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AssigneeDegussa AG
InventorsKlaus-Dieter Schubel, Jurgen Kreutz, Wilhelm Wolff, Gunther Ittmann, Thomas Hasskerl, Harald Hager, Ralf Richter, Wolfgang Stuber
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The present invention relates to plastic molded bodies having two-dimensional or three-dimensional image structures produced in the interior through laser subsurface engraving. The plastic molded bodies are made of plastic materials which have a content of nanoscale metal oxides having particle sizes from 1 to 500 nm, both the plastic material and also the included metal oxide being transparent to the laser light used for producing the image structures. The plastic materials from which the molded bodies are manufactured particularly contain metal oxides having particle sizes from 5 to 100 nm at a content of 0.0001 to 0.1 weight-percent. Typical metal oxides are nanoscale indium-tin oxide or antimony-tin oxide.
A plastic molded body having a two-dimensional or three-dimensional image structure in its interior, wherein said plastic molded body comprises a plastic material and nanoscale metal oxides with particle sizes from 1 to 500 nm, and wherein both the plastic material and the metal oxides are transparent to laser light with a wavelength of 300-1300 nm.
A method for producing two-dimensional or three-dimensional image structures in the interior of plastic molded bodies through laser subsurface engraving, comprising irradiating a composition comprising a plastic material and nanoscale metal oxides having particle sizes from 1 to 500 nm with laser light wherein both said plastic material and said metal oxides are transparent to said laser light.
Dependencies are inferred from the claim text.