Nova Chemicals (International) S.a.

Nova Chemicals Inc.

Matthew Zaki Botros

Gilbert Alexander Arnould

Mark Rejman

Jason Michael Rycroft

XiaoChuan Wang

Tony Tikuisis

Yves Lacombe

Douglas Checknita

Mark Edmund Weber

Renee Laurel Anseeuw

Tobias Blain Hileman

Fraser D Cole Waldie

Chris Pajak

Michael Anthony Cappelli

William McGrory

Anna Rajkovic

Owen C Lightbody

Douglas Walter Checknita

Gilbert Arnould

Renée Laurel Anseeuw

A polymer suitable for use in a thin film hinge (living hinge) comprising from about 0.1 to about 5 weight % of a Ccomonomer and the balance ethylene, said composition having a density as determined according to ASTM D 792 from about 0.945 to about 0.965 g/cm; a melt index as determined according to ASTM D1238 (2.16 kg/190&#xb0; C.) from about 10 to about 20 g/10 min; a weight average molecular weight (Mw) from about 45,000 to about 55,000 g/mol; a polydispersity from about 2.5 to about 3.1 and when molded into a strip having a length of about 13 cm and gross thickness from about 50 to about 70 mil (about 1 to about 2 mm) and completely bent over end to end four times to create a thinned region or crease having a thickness from about 15 to about 30 mil (about 0.3 to about 0.7 mm) tested by bending and releasing the deformed thinned region of the strip through a radius of curvature from about 180 to about 190&#xb0; about a rounded plate goes through not less than 500 cycles without breaking.

Hinge polymer

Polyethylene living hinges used in 'snap top' lids for condiments and the like may be electron bean irradiated to partially crosslink the polyethylene to produce a hinge having an improvement in the number of opening and closing cycles until failure of not less than 30%. The irradiated lids may be used in place of polypropylene lids for condiment containers.

Radiation crosslinked polyethylene hinge

A dual reactor solution polymerization process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have high dimensional stability, excellent processability as well as good organoleptic properties and reasonable stress cracking resistance. The polyethylene compositions are suitable for compression molding or injection molding applications and are useful, for example, in the manufacture of caps and closures for bottles, and for example, in bottles containing non-pressurized liquids.

Polyethylene compositions having high dimensional stability and excellent processability for caps and closures

A plastic may be selected for a thin web application by finite element analysis of the part including the properties, including Poission's ratio of potential polymers from which the part may be made and subjecting the computer model of the part to loads to determine the deflection of the part under a specified series of loads or when the part breaks or subjecting the part to a number of use cycles to determine when the part fails. The process is iteratively repeated for each plastic and the results are compared to select a preferred plastic for the part.

Method of selecting a plastic

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Calgary, Canada

Matthew Zaki Botros