US6277771B1
Expired / Lapsed
US
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Reinforcing carbon fiber material, laminate and detecting method
Assignee: Toray Industries Inc
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Filing: 1999-02-15
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Granted: 2001-08-21
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Expires: 2019-02-15
Abstract
Abstract A sheet-shaped carbon fiber base material is made up from reinforcing carbon fiber and metal wire integrally formed into a carbon fiber base material which may be a a woven fabric, a tow sheet and a prepreg. The volume fraction of metal in the sheet-shaped reinforcing carbon fiber base material is no more than 4% of the carbon fiber. A laminate may also be formed from the sheet-shaped carbon fiber material, where the reinforcing carbon fiber and the metal wire are laid-up in such a way that the metal wire insertion positions are mutually different. Also disclosed is a method of detecting the number of plies in a laminate that includes non-destructively sensing with a detector the presence of metal wire in a laminate of plies of a sheet-shaped carbon fiber base material made up of reinforcing carbon fiber and metal wire integrally formed to make the sheet-shaped carbon fiber laminate material and determining the number of the plies in the laminate based on the metal wires detected.
Inventors
- 👤 Akira Nishimura
- 👤 Takashi Kobayashi
- 👤 Ikuo Horibe
- 👤 Kiyoshi Homma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:01
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C70/88; B29C70/882; B29C70/885; B32; B32B; B32B5/00; D; D03; D03D; D03D15/00; D03D15/20; D03D15/242; D03D15/267; D03D15/275; D03D15/40; D03D15/44; D03D15/46; D03D15/50; D03D15/573; D03D15/60; D03D15/67; D03D9/00; B29K; B29K2305/00; B29K2305/02; B29K2305/08; B29K2305/10; B29K2305/12; B29K2305/14; B29K2901/00; B29K2901/10; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06; D10B2101/10; D10B2101/12; D10B2101/20; D10B2321/00; D10B2321/02; D10B2321/022; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/04; D10B2401/00; D10B2401/06; D10B2401/062; D10B2401/063; D10B2401/16; D10B2505/00; D10B2505/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2915; Y10T428/2933; Y10T428/294; Y10T428/30; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/339; Y10T442/3472; Y10T442/3602; Y10T442/361
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
60 words
A sheet-shaped carbon fiber base material, comprising reinforcing carbon fiber and metal wire integrally formed into a carbon fiber base material selected from the group consisting of a woven fabric, a tow sheet and a prepreg, the volume fraction of metal in said sheet-shaped reinforcing carbon fiber base material being no more than 4% in terms of the carbon fiber.
Claim 2
Dependent Claim
60 words
A sheet-shaped carbon fiber base material, comprising reinforcing carbon fiber and metal wire integrally formed into a carbon fiber base material selected from the group consisting of a woven fabric, a tow sheet and a prepreg, the volume fraction of metal in said sheet-shaped reinforcing carbon fiber base material being no more than 4% in terms of the carbon fiber.
Claim 3
Dependent Claim
28 words
The carbon fiber base material according to claim 1 where the metal wire is metal wire which has been covered around its outside with an insulating covering material.
Claim 4
Dependent Claim
28 words
The carbon fiber base material according to claim 1 where the metal wire is arranged in the same direction as the direction of orientation of the carbon fiber.
Claim 5
Dependent Claim
29 words
The carbon fiber base material according to claim 1 where the metal wire is arranged at an angle in terms of the direction of orientation of the carbon fiber.
Claim 6
Dependent Claim
18 words
The carbon fiber base material according to claim 1 where the insulating covering material is a fibrous material.
Claim 7
Dependent Claim
27 words
The carbon fiber base material according to claim 5 where the covering ratio of the metal wire covered by the insulating covering material is at least 90%.
Claim 8
Dependent Claim
20 words
The carbon fiber base material according to claim 1 where the sheet-shaped carbon fiber base material is a woven fabric.
Claim 9
Dependent Claim
38 words
The carbon fiber base material according to claim 1 where the sheet-shaped carbon fiber base material is a tow sheet formed by sticking to a support carbon fiber unidirectionally arranged in parallel, by means of an adhesive agent.
Claim 10
Dependent Claim
28 words
The carbon fiber base material according to claim 1 where the sheet-shaped carbon fiber base material is a prepreg integrally formed from carbon fiber and B-stage thermosetting resin.
Claim 11
Dependent Claim
42 words
The carbon fiber base material according to claim 7 where the sheet-shaped carbon fiber base material is a woven fabric produced by interweaving metal wire in the weft arrangement direction in a uniaxial woven fabric in which carbon fiber constitutes the warp.
Claim 12
Dependent Claim
28 words
The carbon fiber base material according to claim 1 where the said sheet-shaped carbon fiber base material is formed by inserting the metal wire at essentially equal spacings.
Claim 13
Dependent Claim
40 words
The carbon fiber base material according to claim 1 where the sheet-shaped carbon fiber base material is wound onto a paper cloth beam and the thickness of the metal wire is not more than the thickness of the base material.
Claim 14
Dependent Claim
16 words
The carbon fiber base material according to claim 1 where the metal wire is nichrome wire.
