/- The use of a transparent polyester film as a gas/flavor-barrier film

摘要

The present invention is more than 80% by weight of at least 40% by weight of the base layer and an ethylene 2,6-naphthalate unit made of a thermoplastic polyester and an ethylene terephthalate unit and / or a cycloaliphatic or aromatic diols and / or dicarboxylic acid units from the back of the at least one external layer made of a mixture of polymer or polymers containing less than 60% by weight, and only the polyester film of the T _g 2 value is less than T _g 2 value of the above T _g 2 value of the base layer and the outer layer, having a barrier film for the gas _{H 2 O, N 2, CO} 2, He and smell, to a transparent biaxially oriented polyester film for use. The present invention for packaging purpose, it is particularly suitable especially in food packaging and other supplies to.