Elongation properties of multilayer PECVD barrier coatings on PET films
While SiOx coatings grant high oxygen and water vapour barrier properties, the highly cross-linked structure causes the barrier to become vulnerable to elongation. In order to improve performance of stretched SiOx coatings, an attempt that has been followed is the deposition of multilayer structures. These consist of dyad layers, which combine an inorganic barrier layer (SiOx ) and an organic interlayer (SiOCH). In this paper the effects of layer order and stacking number on the oxygen barrier properties and crack density of stretched multilayer coatings on 23 μm PET-films are discussed.
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