Plastic optical fiber cable
View Patent ↗The invention provides a plastic optical fiber cable comprising a plastic optical fiber having a core/clad structure, a light blocking coating layer provided around the plastic optical fiber, and a protective coating layer provided between the outermost layer of the core/clad structure and the light blocking coating layer. The outermost layer of the core/clad structure is made of a fluorine-containing olefin polymer containing at least a tetrafluoroethylene unit, the crystal melting heat of the fluorine-containing olefin polymer being 59 mJ/mg or lower. The light blocking coating layer is made of a resin primarily containing a polyamide resin, the content of polyamide resin-derived monomers and oligomers being 1.5% by weight or lower.
1. A plastic optical fiber cable comprising:
A plastic optical fiber having a core-clad structure: and
A light blocking coating layer provided around the plastic optical fiber,
wherein the outermost layer of the core/clad structure is made of a fluorine-containing olefin polymer containing at least a tetrafluoroethylene unit, the crystal melting heat of the fluorine-containing olefin polymer being 59 mJ/mg or lower;
the light blocking coating layer is made of a resin primarily containing a polyamide resin, the total content of polyamide resin-derived monomer compounds and oligomer compounds being 1.5% by weight or lower; and
the plastic optical fiber cable further comprises a protective coating layer provided between the outermost layer of the core/clad structure and the light blocking coating layer.
2. The plastic optical fiber cable according to claim 1 , wherein the resin that forms the light blocking coating layer contains a terminal amino group, the content of which is 100 μeq/g or lower.
3. The plastic optical fiber cable according to claim 1 , wherein the miscibility parameter (SP value) of the protective coating layer, SP 1 , and the miscibility parameter (SP value) of the monomers and oligomers contained in the polyamide resin that is the primary component of the light blocking coating layer, SP 2 , satisfy the following equation:
| SP 1− SP 2|≧0.2.
4. The plastic optical fiber cable according to claim 1 , wherein the protective coating layer is made of any of a resin containing a methyl (meth)acrylate unit, a resin primarily formed of a styrene unit, a polycarbonate resin, a resin primarily formed of a propylene unit, a resin primarily containing a ethylene-vinyl alcohol copolymer, a polybutylene terephthalate resin, and a polyacetal resin.
5. The plastic optical fiber cable according to claim 1 , wherein the protective coating layer is made of a resin containing 85 to 97% by weight of a vinylidene fluoride unit.
6. The plastic optical fiber cable according to claim 1 , wherein the protective coating layer is made of a resin containing a copolymer unit having at least one of an acid anhydride group, a carboxylic acid group, and a glycidyl group.