| abstract |
One embodiment of the present invention provides a laminated polyester film, a method for producing the same, a solar cell protective sheet and a solar cell module including the laminated polyester film, the laminated polyester film comprising: a biaxially stretched polyester film, Produced by extending the unstretched polyester film in the first direction, and extending along the film surface in the second direction orthogonal to the first direction, and derived heat measured by differential scanning calorimetry The micro-peak temperature of the fixed temperature is 160° C. or higher and 210° C. or lower; and the primer layer is obtained by applying the primer layer-forming composition to the polymer stretched in the first direction before extending in the second direction. One surface of the ester film is formed by extending in the second direction, and has an elastic modulus of 0.7 GPa or more. |