Water-based ultraviolet dry plastics printing ink

Abstract

The invention provides water-based ultraviolet dry plastics printing ink, belongs to the field of printing ink, and aims to solve the problem that the ultraviolet cured ink can use water and ethanol as solvents as well as diluents. The water-based ultraviolet dry plastics printing ink comprises the following components in part by weight: 100 to 300 parts of prepolymers, 15 to 50 parts of photoinitiator, 10 to 30 parts of surface active agent, 70 to 150 parts of dye, 60 to 200 parts of water and 40 to 100 parts of ethanol, wherein the prepolymers are water soluble ultraviolet cured resin, such as waterborne epoxy acrylic acid resin, waterborne ultraviolet cured acrylic acid treating polyacrylic acid resin or waterborne polyurethane acrylate. The water-based ultraviolet dry plastics printing ink also comprises one, two or all of three auxiliary agents of a defoaming agent, a flatting agent and a polymerization inhibitor, wherein the average weight parts of the three auxiliary agents are 3 to 17 respectively. The water-based ultraviolet dry plastics printing ink has the advantages of quick drying speed, convenient adjustment of the ink viscosity, simplified dustproof operations, convenient use, good printing quality, easy obtaining of extremely thin ink films, safety, and environmental protection, and can meet the printing activity of plastic printed products.

Description

technical field [0001] The invention belongs to the field of printing ink and relates to a water-based ultraviolet drying plastic printing ink. Background technique [0002] In the prior art, plastic printing inks usually use oil-soluble UV curable inks—hereinafter referred to as UV curable inks. The outstanding advantages of this UV curable ink are environmental protection and fast drying and curing speed. The fundamental reason for environmental protection is that it is not easy to use in inks. Volatile organic solvent components are used to adjust ink viscosity, but reactive diluents (ie reactive monomers) are used to adjust ink viscosity, and the volatile organic compound components in reactive diluents are relatively low, and UV curing is used, so Compared with ordinary solvent-based inks, its environmental protection advantages are very prominent. At the same time, due to the use of ultraviolet curing, the drying speed of the ink film printed on the surface of the subs...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, plastic printing inks usually use oil-soluble UV curable inks—hereinafter referred to as UV curable inks. The outstanding advantages of this UV curable ink are environmental protection and fast drying and curing speed. The fundamental reason for environmental protection is that it is not easy to use in inks. Volatile organic solvent components are used to adjust ink viscosity, but reactive diluents (ie reactive monomers) are used to adjust ink viscosity, and the volatile organic compound components in reactive diluents are relatively low, and UV curing is used, so Compared with ordinary solvent-based inks, its environmental protection advantages are very prominent. At the same time, due to the use of ultraviolet curing, the drying speed of the ink film printed on the surface of the substrate is very fast. The disadvantage is that although compared with ordinary solvent-based inks, it is environmentally friendly. The advantages are very prominent, but after all, organic compounds are still used, and the reactive diluent has a strong smell, which has a certain stimulating effect on the human body and is very easy to cause skin allergies; the use of reactive diluents to adjust ink viscosity has certain limitations. If the amount of diluent added is small, the viscosity of the ink is not easy to decrease, resulting in a thick ink film during ink printing. Because there is no solvent volatilization during drying, there is no possibility of ink film thinning, so ink overprinting will cause dots in multi-color printing. Increase the hue distortion; if a sufficient amount of reactive diluent is added, although the viscosity of the ink can be reduced, but the total amount of volatile organic compound emissions will increase due to the increase in the total amount of reactive diluent, which will further affect the ink. Therefore, adjusting the viscosity of UV-curable ink with reactive diluent has insurmountable limitations, and affects the application of the ink itself; at the same time, the corresponding equipment and containers need to be cleaned with organic solvents, which not only pollutes seriously, but also Great fire hazard;