Process for laser-marking thermoplastic articles

Details Process for laser-marking thermoplastic articles Process for laser-marking thermoplastic articles

1992-09-29

1994-09-13

Lesmes, George F.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430346, 430495, 430945, 430947, 428141, 428142, G03C 1494, G03C 300, G03C 544, D06N 704

Patent

active

053468023

ABSTRACT:
Laser-marks (such as indicia, characters, symbols, patterns and the like) of exceptionally clear and thambiguous quality may be inscribed on the surface of an article whose surface region to be laser-marked is formed of a thermoplastic resin composition having a critical oxygen index of 22% or above as determined by ASTM D2863. The entire article may be formed (molded of such a thermoplastic resin composition, or the article may include a non-thermoplastic core having a surface layer thereof of the thermoplastic resin composition. Preferably, the thermoplastic resin composition is a polybutylene terephthalate with one or more flame retardants which impart the requisite critical oxygen index thereto.

REFERENCES:
patent: 5035983 (1991-07-01), Kiyonari et al.

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