Clearweld laser transmission welding of thermoplastic polymers: light transmission and color considerations

Scott Hartley; Robert A. Sallavanti

doi:10.1117/12.486516

19 February 2003 Clearweld laser transmission welding of thermoplastic polymers: light transmission and color considerations

Scott Hartley, Robert A. Sallavanti

Author Affiliations +

Proceedings Volume 4830, Third International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.486516
Event: LAMP 2002: International Congress on Laser Advanced Materials Processing, 2002, Osaka, Japan

Abstract

The past three years has seen the evolution and maturation of Clearweld technology as a tool which is readily employable for the transmission laser welding of thermoplastic and some thermoset polymers using near infrared lasers and inks uniquely chosen and targeted to absorb the laser light at the intended laser weld joint in order to efficiently and rapidly effectuate the weld. This paper will discuss the novel and useful transmission values and minimal haze characteristics of the welded polymeric part as compared to the unwelded component parts both in the nascent state and in parts prepared for the laser welding operation. Further presentation will be made relative to the color hue recession toward neutrality and the goal of colorlessness as the parts are taken from these prewelded states to the welded final part. Among the polymeric materials discussed are polycarbonate, cast polymethylmethacrylate, nylon and polyester. Detailed attention is given to the Clearweld process used in these welding operations as well as to the employed welding equipment, ink deposition, laser welding process parameters and full spectral characteristics of all components and welded parts. Mechanical characteristics of resultant welds are offered for verification and comparison of the process integrity as a novel and very useful manufacturing tool.

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Scott Hartley and Robert A. Sallavanti "Clearweld laser transmission welding of thermoplastic polymers: light transmission and color considerations", Proc. SPIE 4830, Third International Symposium on Laser Precision Microfabrication, (19 February 2003); https://doi.org/10.1117/12.486516

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