Patent ID: 6525138
Filing Date: 2003-02-25
Classification: C08L

Abstract:
A thermoplastic resin composition comprising:(A) 5 to 95% by weight of a thermoplastic resin having a melt flow rate of from 0.001 to 100 g/10 min. measured at a temperature of 230Â° C. under a load of 2.16 kg and a die swell ratio of not less than 1,7, wherein the thermoplastic resin comprises a polyolefin resin, and (B) 95 to 5% by weight of an olefin polymer comprising an ethylene unit and an &agr;-olefin unit of 3 to 20 carbon atoms, and satisfying the following formula (1), Ua&lE;1,5Ã—SaÃ—(Ta/100)3.3â€ƒâ€ƒ(1) â€ƒwherein: (i) Ua is a flexural modulus (MPa) of a resin composition for evaluation measured according to JIS K7203, which composition is composed of 50 parts by weight of said olefin polymer and 50 parts by weight of a homopolypropylene resin having a flexural modulus (Sa) of 1400Â±100 MPa measured according to JIS K7203, a melt flow rate of 12Â±3 g/10 min. measured at a temperature of 230Â° C. under a load of 2.16 kg and a peak position (melting point) on crystal melting of 162Â±2Â° C. measured by a differential scanning calorimeter (DSC) according to JIS K7122, (ii) Sa is a flexural modulus (MPa) of said homopolypropylene resin measured according to JIS K7203, and (iii) Ta is a containing ratio (50% by weight) of said homopolypropylene resin in the resin composition for evaluation, provided that the sum of the component (A) and the component (B) is 100% by weight, and wherein the olefin polymer comprises a non-crystalline olefin polymer showing neither a peak of not less than 1 J/g on crystal melting nor a peak of not less than 1 J/g on crystallization, when measured with a differential scanning calorimeter (DSC) according to JIS K7122.