Cow vamp leather pretreatment method based on season change and application thereof

Abstract

The invention discloses a cattle instep leather pretreatment method based on season change and application thereof, and the cattle instep leather pretreatment method comprises the following steps: step (1), based on the weight of wet blue leather, adding 100-120% of water, controlling the temperature at 18-22 DEG C, adding 0.3-0.5% of softening enzyme, 0.5-1.0% of soaking agent and 0.8-1.2% of emulsifier, rotating, then adding 0.1-0.3% of protease and 0.5-1.0% of degreaser, and draining; (2) according to the weight of the wet blue leather, 120-180% of water is added, the temperature is controlled to be 30-35 DEG C, 0.3-0.5% of fatty alcohol and 5-8% of a composite rewetting agent are added, then 1-2% of the composite rewetting agent and 0.5-1% of a degreasing agent are supplemented, and drainage is conducted; (3) according to the weight of the wet blue leather, adding 50-100% of water, controlling the temperature to be 45-50 DEG C, firstly adding 0.5-1% of an emulsifier, 1-2% of a synthetic fatliquor and 1-3% of sulfonated oil, and draining water; according to the method, the technical effects that interfibrous substances and natural grease (beef tallow) among the leather collagen fibers are removed, meanwhile, the leather collagen fibers are relieved, and the leather collagen fibers are recovered to the original length as much as possible are achieved.

Description

technical field [0001] The invention relates to the technical field of tanning, in particular to a method for pretreatment of bovine shoe upper leather based on seasonal change and its application. Background technique [0002] In modern animal husbandry, especially in the advanced animal husbandry in European and American countries, the growth cycle of cattle, pigs, sheep, etc. is getting shorter and shorter, and the time for slaughtering has dropped from the original 3-5 years to 0.5-1 year, and the growth cycle is shortened. , but for the skin collagen fibers, the skin collagen fibers that are not yet fully mature and the stress-preserved raw skin structure, when the seasons change, the skin collagen fibers will appear obvious stress, causing the skin collagen fibers to shrink As a result, the leather collagen fibers are difficult to loosen during subsequent processing, and materials such as tanning agents, fillers, and oils in wet dyeing and finishing are difficult to pe...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a method for pretreatment of bovine shoe upper leather based on seasonal changes and its application, which solves the problem of excessive natural oil and collagen interstitial content between collagen fibers in the prior art due to seasonal changes. The technical problem of blocking the channels between the skin collagen fibers has achieved the technical effect of removing the fibrous interstitial and natural oil (butter) between the skin collagen fibers, while soothing the skin collagen fibers, and restoring the skin collagen fibers to their original length as much as possible

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