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Method for tanning sheep boot-shoe leather using non-chromium metal composite tanning agent

A non-chrome metal and compound tanning agent technology, applied in the field of chrome-free tanning of sheep boot leather, can solve the problems that the shrinkage temperature of leather cannot be stabilized above 90°C, poor processability, organic phosphorus pollution, etc., and achieve good factory industrialization Good production base and matching effects

Inactive Publication Date: 2009-02-25
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three technologies have one or more of the following problems in the actual industrial production engineering: the shrinkage temperature of leather cannot be stabilized above 90°C; the performance of leather is far behind that of chrome tanned leather; Some leather processing technology systems; the elimination of chromium pollution has brought pollution problems such as organic phosphorus and formaldehyde

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Organic aldehyde pre-tanning: conventional shaved and pickled sheepskin is weighed, placed in the drum, the weight of the skin is increased to 250%, and the weight of the material in the drum is 100 parts; 50 parts of normal temperature brine at 8 degrees Baume, deacidified to pH 4.0, and rotated for 20 minutes; then added 0.5 part of organic aldehyde tanning agent and 0.2 part of non-ionic oil, and rotated for 60 minutes;

[0037] (2) Tanning: add 7 parts of non-chrome metal compound tanning agent, 3.0 parts of chrome-free tanning partner D5, and rotate for 60 minutes; add 1.2 parts of sharp tanning agent GM-15, and rotate for 180 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 2

[0039] (1) Organic aldehyde pre-tanning: conventional shaved and pickled sheepskin is weighed, placed in the drum, the weight of the skin is increased to 280%, and the weight of the material in the drum is 100 parts; 65 parts of normal temperature brine of 9 Baume degrees, deacidified to pH 4.1, and rotated for 25 minutes; then added 1.2 parts of organic aldehyde tanning agent and 0.6 part of non-ionic oil, and rotated for 120 minutes;

[0040] (2) Tanning: add 7 parts of non-chrome metal compound tanning agent, 3.0 parts of chrome-free tanning partner D5, and rotate for 60 minutes; add 1.2 parts of sharp tanning agent GM-15, and rotate for 180 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

[0042] (1) Organic aldehyde pre-tanning: conventionally shaved and pickled sheepskin is weighed, placed in the drum, the weight of the skin is increased to 300%, and the weight of the material in the drum is 100 parts; 80 parts of normal temperature brine of 10 degrees Baume, deacidified to pH 4.2, and rotated for 30 minutes; then added 2.0 parts of organic aldehyde tanning agent and 1.0 part of non-ionic oil, and rotated for 180 minutes;

[0043] (2) Tanning: add 7 parts of non-chrome metal compound tanning agent, 3.0 parts of chrome-free tanning partner D5, and rotate for 60 minutes; add 1.2 parts of sharp tanning agent GM-15, and rotate for 180 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.

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Abstract

The invention relates to a method of tanning sheep boot leather with non-chrome metal compound tanning agent, comprising steps of pre-tanning of organic aldehyde and tanning. LTA-100 metal (chrome-free) compound tanning agent, chrome-free tanning partner D5, tanning assisting agent GM-15 and the like are adopted during the process of tanning. The invention is characterized in that: the shrinkage temperature of leather in industrialized production can be above 90 DEG C; chrome pollution and phosphorus pollution are not produced, and formaldehyde is not released; whiling dyeing, the leathers have rich colors so that the leathers are better for white and light leathers rather than the chrome tanning leathers; the tannery sludge can be directly burned without causing potential danger of hexavalent chrome; due to the good compatibility with the existing tanning technology, a special adjustment to the after-tanning technology and materials is not necessary. The invention can be used for substituting the traditional technique of leather tanning by chrome powder, meanwhile removing pollution to human and environment by chromium salts during the process and in the wastes of leather products, thus creating a new way to produce chrome-free tanning leather for tanneries.

Description

technical field [0001] The invention belongs to the field of leather tanning, in particular to a chrome-free tanning technology for sheep boot 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 pollution in the tanning industry has three sources: 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 recovery. With the development of the global economy ...

Claims

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Application Information

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IPC IPC(8): C14C3/02
Inventor 兰云军周建飞刘建国罗卫平
Owner WENZHOU UNIVERSITY
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