Patent US5635262A successfully refreshed from Google Patents.
US5635262A
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High molecular weight high density polyethylene with improved tear resistance
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1994-12-12
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Granted: 1997-06-03
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Expires: 2014-12-12
Abstract
Abstract Articles fabricated from certain high molecular weight high density polyethylenes (HMW-HDPE) combined with a second component, exhibit superior puncture propagation tear resistance and puncture propagation tear length. The second component may be an elastomer such as styrene-butadiene-styrene, styrene-isoprene-styrene, EPR, EPDM, butyl rubber, metallocene-catalyzed polyethylene, and combinations thereof. The second component or components will be present in a fabricated article from 1 to 15 weight percent. Articles include films, bags made from films, and extrusion blow-molded articles.
Inventors
- 👤 Steven A. Best
- 👤 Thomas S. Daniluk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:04
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08J2323/00; C08J2323/02; C08J2323/04; C08L23/08; C08L23/0807; C08L23/0815; C08L2314/00; C08L2314/02; C08L2314/06; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A high molecular weight-high density polyethylene composition comprising: a) a first component present in the range of from about 85 to 99 weight percent, said first component is an high molecular weight-high density polyethylene said high molecular weight-high density polyethylene having; i) a density in the range of from about 0.940 to about 0.970 g/cc; ii) an alpha-olefin comonomer content up to about 2 mole percent based on the total moles of the high molecular weight-high density polyethylene; iii) melt index in the range of from about 0.02 to about 0.1 dg/min.; and b) in the range of from 1 to about 15 weight percent of a metallocene-catalyzed linear low density polyethylene,; and wherein a film made from said composition has a puncture propagation tear, (machine direction) above about 2 KgF, and a puncture propagation tear length, (machine direction) up to about 100 mm.
Claim 2
Dependent Claim
144 words
A high molecular weight-high density polyethylene composition comprising: a) a first component present in the range of from about 85 to 99 weight percent, said first component is an high molecular weight-high density polyethylene said high molecular weight-high density polyethylene having; i) a density in the range of from about 0.940 to about 0.970 g/cc; ii) an alpha-olefin comonomer content up to about 2 mole percent based on the total moles of the high molecular weight-high density polyethylene; iii) melt index in the range of from about 0.02 to about 0.1 dg/min.; and b) in the range of from 1 to about 15 weight percent of a metallocene-catalyzed linear low density polyethylene,; and wherein a film made from said composition has a puncture propagation tear, (machine direction) above about 2 KgF, and a puncture propagation tear length, (machine direction) up to about 100 mm.
Claim 3
Dependent Claim
9 words
A film made from the composition of claim 1.
Claim 4
Dependent Claim
9 words
A bag made from the composition of claim 2.
Claim 5
Dependent Claim
10 words
A molded article made from the composition of claim 1.
Claim 6
Dependent Claim
12 words
The bag of claim 3, wherein said bag is a tee-shirt bag.
Claim 7
Dependent Claim
10 words
A can liner formed from the film of claim 2.
Claim 8
Dependent Claim
11 words
An extrusion blow-molded article made from the composition of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |