Ceramic ink-jet printing ink and its use methods

Abstract

The invention relates to a ceramic ink-jet printing ink and its use methods, and concretely relates to a selection method of a ceramic pigment, five formula schemes of the ceramic ink-jet printing ink, and two use methods of the ceramic ink-jet printing ink. A preparation method of the ceramic ink-jet printing ink is optimized, and a printing device is arranged according to the different physical and chemical indexes of the ceramic ink-jet printing ink, so the cost using a ceramic ink-jet technology is reduced.

Description

technical field [0001] The invention relates to an ink-jet ink, in particular to a ceramic ink-jet ink. Background technique [0002] In the world, there is a huge market in the field of printed ceramics; ceramic inkjet printing technology is replacing traditional ceramic printing technology with its huge advantages; the current ceramic inkjet printing technology generally uses ceramic inkjet printing ink in ceramic inkjet On the printing machine, the pattern is printed on the glazed ceramic embryo by inkjet, and the pattern is fixed after firing, and then covered with a layer of transparent glaze; the domestic inkjet printing machine is several million / set, and the imported tens of millions / Taiwan; ceramic inkjet ink is rare because of its high technical difficulty, and the price is extremely high; ceramic inkjet printing technology is monopolized by foreign countries; all these factors affect the popularization of ceramic inkjet printing technology; the key technology ...

AI Technical Summary

Problems solved by technology

[0004] 1. Obvious chromatic aberration: The applicant of the present invention has found that existing ceramic ink-jet printing has no defects in printing patterns, but there is obvious chromatic aberration in ceramic ink-jet printing in the reproduction of oil painting artworks and printed figures. The hue, lightness, and purity of the color are obviously different from those of oil paintings. The color is dark and dull, without luster, especially the dark area is opaque, which seriously affects the effect of the picture.

Analyzing the reason, the colorant of the ceramic inkjet ink is the metal oxide in the inorganic pigment, which is different from the Lab value of the standard chromatogram

[0005] 2. Insufficient storage stability and printing fluency: ceramic inkjet inks exist in the state of colorant particles, which are dispersed in the carrier by dispersants, so it is easy to agglomerate and settle, and it is not easy to store stably. At the same time, it is easy to block the nozzle during printing; The ceramic inkjet printing machine, especially the nozzle is expensive, and the ink is easy to block the nozzle, which will undoubtedly increase the cost of ceramic inkjet printing

According to the existing technical data, the storage stability of ceramic inkjet ink is about two months, which brings difficulties to the preservation and use of ceramic inkjet ink

Analyzing the reasons, the storage stability and printing fluency of ceramic ink are affected by many factors such as raw material selection and production technology. One of the factors is that the particles in ceramic ink are too large; the current ceramic ink is made by refining ceramic colorant and ceramic flux together. It is made into particles with a particle size of more than 800 nanometers; this is not conducive to expanding the selection range of ceramic pigments, and at the same time, the ceramic flux is hard and difficult to make fine particles

[0006] 3. The adhesion between the ceramic inkjet ink and the substrate is insufficient, and the scratch resistance and water resistance of the ceramic inkjet ink are not enough: after the ceramic inkjet ink is printed on the substrate, the carrier in the ink volatilizes, and the colorant precipitates on the substrate. On the surface of the substrate, because the traditional ceramic inkjet ink has no adhesive, the adhesion between the ceramic inkjet ink and the substrate is insufficient, and the scratch resistance of the ceramic inkjet ink is not enough; at the same time, the ceramic colorant in the ceramic ink It has water absorption with ceramic flux, and will absorb water vapor in the air. The substrate on the printed inkjet ceramics and the ceramic ink will fall off due to poor water absorption and swelling. In rainy days, the printed inkjet ceramics are placed on the In the open air, the ceramic substrate and ceramic ink absorb a large amount of water, swell and bond poorly, which will cause damage to the unfired ceramic products after printing

[0007] 4. The brightness of the ceramic inkjet ink is not enough, and it needs to be protected by a transparent flux: the traditional ceramic inkjet ink uses metal oxides as the colorant, the colorant is dark and dull, and has no luster; at the same time, the colorant is directly exposed to the outside, which is easy to It is damaged by scratching and friction, so it is necessary to apply a layer of transparent flux on the inkjet colorant to protect the inkjet ceramic colorant, and at the same time increase the brightness of the ceramic, which increases the cost of ceramic inkjet products

[0008] 5. The existing ceramic inkjet ink lacks a special matching ceramic inkjet printing device: the quality of the current ceramic inkjet ink is often not very good due to the manufacturing materials and manufacturing technology, and it is necessary to obtain the quality of the ceramic inkjet printing machine manufacturer. Certification, which increases the chance of technology monopoly; analysis of the reasons for the poor quality of ceramic inkjet inks is that the physical and chemical indicators of ceramic inkjet inks-surface tension, PH value, and conductivity are easy to meet the standards, but the viscosity often exceeds the standard, causing many Inkjet printing devices cannot print; if the viscosity of ceramic inkjet ink is reduced to suit other inkjet printing devices, ceramic inkjet printing devices can also print ceramic inkjet inks, so that you don't have to buy expensive ceramic inkjet printers and can produce The result that significantly reduces the cost of inkjet printing of ceramics