Patent ID: 8422844

Claim:
A plastic optical fiber cable comprising: a bare plastic optical fiber comprising a core and a clad layer formed around the core, the clad layer being formed of one or plural layers; and a coating layer around the bare plastic optical fiber, wherein the core comprises polymethyl methacrylate or a copolymer containing a methyl methacrylate unit; the clad layer comprises a layer comprising a fluorine-containing olefin resin comprising a tetrafluoroethylene unit in at least an outermost layer of the clad layer, the fluorine-containing olefin resin having a heat of crystal fusion of 40 mJ/mg or less as measured using differential scanning calorimetry (DSC); the coating layer comprises a light-shielding coating layer, a first functional coating layer (C) and a second functional coating layer (D), the light-shielding layer is present on an opposite side from the bare plastic optical fiber, the first functional coating layer (C) is present on the light-shielding layer, and the second functional coating layer (D) is present on the first functional coating layer (C); the light-shielding coating layer comprises a resin composition comprising at least one nylon resin of nylon 11 and nylon 12, a total content of a monomer and an oligomer of the nylon resin is 1.5% by mass or less; one of the first functional coating layer (C) and the second functional coating layer (D) comprises a first resin composition (I) and the other comprises a second resin composition (II); the first resin composition (I) comprises a polybutylene terephthalate resin or an ethylene-vinyl alcohol copolymer; the second resin composition (II) comprises a nylon resin composition having a crystalline melting point in a range of 240° C. or more and 280° C. or less as measured using differential scanning calorimetry (DSC), and an oxygen transmission rate P (cm 3 ·cm/(cm 2 ·sec·Pa)) as measured employing a method defined in ISO14663-2:1999 (Annex C) at a temperature T (K), said P satisfying the following general formula (1): P< 8×10 −2 ×exp(−560 /T ) (1), and the nylon resin composition is colorless or colored with an inorganic pigment; when the first functional coating layer (C) comprises the resin composition (I) and the second functional coating layer (D) comprises the resin composition (II), the thickness c (μm) of the first functional coating layer (C) and the thickness d (μm) of the second functional coating layer (D) satisfy the following general formula (2): 0.39 ≦c /( c+d )≦0.9 (2); when the first functional coating layer (C) comprises the resin composition (II) and the second functional coating layer (D) comprises the resin composition (I), the thickness c (μm) of the first functional coating layer (C) and the thickness d (μm) of the second functional coating layer (D) satisfy the following general formula (3): 0.15 ≦c /( c+d )≦0.7 (3); a total thickness of the coating layer is 500 μm or more and 660 μm or less; and a thickness of the light-shielding coating layer is 200 μm or more and 350 μm or less.