PLASTIC OPTICAL FIBER, OPTICAL FIBER CABLE AND PLUG-ATTACHED OPTICAL FIBER CABLE AND PRODUCTION METHODS THEREFOR

摘要

A production method for plastic optical fibers, characterized by comprising the steps of heating/stretching non-stretched plastic optical fibers obtained by melt spinning, and then heat-treating the stretched fibers at a peripheral velocity ratio between front and rear rollers of at least 0.5 and up to 1.2 and under heating conditions satisfying the relations, 4≤y≤-1.5x + 330, (Tgc - 5) DEG C≤x≤(Tgc + 110) DEG C,[Tgc: glass transition temperature of core material, x: heat treating temperature( DEG C), y: heat treating time (sec)], whereby plastic optical fibers small in heat shrinkage and excellent in heat resistance are provided.