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US3694524A
Expired / Lapsed
US
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Blends of low density polyethylene and butene/ethylene copolymers and high tear strength blown film made therefrom
Assignee: Mobil Oil AS
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Filing: 1971-05-07
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Granted: 1972-09-26
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Expires: 1991-05-07
Abstract
Abstract By incorporating low density polyethylene (e.g., above 5 to about 15 weight percent) into a butene-1/ethylene copolymer containing from about 0.25 to about 3 mole percent ethylene, a resin blend is provided that is extrudable at substantially high extrusion rates to a blown tubular film of substantially high tear strength.
Inventors
- 👤 Harold G Tinger
- 👤 Edward A Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:42
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
A blend, as defined in claim 1, wherein the concentration of the low density polyethylene is from about 6 to about 12, and the ethylene content of the copolymer is from about 0.8 to 1.2 mole percenT.
Claim 2
Dependent Claim
48 words
A blend, as defined in claim 1, wherein the low density polyethylene has a density of at least 0.92 but less than 0.93, the concentration of the low density polyethylene in the blend is about 10 weight percent, and the butene-1/ethylene copolymer contains about 1 mole percent ethylene.
Claim 3
Dependent Claim
12 words
A blown tubular film of the resin blend defined in claim 1.
Claim 4
Dependent Claim
10 words
Ablown tubular film of the resin blend of claim 2.
Claim 5
Dependent Claim
11 words
A blown tubular film of the resin blend of claim 3.
Claim 6
Dependent Claim
31 words
A PROCESS FOR PRODUCING FILM BY BLOWN TUBULAR FILM EXTRUSION AT A SUBSTANTIALLY HIGH TAKE-off rate which comprises subjecting to blown tubular film extrusion a resin blend as defined in claim
Claim 7
Dependent Claim
48 words
A process, as defined in claim 7, wherein the low density polyethylene has a density of at least 0.92 but less than 0.93, the concentration of the low density polyethylene in the blend is about 10 weight percent, and the butene-1/ethylene copolymer contains about one mole percent ethylene.
References Cited (Backward Citations)
CA775184A
Cited
US3050497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |