Method for spraying wet steaming and dyeing cotton fabric by using reactive dye

Abstract

The invention provides a method for spraying wet steaming and dyeing fabric by using reactive dye, which belongs to the technical field of textile printing and dyeing. The fabric and the baffle plateform an opening atomizing box, dye liquor containing a fixing agent is sprayed into the atomizing box through an atomizing device, and then a suction is carried out on the back surface of the fabric at the bottom position of the atomizing box. After the fabric passes through the atomizing box, the fabric is steamed and fixed in normal pressure saturated steam, and then the dyeing process is finished after water washing and soaping treatment. By adopting the method for carrying out reactive dye spraying wet steaming and dyeing on fabric, the large fluctuation of steaming and color fixing conditions caused by the fact that the fabric with high liquid content enters a steaming box can be avoided, the temperature rise rate of the fabric is improved, the color fixing time is shortened, and thehydrolysis of dye on the fabric in damp-heat and alkaline environments is reduced, which is favorable for improving the fixation rate of the reactive dye, and fabrics with different dyeing effects canbe obtained by adjusting spray and suction mode and dye liquor ratio.

Description

technical field [0001] The invention relates to a fabric dyeing process, in particular to a fabric wet-steaming dyeing process, which is applied in the technical field of textile dyeing and finishing. Background technique [0002] Reactive dyes have complete chromatograms, bright colors, relatively simple application process, and can form covalent bonds with cotton fibers. It has become the main substitute dye, and its development is particularly rapid. Now it has become the most important type of dye for cotton fabrics. [0003] At present, the continuous dyeing of cotton fabric with reactive dyes mainly adopts the following dyeing process: padding dye solution → drying → padding lye → steaming, that is, padding, drying, padding and steaming process. Reactive dyes can undergo nucleophilic substitution or nucleophilic addition reactions with the hydroxyl groups on cotton fibers to form covalent bonds, so dyed fabrics have high wet fastness, but there are also some problems ...

AI Technical Summary

Problems solved by technology

Reactive dyes can undergo nucleophilic substitution or nucleophilic addition reactions with the hydroxyl groups on cotton fibers to form covalent bonds, so dyed fabrics have high wet fastness, but there are also some problems in the dyeing of reactive dyes, especially reactive dyes. When dyes react with cotton fibers, there are serious hydrolysis problems, so the utilization rate of reactive dyes is low, the amount of sewage discharge is large, the color fastness of dark varieties is poor, and the amount of electrolytes for dyeing is large, which hinders its expanded application. is the current difficulty that needs to be solved urgently

[0004] In the existing dyeing process of reactive dyes, the waste of dyes is relatively serious, resulting in high production costs. The use of high-efficiency, energy-saving and environmentally-friendly processes has attracted widespread attention in recent years.

A lot of attempts have been made in this field at home and abroad, for example, the German Hoechst company and the Bruckner Machinery Factory jointly developed the Eco-Steam system, the German Monforts company and Zeneca company jointly developed the Econtrol process, the German Babcock Textile Machinery Company and the German BASF company The Babco-Therm dryer was developed, and the new Eco-Flash process was introduced. These all belong to the wet short steaming process. There are advantages such as less dye migration and high dyeing quality, but there are problems in the implementation and promotion of these wet steaming dyeing methods: mainly because the imported equipment is expensive, the process control is difficult, and the domestic equipment needs to be improved.

Domestic also people have carried out some attempts in this respect, as the Chinese patent that publication number is CN104532499A discloses a kind of reactive dye padding wet-steaming dyeing method, is to carry out vacuum dehumidification to the fabric after fabric padding dyeing liquor earlier, reduces fabric liquid-carrying rate, and then fix the color by steaming, but this method has certain difficulties in operation in actual continuous dyeing

At present, the serious problem of dye hydrolysis during wet steam fixation of reactive dyes needs a low-cost and more effective solution, which has become an urgent technical problem to be solved.

Images