JPS60222808A - Plastic optical fiber - Google Patents
Plastic optical fiberInfo
- Publication number
- JPS60222808A JPS60222808A JP59079187A JP7918784A JPS60222808A JP S60222808 A JPS60222808 A JP S60222808A JP 59079187 A JP59079187 A JP 59079187A JP 7918784 A JP7918784 A JP 7918784A JP S60222808 A JPS60222808 A JP S60222808A
- Authority
- JP
- Japan
- Prior art keywords
- pof
- ethyl acrylate
- ethylene
- optical fiber
- coating layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013308 plastic optical fiber Substances 0.000 title claims abstract description 48
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims abstract description 9
- 239000011247 coating layer Substances 0.000 claims description 37
- 239000010410 layer Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 230000008602 contraction Effects 0.000 abstract description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 4
- 239000004926 polymethyl methacrylate Substances 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract 3
- 239000013307 optical fiber Substances 0.000 abstract 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000013309 porous organic framework Substances 0.000 description 40
- 229920001577 copolymer Polymers 0.000 description 18
- 239000011347 resin Substances 0.000 description 15
- 229920005989 resin Polymers 0.000 description 15
- 238000005253 cladding Methods 0.000 description 8
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 8
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- -1 fluorinated alkyl methacrylate Chemical compound 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 4
- 238000007765 extrusion coating Methods 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical class C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- LTYMSROWYAPPGB-UHFFFAOYSA-N diphenyl sulfide Chemical class C=1C=CC=CC=1SC1=CC=CC=C1 LTYMSROWYAPPGB-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- QCTJRYGLPAFRMS-UHFFFAOYSA-N prop-2-enoic acid;1,3,5-triazine-2,4,6-triamine Chemical compound OC(=O)C=C.NC1=NC(N)=NC(N)=N1 QCTJRYGLPAFRMS-UHFFFAOYSA-N 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02033—Core or cladding made from organic material, e.g. polymeric material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
この発明は、耐湿熱性が良好なプラスチック光ファイバ
に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a plastic optical fiber having good moisture and heat resistance.
従来技術とその欠点
プラスチック光ファイバ（以下、ＰＯＦと略称する。）
は、通常コアがポリメチルメタアクリレートを主成分と
したポリマーから、ま・たクラッドがフッ化ビニリデン
・テトラフロロエチレン共重合体やフッ化アルキルメタ
アクリレートを主成分としたポリマーから構成されてい
る。そして、このようなＰＯＦは、コアをなすポリメチ
ルメタアクリレートが元来折れやすいため、折れにくく
するために製造時、その長さ方向に延伸されている〇こ
のため、この種のＰＯＦは１００〜１２０℃に加熱され
ると、収縮を始め、その長さが約５０％まで収縮してし
まう性質をもってｈる。また、とのＰＯＦを、例えば７
０〜８０℃、８０〜１００％ＲＨ程度の高温多湿下に置
くと収縮し、伝送損失が増加する欠点があった。Prior art and its disadvantages Plastic optical fiber (hereinafter abbreviated as POF)
Generally, the core is composed of a polymer mainly composed of polymethyl methacrylate, and the cladding is composed of a polymer mainly composed of vinylidene fluoride/tetrafluoroethylene copolymer or fluorinated alkyl methacrylate. Since the polymethyl methacrylate that forms the core of this kind of POF is inherently prone to breakage, it is stretched in the length direction during manufacturing to make it less likely to break.For this reason, this type of POF is When heated to 120°C, it begins to shrink and its length shrinks by about 50%. Also, the POF with, for example 7
When placed under high temperature and high humidity conditions of 0 to 80° C. and 80 to 100% RH, it shrinks and has the drawback of increasing transmission loss.
発明の目的
この発明は上記事情に鑑みてなされたもので、高温多湿
下に置れても、伝送特性が低下することのないＰＯＦを
提供することを目的とするものである。Purpose of the Invention The present invention was made in view of the above circumstances, and an object thereof is to provide a POF whose transmission characteristics do not deteriorate even when placed under high temperature and high humidity conditions.
発明の構成
この発明のＰＯＦは、ＰＯＦ素線上に１層以上の被覆層
が形成され、これら被覆層のうちの最外層がエチレン・
エチルアクリレート共重合体よりなるものである。Structure of the Invention In the POF of the present invention, one or more coating layers are formed on the POF wire, and the outermost layer of these coating layers is made of ethylene.
It is made of ethyl acrylate copolymer.
発明の具体的構成とその作用
第１図はこの発明のＰＯＦの一例を示すもので、図中符
号１はＰＯＦ素線である。このＰＯＦ素線１は、コア１
ａとクラッド１ｂとからなり、素線製造時に延伸が施さ
れたものである。そして、とのＰＯＦ素線１上には被覆
層２が設けられている。Detailed structure of the invention and its operation FIG. 1 shows an example of the POF of the invention, and reference numeral 1 in the figure is a POF wire. This POF wire 1 has a core 1
It consists of a cladding 1b and a cladding 1b, and is drawn during production of the wire. A coating layer 2 is provided on the POF wire 1.
この被覆層２は、エチレン・エチルアクリレート共重合
体より構成された、膜厚０１〜１鴎程度のものである。This coating layer 2 is made of ethylene/ethyl acrylate copolymer and has a thickness of about 0.1 to 1.0 mm.
