Polymerization processes using metallocene catalysts, their polymer products and end uses

A film comprising an ethylene alpha-olefin copolymer wherein the ethylene alpha-olefin copolymer has:

• a. a density D from 0.900 g/cc and 0.927 g/cc;
• b. a peak melting temperature Tmax second melt satisfying the following relation:
• Tmax second melt>D*398−245;
• c. a T75−T25 value of greater than 20, wherein T25 is the temperature at which 25 mass % of the eluted polymer is obtained and T75 is the temperature at which 75 mass % of the eluted polymer is obtained in a TREF experiment;
• and
• d. a M60/M90 value of greater than 1, wherein M60 is the molecular weight of the polymer fraction that elutes at 60° C. and M90 is the molecular weight of the polymer fraction that elutes at 90° C. in a TREF-LS experiment;
• and
• wherein the film has:
• a. an MD tear strength of 46.2 kN/m or greater;
• b. a dart impact strength of 192.5 kN/m or greater;
• and
• c. a heat seal initiation temperature of 85° C. or less.