| 摘要 |
A coated glass fiber 1 comprising a glass fiber 10 and a resin coating layer containing an inner layer 20 and an outer layer 30 provided on the outer circumference of the glass fiber 10, wherein the resin constituting the inner layer 20 is formed by curing a urethane-based ultraviolet curable resin composition containing a surfactant in an amount of 0.1 to 1.0% by weight and Young's modulus thereof is from 0.3 to 10 MPa. The coated optical fiber has a good water immersion resistance. |
