Multilayer coatings for flexible high-barrier materials

• Authors: Karol VaÅ¡ko , Klaus Noller , Milan Mikula , Sabine Amberg-Schwab , Ulrike Weber
• Languages of publication: EN

Abstracts

EN

A multilayer, flexible, and transparent high-barrier system based on flexible plastic foils, polyethyleneterephthalate (PET) and ethylene-tetrafluoroethylene-copolymer (ETFE), combined with vacuum-deposited, inorganic SiOx layers and hybrid ORMOCER® varnish layers were prepared in different orders on a semiproduction level. Barrier properties of prepared systems, as water vapour transmission (WVTR) and oxygen transmission (OTR), were measured and studied in connection with surface energy, surface topography, and water vapour adsorption properties. Correlations among layers sequence, barrier properties, and other parameters are presented, including some basic principles of permeation of substances through multilayer barrier systems. A combination of several inorganic and hybrid varnish layers is necessary to achieve the technological demands from a barrier standpoint. It is easier to suppress the oxygen transport than the water transport, due to the additional active penetration of water through hydrogen bonds and silanol creations at oxide interfaces, capillary condensation, and swelling with high internal pressure, leading to new defects.

Keywords

EN

multilayer; permeation barrier; polymer; SiOx ; coating

Discipline

• 66.30.-h: Diffusion in solids(for surface and interface diffusion, see 68.35.Fx)
• 81.15.-z: Methods of deposition of films and coatings; film growth and epitaxy(for structure of thin films, see 68.55.-a; see also 85.40.Sz Deposition technology in microelectronics; for epitaxial dielectric films, see 77.55.Px)
• 82.35.-x: Polymers: properties; reactions; polymerization(for polymers in electrochemistry, see 82.45.Wx)

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2009
• Volume: 7
• Issue: 2
• Pages: 371-378

Dates

published

1 - 6 - 2009

online

26 - 4 - 2009

Contributors

author

Karol Vaško

• Fraunhofer Institute for Process Engineering and Packaging, Freising, Germany

author

Klaus Noller

• Fraunhofer Institute for Process Engineering and Packaging, Freising, Germany

author

Milan Mikula

• Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovakia

author

Sabine Amberg-Schwab

• Fraunhofer Institute for Silicate Research, Würzburg, Germany

author

Ulrike Weber

• Fraunhofer Institute for Silicate Research, Würzburg, Germany

References

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Identifiers

DOI

10.2478/s11534-009-0056-2