| abstract |
(57) [Problem] To provide a laminated polyester film excellent in transparency, heat resistance, hot water resistance, impact resistance, gas barrier properties and the like. A laminated polyester sheet comprising a core layer and a skin layer laminated on one or both surfaces thereof, having an intrinsic viscosity of 0.60 dl / g or more and a skin layer thickness of 5 to 40% of the whole, Each of the core layer and the skin layer contains 50 mol% or less of cyclohexanedimethanol as a polyol component, and the ratio of naphthalenedicarboxylic acid to the acid component of the core layer and the skin layer is 5 to 74. Mol% and 75 to 98 mol%. |