Dyeing and finishing method for pure cotton fabric

Abstract

The invention discloses a dyeing and finishing method for a pure cotton fabric. The method comprises the steps as follows: the pure cotton fabric is steeped in water for pre-swelling, and the liquid rate is 70 %-75 %; then the fabric is immersed in a dyeing liquid containing 5 wt%-10 wt% of an activated dye, the temperature is raised to 40 DEG C-50 DEG C, and heat insulation is performed for 30 min; isopropanol with the volume equal to that of the dyeing liquid is added, the temperature is raised to 80 DEG C-85 DEG C, and heat insulation is performed for 30 min; then sodium carbonate accounting for 3 wt%-5 wt% of the dyeing liquid is added; and the temperature is raised to 80 DEG C-85 DEG C, heat insulation is performed for 30 min, the fabric is cooled to the room temperature and washed with water, soaps and water sequentially, and the product is obtained. According to the dyeing and finishing method for the pure cotton fabric, the production flow is short, the process is simple, the operation is facilitated, the practicability is high, special equipment is not required, and the industrial application is easy to implement.

Description

technical field [0001] The invention relates to a method for dyeing and finishing pure cotton fabrics, in particular to a method for salt-free dyeing of pure cotton fabrics. Background technique [0002] Reactive dyes are bright in color and have excellent wet fastness. They are the most important dyes for fiber dyeing. However, in order to improve the dyeing rate and fixation rate of dyes in the dyeing process, a large amount of inorganic salts are often used. These inorganic salts pass through simple physical and chemical processes. And biochemical treatment is difficult to remove, which brings a great burden to the environment. At present, the development of low-reactive dyes and no-salt dyeing process mainly focuses on the synthesis of new dyes, the research and development of dyeing auxiliaries, fiber modification and the formulation of a reasonable low-salt dyeing process. [0003] Low-salt dyeing processes mainly include wet short steaming process, salt-free pad-stea...

AI Technical Summary

Problems solved by technology

[0002] Reactive dyes are bright in color and have excellent wet fastness. They are the most important dyes for fiber dyeing. However, in order to improve the dyeing rate and fixation rate of dyes in the dyeing process, a large amount of inorganic salts are often used. These inorganic salts pass through simple physical and chemical processes. And biochemical treatment is difficult to remove, which brings a great burden to the environment