摘要：

A biaxially oriented polyester film which is characterized as follows: (A) it is composed of an aromatic copolyester which is obtained with use of a germanium compound as the polycondensation catalyst, the copolyester having a melting point in the range from 210° to 245° C. and a glass transition temperature not lower than 50° C., (B) it has a refractive index in the thickness direction in the range from 1.505 to 1.55 and a refractive index in the plane direction in the range from 1.61 to 1.66, and (C) it exhibits excellent shaping processability when it is laminated onto a metal sheet and subjected to deep drawing. This film exhibits excellent shaping processability, heat resistance, resistance to embrittlement under retort treatment, and flavor retention and is useful for coating inner and outer surfaces of metal cans such as those containing beverage or food.

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