Non-aqueous solvent dyeing method of washing-free reactive dye

Abstract

The invention provides a non-aqueous solvent dyeing method of a washing-free reactive dye. The non-aqueous solvent dyeing method comprises the following steps: mixing pre-treated loose fibers, yarns, fabric or clothes with an reactive dye, a micro-molecular quaternary ammonium salt and a good solvent of the reactive dye, so as to form a mixing system; raising the temperature of the mixing system; adding a bad solvent of the reactive dye into the mixing system before raising the temperature or in a temperature rising process; keeping the heat after raising the temperature to a dyeing temperature, wherein the volume ratio of the good solvent of the reactive dye and the bad solvent of the reactive dye is 1 to (3-30), the ratio of the volume of the good solvent of the reactive dye to the mass of the loose fibers, the yarns, the fabric or the clothes is (0.8-10)mL to 1g, and the mass ratio of the micro-molecular quaternary ammonium salt to the reactive dye is (0.1-0.5) to 1; and then drying and putting into a color fixation solution and carrying out color fixation treatment, wherein the color fixation solution contains a 5-100g / L color fixation agent.

Description

Technical field [0001] The invention belongs to the technical field of textile dyeing and finishing, and relates to a water-free dyeing method of reactive dyes with non-aqueous solvents. Background technique [0002] At present, most reactive dyes are used for dyeing reactive loose fibers, yarns, fabrics or garments. During the dyeing process, due to the hydrolysis of the reactive groups in the water medium, not only a large amount of reactive dyes are wasted, but also a large amount of reactive dyes are required during the dyeing process. Consuming a large amount of water and discharging a large amount of high-color sewage that is difficult to treat has always been a bottleneck for reactive dyes. [0003] In order to avoid the hydrolysis reaction of reactive dyes and improve the utilization of reactive dyes, scientists have long paid attention to and studied the dyeing of reactive dyes in non-aqueous media. The advantage of using non-aqueous medium for dyeing is that react...

AI Technical Summary

Problems solved by technology

However, the reverse micellar dyeing process has the following problems: 1. The amount of surfactant and co-surfactant in the system is relatively large, and the amount of a large amount of surfactant and auxiliary agent will cause a large amount of surface adsorption on the cloth sample during the dyeing process. Active agents and auxiliary agents will also cause difficulties in post-processing, high COD values ​​in soaping wastewater, environmental pollution, and a certain waste of resources; Clothing has high affinity, so the dyeing speed is fast, it is not easy to control, and it is easy to dye flowers; 3. When dyeing, loose fibers, yarns, fabrics or garments must first be padded with a certain concentration of sodium carbonate aqueous solution, and with a certain liquid rate. Dyeing, the water in the system will also cause the hydrolysis of the dye, therefore, its color fixation rate is low

[0010] 1 The dyeing rate is high, and the dyeing speed is too fast, which can easily cause dyeing;

[0011] 2 The electrostatic repulsion between the negative charge (sulfonic acid group) of the reactive dye and the negative charge (hydroxyl anion) on the surface of the fiber prevents the dye from diffusing into the fiber and reduces the penetration;

[0012] 3 Residual unreacted 0.5-5% reactive dyes without soaping or color fixing will reduce the color fastness performance, and soaping consumes a lot of water. The traditional fixing method directly in aqueous solution needs to be soaped to clean the floating color on the surface , otherwise the floating color is easy to dissolve in water, and form a lake with the color fixing agent and adsorb on the fiber again, resulting in the phenomenon of dyeing

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