Fur tanning method based on bio-based epoxy active tanning agent

A bio-based, tanning technology, applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, chemical treatment before tanning, etc. It can solve the problems of formaldehyde residue and pollution
CN113234868AActive Publication Date: 2021-08-10NINGXIA WUZHONG JINGYI FUR PROD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGXIA WUZHONG JINGYI FUR PROD
Publication Date
2021-08-10

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Abstract

The invention provides a fur tanning method based on a bio-based epoxy active tanning agent, the method comprises the processes of softening, pickling and tanning, or comprises the processes of softening and tanning, and comprises the following steps: (1) putting pretreated fur into softening liquid in a paddle-tumbler for softening; after softening, pickling and then tanning, or directly tanning after softening; (2) pickling: adding organic acid and inorganic acid into the softening liquid in the paddle-tumbler to form pickling liquid for pickling; and (3) adjusting the pH value of the pickled or softened bath liquid to 2.0-5.0, adding a tanning aid and a bio-based epoxy active tanning agent, paddling a paddle for 20-40 minutes, then intermittently paddling for 6-8 hours, standing for 12-15 hours, adding a basifier into the bath liquid to extract alkali, adjusting the temperature of the bath liquid to 35-50 DEG C, intermittently paddling for 2-3 hours, standing for 12-15 hours, and discharging the fur. According to the method, the problems of chromium and formaldehyde residues and pollution existing in an existing fur tanning method can be solved, and the quality of the fur plate and the fur quilt of the tanned fur can be improved.
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Description

technical field

[0001] The invention belongs to the field of fur tanning processing, and relates to a fur tanning method based on a bio-based epoxy active tanning agent. Background technique

[0002] In recent years, my country's fur industry has developed rapidly, but fur tanning technology is still relatively backward. The tanning of bulk fur, such as sheep fur, sheep shearling, beach sheepskin and lamb skin, still mainly uses formaldehyde or formaldehyde-aluminum or formaldehyde- Chrome salt tanning process. Although these tanning processes have the characteristics of low cost, mature process, easy operation and white coat, there are problems affecting the health of operators and environmental pollution. What is more serious is that there are A large amount of free formaldehyde cannot be effectively removed even if a formaldehyde remover is added in the post-finishing process. The product will continuously release formaldehyde during use or storage, which will pose a pote...

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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