Method of marking an article having at least a polyolefin surface and an article having a polyolefin surface provided with a black mark of decomposed polyolefin
AssigneeWavin B.V.
InventorAlbert Holsappel
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Abstract
This invention concerns a method of marking articles having a polyolefin surface by exposure to a laser beam. The polyolefin contains a sufficient amount of a laser radiation absorbing substance for decomposing the polyolefin, so that a black mark of decomposed polyolefin will be formed. The laser radiation absorbing substance is a silicon compound, preferably a metal silicate, e.g. calcium-metasilicate or kaoline. The invention also comprises an article having a polyolefin surface, provided with a black mark of decomposed polyolefin formed by a laser beam.
Claims17
An article having at least a polyolefin surface, provided with a mark obtained by exposing said surface to the action of a laser beam, wherein the polyolefin comprises a nondye laser radiation absorbing substance in an amount sufficient for decomposing the poly-olefin by the laser beam energy.
An article, comprising:
- a polyolefin surface;
- a laser radiation absorbing substance mixed with the polyolefin;
- a decomposition of the polyolefin surface obtained by exposing the surface to a laser beam.
Dependencies are inferred from the claim text.