Technique for preparing chrome-free tanning and plant-free tanning goat upper leather

Abstract

The invention discloses a production process for goat free-chrome and no-vegetable tanned vamp leather, which comprises the steps of rewatering, tanning, alkaline extracting, oxidating, rinsing, neutralizating, retanning and filling, oiling and fixing. The production process is characterized in that the tanning process adopts phosphorus tanning agents to replace the chrome tanning agents with heavy pollution, which are adopted in the industry, the solution PH is increased to 5.0 to 5.5 by alkali liquor to fix the phosphorus tanning agent, the uncombined tanning agent is further fixed by using sodium perborate; the synthesized tanning agents such as synthesized tanning agents, resin tanning agents, etc. rather than the current used chrome tanning agents are adopted to retan during retanning. The invention overcomes the current situation of serious chrome pollution in the leather manufacturing industry, the leather body of the made free-chrome no-vegetable tanned goat vamp leather is full, soft and elastic, the grain surface is neat and fine, the shrinking temperature of crust leather can reach to 92 DEG C, all the other physical and mechanical properties meet the requirements for the goat vamp property, and moreover, the wastes which are produced during the production process can be degradated to achieve the emission without pollution.

Description

technical field [0001] The invention relates to a leather processing technology, in particular to a production technology of chrome-free tanned non-vegetable tanned goat shoe upper leather. Background technique [0002] Traditional leather mostly uses chrome as a tanning agent, and the processed chrome-tanned leather has the advantages of high humidity resistance, good thermal stability, plump leather body, and softness. However, because chromium ore resources are limited, people urgently need to find a substitute. Moreover, due to the toxicity of hexavalent chromium remaining in the tanning process, the chrome tanning process will cause serious pollution to the environment, and it is still difficult to effectively prevent and control it at present. Therefore, under the situation that people pay more and more attention to the living environment and pay attention to the use of environmentally friendly leather, it has become an inevitable trend to develop chrome-free tanned l...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a production process of chrome-free tanned non-vegetable tanned goat shoe upper leather, which solves the problem of chromium pollution in the process of tanning and the biodegradation of the leftovers from tanning