Ethylene copolymer having enhanced film properties
AssigneeNOVA Chemicals (International) S.A.
InventorsPatrick Lam, Victoria Ker, Mark Kelly
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Abstract
The disclosure provides an ethylene copolymer having a density of from 0.912 g/cm3 to 0.925 g/cm3, a melt flow ratio (I21/I2) of from 20 to 30, and a normal comonomer distribution profile in a GPC-FTIR analysis, wherein the normal comonomer distribution profile has a slope of from −3.5 to −7.5, where the slope is defined as the number of short chain branches per 1000 carbons at a molecular weight of 300,000 minus the number of short chain branches per 1000 carbons at a molecular weight of 30,000. The ethylene copolymers have improved bulk density and when made into film, provide good physical properties.
Claims15
A blown film comprising an ethylene copolymer comprising ethylene and an alpha olefin having 3-8 carbon atoms, the ethylene copolymer having a density of from 0.912 g/cm3 to 0.925 g/cm3, a melt index (I2) of from 0.1 g/10 min to 5.0 g/10 min, a melt flow ratio (I21/I2) of from 20 to 30, and a normal comonomer distribution profile in a GPC-FTIR analysis, wherein the normal comonomer distribution profile has a slope of from −3.5 to −7.5, where the slope is defined as the number of short chain branches per 1000 carbons at a molecular weight of 300,000 minus the number of short chain branches per 1000 carbons at a molecular weight of 30,000.
Dependencies are inferred from the claim text.