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Proceedings Paper

Transmission laser welding of plastics
Author(s): Paul A. Hilton; I. A. Jones; Y. Kennish
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Paper Abstract

The use of lasers for welding plastics was demonstrated in the early 1970s. However, it was not until late in the 1990s that production applications started to be considered widely. This followed the broad realization that by selection of a suitable combination of radiation wavelength and plastics additives, to control light transmission and absorption, heat could be generated at the joint of a pre-assembled part without melting its outer surfaces. It is of added benefit that the window of transmission for an unpigmented and unfilled plastic typically covers the wavelengths delivered by small and cost effective diode lasers. Recent developments in the transmission laser welding process for plastics are discussed, including methods for the generation of welds between two clear plastics, application of similar techniques to the joining of thermoplastic textiles and new equipment, able to heat a complete joint and assist in the sealing of assemblies where the joint surfaces are not particuarly smooth. An analytical heat flow model for the welding of clear plastics is shown in use for selecting process parameters.

Paper Details

Date Published: 3 March 2003
PDF: 9 pages
Proc. SPIE 4831, First International Symposium on High-Power Laser Macroprocessing, (3 March 2003); doi: 10.1117/12.486499
Show Author Affiliations
Paul A. Hilton, TWI Ltd. (United Kingdom)
I. A. Jones, TWI Ltd. (United Kingdom)
Y. Kennish, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 4831:
First International Symposium on High-Power Laser Macroprocessing
Isamu Miyamoto; Kojiro F. Kobayashi; Koji Sugioka; Reinhart Poprawe; Henry Helvajian, Editor(s)

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