Polyester/polyurethane knitted fabric rose red system dyeing method

Abstract

The invention discloses a polyester / polyurethane knitted fabric rose red system dyeing method. The method comprises the steps of dyeing pretreatment, rose red system dyeing and dyeing post-treatment, wherein the dyeing post-treatment is free of reduction washing, a dyeing solution contains a novel rose-red disperse dye and a moisture-absorbing and sweat-releasing finishing agent; the rose-red disperse dye is an azo disperse dye with a coupling component containing a phthalimide structure; and the moisture-absorbing and sweat-releasing finishing agent comprises WELNOL SR-631 or FERAN ICE. According to the novel rose-red disperse dye disclosed by the invention, the coupling component contains the phthalimide structure, so that the novel rose-red disperse dye is very firmly combined with polyester, the staining phenomenon of polyurethane is greatly reduced, and the fastness requirement can be met without reduction washing. By adding the moisture-absorbing and sweat-releasing finishing agent into the dye solution, the novel rose-red disperse dye can be stably dispersed in the dye solution in a monomolecular state, so that association and condensation in a high-temperature and high-pressure state are avoided, and the problem that the rose-red dye is easy to dye and stain is finally solved.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and in particular relates to a rose red dyeing method for polyester / ammonia knitted fabrics. Background technique [0002] The dyeing process of polyester / spandex knitted fabrics mostly uses disperse dyes to dye polyester, and then removes the disperse dyes on the spandex and the floating color on the polyester surface by reduction washing. [0003] Due to its bright color, rose red has become a favorite color of many brand designers. Although there are certain differences in color between different brands, they are basically rose red. [0004] At present, there is following problem in the method for existing polyester / ammonia knitted fabric dyeing rose red system: [0005] (1) The staining of spandex is serious. It usually takes 1 to 2 times of reduction washing to completely remove the disperse dyes on the spandex and the floating color on the polyester surface, so as to me...

AI Technical Summary

Problems solved by technology

[0005] (1) The staining of spandex is serious, and it usually takes 1-2 times of reduction washing to completely remove the disperse dye stained on the spandex and the floating color on the polyester surface, thereby Meet the fastness requirements, but reduction washing wastes water resources and is not friendly to the environment

[0006] (2) The problem of color flower and color stain is relatively prominent, which affects the appearance of the cloth surface