Optical fiber cable
An optical fiber cable comprises a plurality of optical fibers, tensile strength fibers that accommodate the plurality of optical fibers, and a sheath formed with a thermoplastic resin and covering the tensile strength resin. In this optical fiber cable, when a Young's modulus of the sheath at 0° C. is E [MPa], a cross-sectional area of the optical fiber cable is S [mm 2 ] and an inner diameter of the sheath of the optical fiber cable is Di [mm], ES (0° C.) [N] which is the product of the Young's modulus E at 0° C. and the cross-sectional area S, and the inner diameter Di [mm] satisfy: ES ( 0 ° C . ) Di ≤ 600 ( 1 )
1. An optical fiber cable comprising:
a plurality of optical fibers;
tensile strength fibers that accommodate the plurality of optical fibers; and
a sheath formed with a thermoplastic resin and covering the tensile strength fibers,
wherein, when a Young's modulus of the sheath at 0° C. is E [MPa], a cross-sectional area of the optical fiber cable is S [mm 2 ], and an inner diameter of the sheath of the optical fiber cable is Di [mm], ES (0° C.) [N] which is a product of the Young's modulus E at 0° C. and the cross-sectional area S, and the inner diameter Di [mm] satisfy:
ES
(
0
°
C
.
)
Di
≤
600.
(
1
)
2. The optical fiber cable according to claim 1 , wherein, when an outer diameter of the optical fiber cable is Do [mm], the outer diameter Do and the inner diameter Di satisfy:
1.5
≤
Do
Di
≤
3.0
.
(
2
)
3. The optical fiber cable according to claim 1 , wherein an outer diameter Do of the optical fiber cable is 2.5 mm or larger and 4.5 mm or smaller.
4. The optical fiber cable according to claim 1 , wherein, when a moment of inertia of area of the optical fiber cable is I [mm 4 ], flexural rigidity EI (0° C.) [N·mm 2 ] which is a product of the Young's modulus E at 0° C. and the moment of inertia of area I satisfies:
EI (0° C.)≦1200 (3).
5. The optical fiber cable according to claim 1 , wherein
the plurality of optical fibers are disposed within the optical fiber cable in a form of a ribbon optical fiber, and,
when a width of the ribbon optical fiber is W [mm] and a thickness of the ribbon optical fiber is T [mm], the width W and the thickness T of the ribbon optical fiber and the inner diameter Di of the optical fiber cable satisfy:
0.60
≤
Di
2
-
W
2
-
T
Di
.
(
4
)
6. The optical fiber cable according to claim 1 , wherein at least one optical fiber among the plurality of optical fibers comprises:
a portion including glass; and
a non-removable resin layer surrounding the portion including glass, and
a glass diameter which is an outer diameter of the portion including glass is 100 μm or less, and an outer diameter of the non-removable resin layer is 140 μm or less.