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Manufacturing method of washable cow split leather

A production method and washable technology, which is applied in the directions of leather impregnation, leather drying, and leather surface mechanical treatment, can solve the problems of poor color fastness to washing and dimensional stability, high cost, and failure to achieve washable leather. To achieve the effect of ensuring color fastness to washing, environmental and human friendliness, and excellent washing resistance

Active Publication Date: 2019-11-05
漳州香洲皮革有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And existing washable leather, mostly pigskin, goatskin, there is seldom washable cow leather, and there is no relevant report on the preparation method of washable cow split leather.
[0003] The production process of general washable leather is: smoothing → grinding → degreasing → retanning → neutralization → dyeing → fatliquoring → retanning → color fixing → grinding → degreasing → neutralization → dyeing → fatliquoring → retanning → Color fixation requires multiple degreasing, fatliquoring, retanning and dyeing processes to improve the color fastness and water-based dimensional stability of the leather, thereby endowing the leather with better water resistance. The biggest disadvantage of this process is that the process is cumbersome , leading to the use of not only a wide variety of additives, but also a large amount of use and high cost
[0004] The color fastness and dimensional stability of water-resistant leather are closely related to the degree of protein fiber dispersion of the leather itself, the retanning and fatliquoring processes used in the leather production process, and the tanning agents and fatliquor used in each process. However, the color fastness to washing and the dimensional stability of the existing cow split leather are poor, and cannot reach the standard of washable leather

Method used

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  • Manufacturing method of washable cow split leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method for making water-resistant cow split leather comprises the following steps: taking the cow split leather which has been processed, squeezed and evenly shaved, and then subjected to rewetting → primary washing → retanning → neutralization → secondary washing →filling→dyeing→fatliquoring→acid-fixing→washing three times→fixing→washing four times→drying→hanging to dry→vibrating and softening→rubbing leather→breaking soft, the specific steps are as follows:

[0038] Step 1, re-humidification: take the skin base that has been processed, squeezed and evenly shaved, and put it in a drum for re-humidification to obtain a re-wet leather material. The specific re-humidity is: calculated according to the mass percentage of the skin Add 180% water, 0.5% PASTOSOL M2 degreaser, 0.3% moisture rehumidifier and 0.8% oxalic acid into the drum, adjust the pH to 3.8-4.0, and drain after running for 100 minutes, wherein the water temperature is 45°C;

[0039] Step 2, one-time washin...

Embodiment 2

[0051] The method for making water-resistant cow split leather comprises the following steps: taking the cow split leather which has been processed, squeezed and evenly shaved, and then subjected to rewetting → primary washing → retanning → neutralization → secondary washing →filling→dyeing→fatliquoring→acid-fixing→washing three times→fixing→washing four times→drying→hanging to dry→vibrating and softening→rubbing leather→breaking soft, the specific steps are as follows:

[0052] Step 1, re-humidification: take the skin base that has been processed, squeezed and evenly shaved, and place it in a drum for re-wetting to obtain a re-wet leather material. The specific re-humidity is: calculated according to the mass percentage of the skin base, Add 150% water, 0.4% PASTOSOL M2 degreaser, 0.2% moisture rehumidifier and 0.7% oxalic acid into the drum, adjust the pH to 3.8-4.0, drain after running for 90 minutes, wherein the water temperature is 45°C;

[0053] Step 2, one-time washing:...

Embodiment 3

[0065] The method for making water-resistant cow split leather comprises the following steps: taking the cow split leather which has been processed, squeezed and evenly shaved, and then subjected to rewetting → primary washing → retanning → neutralization → secondary washing →filling→dyeing→fatliquoring→acid-fixing→washing three times→fixing→washing four times→drying→hanging to dry→vibrating and softening→rubbing leather→breaking soft, the specific steps are as follows:

[0066] Step 1, re-humidification: take the skin base that has been processed, squeezed and evenly shaved, and place it in a drum for re-wetting to obtain a re-wet leather material. The specific re-humidity is: calculated according to the mass percentage of the skin base, Add 200% water, 0.6% PASTOSOL M2 degreaser, 0.4% moisture rehumidifier and 0.9% oxalic acid into the drum, adjust the pH to 3.8-4.0, drain after running for 120 minutes, wherein the water temperature is 40°C;

[0067] Step 2, one-time washing...

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Abstract

The invention relates to a method for manufacturing washable cow split leather and belongs to the technical field of manufacture of leather. The method comprises the following steps: taking a cow split leather blank subjected to wringing and shaving, and sequentially performing re-wetting, primary washing, retanning, neutralizing, secondary washing, filling, dyeing, stuffing, acid solidification, thrice washing, fixing, quartic washing, drying, hanging and airing, vibratory softening, leather fluffing and milling. The washable cow split leather manufactured by the method has favorable washability, and is high in leather yield.

Description

technical field [0001] The invention belongs to the technical field of leather production, and in particular relates to a production method of water-resistant cow split leather. Background technique [0002] The so-called washable leather refers to a kind of leather that can still meet the standard requirements of color fastness, dimensional stability and flexibility under certain washing conditions, so washable leather is a kind of high-grade leather that is easy to maintain. And existing washable leather, mostly pigskin, goatskin, there is very little washable cowhide, and there is no relevant report of the preparation method of washable cow split leather. [0003] The production process of general washable leather is: smoothing → grinding → degreasing → retanning → neutralization → dyeing → fatliquoring → retanning → color fixing → grinding → degreasing → neutralization → dyeing → fatliquoring → retanning → Color fixation requires multiple degreasing, fatliquoring, retan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C1/00C14C3/06C14C15/00C14C3/10C14C3/28C14C9/02C14B1/58C14B1/44
CPCC14B1/44C14B1/58C14C1/00C14C3/06C14C3/10C14C3/28C14C9/02C14C15/00
Inventor 许维奇
Owner 漳州香洲皮革有限公司
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