Analysis of six performances and properties of digital printing ink
1. Dry powder digital printing ink
The dry powder digital printing ink is a dry powder ink formed by mixing a particulate charging agent with pigment particles to help charge formation and a fusible resin. The negatively charged toner is absorbed by the exposed part to form an image. The toner image transferred to the paper is heated and the resin in the toner melts, and is fixed on the substrate to form the image.
2. Liquid digital printing ink
Liquid digital printing ink is commonly used in inkjet printing, and the type of ink is related to the structure of the inkjet head. The inkjet head can be divided into two types: hot-press type and piezoelectric type, and the piezoelectric type has two types of high precision and low precision. EPS0N nozzles belong to high-precision nozzles Xaar and Spectra nozzles belong to low-precision nozzles. High-precision nozzles mostly use water-based dyes or pigment inks. The latter mostly uses solvent-based pigment inks.
Different from traditional inks. The curing of e-liquid ink on the medium does not depend on the drying time of the ink film. Instead, it encounters a high temperature (130 ° C) blanket immediately curing on the blanket. The ink graphics on the blanket are transferred to paper or other media 100%. on the other hand. The basic material of e-liquid ink is a new type of resin material, and its microscopic shape is polygonal. Under the action of pressure, unlike traditional inks, it is easy to diffuse, but it is solidified immediately after being in close contact with paper or other media to make the printed image clearer.
Electronic liquid ink is divided into water-based ink and oil-based (solvent-based) ink. Water-based ink consists of solvent, colorant, surfactant pH adjuster, drier and necessary additives. For hot-press inkjet printing system, only water-based ink can be used. Drop-on-demand inkjet inks are also usually water-based inks. Oil-based (solvent-based) ink is composed of colorant solvent, dispersed 3, J ~ n other regulators.
3. Solid digital printing ink
Solid-state digital printing inks are mainly used for inkjet printing. In the normal state, the ink is heated when the ink is heated, and the viscosity is reduced and then sprayed onto the surface of the substrate. Solid digital printing ink is composed of colorant, particle charge agent, viscosity control agent and carrier.
4. Electronic ink
Electronic ink is a special ink used for printing and coating on a special substrate material as a display. It is wrapped by microcapsules and its diameter is on the nanometer level. There are many positively charged white particles and negatively charged black particles in the microcapsules, and they are distributed in the transparent liquid in the microcapsules. When the microcapsules are positively charged. Positively charged particles gather on the side facing the observer. And it is displayed in white, when it is negatively charged. Negatively charged black particles gather on the observer's side. It is displayed in black. The position of the particles and the color of the display are controlled by the electric field, which is generated by the high-resolution display array backplane.
5. UV / EB ink
The so-called UV / EB ink is an ink that is cured by ultraviolet light or electron beam energy, and the application of uv / EB ink-type radiation-cured ink in inkjet printing is increasingly widespread. The biggest feature of UV inks in digital printing is good stability. The advantage of curing under uV light can effectively avoid clogging of the print head. Extend the actual life of the print head. But the shortcomings are. Printing with uv / EB ink will result in reduced printing speed. For example, the limitation of ink supply and the speed of a large amount of ink passing through the print head.
At present, Xennla's new XenJetVivide series CMYK pigment uV curing ink has passed Xaar's certification. And use this new ink on Omnidot760 print head.
At present, the research of digital printing inks is in full swing in the world. Various digital printing machine manufacturers such as Canon, HewIettPackard, EPSONScitexXeikon, HPIndigo, etc. have researched and developed digital printing inks adapted to their system characteristics according to the characteristics of their digital printing machines. In addition, other well-known ink manufacturers in the world. Companies such as DIC, Sun Chemical, Flint Group, Sakata InxCorp and others have also begun to get involved in the development and production of digital printing inks. It is believed that with the widespread use of digital printing presses, the research and development of digital printing inks will be more in-depth. New digital printing 5a ink will continue to appear.
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