| 摘要 |
PURPOSE:To prevent occurrence of a slipping phenomenon and homogeneously and stably coat an optical fiber at a high speed, by coating a coated or uncoated optical fiber drawn from an optical fiber preform with a liquid ultraviolet curing type resin under specific conditions and curing the resin. CONSTITUTION:An optical fiber drawn from an optical fiber preform or a coated optical fiber is coated with a liquid ultraviolet curing type resin, e.g. urethane acrylate, through a coating die under conditions of 500-3,000cP viscosity under low shearing speed at the coating temperature and 60-100 deg.C temperature and then passed through an ultraviolet ray irradiation device to cure the resin.
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