| 摘要 |
PURPOSE:To impart characteristic to resist against external force to optical fiber itself by providing a sheath layer having high elasticity on the sheath layer of an optical fiber interposing a lubricating layer. CONSTITUTION:An optical fiber comprises a core 4, clad layer 5, a first sheath layer 6, a lubricating layer 7, and a second sheath layer 8. Namely, the second sheath layer 8 comprising a flame resistant resin consisting of polypropylene or nylon 6 admixed with a chlorinated or brominated or other flame retardant is provided on the first sheath layer 6 having high strength composed of polyproplyene or nylon 6, etc. interposing a lubricating layer 7 consisting of org. materials such as mineral oil or mineral grease, silicone oil or siliconegrease, etc. admixed with a solid lubricant such as graphite, Mo powder, etc. By this constitution, resistance to external force is imparted to the optical fiber itself.
|
