LED four-color printing ink used for intaglio printing, and preparation method thereof

Abstract

The invention discloses a LED four-color printing ink used for intaglio printing, and a preparation method thereof. The LED four-color printing ink used for intaglio printing comprises, by weight, 8 to 10% of a pigment, 25 to 30% of a resin binder, 50 to 55% of an acrylate monomer, 5 to 10% of a photoinitiator, 1 to 1.5% of a wetting dispersant, 3 to 5% of a filling material, and 0.3 to 0.8% of aleveling agent. The LED four-color printing ink used for intaglio printing is bright in curing ink layer color, rich in color, clear in lines, is excellent in ink layer surface levelability, and is high in glossiness, and is capable of realizing continuous printing without shutdown.

Description

【Technical field】 [0001] The invention belongs to the technical field of printing inks, in particular to a gravure-printed LED four-color ink and a preparation method thereof. 【Background technique】 [0002] With the development of society and economy, people have higher and higher requirements for energy conservation and environmental protection. In the past, some backward enterprises and related projects that had a huge impact on environmental protection have been greatly challenged. In the past two years, environmental protection supervision has gradually shut down many polluting Enterprises, and our gravure printing is the first polluting industry, because before that, a large number of solvent-based gravure inks were used in production, which contains a large number of volatile solvents, such as toluene, formaldehyde, methanol and other toxic and harmful gas. [0003] Traditional solvent-based gravure inks are generally composed of resins, pigments, solvents, additives...

AI Technical Summary

Problems solved by technology

[0005] The printing speed of the traditional solvent gravure four-color ink is 180-200m / min, the energy of the infrared oven used is not less than 70KW, the UV ink generally needs 1 second, and the UV curing energy needs about 24KW; although UV curing technology has begun to be applied in the gravure printing industry But because about 45% of the energy emitted by the UV mercury lamp is UV light, and the other about 55% is long-wave light, these long-wave light carry a lot of heat, which will cause the surface of the irradiated object to be heated and deformed, and produce certain Yellowing, especially gravure printing substrates that use a large number of easily deformable films, such as PVC film, OPP film, etc., will easily cause film breakage after being exposed to UV light, which is absolutely not allowed in the continuous printing gravure industry. Therefore, traditional UV gravure inks have been difficult to promote. At present, some technicians in the industry are working hard to apply the new low-energy single-band LED technology to the gravure printing industry. However, due to the extremely low viscosity of gravure ink, the printing speed is extremely fast. , the diversification of printing materials results in poor substrate adhesion, insufficient surface flexibility or hardness, especially in order to reduce the ink viscosity without adding a solvent, a large amount of monomer needs to be added, the resin content is low and the crosslinking density of the ink layer is very high Difficult to improve, so the drying speed, adhesion, flexibility, chemical resistance and other requirements of the LED gravure ink layer on the surface of the substrate are difficult to meet the requirements

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