Weak acid washing technology of cellulose fiber fabrics

Abstract

The invention discloses a weak acid washing technology of cellulose fiber fabrics. The technology comprises four procedures of acid neutralization, conventional heat washing, weak-acid high-temperature washing, and drying and cropping, wherein the weak-acid high-temperature washing procedure can be finished according to a washing lattice which reversely refluxes in the advancing direction of the cellulose fiber fabrics on the basis of more than three liquid levels; an acid washing lattice of which pH value is adjusted by glacial acetic acid exists in each washing lattice; the pH of the acid washing lattice is 5-6; the acid washing lattice is communicated with at least one washing lattice a at one side of the advancing direction of the cellulose fiber fabrics; meanwhile, the acid washing lattice is also communicated with at least one washing lattice b at the other side; the cellulose fiber fabrics enter the acid washing lattice to wash after being firstly washed by the washing lattice b when the weak-acid high-temperature washing procedure is carried out, and finally enter the drying and cropping procedure after being washed by the washing lattice a; in addition, the washing temperatures of the washing lattice a, the acid washing lattice and the washing lattice b are closer to consistency, and are 90-98 DEG C. By adopting the washing technology disclosed by the invention, the pH value of a cloth cover is stable; the weak acid washing technology does not generate aberration, and is good in color fastness after washing, and high in washing efficiency.

Description

technical field [0001] The invention relates to a weakly acidic water washing process for cellulose fiber fabrics, belonging to the technical field of textile dyeing and finishing. Background technique [0002] For cellulose fiber fabrics, the reactive printing process is generally used. After reactive printing, it must be steamed and then washed with water to remove floating colors and pastes. Most of the traditional washing process is carried out under alkaline conditions. Add acid and normal temperature padding in the first independent unit washing compartment. Due to the short soaking time, low temperature and insufficient penetration, the pH value of the cloth surface is unstable, and some colors are sensitive to pH. The value is more sensitive, because the instability of pH value causes color difference. In the process of high-temperature alkaline washing, some reactive dyes containing vinyl sulfone are easy to hydrolyze, the floating color is easy to stain the white ...

AI Technical Summary

Problems solved by technology

Most of the traditional washing process is carried out under alkaline conditions. Add acid and normal temperature padding in the first independent unit washing compartment. Due to the short soaking time, low temperature and insufficient penetration, the pH value of the cloth surface is unstable, and some colors are sensitive to pH. The value is more sensitive, because the instability of the pH value causes color difference

In the process of high-temperature alkaline washing, some reactive dyes containing vinyl sulfone are easy to hydrolyze, the floating color is easy to stain the white background, the paste of sodium alginate is difficult to remove, and the hand feeling is not good

Although the full boiling washing process has a good effect on removing floating color after reactive printing of cellulose fiber fabrics in recent years, it has high requirements for printing dyes, and some commonly used reactive dyes containing vinyl sulfone active groups are not suitable. It is also difficult to stabilize the pH value of the product. In the subsequent finishing process, acidic additives should be added to adjust the pH, because the temperature and time during impregnation are low and the time is short, which also causes pH instability and color difference.

For some deep-color patterns, the traditional process needs to be washed twice or more times, which wastes water, electricity, and steam, and the efficiency is low and the effect is not good.

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