Blue wet cow leather dechroming/softening processing method

A technology of softening and cowhide, which is applied in the field of dechrome softening of wet blue cowhide, can solve the problems of soft and comfortable leather products, hard leather blanks, etc., and achieve obvious economic and social benefits, full leather body, Strong three-dimensional effect of skin texture
CN103789463AInactive Publication Date: 2014-05-14HUNAN LEAD LEATHER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN LEAD LEATHER
Publication Date
2014-05-14
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention provides a blue wet cow leather dechroming softening processing method which comprises steps of rewetting, washing, basifying, detanning, dealkalizing, softening and the like. According to the blue wet cow leather dechroming softening processing method provided by the invention, a comprehensive technique that acid, alkali and enzyme are combined is adopted for dechroming and softening, so that damage to human bodies caused by Cr<6+> is avoided; when and after the blue wet cow leather is subjected to dechroming, the leather fibers are loosened under the action of alkali and softening emzyme, and the purpose of softening the leather is achieved. After the blue wet cow leather is subjected to dechroming and softening, normal later processing procedures can be performed according to requirements of products. The leather processed by using the method is particularly applicable to manufacturing of environment-friendly chromium-free instep leather, sofa leather, natural leather and the like.
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Description

technical field

[0001] The invention relates to the post-treatment technology of cowhide, in particular to a method for dechroming and softening wet blue cowhide. Background technique

[0002] At present, China has become a world-recognized leather production and processing power. However, my country's cowhide resources are limited, and leather companies need to import a large amount of cowhide from Africa and other places every year. Due to factors such as transportation costs and sanitation and epidemic prevention, the imported cowhide is not raw leather, but wet blue cowhide after preliminary processing. Wet blue cowhide has the following disadvantages:

[0003] 1. Wet blue cowhide contains chromium. Wet blue cowhide is a semi-finished leather product made by chrome tanning, in which trivalent chromium will be converted into hexavalent chromium due to adverse factors such as processing or storage, and Cr 6+ Is a serious carcinogen. In order to protect the life, healt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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