Patent ID: 7914899
Filing Date: 2011-03-29
Classification: C08F,H01B,Y10T

Abstract:
1. An electrical insulation film comprising a polypropylene material, at least one of the electrical insulation film and the polypropylene material comprising: a) xylene solubles in the range of about 0.5 percent to about 1.5 percent by weight; and b) a crystalline fraction crystallizing in the temperature range of 200 to 105° C. determined by stepwise isothermal segregation technique, said crystalline fraction comprising a part; wherein, during subsequent melting at a melting rate of 10° C./min, said part melts at or below 140° C. and said part represents at least 10 percent by weight of said crystalline fraction and wherein said electrical insulation film is a capacitor film.