Alkali-free dyeing process for reactive dye

Abstract

The invention relates to the technical field of fabric dyeing, in particular to an alkali-free dyeing process for reactive dye, which comprises the steps of 1 adding dye of dyed fabrics into a dye vat at the normal temperature; 2 performing the step 1 for ten minutes; 3 dissolving anhydrous sodium sulphate Na2So4 in an auxiliary vat and adding the dissolved anhydrous sodium sulphate Na2So4 into the dye vat; 4 performing the step 3 for ten minutes; 5 adding accelerating agents into the dye vat; 6 performing the step 5 for ten minutes; 7 heating the dye vat to sixty DEG C with the speed of two DEG C rising every minute; 8 performing the step 7 for sixty minutes; and 9 after the completion of the dyeing, discharging dye liquor and performing a washing procedure. Compared with the prior art, the alkali-free dyeing process for the reactive dye utilizes the accelerating agents 169 to perform alkali-free dyeing, and the dosage of the accelerating agents 169 only accounts for one eighth of sodium carbonate. Compared with production cost of a traditional process, the dyeing process saves water, electricity and steam by about 20%, improves device production capacity by about 15%, and reduces discharge of wastewater by about 20%. In addition, the value of chemical oxygen demand (COD) in the discharged wastewater is remarkably lowered.

Description

technical field [0001] The invention relates to the technical field of fabric dyeing, in particular to an alkali-free dyeing process of reactive dyes. Background technique [0002] In the traditional dyeing process of reactive dyes, soda ash or trisodium phosphate is generally used for color fixation. In the traditional dyeing process of reactive dyes, due to the very large amount of soda ash or trisodium phosphate, the production process of the dyeing process is relatively lengthy, and the dyed finished product is also prone to problems such as color blooms. Therefore, it is crucial to design a reactive dye alkali-free dyeing process that can improve the quality of the dyeing process and reduce production costs. Contents of the invention [0003] The purpose of the invention is to overcome the deficiencies of the prior art and provide a non-alkali dyeing process with reactive dyes that can improve the quality of the finished product of the dyeing process and reduce produ...

AI Technical Summary

Problems solved by technology

In the traditional reactive dyeing process, due to the large amount of soda ash or trisodium phosphate, the production process of the dyeing process is relatively lengthy, and the dyed finished product is also prone to problems such as color blooms

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