Active dye applied to wool and wool dyeing method

Abstract

The invention relates to a wool dyeing method and in particular relates to an active dye for wool and a wool dyeing method. In order to reduce the emission of pollutants, reduce energy consumption and improve the dyeing efficiency, the invention provides a novel wool dyeing method. According to the novel wool dyeing method, dyes and additives are reasonably selected and the dyeing process is optimized, so that the purpose of saving energy, reducing emission and improving the dyeing efficiency can be achieved, and the development requirements of relevant fields can be met. Compared with the existing wool dyeing process of the active dye, the wool dyeing process has the characteristics that a common vinyl sulfone active dye is adopted instead of alpha-acrylamide active dye generated in Australia and applied to the wool, and the dye cost is reduced; the processes of washing with alkali at high temperature, soaping and overflowing and washing for a plurality of times are omitted, the energy consumption is reduced, the sewage discharging amount is greatly reduced, and the dyeing efficiency is improved; the dyeing step is carried out at 85 DEG C, the fixation step is carried out at 30 DEG C, and the damage to the wool is reduced; the low-temperature fixation process is adopted, the fixation rate can reach over 98%, all color fastness indexes are improved, particularly the dyed products does not need to be soaped, both dry rubbing fastness and wet rubbing fastness reach over grade IV, and the wool fabric product is free of color staining during post-treatment; and the dyed wool can meet the crabbing requirements of fine wool fabric products.

Description

technical field [0001] The invention relates to a wool dyeing method, in particular to a reactive dye for wool and a dyeing method thereof. Background technique [0002] Traditional wool dyeing uses acid dyes, acid mordant dyes, and neutral dyes. Due to various reasons, the use of the above-mentioned dyes is limited. Reactive dyes have bright colors and good wet fastness, and have been widely used in wool dyeing. For example, Ciba's Lanasol reactive dyes for wool containing α-acrylamide groups, the dyeing process is as follows: dyeing - overflow washing - alkaline washing - soaping - overflow washing. The dyeing method is dyeing at 98°C, which has poor level dyeing property and a large amount of acid. After dyeing, overflow washing is required to increase the pH value after dyeing. The alkali washing process is 85℃×20 minutes, and the pH value is about 8-8.5. During the alkali washing, a large amount of dyes are washed off, and soaping is carried out later. The soaping p...

AI Technical Summary

Problems solved by technology

[0003] The dyeing process has the following problems: expensive dyes, high dyeing costs, high temperature dyeing, alkali washing

Soaping will cause great damage to wool. Dyeing at 98°C, alkali washing at 85°C, and soaping will consume a lot of energy. Overflow washing, alkali washing, and soaping will cause a lot of dyeing sewage. According to product requirements, staining will occur during post-processing of wool yarn-dyed products

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