JPS56110906A - Fire retardant glass fiber for light transmission - Google Patents

Fire retardant glass fiber for light transmission

Info

Publication number
JPS56110906A
JPS56110906A JP1307280A JP1307280A JPS56110906A JP S56110906 A JPS56110906 A JP S56110906A JP 1307280 A JP1307280 A JP 1307280A JP 1307280 A JP1307280 A JP 1307280A JP S56110906 A JPS56110906 A JP S56110906A
Authority
JP
Japan
Prior art keywords
optical fiber
coat
fire retardant
heat
glass fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1307280A
Other languages
Japanese (ja)
Inventor
Yahei Oyamada
Chihaya Tanaka
Toru Yamanishi
Yuji Kameo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1307280A priority Critical patent/JPS56110906A/en
Publication of JPS56110906A publication Critical patent/JPS56110906A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/4436—Heat resistant

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)

Abstract

PURPOSE:To obtain a fire retardant optical fiber, by providing a liquid material which is changed into a material having a heat insulating function by heat between the optical fiber and a pipe-shaped protective coat that protects the optical fiber. CONSTITUTION:A spare coat 2 is applied when necessary on the outer circumference of the main body 1 of optical fiber. The coat 2 is then put into the pipe-shaped coat 4 made of a fire retardant material. After this, a liquid material 3, which is carbonized and carbonized with foaming by the heat to produce a number of micro pores and then prevents the burning of the main body 1 of optical fiber by an insulating effect of air and heat, is filled among the optical fiber 1, the coat 2 and the coat 4 each.
JP1307280A 1980-02-07 1980-02-07 Fire retardant glass fiber for light transmission Pending JPS56110906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1307280A JPS56110906A (en) 1980-02-07 1980-02-07 Fire retardant glass fiber for light transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1307280A JPS56110906A (en) 1980-02-07 1980-02-07 Fire retardant glass fiber for light transmission

Publications (1)

Publication Number Publication Date
JPS56110906A true JPS56110906A (en) 1981-09-02

Family

ID=11822941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1307280A Pending JPS56110906A (en) 1980-02-07 1980-02-07 Fire retardant glass fiber for light transmission

Country Status (1)

Country Link
JP (1) JPS56110906A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02123304A (en) * 1988-10-31 1990-05-10 Fujikura Ltd Optical fiber for fire detection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031484B2 (en) * 1971-11-10 1975-10-11
JPS5125787A (en) * 1974-08-26 1976-03-02 Sumitomo Electric Industries
JPS5397444A (en) * 1977-02-04 1978-08-25 Nippon Telegr & Teleph Corp <Ntt> Self-repair type optical fiber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031484B2 (en) * 1971-11-10 1975-10-11
JPS5125787A (en) * 1974-08-26 1976-03-02 Sumitomo Electric Industries
JPS5397444A (en) * 1977-02-04 1978-08-25 Nippon Telegr & Teleph Corp <Ntt> Self-repair type optical fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02123304A (en) * 1988-10-31 1990-05-10 Fujikura Ltd Optical fiber for fire detection

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