Ramie fabric and wrinkle-resistant dyeing and finishing process thereof

Abstract

The invention discloses a wrinkle-resistant dyeing and finishing process of a ramie fabric. The process includes the following steps that S1, pretreatment is performed; S2, wrinkle-resistant finishingis performed, wherein the ramie fabric obtained through the pretreatment in the step 1 is immersed in finishing liquid at 45-55 DEG C, the bath ratio is 1:25:35, immersion and rolling are performed twice respectively, the rolling rate is 80-95%, pre-drying is performed at 70-90 DEG C, steaming is performed under humidity at 110-120 DEG C, and drying is performed after water washing at 60-70 DEGC; S3, reactive dyeing is performed, wherein the ramie fabric obtained through wrinkle-resistant finishing in the step 2 is immersed into dyeing liquid formed by reactive dye, the bath ratio is 1:(20-30), the temperature is increased to 40-50 DEG C, heat preservation is performed, dyeing is performed, the temperature is increased to 60-80 DEG C, an alkaline agent is added, heat preservation is performed, the temperature rises to 90-100 DEG C, heat preservation and dyeing are performed, and after the temperature is reduced to room temperature, water washing, soaping and drying are performed insequence. The invention further discloses the ramie fabric. Quaternary ammonium salt of chitosan, oxidized microcrystalline cellulose, metal oxide sol and sodium tartrate cooperate and serve as a wrinkle-resistant finishing solution of the ramie fabric, through cooperation with wet steaming, cross-linking of ramie fibers is effectively promoted, and the wrinkle-resistant performance is improved.

Description

technical field [0001] The invention relates to the technical field of wrinkle-resistant finishing and dyeing of ramie fabrics, in particular to a ramie fabric and its wrinkle-resistant dyeing and finishing process. Background technique [0002] Ramie fabric is a high-grade natural textile fabric, which has the advantages of absorbing sweat and dispersing moisture, being breathable and comfortable, and clearing away sweat. Relatively complete, the degree of polymerization of fiber macromolecules is relatively high, and the force between molecules is relatively large. In the amorphous region of the flax fiber, the macromolecular chains of the flax fiber are loosely arranged, and the number of hydrogen bonds between the basic structural unit and the macromolecules of the fibers is relatively small. Hydrogen bonds are broken and new hydrogen bonds are reformed at new locations. When the external force is removed, due to the blocking effect of newly formed hydrogen bonds, the ...

AI Technical Summary

Problems solved by technology

The defect of poor wrinkle resistance has not been effectively solved

[0003] In the patent CN201610616764.2 previously applied for by the inventor, a reactive dye dyeing and finishing process suitable for ramie fabrics is disclosed. The ramie fabrics are subjected to enzyme desizing treatment, and the ramie fabrics are treated with chitosan quaternary ammonium salt and citric acid. Modified finishing can improve the dyeing rate and color fixation rate of reactive dyes in the reactive dyeing stage, but the combined finishing of chitosan quaternary ammonium salt and citric acid is not ideal for improving the wrinkle resistance of ramie fabrics, and after chitosan quaternary The three carboxyl groups of ammonium salt and citric acid are respectively esterified and cross-linked with the hydroxyl groups on the ramie fiber, introducing anionic groups on the surface of the fiber, increasing the electronegativity of the finished product, increasing the repulsion between the fabric and the dye, and adding the hydrogen bond of the fabric The reduction of the color density of the fabric leads to a decrease in the color difference

In addition, the use of sodium hypophosphite catalyst is likely to cause eutrophication of water bodies

Images