DIFFERENT AXIS ORIENTATION POLYESTER FILM FOR CONDENSER AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A different axis orientation polyester film is provided to be suitable to a condenser and to increase a breaking voltage caused by a continuous electric source. CONSTITUTION: A different axis orientation polyester film is composed of: a polyester resin layer(A resin layer) for including at least one kind of insoluble particle; and two polyester resin layers(B resin layer, C resin layer) being formed on the both surfaces of the polyester resin layer(A resin layer). Herein, the resin layer includes the insoluble particle having an average particle diameter as 1.5 ¯ 3.5 micrometers and a content as 0.05 ¯ 3.0 wt% while the B resin layer and the C resin layer do not include the insoluble particle.