the drum, and the weight of the skin is increased to 250%, and the weight of the material in the drum is 100 parts after the weight gain; 80 parts of normal temperature saline with a concentration of 6 Baume degrees, adjust the pH to 2.5, and rotate for 20 minutes; then add 0.05 parts of acid enzyme, and rotate for 240 minutes; add 0.8 parts of pretreatment agent AT-6, and rotate for 30 minutes;

[0048] (2) Tanning: add 6 parts of non-chrome metal compound tanning agents, 0.5 part of chrome-free tanning partner D5, and rotate for 180 minutes; add 0.3 part of sharp tanning agent GM-15, and rotate for 120 minutes; The pH is 3.6; finally add 100 parts of hot water at 60°C, keep the internal temperature at 36°C, and rotate for 60 minutes; overnight, wash out the drum with water the next day.

Embodiment 2

[0050] (1) Acid enzyme softening: the pickled goatskin of conventional technology is squeezed and weighed, placed in the drum, and the weight of the skin is increased to 250%, and the weight of the material in the drum is 100 parts after the weight gain; 80 parts of normal temperature saline with a concentration of 6 Baume degrees, adjust the pH to 2.5, and rotate for 20 minutes; then add 0.05 parts of acid enzyme, and rotate for 240 minutes; add 0.8 parts of pretreatment agent AT-6, and rotate for 30 minutes;

[0051](2) Tanning: add 10 parts of non-chrome metal compound tanning agents, 2.0 parts of chrome-free tanning partner D5, and rotate for 210 minutes; add 1.0 parts of sharp tanning agent GM-15, and rotate for 90 minutes; The pH is 3.7; finally add 120 parts of hot water at 60°C, keep the internal temperature at 37°C, and rotate for 60 minutes; overnight, wash out the drum with water the next day.

Embodiment 3

[0053] (1) Acid enzyme softening: the pickled goatskin of conventional technology is squeezed and weighed, placed in the drum, and the weight of the skin is increased to 250%, and the weight of the material in the drum is 100 parts after the weight gain; 80 parts of normal temperature saline with a concentration of 6 Baume degrees, adjust the pH to 2.5, and rotate for 20 minutes; then add 0.05 parts of acid enzyme, and rotate for 240 minutes; add 0.8 parts of pretreatment agent AT-6, and rotate for 30 minutes;

[0054] (2) Tanning: add 14 parts of non-chrome metal compound tanning agents, 3.5 parts of chrome-free tanning partner D5, and rotate for 240 minutes; add 1.8 parts of sharp tanning agent GM-15, and rotate for 60 minutes; The pH is 3.8; finally add 150 parts of hot water at 60°C, keep the internal temperature at 38°C, and rotate for 60 minutes; overnight, wash the drum out with water the next day.

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Abstract

The invention relates to a method for tanning ultrathin goat clothing leather by a chrome-free metal composite tanning agent. The method comprises the steps of acid enzyme bating and tanning; and in the tanning process, an LTA-100 type metal (chrome-free) composite tanning agent, a chrome-free tanning additive D5, a tanning promoting agent GM-15 and the like are adopted. The method is characterized in that leather in industrialized production has the thickness of between 0.4 and 0.6 millimeter and good strength; and the shrinkage temperature can reach over 90 DEG C; the leather has no pollution of chrome and phosphor, releases no formaldehyde, has rich coloration and is more suitable to be manufactured into white leather than chrome tanning leather; and sludge for manufacturing leather can be directly incinerated and has no potential danger of hexavalent chrome. The method can substitute the tanning of the prior chrome powder to the leather and remove the pollution of production process and chrome salt in waste of a leather product to human and environment simultaneously, thereby creating a new approach for producing the chrome-free tanning leather and the clothing leather in a tannery.

Description

technical field [0001] The invention belongs to the field of leather tanning, in particular to a chrome-free tanning technology of goat clothing leather. Background technique [0002] Chrome tanning, which has a history of more than 100 years, has been the mainstream technology of leather tanning because it can impart excellent performance to leather, and it is almost unshakable. Chromium in the tanning industry has pollution problems to the environment, and its sources are three aspects: first, pollution in the production and processing of chromium-containing materials; second, pollution in sewage, sludge, and chromium-containing solid waste in the tanning production process; Third, secondary pollution to the environment after consumption of chromium-containing products. This pollution is often ignored by people, but it accounts for about 70% of the total chromium pollution in the whole leather industry, and it is quite scattered, which is not conducive to treatment or rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/02
Inventor 兰云军周建飞刘建国邹祥龙
Owner WENZHOU UNIVERSITY
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