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Title:
POLYETHYLENE COMPOSITION AND FILM
Document Type and Number:
WIPO Patent Application WO/2020/012314
Kind Code:
A3
Abstract:
A polyethylene composition comprises a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of < 2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution Mw/Mn of < 2.3, a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution Mw/Mn of < 2.3, and a fourth polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 100,000 to 250,000 and a molecular weight distribution Mw/Mn of > 2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition may have a soluble fraction in a CEF analysis of at least 7.5 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of ≥ 200 MPa (at a film thickness of about 1 mil) and an oxygen transmission rate (OTR) of ≥ 550 cm3 per 100 inch2 (at a film thickness of about 1 mil). Film made from the polyethylene composition retains much of its dart impact performance on downgauging from a thickness of 1 mil to a thickness of 0.75 mil.

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Inventors:
WANG XIAOCHUAN (CA)
ZORICAK PETER (CA)
MOLLOY BRIAN (CA)
WANG QINYAN (CA)
VANASSELDONK LAWRENCE (CA)
AUBEE NORMAN (CA)
Application Number:
PCT/IB2019/055771
Publication Date:
April 09, 2020
Filing Date:
July 06, 2019
Export Citation:
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Assignee:
NOVA CHEM INT SA (CH)
International Classes:
C08F210/16; C08J5/18; C08L23/08
Domestic Patent References:
WO2008077530A22008-07-03
WO2019133394A12019-07-04
WO2019132694A12019-07-04
WO2019126845A12019-07-04
WO2003074594A12003-09-12
WO2017106120A22017-06-22
WO1998020062A11998-05-14
WO1994026816A11994-11-24
WO2014099307A12014-06-26
Foreign References:
US9963529B12018-05-08
US20080038533A12008-02-14
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