| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated polyester film having excellent adhesiveness to a functional layer such as a hard coat layer in a moisture heat environment and substantially preventing generation of interference speckles of light (irregular color appearance).SOLUTION: The laminated polyester film has a coating layer containing 70 mass% or more of the following copolymer polyester, on the basis of the mass of the coating layer, formed on at least one surface of an oriented polyethylene terephthalate film. The copolymer polyester contains: 60 to 90 mol% of a naphthalene dicarboxylic acid component; 15 to 50 mol% in total of an alkylene dicarboxylic acid component having 6 to 12 carbon atoms and an alkylene glycol component having 4 to 10 carbon atoms; 5 mol% or more and less than 20 mol% of a glycol component having a fluorene structure; and 0.1 to 5 mol% of a dicarboxylic acid component having a sulfonate group. |
