Method for continuously dyeing yarns

Abstract

The invention provides a method for continuously dyeing yarns. The method comprises the following steps: selecting yarns as a dyeing raw material; selecting an azoic coupling component AS-BO as a prime liquid; dissolving the azoic coupling component; exhausting fluid for the yarns; diazotizing colorradical blue BB which is selected as a color developing agent; dissolving color salt; adding a neutralizer and antalkaline; performing a coupled developing process, controlling the concentration, pH value, temperature, time and other parameters during coupling; rinsing and soaping, and rinsing; and dyeing for the second time, calculating the dosage of a bottoming agent in refill and dosage added into caustic soda, and repeating the process of developing, rinsing, soaping and rinsing to complete continuous dyeing for yarns. According to the method, a dyeing method is improved, a repeated durable dyeing process operation is adopted, the stability for material dyeing is reinforced, the coloring effect is uniform, and defects occurring in single printing and dyeing process is avoided by means of repeated printing and dyeing.

Description

technical field [0001] The invention relates to the technical field of textile printing and dyeing, in particular to a continuous dyeing method for yarns. Background technique [0002] Yarn is a product processed from various textile fibers into a certain fineness, which is used for weaving, rope making, thread making, knitting and embroidery, etc. Traditional yarns are dyed after being made into packaged yarns. Since the yarns of packaged yarns are relatively tight, the color is not easy to penetrate into the inside of packaged yarns during dyeing, which will lead to a low color sampling rate, reaching Unexpected dyeing effect. [0003] In the prior art, during the dyeing process of the yarn, the materials often have defects such as color difference, color wilting, deep and light spots and stripes. Due to the repeated priming, the amount of the primer solution in the tank is inaccurate, resulting in a difference in the tank, which causes color difference when the dye is c...

AI Technical Summary

Problems solved by technology

Due to repeated priming, the amount of priming liquid in the tank is inaccurate, resulting in a difference in the tank, which causes color difference when continuing to dye

During the dyeing process, the pH value of the chromogenic solution is not adjusted properly, or the coupling speed is adjusted too fast or too slow, resulting in poor coloring effect

The primer solution promotes uneven dyeing, which makes the color phenol dye uneven; the color developer is not completely dissolved or is poorly dissolved, and irregular deep spots are formed on the dyed matter

Streaks appear on the material due to incomplete hydrochloric acid in the chromogenic solution, or failure to carry out diazotization, or improper operation of diazotization

The fluidity of the dye solution in the yarn to be dyed is not good, the dye is expensive, the dyeing cost is high, the high temperature dyeing will cause great damage to the raw material, and it is difficult to control the shade after dyeing