Quickly drying ink for ink-jet printer

Abstract

A quickly dried ink for ink-jet printer is prepared from dye or pigment (0.1-20 wt.%), oligomer and / or polymer (0.01-2 wt.%), short-chain alcohol, solvent (0.1-40 wt.%), buffering solution (0.1-10 wt.%), antiseptic (0.05-1 wt.%) and deionized water. Its advantage is instantaneous exsiccation.

Description

technical field [0001] The invention relates to a quick-drying ink for an inkjet printer, in particular to a quick-drying ink in which a specific proportion of short-chain alcohols, oligomers and / or polymers is added to the ink composition. Background technique [0002] The operating principle of the thermal bubble printer is to use the corresponding tiny heating element for each nozzle hole on the inkjet head, and through the response of the electronic signal, a current is generated to pass through the heating resistor, which fills the ink chamber in a very short time. The ink is heated to boiling in an instant and bubbles are generated. At this time, the ink is immediately pushed by the rapidly expanding bubbles and ejected from the nozzle hole. With the help of the lateral displacement of the inkjet head and the scrolling of the printer roller, the data is printed; The ink cavity on the micro-heating plate is automatically replenished by capillary action through the ink s...

AI Technical Summary

Problems solved by technology

For example, in order to allow the water-based ink to dry quickly on the material (such as plain paper) during printing to avoid ink smudges during fast printing of inkjet printers, alcohols are usually added to the ink composition as a Penetrating agent, while the existing alcohol-containing ink compositions use more alcohols to achieve a quick-drying effect. At this time, the ink must rely on evaporation as a quick-drying mechanism, so the alcohols must be limited to those with high vapor pressure. Alcohols, in order to evaporate in an instant, but high vapor pressure alcohols will cause flocculation of the dye dispersion, and easy to produce crusting (crusting) to cause nozzle blockage; moreover, alcohols are used as penetrants, because alcohols are mostly It has low viscosity and low surface tension, so the use of a large amount of alcohol will speed up the penetration of the ink into the paper, but the diffusion rate will also increase, resulting in rough edges and blurring, and in the case of excessive penetration. , will also cause the printed image to be distorted