US4770929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-weight composite material
Assignee: Toray Industries Inc
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Filing: 1987-09-02
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Granted: 1988-09-13
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Expires: 2007-09-02
Abstract
Abstract A light-weight composite material having a laminated structure comprises at least one porous fiber layer constructed of reinforcing short fibers which are distributed in random directions and combined with each other mainly at intersections thereof by carbonized binder and at least one fiber reinforced plastic layer comprising reinforcing fibers and a matrix resin. The composite material can have a low density, high mechanical properties of strength, modulus of elasticity and rigidity.
Inventors
- 👤 Hitoshi Nobumasa
- 👤 Kazuharu Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/28; B32B27/00; B32B27/12; B32B17/00; B32B27/18; B32B3/00; B32B3/26; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/50; B32B2307/514; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/378; Y10T442/3789; Y10T442/3813
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
53 words
A light-weight composite material having a laminated structure comprising: at least one porous fiber layer constructed of reinforcing short fibers which are distributed in random directions and combined with each other mainly at intersections thereof by carbonized binder; and at least one fiber reinforced plastic layer comprising reinforcing fibers and a matrix resin.
Claim 2
Dependent Claim
53 words
A light-weight composite material having a laminated structure comprising: at least one porous fiber layer constructed of reinforcing short fibers which are distributed in random directions and combined with each other mainly at intersections thereof by carbonized binder; and at least one fiber reinforced plastic layer comprising reinforcing fibers and a matrix resin.
Claim 3
Dependent Claim
15 words
The material of claim 1, wherein said reinforcing short fibers are distributed in two-dimensional directions.
Claim 4
Dependent Claim
15 words
The material of claim 1, wherein said reinforcing short fibers are distributed in three-dimensional directions.
Claim 5
Dependent Claim
34 words
The material of claim 1, wherein said reinforcing short fibers of said porous fiber layer are selected from the group consisting of carbon fibers, glass fibers, silicon carbide fibers, boron fibers and zirconia fibers.
Claim 6
Dependent Claim
19 words
The material of claim 1, wherein the porosity of said porous fiber layer is in the range of 50-90%.
Claim 7
Dependent Claim
27 words
The material of claim 1, wherein said carbonized binder is made from a resin selected from the group consisting of polyvinylalcohol resin, phenolic resin and furan resin.
Claim 8
Dependent Claim
25 words
The material of claim 1, wherein the content of said carbonized binder in said porous fiber layer is in the range of 10-50 wt. %.
Claim 9
Dependent Claim
25 words
The material of claim 7, wherein the content of said carbonized binder in said porous fiber layer is in the range of 20-40 wt. %.
Claim 10
Dependent Claim
36 words
The material of claim 1, wherein said reinforcing fibers of said fiber reinforced plastic layer are selected from the group consisting of carbon fibers, glass fibers, silicon carbide fibers, aramide fibers, boron fibers and zirconia fibers.
Claim 11
Dependent Claim
44 words
The material of claim 1, wherein said matrix resin of said fiber reinforced plastic layer is selected from the group consisting of epoxy resin, unsaturated polyester resin, phenolic resin, polyimide resin, polyamide resin, polyethylene resin, polypropylene resin, polystyrene resin, polyvinylchloride resin and acrylonitrile-butadiene-styrene resin.
Claim 12
Dependent Claim
18 words
The material of claim 1, wherein said matrix resin of said fiber reinforced plastic layer contains a modifier.
Claim 13
Dependent Claim
28 words
The material of claim 11, said modifier is selected from the group consisting of polyethylene glycol, polypropylene glycol, polysulfide, polyether sulfone, polypropylene sulfide and carboxy-terminated butadiene acrylonitrile rubber.
Claim 14
Dependent Claim
18 words
The material of claim 1, wherein said reinforcing fibers in said fiber reinforced plastic layer are unidirectionally orientated.
Claim 15
Dependent Claim
21 words
The material of claim 1, wherein said reinforcing fibers in said fiber reinforced plastic layer are formed as a woven fabric.
Claim 16
Dependent Claim
20 words
The material of claim 1, wherein said reinforcing fibers in said fiber reinforced plastic layer are formed as a mat.
Claim 17
Dependent Claim
31 words
The material of claim 1, wherein said material is constituted by a laminated structure of two layers consisting of a single porous fiber layer and a single fiber reinforced plastic layer.
Claim 18
Dependent Claim
31 words
The material of claim 1, wherein said material is constituted by a laminated structure consisting of more than two layers, both of the outermost layers being said fiber reinforced plastic layers.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |