| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polyester film excellent in the smoothness of the film surface and the handling of the film and suitably utilizable as a film for producing a resin film.SOLUTION: Provided is a polyester film for producing a resin film made of a constitution of two or more layers, in which either surface layer (A1 layer) includes lubricant particles, the ten point average roughness (Rz) of the other surface layer (A2 layer) is 20.0 nm or lower, and also, its air leakage index is 100,000 s or lower.</p> |
