公开(公告)号：AT176807T

公开(公告)日：1999-03-15

申请号：AT94306265

申请日：1994-08-25

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MASANOBU ,  ITOH MOTOI ,  MATSUHISA YOJI ,  SHIMIZU KAZUHARU

IPC: D01F11/14 ,  D01F11/16

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.

公开(公告)号：DE68928297D1

公开(公告)日：1997-10-09

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

IPC: D01F9/22 ,  D01F11/16 ,  C23C14/18

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.

公开(公告)号：EP0843033A4

公开(公告)日：1998-10-21

申请号：EP97922130

申请日：1997-05-22

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  KIBAYASHI MAKOTO ,  YAMASAKI KATSUMI ,  OKUDA AKIRA

IPC: D01F6/18 ,  D01F9/22 ,  D01F11/14 ,  D01F11/06

CPC classification number: D01F9/22 ,  D01F6/18 ,  D01F11/14 ,  Y10T428/2913 ,  Y10T428/2918 ,  Y10T428/292 ,  Y10T428/2964 ,  Y10T428/2967 ,  Y10T428/30

Abstract: Carbon fiber of which the tensile strength of resin-impregnated strand is high even when the thickness of each monofilament constituting the carbon fiber is large. This carbon fiber is characterized in that it comprises a plurality of monofilaments, and satisfies the relation sigma >/= 11.1 - 0.75 d, where d (unit: mu m) represents an average diameter of the monofilaments; and sigma (unit: GPa) the tensile strength of the resin-impregnated strand of the carbon fiber. This carbon fiber is preferably used as a material for forming energy-related equipment and parts, such as CNG tanks, flywheels, windmills and turbine blades, as a reinforcing material for structural equipment and parts, such as roads and bridges, and as a building and reinforcing material for a constructional material, such as lumbers and curtain walls.

Abstract translation: 即使构成碳纤维的各单丝的厚度大，树脂浸渍线材的拉伸强度也高的碳纤维。 该碳纤维的特征在于，其包含多根单丝，并且满足σ≥11.1-0.75d的关系，其中d（单位：μm）表示单丝的平均直径; 和σ（单位：GPa）表示碳纤维的树脂浸渍线材的拉伸强度。 该碳纤维优选作为用于形成CNG罐，飞轮，风车，涡轮叶片等能源相关设备，零件的材料，作为道路，桥梁等结构设备，部件的加强材料，建筑物 以及用于建筑材料（如木材和幕墙）的增强材料。

公开(公告)号：EP0750004A4

公开(公告)日：1999-02-17

申请号：EP96900187

申请日：1996-01-09

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  KOBAYASHI MASANOBU ,  OKUDA AKIRA ,  SHIMIZU KAZUHARU

IPC: C08J5/04 ,  C08J5/24

CPC classification number: C08J5/042 ,  C08J5/24 ,  C08J2363/00 ,  Y10S428/902 ,  Y10T428/30 ,  Y10T442/2984 ,  Y10T442/608 ,  Y10T442/674

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.

公开(公告)号：JPH1112856A

公开(公告)日：1999-01-19

申请号：JP16611597

申请日：1997-06-23

Applicant: TORAY INDUSTRIES

Inventor： YAMAZAKI KATSUMI ,  TANAKA MASARU ,  MATSUHISA YOJI

IPC: D06M11/00 ,  D01F6/18 ,  D01F9/22 ,  D01F11/12 ,  D01F11/14 ,  D06M11/80 ,  D06M13/02 ,  D06M13/184 ,  D06M13/203 ,  D06M13/248 ,  D06M13/256 ,  D06M15/643 ,  D06M101/00 ,  D06M101/16 ,  D06M101/18 ,  D06M101/22 ,  D06M101/24 ,  D06M101/40

Abstract: PROBLEM TO BE SOLVED: To produce an acrylic precursor fiber for carbon fibers, having ultrahigh denseness and a high orientation degree and excellent in heat resistance without causing bonding among single fibers at the time of baking by carrying the wet spinning of a specific spinning solution, regulating the resultant fibers to a prescribed swelling degree and applying a silicone-based oil agent thereto. SOLUTION: The wet spinning of a spinning solution of an acrylic copolymer such as an acrylic copolymer composed of acrylonitrile and 0.3-5.0 mol.% vinyl compound having carboxyl group (e.g. acrylic acid) having 0.9-1.5 intrinsic viscosity [η] at 22-35 wt.% copolymer concentration is carried out to provide a swollen yarn having 30-100% swelling degree. A silicone-based oil agent and a boron compound such as boric acid in an amount of preferably 0.01-3.0 wt.% (based on the fibers) are then applied to the tersultant yarn to afford an acrylic precursor fiber for carbon fibers having >=1.170 specific gravity and 90-95% crystal orientation degree with wide angle X-rays.

