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    PAN BASED PRECURSOR FOR CARBON FIBER AND METHOD OF PRODUCING THE SAME
    61.
    发明专利
    PAN BASED PRECURSOR FOR CARBON FIBER AND METHOD OF PRODUCING THE SAME 失效

    公开(公告)号：JP2002004175A

    公开(公告)日：2002-01-09

    申请号：JP2000184273

    申请日：2000-06-20

    Applicant: TORAY INDUSTRIES

    Inventor： YAMAZAKI KATSUMI ,  MATSUHISA YOJI ,  TOKUDA MASASHI

    IPC: D06M15/09 ,  D01F6/18 ,  D01F9/22

    Abstract: PROBLEM TO BE SOLVED: To provide a PAN based precursor for a graphite fiber having an excellent adhesion with a matrix resin and a high compression strength at 0 deg. (flexural strength practically) by suppressing crystallization of the surface, and to provide a method of manufacturing it. SOLUTION: This PAN based precursor for carbon fiber includes sugars as a character. This method of manufacturing the PAN based precursor for carbon fiber imparts sugars to a water swollen fiber and then dries and densifies in manufacturing the precursor for carbon fiber by wet spinning or dry/wet spinning a PAN based copolymer.

    CARBON FIBER AND CARBON FIBER-REINFORCED COMPOSITE MATERIAL
    62.
    发明专利
    CARBON FIBER AND CARBON FIBER-REINFORCED COMPOSITE MATERIAL 失效

    公开(公告)号：JPH11124743A

    公开(公告)日：1999-05-11

    申请号：JP28722897

    申请日：1997-10-20

    Applicant: TORAY INDUSTRIES

    Inventor： YAMAZAKI KATSUMI ,  MATSUHISA YOJI ,  SATO TAKUJI

    IPC: B29B11/16 ,  B29K105/06 ,  C08J5/04 ,  D01D5/253 ,  D01F9/22 ,  D06M11/00 ,  D06M11/80 ,  D06M101/00 ,  D06M101/40

    Abstract: PROBLEM TO BE SOLVED: To obtain carbon fiber that has high mechanical properties, even when it has a high fiber thickness, and can increase flexural strength of the composite material by attaining a specific tensile modulus. SOLUTION: This filament satisfies the formula: YM>480-46.2r, when the cross section of the filament is assumed to be a perfect circle, and diameter of the filament cross section and the tensile modulus are represented by r (in μm) and YM (in GPa), or satisfies the formula: TS>9.18-1.02r, when the tensile strength is represented by TS (in GPa) and satisfies the formula: BS>=2270-1.87YM, when the tensile modulus and the flexural strength at 0 deg. of uni-direction carbon fiber-reinforced composite material are represented by YM (in GPa) and BS (in MPa). In a preferred embodiment, this carbon fiber has the flexual strength at 0 deg. in the uni-direction carbon fiber composite material correspondng to >=75% of the 0 deg. tensile strength, and the radius of the cross section of the filament is 4-10 μm and the cross section has a tri- to penta-lobal form and contains boron in an amount of 50-5,000 ppm.

    PRECURSOR FOR CARBON FIBER, ITS PRODUCTION AND PRODUCTION OF CARBON FIBER
    64.
    发明专利
    PRECURSOR FOR CARBON FIBER, ITS PRODUCTION AND PRODUCTION OF CARBON FIBER 失效

    公开(公告)号：JPH09176923A

    公开(公告)日：1997-07-08

    申请号：JP27964696

    申请日：1996-10-22

    Applicant: TORAY INDUSTRIES

    Inventor： KOBAYASHI MAKOTO ,  MATSUHISA YOJI ,  SHIMIZU KAZUHARU

    IPC: D06M15/643 ,  D01F9/22 ,  D06M101/00 ,  D06M101/40

    Abstract: PROBLEM TO BE SOLVED: To easily produce a carbon fiber having high tensile strength and useful as a reinforcing fiber for composite material in high productivity by baking a carbon fiber precursor produced by forming an organic polymer coating layer on the surface of a precursor fiber. SOLUTION: The fiber surface of a carbon fiber precursor is coated with an organic polymer such as an acryl-silicone copolymer and the coated precursor fiber is baked to suppress the damage on the fiber surface and the welding of fibers in baking. The coating layer keeps its shape at the flameproofing treatment temperature and preferably has a carbonization residue of

    HOLLOW ACRYLIC FIBER AND PRODUCTION THEREOF
    69.
    发明专利
    HOLLOW ACRYLIC FIBER AND PRODUCTION THEREOF 失效

    公开(公告)号：JPH03241005A

    公开(公告)日：1991-10-28

    申请号：JP3693890

    申请日：1990-02-16

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUHISA YOJI ,  YAMAZAKI KATSUMI ,  HIRAMATSU TORU

    IPC: D01F6/18 ,  D01D5/24 ,  D01F8/08

    Abstract: PURPOSE:To obtain the subject fiber having fine denier, high flexibility and improved bulkiness, water-absorption, etc., and usable as a precursor for carbon fiber by preparing a polymer soluble in a coagulation, washing or drawing solution of a wet or dry-wet spinning process and spinning a sheath-core conjugate fiber with a sheath-core spinneret using the above polymer as the core. CONSTITUTION:The objective fiber having a single fiber denier of

    PRODUCTION OF FLAME-RESISTANT FIBER
    70.
    发明专利
    PRODUCTION OF FLAME-RESISTANT FIBER 失效

    公开(公告)号：JPH0333220A

    公开(公告)日：1991-02-13

    申请号：JP16314189

    申请日：1989-06-26

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUHISA YOJI ,  HIRAMATSU TORU ,  AKIMOTO TATSUO

    IPC: D01F9/14 ,  D01F9/22 ,  D01F9/32

    Abstract: PURPOSE:To obtain the subject fiber having excellent mechanical properties in a short time by heating a precursor for a flame-resistant fiber in a fluidized bed of thermal medium particles fluidized with an oxidizing gas while keeping the atmosphere in the bed in pressurized state, thereby converting the precursor fiber to flame-resistant and infusibilized state. CONSTITUTION:The objective fiber is produced by heating a precursor for a flame-resistant fiber (e.g. acrylic fiber, rayon, pitch fiber or phenolic resin fiber preferably having a single fiber fineness of 1.0-3.0d, a filament number of 6,000-50,000 and a total denier of 50,000-1,000,000) in a fluidized bed of thermal medium particles fluidized with an oxidizing gas while keeping the atmosphere in the bed in pressurized state, thereby converting the precursor fiber to flame- resistant and infusibilized state.

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