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    CONTINUOUS PRODUCTION OF CARBON FIBER
    11.
    发明专利
    CONTINUOUS PRODUCTION OF CARBON FIBER 失效

    公开(公告)号：JPH09268437A

    公开(公告)日：1997-10-14

    申请号：JP7040696

    申请日：1996-03-26

    Applicant: TORAY INDUSTRIES

    Inventor： NOJIRI HIRONOBU ,  TAKEDA SHIGERU ,  WASHIYAMA MASAYOSHI

    IPC: D06M11/00 ,  D01F9/22 ,  D06M11/05 ,  D06M101/00 ,  D06M101/16 ,  D06M101/18 ,  D06M101/28 ,  D06M101/40

    Abstract: PROBLEM TO BE SOLVED: To provide a method for continuously producing carbon fibers, capable of preventing the carbon fibers from wrapping around a roller or breaking and capable of continuously obtaining the carbon fibers little in fuzzes and excellent in handling in downstream processings in improved production efficiency by subjecting a precursor fiber bundle to a flame-resistant treatment, imparting water to the flame-resistant fiber bundle and subsequently carbonizing the treated fiber bundle. SOLUTION: This method for continuously producing carbon fibers comprises heating the precursor fiber bundle of polyacrylonitrile, etc., in an oxygen- containing atmosphere, such as air, heated at 200-300 deg.C, imparting water (preferably in an amount of 0.1-2.0 times the weight of the obtained flame-resistant fiber bundle) to the flame-resistant fiber bundle and subsequently carbonizing the fiber bundle into the carbon fibers. The density of the fibers is preferably controlled to >=500 filaments/mm, and a plurality of the precursor fiber bundles are preferably allowed to run side by side.

    PRODUCTION OF GRAPHITIZED FIBER
    12.
    发明专利
    PRODUCTION OF GRAPHITIZED FIBER 失效

    公开(公告)号：JPH08325852A

    公开(公告)日：1996-12-10

    申请号：JP13152995

    申请日：1995-05-30

    Applicant: TORAY INDUSTRIES

    Inventor： OZAKI KEIICHIRO ,  WASHIYAMA MASAYOSHI ,  SUEHIRO TAKEO

    IPC: D01F9/12 ,  D01F9/32

    Abstract: PURPOSE: To efficiently and stably produce graphitized fibers having excellent degree in suppressing generation of carbonized material accumulating in a furnace and suppressing depletion of graphite material. CONSTITUTION: In producing graphitized fibers having >=40×10 kgf/mm elastic modulus by passing carbon fibers through a furnace containing an inert gas atmosphere, maximum temperature in the furnace is made to at least >=2200 deg.C and flow rate of the inert gas in the furnace is made to

    CARBON FIBER CONTAINING FINE PARTICLE
    13.
    发明专利
    CARBON FIBER CONTAINING FINE PARTICLE 失效

    公开(公告)号：JPH04272236A

    公开(公告)日：1992-09-29

    申请号：JP3466491

    申请日：1991-02-28

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  YAMANE SHOJI

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

    Abstract: PURPOSE:To improve the tensile strength of a carbon fiber containing fine particles for improving the performance of the fiber or imparting additional function to the fiber. CONSTITUTION:The objective carbon fiber contains fine particles exclusively in the inner layer of single fiber. The fine particle-containing carbon fiber has high tensile strength and is hardly producible by conventional process. The fiber has high tensile strength as well as improved performance or imparted additional function by the mixing of fine particles. Since the carbon fiber has high tensile strength and excellent elastic modulus, compressive strength, electrical conductivity, electric wave shielding property or heat-resistance, it is useful as a reinforcing fiber for a composite material containing thermosetting resin, thermoplastic resin, ceramic, metal, etc., as a matrix, concretely, aircraft such as supersonic flying object, space articles such as rocket and truss, sports goods such as fishing rod and golf shaft, electric wave shielding material and heat- resistant member.

    PRODUCTION OF CONTINUOUS CARBON FIBER
    14.
    发明专利
    PRODUCTION OF CONTINUOUS CARBON FIBER 失效

    公开(公告)号：JPH11124741A

    公开(公告)日：1999-05-11

    申请号：JP28340897

    申请日：1997-10-16

    Applicant: TORAY INDUSTRIES

    Inventor： KONDO TAKASHI ,  WASHIYAMA MASAYOSHI ,  HIROSE TAKAMITSU

    IPC: D01F9/22 ,  B65H69/06

    Abstract: PROBLEM TO BE SOLVED: To reduce filament breaks and wrapping on a roller in the fiber firing (preoxidation) as much as possible at the end-connecting parts to each other of the organic fiber yarns to further increase the quality and the operability and prevent the significant accident as the burning in the firing oven in the production of carbon fiber. SOLUTION: In the production of carbon fiber, an organic fiber yarns of

