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    ULTRAFINE ION-EXCHANGE FIBER AND PRODUCTION THEREOF
    43.
    发明专利
    ULTRAFINE ION-EXCHANGE FIBER AND PRODUCTION THEREOF 失效

    公开(公告)号：JPH02289628A

    公开(公告)日：1990-11-29

    申请号：JP1664290

    申请日：1990-01-26

    Applicant: TORAY INDUSTRIES

    Inventor： KUBO NAMI ,  NOYORI MASARU ,  YOSHIOKA TOSHIO

    IPC: C08J5/20 ,  D01D5/30 ,  D01F8/04

    Abstract: PURPOSE:To obtain the subject fiber having excellent ion-exchange capability by spinning a three-component sea-island conjugate fiber from 3 kinds of polymers, drawing the fiber, removing the sea component polymer to obtain an ultrafine conjugate fiber consisting of two kinds of polymers and introducing an ion-exchange group to one of the polymers. CONSTITUTION:A three-component sea-island conjugate fiber is spun by using an island component consisting of a conjugate material (preferably multi-core sea-island conjugate material, etc.) composed of a polymer for accepting ion exchange group (preferably crosslinked polystyrene) and a reinforcing polymer (preferably polypropylene. etc.) and a sea component consisting of a polymer (preferably water-soluble polyester, etc.). The conjugate fiber is drawn, the sea component polymer is removed to obtain ultrafine conjugate fiber having a diameter of

    ULTRA-FINE ION-EXCHANGE FIBER AND PRODUCTION THEREOF
    44.
    发明专利
    ULTRA-FINE ION-EXCHANGE FIBER AND PRODUCTION THEREOF 失效

    公开(公告)号：JPH01282390A

    公开(公告)日：1989-11-14

    申请号：JP11092088

    申请日：1988-05-06

    Applicant: TORAY INDUSTRIES

    Inventor： KUBO NAMI ,  HENMI MASAHIRO ,  YOSHIOKA TOSHIO

    IPC: B01J47/12 ,  D01F6/60 ,  D06M13/02 ,  D06M13/184 ,  D06M13/203 ,  D06M14/12 ,  D06M101/00 ,  D06M101/16 ,  D06M101/30 ,  D06M101/32 ,  D06M101/34

    Abstract: PURPOSE:To obtain the subject ion-exchange fiber having extremely high ion- exchange speed and exhibiting remarkable effect in the ion-exchange and adsorption separation in dilute state by graft-polymerizing ion-exchange group to ultrafine fibers. CONSTITUTION:An ultrafine fibrillated fibers having a fiber diameter of 0.00001-0.1mum are produced by spinning a multicore sea-island type composite fiber composed of polyester, polyamide, etc., drawing said composite fiber and removing the sea-component from the product. The fibrillated ultrafine fiber is immersed in an acidic vinyl monomer having carboxyl group, preferably a solution of a mixture of acrylic acid and methacrylic acid and the monomers are polymerized to obtain an ultrafine ion-exchange fiber containing cation- exchange group introduced into the fiber. Since the obtained fiber has large specific surface area and extremely high ion-exchange rate, it can be suitably applied in a wide application field such as the softening of water, desalination of sea water and removal of harmful metals.

    POROUS MEMBRANE OF POLYTETRAFLUOROETHYLENE-BASE RESIN AND PRODUCTION THEREOF
    46.
    发明专利
    POROUS MEMBRANE OF POLYTETRAFLUOROETHYLENE-BASE RESIN AND PRODUCTION THEREOF 失效

    公开(公告)号：JPS6434407A

    公开(公告)日：1989-02-03

    申请号：JP19332287

    申请日：1987-07-30

    Applicant: TORAY INDUSTRIES

    Inventor： KAWAI TAKASHI ,  KATSU TOMOKO ,  YOSHIOKA TOSHIO

    IPC: D01F6/12 ,  B01D71/36 ,  B29C67/20 ,  B29K27/18 ,  C08J9/26

    Abstract: PURPOSE:To obtain a separation membrane wherein control of pore diameter is made easy and membrane thickness can be made thin by constituting the separation membrane of a porous membrane of polytetrafluoroethylene-base resin which consists of a fine porous network structure having a specified average pore diameter. CONSTITUTION:A uniform raw liquid is obtained by adding the aq. soln. of a fiber formable polymer such as sodium alginate to an aqueous dispersion in which polytetrafluoroethylene is dispersed in an aqueous medium contg. a surfactant. This raw liquid is extruded through a mouthpiece for hollow yarn together with core liquid consisting of a coagulating liquid such as a calcium chloride aq. soln. and coagulated in the coagulating liquid and washed with water and thereafter heat-treated at the temp. not lower than m.p. of the resin. This molded form is immersed into the mixed liquid of sulfuric acid and nitric acid to remove the fiber formable polymer and washed with water to obtain a porous hollow yarn membrane. Whereby the porous membrane of polytetrafluoroethylene-base resin which consists of a fine porous network structure having 0.01-2mu average pore diameter is obtained.

    ION EXCHANGE METHOD OF LIQUID CONTAINING COLLOIDAL MATERIAL
    50.
    发明专利
    ION EXCHANGE METHOD OF LIQUID CONTAINING COLLOIDAL MATERIAL 失效

    公开(公告)号：JPS60129179A

    公开(公告)日：1985-07-10

    申请号：JP23433883

    申请日：1983-12-14

    Applicant: TORAY INDUSTRIES

    Inventor： KOBAYASHI ISAO ,  YOSHIOKA TOSHIO ,  SHIMAMURA SEIJI

    IPC: C02F1/42 ,  B01D24/02 ,  B01J13/00 ,  B01J47/02 ,  B01J47/04

    Abstract: PURPOSE:To perform stably an ion exchange treatment of a liquid to be treated for a long period of time by subjecting further the liquid contg. colloidal material treated with ion exchange fibers to a treatment with a granular ion exchange resin. CONSTITUTION:Colloidal materials are adsorbed and filtered when a liquid to be treated is passed through a layer consisting essentially of ion exchange fibers having usually >=5cm height at 0.025-0.25g/cm density. Ions can be further removed therefrom by passing the liquid to be treated after the filtration through the layer of a commercially marketed spherical ion exchange resin having usually 100-1,000mu diameter. Such ion exchange treatment is adequate for a condensate treatment of a condensate of an atomic power plant, etc. and since said treatment has high power to remove the colloidal material and ions and obviates a decrease in filtration resistance and liquid flow resistance, the treatment at a high flow rate is made possible.

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