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Composite plastic with laser altered internal material properties

  • US 4,822,973 A
  • Filed: 09/28/1987
  • Issued: 04/18/1989
  • Est. Priority Date: 03/30/1984
  • Status: Expired due to Fees
First Claim
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1. A composite plastic part of thermoplastic materials having good adhesion and compatability with one another and similar contraction behavior and having material properties altered by a laser beam, the composite plastic part having a thermoplastic surface layer with a layer thickness of from 0.1 to 2 mm, a light transmission value τ

  • of greater than 0.8 and more particularly greater than 0.9 at a wavelength of from 1000 to 20,000 um, and an internal thermoplastic material region below the surface layer with a light absorption value to a depth of 2 mm of greater than 80% of incident laser beams, internal thermoplastic material region containing a subsequently laser induced change therein.

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