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A fur retanning process for preventing leather from discoloration

A technology of leather and discoloration, which is applied in the field of fur retanning technology, can solve the problems of discoloration of finished leather, limit the quality and burden of high-quality leather products, and achieve the effect of clear grain pattern, improvement of discoloration and fine grain surface

Active Publication Date: 2020-12-22
嘉兴宏远汽车座椅股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The retanning process of the above patents and existing technologies, the retanning agents containing heavy metals used in large quantities will bring a very heavy burden to the environment, and the finished leather will have discoloration to varying degrees, which limits the high quality. Further improvement in the quality of leather products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A fur retanning process for preventing leather discoloration, the preparation technical scheme is as follows:

[0019] Remove water from the leather with less damage and no pollution, and then shave it evenly to keep the thickness of the leather at 1.2mm. Then, according to the mass fraction, add 110 parts of leather and 240 parts of water into the drum to control the amount of water in the drum. The temperature is 35°C, add 1.2 parts of acid protease and 1.2 parts of polyethoxylated fatty alcohol, adjust the pH value of the solution to 3.5 with organic acid, rotate the drum at a speed of 8 rpm, and stop after 270 min; then Drain the water, re-add 180 parts of water and 1 part of dye, and after rotating for 15 minutes, add 5 parts of glyoxal, 0.5 parts of Tween 80, 3.5 parts of protein filler and 5 parts of boron-containing anti-fading complex The tanning agent is dissolved evenly after turning for 15 minutes, then the pH value of the solution is adjusted to 3.5 with or...

Embodiment 2

[0027] A fur retanning process for preventing leather discoloration, the preparation technical scheme is as follows:

[0028] Remove water from the leather with less damage and no pollution, and then shave it evenly to keep the thickness of the leather at 0.8mm. Then, according to the mass fraction, add 100 parts of leather and 200 parts of water into the drum to control the amount of water in the drum. The temperature is 30°C, add 0.6 parts of acid protease and 0.5 parts of polyethoxylated fatty alcohol, adjust the pH value of the solution to 2 with organic acid, rotate the drum at a speed of 5 rpm, and stop after 240 min; then Drain the water, re-add 150 parts of water and 0.5 parts of dye, rotate for 10 minutes, add 2 parts of glyoxal, 0.3 parts of Tween 80, 1.5 parts of protein filler and 3 parts of boron-containing anti-fading compound The tanning agent is dissolved evenly after turning for 10 minutes, then the pH value of the solution is adjusted to 3 with organic acid, ...

Embodiment 3

[0036] A fur retanning process for preventing leather discoloration, the preparation technical scheme is as follows:

[0037]Remove water from the leather with less damage and no pollution, and then shave it evenly to keep the thickness of the leather at 1.5mm. Then, according to the mass fraction, add 120 parts of leather and 300 parts of water into the drum to control the amount of water in the drum. The temperature is 40°C, add 1.8 parts of acid protease and 1.4 parts of polyethoxylated fatty alcohol, adjust the pH value of the solution to 5.5 with organic acid, rotate the drum at a speed of 10 rpm, and stop after 300 min; then Drain the water, re-add 200 parts of water and 1.5 parts of dye, rotate for 20 minutes, add 8 parts of glyoxal, 0.8 parts of Tween 80, 5 parts of protein filler and 8 parts of boron-containing anti-fading complex The tanning agent is dissolved evenly after turning for 20 minutes, then the pH value of the solution is adjusted to 4 with an organic acid...

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Abstract

The invention relates to the field of leather processing, in particular to a fur retanning technology for preventing leather fading. Pollution-free leather with few defects is subjected to water removal treatment; by mass percent, 100-120 parts of leather and 200-300 parts of water are added in a drum, 0.6-1.8 parts of acid proteinase and 0.5-1.4 parts of polyethoxylated fatty alcohols are added,organic acid is used for adjusting the solution pH value to 2-5.5, and 150-200 parts of water and 0.5-1.5 parts of dye are added; and after rotation is conducted for 10-20 min, 2-8 parts of glyoxal, 0.3-0.8 part of tween 80, 1.5-5 parts of protein filler and 3-8 parts of a boron-containing fading preventing retanning agent are added, uniform dissolving is conducted after rotation is conducted for10-20 min, the temperature is controlled to range from 40 DEG C to 50 DEG C, and after rotation is conducted for 80-120 min and water is drained, the retanning procedure can be finished.

Description

technical field [0001] The invention relates to the field of leather processing, in particular to a fur retanning process for preventing leather from fading. Background technique [0002] Retanning is very critical in modern tanning technology, especially for light leather, its importance is obvious, and retanning is almost an indispensable process. Through retanning, the softness, smoothness and fineness of the grain surface, wear resistance, formability, fullness, etc. of the finished leather can be improved, and the style of the finished leather can also be controlled through retanning. [0003] CN103509887A discloses a nanocomposite-chrome powder combined retanning process for two-layer cowhide suede. In order to improve the strength of suede leather, the traditional chrome retanning process of suede needs to add 10%-15% chromium powder, resulting in the content of chromium trioxide in the chrome retanning waste liquid at 3000-5000mg / L, a large amount The chromium reta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/08C14C3/22C14C1/00D06P3/30D06P3/32
CPCC14C1/00C14C3/08C14C3/22D06P3/30D06P3/32
Inventor 张玲王新
Owner 嘉兴宏远汽车座椅股份有限公司
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