Development of an experimental technique to assess the permeability of metal coated polymer films

Géraldine Garnier, Yves Brechet, Lionel Flandin

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)


The experimental time required to measure water vapour permeability of barrier film using the cup method is extremely long. In this study, a new technique is proposed, based on light transmission. This fast and accurate method was first validated using model films constituted of aluminized PET (polyethylene terephthalate) with aluminium layers of different thicknesses (<100 nm). It was possible to show that the 'illuminating' method could advantageously be employed to control the film's barrier properties during their fabrication. In a second step, the method was tentatively used to measure the changes in barrier properties over time, when the samples are submitted to severe hydrothermal ageing (70°C, 90% relative humidity [RH]). It was concluded that the complex degradation mechanism prevents accurate measurement while ageing.

Original languageEnglish
Pages (from-to)4692-4699
Number of pages8
JournalJournal of Materials Science
Issue number17
Publication statusPublished - Sep 2009
Externally publishedYes

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