Washing method capable of improving textile color fastness

Abstract

The invention relates to a washing method capable of improving textile color fastness and belongs to the technical field of textile printing, dyeing and finishing. According to the washing method, the preparation of washing liquids in a washing technology of a dyed textile is changed, and in the whole washing step, the textile is washed sequentially by an acid washing liquid, a solvent washing liquid, a soap washing liquid and a neutralization acid washing liquid, wherein each washing liquid is formed by mixing a high-proportion alcohol-type organic solvent, a small amount of water and a washing reagent, so that the problems of low textile color fastness and large water amount of a conventional pure water washing technology are solved. The washing method is capable of not only enhancing the color fastness, the brightness and the softness of the textile, but also greatly reducing the use amounts of water and washing reagents, the washing time is shorter, the production cost is reduced and the economic benefit is enhanced; besides, the pollution to environment can be greatly lowered by recycling the alcohol-type organic solvents, so that the washing method is safe, energy-saving, economical and environment-friendly and has remarkable social and economic benefits.

Description

technical field [0001] The invention relates to a washing method for improving the color fastness of textiles, which belongs to the field of textile printing and dyeing processing. Background technique [0002] Reactive dyes should be washed with water after dyeing textiles to remove unfixed dyes, chemicals and various impurities on the textiles, and improve the color fastness, vividness, feel and other wearable properties of dyed products. [0003] Due to the side reaction of dyes and water in the dye bath, the dyed fabric directly carries a large amount of dyes that are not chemically bonded to the cellulose fibers. Most of these dyes remain in the aqueous solution of the capillary network outside the textile fibers, and some Distributed in the network of pores in the fiber. The substances that should be washed off after dyeing are mainly unfixed dyes and hydrolyzed dyes. These unfixed dyes reduce the color fastness level, so they must be washed off thoroughly. [0004] ...

AI Technical Summary

Problems solved by technology

However, its disadvantage is that this method is relatively cumbersome and has certain limitations and does not fundamentally solve the problem of large water consumption in the washing process.

Although this method adopts the solvent water system to wash the pretreated cotton fabric after dyeing, it has indeed played a role in shortening the washing time and saving water, but its disadvantage is that this only uses the solvent water system in the last step of washing, and does not Does not use a solvent-water system throughout the wash and does not minimize the amount of water used throughout the wash