Insights into Smart Coloring´s
The subsequent dyeing of plastic films, parts or general objects bases on the ability of these plastics to firmly “store” organic molecules such as dyes in the plastic matrix. Polyolefins receive this ability by the addition of corresponding additives. Furthermore, suitable dyes are needed that migrate under certain conditions into the polymer matrix. The basis of our technology for the reversible coloring of plastics is therefore a selected additive-dye combination.
Dyes in polyolefins tend to migrate. A targeted combination of additives and dyes in combination with a suitable product design, the safe use of the coloring technology is achieved. Application-specific tests are nevertheless essential.
The additive is added to the plastic in form of a master batch. Depending on your requirements, we offer standard master batches or manufacture individual ones based on your own plastic granulates. At usual dosage a homogeneous distribution is achieved and the intrinsic properties of the plastic matrix remain unchanged.
The introduction of dyes takes place by immersing the plastics in aqueous dye baths at elevated temperatures. The dye migrates into the plastic and is trapped there when the plastic cools down again. Color intensity and penetration depth can be adjusted by various parameters. In the decoloring process, this process is reversed.