ETHYLENE/ alpha -OLEFIN COPOLYMER, COMPOSITION THEREOF, FILM THEREOF, AND USES OF THESE

摘要

An ethylene/ alpha -olefin copolymer; a composition thereof; films of these; a resin material containing polar groups; products made using the ethylene/ alpha -olefin copolymer; and uses of the copolymer. The ethylene/ alpha -olefin copolymer is characterized by (A) having a density of 0.92 to 0.96 g/cm<3>, (B) having a melt flow rate of 0.01 to 200 g/10 min, (C) having a molecular weight distribution of 1.5 to 5.0, (D) when analyzed by the continuously temperature-rising elution fractionation method, giving an elution temperature-elution amount curve which has one peak and in which the difference in temperature (T75-T25), wherein T25 is the temperature at which the elution amount as calculated from the integral elution curve obtained from the elution temperature-elution amount curve reaches 25 % of the whole polymer and T75 is the temperature at which the elution amount reaches 75 % thereof, has a specific relationship with the density d, and (E) having one or two melting points wherein the higher melting point Tm1 and the density d satisfy a specific relationship. The ethylene/ alpha -olefin copolymer is excellent in heat resistance, heat-sealing strength, and moldability.