Patent ID: 6448356
Filing Date: 2002-09-10
Classification: C08F,C08J,Y10S

Abstract:
An ethylene-&agr;-olefin copolymer which is a copolymer of ethylene with a C3-20 &agr;-olefin, said copolymer satisfying the following conditions (a) to (e):(a) the density (D) is from 0.850 to 0.950 g/cm3, (b) the melt flow rate (MFR) value as measured at 190Â° C. under a load of 2.16 kg in accordance with ASTMD 1238 is in the range of from 0.1 to 50 g/10 min., (c) the relation between the melt tension (MT) and the melt flow rate (MFR) at 190Â° C. satisfies the following formula (1): log(MT)&gE;âˆ’0.91Ã—log(MFR)+0.06 â€ƒâ€ƒ(1), (d) the following three formulae (2), (3) and (4) are satisfied: Tmax&lE;972Dâˆ’816 â€ƒâ€ƒ(2) logW60&lE;âˆ’0.114 Tmax+9.48 â€ƒâ€ƒ(3) logW90&gE;0.0394 Tmaxâˆ’2.95 â€ƒâ€ƒ(4) where D is the density, Tmax is the elution peak temperature (Â°C.) by the cross fractionation measurement, W60 is the weight percent (wt %) of a soluble content at 60Â° C. or lower, and W90 is the weight percent (wt %) of a soluble content at 90Â° C. or higher, determined by crossfractionation using o-dichlorobenzene as solvent; and(e) the film haze (%)&lE;1.5Ã—104Ã—(D-0.9)2+3 â€ƒâ€ƒ(5).