Special water-based ink for polyethylene-polyvinyl acetate thin films and preparation method of ink

Abstract

The invention discloses a special water-based ink for polyethylene-polyvinyl acetate thin films and a preparation method of the ink. The ink comprises, by weight, a first water-based ink connecting material, a coloring agent, a water-based ink dispersing agent liquid, an alcohol solvent, 10-15% of deionized water, high-acid-value acrylic acid, 4-5% of a second water-based ink connecting material,1.5-2% of an adherence promoter, 0.3-0.4% of a slipping agent liquid and 1-2% of a weather-resistant agent liquid, wherein the first water-based ink connecting material is high-molecular-weight resin,and the hydrophilic value of the high-molecular-weight resin is 10-12; The second water-based ink connecting material is low-molecular-weight resin, and the hydrophilic value of the low-molecular-weight resin is 11-13. The ink prepared through the method has the advantages of being good in liquidity, excellent in shallow screen printing transfer effect, high in printing adaptability and the like.

Description

technical field [0001] The invention relates to the technical field of water-based ink, in particular to a special water-based ink for polyethylene-vinyl acetate film and a preparation method thereof. Background technique [0002] With the continuous enhancement of human environmental protection awareness, green environmental protection has become the development theme of the 21st century. In recent years, many countries have increased the requirements and constraints of hygiene and environmental protection in packaging and printing. Due to the use of organic solvent inks and varnishes, It will emit hydrocarbons, pollute the air, and damage health. Therefore, at present, printing materials in developed countries basically no longer use solvent-based printing materials. Research, development and application of pollution-free, less-polluting, and pollution-free printing materials have become green packaging. The inevitable requirement of development, therefore, more attention ...

AI Technical Summary

Problems solved by technology

[0005] However, most manufacturers currently using polyethylene-vinyl acetate film printing are still using traditional solvent inks. Organic solvents in solvent-based inks account for 30% to 50% of the total ink. These organic solvents are alcohols , such as butanol, isopropanol, etc.; ethers, in the process of manufacture and use, a large amount of solvents volatilize, workers working in this environment for a long time will cause great damage to the nervous system, and solvent-based inks will produce A large amount of VOCS causes air pollution, which has great disadvantages to VOCS treatment. Therefore, solvent-based ink is the biggest pollution in the printing industry at present. The printing coating amount of solvent-based ink is about 10% higher than that of water-based ink, and the printing cost is higher than that of water-based ink. Water-based ink, because polyethylene-polyvinyl acetate film is composed of PE and EVA, because PE is an inert material, it is difficult to print, smooth after printing, poor in light resistance, and poor in adhesion fastness. Under the pressure of environmental protection, some manufacturers of printing polyethylene-vinyl acetate film are using water-based ink, but the drying speed of the ink is a big printing problem. Due to the slow drying of the ink, the printing speed is slow, which seriously affects the printing production efficiency. , and the printed matter is prone to false drying. In order to improve the drying speed, the drying speed can only be improved by changing the ventilation system of the printing equipment, printing plate rollers, etc. The change of equipment requires a lot of manpower and financial resources, which is difficult for most printing manufacturers. Therefore, it is necessary to A new water-based ink specially developed for polyethylene-vinyl acetate film is technically prepared to solve the above problems

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