Process for continuous cationic modification of fabric and dyeing with reactive dyes

Abstract

The invention provides a method for fabric continuous cationic modification and reactive dye dyeing, which belongs to the technical field of textile printing and dyeing. The fabric first passes through a padding tank containing cationic modification and caustic soda, two dipping and two rolling, and is treated by microwave irradiation, and then passes through a padding tank containing soda ash and reactive dyes, two dipping and two rolling, and is steamed in saturated steam at normal pressure. The color is steamed and fixed, followed by water washing and soaping to complete the dyeing process. Using this method to cationic modify the fabric, realize the salt-free continuous dyeing of reactive dyes, reduce the amount of printing and dyeing sewage treatment, and reduce production costs; Obtain similar or higher surface color yield and dye fixation rate, and uniform color, better soaping fastness and rubbing fastness.

Description

technical field [0001] The invention relates to a fabric modification and dyeing process, in particular to a fabric modification and dyeing continuous treatment process, which is applied in the technical field of textile dyeing and finishing. Background technique [0002] Promoting energy conservation and emission reduction policies is an inevitable choice for building a resource-saving and environment-friendly society. The composition of printing and dyeing wastewater varies significantly depending on the production process. Among them, there are two main sources of reactive dye dyeing wastewater. One is the hydrolysis reaction of reactive dyes Reduce the utilization rate of dyes, and more dyes in the washing liquid after dyeing will cause water pollution. On the other hand, the addition of a large amount of inorganic salts in the dyeing process cannot be processed by simple physical, chemical and biochemical methods. In industrial sewage treatment, the difficulty of treat...

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Problems solved by technology

Monomer cationic modifiers have disadvantages such as poor directness, large dosage, and instability. This type of modifier has been practically used in production. Among them, 3-chloro-2-hydroxypropyltrimethylammonium chloride It has been commercialized, and it is the most widely used in cationic modification of cotton, especially suitable for padding modification process; the relative molecular weight of polymer cationic modifier is relatively large, and its directness is strong, and it can be achieved with a small amount. Very good dyeing effect, but the relative molecular weight of cationic polymer modifiers is difficult to control, and the treated fibers often have problems such as level dyeing, poor penetration, and uncontrollable shade. Although there have been a lot of research in China, so far Not promoted and applied

At present, although the continuous dyeing method of pad-dry-pad-steam dyeing has been commonly used, many technical problems have been encountered in the application of cationic modification, including the uniformity and yellowing of modified cotton fabrics, etc., so far. There is no report of using or referring to this process to carry out continuous cationic modification and dyeing of cotton fabrics with reactive dyes

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