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: 1. carrying out full swelling on loose fibers, yarns, fabric or garments in a water solution of alkaline substances, controlling the take-up rate and drying; 2. mixing the dried loose fibers, yarns, fabric or garments with a reactive dye and a good solvent of the reactive dye to form a mixing system, heating the mixing system, adding a poor solvent of the reactive dye to the mixing system before heating or in the heating process, heating to dyeing temperature and then carrying out heat preservation; and 3. carrying out heat preservation on the loose fibers, yarns, fabric or garments treated in the step 2 in the non-polar or weak-polar poor solvent of the reactive dye containing a cation reagent, drying and thus finishing dyeing. According to the method, the loose fibers, yarns, fabric or garments can be completely dyed or subjected to fixation by the reactive dye, and do not need to be washed and neutralized after being dyed, so that the dyeing cycle is short and the energy consumption is low.

Description

technical field [0001] The invention relates to a dyeing method of reactive dyes, in particular to a non-aqueous solvent dyeing method of no-washing reactive dyes, and belongs to the technical field of textile dyeing and finishing. Background technique [0002] At present, reactive dyes are mostly used in the dyeing of reactive loose fibers, yarns, fabrics or garments. During the dyeing process, due to the hydrolysis of active groups in aqueous media, not only a large amount of reactive dyes are wasted, but also in the dyeing process. Consuming a large amount of water and discharging a large amount of high-color sewage that is difficult to treat are also the bottlenecks that have always existed for reactive dyes. [0003] In order to avoid the hydrolysis reaction of reactive dyes and improve the utilization rate of reactive dyes, scientists have paid attention to and studied the dyeing of reactive dyes in non-aqueous media very early. The advantage of dyeing with non-aqueou...

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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

[0007] Although there have been a large number of literature reports on non-aqueous solvent dyeing of reactive dyes, the fixation rate of reactive dyes is still low, and a large amount of water is still needed to wash away the residual floating on cotton loose fibers, yarns, fabrics or garments after dyeing. color, which also loses the true meaning of non-aqueous solvent dyeing

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