Environment-friendly compound printing ink

Abstract

The invention relates to environment-friendly compound printing ink, which is composed of resin, pigment and solvent; wherein the resin is formed by natural alcohol solubility polyamide resin with 4000-8000 of number-average molecular weight and ethylene vinylacetate copolymer copolymer resin with 10000-30000 of number-average molecular weight by 4-2 : 1 of mass ratio, the solvent is alcohols solvent with less than 10 carbon numbers, the pigment is alcohol solubility pigment, and the total weight of the compound printing ink is taken as standard; the ink is constituted by 30-50 percent of resin, 5-30 percent of pigment and 20-65 percent of solvent. The ink can adopt alcohol to dissolve, and can use alcohol to dilute, thereby being avoiding from using harmful solvents such as benzene and being beneficial to environmental protection; in addition, the compound printing ink has good printing adaptability, and good adhesion, and the heat resistance of the compound printing ink can reach 150DEG C on the premise that heat-resisting gloss oil is coated, meanwhile, the requirements of boiling resistance is met and the ink is suitable for package of ham sausages; in addition, the coloring ability of the screen dot of the ink is good, three-color overprinting color is bright and has clear levels.

Description

technical field [0001] The invention belongs to the field of inks, in particular to an environment-friendly composite ink. Background technique [0002] Inner-print composite packaging occupies a large proportion in the field of flexible packaging. The so-called inner-print composite packaging is to print ink on film or paper, and then use glue on the compound machine to compound the printed surface and other films to form a packaging layer. The advantage of this is that the printing ink is sealed between the two layers of film (or film and paper), the ink has little effect on the quality of the items to be packaged by the film, and it can obtain good abrasion resistance and scratch resistance, which can be very good To ensure the integrity of the pattern. [0003] The composite ink used for inner printing composite packaging is mainly composed of resin, pigment and solvent. At present, it can be divided into three types: 1. Most inks that use benzene, ketones, and esters ...

AI Technical Summary

Problems solved by technology

[0004] Due to the use of benzene as a solvent in the existing composite ink, it will cause great harm to the health of the operators during ink production and printing; and the smell is relatively large, and the harmful solvent residue is difficult to meet the standard

In addition, many products have poor versatility and can only be used on one or a few types of substrates. Most of them are concentrated in the low-end OPP market with limited functions and are often only suitable for composite packaging alone.

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