Thin-film printing water-based ink and preparation method thereof

Abstract

The invention discloses a thin-film printing water-based ink and a preparation method thereof. The thin-film printing water-based ink consists of the following raw materials in parts by mass: 30-35 parts of acrylic-modified waterborne polyurethane, 2-5 parts of an aldehyde-keton resin, 15-20 parts of am ethyl acetate solution, 5-10 parts of a wetting and dispersing agent, 8-30 parts of organic pigment, 25-43 parts of deionized water, 0.5-5 parts of a thickening agent and 1-5 parts of nanometer zinc oxide. The preparation method mainly comprises three steps of mixing, adjusting and filtering. An ink prepared by using the scheme is good in adhesion fastness for thin-film materials, and adapts to the great tensile amplitude and high viscosity of the thin film. Meanwhile the ink provided by the invention is fast in drying and is not prone to adhering; the solvent residue of printed packages is under standards and has a slight odor; the use of an aqueous solvent reduces environmental pollution caused by toxic or harmful products, so that hazardous substances on surfaces of printed materials can meet safety and health standards; the ink is safety and environmentally friendly; and meanwhile energy consumption can be obviously reduced.

Description

technical field [0001] The invention relates to the field of film printing, in particular to a water-based ink for film printing and a preparation method thereof. Background technique [0002] At present, the inks used for logistics film bag printing are mainly solvent-based inks. The solvents used in solvent-based inks are mainly toluene, xylene and industrial alcohol, etc. Therefore, a large amount of harmful gases will be volatilized during the production and printing process, which will destroy the ozone layer of the atmosphere, and will also have great impact on the health and safety of the staff. Moreover, after the printing is completed, there are residual toxic substances on the surface, which cannot meet people's needs for environmental protection. In order to change the disadvantages of many hazards of solvent-based inks, it is indeed necessary to provide a water-based ink that can be used for film printing and a preparation method thereof. Contents of the i...

AI Technical Summary

Problems solved by technology

The solvents used in solvent-based inks are mainly toluene, xylene and industrial alcohol, etc. Therefore, a large amount of harmful gases will be volatilized during the production and printing process, which will destroy the ozone layer of the atmosphere, and will also have great impact on the health and safety of the staff. Moreover, there are residual toxic substances on the surface after printing, which cannot meet people's needs for environmental protection.