| abstract |
An embodiment of the invention provides a laminated polyester film and a method for producing the same, a protective sheet for solar cells that includes the laminated polyester film, and a solar cell module. The laminated polyester film includes: a biaxially oriented polyester film, produced by stretching an unstretched polyester film in a first direction and in a second direction orthogonal to the first direction along a film surface, and having a small peak temperature of 160 to 210°C derived from a heat setting temperature measured by differential scanning calorimetry; and an undercoat layer, formed by coating a surface of the polyester film stretched in the first direction with a composition for forming an undercoat layer before stretching the polyester film in the second direction, and then stretching the polyester film in the second direction, and having an elastic modulus of 0.7 GPa or more. |