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Characterization of stochastic nanostructures on ethylene tetrafluoroethylene films

: Steiner, Cindy; Fahlteich, John

Kondruweit, S. ; International Council for Coatings on Glass e.V. -ICCG-; Fraunhofer-Institut für Schicht- und Oberflächentechnik -IST-, Braunschweig:
Advanced coatings for large-area or high-volume products. 11th International Conference on Coatings on Glass and Plastics, ICCG 2016 : June 12-16, 2016, Braunschweig, Germany; Proceedings, CD-ROM
Braunschweig: Fraunhofer IST, 2016
ISBN: 978-3-00-053590-1
International Conference on Coatings on Glass and Plastics (ICCG) <11, 2016, Braunschweig>
Bundesministerium für Bildung und Forschung BMBF
03V0224; flec25
Conference Paper
Fraunhofer FEP ()
ETFE; ethylene tetrafluoroethylene; film stretching; nanostructure; roll-to-roll; plasma etching

Application relevant properties such as optical transmittance and wetting behaviour of ethylene tetrafluoroethylene (ETFE) films may be improved by surface nanostructuring. Cast ETFE film and uniaxially stretched ETFE were nanostructured by a plasma etching process. The mechanical and optical properties as well as surface properties and structure formation changed for stretched ETFE. The mechanical behaviour, especially the elastic modulus, drastically increased from approx. 1000 MPa to up to 6000 MPa after uniaxial stretching. The maximum transmittance results in 95.7 % at 550 nm for stretched ETFE, whereas cast ETFE shows 95.0 % for the same process parameters.