Coffee reactive dye composition and dyeing process

Abstract

The invention relates to a coffee reactive dye composition and a dyeing process. The dyeing process is characterized by comprising the following steps: 1, feeding cloth in a dye vat, adding caustic soda, a deoil agent and a refining agent, when the temperature is raised to 70-75 DEG C, adding a hydrogen peroxide solution, heating the mixture to 98-100 DEG C, and conducting cotton bleaching for 10-12 minutes; 2, washing the mixture with clear water, heating the mixture to 60-65 DEG C, adding anhydrous sodium sulphate into the dye vat, subsequently, raising the temperature to 65-66 DEG C, slowly adding dye which is stirred uniformly, and completing dye adding within 10-15 minutes; subsequently, adding sodium carbonate, and preserving the temperature for 10-15 minutes, wherein the dye comprises reactive red LC-DB, reactive orange LC-4RN and black B133, the using amount of the reactive red LC-DB is 0.75% o.w.f +/- 0.5 mg, the using amount of the reactive orange LC-4RN is 1.5% o.w.f +/- 0.5 mg, and the using amount of the black B133 is 1.55% o.w.f +/- 0.5 mg; 3, conducting fixation, after fixation is ended, conducting washing with clear water, conducting pickling, conducing washing with clear water, conducting soaping, conducting washing with clear water, and taking the cloth out of the vat after pickling is completed. By means of the coffee reactive dye composition and the dyeing process, consumption of dye for fabric in dark color is reduced, generation of colored tone is avoided, the utilization rate of the dye is raised, and sewage drainage is reduced.

Description

technical field [0001] The invention relates to a brown reactive dye composition and a dyeing process, belonging to the technical field of reactive dye dyeing methods. Background technique [0002] Reactive dyes are the most important and main category in the dye industry. During the dyeing process, reactive dyes are first adsorbed on the surface of the fiber and then diffused into the interior of the fiber. Due to the bond between the dye and the fiber during the fixation stage, the achieved adsorption balance is destroyed, and The alkali agent is also a dyeing accelerator, and the dyestuff is further adsorbed, which promotes the dyestuff to be more combined with the fiber. [0003] Because the affinity of reactive dyes is generally low, it is generally necessary to use a large amount of sodium sulfate or salt to promote dyeing. In order to prevent dye hydrolysis, dyeing is generally carried out under neutral conditions. [0004] The fixation of reactive dyes refers to the...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the amount of dye used in dark fabrics is generally relatively large, and there is a phenomeno...