Low temperature dyeing method for wool fibre

Abstract

The invention discloses a method for dyeing wool fibers at low temperature, which is characterized by comprising the following steps: increasing one or more than one Gemini cationic surfactant in the process of the prior wool acid dye dyeing or wool active dye dyeing, and then dyeing at specified temperature, wherein usually, the added weight of the Gemini cationic surfactant is 0.1 to 1.0 percent of that of the wool fibers, and the dyeing time is 40 to 90 minutes at a temperature of between 75 and 85 DEG C. The method can improve dyeing quality of the wool fibers and simultaneously reduce energy consumption in the dying process.

Description

technical field [0001] The invention relates to a processing method for low-temperature dyeing of wool fibers, more particularly to a process for dyeing wool with acid dyes or reactive dyes. The invention belongs to the technical field of textile dyeing and finishing. Background technique [0002] The dyeing of wool fibers, including the dyeing of wool loose wool, wool tops, wool yarn, and wool fabrics, generally uses wool acid dyes or wool reactive dyes in the production process. The dyeing rate of wool reactive dyes on wool fibers adopts high temperature process, and the dyeing temperature is as high as 98°C-100°C, otherwise, the color yield of wool acid dyes or wool reactive dyes on wool fibers will be reduced, and the color will become lighter. The utilization rate of the dyestuff decreases, and the chromaticity of the dyeing wastewater is large. Its disadvantages are: high energy consumption, and high temperature and long-term treatment of wool fiber in the dyeing pro...

AI Technical Summary

Problems solved by technology

Its disadvantages are: high energy consumption, and high temperature and long-term treatment of wool fiber in the dyeing process (such as 60min-90min at 98°C-100°C) is easy to damage the wool fiber, such as weight loss of wool, reduction of carding output, short fiber increase in fiber physical and mechanical properties, fiber yellowing, rough handle, etc., resulting in a decline in the quality of wool products

Although this kind of method can reduce the wool dyeing temperature, it is difficult to have a technical market due to the high cost of solvents, strong corrosion, high toxicity, and serious environmental pollution.

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