Digital Inkjet Printing Inks and Dyes

I. Introduction Digital Inkjet Printing Inks

Inkjet printing systems can be divided into two types based on different principles. One is the use of CAD/CAM software provided by Sophis, the application of micro-piezoelectric technology inkjet printing machine, the other is the application of heat The principle of pressure printing production of inkjet printing machine, the former applies to reactive dyes, disperse dye printing, the latter applies to acid dye printing. The domestic printing and dyeing factories have purchased several sets of digital inkjet printers, mainly the printing system produced by Japan's MIMAKI company and the A'TEX PRINT TEX-1300/1600 digital inkjet printer produced by Hangzhou Honghua Company. Both are produced using the piezoelectric principle.

Digital inkjet printing technology has been applied in the production process of printing and dyeing plants. Seiren Corporation is the largest fabric printing company in Japan and has established its own inkjet printing production system. Digital printing is produced using reactive dyes, disperse dyes, and acid dyes. Products are already on the market.

Second, digital inkjet printing ink

There are two methods of digital ink jet printing. One is the YMCIC inkjet printing based on high-precision nozzles, that is, dot matrix type; the other is the pre-mixing method, in which the dye is premixed into a certain color and sprayed onto the fabric. When using the YMCK method for printing, in order to obtain high-precision and smooth light-color transition color, you must use high resolution (Mountain p), this requires the fineness of the nozzle is small, while the ink is also very demanding, It is more difficult to increase the ink jet speed, but the number of dyes used is relatively small and the basic color is four colors. The pre-mixing method does not require high precision on the nozzle, 180dP can meet the general requirements, 360dP can get a very fine printing effect, the printing product is close to a printed style, due to the larger diameter of the nozzle, the dye requirements are not high . In the future, digital inkjet printing will be developed in both directions to meet the different requirements of users.

1, YMCK inkjet printing ink

The YMCK method is a widely used printing method. The ink jet printer sold on the market is also mainly designed for this purpose. Since the nozzle diameter of the nozzle is very small, the resolution of the printing is high, and the viscosity, surface tension, and inorganic salt of the ink are high. The content and the fineness of the dye particles are very high. The world's largest dye companies and inkjet printing companies have all developed inkjet printing inks. Ciba Specialty Chemicals has applied for a patent for reactive dye inks for inkjet printing. It will contain monochlorotriterpene and monofluoride. Reactive dyes with active groups such as ethyl hydrazine sulfate are used in digital inkjet printing inks. First, the inorganic salts in dyes are removed by membrane separation methods such as ultrafiltration and reverse osmosis, using 1,2-propanol or N-methyl-2-pyrrolidone, etc. as a dissolution aid, methyl cellulose, ethyl cellulose, or alginate as thickeners, plus human PH buffer and fungicide Ink, printed with a piezo-electric inkjet printer, gave better results. Canon applied for a patent for the preparation of disperse dye ink jet inks. The dye used was C. I. Disperse Yellow 7, 54, 64. 70, 71, 100, 242; C, I. Disperse orange 25, 37, 119; CI disperse red SO, 6O, 65, 146, 239; C. 1. Disperse violet 27 C. 1. Disperse blue 26, 35, 55, 56, 81:1, 91, 366, etc. The process is as follows: The dispersant, the deionized water and the organic solvent are uniformly mixed, a sand mill is placed, and the zirconium beads are added for sanding. After the sanding is finished, the coarse particles are filtered out to prepare a dye dispersion.

The processing method is: adding dyes to deionized water, adding organic solvent such as diethylene glycol, stirring for two hours, and filtering to obtain ink. Viscosity modifiers, surface tension modifiers and optical brighteners may be added as necessary, and the importance of fabric pretreatment is emphasized. The resulting ink can be printed with a thermal foaming inkjet printer.

Pigment-type ink-jet printing inks are also the focus of recent development. Such inks can be used for various fibers and their blended fabrics, do not require pretreatment of fabrics, and can obtain satisfactory various color fastnesses.
At present, there are some ink-jet printing ink series products available, but with incomplete statistics, there are roughly the following products: Cibacron's production of reactive dye inks for cellulose fiber ink-jet printing has nine varieties, namely Cibacron. Yellow MI-100, Golden Yellow MI-20O, Orange MI-3O0, Red MI-400, Red MI-500, Blue MI-6OO Turquoise MI-7O0, Grey MI-8O0, and Black MI-gOO; for silk, wool, and poly There are seven types of acid dye inks for the printing of cool amine fiber, which are the Lanaset Yellow SI-100. Red SI-ZOORed SI-30O. Blue SI-4O0, Turquoise SI-500, Grey SI-600 and Black SI-700; seven types of disperse dye inks used for polyester ink jet transfer printing or direct ink-jet printing, Terasil Yellow TI-IOOO , Orange TI-ZOOO Red TI-3000, Turquoise TI-4000, Blue TI-5000, GreyTI-60O0 and Black TI-7000; There are nine varieties of common pigment inks used for inkjet printing of various textiles, namely IrgaphorYellow TBI. — IOO'Golden Yellow Till-20O, Red TBI-30O, Navy TBI-400, llule TBI-500, Green TBI-600, Grey T13I-7O0, 13lack TBI-80O and Cleanjet CS, where Cleanjet CS is an accessory dedicated Cleaning agents; High-concentration pigment inks are available in seven varieties, Irgaphor Yellow T131-15o HC, Cfolden YelloWTll-25O HC, Red TBI-35O HC, Magenta T13I-38O HC Book Till-55O HC. Gre. n Till-65O HC and Black TI3I-850HC.

There are seven types of inks for silk and nylon inkjet printing produced by DuPont, namely Artistri acid dye yellow, acid dye orange, and acid dye magenta. Acid dyes blue, acid dye blue, acid dye green and acid dye black; pigment inks used in all kinds of textile printing are seven varieties, Arti. Tri pigment yellow, pigment red. Pigment magenta, pigment cyan, pigment green, pigment violet and pigment black.

BASF's disperse dye inks are graded I3afixan, and pigment inks are HehZarin.

2, pre-mixed inkjet ink

For the premixed inkjet printing, since the high resolution is not required, the nozzle can be made relatively coarse, and the requirement for the roundness of the ejected ink droplet is relatively low. Therefore, the requirements for dyes are also low, and most commercially available liquid dyes can be used simply by simple microfiltration. For example, information is provided that satisfactory results can be obtained by using Kayacion liquid reactive dyes made by Nippon Kayaku Co., Ltd. as inks for ink-jet printing using a pre-mixing method. Therefore, using this method for inkjet printing, the cost of the dye is similar to that of ordinary printing.

Source: Textile Printing Network