Patent US1677026A successfully refreshed from Google Patents.
US5635262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular weight high density polyethylene with improved tear resistance
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1994-12-12
•
Granted: 1997-06-03
•
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 00:09
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.
References Cited (Backward Citations)
GB829148A
Cited
US3919358A
Cited
GB2007685A
Cited
US4493923A
Cited
US5071686A
Cited
US4770912A
Cited
EP0310051A2
Cited
EP0339990A2
Cited
US4911985A
Cited
US5254617A
Cited
US5153039A
Cited
US5110685A
Cited
WO1991017900A2
Cited
WO1991019763A1
Cited
EP0517222A2
Cited
US5338589A
Cited
EP0545181A1
Cited
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 |