Composition for laser marking

Details Composition for laser marking Composition for laser marking

1997-03-17

1999-02-02

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

430945, 524449, 524494, C08K 332

Patent

active

058666443

ABSTRACT:
A resin composition having laser marking properties with the CO.sub.2 laser with radiation at 10600 nm comprises a polyester thermoplastic resin, a sufficient amount of dark pigment for forming a dark background coloration, a mica material for absorbing said laser radiation, and an effective amount of a hydrated metal phosphate containing water of crystallization wherein said metal phosphate decomposes in laser struck areas to release said hydrated water whereby light colored markings in laser struck areas are obtained on said dark background coloration.

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patent: 5599869 (1997-02-01), Kurz
T. Kilp, Laser Marking of Plastics', Annu. Tech. Conf. Soc. Plast. Eng. (1991), 49.sup.th, 1901-1903.

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