BOPP film with high AC breakdown strength

摘要

Polypropylene composition comprising a polypropylene and an a-nucleating agent, wherein the polypropylene composition has °a comonomer content of equal or below 1.0 wt.-%, °<2,1> erythro regiodefects of more than 0.1 mol.-%, and °at least 9.0wt-% of a crystalline fraction crystallizing in the temperature range of above 160 to 170 °C, wherein said fraction is determined by the stepwise isothermal segregation technique (SIST).