| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method whereby a resin-coated optical fiber is produced by a high-speed drawing. SOLUTION: In the production method, in conducting resin coating with an optical-fiber resin coating die 2 for supplying a liquid resin, a bathtub-like cavity section 3 having a through-hole formed at its bottom for introducing an optical fiber core wire is installed on the upper face of a die having a through-hole for introducing the optical fiber core wire; and the concentration of a gas with a low kinematic viscosity in the bathtub-like cavity is kept at≥75 vol.% and≤97 vol.%. An apparatus using the method for producing a resin-coated optical fiber is also provided. COPYRIGHT: (C)2004,JPO
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