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Influence of structuring by laser and plasma torch on the adhesion of metallic films on thermoplastic substrates

: Knapp, W.; Djomani, D.; Coulon, J.F.; Grunchec, R.


Schmidt, F.:
Laser Assisted Net Shape Engineering 8 : International Conference on Photonic Technologies, Proceedings of the LANE 2014, September 08-11, 2014, Fürth, Germany
Amsterdam: Elsevier, 2014 (Physics Procedia 56.2014)
International Conference on Laser Assisted Net Shape Engineering (LANE) <8, 2014, Fürth>
International Conference on Photonic Technologies <2014, Fürth>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer ILT ()

In this study three different types of thermoplastics haven been investigated: polypropylene (PP, used in automotive industry), poly-ether-ether-ketone (PEEK, used in aerospace applications) and polyethylene (PE, used in medical applications). Surface preparation prior to thin film coating was realized using industrial plasma torch and ultra-short pulse laser. Whereas the plasma torch is a very cost efficient tool the laser light allows precise and localized surface modification. The adhesion measurements of an Al-film deposited on the substrate show that laser structuring can yield in a cohesive rupture. Adhesion can be increased by a factor of 4 to 7 with regard to conventional joining techniques.