Water-based gloss oil substituting UV gloss oil

Abstract

The invention discloses water-base gloss oil in place of UV gloss oil, in particular to the water base gloss oil in place of the UV gloss oil in the process of gravure printing, flexography printing and offset printing for the lacquer coating. The invention adopts the technical proposal that: the water-base gloss oil is prepared by the raw materials in weight percentage as follows: water-borne acrylic emulsion 63 to 98.5 percent, wet 0.2 to 2 percent, defoamer 0.1 to 2 percent, slipping agent 0.2 to 10 percent, cross-linking agent 0 to 8 percent, proplylene glycol methyl ether 1 to 2 percent, ethanol 0 to 8 percent, and water 0 to 5 percent. The invention has the advantages of even film forming, excellent desiccation performance, realized glossiness for the UV gloss oil, environment protection, safety, and bright application prospect in the market, and is widely used to replace the UV (ultraviolet curing) gloss oil in the printing industry.

Description

technical field [0001] The invention relates to a water-based varnish replacing UV varnish, in particular to a water-based varnish which can replace UV varnish required in the coating process of gravure printing, flexo printing and offset printing. Background technique [0002] Since the 1990s, UV varnish (ultraviolet light curing) varnish has been used in the printing industry, especially for higher-grade paper, due to its low VOC content, less negative impact on the environment, fast curing speed, and high film-forming gloss. The printing industry is rapidly forming an application market. However, UV varnish is extremely irritating during use, and the acrylic monomers used and the UV light source required for curing are extremely harmful to the human body. [0003] Water-based varnish uses water as the main solvent, and in most cases uses acrylic polymer as the resin. The biggest advantage of water-based varnish lies in its environmental protection, health, and safety. It...

AI Technical Summary

Problems solved by technology

[0004] The solid content of traditional water-based varnish generally does not exceed 60%, and the curing method adopts heating and drying; the film-forming performance of the resin is poor

Due to the large latent heat of evaporation of water, slow drying, and poor resin film-forming properties, printing and coating must use a plate roller with a higher screen line (ie, a shallow plate) to dry completely and print flat. The amount of transfer coating is very small, so that the gloss of printed matter using water-based varnish is much lower than that of printed matter using UV varnish. On the same substrate, the gloss of UV varnish 80 and water-based varnish can only reach 50

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