US4569884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet material, process for its production and its use in the production of a composite structure
Assignee: Hexcel Corp
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Filing: 1982-09-17
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Granted: 1986-02-11
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Expires: 2002-09-17
Abstract
Abstract A sheet material useful for preparing high strength composite structures, especially in the field of light weight construction material, comprises a layer (A) of a high strength fibrous material impregnated and/or coated with a curable synthetic resin in the B-stage and a layer (B) of a polyamide polymer or another polymer having similar properties and being compatible with the curable synthetic resin of layer (A), which layer (B) is partially or completely bound to or embedded in layer (A).
Inventors
- 👤 Guy A. Weinand
- 👤 Jean-Pierre P. A. Botman
- 👤 Rainer Busch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:09
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B15/088; B32B15/20; B32B27/10; B32B27/34; B32B27/42; B32B3/00; B32B3/10; B32B3/12; B32B2250/00; B32B2250/40; B32B2255/00; B32B2255/26; B32B2260/00; B32B2260/02; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/02; B32B2262/10; B32B2262/101; B32B2317/00; B32B2317/12; B32B2317/125; B32B2605/00; B32B2605/18; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/3667; Y10T442/60; Y10T442/674
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A sheet material suitable for use with nonmetallic honeycomb core in the construction of honeycomb sandwich panels the sheet material consisting essentially of a layer (A) of a high strength fibrous material impregnated and/or coated with a B-stage phenolic resin, to which one side of the sheet material has been applied a layer (B) of a polyamide resin, said layer (B) of polyamide at least partially imbedded in the preimpregnated phenolic layer (A).
Claim 2
Dependent Claim
73 words
A sheet material suitable for use with nonmetallic honeycomb core in the construction of honeycomb sandwich panels the sheet material consisting essentially of a layer (A) of a high strength fibrous material impregnated and/or coated with a B-stage phenolic resin, to which one side of the sheet material has been applied a layer (B) of a polyamide resin, said layer (B) of polyamide at least partially imbedded in the preimpregnated phenolic layer (A).
Claim 3
Dependent Claim
43 words
The sheet material of claim 1 wherein the fibrous material of layer (A) is a woven web, random fiber mat, or a layer made of unidirectionally laid filaments, the fibrous material consisting of mineral fibers, fibers of synthetic organics resin and/or natural fibers.
Claim 4
Dependent Claim
12 words
The sheet material of claim 1 wherein the fibrous material is glass.
Claim 5
Dependent Claim
15 words
The sheet material of claim 3 wherein the phenolic resi is of the resol type.
Claim 6
Dependent Claim
13 words
The sheet material according to claim 3 wherein the polyamide is nylon 6.6.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |