| abstract |
Disclosed are compositions having improved resistance to oxygen and carbon dioxide permeability comprising a copolyester derived from an acid component consisting essentially of 55-99 mol % terephthalic acid, 45-1 mol % of at least one acid of the formula HOOC-(CH2)n-COOH where n is 1 to 6, and a glycol component, at least 60 mol % of which is ethylene glycol, the copolyester having an I.V. of about 0.1-1.5. |