| 摘要 |
PROBLEM TO BE SOLVED: To provide an optic fiber core wire capable of maintaining adhesion force between an optic fiber bare wire and a primary layer stably, even when it is used in an immersed state in water.SOLUTION: An optic fiber core wire 1 is formed by laminating a primary layer 3 and a secondary layer 4 formed of ultraviolet-curable resin on an optic fiber bare wire 2. The primary layer 3 is formed by curing the ultraviolet-curable resin including a silane coupling agent which is taken in a resin skeleton, and a silane coupling agent which is not taken in the resin skeleton, and the silane coupling agent which is taken in the resin skeleton is formed of a compound containing a radical-polymerizable group and one or more methoxy groups, and the silane coupling agent which is not taken in the resin skeleton is formed of a compound which contains no radical-polymerizable group and has one or more ethoxy groups. |
