Processing technology of cowhide leather

A processing technology and cowhide technology, which is applied in leather drying, leather manufacturing, small raw hide/large raw hide/leather/fur treatment, etc., can solve the problems of reduced leather quality, difficult tanning, hard leather feel, etc., and achieves improved stability and Chemical resistance, non-perishable, comfortable and soft to the touch

Inactive Publication Date: 2018-03-30
ANHUI DINGHENG LEATHER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the deep processing of cowhide, many traditional methods cannot effectively remove the residual fat on the cowhide for the degreasing of cowhide, and it is not easy to carry out subsequent processing such as tanning. Deterioration reduces the quality of the leather, and the leather is hard and feels poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of processing technique of cowhide leather that the present invention proposes, comprises the following steps:

[0025] 1) Cleaning: Clean the fresh cowhide, remove the meat under the skin, soak it in salt water, take it out and dry it to get the salted cowhide, set aside;

[0026] 2) Degreasing: washing salted cowhide with water, filtering, adding to a degreasing tank equipped with a degreasing agent for degreasing treatment; the degreasing agent includes the following raw materials: degreasing enzyme, polyvinylpyrrolidone, Tween-80, water;

[0027] 3) depilation: depilation is carried out to the cowhide after the degreasing treatment;

[0028] 4) Alkali dipping: put the cowhide into the drum, add lye, and the lye includes the following raw materials in mass percent: 1% Na 2 S, 2% Ca(OH) 2 , 1% NaOH, and water balance, set to rotate for 0.5h and stop for 3h, discard the liquid after 24h, and clean it with running water;

[0029] 5) Deliming: Use 3% (NH 4 ) ...

Embodiment 2

[0034] A kind of processing technique of cowhide leather that the present invention proposes, comprises the following steps:

[0035] 1) Cleaning: Clean the fresh cowhide, remove the meat under the skin, soak it in 5% salt water, take it out and dry it to get the salted cowhide, which is set aside;

[0036] 2) Degreasing: Wash the salt cowhide with water at 40°C for 20 minutes, filter, add to a degreasing tank equipped with a degreasing agent, stir for 40 minutes, let it stand overnight, and wash it with running water; the degreasing agent includes the following raw materials in mass percentage : Delipase 6%, polyvinylpyrrolidone 3%, Tween-80 3%, water balance;

[0037] 3) Depilation: Utilize rosin solution to depilate the degreased cowhide;

[0038] 4) Alkali soaking: put cowhide into the drum, add lye, the mass volume ratio of cowhide and lye is 1g:1mL, and the lye includes the following raw materials in mass percent: 1%Na 2 S, 2% Ca(OH) 2 , 1% NaOH, and water balance, se...

Embodiment 3

[0044] A kind of processing technique of cowhide leather that the present invention proposes, comprises the following steps:

[0045] 1) Cleaning: Clean the fresh cowhide, remove the meat under the skin, soak it in 8% salt water, take it out and dry it to get the salted cowhide, which is set aside;

[0046] 2) Degreasing: wash the salt cowhide with water at 45°C for 25 minutes, filter, add to a degreasing tank equipped with a degreasing agent, stir for 50 minutes, let it stand overnight, and wash it with running water; the degreasing agent includes the following raw materials in mass percentage : Delipase 8%, polyvinylpyrrolidone 6%, Tween-80 5%, water balance;

[0047] 3) Depilation: Utilize rosin solution to depilate the degreased cowhide;

[0048] 4) Alkali soaking: put cowhide into the drum, add lye, the mass volume ratio of cowhide and lye is 1g: 1.5mL, and the lye includes the following raw materials in mass percent: 1% Na 2 S, 2% Ca(OH) 2 , 1% NaOH, and water balance...

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PUM

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Abstract

The invention discloses a processing technology of cowhide leather. The technology comprises the steps of: cleaning, degreasing, hair removal, alkali dipping, deashing, softening, acid dipping and tanning. According to the invention, the ester removal agent used in degreasing treatment can remove the residual ester well, is beneficial to intracutaneous penetration of tanning agent molecules and combination with collagen molecule active groups in a follow-up tanning process, formation of a cross-linked protein fiber three-dimensional network, and improvement of the stability and chemical resistance, and the prepared leather does not rot or deteriorate easily. Through the treatment of alkali dipping, deashing, softening and other steps, mesenchymal protein fiber in cortex can be dissolved, the softness of finished leather can be improved, and the handfeel is comfortable.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a processing technology of cowhide leather. Background technique [0002] my country's cattle breeding industry is well developed, especially beef cattle breeding, which has a short breeding cycle and high economic benefits. With the development of cattle breeding industry, a series of cattle breeding deep processing industries are also booming. Cowhide is an important part of cattle breeding deep processing. After deep processing, cowhide It is widely used in clothing, shoes and hats, text carriers, medical treatment, packaging and other fields. [0003] In the deep processing of cowhide, many traditional methods cannot effectively remove the residual fat on the cowhide for the degreasing of cowhide, and it is not easy to carry out subsequent processing such as tanning. Deterioration reduces the quality of the leather, and the leather is hard and feels poor. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14B1/00C14C15/00C14C1/08C14C1/06C14C1/00C14C3/02C14B1/58C14C3/06
CPCC14B1/00C14B1/58C14C1/00C14C1/06C14C1/08C14C3/02C14C3/06C14C15/00
Inventor 刘严裕
Owner ANHUI DINGHENG LEATHER PROD
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