A polypropylene resin composition having a melt flow rate of 70 to 120 g/10 min
(at 230 C., 2.16 kgf-load), a flexural modulus of 1300 to 4000 MPa and an
IZOD impact strength of 30 to 100 kJ/m2, wherein the composition is
obtained by adding a small amount of an organic peroxide to a mixture comprising
60 to 80% by weight of a specific propylene-ethylene block copolymer made up of
a propylene homopolymer portion and a propylene-ethylene random copolymer portion,
a rubber which is a copolymer of ethylene and at least one -olefin having
a melt flow rate of 2 to 10 g/10 min (at 190 C., 2.16 kgf-load), and inorganic
filler (C), and kneading the combined ingredients at a temperature of 170 to 280 C.
