| 摘要 |
PURPOSE:To draw a glass fiber of high purity for optical transmission at a high speed by passing an optical fiber after spinning through a cooling die in which a non-reactive liquid material flows to cool the fiber then passing the same through a coating die in which a curable resin flows to coat the resin on the fiber and baking the same. CONSTITUTION:A base fiber 1 of quartz glass is heated to about 2,000 deg.C and is spun to a fiber of around 150mum outside diameter by a drawing furnace 2. The fiber 1 after spinning is passed through a cooler 3 and a resin coater 6 and is cooled down to around the room temp., whereafter a resin compsn. is coated and further the resin compsn. is baked with a curing furnace 9. The coated optical fiber is coiled on a coiler 10. The optical fiber is cooled in said cooler 3 while the non-reactive liquid material excluding a hardener, crosslinking agent, curing catalyst, curing accelerator, photosensitizer, etc. from the above-described resin comps. is supplied 4 in the advancing direction of the optical fiber. The curable resin compsn. together with the hardener, curing accelerator, curing catalyst, crosslinking agent, photosensitizer, etc. are coated and baked on the cooled optical fiber in the coater 6. |
