US4842934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber for reinforcing plastic composites and reinforced plastic composites therefrom
Assignee: Honeywell International Inc
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Filing: 1987-10-30
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Granted: 1989-06-27
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Expires: 2007-10-30
Abstract
Abstract A high tenacity fiber for reinforcing plastic composites, the fiber being selected from the group consisting of polyester, aliphatic polyamide, and combinations thereof. The fiber is treated with a composition consisting essentially of an organofunctional silane in an amount sufficient to achieve 0.02 to 1.0 weight percent of the silane on the fiber, and a diluent which provides for the hydrolysis of the silane to a silanol. The fiber is used to reinforce a plastic composite additionally comprising a resin matrix.
Inventors
- 👤 David S. Cordova
- 👤 David R. Coffin
- 👤 Stanley D. Lazarus
- 👤 Hugh H. Rowan
- 👤 Robert M. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:05
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2962; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A high tenacity reinforcing polyester fiber for incorporation with a thermosetting resin which is then cured to form a plastic composite, said polyester fiber characterized in that the fiber is treated to enhance wettability with the resin and adhesion with the cured resin, and the fiber has a thermal shrinkage of 3 percent or less, a modulus after cure of at least 70 grams per denier and a tenacity of at least 5.5 grams per denier.
Claim 2
Dependent Claim
76 words
A high tenacity reinforcing polyester fiber for incorporation with a thermosetting resin which is then cured to form a plastic composite, said polyester fiber characterized in that the fiber is treated to enhance wettability with the resin and adhesion with the cured resin, and the fiber has a thermal shrinkage of 3 percent or less, a modulus after cure of at least 70 grams per denier and a tenacity of at least 5.5 grams per denier.
Claim 3
Dependent Claim
38 words
The fiber of claim 1 having an elongation of from about 10 to 28 percent and wherein the modulus after cure is 70 to 90 grams per denier and the tenacity is 7 to 9 grams per denier.
Claim 4
Dependent Claim
9 words
The fiber of claim 1 which is polyethylene terephthalate.
Claim 5
Dependent Claim
80 words
A fiber reinforced plastic composite comprising a cured resin matrix reinforced with fiber, said fiber comprising a high tenacity reinforcing polyester fiber that is treated to enhance adhesion with the cured resin, has a thermal shrinkage of 3 percent or less, a modulus after cure of at least 70 grams per denier and a tenacity of at least 5.5 grams per denier, said polyester fiber being present in an amount sufficient to provide improved notched impact strength to the composite.
Claim 6
Dependent Claim
80 words
A fiber reinforced plastic composite comprising a cured resin matrix reinforced with fiber, said fiber comprising a high tenacity reinforcing polyester fiber that is treated to enhance adhesion with the cured resin, has a thermal shrinkage of 3 percent or less, a modulus after cure of at least 70 grams per denier and a tenacity of at least 5.5 grams per denier, said polyester fiber being present in an amount sufficient to provide improved notched impact strength to the composite.
Claim 7
Dependent Claim
27 words
The composite of claim 4 wherein said cured resin matrix is formed from a thermosetting resin selected from the group consisting of polyester, epoxy, and vinyl ester.
Claim 8
Dependent Claim
39 words
The composite of claim 5 wherein the fiber has an elongation of from about 10 to 28 percent, a modulus after cure of 70 to 90 grams per denier and a tenacity of 7 to 9 grams per denier.
Claim 9
Dependent Claim
12 words
The composite of claim 6 wherein said polyester fiber is polyethylene terephthalate.
Claim 10
Dependent Claim
25 words
The composite of claim 4 wherein the elongation of the fiber in the cured composite is at least 2 times that of the resin matrix.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |