Patent ID: 6107388
Filing Date: 2000-08-22
Classification: C08L

Abstract:
A polyolefin resin composition (A) comprising:(a) from 83 to 88% by weight high-rigidity polypropylene/propylene-ethylene block copolymer consisting of from 60 to 95% by weight of a propylene homopolymer component which has an isotactic pentad content (P) of 0.96 or higher and an M.sub.w /M.sub.n (Q value) of 6 or lower and in which the ratio of the maximum value of melt flow rate (MFR.sub.max) to the minimum value thereof (MFR.sub.min) satisfies the relationship0.1.ltoreq.Log (MFR.sub.max /MFR.sub.min).ltoreq.1 (1)and from 5 to 40% by weight of an ethylene-propylene copolymer component having an ethylene content of from 30 to 80% by weight, wherein the melt flow rates are measured according to ASTM D1238 at a temperature of 230.degree. C. and a load of 2.16 kg; and(b) from 12 to 17% by weight ethylene-(higher .alpha.-olefin) copolymer rubber having an ethylene content of 45% by weight or higher and containing polyethylene crystals having a value of long period as determined by Small angle X-ray scattering of from 6 to 14 nm, provided that the sum of (a) and (b) is 100% by weight.