POLYESTERFILM FÜR LAMINIERUNG VON METALLBLECH

摘要

A film to be laminated onto a metal plate and molded, which comprises the first copolyester comprising ethylene-2,6-naphthalene dicarboxylate as a main recurring unit or a blend of the first copolyester and the second copolyester comprising ethylene terephthalate as a main recurring unit. Both the first copolyester and the blend contain diethylene glycol in an amount of 0.05 to 8 mol%. This film has a small water extraction of 0.5 mg/inch<2> or less and a center line surface roughness (Ra) of 4 to 30 nm. This film is excellent in moldability, retort resistance and taste retainability, does not spoil the taste of a refreshing drink and is also satisfactory in terms of handling property.