Acid dye and gravure ink as well as preparation method and application of gravure ink

Abstract

The invention relates to the dyeing industry, and in particular relates to an acid dye with an improved dye structure and excellent color fastness to washing. The invention relates to composition and a preparation method of acid dye gravure ink containing an acid agent, and relates to composition and a preparation method of the acid agent necessary for the temporary use of the acid dye gravure ink. The invention also relates to a gravure printing process capable of directly executing gravure printing, drying and color fixation through steam for protein fiber fabric and nylon fabric without rolling the acid agent. According to the invention, the dye ink printing process flow can be greatly shortened, a great amount of transfer printing paper which is coated with a special isolation agent can be saved, and the dye ink printing production cost can be greatly reduced; meanwhile, the color layer of the printing patterns is variable and rich, the dye color fixing rate is high, less flooding exists in the water washing process, the emission of the waste water is reduced, and the tarnishing of the dye without being color fixed on the printed fabric can be reduced.

Description

technical field [0001] The invention relates to the printing and dyeing industry, and belongs to the field of direct gravure printing on protein fiber fabrics and nylon fabrics by using acid dye gravure printing ink. It specifically relates to the use of an acid dye with excellent washing fastness obtained by improving the dye structure; it relates to the composition and preparation method of an acid dye gravure ink containing an acid agent; it relates to an acid dye gravure ink for temporary use. The composition and preparation method of the acid agent that must be added; also relates to the gravure printing process in which protein fiber fabrics and nylon fabrics can be directly gravure printed, dried, and steamed without being treated with an acid agent. Background technique [0002] At present, the methods of printing textiles with dyes are mainly divided into three categories in the printing and dyeing industry, one is flat screen printing or rotary screen printing with...

AI Technical Summary

Problems solved by technology

[0003] Dye color paste flat screen printing or rotary screen printing is a traditional printing method, which has the advantages of short process flow and low production and processing costs, but there are also problems that the color level of the printed pattern is not rich, and some dyes have a low color fixation rate. , there are many floating colors in the washing process, and they enter the washing solution in large quantities during washing, causing the waste water discharge to exceed the standard. Disadvantages such as quality problems

[0004] Dye ink transfer printing is a novel printing method. At present, it mainly includes thermal transfer printing of disperse dyes on polyester fabrics and nylon fabrics and cold transfer printing of reactive dyes on cotton fabrics. Less energy consumption, higher dye fixation rate, less floating color in the washing process, can reduce waste water discharge, and at the same time, the white ground staining of printed textiles by these unfixed dyes is also greatly reduced, thereby reducing the Printed textiles have advantages such as product quality problems, but there are also long technological processes, which require the purchase of additional printing machines (such as gravure printing machines), transfer printing devices and other equipment, and have high technical requirements for dyes and supporting auxiliaries. Polyester Fabrics and nylon fabrics have poor sublimation fastness and ironing fastness after thermal transfer printing, and the production and processing costs of cotton fabric cold transfer printing are also high, and a large amount of transfer waste paper will be generated at the same time, resulting in the consumption of a large amount of paper resources and other shortcomings

[0005] Inkjet printing with dye ink is also a novel printing method, theoretically speaking, it can be used for all textiles, they have rich color levels of printing patterns, less energy consumption during dye fixation, higher dye fixation rate, and less floating in the washing process. The color is less, which can reduce the discharge of waste water. At the same time, the white ground staining of these unfixed dyes on printed textiles is also greatly reduced, thereby reducing the product quality problems of printed textiles. However, there are also advantages such as slower printing speed. Slow, unable to carry out large-scale production, only small-batch personalized production, low output, need to purchase relatively expensive inkjet printing printers and other equipment, higher technical requirements for dyes and supporting additives, The price of dye ink used in inkjet printing is also more expensive, and the production and processing cost of dye ink inkjet printing is relatively high.

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