Low-damage dyeing process for wool

Abstract

The invention discloses a low-damage dyeing process for wool. The low-damage dyeing process comprises the following steps that A, pretreatment is conducted on a wool raw material to obtain a product A; B, low-temperature dyeing treatment is conducted on the product A to obtain a product B; C, color fixation treatment is conducted on the product B to obtain a product C; and D, post treatment is conducted on the product C to obtain dyed wool, wherein the specific process of the low-temperature dyeing treatment in the step B comprises the following steps that clear water is added into a dye vat containing the product A, the dye vat is heated to 35 DEG C, sequential adding of FFA, HAC, LT435 and reactive dye is added, the time interval for adding the FFA, HAC, LT435 and reactive dye is 5 min,the pH value in the dye vat is kept at 4.0; then, the temperature of the dye vat is raised to 70 DEG C at the heating rate of 1 DEG C / min, and the heat preservation is conducted for 15 min; and the dye vat is continuously heated to 90 DEG C, and after the heat preservation is conducted for 50-80 min, waste water is drained after washing and cooling to obtain the room-temperature product B. The low-damage dyeing process has the characteristics of being capable of effectively reducing the damage degree to wool fiber, achieving uniform dyeing and improving the color fastness.

Description

technical field [0001] The invention relates to a wool dyeing process, in particular to a wool dyeing process with low damage. Background technique [0002] Wool is a kind of natural fiber. Wool fiber has excellent curl and elasticity, keeps warm and comfortable, and is deeply loved by consumers. The color of wool fiber is not bright enough. In order to meet the needs of different consumers, manufacturers often carry out corresponding dyeing treatment according to the needs of customers to obtain wool fibers of various colors, and weave various wool fabrics through wool fibers. However, due to the tight scale layer on the wool surface, the outermost layer of the wool scale layer also contains a thin hydrophobic layer, which affects the wettability of the wool surface and hinders the adsorption and diffusion of dyes. Traditional high-temperature dyeing Methods When dyeing wool, uneven dyeing is prone to occur, and the dyeing fastness is also low, and fading is prone to occur...

AI Technical Summary

Problems solved by technology

However, due to the tight scale layer on the wool surface, the outermost layer of the wool scale layer also contains a thin hydrophobic layer, which affects the wettability of the wool surface and hinders the adsorption and diffusion of dyes. Traditional high-temperature dyeing Method When dyeing wool, uneven dyeing is prone to occur, and the dyeing fastness is also low, and fading is prone to occur

At the same time, the traditional wool dyeing process has a long process and requires high temperature, which will cause great damage to the wool fiber during the dyeing process.

Therefore, the existing technology has the problems of relatively large damage to the wool fiber, uneven dyeing and low color fastness.