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US 2019/0106837 A1Published application
Method for the partial coloring of plastic parts
AssigneeCovestro Deutschland AG
InventorsGeorgios TZIOVARAS, Ciro PIERMATTEO
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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.
Claims15
-14. (canceled)
A method for the partial dyeing of plastic components, including the steps
- i) submerging a plastic component in a dye bath,
- ii) possibly the heating of the dye bath,
- iii) irradiation of the plastic component from i) and possibly ii) with focussed non-ionising electromagnetic radiation, preferably focussed non-ionising electromagnetic radiation with a wavelength within a range of ≥0.1 μm to ≤1 mm, more preferably within a range of ≥0.15 μm to ≤20 μm, most preferably with laser radiation within a range of ≥0.15 μm to ≤20 μm,
- wherein the partial dyeing substantially happens only at the points irradiation during step iii).
1 more element
Dependencies are inferred from the claim text.