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    POLYAMIDE SPECIAL FILAMENT AND MIXED YARN CONTAINING THE SAME
    14.
    发明专利
    POLYAMIDE SPECIAL FILAMENT AND MIXED YARN CONTAINING THE SAME 失效

    公开(公告)号：JPS55116815A

    公开(公告)日：1980-09-08

    申请号：JP2189079

    申请日：1979-02-28

    Applicant: TORAY INDUSTRIES

    Inventor： YAMAMOTO AKINORI ,  SHIMAMURA SEIJI ,  ARAYA YOSHIO

    IPC: D01F6/60 ,  D02G3/02 ,  D02G3/04 ,  D02G3/24

    Abstract: PURPOSE:Title filaments composed of a polyamide copolymer containing isophthalamid units are specified in difference between the grass transition point and crystallization point, thus showing improved thermal processability, initial modulus and dimensional stability. CONSTITUTION:In a polyamide copolymer that consists of crystalline polyamide units and amorphous polyamide units in which the amorphous polyamide units are isophthalamide ones, the glass transition point (Tg), crystallization temperature (Tc) and the difference between them (DELTATcg) satisfy equations given. The polyamid copolymers satisfying the equations are, e.g., 6.6/6.T/6.I(40/33/27wt%). The Tg is raised and DELTATcg is specified to give filaments with improved processability and other properties as polyester filaments.

    PRODUCTION OF IMPROVED POLYAMIDE FIBER
    15.
    发明专利
    PRODUCTION OF IMPROVED POLYAMIDE FIBER 失效

    公开(公告)号：JPS5557014A

    公开(公告)日：1980-04-26

    申请号：JP12948678

    申请日：1978-10-23

    Applicant: TORAY INDUSTRIES

    Inventor： YOSHIKAWA SEIICHI ,  SATOU TAKUJI ,  HIGUCHI TOMIMORI ,  SHIMAMURA SEIJI

    IPC: D01F6/90

    Abstract: PURPOSE:To obtain the title fibers having improved strength, luster, and transparency at a low cost, by melt spinning a blend of a thermoplastic polymer comprising acnylonitrile as a comonomer and a polyamide, and by cold-drawing the fibers thus obtained. CONSTITUTION:A blend of (A) a polyamide having a relative viscosity etar of 2.2-4.2 in sulfuric acid and (B) 0.2-2.0wt% of a thermoplastic polymer, e.g. acrylonitrile-methyl methacrylate copolymer, comprising acrylonitrile as a comonomer with an intrinsic viscosity [eta] of 0.3-1.2, measured by using a solution in chloroform, and the second-order transition point >=100 deg.C is melt spun at a speed >=400m/min, preferably 1,000-2,500m/min, into fibers. The fibers thus obtained are cold-drawn, preferably in the atmosphere at 20-30 deg.C and 40-90% RH at a draw ratio >=3 to give the desired fibers.

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