Marking a polyolefin surface with a black mark of decomposed...

Details Marking a polyolefin surface with a black mark of decomposed... Marking a polyolefin surface with a black mark of decomposed...

B - Operations, Transporting

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B23K 26/18 (2006.01) B29C 59/16 (2006.01) B41M 5/26 (2006.01) B44C 1/00 (2006.01) B29C 35/08 (2006.01)

Patent

CA 1230483

- 1 - A B S T R A C T A 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. The 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.

441717

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