Dye liquor preparation method capable of improving first-time success rate of cold pad-batch dyeing

Abstract

The invention provides a dye liquor preparation method capable of improving the first-time success rate of cold pad-batch dyeing, which belongs to a dye liquor preparation method for use in printing and dyeing production. The method comprises: a, preparing mixed alkaline solution and dye solution respectively, wherein the mixed alkaline solution is prepared by adding water into a material mixing tank, then adding aqueous solution of sodium silicate and sodium hydroxide are added into the water, stirring the mixture uniformly and the dye solution is prepared by adding water in the dye solution mixing tank, then adding penetrant and urea into the water, adding a reactive dye and stirring the mixture uniformly; and b, delivering the mixed alkaline solution and the dye solution to a chassis by using a proportioning pump to mix the mixed alkaline solution and the dye solution to obtain the dye liquor, wherein in mixing, the volume ratio of the dye solution to the mixed alkaline solution is 4:1. The dye liquor preparation method solves the dye hydrolysis problem of pre-mixing by preparing and mixing the mixed alkaline solution and the dye solution separately, improves the success rate of first-time samples and dye utilization rate and saves production cost.

Description

technical field [0001] The invention relates to a method for preparing dye liquor in printing and dyeing production, in particular to a method for preparing dye liquor for cold pad-batch dyeing. Background technique [0002] Cold pad-batch dyeing with reactive dyes is a semi-continuous production method, which can meet the dyeing requirements of various cellulose fiber fabrics, and can be applied to the dyeing of cellulose fiber components of blended fabrics. Its advantages are less investment in equipment and strong mobility. It is not only suitable for large-scale production, but also suitable for small-batch and multi-variety production. Especially in small-batch production, it is more economical, with low cost of additives, low water consumption and energy consumption, and less sewage. And the dye fixation rate is high, there is no swimming phenomenon of dye, the color difference between left, middle and right is easy to control, the color difference between front and ba...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this cold pad-batch dyeing process is that when preparing the dye solution, the pre-mixing of the dye solution and the mixed lye will cause the reactive dye to be hydrolyzed under alkaline conditions, which will affect the improvement of the success rate of a sample and the before and after. The control of color difference will cause waste of alkali agent and increase production cost