A kind of tanning method of sheep shearing

Abstract

The invention discloses a tanning method of shorn sheepskin. The method comprises: 11) a step of dipping with an acid, namely, a step of adding water into a paddle, then adding industrial salt, adding an organic acid into the solution to obtain an acid dipping solution, and finally dipping fur into the acid dipping solution; 12) a step of tanning the fur after having been dipped in the acid dipping solution; 13) a step of oxidizing to remove residue of a tanning agent, and then subjecting the fur to a reduction technology; 14) retanning the fur after the oxidation and reduction steps; and 15) subjecting the fur to wet grinding, bleaching, cleaning, drying and finishing processes. According to the tanning method, the acid dipping step in tanning methods of shorn sheepskin is improved and sulfuric acid conventionally used in the acid dipping step is replaced by formic acid. The formic acid used in the tanning method provided by the invention belongs to organic acids. Compared with the fur dipped with an inorganic acid, the fur dipped with an organic acid has thick, solid and plump fur plate after the tanning step is finished and the quality of the fur plate is improved.

Description

technical field [0001] The invention relates to the technical field of sheep shearing processing, in particular to a tanning method of sheep shearling. Background technique [0002] The sheep shearing processing industry is an important traditional light industry in my country, and it is also one of the industries that emit more serious pollutants. In the sheep shearing processing industry, due to the superiority of chrome salt tanning into leather, at present, in the existing sheep shearing processing technology in my country, the traditional chrome tanning method with a history of more than 100 years is still the main tanning method in the sheep shearing processing field. Methods, due to the toxicity of hexavalent chromium, the use of chromium salts has caused great harm to the ecological environment, humans and animals, and constituted a great threat to the survival and development of human beings. With the continuous enhancement of people's awareness of environmental prot...

AI Technical Summary

Problems solved by technology

[0005] However, for those furs with thicker skins and relatively large oils, the pickling process is usually used in the process of tanning it, and in the traditional pickling process, inorganic acids are used, even if there is no Chromium tanning, most of the leather produced is of poor quality, the rough surface feels bad, and there is a problem of excessive formaldehyde

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