| 摘要 |
Provided is a polyester film which highly satisfactorily high moist-heat resistance, flame retardancy, and other properties (in particular, ultraviolet light resistance, light-reflecting properties, etc.) over a long period. Also provided are: a solar-cell back sheet which comprises the polyester film and hence has high durability; and a solar cell including the back sheet. The polyester film has a laminate structure comprising a polyester layer (layer P1) containing a crystalline polyester and inorganic particles and a polyester layer (layer P2) containing a crystalline polyester, inorganic particles, and an antihydrolysis segment, wherein the content (Wa2) of the inorganic particles in the layer P2 is at least 10 mass% of the layer P2, the difference between the content (Wa2) (mass%) of the inorganic particles in the layer P2 and the content (Wa1) (mass%) of the inorganic particles in the layer P1, Wa2-Wa1, is 5 to 25 mass%, and the content (Wb2) of the antihydrolysis segment in the layer P2 is 0.02 to 1.5 mass% of the layer P2. |
