Spray coloring stack dying process for cotton woven fabrics

Abstract

The invention relates to a spray coloring stack dying process for cotton woven fabrics, Gray fabrics are dyed by adopting a reactive dye, an accelerating agent and an alkaline agent. The spray coloring stack dying process for cotton woven fabrics is characterized in that pre-processed gray fabrics are wound to two parallel fabric guide rollers, wherein one end of the gray fabrics is wound on the first fabric guide roller, and the other end of the gray fabrics is wound on the second fabric guide roller so that the gray fabrics between the two fabric guide rollers are in a flat condition; and spray heads are arranged on the front or / and the back of the flat gray fabrics opposite to the gray fabrics, and are used for applying a reactive dye water solution, an accelerating agent water solution and an alkaline agent water solution to the gray fabrics. In the process, the cotton woven fabrics and the dyeing solutions are in the ultralow proportion in weight of 1:1 to 1:1.5, the dye, and the accelerating agent and the alkaline agent are applied in a continuous and circular spray mode, and are stacked in a container in a temperature controlled condition so that more than 90% of the dye can be in linking reaction with the cotton fibers sufficiently. The spray coloring stack dying process for cotton woven fabrics has the advantages of high dyeing efficiency, low exhaust, no color differences among the front, middle and back parts as well as the left, middle and right parts, and flat dyed fabrics without color embossing.

Description

technical field [0001] The invention relates to a cotton fabric dyeing process, in particular to a cotton fabric dyeing process by spraying and stacking dyeing. Background technique [0002] In the field of textile dyeing, the dyeing of cotton fabric refers to the process of coloring cotton fabric with dyes and auxiliaries. Cotton woven fabrics include cotton knitted fabrics, cotton woven fabrics and non-woven fabrics. There are two types of cotton woven fabrics: cylindrical cotton woven fabrics and open-width cotton woven fabrics. The cross section of cylindrical cotton woven fabrics is cylindrical. , The cross-section of the open-width cotton fabric is "one"-shaped. Both cotton fabrics can be dyed with the same coloring process. At present, the dyeing of cotton fabrics usually adopts two kinds of exhaust dyeing method and pad dyeing method. According to the point of view of modern dyeing theory, the reason why dyes can dye fibers and have a certain fastness on fiber fab...

AI Technical Summary

Problems solved by technology

This method is a good way to save energy and reduce consumption, and to maximize the use of dyes, but this method has the following hidden dangers, and some defects will affect the one-time success rate of dyeing in actual production:

[0004] 1. Because padding cannot get rid of the dye liquor, and the dye liquor is limited by the liquor ratio and cannot be made very low, so it takes enough time for the dye to be dyed and exchanged, so that the fabric absorbs the dye for a long time, and the waste liquor after use exists Sewage problem

[0005] 2. During the padding process, the circular knitted fabric will be squeezed by the rolls, and the two edges of the fabric will leave a rolling mark (indentation) due to folding, even if each squeeze is used to reverse the edge of the circular knitted fabric If the angle is different, two selvedges will still be printed, especially in the case of tight fabrics, it is more likely to cause permanent printing, which becomes a defect that is difficult to repair.

[0006] 3. Since the dyes and sodium sulfate are sprayed in batches and batches based on experience, it is impossible to guarantee the uniformity of the dye and sodium sulfate adsorption on each part of the dyed fabric, and it is easy to cause the dyed fabric to be dyed. Color difference of tail or left, center and right

Once the color difference causes quality problems, it must be stripped and re-dyed, which will cause a lot of waste.

The addition of alkali agent in batches will also produce similar consequences

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