Ethylene copolymer composition

An ethylene copolymer composition comprising:

• (A2) an ethylene/α-olefin copolymer in an amount of 60 to 99% by weight, which is obtained by copolymerizating ethylene with an α-olefin of 3 to 20 carbon atoms, and which is characterized by
• (i) a density in the range of 0.850 to 0.980 g/cm3;
• (ii) a melt flow rate, MFR, at 190° C., under a load of 2.16 kg, in the range of 0.01 to 200 g/10 min;
• (iii) a melt tension, MT, in grams, at 190° C., which satisfies the following relation with MFR:
• MT>2.2×MFR−0.84;
• (iv) flow index, FI, in l/sec, defined by a shear rate which is given when a shear stress of molten copolymer at 190° C. reaches 2.4×106 dyne/cm2 which satisfies the following relation with MFR:
• FI<150×MFR;
• (v) molecular weight distribution, Mw/Mn, measured by GPC, in the range of 1.5 to 4;
• and
• (vi) relationship between the ratios MT/(Mw/Mn) and FI/MFR, satisfying the following inequality:
• MT/(Mw/Mn)>0.03×FI/MFR−3.0,
• with the proviso that when the value of 0.03×FI/MFR−3.0 is less than 0, it is taken as 0;
• and
• (B2) at least one crystalline polyolefin in an amount of 1 to 40% by weight, and which is selected from the group consisting of:
• (B-I) ethylene homopolymer or copolymer of ethylene with α-olefin of 3 to 20 carbon atoms having an MFR, at 190° C., under a load of 2.16 kg, of 0.01 to 100 g/10 min, and a density of more than 0.900 g/cm3, with the proviso that when (B-I) is an ethylene copolymer it differs from ethylene/α-olefin copolymer (A2),
• (B-II) propylene homopolymer or copolymer of propylene with at least one olefin selected from ethylene and α-olefin of 4 to 20 carbon atoms, having an MFR, at 230° C., under a load of 2.16 kg, of 0.1 to 100 g/10 min, and a density of more than 0.900 g/cm3, and
• (B-III) homopolymer of α-olefin of 4 to 20 carbon atoms or copolymer of α-olefins of 4 to 20 carbon atoms, having an MFR, at 230° C., under a load of 2.16 kg, of 0.1 to 100 g/10 min, and a density of more than 0.900 g/cm3.