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    INFUSIBILIZATION OF PITCH-BASED MATERIAL
    41.
    发明专利
    INFUSIBILIZATION OF PITCH-BASED MATERIAL 失效

    公开(公告)号：JPH01282328A

    公开(公告)日：1989-11-14

    申请号：JP11401888

    申请日：1988-05-10

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUMOTO TADAYUKI ,  OBARA YASUO ,  AKIMOTO TATSUO

    IPC: D01F9/32 ,  D01F9/14

    Abstract: PURPOSE:To improve productivity in infusibilization treatment and obtain a carbon fiber at a low cost by setting the temperature at the time when a pitch yarn is charged to a temperature lower than the glass transition point thereof in infusibilizing the yarn in an atmosphere where solid powder is heated and fluidized by an oxidative gas. CONSTITUTION:The temperature at the time when a pitch yarn is charged into an atmosphere where solid powder such as silicon oxide is heated and fluidized by an oxidative gas (preferably air) is set to a temperature lower than the glass transition point of the pitch and the pitch yarn is subjected to infusibilization treatment in the above mentioned treatment. In case of infusibilization treatment by a continuous running of the pitch yarn in the above mentioned atmosphere, the inlet temperature is recommended to be set to a temperature lower than the glass transition temperature of the pitch and in case of a batch treatment, a yarn is recommended to be charged at a temperature lower than the glass transition temperature of the pitch followed by increasing the temperature.

    CALCINATION OF PITCH FIBER
    42.
    发明专利
    CALCINATION OF PITCH FIBER 失效

    公开(公告)号：JPH01282323A

    公开(公告)日：1989-11-14

    申请号：JP11401388

    申请日：1988-05-10

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUMOTO TADAYUKI

    IPC: D06M15/11 ,  D01F9/14 ,  D01F9/15 ,  D06M101/00

    Abstract: PURPOSE:To improve handling properties, prevent fusion in infusibilization and improve productivity by imparting a fiber size with no fluidity at ordinary temperatures which is decomposed and carried about in the air during calcination treatment to pitch yarns for collecting the pitch yarns, subsequently infusibilizing and calcining the pitch yarns. CONSTITUTION:A fiber size (e.g., PVA, vinyl acetate, cellulose acetate, starch, protein or colloids) with no fluidity at ordinary temperatures which is substantially decomposed and carried about in the air in calcination treatment is imparted to a pitch yarn in such a state as a solution, dispersion or powder and subjected to heating, drying, etc., to cover the pitch yarn. The yarn is then infusibilized and calcined, e.g., at 800-3000 deg.C to provide the objective pitch fiber.

    MELT SPINNING METHOD AND APPARATUS THEREFOR
    45.
    发明专利
    MELT SPINNING METHOD AND APPARATUS THEREFOR 失效

    公开(公告)号：JPS61258010A

    公开(公告)日：1986-11-15

    申请号：JP9802085

    申请日：1985-05-10

    Applicant: TORAY INDUSTRIES

    Inventor： AKIMOTO TATSUO ,  OGASAWARA MASASHI ,  MATSUMOTO TADAYUKI

    IPC: D01D5/08

    Abstract: PURPOSE:To melt spin a phenolic resin, etc., by melt extruding a spinning raw material through an extruder in the first stage, introducing the extruded spinning raw material into an extruder in the second stage, feeding the extruded material to a metering means in a state of excess extrusion of the extruder in the first stage while deaerating a gaseous component and filtering the fed material. CONSTITUTION:A spinning raw material 4 is melted with a screw 6 in an extruder 1 in the first stage, and an extruder 2 in the second stage has an extrusion side on the tip side from a vent hole 9 of a screw 7. A metering means 11 and filtering means 12 are provided in the course of a polymer channel 21 leading to a spinneret 14 and the operating conditions of the extruder 2 are set at a number of screw revolutions to give excess extrusion of the throughput of the extruder 1. A material e.g. phenolic resin, ethylene-polyvinyl alcohol based copolymer resin or copolymer or blend system of a polyester with epoxy, polyethylene glycol, as the raw material can be continuously melt spun.

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