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    PRODUCTION OF CARBON FIBER AND PRODUCTION APPARATUS
    8.
    发明专利
    PRODUCTION OF CARBON FIBER AND PRODUCTION APPARATUS 失效

    公开(公告)号：JPH10266024A

    公开(公告)日：1998-10-06

    申请号：JP9015097

    申请日：1997-03-24

    Applicant: TORAY INDUSTRIES

    Inventor： MORIKAWA HARUKI ,  ENDO MAKOTO ,  TAKECHI MIKIYA

    IPC: D01F9/22

    Abstract: PROBLEM TO BE SOLVED: To obtain a carbon fiber without causing yarn breakage due to unevenness of yarn thickness, ignition, etc., by subjecting a polyacrylonitrile-based precursor fiber bundle having thick fineness to flameproof treatment under specific conditions by passing the fiber bundle through a flameproof furnace in zigzags. SOLUTION: The cross section form of a polyacrylonitrile-based precursor fiber bundle having >=30,000 total denier is kept in a rectangle having 10-50 average flatness ratio defined by a ratio of yarn width to yarn thickness. Apparent average fineness per mm width of fiber bundle is preferably kept to 3,000 to 10,000 denier and the fiber bundle is passed through a flameproof furnace in zigzags and subjected to flameproof treatment at 200-300 deg.C. Then, the treated fiber bundle is subjected to carbonization treatment at 500-1,500 deg.C to provide the objective carbon fiber.

    METHOD FOR PRODUCING CARBON FIBER
    9.
    发明专利
    METHOD FOR PRODUCING CARBON FIBER 失效

    公开(公告)号：JP2001234434A

    公开(公告)日：2001-08-31

    申请号：JP2000047121

    申请日：2000-02-24

    Applicant: TORAY INDUSTRIES

    Inventor： KATSURA SOICHIRO ,  TAZAKI SHUICHI ,  TAKECHI MIKIYA

    IPC: D01F9/12 ,  D01F9/22

    Abstract: PROBLEM TO BE SOLVED: To provide a method for efficiently and continuously producing a carbon fiber for a long period by which, when a carbonizing treatment is carried out in the production of the carbon fiber, the load for threading operation is reduced, and the plugging of a waste gas line caused by a tar component included in a decomposition gas is prevented. SOLUTION: This method for producing the carbon fiber is characterized in that a single furnace having a waste gas-taking out line communicating with a waste gas-burning apparatus, and heated to 300-600 deg.C over the whole gas line is used as a heating furnace when converting a heat-stabilized fiber to the carbon fiber by heating the heat-stabilized fiber in an inert gas atmosphere at a high temperature of 300-1,600 deg.C in the heating furnace.

    METHOD FOR CONNECTING FIBER BUNDLE
    10.
    发明专利
    METHOD FOR CONNECTING FIBER BUNDLE 失效

    公开(公告)号：JP2000026026A

    公开(公告)日：2000-01-25

    申请号：JP19842798

    申请日：1998-07-14

    Applicant: TORAY INDUSTRIES

    Inventor： KASHIWAGI YASUHIRO ,  ENDO MAKOTO ,  TAKECHI MIKIYA

    IPC: B65H69/02 ,  D01F9/22 ,  D02G3/02 ,  D02J1/00

    Abstract: PROBLEM TO BE SOLVED: To improve the passing property in a higher level without using any binder by laminating fiber bundles whose ductility is not more than a specified value on each other so that the flatness is within a specified range, and connecting them through the slip in the rapid fluid treatment to reduce the breakage or scatter of the fiber. SOLUTION: A fiber bundle is a low ductility fiber bundle whose ductility is not more than 3%, includes a glass fiber bundle, an Aramid fiber bundle and a carbon fiber bundle, and is characterized as being high in strength, high in elasticity and brittle. In connecting the bundle, fiber bundles 4 are arranged approximately parallel to each other in order to laminate the fiber bundles 4 on each other, and the fiber bundles 4 are pulled and arranged in a flat shape without any stranding. The flatness of a laminated part is within a range of 10-500, preferably 25-250. The rapid fluid treatment is preferably effected by using air, a nozzle 1 is provided with a rectangular or elliptical area, and a circular ejection hole 2 is preferable. This method is preferably used in connecting fiber bundles to each other when switching a raw fiber bundle.

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