Retortable food containers containing a water-sensitive oxygen barrier

Montgomery Meigs Alger, Tom Stanley, Jill Cyr

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Multilayer food packages containing EvOH (ethylene vinyl alcohol copolymer) as the oxygen barrier are used to protect a range of oxygen-sensitive food products. Often these food packages must be steam retorted for sterilization. During retort the EvOH layer is subjected to a large water pressure resulting in substantial water sorption. A problem with EvOH is that its excellent oxygen barrier is seriously reduced at high humidity. Therefore, immediately following retort, the wet EvOH offers a reduced resistance to oxygen permeation. As the EvOH dries to a 'steady-state' profile, the barrier properties recover, but a significant amount of oxygen can pass through the package wall during the dry-out stage. This work was undertaken to develop both an experimental and theoretical understanding of multilayer EvOH structures made with both polypropylene and polycarbonate structural layers.

Original languageEnglish (US)
Pages (from-to)24-25
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume30
Issue number1
StatePublished - Apr 1989

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics

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