US4127624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing novel polymeric fibers and fiber masses
Assignee: Raytheon Co
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Filing: 1977-05-02
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Granted: 1978-11-28
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Expires: 1997-05-02
Abstract
Abstract We have prepared a new class of polymeric fibers and masses which are produced by precipitation from solutions of the polymer. The fibers and fiber masses have novel and useful characteristics. A fiber mass of this invention is a coherent, three-dimensional network of interconnected crystalline polymeric fibers and fiber bundles randomly arrayed in all directions. The fibers are smaller in diameter than can be consistently produced by conventional fiber drawing and spinning techniques. The novel fiber masses are produced from solutions of fiber-forming linear organic polymers having regularly repeated chain structures. The polymers are precipitated from these solutions by simultaneously cooling and agitating the polymer solution at vibrations in the sonic frequency range. The fiber masses may then be removed from the solvent or, in the case of a polymerizable solvent, a composite may be formed.
Inventors
- 👤 Leon B. Keller
- 👤 Robert K. Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:19
CPC Classifications
D; D04; D04H; D04H13/00; B; B29; B29C; B29C67/00; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/24; B29C70/28; B29C70/30; B29C70/36; D01; D01D; D01D5/00; D01D5/40; B29C2791/00; B29C2791/004; B29C2791/008; B29K; B29K2105/00; B29K2105/0002; B29K2223/00; B29K2223/04; B29K2223/06; B29K2223/10; B29K2223/12; B29K2301/00; B29K2301/12; B29K2995/00; B29K2995/0037; B29K2995/0041; B29K2995/0045
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
56 words
A process for the production of a three-dimensional polymeric fiber mass formed of crystalline, branched polymeric fibers and fiber bundles randomly arranged in all directions to define a coherent mass having isotropic properties comprising dissolving a fiber-forming polymeric material in a solvent, and cooling resultant solution while subjecting said solution to the application of sonic vibrations.
Claim 2
Dependent Claim
56 words
A process for the production of a three-dimensional polymeric fiber mass formed of crystalline, branched polymeric fibers and fiber bundles randomly arranged in all directions to define a coherent mass having isotropic properties comprising dissolving a fiber-forming polymeric material in a solvent, and cooling resultant solution while subjecting said solution to the application of sonic vibrations.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said solvent is a nonpolymerizable solvent.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said solvent is a polymerizable solvent.
Claim 5
Dependent Claim
18 words
The process of claim 3 wherein said solvent is styrene and said fiber forming material is isotactic polypropylene.
Claim 6
Dependent Claim
23 words
The process of claim 3 wherein said solvent is a mixture of styrene and methylmethacrylate and said fiber forming material is isotactic polypropylene.
Claim 7
Dependent Claim
24 words
The process of claim 3 wherein said solvent is a mixture of styrene, methylmethacrylate and acrylonitrile and said fiber forming material is isotactic polypropylene.
Claim 8
Dependent Claim
17 words
The process of claim 3 wherein the resultant solution contains a crosslinking agent for the polymerizable solvent.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein the fiber-forming polymeric material is a polyalkene.
Claim 10
Independent Claim
70 words
A method for the production of a composite material comprising: (a) dissolving a fiber-forming material in a polymerizable solvent, (b) subjecting the resultant solution to the application of sonic vibrations, and cooling said agitated solution whereby a three-dimensional fibrous mass consisting essentially of crystalline, branched fibers and fiber bundles randomly arranged in all directions to define a coherent mass having isotropic properties is formed, and (c) curing said fiber-containing solvent.
Claim 11
Independent Claim
70 words
A method for the production of a composite material comprising: (a) dissolving a fiber-forming material in a polymerizable solvent, (b) subjecting the resultant solution to the application of sonic vibrations, and cooling said agitated solution whereby a three-dimensional fibrous mass consisting essentially of crystalline, branched fibers and fiber bundles randomly arranged in all directions to define a coherent mass having isotropic properties is formed, and (c) curing said fiber-containing solvent.
Claim 12
Dependent Claim
23 words
The method of claim 9 wherein said fiber-forming material is polyethylene, isotactic polypropylene, polyethylene oxide, isotactic poly-4-methylpentene-1, isotactic poly(butene-1), nylon or mixtures thereof.
Claim 13
Dependent Claim
12 words
The method of claim 9 wherein said fiber-forming material is a polyalkene.
Claim 14
Dependent Claim
18 words
The process of claim 1 wherein the sonic vibrations have frequencies ranging from about 80 to 2000 Hz.
Claim 15
Independent Claim
76 words
A method for the production of a composite material comprising: (a) impregnation of a fiber mass consisting essentially of crystalline, branched polymeric fibers and fiber bundles, said fibers and fiber bundles being branched and being structurally integral each with the other at their points of branching so that the fibers and fiber bundles are randomly arranged in all directions to define a coherent mass having isotropic properties with a polymerizable liquid, and (b) curing said liquid.
Claim 16
Independent Claim
76 words
A method for the production of a composite material comprising: (a) impregnation of a fiber mass consisting essentially of crystalline, branched polymeric fibers and fiber bundles, said fibers and fiber bundles being branched and being structurally integral each with the other at their points of branching so that the fibers and fiber bundles are randomly arranged in all directions to define a coherent mass having isotropic properties with a polymerizable liquid, and (b) curing said liquid.
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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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |