US3862287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fibre reinforced thermoplastic materials
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1972-05-26
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Granted: 1975-01-21
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Expires: 1992-05-26
Abstract
Abstract Extruding a plurality of fibres, passing the fibres into a bed of a powdered thermoplastic, causing the fibres to converge while they are in the bed so that they form an impregnated bundle, and heating the bundle to a temperature above the melting point of the thermoplastic so that the thermoplastic flows to produce a matrix around the fibres. The bed of powdered thermoplastic is preferably fluidised.
Inventors
- 👤 John Howard Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:45
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/521; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29K; B29K2101/00; B29K2101/12; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2105/25; B29K2105/251; Y; Y10; Y10S; Y10S264/00; Y10S264/51
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A PROCESS FOR THE PRODUCTION OF FIBRE REINFSORCED THERMOPLASTIC MATERIAL COMPRISISNG EXTRUDING A PLURALITY OF FIBRES, PASSING THE FIBRES INTO A FLUIDIZED BED OF POWDER THERMOPLASTIC MATERIAL OF LOWER MELTING POINT THAN THE FIBROUS MATERIAL CONVERGING THE FIBRES SUCH THAT THE FIBRES ARE COMPLETELY DRAWN TOGETHER TO LODGE THE POWDERED MATERIAL BETEEEN THE FIBRES WHILE THEY ARE IN THE BED SO THAT THEY FORM A BUNDLE WHICH IS IMPREGNATED WITH THE THERMOPLASTIC POWDER, AND HEATING THE IMPREGNATED BUNDLE TO A TEMPERATURE ABOVE THE MELTING POINT OF THE THERMOPLASTIC BUT BELOW THE MELTING POINT OF THE FIBRES.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE PRODUCTION OF FIBRE REINFSORCED THERMOPLASTIC MATERIAL COMPRISISNG EXTRUDING A PLURALITY OF FIBRES, PASSING THE FIBRES INTO A FLUIDIZED BED OF POWDER THERMOPLASTIC MATERIAL OF LOWER MELTING POINT THAN THE FIBROUS MATERIAL CONVERGING THE FIBRES SUCH THAT THE FIBRES ARE COMPLETELY DRAWN TOGETHER TO LODGE THE POWDERED MATERIAL BETEEEN THE FIBRES WHILE THEY ARE IN THE BED SO THAT THEY FORM A BUNDLE WHICH IS IMPREGNATED WITH THE THERMOPLASTIC POWDER, AND HEATING THE IMPREGNATED BUNDLE TO A TEMPERATURE ABOVE THE MELTING POINT OF THE THERMOPLASTIC BUT BELOW THE MELTING POINT OF THE FIBRES.
Claim 3
Dependent Claim
37 words
A process according to claim 1, in which the fibres are extruded through a spinneret and the fibres begin to converge immediately on leaving the spinneret and they pass into the bed before the convergence is complete.
Claim 4
Dependent Claim
18 words
A process according to claim 1, in which the fibres enter the bed while they are still hot.
Claim 5
Dependent Claim
37 words
A process according to claim 1 in which the impregnated bundle, while at a temperature above the melting point of the thermoplastic material, is passed through a die so that the bundle is consolidated into a lace.
Claim 6
Dependent Claim
13 words
A process according to claim 1, in which the fibres are glass fibres.
Claim 7
Dependent Claim
41 words
A process according to claim 5, in which the bed is fluidised by means of a non-reactive gas and the glass fibre is extruded directly into the non-reactive gas to that the fibres enter the bed before they contact the air.
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US3220905A
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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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |