Method for dyeing natural fiber fabrics with vegetable dyes

Abstract

The invention provides a method for dyeing natural fiber fabric with vegetable dye. According to the dyeing method, the natural vegetable dye prepared from fructus gardenia is adopted to dye the natural fiber fabric into blue, and after the fructus gardenia is subjected to smashing and screening, vegetable oil and pectin removal, purification and concentration, feeding to a macroporous resin column, addition of cellulase and other steps, the natural vegetable dye is obtained; the natural fiber fabric is subjected to pretreatment for removal of surface impurities, sodium periodate is added for oxidation, rare earth or a rare earth derivative is added, the prepared vegetable dye is added, the natural fiber fabric is dyed into blue, lastly the dyed fabric is washed, soaped, rinsed, dewatered, dried and shaped, and the blue cotton fiber fabric is obtained. According to the dyeing method, the natural vegetable dye prepared from fructus gardenia is adopted to dye the natural fiber fabric into blue, the dyeing effect is good, the whole process is easy to control precisely, large-scale production can be carried out, and the dyed natural fiber fabric has a natural antibacterial effect.

Description

technical field [0001] The invention relates to the field of textile dyeing and finishing, in particular to a method for dyeing natural fiber fabrics blue by using natural plant dyes prepared from gardenia fruits. Background technique [0002] At present, most of the printing and dyeing enterprises use chemical dyes, such as reactive dyes, disperse dyes, acid dyes and cationic dyes, etc. These are dyes produced artificially from coal oil as raw materials as intermediates, which have a serious impact on the environment. Moreover, some chemical dyes are irritating and allergic to human skin, which is not conducive to health. [0003] Compared with chemical dyes, natural dyes have natural bright colors and high safety, and some natural dyes also have certain health care functions, which are very popular among people. Vegetable dyes are the dyes with the longest application history and the widest application range among natural dyes. Plant dyes are mainly extracted from plant ...

AI Technical Summary

Problems solved by technology

[0004] In the existing field of plant dyeing, some plant dyes have been known and used by everyone, such as: rhubarb, tea, hematoxylin and pagoda japonica and other plant dyes have been applied in batches. As people's requirements for environmental protection and ecology become more and more Higher, the textile dyeing and finishing industry has already focused on the green production process. Therefore, it is extremely urgent to improve the color spectrum of plant dyes. Blue plays an important role in the color spectrum. At present, natural blue plant dyes are The most commonly used are isatidis and indigo. The active ingredient of isatidis is also called Daqingye. It is a vat dye made through a series of fermentation processes. It is not easy to control in the actual industrial production process; indigo can be used at this stage but It cannot be produced on a large scale; therefore, it is necessary to conduct in-depth research on the method of dyeing textile fabrics with vegetable dyes into blue