Single-solvent high-speed printing plastic composite white ink and preparation method thereof

Abstract

The invention provides single-solvent high-speed printing plastic composite white ink and a preparation method thereof. The single-solvent high-speed printing plastic composite white ink comprises thefollowing components: 25-35% of modified polyurethane resin, 10-12% of ternary vinyl chloride-vinyl acetate resin, 10-35% of pigment, 10-30% of ester solvent, 0-1% of polyethylene wax, 0-1% of extinction powder, 0.2-0.5% of dispersing agent, 0.5-2% of adhesion promoter and 0.2-1.5% of other auxiliaries. According to the invention, a single ester solvent is used as an ink solvent, the dissolving power and volatilization speed are moderate, and the requirements of resin synthesis and printing equipment are met. The solvent in the printing ink is a single ester, so that the recovery and rectification of a recovery system are facilitated, the rectification purity can reach 99% or above, the recovered solvent can be normally used in printing and compounding processes, and the VOC emission canbe reduced to 5% or below before recovery. Meanwhile, by optimizing the formula and raw materials of the ink, the ink can be used for printing at the printing speed of 400 m / min or above.

Description

technical field [0001] The invention relates to the technical field of composite white ink, in particular to a single-solvent high-speed printing plastic composite white ink and a preparation method thereof. Background technique [0002] Gravure printing is one of the four major printing methods. It has the advantages of thick ink layer, bright color, high saturation, high printing plate durability, stable quality of printed products, and fast printing speed. occupies an extremely important position in the field of publishing. The current gravure printing inks are basically solvent-based inks, most of which are volatile and dry, so there is a problem of VOCS emissions. [0003] As the global environmental protection requirements become more and more stringent, the new "Environmental Protection Law" is promulgated, and various places have successively introduced mandatory local limit standards for VOCs emissions. All printing companies must take measures to deal with it. A...

AI Technical Summary

Problems solved by technology

Second, due to the limitation of the performance of ordinary single-solvent ink, it cannot be used on high-speed printing equipment with a printing speed of 400m / min, resulting in waste of equipment performance

[0005] The current alcohol-ester-soluble ink contains mixed solvents such as isopropanol, n-butyl ester, and propylene glycol methyl ether, so it cannot be rectified and separated during solvent recovery, resulting in the above problems when the solvent is recovered and reused.

However, ordinary single-solvent inks are inferior to ordinary alcohol-ester-soluble inks due to raw material performance and formulation problems, and cannot meet the requirements of high-speed printing.

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