Dyeing method of cotton fabric

Abstract

The invention discloses a dyeing method of a cotton fabric. The dyeing method comprises the following steps: (1) pre-treating; (2) dyeing; (3) carrying out aftertreatment. Compared with the prior art,the dyeing method of the cotton fabric, disclosed by the invention, has the beneficial effects that strength damages to the cotton fabric can be avoided through a pre-treatment procedure and the dyeing and finishing processing efficiency is improved; a dyestuff used by the dyeing method can be used for improving the color fastness of the fabric and the color and luster are stable after the fabricis dyed. By adopting the dyeing method provided by the invention, the coloring rate and qualified rate of the cotton fabric can be improved; the color fastness of a finished product is high and an operation process is simple; the dyestuff has good stability in a vat and the uniformity of fiber dyeing is easy to control.

Description

technical field [0001] The invention relates to the field of fabric dyeing and finishing, in particular to a cotton fabric dyeing method. Background technique [0002] Cotton fabrics are the first choice for T-shirts, underwear, and sports and leisure fabrics because they are comfortable to wear, soft, and not easy to deform. However, natural cotton fibers themselves contain natural impurities such as oil, wax, ash, pectin, lignin, and pigments. It needs to be removed through scouring and bleaching processes, and the fluff on the surface of cotton knitted fabrics is gradually exposed on the surface of the fabric during the weaving process and dyeing and finishing process. The length of these fluff affects the appearance and smoothness of the fabric, and it needs to be removed through certain processing. Most of the fluff is added to make the surface of the fabric smooth, so as to improve the softness, hygroscopicity, whiteness and smoothness of the cotton fabric. [0003]...

AI Technical Summary

Problems solved by technology

[0003] The dyeing of cotton fabrics mainly uses reactive dyes at present, but because cotton fibers have negative charges, and reactive dye molecules contain more anionic groups, they also have negative charges in aqueous solution, and the existence of electrostatic repulsion makes it difficult for dye molecules to approach cotton. Therefore, it is necessary to add a large amount of inorganic salts to promote dyeing in the dyeing process to increase the dye uptake rate of dyes. come a big burden