POLYESTER FOAM FOR USE IN A MODIFIED ATMOSPHERIC PACKAGE

摘要

A modified atmospheric package for containing foodstuffs without spoilage is made from a tray of a foamed thermoformable polyester and a film lid of a non-thermoformed polymer. The foamed polyester is made from repeat units from an acid component of at least 65 mole percent terephthalic acid or naphthalenedicarboxylic acid and repeat units from a glycol component of at least 65 mole percent ethylene glycol or 1,4-cyclohexanedimethanol.