GAS BARRIER POLYESTER FILM AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a polyester film which excels in transparency and gas barrier properties and is used for such as food packaging.;SOLUTION: The polyester film is composed of polytrimethylene terephthalate (PTT) and/or polytetramethylene terephthalate (PBT) and poly-m-xylylene diadipamide (MXD6) at a ratio (wt.%) of 60-90 to 40-10. A method for manufacturing a gas barrier polyester film comprises stretching an unstretched film in the lengthwise and crosswise directions by the simultaneous biaxial stretching method in manufacturing this film.;COPYRIGHT: (C)2002,JPO