Liquid multi-dyeing auxiliary agent and using method thereof

Abstract

The invention discloses a liquid multi-dyeing auxiliary agent and a using method thereof. The liquid multi-dyeing auxiliary agent is an aqueous solution of flaky sodium hydroxide, a chelating agent and sodium hexametaphosphate, including 0.5-1.5 parts of sodium hydroxide, 0.2-0.5 part of chelating agent and 0.2-1 part of sodium hexametaphosphate in part by mass; a ratio of the total mass of the sodium hydroxide, the chelating agent and the sodium hexametaphosphate to the mass of water is 2:50; the pH value of the liquid multi-dyeing auxiliary agent is 2g / L:8.5 plus or minus 1. The liquid multi-dyeing auxiliary agent can greatly reduce the using amount of conventional sodium carbonate, saves energy consumption and greatly reduces the workload; the liquid multi-dyeing auxiliary agent does not cause air pollution in the printing and dyeing process, and discharged wastewater can be easily treated; the liquid multi-dyeing auxiliary agent can prevent decline in strength of dyed and bleached fabric; the liquid multi-dyeing auxiliary agent is good in level dyeing property and can reduce the production cost.

Description

technical field [0001] The invention relates to the technical field of textile dyeing, in particular to a liquid multi-dyeing auxiliary agent and a method for using the same. Background technique [0002] In previous printing and dyeing operations, soda ash was often used as an auxiliary agent in textile dyeing. However, soda ash only plays a role in promoting dyeing during the dyeing process and is not consumed by itself. This increases the follow-up work virtually and increases the intensity of sewage treatment. Large, now many dyeing factories are limited by sewage discharge; the time and amount of soda ash added will cause vat difference, color flower and unclear washing, and easy to form alkali spots. It takes about 60-70 kg to dye a vat of dark cloth The cost of soda ash is too high, and when it is added to the dye vat at the same time, it is easy to block the container with a large amount of crystallization, which is also not conducive to the safety in production and ...

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Problems solved by technology

[0004] However, although the substitute alkalis on the market have the above-mentioned advantages, there are still some problems in the process of use. The substitute alkalis have obvious selectivity to the color fixing effect of reactive dyes with different structures; The highest color fixation rate is 5%-10% lower than that of anhydrous sodium carbonate as the alkali agent. The dye uptake rate of some dyes is not stable, the dyeing shade deviates from the soda ash dyeing, and contains a large amount of color difference. The main problem is that the fixation rate of the substitute base and the deviation from the soda ash hue, especially the depth of red coffee and purple are not as good as that of soda ash, the difference between the hue and soda ash is too large, and the effect is not ideal; at the same time, the calcium hydroxide in the substitute base is Calcium precipitates are easy to form in the dyeing vat during use, which is difficult to remove, which greatly affects the quality of subsequent printing and dyeing

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