Production and processing process of environment-friendly leather

Abstract

The invention discloses a production and processing process of environment-friendly leather. The production and processing process includes the steps of S1, preparation of leather collagenous fibers,wherein a soaking agent is mixed evenly in warm water at the temperature of 35-45 DEG C, soaking liquid is formed, dry leather or salted leather is washed with running water and then put in the soaking liquid, inundation is kept, constant-temperature soaking is carried out for 3-4 h, soaked raw leather is sequentially shaved, degreased, softened and pickled, and the leather collagenous fibers areobtained; S2, tanning, wherein the leather collagenous fibers are added into a tanning barrel, a nano-composite tanning agent and deionized water at the temperature of 35-45 DEG C are added, 1% of formic acid water solution is added, the pH value of the solution is adjusted to be 3.5-4.0, and rotation is carried out for 7-10 h; and S3, finishing, wherein a sodium bicarbonate solution is added intoa rotary drum, the pH value is adjusted to be 5.0-5.5, rotation is carried out for 20-30 min, dyestuff is added for dyeing treatment, grease added, rotation is carried out for 1 h, and then the environment-friendly leather is obtained after fixing, washing, drum delivering, stacking, vacuum drying and wetting-back and vibrating to be soft are completed. Environmental pollution can be effectivelyreduced in the processing process, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of leather manufacturing, and in particular relates to an environment-friendly leather production and processing technology. Background technique [0002] The animal skins used for tanning industry processing are called raw hides, which are traditionally called raw hides. It is a natural polymer material with extremely complex fiber weaving structure. Leather is a fixed and durable substance transformed from animal skin (ie raw hide) through a series of physical and chemical treatments, referred to as leather for short; tanning is actually the transformation of raw hide into leather through a series of physical and chemical treatments After the process of tanning, the leather has the properties of softness, toughness, not easy to deform when exposed to water, not easy to shrink when dry, resistant to heat and humidity, and resistant to chemical agents. It also has special advantages such as air permeability,...

AI Technical Summary

Problems solved by technology

[0004] Tanning is one of the key processes in leather making. Chrome tanning has been dominant in the tanning field since its wide application, but due to chromium pollution and resource shortage, chrome tanning will be replaced. However, other inorganic tanning agents tanning It cannot be compared with chrome tanned leather in terms of shrinkage temperature, and the leather tanned by synthetic organic tanning agents has good plumpness, but the shrinkage temperature is also lower, so the leather industry urgently needs to develop and develop new tanning agents.