Experimental study on gap bridging in contour laser transmission welding of polycarbonate and polyamide

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DOIResolve DOI: http://doi.org/10.1002/pen.21943
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TypeArticle
Proceedings titlePolymer Engineering and Science
ConferencePOLYCHAR 18 - World Forum for Advanced Materials, April 7-10, 2010, Siegen, Germany
ISSN0032-3888
Volume51
Issue8
Pages16261635; # of pages: 10
SubjectCrystallinities; Effects of materials; Experimental studies; Gap thickness; High laser power; Laser scans; Laser transmission welding; Load direction; Low concentrations; Non-contact; Optimized process; Polyamide 6; Process parameters; Test method; Weld lines; Weld seam; Carbon black; Carbon fibers; Glass fibers; Laser beam welding; Load testing; Mechanical testing; Reinforced plastics; Shear strength; Glass lasers
AbstractLaser transmission welding (LTW) is a technique for joining thermoplastics. During contour LTW, any gaps or spaces between the two parts along the weld seam may prevent a weld from forming. This work presents an experimental study on the effects of material property (carbon black level, glass fibers, and crystallinity), process parameters (laser scan power and scan speed), and weld gap thickness on the strength and microstructure of contour welds made of polycarbonate (PC), polyamide 6 (PA6), and PA6 reinforced with 30% glass fiber. Lap specimens, with weld lines parallel to the load direction during mechanical testing, were used to assess the weld shear strength. The results indicated that low concentrations of laser absorbing pigment accompanied by high laser power improve gap bridging. The study also indicated that a novel noncontact test method can be used to search for the optimized process parameters for gap bridging. The maximum gaps bridged were 0.2, 0.4, and 0.25 mm for PC, PA6, and reinforced polyamide 6, respectively. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NPARC number21271953
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Record identifierbcf0f164-03b8-463a-af61-781468c51045
Record created2014-05-13
Record modified2016-05-09
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