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Proceedings Paper

Laser welding of plastics transparent to near-infrared radiation
Author(s): Kimitoshi Sato; Yasuo Kurosaki; Takushi Saito; Isao Satoh
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Paper Abstract

This paper deals with a development of laser welding of colored plastics. Welding of thermoplastics using near-IR lasers has been seen in wide industrial application. Most of thermoplastics are transparent to near-IR laser. Particular characteristic of near-IR laser radiation has the ability to heat the interface between the transparent part and absorbent one colored with pigments. However, it is difficult to weld a pair of transparent materials by a laser beam, since there is no absorption region within them. In this paper, the influence of near-IR transparent plastics on the yield strength of their weldments has been studied: various colored plastics transparent to diode laser radiation were tested as the welding material. The heat transfer within a welding system was also analyzed and assessed the appropriate absorptivity and transmittance of overlapping colored plastic.

Paper Details

Date Published: 18 June 2002
PDF: 9 pages
Proc. SPIE 4637, Photon Processing in Microelectronics and Photonics, (18 June 2002); doi: 10.1117/12.470662
Show Author Affiliations
Kimitoshi Sato, Univ. of Electro-Communications (Japan)
Yasuo Kurosaki, Univ. of Electro-Communications (Japan)
Takushi Saito, Tokyo Institute of Technology (Japan)
Isao Satoh, Tokyo Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 4637:
Photon Processing in Microelectronics and Photonics
Jan J. Dubowski; Willem Hoving; Koji Sugioka; Malcolm C. Gower; Richard F. Haglund; Alberto Pique; Frank Traeger; Jan J. Dubowski; Willem Hoving, Editor(s)

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