abstract |
[Problem] To provide a polypropylene resin composition for forming a microporous film having excellent heat resistance and low thermal shrinkage. [Solution] The polypropylene resin composition for forming a microporous film of the present invention comprises a propylene homopolymer (A) satisfying the following requirements (1) to (4) and (7) as an essential component. (1) Intrinsic viscosity [η] is 1 dl / g or more and less than 7 dl / g, (2) Mesopentad fraction is in the range of 94.0 to 99.5%, (3) 100 when temperature rises (4) Melting point is 153-167 ° C, (7) Peak top temperature of maximum peak is 105-130 ° C in elution temperature-elution amount curve. It exists and the half width of the peak is 7.0 ° C. or less. |