A kind of reactive dye inkjet printing ink and preparation method thereof

Abstract

The invention relates to active dye ink-jet printing ink and a preparation method thereof. The active dye ink-jet printing ink comprises the following components by mass percent: active dye concentrated solution 25 to 50 percent, humectant 5 to 15 surfactant 0.1 to 3 pH regulator 0.5 to 3 disinfectant 0.1 to 1 water-soluble cosolvent 5 to 10 and deionized water in balancing amount. The active dye ink-jet printing ink is prepared through the following steps: adding the active dye concentrated solution, the humectant, the surfactant, the water-soluble cosolvent, the pH regulator and the disinfectant into the deionized water, stirring and then continuing to stir through an emulsifying machine; still standing; and finally filtering through a filtration film. The active dye concentrated solution (the concentration is greater than 20 percent) is obtained through refining with a two-stage nano-filtration device, so that the purity is very high; and invention is environmental-friendly, and the prepared active dye ink-jet printing ink has the advantages of high printing smoothness, storage stability, pattern printing accuracy and color fastness and is washable.

Description

technical field [0001] The invention belongs to the technical field of inkjet printing, in particular to a reactive dye inkjet printing ink and a preparation method thereof. Background technique [0002] Compared with the traditional printing process, the emerging textile digital inkjet printing technology has the advantages of short cycle, energy saving and emission reduction, and rich colors. This new printing method will bring a revolution to the traditional printing and dyeing technology. Textile inkjet printing technology mainly includes three aspects: inkjet printing equipment, inkjet printing ink and inkjet printing process. The requirements for inkjet printing equipment are: high printing precision, fast speed, good reliability and applicability. Several domestic enterprises have developed ink-jet printing equipment for textiles, which have been sold to domestic and foreign markets. The inkjet printing process is simpler than traditional printing, and generally inc...

AI Technical Summary

Problems solved by technology

Due to the production process of reactive dyes, it contains a large amount of main impurities NaCl, Na 2 SO 4 , and these impurities exist in the form of monovalent and divalent ions in the ink, resulting in too low solubility of the reactive dye in the ink. These ionic impurities will cause the crystallization of the reactive dye in a short time, and the storage stability is very poor. These problems have always plagued the application of domestic commercial-grade reactive dyes in the field of ink-jet printing. Domestic commercial-grade reactive dyes must be purified and further processed in order to produce cost-effective inkjet printing equipment. printing ink

[0004] Domestic and foreign patents CN1786331, CN1202549, CN1202550, CN1202551, US6780229 have published the composition of reactive dye inkjet printing ink one after another. In the disclosed method, reactive dyestuffs are not purified through desalination, and the inkjet printing ink is directly prepared. In fact, the ink will be precipitated. Layer phenomenon, cannot be used for digital inkjet printing of fabrics

U.S. Patent US6015454 announced the use of ultrafiltration and reverse osmosis membrane separation devices to remove inorganic salts in reactive dyes, using 1,2-propanediol and N-methyl-2-pyrrolidone as co-solvents, and the inkjet printing ink prepared is stable in storage The performance and printing fluency are not good, and there are problems such as clogged nozzles

CN101519551 and CN101864195 can only remove monovalent ions in reactive dyes by reverse osmosis, but do not mention the removal method of divalent ions. This method may be applicable to 2 SO 4 reactive dyes, but cannot be applied to high Na 2 SO 4 content of commercial-grade reactive dyes, and the reactive dye solution concentration obtained by this method is too low to directly prepare inkjet printing inks, and the method of collecting reactive dyes by spray drying is too high in energy consumption, which may also cause changes in the molecular structure of reactive dyes

If the reverse osmosis method is used to purify the reactive dye filter cake or dry powder purchased on the market, the content of divalent ions in the reactive dye is too high, so inkjet printing ink with smooth printing and stable storage cannot be obtained.

For the same reason, Liu Lanzhi, Shen Yongjia and others reported that the use of polyamide nanofiltration membrane desalination device can effectively remove NaCl impurities in commercial grade C.I. reactive blue 49, but this method cannot remove a large number of divalent ions in reactive dyes Impurities, so still can not get high quality inkjet printing ink

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