COPOLYMERS AND FILMS THEREOF
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Nov 8, 2016
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Oct 14, 2008
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Copolymers of ethylene and α-olefins having C7-C12 carbon atoms having: (a) a density (D) in the range 0.900-0.940 g/cm3, (b) a melt index MI2 (2.16 kg, 190° C.) in the range of 0.01-50 g/10 min, (c) a melt elastic modulus G′ (G″=500 Pa) in the range 20 to 150 Pa, and (d) a tear strength (MD) of ≧220 g, a tear strength (TD) of ≧470 g, and a Dart Drop Impact (DDI) of ≧1800 g of a blown film having a thickness of 25 μm produced from the copolymer; where MD is referred to the machine direction and TD is the transverse direction of the blown film are suitably prepared in the gas phase by use of a supported metallocene catalyst system. Particularly suitable are copolymers of ethylene and 1-octene and the resultant blown films show improved processability and exhibit an improved balance of film properties of dart impact and tear strength.
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