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The Effect of Liquid Absorption on Gas Barrier Properties of Triplex Film Coated with Silicon Oxide

Kata Galić* and Nada Ciković


Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia


Article history:

Received: March 24, 2003
Accepted: June 9, 2003

Key words:

barrier properties, SiOx, temperature, test solutions, triplex film

Summary:

Polymeric triplex film with SiOx deposit (polyethylene terephthalate/polyethylene terephthalate+ SiOx/polyethylene) was analysed for its gas permeance characteristics. For this purpose the permeance of triplex film to oxygen, nitrogen and carbon dioxide was analysed before and after the immersion into the test solutions (ethanol, acetic acid and distilled water). Gas permeance measurements were performed in temperature range from 20 to 60 °C. The permeability of the treated triplex film (181–241 cm3m–2 d–1 bar–1) showed negligible changes in comparison with the untreated ones (164–257 cm3 m–2 d–1 bar–1). Due to the existence of inflection point at 40 oC, the Arrhenius equation was applied in narrow temperature ranges (20–35 oC and 40–60 oC). The obtained activation energies for the permeance of gases were correlated with different physical characteristics of permeates.



*Corresponding author:           kgalic@pbf.hr
                                               ++385 46 05 411
                                               ++385 48 36 083

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