公开(公告)号：JPH0941226A

公开(公告)日：1997-02-10

申请号：JP19167295

申请日：1995-07-27

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MAKOTO ,  MATSUHISA YOJI ,  SHIMIZU KAZUHARU

IPC: D06M13/50 ,  D01F9/22 ,  D06M13/02 ,  D06M15/643 ,  D06M101/00 ,  D06M101/40

Abstract: PROBLEM TO BE SOLVED: To obtain a carbon fiber having a high tensile strength by applying an organic compound and/or a silicone compound formed as particles on the surface of a precursor fiber to suppress the adhesion among monofilaments. SOLUTION: This method for producing a carbon fiber is to form an organic compound and/or a silicone compound as particles and to apply the particles on the surface of a precursor fiber for producing the carbon fiber in order to suppress the direct contact among monofilaments. It is preferable to use the particles of a thermosetting resin or a thermoplastic resin having >=300 deg.C melting point, having

公开(公告)号：JPH08296124A

公开(公告)日：1996-11-12

申请号：JP9889395

申请日：1995-04-24

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MAKOTO ,  MATSUHISA YOJI ,  SHIMIZU KAZUHARU

IPC: C08J5/04 ,  D01F9/22

Abstract: PURPOSE: To obtain a non-circular cross section carbon fiber capable of improving the fundamental characteristics of its compressed system and capable of providing a composite material suitable as a structural material. CONSTITUTION: This carbon fiber has a non-circular cross section and the cross- sectional shape is a non-circular shape having at least a symmetric surface passing through the center of the figure, has a rotation symmetric angle θdefined θ=360 deg./n (n is an integer of 1-10), and has a base weight of >=0.1mg/m per a single fiber.

公开(公告)号：JPH07279040A

公开(公告)日：1995-10-24

申请号：JP19561294

申请日：1994-08-19

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MASANOBU ,  ITO MOTOI ,  MATSUHISA YOJI ,  SHIMIZU KAZUHARU

IPC: C08J5/04 ,  D01F9/12 ,  D01F11/16 ,  D06M10/00 ,  D06M13/02 ,  D06M13/11 ,  D06M13/165 ,  D06M101/00 ,  D06M101/40

Abstract: PURPOSE:To remarkably improve adhesive strength of a composite and further improve high order processability of carbon fiber and tensile strength of composite. CONSTITUTION:This carbon fiber is constituted by sizing a carbon fiber whose surface oxygen concentration O/C measured by an X ray photoelectric spectroscopy is =6 number of atoms between the epoxy group and the aromatic ring. Furthermore, a method for producing this carbon fiber is provided.

公开(公告)号：JPH05295616A

公开(公告)日：1993-11-09

申请号：JP612693

申请日：1993-01-18

Applicant: TORAY INDUSTRIES

Inventor： KOBAYASHI MAKOTO ,  MATSUHISA YOJI ,  YAMANE SHOJI

IPC: C01B31/04 ,  C08L33/18 ,  C08L79/04 ,  D01F6/18 ,  D01F6/54 ,  D01F6/74 ,  D01F9/20 ,  D01F9/22 ,  D01F9/24

Abstract: PURPOSE:To provide a precursor capable of producing a carbon fiber exhibiting a high strength, a high elasticity and a high compression strength. CONSTITUTION:This invented precursor for producing a carbon fiber is composed of a mixture of one or two or more kinds of substances selected from a polyimide, a polyamide-imide, a polybenzobisoxazole, a polybenzoxazole, a polyoxadiazole, a polybenzobisthiazole, a polybenzothiazole, a polybenzobisimidazole, a polybenzoimidazole, a polyphenylene vinylene and their precursors with a polyacrylonitrile-based polymer. The method for producing the recursor is another invention in this patent.

公开(公告)号：JPH04240221A

公开(公告)日：1992-08-27

申请号：JP626591

申请日：1991-01-23

Applicant: TORAY INDUSTRIES

Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  YAMANE SHOJI

IPC: D01F9/22

Abstract: PURPOSE:To obtain the title fiber having specific values in degree of orientation of crystal, crystal size, tensile modulus and composite compression strength, useful for space and airplane uses, sport use, etc., and being excellent in tensile modulus and composite compression strength. CONSTITUTION:A polyacrylonitrile (PAN)-based polymer (e.g. acrylonitrile copolymer, preferably having =2.0 intrinsic viscosity (n) by solution polymerization, etc., and used as a precursor is spun, preferably by wet spinning method, and the resultant fiber having =2.0g/d high tension in the above-mentioned graphitization to provide the objective fiber having 95-99% degree pi002 of crystal orientation, 60-80Angstrom crystal size Ldc, >=680GPa tensile modulus and >=600MPa composite compression strength.