ETHYLENE-ALPHA-OLEFIN COPOLYMER AND POLYETHYLENE COMPOSITION

摘要

An ethylene- alpha -olefin copolymer obtainable by a gas phase polymerization method in the presence of a catalyst, wherein the copolymer satisfies the following conditions (A-1) to (A-4): (A-1) Melt flow rate (MFR): 0.3 to 5.0 g/10 minutes (A-2) Melt flow rate ratio (MFRR): 20 or more (A-3) Density (d): 0.910 to 0.930 g/cm<3> (A-4) Cold xylene-soluble portion (CXS)(wt%) is in the range defined by the formula (1): 1.5x10<-4>xd<-125>xMFR<0.5>+0.3>/=CXS