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Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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Filing date
Publication date
Application filed by Nippon Telegraph and Telephone CorpfiledCriticalNippon Telegraph and Telephone Corp
Priority to JP56000435ApriorityCriticalpatent/JPS57118044A/en
Publication of JPS57118044ApublicationCriticalpatent/JPS57118044A/en
PURPOSE: To maintain the quality of an optical fiber and to simplify a coating process by continuously subjecting the fiber to primary coating and secondary coating with resins each having a low Young's modulus in the drawing process.
CONSTITUTION: An optical fiber is continuously subjected to primary coating and secondary coating with thermoplastic or thermosetting resins. For example, the fiber surface is coated with an ethylene-vinyl acetate copolymer (EVA) as the material for the primary coating by means of a heat melting and coating device or the like, and it is continuously coated with a polyester-polyether copolymer as the material for the secondary coating through a heat melting and coating device or the like. The coated fiber is cooled and wound. In order to further enhance the flexibility of the materials, it is effective to foam the materials.
COPYRIGHT: (C)1982,JPO&Japio
JP56000435A1981-01-071981-01-07Coating method for optical fiber
PendingJPS57118044A
(en)