中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

9 records (took 0.022 seconds)

    PRODUCTION OF GRAPHITE FIBER
    1.
    发明专利
    PRODUCTION OF GRAPHITE FIBER 失效

    公开(公告)号：JP2001049535A

    公开(公告)日：2001-02-20

    申请号：JP2000152893

    申请日：2000-05-24

    Applicant: TORAY INDUSTRIES

    Inventor： SUEHIRO TAKEO ,  TAKEDA SHIGERU ,  SAKIMURA SHOTA

    IPC: D01F9/14

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing graphite fiber, capable of suppressing growth of silicon carbide and attachment of silicon carbide to fiber to be graphitized traveling through a muffle furnace in production process of a graphite fiber and attaining remarkable improvement of productivity of graphite fiber. SOLUTION: In a method for producing graphite fiber comprising graphitizing a fiber 2 to be graphitized in which silicon compound is contained by continuously traveling the fiber in a muffle furnace kept in inert atmosphere having 2,200-3,000 temperature, the distance between a muffle side wall 4 and the fiber 2 to be graphitized is kept within the range of 3-25 mm.

    CONTINUOUS PRODUCTION OF CARBON FIBER
    4.
    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 CARBON FIBER
    5.
    发明专利
    PRODUCTION OF CARBON FIBER 失效

    公开(公告)号：JPH09268436A

    公开(公告)日：1997-10-14

    申请号：JP7462896

    申请日：1996-03-28

    Applicant: TORAY INDUSTRIES

    Inventor： TAKEDA SHIGERU ,  WASHIYAMA MASAYOSHI ,  TAKEUCHI IKUO

    IPC: D01F9/12

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing carbon fibers, capable of preventing the mixing adjacent precursor fibers due to the decrease in the distance among of the precursor fiber strands on a grooved roller for simultane ously sintering the precursor fibers and thereby capable of improving the process ability of the precursor fibers by blowing a gas toward the outside of the grooved roller for the precursor fibers on the feeding side of the grooved roller. SOLUTION: This method for producing carbon fibers contains guiding a plurality of precursor fiber 4 into the grooves of a grooved roller 3. Therein, just before the fibers 4 reach the roller 3, a gas 1 is blown from a pipe 2 for blowing the gas to the outside of the roller 3 in order to prevent the mutual interference of the adjacent fibers. The gas is preferably blown at a velocity of >=0.5m/sec and at a blowing angle of >=10 degree to the fibers. The tensions of the fibers at the gas-blowing positions are preferably 0.05-0.3g/d, and the gas is preferably blown on the fibers just in front of the fiber-guiding positions on the grooved roller.

    APPLICATION OF SIZING TO CARBON FIBER
    6.
    发明专利
    APPLICATION OF SIZING TO CARBON FIBER 失效

    公开(公告)号：JPH07145549A

    公开(公告)日：1995-06-06

    申请号：JP28833093

    申请日：1993-11-17

    Applicant: TORAY INDUSTRIES

    Inventor： TAKEDA SHIGERU ,  HANANO TORU

    IPC: D06B1/02 ,  D06B3/04

    Abstract: PURPOSE:To suppress the formation of a sizing liquid film between adjacent yarns and remarkably decrease the uneven application of a sizing agent by immersing carbon fiber yarns in a sizing agent liquid and blowing compressed gas against the yarns at a specific flow rate. CONSTITUTION:Non-twisted carbon fiber yarns 2 are transferred through a roller 1 and immersed in a sizing liquid 3 composed of a solution or a dispersion of a sizing agent. The formation of a liquid film between adjacent yarns is prevented by blowing a normal temperature compressed air flow through small nozzles of a pipe 4 placed several cm above the yarns 2 at a flow rate between 0.5 and 10m/sec and higher than the surface tension of the liquid.

    METHOD FOR PRODUCING CARBON FIBER
    8.
    发明专利
    METHOD FOR PRODUCING CARBON FIBER 审中-公开

    公开(公告)号：JP2003096625A

    公开(公告)日：2003-04-03

    申请号：JP2002186142

    申请日：2002-06-26

    Applicant: TORAY INDUSTRIES

    Inventor： ITO TAKESHI ,  KOBAYASHI MAKOTO ,  TAKEDA SHIGERU

    IPC: D01F9/22

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a carbon fiber by using a horizontal carbonization furnace, effectively discharging the waste gas by controlling the pressures in the furnace at the inlet side and the outlet side of a flame- resistant yarn, giving carbon fibers having stable quality and preventing the leakage of the waste gas. SOLUTION: A gas is flowed in the horizontal carbonization furnace from the inlet side to the outlet side of the flame-resistant yarn and the waste gas in the furnace is discharged from a waste gas suction port. The yarn is carbonized while maintaining the pressure in the furnace at the yarn-inlet and outlet sides to be higher than the atmospheric pressure and keeping the average pressure gradient from the outlet and inlet sides to a waste gas suction port to >=0.25 Pa/m.

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

    公开(公告)号：JP2002061034A

    公开(公告)日：2002-02-28

    申请号：JP2000247297

    申请日：2000-08-17

    Applicant: TORAY INDUSTRIES

    Inventor： NAKAMURA KIYOHIKO ,  TAKEDA SHIGERU

    IPC: D01F9/12 ,  D01F9/22

    Abstract: PROBLEM TO BE SOLVED: To provide a method for a manufacturing carbon fiber preventing yarn breakage due to abrasion and shagginess of the carbon fiber when blending. SOLUTION: The method for manufacturing a carbon fiber is characterized in that, in an oxidizing process, where the fiber yarn streches or shrinks, of a continuous process for manufacturing the carbon fiber, the speed of the rotation of a driving roll out of the group of the rolls by which the fiber yarn is transferred is controlled at an average value of the rotation speeds of the front and the back free roll which are adjacent to the driving roll in the running direction of the fiber yarn.

Patent Agency Ranking