| 摘要 |
PROBLEM TO BE SOLVED: To obtain an ethylene-α-olefin copolymer composition that has excellent flexibility and drawing processability, an expanded drawable temperature range and is useful as a packaging film for goods and articles by using specific ethylene-α-olefin copolymers having different densities. SOLUTION: The objective composition comprises (A) 40-85 wt.% of an ethylene-α-olefin copolymer that includes theα-olefins of 3-12 carbon atoms, has a MFR of 0.1-50 g/10 min, a density (d) of 0.880-0.915 g/cm3; (B) 60-15 wt.% of an ethylene-α-olefin copolymer that includes theα-olefin of 3-12 carbon atoms, has a MFR of 0.1-50 g/10 min, a density (d) of 0.915-0.940 where the amorphous fraction is >=65% at 80 deg.C and <=95% at 100 deg.C according to the formula [Fa(T) is the amorphous fraction at T deg.C; Fa(20) means the amorphous fraction at 20 deg.C represented by 1-ΔHs/ΔHu];ΔHs is the heat of fusion of the sample;ΔHu is the heat of crystal fusion at equilibrium (292.9 J/g);ΔHTi is the accumulated heat of fusion at Ti deg.C]. |
