Politilenos linear low density high melt strength and high ratio of melt index.

摘要

A substantially unblended polyethylene having less than 10 percent by weight of a separate branched polymer comprising mixing said polyethylene substantially an ethylene alpha-olefin copolymer: wherein said copolymer has a density in the range 0.915 to 0.950 of g / cm 3; wherein said copolymer has an average molecular weight (Mw) in the range of 60,000 to 200,000, a ratio of melt index I21 / I2 (MIR), as determined by ASTM D-1238, in the range of 50-80 a MI in the range of 0.1 to 10 g / 10 min; wherein said copolymer has a melt strength (MS) in the range 7-20 cN of; wherein said copolymer has a CDBI greater than 60%; and wherein said copolymer has a Mw / Mn less than or equal to 4.5.