| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber unit capable of preventing an optical fiber stored in a film from abruptly springing out at the time of intermediate branching, and of easily forming a film during production.SOLUTION: The optical fiber unit includes: a cable core 11a in which a plurality of optical fibers 11 are assembled; and a first and a second cylindrical films 12, 13 which are longitudinally attached in order in the longitudinal direction of the cable core 11a to cover a circumference of the cable core 11a, have width of 70% or larger, and smaller than 100%, of the length of the circumference of the cable core 11a, and are composed of a thermoplastic resin: an aperture 12x of the first film 12 being located within the second film 13. |
