METHOD FOR MANUFACTURING FLAME-RETARDANT OPTICAL FIBER COATING

PROBLEM TO BE SOLVED: To provide a method for manufacturing flame-retardant optical fiber coating with small defects in appearance by suppressing occurrence of lumps due to sublimation of melamine or the like onto a cord jacket, in attempting to make an optical fiber cord flame retardant using ammon...

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Bibliographic Details
Main Authors HAMADA KAZUAKI, AKASAKA NOBUHIRO
Format Patent
LanguageEnglish
Published 03.06.2003
Edition7
Subjects
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS
CHEMISTRY
GLASS
JOINING GLASS TO GLASS OR OTHER MATERIALS
METALLURGY
MINERAL OR SLAG WOOL
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS
SURFACE TREATMENT OF GLASS
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Summary:PROBLEM TO BE SOLVED: To provide a method for manufacturing flame-retardant optical fiber coating with small defects in appearance by suppressing occurrence of lumps due to sublimation of melamine or the like onto a cord jacket, in attempting to make an optical fiber cord flame retardant using ammonium polyphosphate coated by a sublimating substance such as melamine. SOLUTION: This method for manufacturing flame-retardant optical fiber coating comprises forming an optical fiber coating 4 by extrusion molding of a resin material through a coating die 5 in which a flame retardant containing sublimating substance is added to the base resin, where a vent-type extruder 6 is used for extruding the resin material to the coating die 5 to exhaust sublimated gas due to the sublimating substance. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20010356669