Offset printing metal ink, preparation method of offset printing metal ink, and printing process of offset printing metal ink applied to aluminum plate

Abstract

The invention provides an offset printing metal ink. The offset printing metal ink comprises the following components in percentage by mass: 45-60% of binders, 25-30% of pigment, 6-12% of a filler, 8-20% of a solvent and 0.5% of a drying agent, wherein the binders are vegetable oil modified alkyd resin and phenolic resin, the mass ratio of the vegetable oil modified alkyd resin to the phenolic resin is (1.5-2):1, and the filler is colloid calcium. High-molecular-weight polyester is adopted for manufacturing the offset printing metal ink provided by the invention, so that the toughness of the stretched ink is high and the ink is not easily broken, and meanwhile, the self-repairing process from re-softening to drying can be performed during high-temperature baking, so that the stretched inkhas the characteristic of a large molecule coating. With the selection of the printing ink made of the appropriate bonding material, the problem of light loss is solved, and the printing adaptabilityis solved through a matched printing process, so that the perfect presentation of products is achieved.

Description

technical field [0001] The invention belongs to the technical field of oil powder printing technology, and in particular relates to an offset printing metal ink, a preparation method thereof and a printing process in which the offset printing metal ink is applied to an aluminum plate. Background technique [0002] As a part of food packaging, anti-counterfeiting and decoration are the two most important functions of the bottle cap industry. With the emergence of high-end bottle caps and molded gasket technology bottle caps, the ink requirements on the side of the bottle cap have increased, resulting in a huge difference in product grade and design aesthetics from traditional ink performance. The most important constraint is that the traditional bottle cap ink loses its gloss after being stretched on the side, which determines that many processes such as roll printing, molded gasket, and hot stamping on the side cannot be carried out. Subsequent processing can only be carrie...

AI Technical Summary

Problems solved by technology

The aluminum sheet packaging, especially the aluminum anti-theft cover printing, must be stretched. During the stretching process, due to the small molecular weight of the binder, the rearrangement of the ink between the primer and the varnish appears after the side stretching. Severe loss of gloss on sides when baked