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    MELT-SPINNING OF SILICA-CONTAINING POLYESTER INTO EXTREMELY FINE FIBER
    25.
    发明专利
    MELT-SPINNING OF SILICA-CONTAINING POLYESTER INTO EXTREMELY FINE FIBER 失效

    公开(公告)号：JPS58149324A

    公开(公告)日：1983-09-05

    申请号：JP3056282

    申请日：1982-03-01

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUMOTO TADAYUKI ,  ISHIBASHI HIDEO ,  NAKAGAWA KIYOSHI

    IPC: D01D1/10 ,  D01F6/92

    Abstract: PURPOSE:A melted polyester containing silica particles which have a specific or less value of primary particle sizes, and of coarse particle number of silica particles is filtered with a specific filtration layer and spun to produce extremely fine fibers of polyester without troubles such as reduction in yarn spinnability or increase in filtration pressure. CONSTITUTION:Melted polyester contaning silica fine particles of less than 100mmu size on the average and having less than 300/g or coarse particles is filtered and spun into a yarn of less than 3.5 denier filament thickness. The filtration is effected using a sand of more than 100 mesh satisfying the equation: the amount of sand W>=0.6(cm /g polyester/min) and the thickness of the sand layer L>=4(mm.) and/or a metallic nonwoven filter with an absolute filtration diameter of less than 30mu. These filtes develop large coarse particle dispersion a and filtration effects.

    UNIFORMLY DYED THICK AND THIN POLYESTER YARN AND ITS PRODUCTION
    26.
    发明专利
    UNIFORMLY DYED THICK AND THIN POLYESTER YARN AND ITS PRODUCTION 失效

    公开(公告)号：JPS5620611A

    公开(公告)日：1981-02-26

    申请号：JP9368579

    申请日：1979-07-25

    Applicant: TORAY INDUSTRIES

    Inventor： MATSUMOTO TADAYUKI ,  MINEO MASANORI ,  OOHASHI MASAYASU

    IPC: D06P3/52 ,  D01F6/62 ,  D02G3/02 ,  D02G3/04 ,  D06M11/00 ,  D06M13/188 ,  D06M23/00 ,  D06M101/00 ,  D06M101/16 ,  D06M101/30 ,  D06M101/32 ,  D06P3/54 ,  D06P5/22

    Abstract: PURPOSE:To obtain the titled thick and thin yarn, capable of giving a knitted or woven fabric having the hand of a spun yarn without causing cohesion between filaments, by dyeing a nonuniformly drawn filament yarn having a change in cross- sectional area in the axial direction, and a double refraction of the thick and thin parts in a specific range under specified conditions. CONSTITUTION:A nonuniformly drawn polyester filament yarn having varied cross- sectional areas, thick undrawn parts, preferably of double refraction 0.015-0.08, thin drawn parts, preferably of double refraction 0.09-0.2, and a U% of 2-20, preferably 4-16, is dyed at 130-140 deg.C by means of a benzoic acid carrier to give the objective uniformly dyed thick and thin yarn having a coefficient of variation in FYL value in the long direction of 0.8% or less. The nonuniformly drawn polyester yarn has preferably 100 fluffs or less per 2,000m.

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