Oxygen permeation in PET bottles with passive and active walls

Renzo Di Felice, Daniela Cazzola, Sandra Cobror, Luis Oriani

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

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. Although the approach is quite general, specific attention is given to the case of liquid-filled polyethylene terephthalate (PET) bottles with oxygen as the permeating gas. 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)405-415
Number of pages11
JournalPackaging Technology and Science
Volume21
Issue number7
DOIs
Publication statusPublished - Nov 1 2008

Keywords

  • Active wall
  • Gas permeation
  • PET bottle
  • Passive wall
  • Shelf life

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

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