Effect of carbon black on light transmission in laser welding of thermoplastics

It is important to describe the laser energy transmission and absorption in polymers properly when modeling heat transfer in laser transmission welding (LTW) of thermoplastics. This paper uses the Bouguer–Lambert law and an apparent absorption coefficient to describe the total laser energy attenuati...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials processing technology 2011, Vol.211 (1), p.43-47
Main Authors: Chen, Mingliang, Zak, Gene, Bates, Philip J.
Format: Article
Language:English
Subjects:
Absorption coefficient
Attenuation
Carbon black
Laser beam welding
Laser transmission welding
Light scattering
Mathematical models
Polyamide
Polyamide resins
Polycarbonate
Polycarbonates
Thermoplastic resins
Transmission
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is important to describe the laser energy transmission and absorption in polymers properly when modeling heat transfer in laser transmission welding (LTW) of thermoplastics. This paper uses the Bouguer–Lambert law and an apparent absorption coefficient to describe the total laser energy attenuation in scattering polymers with and without carbon black (CB). The model was validated using the measured transmittances as a function of part thickness for unreinforced polyamide 6 (PA6), glass fibre reinforced polyamide 6 (PA6GF) as well as amorphous polycarbonate (PC). A linear relationship between the (apparent) absorption coefficient and the CB level in polymers was observed experimentally for PA6, PA6GF and PC.
ISSN:0924-0136
DOI:10.1016/j.jmatprotec.2010.08.017