Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique

Saara Ruotsalainen, Petri Laakso, Veli Kujanpää

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

Abstract

Quasi-simultaneous laser welding (QSLW) of polymers is widely known laser joining technique. Traditionally joining of polymers has been done by using lasers of around 1 ?m wavelength. With this wavelength the pair of polymers to be joined needs to be transparent and absorbing, usually clear and black. Joining of two transparent polymers with laser has been possible only by using laser absorbing additive between the samples or by doping the polymer with absorbing additive. During the last years lasers with new wavelengths between 1.4 to 2 ?m have been developed. With this wavelength range welding of the transparent polymer to another transparent one without any absorbing additives has become possible. Only few studies of joining transparent polymers with new wavelength lasers are published. In this paper joining of transparent to transparent polymers with QSLW technique and 1.9 ?m fibre laser is studied. Also a new scanning technique for QSLW is introduced. In this technique laser beam path is off-setting to a different place in every scanning round. This way the Gaussian beam shape of fibre laser can be smoothened to be more suitable for polymer welding and variation of the weld width is possible without changing the scanner optic. With this technique more flexibility on laser welding of polymers is achieved without losing the benefits of quasi-simultaneous laser welding.
Original languageEnglish
Title of host publication32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013)
PublisherLaser Institute of America
Pages166-174
ISBN (Print)978-0-912035-98-7
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event32nd International Congress on Applications of Lasers & Electro-Optics, ICALEO - Miami, United States
Duration: 6 Oct 201310 Oct 2013
Conference number: 32

Conference

Conference32nd International Congress on Applications of Lasers & Electro-Optics, ICALEO
CountryUnited States
CityMiami
Period6/10/1310/10/13

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laser welding
scanning
polymers
lasers
wavelengths
welding
fiber lasers
scanners
flexibility
laser beams
optics

Cite this

Ruotsalainen, S., Laakso, P., & Kujanpää, V. (2013). Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique. In 32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013) (pp. 166-174). [ICA13_604] Laser Institute of America.
Ruotsalainen, Saara ; Laakso, Petri ; Kujanpää, Veli. / Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique. 32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013). Laser Institute of America, 2013. pp. 166-174
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abstract = "Quasi-simultaneous laser welding (QSLW) of polymers is widely known laser joining technique. Traditionally joining of polymers has been done by using lasers of around 1 ?m wavelength. With this wavelength the pair of polymers to be joined needs to be transparent and absorbing, usually clear and black. Joining of two transparent polymers with laser has been possible only by using laser absorbing additive between the samples or by doping the polymer with absorbing additive. During the last years lasers with new wavelengths between 1.4 to 2 ?m have been developed. With this wavelength range welding of the transparent polymer to another transparent one without any absorbing additives has become possible. Only few studies of joining transparent polymers with new wavelength lasers are published. In this paper joining of transparent to transparent polymers with QSLW technique and 1.9 ?m fibre laser is studied. Also a new scanning technique for QSLW is introduced. In this technique laser beam path is off-setting to a different place in every scanning round. This way the Gaussian beam shape of fibre laser can be smoothened to be more suitable for polymer welding and variation of the weld width is possible without changing the scanner optic. With this technique more flexibility on laser welding of polymers is achieved without losing the benefits of quasi-simultaneous laser welding.",
author = "Saara Ruotsalainen and Petri Laakso and Veli Kujanp{\"a}{\"a}",
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Ruotsalainen, S, Laakso, P & Kujanpää, V 2013, Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique. in 32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013)., ICA13_604, Laser Institute of America, pp. 166-174, 32nd International Congress on Applications of Lasers & Electro-Optics, ICALEO, Miami, United States, 6/10/13.

Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique. / Ruotsalainen, Saara; Laakso, Petri; Kujanpää, Veli.

32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013). Laser Institute of America, 2013. p. 166-174 ICA13_604.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AB - Quasi-simultaneous laser welding (QSLW) of polymers is widely known laser joining technique. Traditionally joining of polymers has been done by using lasers of around 1 ?m wavelength. With this wavelength the pair of polymers to be joined needs to be transparent and absorbing, usually clear and black. Joining of two transparent polymers with laser has been possible only by using laser absorbing additive between the samples or by doping the polymer with absorbing additive. During the last years lasers with new wavelengths between 1.4 to 2 ?m have been developed. With this wavelength range welding of the transparent polymer to another transparent one without any absorbing additives has become possible. Only few studies of joining transparent polymers with new wavelength lasers are published. In this paper joining of transparent to transparent polymers with QSLW technique and 1.9 ?m fibre laser is studied. Also a new scanning technique for QSLW is introduced. In this technique laser beam path is off-setting to a different place in every scanning round. This way the Gaussian beam shape of fibre laser can be smoothened to be more suitable for polymer welding and variation of the weld width is possible without changing the scanner optic. With this technique more flexibility on laser welding of polymers is achieved without losing the benefits of quasi-simultaneous laser welding.

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Ruotsalainen S, Laakso P, Kujanpää V. Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique. In 32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013). Laser Institute of America. 2013. p. 166-174. ICA13_604