Laser welding of plastics transparent to near-infrared radiation

Kimitoshi Sato; Yasuo Kurosaki; Takushi Saito; Isao Satoh

doi:10.1117/12.470662

18 June 2002 Laser welding of plastics transparent to near-infrared radiation

Kimitoshi Sato, Yasuo Kurosaki, Takushi Saito, Isao Satoh

Proceedings Volume 4637, Photon Processing in Microelectronics and Photonics; (2002) https://doi.org/10.1117/12.470662
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

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.

Citation Download Citation

Kimitoshi Sato, Yasuo Kurosaki, Takushi Saito, and Isao Satoh "Laser welding of plastics transparent to near-infrared radiation", Proc. SPIE 4637, Photon Processing in Microelectronics and Photonics, (18 June 2002); https://doi.org/10.1117/12.470662

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