| 摘要 |
PROBLEM TO BE SOLVED: To provide an ethylene copolymer that can give a film good in hot tack in a wide temperature range and a film. SOLUTION: This ethylene copolymer is obtained from ethylene and at least one selected from amongα-olefins having 3 to 20 carbon atoms, diene compounds, and cyclic olefins. (1) The ratio Mw/Mn of the weight-average molecular weight(Mw) to the number-average molecular weight measured by gel permeation chromatography is in the range of 1.5 to 4 and the weight- average molecular weight(Mw) is in the range of 3,000 to 1,000,000. (2) The resin density is in the range of 0.85 to 0.95g/cm<3> . (3) The relation between the crystallization start temperature (Tc, onset, deg.C) measured by a differential scanning calorimeter(DSC) and the melting point (Tm, deg.C) satisfies the formula: Tc, onset >=1.1×Tm-20.
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