Low-temperature weak-damage wool dyeing process

Abstract

The invention relates to the field of textile technology, and provides a low-temperature weak-damage wool dyeing process. The low-temperature weak-damage wool dyeing process comprises the following steps of (1) carrying out pretreatment; (2) performing hydrogen peroxide-formic acid oxidation pretreatment; (3) carrying out dyeing; (4) performing pressure relief; (5) carrying out alkali color fixingtreatment; (6) carrying out soaping; (7) carrying out water washing; and (8) performing repairing treatment, and taking out of a cylinder. The process has the beneficial effects that (1) through a triple swelling synergistic effect of the formic acid-hydrogen peroxide oxidization system, dyeing under pressure and glutamine transaminase repairing, low-temperature dyeing can be realized and the damage to the wool fibers is reduced, the dyeing can be performed at the dyeing temperature of 75-80 DEG C, the dyeing time is shortened by 30-35%, and the problem of yellowing caused by long-term boiling dyeing of wools at a high temperature can be avoided; and 2) through the process, the dye uptake and the dyeing fastness are both improved by 5-6% compared with those in the conventional dyeing method, the fiber strength, breaking elongation, and the moisture regain rate are all improved in a relatively high degree, the use amount of dye is highly reduced, and the enterprise production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of textile dyeing and finishing, in particular to a low-temperature weak-damage dyeing process for wool. Background technique [0002] Wool fiber, in the traditional dyeing process, there is a hydrophobic dense scale layer on its surface that hinders the adsorption, penetration and diffusion of wool dye molecules into the fiber, especially for dyes with low affinity, the concentration of residual dye is high, and sewage treatment It is difficult, so wool dyeing must be completed under high temperature conditions for a long time, and co-bath dyeing with multi-component auxiliaries. However, it can be known from dyeing thermodynamics that under the same dye dosage and process conditions, the dyeing rate and fixation rate of the dye will decrease as the temperature rises. This kind of long-term high-temperature boiling dyeing not only consumes a lot of energy and has a mediocre dyeing effect, but also greatly ...

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Problems solved by technology

However, it can be known from dyeing thermodynamics that under the same dye dosage and process conditions, the dyeing rate and fixation rate of the dye will decrease as the temperature rises.

This kind of long-term high-temperature boiling dyeing not only consumes a lot of energy and has a mediocre dyeing effect, but also greatly damages the scale structure of the wool fiber surface, damages the strength of wool, causes wool to turn yellow, affects the feel, luster, and vividness of the fiber, and damages the wool. excellent natural quality

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