Patent ID: 6118096
Filing Date: 2000-09-12
Classification: C08K,C09K,Y10S,Y10T

Abstract:
A method for producing a laser marked indicia on a molded, extruded or formed phosphorescent plastic article, comprising the steps of:compounding a polymeric composition that comprises (i) about 50% to about 99% by weight of a thermoplastic or a thermosetting resin, (ii) about 1% to about 50% by weight of a phosphorescent phosphor pigment, (iii) about 0.001% to about 20% by weight of a laser energy absorbing additive, and optionally zero to about 10% by weight of a lubricating agent, zero to about 2% by weight of a whitening pigment and zero to about 20% by weight of an inert filler;molding, extruding or forming the compounded composition to form a phosphorescent plastic article; andexposing a portion of the plastic article to laser energy from a laser to inscribe an indicia thereon.