Dyeing process of wool fabric

Abstract

The invention relates to a dyeing process of a wool fabric. The dyeing process comprises the steps such as preparing a dye mixed solution, dyeing by immersion bath, washing and drying. According to the dyeing process, an ionic liquid is used to gradually dissolve keratin on the surface of wool fiber under heating conditions to destroy a scale layer, a negative pressure and positive pressure interaction dyeing method improves penetration of the dyeing solution inside the wool fiber, so that the dyeing solution fully penetrates into the wool fiber to make the dyed wool fabric uniform inside andoutside, and the dyeing process can effectively improve the dyeing depth of the wool fabric. The dye mixed solution is heated to 30 to 90 DEG C, so that when the dyeing solution penetrates into the wool fabric, dye agent molecules have high activity so as to achieve a faster penetration speed and improve dyeing effect and efficiency.

Description

technical field [0001] The invention belongs to the field of textile printing and dyeing, and in particular relates to a wool fabric dyeing process. Background technique [0002] Wool fiber is composed of some tiny single cells. Due to the difference in size, shape, nature, arrangement and function of these cells, wool can be divided into three layers, namely scale layer, cortex layer and pith layer. [0003] Because the surface of wool is covered with scales, it is relatively tight and hard, and has a stronger ability to resist external physical and chemical effects, and has a shielding effect on the penetration of dyes, making it difficult for dyes to penetrate into the inner layer of wool. The traditional method of wool dyeing is usually in boiling. Or continue dyeing for a long time in a state close to boiling, which not only consumes a lot of energy and costs during dyeing, but also destroys the protein molecules of the wool fiber, causing the wool to turn yellow, reduc...

AI Technical Summary

Problems solved by technology

However, the above-mentioned process steps are cumbersome, and the wool fabrics treated with ionic liquids still need to be washed with ethanol. Most of the ionic liquids have a certain viscosity, and the amount of ionic liquids penetrated into the interior of the wool fiber is relatively small, which finally manifests as the pre-treatment of wool by ionic liquids. The processing rate is low and preprocessing takes a long time

Chinese patent CN105544242B discloses a low-temperature dyeing process for wool, which uses ionic liquids to gradually dissolve the keratin on the surface of wool fibers and destroy the scale layer under the condition of elevated temperature. Diffusion, accelerates the rapid penetration of dye molecules, the dyeing temperature is 90-95 ° C, but rare earths have obvious environmental accumulation, bioabsorption and enrichment, organ tissue accumulation and broad spectrum of toxic effects