| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminium plate laminating polyester film for molding a capacitor case, which is particularly suitable for a molding of the capacitor case, by a method, where the polyester film is superior in its follow-up properties to a molding of an aluminium plate and moreover, the polyester film is superior in the adhesion of the polyester to the aluminium plate and its corrosion protection properties to the aluminium plate and furthermore, the polyester film holds favorably these advantages even after its heat history. SOLUTION: A capacitor case laminating polyester film is characterized by that the polyester film comprises a copolymer polyester of a melting point of 210 to 245 deg.C, the polyester film is a film of a plane orientation coefficient of 0.10 to 0.16 and stresses in the polyester film at the time of the extension of 100% of the polyester film at 100 deg.C in the MD direction and the TD direction are respectively in the range of 10 to 150 MPa and a laminated aluminium material for the capacitor case and the capacitor case are formed using the polyester film.
|
