MULTI-LAYERED POLYESTER VESSEL AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a multi-layered polyester vessel showing excellence in transparency and a gas barrier property even in case of using a functional resin or a functional resin composition each having a big extension stress as an intermediate layer.

SOLUTION: The multi-layered polyester vessel comprising inner and outer layers of a polyester and at least one intermediate layer of a functional resin keeps the difference of tanδbetween 80°C and 60°C by dynamic viscoelasticity (DMS) measurement at 0.5 Hz below 0.035.

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