Prediction of shelf-life of beverage stored in pet bottles with passive and active walls

Renzo Di Felice, D. Cazzola, S. Cobror, L. Oriani

Research output: Contribution to journalArticlepeer-review


The aim of this paper is to provide a framework whereby gas permeation rates through plastic packaging walls, and hence food shelf life, may be estimated. Two situations are considered: when the walls simply provide a passive resistance to the flux (as is the case for standard PET or PET blended with some other low permeability material) and when an active gas scavenger is incorporated within the boundary material. For the passive wall, permeability data relative to oxygen have been collected from literature sources and also measured using specific oxygen transmission rate experiments. For the active walls, scavenger kinetic constants were estimated from data obtained using test bottles prepared with varying scavenger concentrations. Numerical predictions in both cases have been verified by comparison with data on gas concentration in water filled bottles maintained under controlled conditions for periods of up to 6 months.

Original languageEnglish
Pages (from-to)3-6
Number of pages4
JournalItalian Journal of Food Science
Issue number2
Publication statusPublished - Jan 1 2008


  • Active wall
  • Food packaging
  • Passive wall
  • PET bottles
  • Shelf-life

ASJC Scopus subject areas

  • Food Science

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