Patent ID: 6797378
Filing Date: 2004-09-28
Classification: C08J,C08L,Y10T

Abstract:
An organic fiber filler-containing polypropylene resin composition comprising a polypropylene resin satisfying the following equation and an organic fiber filler in a proportion of 1 to 250 parts by weight of the filler per 100 parts by weight of the resin composition:log MT>4.24Ã—log [&eegr;]âˆ’1.2â€ƒâ€ƒ(1) wherein MT represents a melt tension (unit: cN) of the polypropylene resin at 230Â° C., and [&eegr;] represents an intrinsic viscosity (unit: dl/g) of the polypropylene resin measured in tetralin at 135Â° C., andthe polypropylene resin is an olefin polymer composition (A) described below or a mixture comprising the above olefin polymer composition (A) and a polypropylene base resin (B) described below, and a mixing proportion of the above polypropylene base resin (B) is 90% by weight or less based on the mixture: the olefin polymer composition (A): an olefin polymer composition comprising a mixture of (a) and (b) described below: (a) 0.01 to 5.0 parts by weight of polyethylene which is an ethylene homopolymer or an ethylene-olefin copolymer having an ethylene polymer unit of 50% by weight or more and which has an intrinsic viscosity [&eegr;E] falling in a range of 15 to 100 dl/g measured in tetralin at 135Â°C., and (b) 100 parts by weight of polypropylene which comprises a propylene homopolymer or a propylene-olefin copolymer having a propylene polymer unit of 50% by weight or more and which has an intrinsic viscosity [&eegr;P] of 0.2 to 10 dl/g measured in tetralin at 135Â°C.; and the polypropylene base resin (B): a propylene homopolymer or a propylene/&agr;-olefin copolymer comprising propylene as a principal component.