Requirements for reactive dyes for inkjet printing

With the development of digital technology, precise control of the dyeing process with computers can increase production efficiency and yield, reduce production costs, and minimize the pollution of wastewater. Inkjet printing technology is one of the main areas. There are two main technologies: continuous inkjet and drop-on-demand inkjet. Both of these printing techniques have particular requirements for dyes or organic pigments in inks, such as the chemical structure of the dye, the average particle size, the conductivity of the aqueous solution formed, the pH of the dye, the purity of the dye, especially the content of inorganic salts, and the like.

In recent years, major companies have conducted a series of printing studies on reactive dyes for inkjet printing and have recommended a series of reactive dyes for inkjet printing. Sumitomo Corp. of Japan also published many research results and patents on reactive dyes for inkjet printing, and proposed reactive dyes specifically designed for inkjet printing of cotton fiber textiles. These dyes are simple in structure, convenient in synthesis, and capable of performing various properties. Meet the requirements of inkjet printing. At the same time, various companies have also launched reactive dye products for inkjet printing. For example, Stork and Zeneca have jointly developed high-purity Procion P dyes for inkjet printing, and Ciba's Cibacron MI ink series has 8 The varieties are particularly suitable for ink jet printing of piezoelectric and thermal bubble jet technology; DYStar's Jettex R reactive dyes consist of 13 varieties, and Jettex Rink has 9 varieties, both purified and specially processed. dye.