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公开(公告)号：DE69720650T4
公开(公告)日：2005-10-13
申请号：DE69720650
申请日：1997-05-22
Applicant: TORAY INDUSTRIES
Inventor： MATSUHISA YOJI , KIBAYASHI MAKOTO , YAMASAKI KATSUMI , OKUDA AKIRA
Abstract: The object of the present invention is to provide carbon fibers with high tensile strength as a resin impregnated strand even if the single filaments constituting the carbon fibers are thick. The carbon fibers of the present invention consisting of a plurality of single filaments are characterized by satisfying the following relation: where sigma is the tensile strength of said carbon fibers as a resin impregnated strand (in GPa) and d is the average diameter of said single filaments (in mu m). The carbon fibers can be preferably used as a material for forming energy-related apparatuses such as CNG tanks, fly wheels, wind mills and turbine blades, a material for reinforcing structural members of roads, bridge piers, etc., and also a material for forming or reinforcing architectural members such as timber and curtain walls.
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公开(公告)号：DE69720650T2
公开(公告)日：2003-10-30
申请号：DE69720650
申请日：1997-05-22
Applicant: TORAY INDUSTRIES
Inventor： MATSUHISA YOJI , KIBAYASHI MAKOTO , YAMASAKI KATSUMI , OKUDA AKIRA
Abstract: The object of the present invention is to provide carbon fibers with high tensile strength as a resin impregnated strand even if the single filaments constituting the carbon fibers are thick. The carbon fibers of the present invention consisting of a plurality of single filaments are characterized by satisfying the following relation: where sigma is the tensile strength of said carbon fibers as a resin impregnated strand (in GPa) and d is the average diameter of said single filaments (in mu m). The carbon fibers can be preferably used as a material for forming energy-related apparatuses such as CNG tanks, fly wheels, wind mills and turbine blades, a material for reinforcing structural members of roads, bridge piers, etc., and also a material for forming or reinforcing architectural members such as timber and curtain walls.
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公开(公告)号：DE69720650T3
公开(公告)日：2007-07-05
申请号：DE69720650
申请日：1997-05-22
Applicant: TORAY INDUSTRIES
Inventor： MATSUHISA YOJI , KIBAYASHI MAKOTO , YAMASAKI KATSUMI , OKUDA AKIRA
Abstract: The object of the present invention is to provide carbon fibers with high tensile strength as a resin impregnated strand even if the single filaments constituting the carbon fibers are thick. The carbon fibers of the present invention consisting of a plurality of single filaments are characterized by satisfying the following relation: where sigma is the tensile strength of said carbon fibers as a resin impregnated strand (in GPa) and d is the average diameter of said single filaments (in mu m). The carbon fibers can be preferably used as a material for forming energy-related apparatuses such as CNG tanks, fly wheels, wind mills and turbine blades, a material for reinforcing structural members of roads, bridge piers, etc., and also a material for forming or reinforcing architectural members such as timber and curtain walls.
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公开(公告)号：DE69416553D1
公开(公告)日：1999-03-25
申请号：DE69416553
申请日：1994-08-25
Applicant: TORAY INDUSTRIES
Inventor： KOBAYASHI MASANOBU , ITOH MOTOI , MATSUHISA YOJI , SHIMIZU KAZUHARU
Abstract: Carbon fibers with a surface oxygen concentration (O/C ratio) of 0.20 or less as measured by X-ray photoelectron spectroscopy and (a) a surface concentration of hydroxyl groups (C-OH/C ratio) of 0.5% or greater as measured by chemical modification X-ray photoelectron spectroscopy and a surface concentration of carboxylic groups (COOH/C ratio) of 2.0% or less as measured by chemical modification X-ray photoelectron spectroscopy, or (b) a surface nitrogen concentration (N/C ratio) of 0.02 or greater, as measured by X-ray photoelectron spectroscopy, additionally comprise, as a sizing agent, an aliphatic compound which has multiple epoxy groups or an aromatic compound which has multiple epoxy groups, the number of atoms between the epoxy groups and an aromatic ring being 6 or greater. They are prepared by electrolyzing a carbon fiber in an alkaline aqueous solution, or electrolyzing a carbon fiber in an acidic aqueous solution followed by washing with an alkaline aqueous solution, and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater. Alternatively, they are prepared by electrolyzing a carbon fiber in an aqueous solution of an ammonium salt and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater.
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公开(公告)号：CA2130588A1
公开(公告)日：1995-02-26
申请号：CA2130588
申请日：1994-08-22
Applicant: TORAY INDUSTRIES
Inventor： KOBAYASHI MASANOBU , ITOH MOTOI , MATSUHISA YOJI , SHIMIZU KAZUHARU
Abstract: CARBON FIBERS AND PROCESS FOR PREPARING SAME Carbon fibers with a surface oxygen concentration (O/C ratio) of 0.20 or less as measured by X-ray photoelectron spectroscopy, a surface concentration of hydroxyl groups (C-OH/C ratio) of 0.5% or greater as measured by chemical modification X-ray photoelectron spectroscopy and a surface concentration of carboxylic groups (COOH/C ratio) of 2.0% or less as measured by chemical modification X-ray photoelectron spectroscopy, and comprising applied as a sizing agent an aliphatic compound which has multiple epoxy groups or an aromatic compound which has multiple epoxy groups, the number of atoms between the epoxy groups and an aromatic ring being 6 or greater. They are prepared by electrolyzing a carbon fiber in an alkaline aqueous solution, or electrolyzing a carbon fiber in an acidic aqueous solution followed by washing with an alkaline aqueous solution, and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater. Alternatively, they are prepared by electrolyzing a carbon fiber in an aqueous solution of an ammonium salt and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater.
