中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

80 records (took 0.026 seconds)

    PRODUCTION OF PLASTIC OPTICAL FIBER
    72.
    发明专利
    PRODUCTION OF PLASTIC OPTICAL FIBER 失效

    公开(公告)号：JPS63303304A

    公开(公告)日：1988-12-09

    申请号：JP13816187

    申请日：1987-06-03

    Applicant: TORAY INDUSTRIES

    Inventor： FUJITA ISAO ,  TAZAWA HISASHI ,  SUGANUMA HEIROKU

    IPC: G02B6/00 ,  D01F8/10 ,  D02J1/22

    Abstract: PURPOSE:To improve bending resistance, light transmittability, etc., and to decrease the fluctuation in fiber diameter by heating and stretching a plastic optical fiber under specific conditions. CONSTITUTION:While the unstretched plastic optical fiber 1 discharged from a composite spinning mouth piece 2 and cooled 3 is destaticized 5, the fiber is guided to a stretching zone 6 at a speed V1m/sec (speed of rollers 4). Heating air flow is then blown from an introducing part 9 oppositely to the traveling direction of the fiber 1 and the fiber is stretched to a prescribed magnification by the pulling force of stretching rollers 10 at a speed V2m/sec on the rear side. The fiber is in succession subjected to destaticizing 5 and to a heat treatment 11 for a fixed length without contact in a similar device 6. The fiber is taken up 12 after sufficient cooling. The conditions of the roller speed are so selected as to satisfy 15A and the length of the zone 6 is designated as Lm. The more uniform optical fiber 1 is obtd. if -10

    RESIN FOR OPTICS
    74.
    发明专利
    RESIN FOR OPTICS 失效

    公开(公告)号：JPS63162702A

    公开(公告)日：1988-07-06

    申请号：JP30868486

    申请日：1986-12-26

    Applicant: TORAY INDUSTRIES

    Inventor： TANEICHI SEISHIRO ,  TAZAWA HISASHI ,  SUGANUMA HEIROKU

    IPC: G02B1/04 ,  C08F8/34 ,  C08L25/00 ,  C08L25/08 ,  C08L33/04 ,  C08L33/12

    Abstract: PURPOSE:To provide a resin for optics containing specific structural units which is superior in mechanical and optical properties, melt-flow characteristics and thermal decomposition resistance when melt-molded. CONSTITUTION:A radical-polymerizable monomer of formula I [wherein X is H, halogen or methyl; and Y is a (halogen-substituted) carboxylic ester group, (substituted) phenyl, nitrile or (N-substituted) amide] is polymerized in the presence of a chain transfer agent of formula II (wherein R is 1-18C prim-, sec- or tert-alkylene) to produce a resin for optics containing 0.07-2wt% structural units of formula III.

    POLYMERIZING AND SPINNING DEVICE FOR OPTICAL FIBER AND USING METHOD THEREOF
    75.
    发明专利
    POLYMERIZING AND SPINNING DEVICE FOR OPTICAL FIBER AND USING METHOD THEREOF 失效

    公开(公告)号：JPS612102A

    公开(公告)日：1986-01-08

    申请号：JP12070884

    申请日：1984-06-14

    Applicant: NIPPON TELEGRAPH & TELEPHONE ,  TORAY INDUSTRIES

    Inventor： KAINOU TOSHIKUNI ,  TAZAWA HISASHI ,  SAITOU KAZUHIKO ,  TANEICHI SEISHIROU ,  MATSUNAGA TADAYOSHI

    IPC: G02B6/00 ,  D01D5/08

    Abstract: PURPOSE:To improve cleanliness by constituting a titled device into the constitution in which a polymerizing vessel and a spinning device provided with a monomer separator are thoroughly separated and providing an engaging part which can attach and detach freely said vessel and spipping device to and from each other thereby cleaning thoroughly the polymerizing vessel and closing hermetically the vessel. CONSTITUTION:The polymerizing vessel is constituted with a polymerizing tank 1, a piping 2 for connection and a storage tank 3 for a cleaning liquid or monomer. The engaging part 11 for the spinning device provided with the monomer separator is fittably provided to a joint part 5. A part 6 for opening the sealing of the part 5 is cut and the engaging part 11 of the spinning device is connected upon ending of the polymn. with the above-mentioned constitution. The polymer for a core is then fed to the spinning device and the prescribed composite spinning is executed. The cleaning of the polymerizing vessel is executed by putting a solvent such as acetone into the tank 3, heating the same with a heating element 10, cooling the evaporated solvent in the tank 1 and cleaning the vessel with such solvent. The thorough cleaning and hermetic closing of the polymerizing vessel are thus made possible and the cleanliness is improved.

Patent Agency Ranking