Patent ID: 6346576
Filing Date: 2002-02-12
Classification: C08J,C08L

Abstract:
An ethylene resin packaging film comprising an ethylene/&agr;-olefin copolymer (A) which is a copolymer obtained by copolymerizing ethylene and an &agr;-olefin of 6 to 20 carbon atoms in the presence of an olefin polymerization catalyst comprising (a) a compound of a transition metal of Group IV of the periodic table, said compound (a) containing a ligand having cyclopentadienyl skeleton, and (b) an organoaluminum oxy-compound, and which has the following properties:(i) the density is in the range of 0.918 to 0.935 g/cm3, (ii) the melt flow rate (MFR (g/10 min)) at 190Â° C. under a load of 2.16 kg is in the range of 0.05 to 2.0 g/10 min, (iii) the decane-soluble component fraction (W (% by weight) at room temperature and the density (d (g/cm3)) satisfy the following relation W<80Ã—exp(âˆ’100(dâˆ’0.88))+0.1, (iv) the flow index (FI (l/sec)), which is defined as a shear rate at which the shear stress of said copolymer in a molten state at 190Â° C. reaches 2.4Ã—106 dyne/cm2, and the melt flow rate (MFR (g/10 min)) satisfy the following relation FI>75Ã—MFR, and (v) the melt tension (MT (g)) at 190Â° C. and the melt flow rate (MFR (g/10 min)) satisfy the following relation MT>2.2Ã—MFRâˆ’0.84.