Nova Chemicals (international) S.a.

Nova Chemicals Inc.

Lawrence Thomas Kale

Stephen John Brown

Christopher John Brooke Dobbin

Gilbert Alexander Arnould

Norman Dorien Joseph Aubee

Mark Edmund Weber

Sarah Marshall

James Arthur Auger

Clayton Trevor Elston

Peter Andrew Sipos

Patrick R Thomas

James Chin-Kuang Huang

Christopher John Dobbin

Norman Dorien Aubee

Novel polyethylene copolymer compositions prepared with a homogeneous catalyst system are characterized by having a unique high molecular weight, low comonomer (high density) fraction. These heterogeneous/homogeneous compositions may be prepared using a solution polymerization process in which the polymerization reactor contains a gradient in temperature, catalyst concentration or monomer concentration. The heterogeneous/homogeneous compositions of this invention are easily processed into films having excellent tear strengths and low hexane extractables.

Heterogeneous/homogeneous copolymer

Shrink films having an outstanding balance of physical properties and shrink properties are manufactured from &ldquo;pseudohomogeneous&rdquo; linear low density polyethylene resin. The preferred pseudohomogeneous resins used in the present invention are prepared with an advanced Ziegler Natta catalyst (having a magnesium component and a titanium component), preferably in medium pressure solution polymerization process. The films of this invention may be employed in a variety of uses, including, 1) &ldquo;overwrap&rdquo; packaging to protect goods during transportation, distribution, handling and display; and 2) food packaging, such as shrink wrap for frozen poultry, primal meat cuts and processed meat and cheese products.

Shrink films

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Cochrane, Canada

Lawrence Thomas Kale