Method for dyeing green by vegetable dye through one-bath process

Abstract

The invention discloses a method for dyeing green through a vegetable dye one-bath process, and belongs to the technical field of vegetable dye dyeing. Comprising the following steps: preparation of a plant indigo leuco body solution, preparation of a plant indigo leuco acid solution, preparation of a color matching plant dye solution, preparation of a plant dye green dyeing solution, and a plant dye one-bath method green dyeing process. The method for dyeing green by the vegetable dye through the one-bath process is simple in dyeing process, no petrochemical synthetic auxiliary agent is added in the whole process, and the natural and environment-friendly characteristics of vegetable dye are met; the method can be applied to natural fibers such as cotton, hemp, silk, wool and the like or regenerated cellulose fibers and regenerated protein fibers such as viscose, modal, lyocell, soybean protein, milk protein and the like, and is uniform in color, high in color fastness, good in reproducibility, good in production quality controllability and suitable for industrial application.

Description

technical field [0001] The invention relates to a one-bath method for dyeing green with vegetable dyes, and belongs to the technical field of dyeing and finishing in the printing and dyeing industry. Background technique [0002] Vegetable dyes are natural coloring substances extracted from roots, stems, leaves, flowers, fruits, etc. of plants in nature. They are suitable for natural fibers such as silk, wool, cotton, and hemp, or recycled fibers such as Lyocell, Modal, and milk protein fibers. Dyeing of vegan fiber and regenerated protein fiber textiles has the characteristics of wide sources, good compatibility with the environment, biodegradability, and renewable raw materials. It not only has minimal harm to the environment and human body, but also has functional properties, such as anti-oxidation, Antibacterial, anti-ultraviolet, etc., and the color of the dyed fabric is natural, soft and elegant, so it is favored by modern consumers. [0003] my country is one of the ...

AI Technical Summary

Problems solved by technology

In the Chinese invention patent with the application number 202011087300.X and titled "Green Lyocell fabric dyed with plant dye rosemary and its preparation method", a method of dyeing green with modified rosemary plant dye is disclosed. The method of lyocell, wherein the preparation method of the modified rosemary plant dye is: in the aqueous solution, add rosemary extract, 5wt% formaldehyde aqueous solution and 1-amino-2-sulfate ester synthesized by 3 steps Ethylsulfone ethane is prepared by adjusting the pH with caustic soda solution, reacting at 50-60°C for 30-60 minutes, and then spray-drying. Although the dyeing does not require the addition of mordants, the modification process of plant dyes is cumbersome and uses formaldehyde, Synthetic dye intermediates, contrary to the original intention of using vegetable dyes, make them lose their true natural characteristics

[0006] The second is to first use plant indigo to dye blue, after oxidized water washing, and then over-dye with yellow plant dye to get green: this method can be dyed green in various shades, shades and grayscales, but the process is cumbersome and reproducible. poor

This method has a simple process and good reproducibility, but gardenia blue basically does not dye cellulose fibers, and this method is only suitable for protein fiber textiles such as silk, and the scope of application is narrow; secondly, gardenia yellow is a direct plant dye , the color fastness of the dyed textile is poor

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