Patent ID: 8367199
Filing Date: 2013-02-05
Classification: B32B,C08J,C08L,Y10S,Y10T

Abstract:
1. A single layered or laminated biaxially oriented film comprising a thermoplastic resin composition (c) of a polyethylene-2,6-naphthalene dicarboxylate and a syndiotactic styrene polymer having a melting point of from 230 to 280° C., wherein the ratio of the syndiotactic styrene polymer is from 5 to 30% by weight based on the entire weight of the film, and the film thickness is from 1 to 10 μm, wherein the breakdown voltage of the biaxially oriented film exceeds 460 V/μm and the heat resistant temperature of the biaxially oriented film is 110° C. or higher and the syndiotactic styrene polymer in the film comprising the thermoplastic resin composition (c) is dispersed in an island shape.