Ester-soluble polyurethane compound printing ink with high composite strength and preparation method thereof

Abstract

The invention relates to compound printing ink, in particular to ester-soluble polyurethane compound printing ink and a preparation method thereof. The compound printing ink comprises the following components by weight percentage: 27 to 32 percent of modified polyurethane resin, 6 to 15 percent of vinyl chloride-vinyl acetate copolymer liquid, 8 to 33 percent of a pigment, 0.4 to 0.8 percent of a dispersing agent, 0.3 to 0.5 percent of wax powder, 0.2 to 0.8 percent of an antistatic agent, 0.2 to 0.5 percent of an anti-precipitating agent, 0.5 to 1.5 percent of an adhesive force reinforcing agent, 10 to 25 percent of propyl acetate, 5 to 15 percent of ethyl acetate, and 10 to 20 percent of butyl acetate. The compound ink prepared in the invention has the advantages as follows: the tinting strength is high; the color is bright; the transparency is high; the printing adaptability is high, so that the compound printing ink can be widely applied to high-low speed printing of plastic flexible packaging composite materials such as PET, NY and BOPP; the adhesive force to various plastic film base materials is great, and firmness is achieved; resistance to corrosion of acid, alkali and the like is high; hot adhesion phenomena are avoided; the water resistance is high; the temperature resistance is high, so that the compound printing ink can meet the processing requirements of follow-up processes such as boiling, high-temperature cooking, food refrigerating, and is high in storage stability.

Description

technical field [0001] The invention relates to a composite ink, in particular to an ester-soluble polyurethane composite ink and a preparation method thereof. Background technique [0002] With the development of China's economy and cultural undertakings, the printing, publishing and packaging industries are developing rapidly, and the domestic demand for inks has increased sharply. According to statistics, the consumption of flexible packaging inks in my country has maintained a growth rate of 25% year by year, which also means that the consumption of binders for inks is also growing at a high speed. As an important part of the ink, the binder largely determines the viscosity, viscosity, dryness, fluidity and other properties of the ink. If you want to get high-quality ink, you must use high-quality resin for ink. Plastic gravure printing ink mainly includes the following three series according to the binder: chlorinated polypropylene, polyamide and polyurethane. Polyam...

AI Technical Summary

Problems solved by technology

Because ester alcohol solvents do not have a good compatibility with traditional plastic ink binders, this type of ink contains a large amount of benzophenone solvents, and these solvents are toxic and have a strong pungent smell, which is easy to pollute when used Air, long-term inhalation will affect the central nervous system of the brain and cause great harm to human health

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