Defoamed flexographic printing environment-friendly tipping paper water-based ink and preparation method thereof

Abstract

The invention provides a defoamed flexographic printing environment-friendly tipping paper water-based ink and a preparation method. The water-based ink comprises the following components by weight: 12%-18% of grinding resin that is a mixture of acrylic resin and water-based polyurethane resin with the mass ratio of the acrylic resin to the water-based polyurethane resin being 1:0.5-2; 20%-40% ofstyrene acrylic resin; 10%-22% of pigment; 0.3%-0.8% of a wetting agent; 0.6%~1.0% of a leveling agent; 0.01%-0.1% of a fluorocarbon special surfactant; 2%-2.5% of a dispersing agent; 0.1%-1.0% of a pH regulator; and remaining amount of water. The defoamed flexographic printing environment-friendly tipping paper water-based ink can be suitable for flexographic printing production of tipping paper,and the printed tipping paper is flat and does not deform; in addition, the fluorocarbon special surfactant is added into the ink system to serve as the defoaming agent, so that the surface tension of the ink can be remarkably reduced, and bubble marks are prevented from being generated. Besides, pure water is used as a solvent of the water-based ink, no volatile organic solvent is contained, thetotal amount of VOCs in the ink is lower than 5%, and the quality is more excellent.

Description

technical field [0001] The invention relates to the technical field of flexo printing water-based ink, in particular, the invention relates to a defoaming-treated flexo printing environmental protection tipping paper water-based ink and a preparation method. Background technique [0002] At present, the traditional printing method of tipping paper is solvent-based ink gravure printing, which not only has hidden dangers in health and safety indicators, but also inevitably emits ethanol, ethyl acetate, n-propyl acetate, etc. into the atmosphere during the production process. Non-toxic organic solvents (i.e. VOCs). In order to further improve the safety performance of cigarette tipping paper and reduce VOCs emissions in the production process, it is necessary to seek a safer and more environmentally friendly production method. [0003] Water-based ink is made of compound grinding process such as water-soluble resin, organic pigment, and food-grade binder. Its advantage is tha...

AI Technical Summary

Problems solved by technology

Investigate the current flexo printing water-based inks on the market, among which the total amount of VOCs does not exceed 5%, which is mainly used for the printing of plastic film and cardboard, and it is directly applied to the printing production of tipping paper, and there are semi-finished products after printing. Deformation, unevenness, and air bubbles The main reasons are: (1) The tipping base paper is thin, and it is easy to deform after absorbing water, while the water content in the commercially available water-based ink is high, and it cannot be dried in time after printing, resulting in moisture absorption in the printing area of ​​the paper The elongation and blank area still remain the same, resulting in lotus leaf phenomenon (wavy curl); (2) The surface tension of the commercially available water-based ink system is high, and the ink is prone to foam due to repeated stirring and impact during the circulation process, while the ink in the ink Foam breaks on the surface of the paper, resulting in missing prints, that is, bubble prints

Therefore, commercially available flexographic water-based inks with a VOCs content of less than 5% do not meet the production needs of tipping paper printing, and it is necessary to redevelop water-based inks suitable for tipping paper flexographic printing

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