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US 10,662,581 B2Granted
Method for the partial coloring of plastic parts
AssigneeCovestro Deutschland AG
InventorsGeorgios Tziovaras, Ciro Piermatteo
Life of this patent
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Abstract
The present invention concerns a method for the partial dyeing, in particular for the colour laser engraving, of plastic components, in particular thermoplastic plastic components, more particularly thermoplastic plastic components, comprising a layer construction as well as the resulting partially dyed, preferably colour laser engraved plastic components, in particular thermoplastic plastic components.
Claims13
A method for the partial dyeing of plastic components, including the steps
- i) submerging a plastic component in a dye bath,
- ii) optionally heating of the dye bath,
- iii) irradiation of the plastic component from i) and optionally ii) with focused non-ionising electromagnetic radiation having a wavelength within a range of ≥0.1 μm to ≤1 mm, wherein the partial dyeing substantially happens only at the points irradiated during step iii).
Dependencies are inferred from the claim text.