Abstract: The present invention provides a thermoplastic resin composition including specific amounts of (A) a polypropylene resin, (B) an elastomer, (C) inorganic filler, (D) a resin having a melt tension of 0.1 N or more and a swelling ratio of 1.8 or more and being characterized by that the time required for the resin until the ratio (G(t)/G(0.02)) of a relaxation modulus G(t) measured at 210° C. to a relaxation modulus G(0.02) at a time of 0.02 sec reaches 0.01 is 10 sec or more, and (E) a resin characterized by that, with respect to a swelling ratio measured at 220° C. at an L/D of an orifice of 40, the ratio of a swelling ratio (SR103) at a shear rate of 2.4×103 sec?1 to a swelling ratio (SR102) at a shear rate of 1.2×102 sec?1, SR103/SR102, is from 1.0 to 1.1.

Abstract: Disclosed is a thermoplastic resin composition that contains specific amounts of polypropylene resin (A), elastomer (B), inorganic filler (C) and resin (D) which is composed of 60 to 80% by weight of a first segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 5 dl/g or more and 20 to 40% by weight of a second segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 0.8 to 1.2 dl/g.

Abstract: Disclosed is a thermoplastic resin composition that contains specific amounts of polypropylene resin (A), elastomer (B), inorganic filler (C) and resin (D) which is composed of 60 to 80% by weight of a first segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 5 dl/g or more and 20 to 40% by weight of a second segment which is a propylene homopolymer or a propylene-ethylene random copolymer and has an intrinsic viscosity, measured in tetralin at 135° C., of 0.8 to 1.2 dl/g.

Abstract: Disclosed is a polypropylene resin composition comprising (A) from 40 to 98% by weight of polypropylene resin, (B) from 1 to 30% by weight of basic magnesium sulfate fiber having a surface treated with montan wax wherein fibers contained in primary fibers have an average fiber length of from 7 to 10 &mgr;m and the percentage of primary fibers containing fibers having a fiber length of 20 &mgr;m or more is 10% by weight or less and (C) from 1 to 30% by weight of talc, provided that the total weight of the components (A), (B) and (C) is adjusted to 100% by weight.

Abstract: Disclosed is a thermoplastic resin composition comprising specific amounts of (A) a polypropylene resin, (B) an elastomer, (C) inorganic filler, (D) a resin having a melt tension of 0.1 N or more and a swelling ratio of 1.8 or more and being characterized by that the time required for the resin until the ratio (G(t)/G(0.02)) of a relaxation modulus G(t) measured at 210° C. to a relaxation modulus G(0.02) at a time of 0.02 sec reaches 0.01 is 10 sec or more, and (E) a resin characterized by that, with respect to a swelling ratio measured at 220° C. at an L/D of an orifice of 40, the ratio of a swelling ratio (SR103) at a shear rate of 2.4×103 sec−1 to a swelling ratio. (SR102) at a shear rate of 1.2×102 sec−1, SR103/SR102, is from 1.0 to 1.1.

Abstract: A thermoplastic composition which is obtained by melt-kneading (1) 55 to 75 wt. % crystalline polypropylene resin together with (2) 10 to 30 wt. % elastomer comprising either a rubber containing a vinyl aromatic compound or a mixture thereof with an ethylene/&agr;-olefin random copolymer rubber and (3) 15 to 25 wt. % talc having an average particle diameter of 3 &mgr;m or smaller. The composition satisfies specific requirements with respect to: the long period obtained by X-ray small-angle scattering attributable to the vinyl aromatic-containing rubber in a blend obtained by melt-kneading the ingredients (1) and (2); the shape and diameter of the elastomer particles present near the polypropylene/elastomer interface in the blend; and the difference between the glass transition point of the ingredient (1) and that of the composition attributable to the crystalline polypropylene homopolymer parts.

Abstract: Disclosed is a thermoplastic resin composition comprising (A) 35 to 85% by weight of a polypropylene resin, (B) 10 to 35% by weight of an elastomer, (C) 2 to 30% by weight of an inorganic filler and (D) 5 to 15% by weight of a resin, wherein the resin (D) has a melt tension (MT), measured at a winding speed of 15.7 m/min, of not less than 0.03 N and less than 0.1 N and a swelling ratio (SR), measured at 220° C., an L/D of an orifice of 40 and a shear rate of 1.2×103 sec−1, of 1.8 or more, and the time required for the resin (D) until the ratio (G(t)/G(0.02)) of the relaxation elastic modulus G(t) measured at 210° C. to the relaxation elastic modulus G(0.02) in a time of 0.02 second reaches 0.01 is not less than 5 seconds and less than 10 seconds.

Abstract: A thermoplastic resin composition comprising: (A) polypropylene-based resin selected from the group consisting of a propylene homopolymer, an ethylene-propylene block copolymer composed of a propylene homopolymer portion and ethylene-propylene random copolymer portion having an intrinsic viscosity measured in tetralin at 135° C. of 1.0 or more and less than 8.0 dl/g and a mixture thereof, of 35 to 85 wt %; (B) elastomer of 10 to 35 wt %; (C) inorganic filler of 2 to 30 wt %; and (D) resin of 0.1 wt % or more and less than 5 wt %, wherein (1) the melt tension of (D) at 190° C. and a winding rate of 15.7 m/min. is 0.1 N or more, (2) the swelling ratio of (D) at 220° C., an L/D ratio of an orifice of 40 and a shear rate of 1.2×103 sec−1 is 1.8 or more, and (3) the time required until the ratio (G(t)/G(0.02)) of the relaxation modulus G(t) at 210° C. to that G(0.02) in a time of 0.02 sec. reaches 0.01, of (D) is 10 sec. or more.

Abstract: Disclosed is a thermoplastic resin composition comprising (A) 35 to 85% by weight of a polypropylene resin, (B) 10 to 35% by weight of an elastomer, (C) 2 to 30% by weight of an inorganic filler and (D) 5 to 15% by weight of a resin, wherein the resin (D) has a melt tension (MT), measured at a winding speed of 15.7 m/min, of not less than 0.03 N and less than 0.1 N and a swelling ratio (SR), measured at 220° C., an L/D of an orifice of 40 and a shear rate of 1.2×103 sec−1, of 1.8 or more, and the time required for the resin (D) until the ratio (G(t)/G(0.02)) of the relaxation elastic modulus G(t) measured at 210° C. to the relaxation elastic modulus G(0.02) in a time of 0.02 second reaches 0.01 is not less than 5 seconds and less than 10 seconds.

Abstract: Disclosed is a polypropylene resin composition comprising (A) from 40 to 98% by weight of polypropylene resin, (B) from 1 to 30% by weight of basic magnesium sulfate fiber having a surface treated with montan wax wherein fibers contained in primary fibers have an average fiber length of from 7 to 10 &mgr;m and the percentage of primary fibers containing fibers having a fiber length of 20 &mgr;m or more is 10% by weight or less and (C) from 1 to 30% by weight of talc, provided that the total weight of the components (A), (B) and (C) is adjusted to 100% by weight.

Abstract: A polypropylene resin composition comprising: 95 to 80% by weight of a polypropylene resin (A) consisting of a propylene-ethylene block copolymer (i) composed of a propylene homopolymer portion having an intrinsic viscosity [&eegr;]AP of not more than 1.3 dl/g, and a propylene-ethylene random copolymer portion having an intrinsic viscosity [&eegr;]AEP of not more than 3.0 dl/g, or a mixture (ii) of the propylene-ethylene block copolymer (i) and a propylene homopolymer; and 5 to 20% by weight of a propylene-ethylene block copolymer (B) having a propylene-ethylene random copolymer portion having an intrinsic viscosity [&eegr;]BEP of from 8.0 to 15 dl/g, wherein the polypropylene resin composition has a melt flow rate (MFR) of from 5.0 to 150 g/10 min. and the sum of the (A) and (B) is 100% by weight.

Abstract: A polypropylene resin composition comprising:

Abstract: A thermoplastic resin composition comprising:

Abstract: A polypropylene-based resin composition comprising: (1) 95 to 50% by weight of a polypropylene-based resin (A) of a mixture of the following (i) and (ii); (i) a crystalline propylene-ethylene block copolymer comprising a propylene homopolymer portion as a first segment and a propylene-ethylene random copolymer as a second segment, said propylene-ethylene block copolymer having a melt flow rate at 230° C. measured according to JIS-K-6758 of not less than 25 g/10 min., and (ii) a crystalline propylene homopolymer having a melt flow rate at 230° C. measured according to JIS-K-6758 of not less than 70 g/10 min.

Abstract: A polypropylene-based resin composition comprising:(1) 55 to 75% by weight of a polypropylene-based resin (A) selected from the following (i) and (ii);(i) a crystalline propylene-ethylene block copolymer composed of a propylene homopolymer portion as a first segment and a propylene-ethylene random copolymer as a second segment, and (ii) a mixture of the crystalline propylene-ethylene block copolymer (i) and a crystalline propylene homopolymer;(2) 10 to 15% by weight of an ethylene-octene copolymer rubber (B) having a melt flow rate (measured according to JIS-K-6758, 190.degree. C.) of 0.5 to 10 g/min., an octene content of 20 to 25% by weight and a density of 0.860 to 0.875; and(3) 15 to 30% by weight of talc (C) having an average particle diameter of not more than 3 .mu.m, the total amount of (A), (B) and (C) being 100% by weight, wherein said polypropylene-based resin composition satisfies the following expression:0.25.ltoreq.(A)'/[(A)'+(B')].ltoreq.0.