Explanation Of Digital Ink Jet Disperse Printing Process

　　 Digital ink jet printing technology In this paper, the production technology, ink requirements, application precautions, characteristics of domestic high-speed tape type digital ink-jet printing machine and the future development trend of digital ink-jet printing are summarized. Ink jet printing with disperse ink can be divided into two types. The first method is to pretreat the fabric, then ink-jet printing, drying, steaming, washing, drying and setting; the second method is to print the disperse ink on the transfer paper, and then transfer the pattern printed on the transfer paper to the polyester fabric through heat, so as to save the pretreatment and subsequent processing of the fabric.

Digital ink jet pigment printing process. There are two kinds of inkjet printing process using pigment ink. In the first method, the fabric is pretreated, and then inkjet printing, drying, baking or hot pressing fixation are carried out; the second method is to print pigment ink directly on the fabric, and then dry, bake or hot press fixation, thus eliminating the pretreatment of the fabric. The specific production method depends on the characteristics of the ink used and the condition of the fabric. Refer to the product manual of the relevant pigment ink.

Ink for digital ink jet printing. Digital ink jet printing machine At the same time, the ink should be stored in the range of high temperature, high temperature, high temperature and good surface tension; In the nozzle should have good moisture retention performance, so as to avoid blocking the nozzle when the machine stops: the ink sprayed on the fabric should have good fast drying property, so as to avoid unclear contour caused by infiltration. In order to obtain these properties, in addition to adding dyes in the ink, but also to add solubilizer, moisturizer, pH regulator, thickener, mold inhibitor and so on. The dosage of dyestuff is generally 7-15%, the rest are all kinds of additives and deionized water..

The inks used in inkjet printing can be divided into two types: water-soluble dye ink and insoluble pigment ink. It has the advantages of bright color, stable color and high quality. The main colors of the dyes are yellow, magenta, light magenta, cyan, light cyan and black. The properties of the dyes mainly include the hue, strength, brightness, sunlight, water (fading, staining) fastness, compatibility of dye matching, etc. Now in digital ink-jet printing, more dye-based ink types are used, such as reactive dyes, acid dyes, disperse dyes. General natural fibers use reactive dyes and acid dyes: polyester fiber fabrics use disperse dyes, disperse dyes because it is insoluble in water, with the help of dispersant into fine particles dispersed in water.

Reactive, acid and direct dye inks need to be pretreated to improve the fixation rate and printing accuracy. Because these dyes used in ink-jet printing, there will be permeating phenomenon, making the pattern inaccurate. Disperse dye inks are printed on polyester by paper heat transfer, or fabric is pretreated, directly printed and then steamed. In recent years, the major companies have carried out systematic research on reactive dyes for ink jet printing, and continuously launched reactive dye products for ink-jet printing, RT full gamut series of high-purity liquid reactive dye ink combinations.

Now the market is more used by green, magenta, yellow, black, light green, light red, light yellow, light black 8 color ink. The use of 8-color ink can be based on the needs of spray printing excellent wide range, rich performance, delicate level of patterns. The color produced by combined use is accurate, can reach the original color, and can fully meet the needs of production. For example, inkjet printing some characters, landscapes, works of art and so on, you can use light green, light red color combination of color ink. different Dye ink The combination is suitable for different fabrics and patterns.