One bath process-based desizing dyeing method of size-containing polyester fabrics and special auxiliaries for dyeing method

Abstract

The invention discloses a one-bath process-based desizing dyeing method of size-containing polyester fabrics and special auxiliaries for the dyeing method. The method comprises the following steps: putting the size-containing polyester fabrics in water, adding one bath auxiliary A to the water, mixing thoroughly and then adding a dye to the water, mixing thoroughly again and then orderly performing heating, heat preservation and cooling treatment on the obtained system containing the fabrics; next, adding one bath auxiliary B and sodium hydrosulfite to the cooled system for reductive cleaning; and finally, discharging residual liquid and cleaning with warm water, thereby obtaining the desized and dyed polyester fabrics. The one bath auxiliary A comprises the following components in percentage by mass: 15%-20% of wetting emulsifier, 15%-20% of level dyeing diffusant, 4%-6% of chelating disperse agent and the balance being water. The one bath auxiliary B comprises the following components in percentage by mass: 15%-30% of sodium polyacrylate, 20%-40% of sodium hydroxide and 40%-60% of sodium carbonate. The one-bath process-based desizing dyeing method of the size-containing polyester fabrics is only carried out in one bath, and therefore, the processing time is obviously shortened and the quality of the fabrics can be guaranteed favorably; a low amount of water is used and water can be saved by 80%; the energy consumption is low; few types of auxiliaries are utilized.

Description

Technical field [0001] The invention belongs to the technical field of dyeing and finishing processes for polyester woven fabrics in the textile printing and dyeing industry, and specifically relates to a one-bath method for desizing and dyeing polyester pulp-containing fabrics and a special auxiliary agent. Background technique [0002] Polyester is a synthetic fiber that is widely used in textiles and has excellent comprehensive properties. The polyester filament fabric must be sizing before weaving, so that the surface of the thread is covered with a smooth, flexible and firm sizing film to enhance the cohesion and abrasion resistance of the polyester filament, so that it can withstand the various weaving process. Friction and tension make the weaving production go smoothly under the requirements of high quality and high yield. [0003] Under normal circumstances, desizing treatment must be carried out before dyeing, otherwise it will affect the uniformity of fabric dyeing, the...

AI Technical Summary

Problems solved by technology

This process greatly saves water, electricity, steam, energy saving and emission reduction, and alkaline bath dyeing can reduce the problem of color flower and white powder caused by oligomers, but there are also the following main problems: polyester alkaline bath dyeing has been studied for many years, so far The main reason why it has not been fully promoted is that some disperse dyes, such as amido and ester groups, undergo hydrolysis under high-temperature alkaline conditions, and the color and light change greatly, so the selectivity to dyes is large, such as disperse deep blue HGL / S- 3BG, Disperse Ruby 5BL, Disperse Bright Yellow SE-4GL / S-6GLN, Disperse Fluorescent Yellow 10GFF / 8GFF, Disperse Fluorescent Red G, Disperse Yellow SE-RL, Anoky DRD / PUD series, DyStar EX / SF series etc. cannot be dyed in an alkaline bath

Continuous desizing process and oxidation desizing process failed to fundamentally solve the problems of high energy consumption and high emission in polyester desizing; alkaline bath desizing and one-bath dyeing process also have strong dye selectivity, incomplete chromatogram, heavy Difficult to solve problems such as poor performance

Images