Claim 15
Dependent Claim
22 words
The carbon fiber base material according to claim 1 wherein the metal wire is iron wire or wire comprising an alloy thereof.
Claim 16
Dependent Claim
95 words
A laminate comprising a sheet-shaped carbon fiber material comprising reinforcing carbon fiber and metal wire integrally formed into said sheet-shaped carbon fiber base material, said sheet-shaped carbon fiber base material being selected from the group consisting of a woven fabric, a tow sheet and a prepreg, where the volume fraction of metal in said sheet-shaped reinforcing carbon fiber base material being no more than 4% in terms of the carbon fiber, and said reinforcing carbon fiber and said metal wire are laid-up in such a way that the metal wire insertion positions are mutually different.
Claim 17
Dependent Claim
95 words
A laminate comprising a sheet-shaped carbon fiber material comprising reinforcing carbon fiber and metal wire integrally formed into said sheet-shaped carbon fiber base material, said sheet-shaped carbon fiber base material being selected from the group consisting of a woven fabric, a tow sheet and a prepreg, where the volume fraction of metal in said sheet-shaped reinforcing carbon fiber base material being no more than 4% in terms of the carbon fiber, and said reinforcing carbon fiber and said metal wire are laid-up in such a way that the metal wire insertion positions are mutually different.
Claim 18
Dependent Claim
23 words
A laminate according to claim 15 where the metal wire is arranged in the widthwise direction of the sheet-shaped carbon fiber base material.
Claim 19
Dependent Claim
24 words
A laminate according to claim 15 which is a fiber reinforced plastic formed by impregnating the sheet-shaped carbon fiber base material with matrix resin.
Claim 20
Dependent Claim
39 words
A laminate according to claim 15 where the sheet-shaped carbon fiber base material is a woven fabric formed by interweaving metal wire in the weft arrangement direction in a uniaxial woven fabric in which carbon fiber constitutes the warp.
Claim 21
Dependent Claim
23 words
A laminate according to claim 15 where the sheet-shaped carbon fiber base material is formed by inserting metal wire at essentially equal spacings.
Claim 22
Dependent Claim
14 words
A laminate according to claim 15 where the metal wire is a ferromagnetic substance.
Claim 23
Dependent Claim
20 words
A laminate according to claim 20 where the metal wire is iron wire or a wire comprising an alloy thereof.
Claim 24
Dependent Claim
13 words
A laminate according to claim 15 where the metal wire is nichrome wire.
Claim 25
Dependent Claim
23 words
A laminate according to claim 14 where the metal wire is a metal wire covered around the outside with an insulating covering material.
Claim 26
Independent Claim
73 words
A method of detecting the number of plies in a laminate, comprising non-destructively sensing with a detector the presence of metal wire in a laminate of plies of a sheet-shaped carbon fiber base material comprising reinforcing carbon fiber and metal wire integrally formed into said sheet-shaped carbon fiber laminate material and determining the number of the plies in the laminate of the sheet-shaped carbon fiber base material based on the metal wires detected.
Claim 27
Independent Claim
73 words
A method of detecting the number of plies in a laminate, comprising non-destructively sensing with a detector the presence of metal wire in a laminate of plies of a sheet-shaped carbon fiber base material comprising reinforcing carbon fiber and metal wire integrally formed into said sheet-shaped carbon fiber laminate material and determining the number of the plies in the laminate of the sheet-shaped carbon fiber base material based on the metal wires detected.
Claim 28
Dependent Claim
26 words
A method of detecting the number of plies in a laminate according to claim 24 , wherein the sensing is carried out by a metal detector.
Claim 29
Dependent Claim
36 words
A method of detecting the number of plies in a laminate according to claim 24 where the surface of a concrete structure has been reinforced with the laminate and the number of plies therein is detected.
Claim 30
Dependent Claim
43 words
A method of detecting the number of plies in a laminate according to claim 24 where the detector is an infrared camera, the metal wire is made to generate heat by electromagnetic induction, and regions of heat generation detected with the infrared camera.
Claim 31
Dependent Claim
49 words
A method of detecting the number of plies in a laminate according to claim 24 where the detector is an infrared camera, the metal wire is made to generate heat by the passage of current through said metal wire, and regions of heat generation detected with the infrared camera.
Claim 32
Dependent Claim
57 words
A strain detection method for structures comprising a fiber reinforced plastic material formed from a reinforcing carbon fiber base material comprising reinforcing carbon fiber and metal wire integrally formed into said fiber reinforced plastic material, said method comprising detecting an amount of strain arising in the structure based on a change in resistance of the metal wire.
Claim 33
Dependent Claim
57 words
A strain detection method for structures comprising a fiber reinforced plastic material formed from a reinforcing carbon fiber base material comprising reinforcing carbon fiber and metal wire integrally formed into said fiber reinforced plastic material, said method comprising detecting an amount of strain arising in the structure based on a change in resistance of the metal wire.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-08-20 | 2005-02-19 | 2005-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-08-20 | 2009-02-19 | 2009-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-08-20 | 2013-02-19 | 2013-08-21 | $7700.00 | Window Closed / Lapsed |