Dyeing process for dyeing different colors for blended fabric in one dyeing bath by using reactive dyes used for cotton

Abstract

The invention relates to a dyeing process for dyeing different colors for blended fabric in one dyeing bath by using reactive dyes used for cotton, which uses the principle that, aiming at the reactive dyes used for cotton, different fibers of the blended fabric have different dyeing rates in the same dyeing bath, thereby generating different color effects. Under the condition of room temperature,by the steps of adding a leveling agent, adding reactive dyes used for cotton, selecting samples, adding Glauber's salt, and increasing the temperature and adding soda for fixation, and by adopting the reasonable blending scheme, time intervals and temperature setting, the dyes form stable chemical bonds on different materials of the blended fabric for fixation, and the use of the soda improves the leveling property, the reproducibility and the dye yield of dyeing, thus the fabric achieves excellent effects. The method has simple processes, reduces the consumption of energy sources and the discharge amount of waste water, is favorable for environment protection, has vivid dyed color, less loose color and good fastness, and saves the production cost.

Description

technical field [0001] The invention relates to a dyeing process of blended fabrics, in particular to a one-bath multi-color dyeing process for blended fabrics by utilizing reactive cotton dyes. Background technique [0002] The dyeing of textiles is divided into two processes: yarn-dyed and piece-dyed. Piece-dyed is to weave products from raw material yarn of natural color and then go through scouring and dyeing-post-processing-dehydration-drying to complete the four processes, while yarn-dyed The warp yarn used must be boiled yarn - washing and dyeing - post treatment - dehydration - sizing - dehydration - drying - winding - section warping... desizing - post treatment - dehydration ——Drying and other 13 processes. The shorter the piece dyeing process, the fewer equipment procedures, shorter processing time, less electricity, water, steam, and labor, so the profit is high. However, piece dyeing can only dye a single color, while yarn-dyed weaving can present colorful and ...

AI Technical Summary

Problems solved by technology

Although the amino acids in soybean protein fiber have a variety of polar groups, they are distributed in the shape of sea islands in the fiber, surrounded by polyvinyl alcohol, and the polyvinyl alcohol fiber is blocked by formaldehyde to form insoluble aldehyde groups during synthesis. Therefore, the dyeability is not as good as that of cotton fiber and regenerated fiber, but the amino group, hydroxyl group, cyano group and insoluble acetal group contained in soybean protein fiber can still be dyed by direct, reactive, acidic, neutral and disperse dyes; but its The dye uptake rate is more than twice that of soybean fiber due to the swelling space of regenerated cellulose fiber, so the dye adsorption rate is higher than that of soybean protein fiber, so the obtained color is darker.