| 摘要 |
PURPOSE:To improve running property and shaving resistance of a film at the time of manufacture of a capacitor and improve moisture resistance at the time of loading of voltage by layering a surface layer, wherein a relationship of a three-dimensional surface roughness and a glass transition temperature is specified, on a styrene polymer film having a syndiotactic structure. CONSTITUTION:On at least one face of a film consisting of a styrene polymer having a syndiotactic structure, a surface layer is layered. A relationship between three-dimensional surface roughnesses SRa(mum), Slambdaa(mum) and a glass transition temperature is made to be SRa>=0.01+0.02X(Tgc-Tgs)/Tgc. 3+4X(Tgc-Tgs)/Tgc<=Slambdaa<=20+10X(Tgc-Tgs)/Tgc. Here, Tgc represents a glass transition temperature of the syndiotactic polystyrene film layer and Tgs represents a glass transition temperature of the surface layer. A laminated film satisfies this relationship. |
