Non-aqueous media dye-fixation method suitable for reactive dye

Abstract

The invention discloses a non-aqueous media dye-fixation method suitable for reactive dye and belongs to the field of textile dyeing and finishing technologies. The dyeing method comprises the following steps: (1) applying a reactive dye solution onto textile; (2) carrying out dye fixation on the textile in anon-aqueous media after the application of the reactive dye solution; and (3) soaping, washing and drying the textile after dye fixation so as to obtain a dyeing finished product. As there is no need to add inorganic salt or other dyeing additives by the method, water for dyeing and dyeingwastewater are greatly reduced, and dye fixation rate is raised. After dye fixation, the non-aqueous media is easy to purify and recycle, thus truly realizing ecological dyeing of reactive dyes. Thedefect that traditional reactive dye dyeing wastewater is much and hard to process and dye fixation rate is low is changed.

Description

technical field [0001] The invention relates to a new color fixing method of reactive dyes. After dyeing textiles, they are fixed in a non-aqueous medium without using inorganic salts and other dyeing auxiliaries, greatly reducing sewage, and improving the color fixing rate of dyes. It belongs to the ecological dyeing of textiles. entire technical field. Background technique [0002] Dyeing is the main processing process in the textile dyeing and finishing industry that consumes a lot of water and pollutants. Taking the dyeing of cotton yarn and cotton fabric with reactive dyes as an example, dyeing and fixation of fibers need to be completed in a water bath. The resulting problems: 1) consume a lot of water (dyeing 1 ton of cotton fiber consumes about 100 tons of water); Floating color after dyeing requires high-volume cleaning; 3) Consumes and leaves a large amount of electrolytes and other chemical additives in the wastewater; 4) Produces a large amount of high-chroma, h...

AI Technical Summary

Problems solved by technology

The resulting problems: 1) consume a lot of water (dyeing 1 ton of cotton fiber consumes about 100 tons of water); Floating color after dyeing, requiring high water volume cleaning; 3) Consuming and remaining a large amount of electrolytes and other chemical additives in the wastewater; 4) Produce a large amount of high chroma, high COD sewage discharge

However, the dyeing and fixing time of the cold pad batch process is very long, often takes about 24 hours, the production efficiency is low, the process is difficult to control, and it requires a large space for stacking

Steaming after reactive dyes are dyed is a fast color fixing method, but there is a phenomenon of "swimming" of dyes during the steaming and fixing process, and the dyeing property is poor, the shade is unstable, and the color fixing rate is low

[0004] In short, although the existing pad dyeing process can have the advantages of energy saving and emission reduction, it has the disadvantages of poor level dyeing property, color fixation rate and production efficiency that cannot be effectively improved at the same time. It is also a new process that can prevent dye migration and improve dye fixation rate and level dyeing