US4584347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyolefin fiber
Assignee: Honeywell International Inc
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Filing: 1984-04-06
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Granted: 1986-04-22
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Expires: 2004-04-06
Abstract
Abstract Fibers prepared by spinning, drawing and drying dilute solutions of ultrahigh molecular weight polyethylene or polypropylene are modified by including in the dilute solution a polymeric additive. The polyethylene fibers so prepared have melting points above 140 DEG C. and exhibit improved adherence to matrices, resistance to fibrillation and other advantageous properties. Additives include lower molecular weight polyolefins, oxidized polyolefins, olefin copolymers, polyolefin graft copolymers and polyoxymethylenes.
Inventors
- 👤 Gary A. Harpell
- 👤 Sheldon Kavesh
- 👤 Igor Palley
- 👤 Dusan C. Prevorsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:17
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/44; D01F6/46; D01F6/02; D01F6/04; B; B29; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2223/00; B29K2223/04; B29K2223/06; B29K2423/00; B29K2423/04; B29K2423/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A stretched fiber having tenacity at least 15 g/denier, tensile modulus at least 500 g/denier and main melting temperature at least 140° C., comprising polyethylene of molecular weight at least about 500,000 and a polymeric additive selected from the group consisting of copolymers containing monoolefins as primary monomers, polyolefins of molecular weight not greater than 250,000, oxidized polyolefins and polyoxymethylenes, with the weight of polymeric additive being at least 2% of the weight of the polyethylene.
Claim 2
Dependent Claim
76 words
A stretched fiber having tenacity at least 15 g/denier, tensile modulus at least 500 g/denier and main melting temperature at least 140° C., comprising polyethylene of molecular weight at least about 500,000 and a polymeric additive selected from the group consisting of copolymers containing monoolefins as primary monomers, polyolefins of molecular weight not greater than 250,000, oxidized polyolefins and polyoxymethylenes, with the weight of polymeric additive being at least 2% of the weight of the polyethylene.
Claim 3
Dependent Claim
18 words
The stretched fiber of claim 1 wherein said polyethylene is of weight average molecular weight at least 1,000,000.
Claim 4
Dependent Claim
14 words
The stretched fiber of claim 1 wherein said polymeric additive is an ethylene copolymer.
Claim 5
Dependent Claim
30 words
The stretched fiber of claim 3 wherein said ethylene copolymer contains at least one comonomer selected from the group consisting of acrylic acid, methacrylic acid, vinyl acetate and vinyl alcohol.
Claim 6
Dependent Claim
21 words
The stretched fiber of claim 3 wherein said ethylene copolymer is an ethylene-acrylic acid copolymer with 1-15 mole percent acrylic acid.
Claim 7
Dependent Claim
14 words
The stretched fiber of claim 3 wherein said ethylene copolymer is an ethylene-propylene copolymer.
Claim 8
Dependent Claim
14 words
The stretched fiber of claim 3 wherein said ethylene copolymer is an ethylene-propylene-diene terpolymer.
Claim 9
Dependent Claim
20 words
The stretched fiber of claim 1 wherein said polymeric additive is a polyolefin of molecular weight not greater than 250,000.
Claim 10
Dependent Claim
14 words
The stretched fiber of claim 8 wherein said polymeric additive is low density polyethylene.
Claim 11
Dependent Claim
15 words
A composite comprising a network of the stretched fiber of claim 9 and a matrix.
Claim 12
Dependent Claim
12 words
The composite of claim 10 wherein said matrix is a polymeric matrix.
Claim 13
Dependent Claim
13 words
The composite of claim 11 wherein said polymeric matrix is a thermoplastic matrix.
Claim 14
Dependent Claim
13 words
The composite of claim 11 wherein said polymeric matarix is a thermosetting matrix.
Claim 15
Dependent Claim
13 words
The composite of claim 11 wherein said polymeric matrix is an elastomeric matrix.
Claim 16
Dependent Claim
17 words
The stretched fiber of claim 1 wherein the polyolefin is of molecular weight not greater than 100,000.
References Cited (Backward Citations)
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |