Water-soluble gravure ink and preparation method thereof

Abstract

The invention discloses water-soluble gravure ink and a preparation method thereof. The water-soluble gravure ink is prepared from, by mass, 40-60% of acrylic emulsion, 5-15% of polyurethane emulsion, 10-15% of pigment, 2-3% of solvent, 0.2-1% of defoaming agents, 0.5-1.5% of dispersing agents, 0.2-1% of flatting agents, 12-21% of water and 1-3% of curing agents. The acrylic emulsion, the polyurethane emulsion and the defoaming agents are stirred and dispersed to be prepared into pre-emusion, then the pigment, the dispersing agents, the flatting agents, the solvent and the water are added, the mixture is stirred evenly, before the ink is used, the curing agents are added, the ink is stirred and dispersed, and then the ink can be used. According to the water-soluble gravure ink and the preparation method thereof, the significant advantages of being safe, free of poison and harm, non-ignitable, non-explosive and the like are achieved, and human body health and environment safety are facilitated; when the ink is used, the ink is good in stability on an ink machine, rapid to dry, clear in patterns of printed products and capable of simultaneously suitable for multiple substrates such as paper and plastic.

Description

technical field [0001] The invention relates to the field of inks, in particular to water-soluble gravure inks and a preparation method thereof. Background technique [0002] At this stage, about half of the gravure printing inks in my country are still chlorinated polypropylene. Chlorinated polypropylene contains a large amount of VOC such as toluene, methyl ethyl ketone, methyl isobutyl ketone, etc., but because of its low price, the market share is still very large. high. Traditional flexible packaging gravure printing mainly uses chlorinated polypropylene as the main resin with benzoketone solvent-based inks. Since conventional engraving gravure printing inks contain a large amount of vegetable oils, oil-soluble polymer binders (such as vegetable oil modified alkyd resin binders, polyurethane resin binders, rosin and its derivatives polyol ester resin binders, rosin Modified phenolic resin adhesive, oil-soluble pure phenolic resin adhesive, epoxy resin adhesive, etc.), ...

AI Technical Summary

Problems solved by technology

Since conventional engraving gravure printing inks contain a large amount of vegetable oils, oil-soluble polymer binders (such as vegetable oil modified alkyd resin binders, polyurethane resin binders, rosin and its derivatives polyol ester resin binders, rosin Modified phenolic resin adhesive, oil-soluble pure phenolic resin adhesive, epoxy resin adhesive, etc.), surfactants, waxes, desiccants, solvents (such as #200 mineral spirits and / or 210 mineral oil and / or or non-aromatic mineral oil with a boiling range of 170-190°C, such as solvents with a low boiling point or a narrow boiling range), etc., are harmful to the environment and the human body, and are not suitable for printing packaging and other printed products that require strict hygienic conditions, and Conventional engraved gravure printing inks have certain flammability, high ink odor and high post-printing treatment costs during production and use, which seriously pollute the environment and bring a lot of inconvenience to the safe and confidential printing process, such as CN1390897A, CN1392203A, CN1563221A , CN1560145A, these conventional engraving gravure inks have the advantage of printing banknotes without paper, and the drying time is generally 24 hours after printing. Due to the long drying time, it is necessary for the storage of printed products and the next process in the printing process. It is inconvenient to come; the solvent in engraving gravure ink is volatile. During the printing process, the wiping solution contains a lot of sodium hydroxide and ancient oil. After the printing is completed, it will bring serious pollution to the environment.