The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2025
Filed:
Feb. 20, 2020
Toray Industries, Inc., Tokyo, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
Provided are a polypropylene film that has excellent structural stability relative to heat, is suitable for use in high-voltage capacitors or the like, and, when used in a high-voltage capacitor, has excellent long-term reliability in high-temperature environments; a metal layer laminated film that uses the polypropylene film; and a film capacitor. The polypropylene film has the sum of F5 values for the longitudinal direction and the width direction at 130° C. of at least 15 MPa and, for dielectric breakdown testing at 130° C., a dielectric breakdown voltage (B150) (V/μm) after heat treating for 1 minute at 150° C. and a dielectric breakdown voltage (B0) (V/μm) without heat treating satisfy the following relationship.(150)/(0)≥0.80