US4824912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terblends and films of LLDPE, LMW-HDPE and HMW-HDPE
Assignee: Mobil Oil AS
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Filing: 1987-08-31
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Granted: 1989-04-25
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Expires: 2007-08-31
Abstract
Abstract Terblends of a major proportion of LLDPE (linear low density polyethylene) and minor amounts of LMW-HDPE (high density polyethylene of low molecular weight) and of HMW-HDPE (high density polyethylene of high molecular weight) give blends which are processable at higher rates, give lower extruder back-pressure and result in films generally superior to those made from LLDPE alone.
Inventors
- 👤 Tien-Kuei Su
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:38
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L2205/00; C08L2205/02; C08L2205/03; C08L23/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
55 words
A composition comprising a blend of a major proportion of LLDPE (linear low density polyethylene) and a minor proportion of each of two HDPE (high density polyethylene) resins one of which is LMW-HDPE having a MI (melt index) of greater than 10 and the other being HMW-HDPE having a melt index of less than 1.
Claim 2
Dependent Claim
55 words
A composition comprising a blend of a major proportion of LLDPE (linear low density polyethylene) and a minor proportion of each of two HDPE (high density polyethylene) resins one of which is LMW-HDPE having a MI (melt index) of greater than 10 and the other being HMW-HDPE having a melt index of less than 1.
Claim 3
Dependent Claim
21 words
The composition of claim 1 which the LLDPE comprises 50-98 weight LLDPE, 1-25 weight percent LMW-HDPE and 1-25 weight percent HMW-HDPE.
Claim 4
Dependent Claim
20 words
The composition of claim 1 which comprises 70-95 weight percent LLDPE, 5-20 weight percent LMW-HDPE and 1-10 weight percent HMW-HDPE.
Claim 5
Dependent Claim
54 words
The composition of claim 1 in which said LLDPE has a density of less than 0.93 and a MI of 2 or less; said LMW-HDPE has a density greater than 0.94 and a MI of at least 25; and said HMW-HDPE has a density greater than 0.94 and a MI of less than 0.5.
Claim 6
Dependent Claim
54 words
The composition of claim 2 in which said LLDPE has a density of less than 0.93 and a MI of 2 or less; said LMW-HDPE has a density greater than 0.94 and a MI of at least 25; and said HMW-HDPE has a density greater than 0.94 and a MI of less than 0.5.
Claim 7
Dependent Claim
54 words
The composition of claim 3 in which said LLDPE has a density of less than 0.93 and a MI of 2 or less; said LMW-HDPE has a density greater than 0.94 and a MI of at least 25; and said HMW-HDPE has a density greater than 0.94 and a MI of less than 0.5.
Claim 8
Dependent Claim
16 words
The composition of claim 1 in which said LLDPE is a copolymer of ethylene and hexene.
Claim 9
Dependent Claim
16 words
The composition of claim 2 in which said LLDPE is a copolymer of ethylene and hexene.
Claim 10
Dependent Claim
16 words
The composition of claim 3 in which said LLDPE is a copolymer of ethylene and hexene.
Claim 11
Dependent Claim
16 words
The composition of claim 4 in which said LLDPE is a copolymer of ethylene and hexene.
Claim 12
Dependent Claim
11 words
The composition of claim 1 in the form of a film.
Claim 13
Dependent Claim
11 words
The composition of claim 2 in the form of a film.
Claim 14
Dependent Claim
11 words
The composition of claim 3 in the form of a film.
Claim 15
Dependent Claim
11 words
The composition of claim 4 in the form of a film.
Claim 16
Dependent Claim
11 words
The composition of claim 5 in the form of a film.
Claim 17
Dependent Claim
11 words
The composition of claim 6 in the form of a film.
Claim 18
Dependent Claim
11 words
The composition of claim 7 in the form of a film.
Claim 19
Dependent Claim
11 words
The composition of claim 8 in the form of a film.
Claim 20
Dependent Claim
11 words
The composition of claim 9 in the form of a film.
Claim 21
Dependent Claim
11 words
The composition of claim 10 in the form of a film.
References Cited (Backward Citations)
US3381060A
Cited
US4429079A
Cited
US4339507A
Cited
US4438238A
Cited
FR2526803A1
Cited
US4705829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |