A kind of dyeing method of rayon cloth with low bath ratio in air-flow cylinder

Abstract

The invention relates to a method for dyeing rayon with a low bath ratio in an air-flow vat, comprising: adding water into the dyeing vat of the air-flow vat, pouring the rayon into the dyeing vat, running to make the cloth surface thoroughly wet, and controlling the heating rate. The steam is heated to 58-60°C; 10-20wt% of return water from the dyeing vat is sent to the auxiliary vat, and the degreasing agent and penetrating agent in the same bath are dissolved in the auxiliary vat, and then pumped into the dyeing vat of the air flow vat to run, so that the cloth surface is evenly covered with additives ; Return 10‑20wt% of the dyeing vat to the auxiliary vat, add reactive dyes and dispersants to the auxiliary vat, beating and dissolving, quantitatively pump it into the dyeing vat, and at the same time the air flow cylinder continues to run. After the suction is completed, the air flow cylinder continues to run to make the cotton cloth evenly Reactive dyes: the dyeing vat returns 10-20wt% of water to the auxiliary vat three times, adding sodium sulfate and soda ash in stages, beating and dissolving, pumping it into the dyeing vat and keeping it warm at 58-60°C to ensure even dyeing and coloring of the reactive dyes; Cut the cloth and match the color, wash the cloth surface with water, and dry it after the final treatment. The method solves the problems of uneven coloring, color flowering, long process time and large amount of sewage in the low bath ratio dyeing of the rayon cloth in the air-flow cylinder.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing, in particular to a method for dyeing rayon cloth with a low bath ratio in an air cylinder. Background technique [0002] Rayon is viscose fiber (Viscose), which is a cellulose fiber obtained by extracting and remodeling fiber molecules from natural wood cellulose. Rayon has the characteristics of smooth and cool, breathable, antistatic, anti-ultraviolet, and colorful, and is currently widely used in various underwear, textile, clothing, non-woven and other fields. However, because rayon absorbs water and dyes very quickly, it is easy to cause color flowers when dyed. [0003] Existing dyeing process is a lot, for example CN 107503175 A discloses a kind of dyeing process of blended fabric, comprises the following steps, at first, desizing, degreasing; Dye in the dyeing room, keep it for 30 minutes after dyeing, take it out and dry it; then, after drying, immerse it in water at 7°C fo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for dyeing rayon cloth with a low liquor ratio in an air-flow cylinder, which solves the problem of uneven coloring, coloring, and process time of rayon cloth dyed with a low liquor ratio in an air-flow cylinder. problems such as long length and excessive sewage