Ziegler-natta-metallocene dual catalyst systems with activator-supports

An ethylene copolymer characterized by: a melt index of less than or equal to about 10 g / 10 min; a density in a range from about 0.90 g / cm3 to about 0.935 g / cm3; and a Mw / Mn ratio in a range from about 2.5 to about 8; and having the following polymer fractions in an ATREF test: from about 1 to about 18% by weight of the polymer eluted below a temperature of 40 ° C; from about 1 to about 15% by weight of the polymer eluted between 76 and 86 ° C; from about 27 to about 60% by weight of the polymer eluted above a temperature of 86 ° C; and the remaining percentage of the polymer eluted between 40 and 76 ° C.