Patent ID: 7205358

Claim:
An extruded ethylene copolymer obtained by a method comprising extruding an ethylene copolymer of ethylene and an α-olefin having 4 to 20 carbon atoms under conditions satisfying the following condition 4, and obtaining the extrudate, wherein an ethylene copolymer of ethylene and an α-olefin having 4 to 20 carbon atoms is an ethylene copolymer having a melt flow rate (MFR) and melt tension (MT) that satisfy the following conditions 1 to 3 when the ethylene copolymer is kneaded by using twin roll mill: (a) Condition 1 the melt flow rate (MFR, unit: g/10 min.) is from 0.01 to 200; (b) Condition 2 the melt flow rate (MFR) and melt tension (MT, unit: cN) at 190° C. satisfy the following (1): 2 ×MFR −0.59 <MT< 20 ×MFR −0.59 ; (c) Condition 3 the melt flow rate (MFR) and intrinsic viscosity ([η], unit: dl/g) satisfy the following (2): 1.02× MFR −0.094 <[η]<1.50× MFR −0.156 ; and (d) Condition 4 the melt flow rate (MFR) of the copolymer and specific energy for extruding ethylene copolymer(W, unit: kw·hr/kg) satisfy the following (3): W≧ 0.178 ×MFR −0.240 .