Vegetable dye digital printing ink and preparing method thereof

Abstract

The invention relates to a vegetable dye digital printing ink. The vegetable dye digital printing ink is prepared from, by mass, 10-18 parts of vegetable dye, 8-20 parts of viscosity modifier, 4-15 parts of cosolvent, 0.4-3 parts of surface tension modifier, 1-4 parts of pH modifier, 5-10 parts of wetting agent, 0.5-1.2 parts of bactericide, 2-5 parts of fixer, 1-5 parts of antioxidant, 1-5 parts of mildew preventive and 100-500 parts of deionized water. Red-brown pigment extracted from the green natural plant radix isatidis is taken as the vegetable dye to replace synthetic pigment normally used in existing digital printing ink, and the environment pollution problem and the health problem caused by synthetic pigment are solved; furthermore, by the adoption of the digital printing ink, fabric with ideal color fastness can still be obtained without conducting starching pretreatment on fabric before digital jet printing, and then printing and dyeing processes are simplified and production cost is reduced.

Description

Technical field [0001] The present invention involves a plant dye digital printing ink and its preparation method, which belongs to the field of digital printing technology. Background technique [0002] Dyes are substances that make fiber and other materials coloring. They directly contact people's skin during use. The commonly used synthetic dyes often contain carcinogenic substances, which not only seriously pollutes the environment, but also makes it directly wearing to wear directly.It is harmed by the producer or producer.Plant dye dyeing is mainly used to dye the bark, leaves, roots, fruits, flowers, stems and other pigments.From the perspective of the dyeing process of plant dyes, some natural plant pigments have better solubility to water. The dye solution can be directly fixed on the fabric.fixed.There are also some fabric pigments insoluble in water, and they need to use their solutions to acid and alkaline solutions differently to fiber.Plant dyes and its process are ...

AI Technical Summary

Problems solved by technology

[0004] In the current market, the dyes used in dye-based inks are basically synthetic dyes, which have disadvantages such as unstable color development, color fastness, affecting equipment life, and product environmental protection. Today, people are increasingly pursuing a healthy life. The development of high-performance, high-fastness and water-based environmentally friendly inks is the main trend in the development of current digital inkjet printing inks

[0005] On the other hand, digital printing accurately prints ink onto the surface of the fabric in a non-contact manner, so the color fastness is relatively low. Therefore, in the prior art, before digital printing of the fabric, it is necessary to pre-sizing the fabric. Treatment to help improve the fixation rate and color fastness of vegetable dyes

But this will increase the process of digital printing, printing and dyeing