Process of performing fixation on reactive dyed cotton fabric with reactive cationic color fixing agent

Abstract

The invention relates to a process of performing fixation on a reactive dyed cotton fabric with a reactive cationic color fixing agent. Reactive dyes are finite in fixation quantity and poor in washability when being used for dyeing fabrics with deep colors, so that the dyeing fastness is unqualified, and the color fixing agent is needed for improving the dyeing fastness. The take-up ratio of a padder is set as 85%-95%; an aqueous solution of the reactive cationic color fixing agent with the concentration of 15g / L-25g / L is prepared, wherein the reactive cationic color fixing agent is epoxy cationic polymer P (DMDAAC (Diallyl Dimethyl Ammonium Chloride)-AGE (Allyl Glycidyl Ether)); a process of padding is carried out by dipping for twice and rolling for twice; the fabric is dried at 80 DEG C, subsequently baked at 110-130 DEG C for 3-8 minutes, then washed and dried. The reactive cationic color fixing agent is applied to fixation of the cotton fabric, and the fabric with color fixed by the padding method has the characteristics that the soaping and fading fastness reaches grade IV-V, the staining fastness reaches grade V, the dry rubbing fastness reaches grade IV, the wet rubbing fastness reaches grade III-IV, the pressing-ironing fastness reaches grade IV-V, and the value of K / S is 3.85. The reactive cationic color fixing agent is capable of effectively improving various color fastnesses and K / S values of the dyed cotton fabric.

Description

technical field [0001] The invention belongs to the technical field of color fixing of cotton fabric reactive dyes, and in particular relates to a color fixing process of a reactive cationic color fixing agent on cotton fabrics dyed with reactive dyes. Background technique [0002] Reactive dyes are widely used in the printing and dyeing industry, especially in the dyeing and printing of pure cotton fabrics. Reactive dyes are also called reactive dyes. The molecules contain chemically active groups that can react with cotton, wool and other fibers in aqueous solution to form covalent bonds. They have bright color, complete chromatography, good level dyeing, simple process, and low price lower advantages. However, there are also some problems with reactive dyes. When dyeing deep and thick colors, the amount of reactive dyes fixed is often limited due to the high concentration. The free dyes and hydrolyzed dyes that are not fixed on the fibers will cause the dyeing fixation ...

AI Technical Summary

Problems solved by technology

However, there are also some problems with reactive dyes. When dyeing deep and thick colors, the amount of reactive dyes fixed is often limited due to the high concentration. The free dyes and hydrolyzed dyes that are not fixed on the fibers will cause the dyeing fixation rate to decrease and the washing performance Poor, resulting in unqualified dyeing fastness, in addition to increasing the consumption of dyestuffs and water and electricity energy, therefore, after dyeing, color fixing agents are usually used to improve the dyeing fastness of dyed cotton fabrics