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    PRODUCTION OF POLYESTER YARN
    11.
    发明专利
    PRODUCTION OF POLYESTER YARN 失效

    公开(公告)号：JPS61231216A

    公开(公告)日：1986-10-15

    申请号：JP6643885

    申请日：1985-04-01

    Applicant: TORAY INDUSTRIES

    Inventor： YAMASHITA MASAYUKI ,  OKA KENICHIRO ,  MINEO MASANORI

    IPC: D02J1/22 ,  D01D5/084 ,  D01D5/12 ,  D01F6/62 ,  D02J1/08

    Abstract: PURPOSE:To provide yarn with mechanical properties for practical use, solidifying extruded yarn once, subjecting it to heat drawing in a heating zone while sending a specific amount of a hot gas there to and entangling it at a position after an outlet at the bottom of the heating zone. CONSTITUTION:Yarn is subjected to heat drawing while sending 10-80Nl/min hot gas to a heating zone. The temperature of the hot gas is >=70 deg.C, preferably 100-300 deg.C. The drawing rate is >=3,000m/min, and the yarn is entangled at a position after an outlet at the bottom of the heating zone. When the distance x from the outlet of the heating zone to an entangling device is >=25cm, suppressing effects on fluff and end breakage are enlarged.

    POLYESTER MONOFILAMENT FOR SCREENING GAUZE SUPERIOR IN WEAVING PROPERTIES
    18.
    发明专利
    POLYESTER MONOFILAMENT FOR SCREENING GAUZE SUPERIOR IN WEAVING PROPERTIES 失效

    公开(公告)号：JPS63262289A

    公开(公告)日：1988-10-28

    申请号：JP9621287

    申请日：1987-04-21

    Applicant: TORAY INDUSTRIES

    Inventor： ITO YOSHIMITSU ,  OKA KENICHIRO

    IPC: B41N1/24 ,  B41C1/14 ,  D01F6/62 ,  D01F6/92

    Abstract: PURPOSE:To reduce the occurrence of white-powder scum to enable a monofilament to be woven with a fine denier and a high strength, by specifying the fineness, breaking strength, density, and worsted-yarn irregulalities. CONSTITUTION:A monofilament has a fineness of 6-15 denier, a breaking strength of 5.5-8.0 g/D, a density of 1.3580-1.3700 g/cm , and worsted-yarn irregularities of 0.3-1.0. With a density less than 1.3580 g/cm , the obtained monofilament has a high coefficient of heat shrinkage and, therefore, the obtained screening gauze is deteriorated in thermal stability. With worsted-yarn irregulalities more than 1.0, the occurrence of white-powder scum is remarkably increased. The 0.3 worsted-yarn irregularities is a limit value which can be accomplished by an existing technique. The monofilament has preferably a fineness of 6-15 denier. Namely, with a fineness more than 15 denier, an opening area cannot be improved in a high-mesh gauze having 250 meshes or more. On the other hand, a breaking strength of 5.5-8.0 g/D is preferable, and with more than 8.0 g/D the occurrence of white powder scum is increased.

    INORGANIC FINE PARTICLE-CONTAINING POLYESTER YARN
    20.
    发明专利
    INORGANIC FINE PARTICLE-CONTAINING POLYESTER YARN 失效

    公开(公告)号：JPS626911A

    公开(公告)日：1987-01-13

    申请号：JP14265285

    申请日：1985-07-01

    Applicant: TORAY INDUSTRIES

    Inventor： ITO YOSHIMITSU ,  OKA KENICHIRO ,  MINEO MASANORI

    IPC: D01F6/62 ,  D01F1/10 ,  D01F6/92

    Abstract: PURPOSE:The titled yarn containing inorganic fine particles having specific particle diameter, having index of double refraction, oiling water shrinkage percentage, dry heat shrinkage percentage, residual elongation and Young's modulus in specific ranges, causing a few end breakage during high-order processing and a small amount of occurrence of white powder. CONSTITUTION:The aimed polyester yarn containing inorganic fine particles such as titanium dioxide, calcium carbonate, etc., having g of particles having >=3mu particle diameter and fibrous physical properties as follows Index of double refraction DELTAn is 0.07-0.135, preferably 0.08-0.120, boiling water shrinkage percentage is

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