Patent ID: 7923502

Claim:
A polypropylene-based resin composition comprising a propylene-based block copolymer (A) which satisfies features (a), (b) and (c) shown below and has a melt flow rate of from 5 to 100 g/10 min, measured at a temperature of 230° C. and a load of 2.16 kgf, and a zeolite (B) being a compound represented by the formula (I): x M 2 /n O.Al 2 O 3 .y SiO 2 .z H 2 O wherein M represents an element of Group IA or IIA of the Periodic Table, n represents an atomic value of M, x represents a number more than 0, y represents a number of 20 to 60, and z represents a number of 0 to 7, the zeolite (B) having a molar ratio SiO 2 /Al 2 O 3 of 20 to 60 and having a crystalline structure called ZSM-5 type, in an amount of 0.01 to 0.4 part by weight based on 100 parts by weight of the propylene-based block copolymer (A): Feature (a): the propylene-based block copolymer (A) is a propylene-based block copolymer containing a polymer component (I) and a polymer component (II), wherein the polymer component (I) is a propylene-based polymer having an intrinsic viscosity ([η] I ) measured in tetralin at 135° C. of 0.1 to 1.5 (dl/g), and the polymer component (II) is a propylene-based copolymer having units derived from at least one kind of comonomer selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms and units derived from propylene, which copolymer has an intrinsic viscosity ([η] II ) measured in tetralin at 135° C. of 1 to 20 (dl/g); Feature (b): the polymer component (II) has a content of the units derived from at least one kind of comonomer selected from the group consisting of ethylene and α-olefins having 4 to 12 carbon atoms of from 1 to 80% by weight; and Feature (c): the propylene-based block copolymer (A) has a content of the polymer component (II) of from 5 to 70% by weight.