Pigment-containing plastic molding composition
AssigneeHoechst Aktiengesellschaft
InventorsGerhard Hess, Ulrich Haack, Klaus Kurz
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Abstract
A plastic molding composition based on an organic thermoplastic polymer containing a black mineral pigment suitable as a material for the preparation of shaped articles which can be provided with symbols by exposure to laser radiation. The black pigment used is in particular animal charcoal, and the thermoplastic polymer is in particular a polyoxymethylene.
Claims12
A plastic molding composition essentially comprising at least one organic polymer and at least one carbon-containing pigment, wherein (a) the polymer is a thermoplastic polymer which is at least partially transparent to light in the wavelength range from 180 to 1200 nm, (b) the pigment is animal charcoal, bone black or ivory black.
A process for the production of a molding provided with symbols from a plastic molding composition through the action of laser radiation, where the molding composition essentially comprises at least one organic polymer and at least one carbon-containing pigment, wherein a plastic molding composition is used which comprises (a) a thermoplastic polymer which is at least partially transparent to light in the wavelength range from 180 to 1200 nm, and (b) a pigment which is animal charcoal, bone black or ivory black and the molding is exposed to laser radiation having a principal wavelength of 1064 nm or 532 nm or 351, 308 and 248 nm.
Dependencies are inferred from the claim text.