Two-step color fixing technology for reactive dye fabric dyeing

Abstract

The invention relates to a two-step color fixing technology for reactive dye fabric dyeing, belonging to the technical field of fabric dyeing. The technology comprises the following steps: (1) firstly, fixing the color in a baking manner, wherein the consumption of sodium carbonate and urea in a dyeing formula is subtracted by about 60 percent, and after the fabric subjected to dyeing liquor padding is baked, the baking color fixing rate can reach 50 to 60 percent; (2) secondly, fixing the color in a steaming manner, wherein after the dyed fabric is baked, the fabric pad-rolls color-fixing liquor (containing appropriate amount of alkaline agent, urea and table salt) steam. In the technology, when in reactive dye deep-color dyeing, the novel two-step color fixing process of baking and steaming is adopted, the consumption of additives can be reduced, the color fixing rate and color yield brightness of the dyed fabric can be improved, and the environmental pollution can be reduced. By adopting the novel color fixing process, the leveling property and dye permeability of the dyed fabric can be improved, cotton neps on the fabric surface can be reduced, and the brightness of the fabric surface can be improved.

Description

technical field [0001] The invention relates to a two-step color-fixing process technology for fabric dyeing with reactive dyes, belonging to the technical field of fabric dyeing. Background technique [0002] Reactive dyes not only have the characteristics of bright color, complete chromatogram, low cost, and convenient use, but also can replace many banned dyes with the implementation of new environmental protection regulations, so they are more and more widely used. In continuous pad dyeing, baking fixation and steam fixation are commonly used, both have their own advantages and disadvantages, especially in dark dyeing. The color of the baking method is dark, the dyeing property is poor, and there are many neps on the cloth surface; the color fixing rate of the steam-fixing method is low, and the dye loss is as high as about 30%, resulting in a large amount of dark wastewater and serious environmental pollution. Contents of the invention [0003] The object of the pres...

AI Technical Summary

Problems solved by technology

The color of the baking method is dark, the dyeing property is poor, and there are many neps on the cloth surface; the color fixing rate of the steam-fixing method is low, and the dye loss is as high as about 30%, resulting in a large amount of dark wastewater and serious environmental pollution.