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 language | English |
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Title of host publication | 32nd International Congress on Applications of Lasers & Electro-Optics (ICALEO 2013) |
Publisher | Laser Institute of America |
Pages | 166-174 |
ISBN (Print) | 978-0-912035-98-7 |
Publication status | Published - 2013 |
MoE publication type | Not Eligible |
Event | 32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013 - Miami, United States Duration: 6 Oct 2013 → 10 Oct 2013 Conference number: 32 |
Conference
Conference | 32nd International Congress on Applications of Lasers and Electro-Optics, ICALEO 2013 |
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Country/Territory | United States |
City | Miami |
Period | 6/10/13 → 10/10/13 |