Method for efficiently stripping fluorescent bleaching and dyeing dyestuff

Abstract

The invention relates to a method for efficiently stripping a fluorescent bleaching and dyeing dyestuff, belonging to the technical field of textile printing, dyeing and stripping. The dyestuff provided by the invention comprises a stripped fabric and a Doristrip W compound strippant, and is characterized in that the liquor ratio owf of a Doristrip W compound is 3-8%, the pH value is 4-7, the bath ratio is 10-20, the stripping temperature id 50-120 DEG C, and a dipping method is adopted; and stripping and dipping are carried out for 30-60 minutes, sodium thiosulfate or vat powder are used for dechlorinating, and stripping is carried out according to the following technical process: stripping the stripped fabric by utilizing the Doristrip W compound strippant; dechlorinating with sodium thiosulfate or vat powder; fully washing with water; and drying. The dyestuff can be used for thoroughly stripping the brightener and dyestuff on textile fabrics, and the defects such as residue and uneven dye can be prevented, thus the problem that dyed products have blemishes can be solved through stripping and redying; and in addition, when buy textile stock is remade, the effect of remaking the buy textile stock into a new product can be achieved.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing stripping, and in particular relates to a method for stripping fluorescent whitening and dyeing dyes. Background technique [0002] Quality defects are inevitable in the actual textile printing and dyeing production, especially whitening products, products dyed with emerald blue and brilliant blue macromolecular structural dyes, such defects include unintentional staining and color difference, color traces and stripes In addition, there are also problems such as the renovation of textile dead stock products. The methods to solve the above problems usually include: [0003] (1) Reduce the grade and sell at a discount, especially products contaminated with whitening agents; [0004] (2) Light-colored fabrics are dyed and then dyed into dark colors, especially cotton vat dyes; [0005] (3) Use color correction agents to improve level dyeing, polyester disperse dyeing and acrylic...

AI Technical Summary

Problems solved by technology

Complete stripping can usually be done by boiling the substance to be stripped in a bath of alkali and sodium hydrosulfite for 30 minutes (soda ash is better when dealing with viscose), and then fully washed with water. Then cold bleaching in sodium hypochlorite solution, the whole stripping process is very tedious and complicated

[0009] In February 2007, Ji Huijun and others discussed the self-made stripping system JF's dispersion of azo and anthraquinone in the paper "Research on Reduction and Cleaning of Disperse Dyes Dyeing Polyester Fabrics" in the "Printing and Dyeing Auxiliaries" magazine in February 2007. The reductive cleaning effect of polyester needles after dyeing is better than the traditional hydrosulfite and caustic soda stripping methods, but it still cannot be completely stripped off, and it is only lower than the original color depth.

[0010] Wang Yan and others published the article "Research on NDA of Color Stripping System" in the Journal of Knitting Industry in March 2006. Cotton knitted fabrics dyed with reactive dyes and vat dyes and polyester knitted fabrics dyed with disperse dyes were treated with self-made stripping system NDA. , the acrylic knitted fabric dyed with cationic dyes was used for stripping research. The research shows that the stripping effect of NDA is better than that of the traditional insurance powder stripping process, but the test results still have a considerable amount of dye residue, which cannot be completely stripped.