| abstract |
An object of the present invention is to provide a white polyester film for solar cells that is excellent in transfer mark concealing property (making it difficult to see transferred irregularities) while maintaining high whiteness and good light resistance and hydrolysis resistance. An object of the present invention is to provide a solar cell back surface sealing sheet and a solar cell module. The white polyester film for solar cells of the present invention has a whiteness of 50 or more, an average reflectance of 50 to 95% in a wavelength range of 400 to 800 nm, an acid value of 1 to 50 eq / ton, and a thickness of 30 to 380 μm. A white polyester film for a battery, wherein the film has a multilayer structure in which at least one outermost layer is a polyester resin layer having a content of inorganic fine particles of 10 to 38% by mass, on the surface of the polyester resin layer, The full width at half maximum of the protrusion distribution plotting the protrusion number density against the protrusion height is 200 to 1000 nm. |