| abstract |
According to the present invention, a film obtained by biaxially stretching a cast disk sheet of crystalline isotactic polypropylene resin is 1.0 µm or more and 8.0 µm or less, and has a weight average molecular weight Mw of 250,000 or more as measured by gel permeation chromatography. , 450,000 or less, molecular weight distribution Mw / Mn is 4 or more, 7 or less, and in the molecular weight distribution curve, the difference obtained by subtracting the derivative distribution when the log molecular weight is 6 from the differential distribution value when the log molecular weight is 4.5 It is related with the biaxially stretched polypropylene film for capacitor | condensers which are 2% or more and 15% or less, and the mesopentad fraction calculated | required by high temperature nuclear magnetic resonance measurement is 94% or more and less than 98%. |