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Tanning method combining sulfones synthetic tanning agent and nano silicate

A nano-silicate technology combined with tanning methods, which can be used in small hide/big hide/leather/fur treatment, tanning treatment, small hide/big hide/leather skin/fur chemical treatment, etc. It can solve the problem of shrinkage temperature Improve non-contribution and other issues to achieve the effect of obvious effect, good light resistance and good biodegradability

Inactive Publication Date: 2016-08-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, previous experiments have shown that tanning alone has almost no contribution to the increase in shrinkage temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add the pickled leather into the drum at room temperature, the mass ratio of the bath liquid to the pickled leather is 1:1, add 8% sodium chloride, turn for 30min, then add 2% sodium bicarbonate, adjust the bath liquid to pH 4.5, then rotate for 30 minutes; add 5% sulfone syntans, continue to rotate for 4 hours, let it stand overnight, turn for 30 minutes the next day, wash with water, and get wet white leather. Add 100% water to the above wet white skin, then add 4% nano-silicate, continue to rotate for 3 hours, add 2% formic acid, adjust the bath liquid to pH 3.0, let stand overnight, turn for 30 minutes the next day, and wash with water , ride a horse and let it stand still to get the crust leather.

Embodiment 2

[0020] Add the pickled leather into the drum at room temperature, the mass ratio of the bath liquid to the pickled leather is 1:1, add 8% sodium chloride, turn for 30min, then add 2% sodium bicarbonate, adjust the bath liquid to pH 4.5, then rotate for 30 minutes; add 10% sulfone syntans, continue to rotate for 4 hours, let it stand overnight, turn for 30 minutes the next day, wash with water, and get wet white leather. Add 100% water to the above wet white skin, then add 2% nano-silicate, continue to rotate for 3 hours, add 2% formic acid, adjust the bath liquid to pH 3.0, let it stand overnight, turn it for 30 minutes the next day, and wash it with water , ride a horse and let it stand still to get the crust leather.

Embodiment 3

[0022] Add the pickled leather into the drum at room temperature, the mass ratio of the bath liquid to the pickled leather is 1:1, add 8% sodium chloride, turn for 30min, then add 2% sodium bicarbonate, adjust the bath liquid to pH 4.5, then rotate for 30 minutes; add 10% sulfone syntans, continue to rotate for 4 hours, let it stand overnight, turn for 30 minutes the next day, wash with water, and get wet white leather. Add 100% water to the above wet white skin, then add 3% nano-silicate, continue to rotate for 3 hours, add 2% formic acid, adjust the bath liquid to pH 3.0, let it stand overnight, turn it for 30 minutes the next day, and wash it with water , ride a horse and let it stand still to get the crust leather.

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Abstract

The invention discloses a tanning method combining a sulfones synthetic tanning agent and nano silicate. Firstly, pickled leather is added into a rotary drum under the condition of room temperature, the mass ratio of a bath solution to the pickled leather is (0.5-1):1, sodium bicarbonate is added to adjust the pH of the bath solution to 4.0-4.5, rotation is carried out for 30 min, 2%-15% of the sulfones synthetic tanning agent is added, rotation continues for 2-6 h, standing is carried out overnight, rotation is carried out for 30 min the next day, the picked leather is washed with water, and white wet leather is obtained; 100% of water is added into the white wet leather, then 0.5%-6% of the nano silicate is added, rotation continues for 4-8 h, formic acid is added to adjust the pH of the bath solution to 2.5-3.0, standing is carried out overnight, and washing with water is carried out. The shrinkage temperature of crust leather obtained through the tanning method can reach 85 DEG C or above, the body of finished leather is light white, good in light resistance and remarkable in filling and thickening effect, and post-tanning waste liquid has good biodegradability. In addition, the nano performance like UV resistance can be given to the finished leather due to introduction of the nano silicate.

Description

technical field [0001] The invention relates to a sulfone synthetic tanning agent-nano silicate combined tanning method. Specifically, it belongs to the application of non-metal chrome-free tanning agent in clean leather-making technology. Background technique [0002] In recent years, with the enhancement of people's awareness of ecological and environmental protection, the sustainable development of the leather industry has been challenged unprecedentedly. In particular, the increasingly stringent requirements for the control of chromium pollution produced in the tanning process and the limit of hexavalent chromium in leather products have made the use of chrome tanning agents controversial. Therefore, the research and development of chrome tanning based on environmentally friendly materials has gradually become the main way to solve the problem of environmental pollution in traditional chrome tanning methods. Among them, the wet white leather tanning method using non-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/28C14C3/04C14C3/08
CPCC14C3/28C14C3/04C14C3/08
Inventor 林炜石佳博李晓鹏王春华赵昕宇
Owner SICHUAN UNIV