Waterproof agent and wool dyeing agent for chrome-free tanned Chenille leather and environment-friendly dyeing process of chrome-free tanned Chenille leather

Abstract

The invention provides a waterproof agent for dyeing chrome-free tanned woolen leather, the waterproof agent comprising the following components in parts by weight: 1.8-2.2 parts of a waterproof fatting agent, 1.2-1.8 parts of a metal tanning agent and 800-1200 parts of water. The invention further provides a wool dyeing agent for dyeing the chrome-free tanned wool leather and a dyeing process. According to the invention, the waterproof agent with a specific ratio is adopted, no chromium-containing material is adopted, waterproof treatment is carried out after the last time of acid pickling after plate dyeing, and the waterproof fatting agent is selected to be matched with the metal tanning agent, so that the waterproof performance is greatly improved by combining the two agents. The problems of poor quality and environmental protection during dyeing of chrome-free tanned Chenille leather and the problems of poor product performance, potential safety hazards in wearing and the like caused by conventional process treatment are effectively solved, and meanwhile, the product has the characteristics of thinness, lightness and softness, is light and comfortable to wear, good in heat retention property, excellent in leather waterproofing effect and high in shrinkage temperature, and realizes zero content of hexavalent chromium.

Description

technical field [0001] The invention belongs to the technical field of leather treatment and processing, and relates to a water repellant, a hair dyeing agent for chrome-free tanned leather and a dyeing process for chrome-free tanned leather, in particular to a chrome-free tanned sheep shearling leather Waterproofing agent, hair dyeing agent and environmentally friendly dyeing process of chrome-free tanned sheep shearling leather. Background technique [0002] Leather treatment refers to the process of turning perishable raw hide, that is, raw hide into soft and non-perishable leather after a series of processes. Usually from the raw leather to the finished leather, it is roughly divided into three stages, the preparation stage, the tanning stage and the finishing (finishing) stage, mainly including soaking, fleshing, depilation, liming, degreasing, softening, pickling, tanning and The follow-up finishing stage can be subdivided into batches--(meat removal)--weighing--preso...

AI Technical Summary

Problems solved by technology

However, it still exists. The one-time investment in the purchase of dry cleaning equipment is huge, and special personnel are required to maintain and maintain it in the later period. Dry cleaning will cause excessive damage to the wool fiber and poor oiliness, resulting in dry and astringent hair, and the color plumpness of the board surface will also be reduced during dyeing; although the addition of chromium-containing materials in the retanning process can improve the performance of the finished product, such as fullness of the leather board Degree, softness, waterproof performance, etc., but at the same time, it also causes hidden dangers in environmental protection and safety.

One is that chromium-containing waste cannot be effectively treated, which is harmful to the environment; the other is that the finished product of chrome tanned leather contains trace amounts of hexavalent chromium, and the safety of long-term wearing cannot be guaranteed; while high-temperature dyeing of wool requires high production energy consumption, and high-temperature dyeing of wool takes a long time Maintaining the dyeing bath at 65-70°C consumes high heat energy costs, and frequently causes quality problems, the skin is easy to shrink, and the operation is difficult.

Images