    CARBON FIBER BUNDLE AND ITS PRODUCTION
    15.
    发明专利
    CARBON FIBER BUNDLE AND ITS PRODUCTION 失效

    公开(公告)号：JPH08158163A

    公开(公告)日：1996-06-18

    申请号：JP29825194

    申请日：1994-12-01

    Applicant: TORAY INDUSTRIES

    Inventor： WASHIYAMA MASAYOSHI ,  HIROSE TAKAMITSU ,  YAKUSHIJI KAZUYUKI

    IPC: D01F9/12 ,  D01F11/14

    Abstract: PURPOSE: To obtain a substantially non-twisted carbon fiber bundle excellent in handleability, resin impregnation property, etc., by subjecting acrylic fiber bundles to a frame-resisting or infusible treatment, paralleling the plural treated acrylic fiber bundles before or during a carbonization treatment, carbonizing the bundles and subsequently imparting a sizing anent to the paralleled bundles. CONSTITUTION: An acrylonitrile polymer is wet-spun and subsequently subjected to water washing, drawing, oiling, dry densifying and steam drawing treatments to obtain the acrylic precursor fiber yarn comprising >=6000 filaments, preferably >=12000 filaments. A plurality of the obtained precursor fiber bundles are subjected to a frame-resisting or non-melting treatment, paralleled to each other before or during a carbonization treatment, treated with a sizing agent consisting mainly of an epoxy resin in an amount of 0.5-10wt.%, and subsequently wound up on a bobbin or cheese to obtain the substantially non-twisted carbon fiber bundle having a fiber-splitting degree

    PRODUCTION OF CARBON FIBER
    17.
    发明专利
    PRODUCTION OF CARBON FIBER 失效

    公开(公告)号：JPH02289121A

    公开(公告)日：1990-11-29

    申请号：JP11660189

    申请日：1989-05-09

    Applicant: TORAY INDUSTRIES

    Inventor： WASHIYAMA MASAYOSHI ,  MATSUHISA YOJI ,  HIRAMATSU TORU

    IPC: D01F9/14

    Abstract: PURPOSE:To easily obtain a carbon fiber having dense texture and excellent strength, modulus, etc., by infusibilizing a carbon fiber precursor in an oxidizing atmosphere and carbonizing the fiber in an inert atmosphere under pressure. CONSTITUTION:A precursor for carbon fiber (e.g. acrylic fiber, pitch fiber or rayon fiber) is subjected to infusibilizing treatment or flame-resisting treatment in an oxidizing atmosphere (preferably air) under tension or drawing condition preferably at 200-300 deg.C. The produced fiber is carbonized by heating in an inert atmosphere at preferably 300-1000 deg.C under pressure (preferably 5-100kg/ cm .G) to obtain the objective carbon fiber.

    HIGH-PERFORMANCE ACRYLIC-BASED CARBON YARN
    18.
    发明专利
    HIGH-PERFORMANCE ACRYLIC-BASED CARBON YARN 失效

    公开(公告)号：JPH02251615A

    公开(公告)日：1990-10-09

    申请号：JP6715289

    申请日：1989-03-17

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUHISA YOJI ,  WASHIYAMA MASAYOSHI ,  HIRAMATSU TORU

    IPC: D01F6/18 ,  D01F6/54 ,  D01F9/22

    Abstract: PURPOSE:To obtain the title carbon yarn useful as materials to be exposed to high temperature such as aerospace material, having strength of resin impregnated strand of >= a specific value, excellent tensile strength and thermal oxidation resistance, containing a specific amount of zirconium (compound). CONSTITUTION:The objective yarn contains 0.1 to 10wt.% calculated as zirconium of zirconium (compound) and has >=450kg/cm strength of resin impregnated strand. Preferably zirconium (compound) is added as fine particles having

    BOBBIN
    19.
    发明专利
    BOBBIN 失效

    公开(公告)号：JPH10245159A

    公开(公告)日：1998-09-14

    申请号：JP4924897

    申请日：1997-03-04

    Applicant: TORAY INDUSTRIES

    Inventor： ITO TAKAHIRO ,  WASHIYAMA MASAYOSHI ,  MATSUDA KATSUMI

    IPC: B65H75/10 ,  B65H65/00 ,  B65H75/28 ,  D01D7/00

    Abstract: PROBLEM TO BE SOLVED: To easily and reliably perform switching operation when it is performed manually or by a machine such as an automatic doffing machine when a strand is wound by providing a groove in the outside surface circumferential direction of a lengthwise directional central part, and forming a shape of a bottom part of the groove into a V shape. SOLUTION: A bobbin has a groove 1 in the outside surface circumferential direction of its lengthwise directional central part, and a shape of a bottom part of the groove 1 is formed into a V shape. When a strand is wound round the bottom, the strand is hitched on the V-shaped groove 1 of the bottom, and gripping force with the bobbin is secured. A position to arrange the groove 1 is set to a part of about (±) 10% of the bobbin total length in the lengthwise direction with the lengthwise directional midpoint of the bobbin as a starting point. Since the groove 1 is arranged in the lengthwise directional central part, an edge angle of the strand at winding time is minimized, and dislocation of yarn from the groove 1 is prevented. Since a shape of a groove bottom part is formed in a V shape, a groove width is reduced in the depth direction, and gripping force increases in the groove deepest part by an improvement in adhesion to the bobbin of single fiber to constitute the strand.

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