JP2005070213A5

JP2005070213A5 -

Info

Publication number: JP2005070213A5
Application number: JP2003297291A
Authority: JP
Filing date: 2003-08-21
Publication date: 2006-10-05

Description

本発明のマルチコアプラスチック光ファイバは、ポリメタクリル酸メチルまたはメタクリル酸メチルと１種類以上のビニル系単量体との共重合体からなるコアのみからなる芯繊維または該コアと該コアの外周に配置された少なくとも一層のクラッドを有する芯繊維の少なくとも７本を一纏めにしたマルチコアプラスチック光ファイバであって、最外層のクラッドを構成するクラッド材が、テトラフルオロエチレンと下記一般式（I）
ＣＦ₂＝ＣＦ−（ＯＣＦ₂ＣＦ（ＣＦ₃））_aＯ-Ｒf₂ （I）
（式中、Ｒf₂は炭素原子数が１〜８個のアルキル基、フルオロアルキル基、アルコキシルアルキル基またはフルオロアルコキシルアルキル基を示し、ａは０〜３の整数である。）
で表されるパーフルオロビニル化合物の共重合体であり、当該共重合体を構成する単量体単位の合計を１００質量％としたとき、当該共重合体がテトラフルオロエチレン単位４０〜９０質量％、パーフルオロビニル化合物単位１０〜６０質量％を含むことを特徴とする。 The multi-core plastic optical fiber of the present invention is arranged on a core fiber composed of only a core made of polymethyl methacrylate or a copolymer of methyl methacrylate and one or more kinds of vinyl monomers, or disposed on the outer periphery of the core and the core. A multi-core plastic optical fiber in which at least seven core fibers each having at least one clad are collected, and the clad material constituting the outermost clad is tetrafluoroethylene and the following general formula (I)
_{_{CF 2 = CF- (OCF 2 CF}} (CF 3)) a O-Rf 2 (I)
(Wherein, Rf ₂ represents a 1-8 alkyl group, fluoroalkyl group, alkoxyl alkyl group or a fluoroalkyl alkoxyl group carbon atoms, a is an integer of 0-3.)
In Ri copolymer der perfluoro vinyl compound represented, when the total of the monomer units constituting the copolymer is 100 mass%, the copolymer of tetrafluoroethylene units 40 to 90 weight %, characterized in that it comprises 10 to 60 wt% perfluoro vinyl compound units.

Claims

A core fiber having only a core made of polymethyl methacrylate or a copolymer of methyl methacrylate and one or more kinds of vinyl monomers, or a core having at least one clad disposed on the outer periphery of the core and the core A multi-core plastic optical fiber in which at least seven fibers are bundled together,
The clad material constituting the outermost clad is
Tetrafluoroethylene and the following general formula (I)
_{_{CF 2 = CF- (OCF 2 CF}} (CF 3)) a O-Rf 2 (I)
(Wherein, Rf ₂ represents a 1-8 alkyl group, fluoroalkyl group, alkoxyl alkyl group or a fluoroalkyl alkoxyl group carbon atoms, a is an integer of 0-3.)
In Ri copolymer der perfluoro vinyl compound represented, when the total of the monomer units constituting the copolymer is 100 mass%, the copolymer of tetrafluoroethylene units 40 to 90 weight %, A multi-core plastic optical fiber comprising 10 to 60% by mass of a perfluorovinyl compound unit.

The clad consists of two layers laminated in the order of a first clad on the outer circumference of the core and an outermost clad on the outer circumference of the first clad,
The refractive index of the core material constituting the core is n ₁ , the refractive index of the first cladding material constituting the first cladding is n ₂ , and the refractive index of the outermost cladding material constituting the outermost cladding is n. ₃ , the first cladding material and the outermost cladding material are represented by the following relational expression (1)
n ₁ > n ₂ > n ₃ (1)
The multi-core plastic optical fiber according to claim 1 , wherein:

The first cladding material is
The following general formula (VI)
_{CH 2 = CX-COO (CH} 2) m (CF 2) n Y (VI)
(In the formula, X represents a hydrogen atom or a methyl group, Y represents a hydrogen atom or a fluorine atom, m represents 1 or 2, and n represents an integer of 1 to 13.)
A copolymer of a fluoroalkyl (meth) acrylate represented by the formula (1) and another copolymerizable monomer, and when the total of these monomer units is 100% by mass, the fluoroalkyl (meth) acrylate units 15-90 wt% consists of a copolymer containing 10 to 85 wt% other copolymerizable monomer units, and, according to claim 2 having a refractive index of 1.39 to 1.475 Multi-core plastic optical fiber.

The billing to the outer periphery of the cladding of the outermost layer of the multi-core plastic optical fiber according to any one of claim 1 to 3, fluorine 59 wt% or more comprising a protective layer made of a fluorine-based resin containing multi-core plastic optical fiber.

A multi-core plastic optical fiber cable in which at least one coating layer made of a thermoplastic resin is provided on the outer periphery of the multi-core plastic optical fiber according to any one of claims 1 to 4 .