Metal layer-integrated polypropylene film, film capacitor, and metal layer-integrated polypropylene film manufacturing method

摘要

A polypropylene film integrated with a metal layer having a polypropylene film and a metal layer laminated on one or both sides of the polypropylene film, wherein the thermal contraction rate in the first direction of the polypropylene film before laminating the metal layer is A, When the thermal contraction rate in one direction is B, the thermal contraction rate ratio of the thermal contraction rate A and the thermal contraction rate B [(heat contraction rate B)/(heat contraction rate A)] is 0.25 or more and 0.60 or less.