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    HOLLOW YARN FILM OF POLYACRYLONITRILE AND PRODUCTION THEREOF
    27.
    发明专利
    HOLLOW YARN FILM OF POLYACRYLONITRILE AND PRODUCTION THEREOF 失效

    公开(公告)号：JPS63190012A

    公开(公告)日：1988-08-05

    申请号：JP1623487

    申请日：1987-01-28

    Applicant: TORAY INDUSTRIES

    Inventor： HENMI MASAHIRO ,  TANAKA KAZUSANE ,  SHIMAMURA SEIJI

    IPC: C08J9/28 ,  D01D5/247 ,  D01F6/18

    Abstract: PURPOSE:To obtain the titled hollow yarn film having high water permeability and small pore diameter (distribution), by spinning a spinning stock solution comprising a specific acrylonitrile polymer by the use of a spinneret for sheath- core type hollow yarn and injecting a solution having low coagulating properties from a core part yarn. CONSTITUTION:An acrylonitrile polymer, preferably a polymer comprising one or more components of acrylonitrile polymer containing acrylonitrile having extremely high polymerization degree, is dissolved in an organic solvent such as dimethyl sulfoxide, etc., to prepare a spinning stock solution having 5-20wt.% total polymer concentration. Then the spinning stock solution is extruded from a sheath part by the use of a spinneret for sheath-core type hollow yarn, a coagulating solution having low coagulating properties is injected from a core part to yarn and the organic solvent is evaporated in a gas phase. Further the extruded yarn is immersed in a coagulating bath, washed and wound to give the aimed hollow yarn film.

    HOLLOW YARN MEMBRANE OF POLYSULFONE RESIN AND PRODUCTION THEREOF
    28.
    发明专利
    HOLLOW YARN MEMBRANE OF POLYSULFONE RESIN AND PRODUCTION THEREOF 失效

    公开(公告)号：JPS6399325A

    公开(公告)日：1988-04-30

    申请号：JP24317486

    申请日：1986-10-15

    Applicant: TORAY INDUSTRIES

    Inventor： TANAKA KAZUSANE ,  SHIMAGAKI MASAAKI ,  SHIMAMURA SEIJI

    IPC: C08J5/02 ,  B01D63/02 ,  C08J5/18 ,  D01D5/24 ,  D01F6/76 ,  D01F6/94

    Abstract: PURPOSE:To obtain the titled membrane having improved water wetting properties and smooth inner surface, slightly causing clogging, by adding an additive to a solution of a polysulfone resin and a hydrophilic high polymer in a solvent to give a stock solution for membrane making and using an injection solution in spinning. CONSTITUTION:First, a polysulfone resin and a hydrophilic high polymer (preferably polyvinyl pyrrolidone) are blended with a solvent (preferably DMF, etc.) and dissolved. Then, the solution is mixed with an additive (preferably water) to give a system, which is used as a stock solution for membrane making. In spinning an injection solution (preferably isopropyl myristate, etc.) to give the aimed membrane which consists of the polysulfone resin containing the hydrophilic high polymer, has >=1,000ml/hr.mmHg.m water permeability, excellent water wetting properties, improved smooth inner surface, >=500Angstrom average pore diameter on the inner surface and contains no >=5mu pores.

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