Wool dyeing process for improving royal blue series pippy tip and root effect

Abstract

The invention provides a wool dyeing process for improving the royal blue series pippy tip and root effect. The process comprises the following steps: step 1, yarn pretreatment: adding a penetration defoaming agent, a degreaser and sodium carbonate, and keeping the temperature at 60-80 DEG C for 20-30 minutes; step 2, yarn dyeing: adding a penetrating defoaming agent, a penetrating agent, a leveling agent, a dye, acetic acid and anhydrous sodium acetate, and keeping the temperature at 98 DEG C for 30-90 minutes; step 3, alkali treatment: adding sodium carbonate, and keeping the temperature at 84 DEG C for 20 minutes; step 4, neutralizing: adding formic acid, and operating at 40 DEG C for 15 minutes; and step 5, softening post-treatment: adding acetic acid and a softening agent, and keeping the temperature at 40 DEG C for 20-30 minutes. The ERIOFAST reactive dye is selected for dyeing the wool, the ERIOFAST reactive dye has excellent migration characteristic and can realize perfect uniform dyeing, thereby covering the difference of physical and chemical properties of wool fiber pippy tips and wool roots and effectively improving the pippy tip and wool root effect of the royal blue dyeing series on the wool fiber. Meanwhile, the reactive dye can form covalent bonds with wool fibers so that the reactive dye has excellent dyeing fastness.

Description

technical field [0001] The invention relates to the technical field of wool dyeing, in particular to a wool dyeing process for improving the hair root effect of royal blue hair. Background technique [0002] Wool is a natural protein fiber. Its root is thicker, and the outer hydrophobic scale layer is thicker, which has strong water repellency; while its tip is thinner, and the outer scale layer is thinner. At the same time, at various stages of wool growth and development, it is subjected to various climatic conditions such as light, heat, rain, oil, acid, alkali, and mechanical friction from the outside, which will cause great damage to the scale layer covered by the wool tip. Roots are better protected. At the same time, in order to reduce the fluffing of wool and improve the ease of care of wool products in daily use, various means (such as: chlorination treatment, mercerizing treatment, resin treatment, low-temperature plasma treatment, etc.) are required to partially ...

AI Technical Summary

Problems solved by technology

[0006] (1) Vinylsulfone / chloro-s-triazine bifunctional REMAZOL / LEVAFIX reactive dyes for cotton have low reactivity to wool and low color fixation rate, resulting in unsatisfactory color fastness;

[0007] (2) In the dyeing process, a large amount of sodium sulfate is used to promote dyeing, and there are a large amount of electrolytes in the dyeing wastewater, which is harmful to the environment;

[0008] (3) The effect of masking the hair root and hair tip effect is not ideal

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