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Manufacturing method for chromium-free aldehyde-free tanned pigskin shoe lining leather

A manufacturing method, the technology of aldehyde tanned pigs, which is applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, chemical treatment before tanning, etc., which can solve scrapping and harmful consumption health issues

Inactive Publication Date: 2012-10-24
湖南省怀其皮革集团制革有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the finished product contains organophosphorus tanning agents, free formaldehyde will be continuously produced under the action of heating and sunlight for a long time after the finished shoes are processed, even the whole shoes are processed to completely scrapped. endanger the health of consumers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Deacidification: Take 100 parts of pickled naked pigskin and 100 parts of normal temperature water in parts by mass and add them to the drum, then add 8 parts of industrial salt to the drum and rotate for 30 minutes, add 0.4 parts of baking soda , 0.1 part of Pingpingjia and 0.15 part of disodium edetate rotate for 45 minutes;

[0017] 2) Main tanning: add 1 part of zirconium tanning agent to the drum and rotate for 180 minutes, add 0.1 part of baking soda and rotate for 30 minutes, add 2 parts of aluminum tanning agent and rotate for 90 minutes, then add 0.2 part of baking soda and rotate for 30 minutes, adjust After the pH value of the solution was 3.8, the temperature was raised to 40°C for 180 minutes, and the drum was stopped overnight;

[0018] 3) Neutralization: the next day, take out the drum and wash it with water. Add the washed pigskin into the drum, then add 200 parts of normal temperature water and 1 part of neutralized tannin into the drum and rotate fo...

Embodiment 2

[0022] 1) Deacidification: Take 100 parts of pickled naked pig skin and 100 parts of normal temperature water in parts by mass and add them to the drum, then add 10 parts of industrial salt to the drum and rotate for 30 minutes, add 0.2 parts of baking soda , 0.2 parts of Pingpingjia and 0.1 parts of disodium edetate rotate for 45 minutes;

[0023] 2) Main tanning: add 3 parts of zirconium tanning agent to the drum and rotate for 120 minutes, add 0.4 parts of baking soda and rotate for 30 minutes, add 3 parts of aluminum tanning agent and rotate for 90 minutes, then add 0.6 parts of baking soda and rotate for 30 minutes, adjust After the pH value of the solution was 3.8, the temperature was raised to 40°C for 180 minutes, and the drum was stopped overnight;

[0024] 3) Neutralization: The next day, take out the drum and wash it with water. Add the washed pigskin into the drum, then add 200 parts of normal temperature water and 3 parts of neutralized tannin into the drum and ro...

Embodiment 3

[0028] 1) Deacidification: Take 100 parts of pickled naked pigskin and 100 parts of normal temperature water in parts by mass and add them to the drum, then add 12 parts of industrial salt to the drum and rotate for 30 minutes, add 0.6 parts of baking soda , 0.3 parts of Pingpingjia and 0.3 parts of disodium edetate rotate for 45 minutes;

[0029] 2) Main tanning: add 2 parts of zirconium tanning agent to the drum and rotate for 140 minutes, add 0.5 parts of baking soda and rotate for 30 minutes, add 1.5 parts of aluminum tanning agent and rotate for 90 minutes, then add 0.4 parts of baking soda and rotate for 30 minutes, adjust After the pH value of the solution was 3.8, the temperature was raised to 40°C for 180 minutes, and the drum was stopped overnight;

[0030] 3) Neutralization: The next day, take out the drum and wash it with water. Add the washed pigskin into the drum, then add 200 parts of normal temperature water and 2 parts of neutralized tannin into the drum and r...

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PUM

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Abstract

The invention provides a manufacturing method for chromium-free aldehyde-free tanned pigskin shoe lining leather. The method comprises the following steps: placing bare pigskin in a rotary drum and then adding industrial salt, sodium bicarbonate, peregal and disodium ethylenediaminetetraacetate; then adding a zirconium tanning agent, sodium bicarbonate and an aluminum tanning agent into the rotary drum, heating an obtained mixture to a temperature of 40 DEG C, allowing the rotary drum to rotate for 180 min, stopping the rotary drum and standing the rotary drum overnight; in the next day, taking the pigskin out from the rotary drum, carrying out washing, adding the washed pigskin into the rotary drum, then adding water, neutralization tannin and sodium bicarbonate into the rotary drum again and draining off water; adding water, Tara powder, a penetrating agent, sulfited fish oil, sulfited rape oil and formic acid into the drained rotary drum, taking the pigskin out from the rotary drum and stacking and standing the pigskin; and carrying out toggling, milling, toggling, trimming, ironing, grading and measuring according to a conventional process so as to obtain the chromium-free aldehyde-free tanned pigskin shoe lining leather. According to the invention, through addition of disodium ethylenediaminetetraacetate as a masking agent, a pH value is reasonably adjusted, process balance that the surface of the zirconium tanning agent is not excessively tanned and the aluminum tanning agent is not easily eluted is achieved, and manufacturing of the chromium-free aldehyde-free tanned pigskin shoe lining leather is made possible.

Description

technical field [0001] The invention relates to a method for manufacturing pigskin shoe lining, in particular to a method for manufacturing chrome-free and formaldehyde-free tanned pigskin shoe lining. Background technique [0002] Pigskin shoe linings are an important type of genuine leather. The content of hexavalent chromium (Cr(VI)) and free formaldehyde is an important environmental protection technical index for pigskin shoe linings, which directly determines the quality of pigskin shoe linings. If the leather products contain Cr(VI) and free formaldehyde, it will cause harm to the human body. After entering 2010; most countries in the European Union have successively stipulated that after the heating and aging of shoe leather, the content of Cr(VI) after testing is less than 3mg / kg, and the free formaldehyde is less than 75mg / kg of leather. Cr(VI) in children's products and toy products VI) Can not be detected, free formaldehyde is less than 25mg / kg. [0003] The ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/02C14C1/00
Inventor 周燕超王瑞汪周星
Owner 湖南省怀其皮革集团制革有限公司
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