Potassium permanganate mediated oxidation dyeing method

Abstract

The invention relates to the field of animal fur processing and particularly relates to an oxidation dyeing method utilizing potassium permanganate as a medium. The oxidation dyeing method comprises the following steps: preprocessing raw material fur, and carrying out wool opening by virtue of a first mixing water solution containing sodium carbonate, ammonia water and a degreasing agent; washing; soaking the washed raw material fur for 20-40 minutes by virtue of a water solution containing potassium permanganate and a penetrating agent, adding lactic acid, continuously soaking, and carrying out oxidation dyeing after the soaking; washing the dyed raw material fur for eliminating a flooding phenomenon, carrying out retanning, drying, adding oil, standing, dry washing, and dry shoveling, so as to obtain finished products. According to the oxidation dyeing method, the potassium permanganate is utilized for replacing toxic potassium dichromate to serve as a medium auxiliary during the oxidation dyeing, the thicknesses and pores of obtained oxidation films are uniform, and the colors of the dyed fur are uniform; furthermore, the process is safe and reliable to operate, the environmental pollution is effectively reduced, and the obtained fur is safe and harmless to human bodies.

Description

technical field [0001] The invention relates to the field of animal fur treatment, in particular to a potassium permanganate-mediated oxidative dyeing method. Background technique [0002] Fur has a long history and tradition in China. It has always had a breeding industry, a dyeing factory and a garment manufacturing industry. It is a major exporter and consumer of fur garments. Nowadays, the fur industry is developing rapidly in China, and the production technology has gradually reached international standards. According to incomplete statistics, in 2002, there were more than 600 fur dyeing and dyeing factories, more than 500 fur garment factories, more than 100,000 employees, and furs exported all over the world. But the accompanying pollution also poses a big challenge to China, especially the pollution from the fur dyeing process. In today's rapid economic growth, environmental protection is extremely important to us, and the production and application of clean techno...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the strong oxidizing properties of potassium dichromate, an oxide film layer can be formed in the fur surface treatment, which is beneficial to the subsequent dyeing. Therefore, potassium dichromate is usually used as a mordant in the fur dyeing process before soaking. Oxidative dyeing, but potassium dichromate is a toxic chemical reagent, which not only brings physical harm to the operator, but also pollutes the environment. In addition, the residual potassium dichromate on the fur is also potentially harmful to the human body