US4680224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced plastic
Assignee: Phoenixx TPC Inc
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Filing: 1985-09-09
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Granted: 1987-07-14
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Expires: 2005-09-09
Abstract
Abstract A process for preparing shaped objects of continuous fiber strand material in a poly(arylene sulfide) matrix and the shaped objects prepared thereby. The shaped objects are prepared by a pultrusion process requiring adaptation of polymer slurry contacting with fiber strands and specifically adapted die apparatus suitable for use with viscous poly(arylene sulfide).
Inventors
- 👤 James E. O'Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:56
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/521; B29K; B29K2081/00; C08J2381/00; C08J2381/02; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249945; Y10T428/249946; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2971; Y10T428/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
A reinforced plastic comprising (a) a roving of reinforcing material having unidirectionally aligned fibers in (b) a poly(arylene sulfide) matrix.
Claim 2
Dependent Claim
20 words
A reinforced plastic comprising (a) a roving of reinforcing material having unidirectionally aligned fibers in (b) a poly(arylene sulfide) matrix.
Claim 3
Dependent Claim
35 words
A reinforced plastic as in claim 1 wherein (a) the roving comprises continuous filaments of fiber aligned by pultrusion; and (b) the poly(arylene sulfide) has a melt flow in the range of 1-20,000 grams/10 minutes.
Claim 4
Dependent Claim
24 words
A reinforced plastic as in claim 2 comprising 20 to about 50 weight percent poly(arylene sulfide) and 80 to about 50 weight percent fiber.
Claim 5
Dependent Claim
20 words
A reinforced plastic as in claim 3 wherein the poly(arylene sulfide) has a melting point of at least 300° F.
Claim 6
Dependent Claim
25 words
A reinforced plastic as in claim 4 wherein the poly(acrylene sulfide) has a melting point in the range of 400° F. to about 900° F.
Claim 7
Dependent Claim
15 words
A reinforced plastic as in claim 5 wherein the fibers comprise glass, carbon, or aramid.
Claim 8
Dependent Claim
20 words
A reinforced plastic as in claim 6 wherein the poly(arylene) sulfide has a flow rate greater than 100 g/10 min.
Claim 9
Dependent Claim
26 words
A reinforced plastic as in claim 1 wherein the poly(arylene) sulfide has a flow rate in the range of about 40 to about 1000 g/10 min.
Claim 10
Dependent Claim
26 words
A reinforced plastic as in claim 6 wherein the roving comprises continuous filaments and the reinforced plastic comprises 25 to 45 weight percent of polyphenylene sulfide.
Claim 11
Dependent Claim
32 words
A reinforced plastic as in claim 6 wherein 52-67 volume percent consists of fibers and about 36-50 volume percent consists of poly(phenylene sulfide), not including any void volume which may be present.
Claim 12
Dependent Claim
17 words
A reinforced plastic as in claim 6 further characterized as a thin, wide, fiber reinforced, "prepreg" sheet.
Claim 13
Dependent Claim
18 words
A reinforced plastic as in claim 11 further characterized by a plurality of the prepreg sheets laminated together.
Claim 14
Dependent Claim
16 words
A reinforced plastic as in claim 3 in the form of a tape, rod or sheet.
Claim 15
Dependent Claim
16 words
A reinforced plastic as in claim 2 in the form of a tape, rod, or sheet.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |