Abstract: This invention relates to a thermoplastic elastomer composition comprising 5 to 30 parts by mass of ethylene-?-olefin-non-conjugated polyene copolymer (A), 20 to 40 parts by mass of crystalline olefin-based resin (B) having a density of 0.90 g/cm3 or more and 0.92 g/cm3 or less, 20 to 40 parts by mass of high-density polyethylene (C) having a density of 0.94 g/cm3 or more and 0.97 g/cm3 or less, 5 to 12 parts by mass of ethylene-?-olefin copolymer (D) consisting of ethylene and ?-olefin having 3 to 12 carbon atoms, and 5 to 9 parts by mass of silicone compound (E) (with the total amount of (A), (B), (C), (D) and (E) being 100 parts by mass), and to an automotive glass run channel formed by the thermoplastic elastomer composition.

Abstract: Resin composition comprises 35 to 59.9 parts by mass of a propylene polymer (A) satisfying below; 25 to 40 parts by mass of a soft propylene copolymer (B); 0.1 to 10 parts by mass of a polyolefin (C) containing a structural unit derived from an unsaturated carboxylic acid and/or a derivative thereof; and 15 to 30 parts by mass of an ethylene polymer (D) (provided that the total of (A), (B), (C), and (D) is 100 parts by mass), wherein an MFR measured at 230° C. and a load of 2.16 kg according to ASTM D-1238 is 7 g/10 min or more and 25 g/10 min or less, with each component satisfying certain requirements.

Abstract: This invention relates to a thermoplastic elastomer composition comprising 5 to 30 parts by mass of ethylene-?-olefin-non-conjugated polyene copolymer (A), 20 to 40 parts by mass of crystalline olefin-based resin (B) having a density of 0.90 g/cm3 or more and 0.92 g/cm3 or less, 20 to 40 parts by mass of high-density polyethylene (C) having a density of 0.94 g/cm3 or more and 0.97 g/cm3 or less, 5 to 12 parts by mass of ethylene-?-olefin copolymer (D) consisting of ethylene and ?-olefin having 3 to 12 carbon atoms, and 5 to 9 parts by mass of silicone compound (E) (with the total amount of (A), (B), (C), (D) and (E) being 100 parts by mass), and to an automotive glass run channel formed by the thermoplastic elastomer composition.

Abstract: Disclosed is a poly(4-methyl-1-pentene) resin composition having an excellent balance between micropore formability and toughness, which can sufficiently form fine pores by drawing and does not cause a break during drawing. The poly(4-methyl-1-pentene) resin composition contains 0-90 parts by mass of a 4-methyl-1-pentene homopolymer (A) and 10-100 parts by mass of a 4-methyl-1-pentene copolymer (B) having a structural unit derived from 4-methyl-1-pentene and a structural unit derived from a C2-20 ?-olefin other than 4-methyl-1-pentene. The content of the structural unit derived from a C2-20 ?-olefin other than 4-methyl-1-pentene is 0.1-2.1% by mass relative to the total amount of the homopolymer (A) and the copolymer (B). The poly(4-methyl-1-pentene) resin composition also contains 0.1-800 ppm of a nucleator (C) relative to the total weight of the homopolymer (A) and the copolymer (B).

Abstract: Disclosed is a poly(4-methyl-1-pentene) resin composition having an excellent balance between micropore formability and toughness, which can sufficiently form fine pores by drawing and does not cause a break during drawing. The poly(4-methyl-1-pentene) resin composition contains 0-90 parts by mass of a 4-methyl-1-pentene homopolymer (A) and 10-100 parts by mass of a 4-methyl-1-pentene copolymer (B) having a structural unit derived from 4-methyl-1-pentene and a structural unit derived from a C2-20 ?-olefin other than 4-methyl-1-pentene. The content of the structural unit derived from a C2-20 ?-olefin other than 4-methyl-1-pentene is 0.1-2.1% by mass relative to the total amount of the homopolymer (A) and the copolymer (B). The poly(4-methyl-1-pentene) resin composition also contains 0.1-800 ppm of a nucleator (C) relative to the total weight of the homopolymer (A) and the copolymer (B).