Patent ID: 8715554

Claim:
A method for manufacturing a film for a film capacitor comprising the steps of: charging an extruding equipment with a molding material to extrude a film for a film capacitor from an extruding dice and interposing the extruded film between plural rolls to cool the extruded film, wherein: 100 parts by mass of at least a polyetherimide resin is blended with 1 to 10 parts by mass of a fluorocarbon resin to prepare the molding material; the molding material is extruded through a filter having apertures which are 0.5 to 6 times or less as large as an average thickness of the extruded film, the filter being provided between the extruding equipment and the extruding dice; the thickness of the extruded film is controlled to 10 μm or less; and the method excludes biaxial stretching.