JP2005234135A5 - - Google Patents

Claims (4)

A core and a clad having a two-layer structure in which the first clad and the second clad are laminated in this order on the outer periphery of the core;
The core is made of polymethyl methacrylate or a copolymer of one or more vinyl monomer units and methyl methacrylate units,
The first cladding has the following general formula (I)

<Chemical formula 1>
_{CH 2 = CX-COO (CH} 2) m -R 1 f (I)
(In the formula, X represents a hydrogen atom, a fluorine atom, or a methyl group, R ¹ _f represents a (fluoro) alkyl group having 1 to 12 carbon atoms, and m represents an integer of 1 or 2.)

In the unit (A) 15 to 90 wt% of the fluoroalkyl (meth) acrylate represented, made from the other copolymerizable monomer unit (B) 10 to 85 wt%, differential scanning calorimetry (DSC ) And a glass transition temperature of 90 ° C. or higher, and having a refractive index at 25 ° C. measured by an Abbe refractometer in the range of 1.39 to 1.475,
The plastic optical fiber, wherein the second clad is made of a fluorine-containing olefin resin containing at least a tetrafluoroethylene unit and having a crystal melting heat of 40 mJ / mg or less in differential scanning calorimetry (DSC). The plastic optical fiber strand according to claim 1, wherein the unit (A) of the fluoroalkyl (meth) acrylate is hexafluoroneopentyl (meth) acrylate. A plastic optical fiber cable obtained by coating the outer periphery of the plastic optical fiber according to claim 1 or 2 with a coating layer made of a polyamide-based resin composition. The plastic optical fiber cable with a connector terminal which provided the connector terminal at the terminal of the plastic optical fiber cable of Claim 3 .