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Patent Agency Ranking
公开(公告)号：DE69632846T2
公开(公告)日：2005-07-14
申请号：DE69632846
申请日：1996-01-09
Applicant: TORAY INDUSTRIES
Inventor： MATSUHISA YOJI , KOBAYASHI MASANOBU , OKUDA AKIRA , SHIMIZU KAZUHARU
Abstract: A prepreg comprising noncircular cross-section carbon fibers and a matrix resin having a flexural elastic modulus of 2.7 GPa or more and a water absorption of 3.4 % or less under hot-wet conditions after curing; and another prepreg comprising carbon fibers and a matrix resin having an open-hole compression strength under hot-wet conditions and a compression strength after impact under room-temperature conditions of a quasi-isotropic material after curing of each 275 MPa or more. Carbon fiber-reinforced composite materials produced by curing these prepregs are excellent in open-hole compression strength under hot-wet conditions and in compression strength after impact, and can be suitably used especially as an aircraft primary structure material.
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公开(公告)号：DE69720650D1
公开(公告)日：2003-05-15
申请号：DE69720650
申请日：1997-05-22
Applicant: TORAY INDUSTRIES
Inventor： MATSUHISA YOJI , KIBAYASHI MAKOTO , YAMASAKI KATSUMI , OKUDA AKIRA
Abstract: The object of the present invention is to provide carbon fibers with high tensile strength as a resin impregnated strand even if the single filaments constituting the carbon fibers are thick. The carbon fibers of the present invention consisting of a plurality of single filaments are characterized by satisfying the following relation: where sigma is the tensile strength of said carbon fibers as a resin impregnated strand (in GPa) and d is the average diameter of said single filaments (in mu m). The carbon fibers can be preferably used as a material for forming energy-related apparatuses such as CNG tanks, fly wheels, wind mills and turbine blades, a material for reinforcing structural members of roads, bridge piers, etc., and also a material for forming or reinforcing architectural members such as timber and curtain walls.
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公开(公告)号：DE68928297T2
公开(公告)日：1998-01-15
申请号：DE68928297
申请日：1989-12-27
Applicant: TORAY INDUSTRIES , TORAY RESEARCH CENTER INC
Inventor： MATSUHISA YOJI , HIRAMATSU TORU , YOSHIDA KAZUO , KATAGIRI GEN
Abstract: Disclosed is a carbon fiber made from an acrylic fiber, the carbon crystal of which has a crystal size Lc of 15 to 65 ANGSTROM as determined by the wide angle X-ray diffractometry. This carbon fiber has regions with a lower crystallinity in the surface layer portion thereof than that of the central portion thereof, and the compressive strength sigma cf (GPa) of the single filament thereof determined by the loop method satisfies formula (I): sigma cf >/= 10.78 - 0.1176 x Lc (I). The carbon fiber is produced by ionizing in vacuo an atom or molecule which is solid or gaseous at normal temperature, accelerating the ionized atom or molecule by an electric field, and implanting the accelerated ionized atom or molecule in a bundle of carbon fibers.
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公开(公告)号：DE69632846D1
公开(公告)日：2004-08-12
申请号：DE69632846
申请日：1996-01-09
Applicant: TORAY INDUSTRIES
Inventor： MATSUHISA YOJI , KOBAYASHI MASANOBU , OKUDA AKIRA , SHIMIZU KAZUHARU
Abstract: A prepreg comprising noncircular cross-section carbon fibers and a matrix resin having a flexural elastic modulus of 2.7 GPa or more and a water absorption of 3.4 % or less under hot-wet conditions after curing; and another prepreg comprising carbon fibers and a matrix resin having an open-hole compression strength under hot-wet conditions and a compression strength after impact under room-temperature conditions of a quasi-isotropic material after curing of each 275 MPa or more. Carbon fiber-reinforced composite materials produced by curing these prepregs are excellent in open-hole compression strength under hot-wet conditions and in compression strength after impact, and can be suitably used especially as an aircraft primary structure material.
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公开(公告)号：DE69416553T2
公开(公告)日：1999-06-24
申请号：DE69416553
申请日：1994-08-25
Applicant: TORAY INDUSTRIES
Inventor： KOBAYASHI MASANOBU , ITOH MOTOI , MATSUHISA YOJI , SHIMIZU KAZUHARU
Abstract: Carbon fibers with a surface oxygen concentration (O/C ratio) of 0.20 or less as measured by X-ray photoelectron spectroscopy and (a) a surface concentration of hydroxyl groups (C-OH/C ratio) of 0.5% or greater as measured by chemical modification X-ray photoelectron spectroscopy and a surface concentration of carboxylic groups (COOH/C ratio) of 2.0% or less as measured by chemical modification X-ray photoelectron spectroscopy, or (b) a surface nitrogen concentration (N/C ratio) of 0.02 or greater, as measured by X-ray photoelectron spectroscopy, additionally comprise, as a sizing agent, an aliphatic compound which has multiple epoxy groups or an aromatic compound which has multiple epoxy groups, the number of atoms between the epoxy groups and an aromatic ring being 6 or greater. They are prepared by electrolyzing a carbon fiber in an alkaline aqueous solution, or electrolyzing a carbon fiber in an acidic aqueous solution followed by washing with an alkaline aqueous solution, and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater. Alternatively, they are prepared by electrolyzing a carbon fiber in an aqueous solution of an ammonium salt and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater.
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