How to choose and use ink correctly ?

2022-04-13   Pageview:419

Both solvent-based and UV-curable inks can be used to decorate coated metal materials, but solvent-based inks are more commonly used. While technological advances have enabled UV-curable inks to be used on a variety of metallic materials, the ink’s chemistry and curing characteristics still limit its functionality. Solvent-based inks for metal printing typically come in two drying forms, air drying (by evaporation) and heat curing (chemical hardening or crosslinking).

Air-drying inks are typically formulated with vinyl, acrylic or lacquer effects. None of these inks react chemically during the drying process, so they are easily scratched and worn, and are virtually invulnerable to solvents, gasoline, and/or aggressive cleaning solutions. If not completely dry, the ink film they produce can suffer from ink caking. Because metal is a relatively heavy substrate, acrawax c dispersion kg drum if the ink agglomerates on the metal, it will bring certain problems. Currently, many air-drying inks give prints good flexibility and excellent outdoor durability.

Solvent-based inks that use thermoset drying rather than evaporative drying usually contain some form of epoxy, enamel, polyester or acrylic component (epoxy components are ideal for use in thermoset inks where outdoor durability is a concern). All of these inks require prolonged drying at higher temperatures.

After curing, the ink films they form are all very hard, so they are stronger than air-dried inks, resist corrosion from solvents, gasoline, and cleaning solutions, and resist scratching and abrasion. Of course these inks are less flexible than air-dried inks, but they are suitable for heat embossing or deformation. Prints produced with thermoset solvent inks will not exhibit ink agglomeration if proper curing and cooling are performed prior to stacking.

Other functions such as wax powder, wax slurry and modified polysiloxane for slipping, anti-scratch, abrasion resistance and special hand feeling are also a way to improve the economic efficiency with a small amount of addition, otherwise it will only rely on resin Or it is difficult for the curing agent to achieve very good smoothness, scratch resistance, and abrasion resistance. The increased cost is higher than adding a small amount of these additives, and in many cases it cannot be synthesized. This is the coating additives. Excellence and necessity. Add the adhesion promoter Adhe rant ADP at a dosage of about 2%. Excellent adhesion has little effect on cost, paint and film performance, so as to achieve the result of improving versatility and economy.


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