A kind of cold pad batch decolorization method of colored wool

Abstract

The invention relates to a colored velvet cold-pad batch decolorizing method, and belongs to a pretreatment process technology of textile printing and dyeing. By changing a colored velvet decolorizing process route and a preparation method of a decolorizing solution and performing cold-pad batch decolorizing on colored velvet by use of a solution prepared by mixing high-proportion ethanol and a little water with a decolorizing reagent, strength damage to the colored velvet can be effectively reduced in a decolorizing process, the pigment solubility is improved, and the decolorizing difficulty is reduced; meanwhile, the water consumption and sewage discharge are reduced to a great extent, the quality of the colored velvet is improved, and the quality is good and the efficiency is high. The cold-pad bath decolorizing technology provided by the invention is simple and convenient and realizes a good decolorizing effect and high efficiency; through recycling of an alcohol organic solvent, the burden of sewage treatment on an enterprise is remarkably reduced; the cold-pad bath decolorizing technology is a clean production technology conforming to the environmental protection requirement, and has remarkably high social and economic benefits.

Description

technical field [0001] The invention relates to a cold pad-batch decolorization method for colored cashmere, which belongs to the pretreatment technology of textile printing and dyeing. Background technique [0002] Among the animal fibers, quite a few fibers have natural color, especially some special animal fibers with large output in China, such as purple cashmere, green cashmere, yak hair, camel hair and so on. Among them, cashmere is a precious natural protein fiber and a valuable raw material in the textile industry, known as "the crown of fibers", "the king of wool" and "soft gold". In addition, the fineness of cashmere is mostly 13-17 μm, the unevenness of fineness is small, and the length is between 21-40 mm. It has excellent characteristics such as fine fiber fineness, soft hand feeling, lightness, warmth retention and natural luster. Camel hair is also an important textile raw material, which has the characteristics of high elasticity, soft touch and good luster....

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the decolorization time is longer and the decolorization temperature is higher

However, its disadvantage is that this method does not improve the fluff strength

Although it uses organic solvents such as 3-butoxyl-1-propanol to carry out pickling fumigation and decolorization of purple velvet, it does reduce the color residual rate of velvet, but its disadvantage is that its pickling solution and decolorization There are many types of organic solvents and other chemical additives used in the liquid, the preparation is more complicated, the recovery is difficult, and the cost is high

Although it adopts pigment separation and protection, purple velvet protection and stabilization, purple velvet reduction bleaching, and the decolorization method of purple velvet reduction protection have indeed played a role in simplifying the decolorization process and reducing production costs, but its disadvantage is that in the decolorization process it needs Add special T1 pigment separation agent, T2 wool protection agent, T4 complexing agent, T5 oxidation stabilizer, etc., the formula is more complicated

Although it adopts the decolorization method of pickling, pretreatment, oxygen bleaching and reduction bleaching to improve the whiteness of green velvet and reduce the strong damage, its disadvantage is that a certain concentration of sericin and sericin must be added in the decolorization process. Organic phosphonic acid and its sodium salt increase the cost to a certain extent and have certain limitations