Patent ID: 8299193

Claim:
A film including, in at least a part thereof, a layer comprising an ethylene-based resin (R) which is a copolymer of ethylene and an α-olefin of 4 to 10 carbon atoms and satisfies the following requirements (1) to (6) at the same time or an ethylene-based resin composition (R′) containing the resin (R); (1) the melt flow rate (MFR) at 190° C. under a load of 2.16 kg is in the range of 0.1 to 50 g/10 min, (2) the density (d) is in the range of 875 to 970 kg/m 3 , (3) the ratio [MT/η*(g/P)] of a melt tension [MT(g)] at 190° C. to a shear viscosity [η*(P)] at 200° C. and at an angular velocity of 1.0 rad/sec is in the range of 1.00×10 −4 to 9.00×10 −4 , (4) the sum [(M+E)(/1000C)] of the number of methyl branches [M(/1000C)] and the number of ethyl branches [E(/1000C)] as measured by 13C-NMR, each number being based on 1000 carbon atoms, is not more than 1.8, (5) the zero shear viscosity [η 0 (P)] at 200° C. and the weight-average molecular weight (Mw) as measured by a GPC-viscosity detector method (GPC-VISCO) satisfy the following relational formula (Eq-1): 0.01×10 −13 ×Mw 3.4 ≦η 0 ≦4.5×10 −13 ×Mw 3.4 (Eq-1), and (6) the intrinsic viscosity ([η](dl/g)) as measured in decalin at 135° C. and the weight-average molecular weight Mw as measured by the GPC-viscosity detector method (GPC-VISCO) of the ethylene-based resin (R) satisfy the following relational formula (Eq-7): 0.80×10 −4 ×Mw 0.776 ≦[η]≦1.65×10 −4 ×Mw 0.776 (Eq-7).