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    PRODUCTION OF ACRYLIC CARBON FIBER PRECURSOR
    65.
    发明专利
    PRODUCTION OF ACRYLIC CARBON FIBER PRECURSOR 失效

    公开(公告)号：JPS58156013A

    公开(公告)日：1983-09-16

    申请号：JP3519382

    申请日：1982-03-08

    Applicant: TORAY INDUSTRIES

    Inventor： SAKAKURA SHIZUKA ,  FUJII SHIGERU

    IPC: D01F6/18 ,  D01F9/22

    Abstract: PURPOSE:A solution f an acrylic polymer is subjected to spinning, while kept at a specific temperature, to maintain stable spinnability and yarn-forming properties, thus producing the titled precursor that can give carbon fibers with less yarn breakage and fluffing causing less fluctuation in woven fabric properties. CONSTITUTION:An acrylic polymer consisting of more than 98mol% of acrylonitrile is dissolved in an organic solvent to prepare a polymer solution of 15- 20wt% concentration and the spinning is carried out, while the solution is kept in a temperature range from the gel melting point (TG) to TG+30 deg.C.

    SPECIAL ACRYLIC FIBER
    68.
    发明专利
    SPECIAL ACRYLIC FIBER 失效

    公开(公告)号：JPS57139510A

    公开(公告)日：1982-08-28

    申请号：JP2016681

    申请日：1981-02-16

    Applicant: TORAY INDUSTRIES

    Inventor： TANAKA HIROYOSHI ,  SUZUKI MITSUO ,  FUJII SHIGERU

    IPC: D01F6/18 ,  D01F6/36 ,  D01F6/38

    Abstract: PURPOSE:Acrylic fibers, containing a specific amount of carboxylic acid groups and having a high shrinkage in boiling water and latent swelling property in water, and capable of giving a bulky spun polyester cloth, etc. by swelling a mixed spun fabric thereof with polyester fibers, heat-setting the fabric, and eluting the acrylic fibers. CONSTITUTION:Acrylonitrile is (co)polymerized in the presence of a vinyl monomer having a carboxylic acid group, e.g. (meth)acrylic acid, to give an acrylic polymer, which is then spun into the aimed special acrylic fibers having a carboxylic acid group content of 0.8-2.2mg equivalents/g, preferably 1.1-1.9mg equivalents/g, a shrinkage in boiling water >=30%, preferably >=45%, in aqueous solution of sodium carbonate (5g/l) and a shrinkage stress preferably >=30mg/ denier at this time. The fineness of the fibers is preferably 1.5-5 deniers. EFFECT:The elution is easily carried out with an aqueous solution of an alkali or hydrogen peroxide, and the scope of the application is very wide.

    PRODUCTION OF MIXED SPUN YARN
    70.
    发明专利
    PRODUCTION OF MIXED SPUN YARN 失效

    公开(公告)号：JPS55107515A

    公开(公告)日：1980-08-18

    申请号：JP1222579

    申请日：1979-02-07

    Applicant: TORAY INDUSTRIES

    Inventor： TANAKA HIROYOSHI ,  FUJII SHIGERU

    IPC: D02G3/04 ,  D01G13/00 ,  D02G3/02 ,  D02G3/44

    Abstract: PURPOSE:A mastersliver consisting of electrically conductive fibers bearing polyelectrolytes and nonconductive fibers is mixed with nonconductive fibers at a predetermined mixing ratio to produce said homogeneous mixed spun yarn with reduced defects as a yarn, high electrical conductivity and no problem in color tone. CONSTITUTION:Antistatic polymer includes polyelectrolytes and the resulting polymer is dispersed in a fiber-forming polymer in stripes. The master sliver is formed by mixing 10-60wt% of the electrically conductive fibers and 90-40wt% of nonconductive fibers and mixed with nonconductive fibers in the drawing step to reduce the mixing ratio of the conductive fibers to 0.1-5.0wt%. The resulting mixed spun yarn has reduced slubs and Uster unevenness.

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