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Proceedings Paper

Infrared Laser Surface Treatment Of Sheet Molding Compound (SMC) For Adhesive Bonding: The Effect Of Power Density And Fluence On Adhesive Properties
Author(s): John Newbould
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Paper Abstract

Many automotive parts, such as hoods and decklids, are made by adhesively bonding sheet molding compound (SMC) sub-assemblies. The presence of contaminants such as mold releases, together with variable chemical composition, characterizes the SMC surface. Thus some form of surface preparation is required to ensure reproducible adhesive bonding. This paper describes how a reproducible bonding surface can be obtained by ablation of the variable outer layer with an infrared laser. The effect of laser beam power density and fluence on surface properties, ablation depth, and adhesion is discussed. As laser beam delivery systems can be readily automated, this procedure has substantial potential for use in an automated SMC manufacturing system.

Paper Details

Date Published: 24 October 1988
PDF: 12 pages
Proc. SPIE 0957, Laser Beam Surface Treating and Coating, (24 October 1988); doi: 10.1117/12.947707
Show Author Affiliations
John Newbould, General Motors Research Laboratories (United States)

Published in SPIE Proceedings Vol. 0957:
Laser Beam Surface Treating and Coating
Gerd Sepold, Editor(s)

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