ここに用いられるエチレン・エチルアクリレート共重合
体は、共重合体成分の土チルアクリレートの含有率が９
〜２２ｗｔ％の範囲のものが好ましく用いられる。エチ
ルアクリレートの含有率が９ｗｔ％未満では、この被覆
層２とＰＯＦ素線１のクラッドｌｂとの密着性が低く、
素線１の収縮を十分抑えることができず、しかもエチレ
ン・エチルアクリレート共重合体の溶融温度が高くなっ
て、被覆層１の形成時ＰＯＦ素線１が高温状態に置かれ
るために、収縮が生じ、コア１ａとクラッド１ｂとの界
面に微小な屈曲が生じ、伝送損失が増加して不都合を来
す。また、含有率が２２ｗｔ％を越えると、耐湿熱性向
上効果は得られるもののエチレン・エチルアクリレート
共重合体の熱軟化点が低くなシすぎて、実用に耐えなく
なる。さらに、この被覆層２の膜厚が［１１，、、未満
となると、膜厚が薄すぎてＰＯＦ索線１の収縮力に対抗
し得えず、耐湿熱性が得られず、１＋ｉ’ｅ越えても耐
湿熱性向上効果の増大が頭打ちとなシ、不経済でもある
。The ethylene/ethyl acrylate copolymer used here has a content of ethyl acrylate, a copolymer component, of 9.
A content in the range of 22 wt% is preferably used. When the content of ethyl acrylate is less than 9 wt%, the adhesion between the coating layer 2 and the cladding lb of the POF wire 1 is low.
The shrinkage of the wire 1 cannot be sufficiently suppressed, and the melting temperature of the ethylene-ethyl acrylate copolymer becomes high, and the POF wire 1 is placed in a high temperature state during the formation of the coating layer 1, resulting in shrinkage. This causes a slight bend at the interface between the core 1a and the cladding 1b, which increases transmission loss and causes a disadvantage. On the other hand, if the content exceeds 22 wt%, although the effect of improving heat and humidity resistance can be obtained, the thermal softening point of the ethylene/ethyl acrylate copolymer is too low to be suitable for practical use. Furthermore, if the thickness of the coating layer 2 is less than [11,..., the thickness is too thin to resist the contractile force of the POF cable 1, and moist heat resistance cannot be obtained, and the thickness exceeds 1+i'e. However, the increase in the effect of improving heat and humidity resistance reaches a plateau, and it is also uneconomical.
この被覆層２の形成はクロスへラドダイを装備した押出
機によって行われる。押出温度は１２０〜１５０°Ｃ程
度とされる。押出被覆時の熱による素線１の収縮を防止
するため、ＰＯＦ素線１の送）出し速度よシも押出被覆
後のＰＯＦの巻き取シ速度を大きく、素線１に常時引張
力を加えるようにすることが好ましく、また、素線１の
巳アクラッド界面の微小な屈曲を防止するため、素線ｌ
の通過するダイのマンドレル部分を水冷するなどの処置
ｔ−ｍすることも好ましい。This coating layer 2 is formed using an extruder equipped with a cross-layer Rad die. The extrusion temperature is about 120 to 150°C. In order to prevent the wire 1 from shrinking due to heat during extrusion coating, the feeding speed of the POF wire 1 is increased as well as the winding speed of the POF after extrusion coating, and a tensile force is constantly applied to the wire 1. It is preferable to
It is also preferable to carry out treatment such as cooling the mandrel portion of the die through which it passes with water.
このようなＰＯＦにあっては、ＰＯＦ素線１のクラッド
ｌｂと被層層２のエチレン・野ルアクリレート共重合体
との密着性がよく、かつエチレン・エチルアクリレート
共重合体自体の線膨張係数が１．７〜Ｚ６Ｘ１０″−４
／℃と高イノテ、と１７）ＰＯＦを湿熱条件下に置いた
場合、ＰＯＦ素線１が収縮しようとするが、素線１にエ
チレン・エチルアクリレート共重合体よりなる被覆層２
が密着しているので、素線１が収縮しようとする力がエ
チレン・エチルアクリレート共重合体の熱膨張力によっ
て打ち消され、ＰＯＦ素線１の収縮が有効に迎えられ、
よって伝送損失の増加が防止できる。また、素線１の収
縮が防止されるので、コアｌａとクラッド１ｂとの界面
のゆらぎが生じることがなく、このゆらぎに起因する伝
送損失増加も防止される。In such a POF, the adhesion between the cladding lb of the POF wire 1 and the ethylene/field acrylate copolymer of the coating layer 2 is good, and the linear expansion coefficient of the ethylene/ethyl acrylate copolymer itself is good. is 1.7~Z6X10″-4
17) When the POF is placed under moist heat conditions, the POF strand 1 tends to shrink, but the coating layer 2 made of ethylene/ethyl acrylate copolymer on the strand 1 tends to shrink.
are in close contact with each other, the force that causes the wire 1 to shrink is canceled out by the thermal expansion force of the ethylene-ethyl acrylate copolymer, and the contraction of the POF wire 1 is effectively met.
Therefore, an increase in transmission loss can be prevented. Further, since shrinkage of the wire 1 is prevented, fluctuations at the interface between the core la and the cladding 1b do not occur, and an increase in transmission loss due to this fluctuation is also prevented.
さらに、被覆層２は押出被覆法によって形成できるので
、能率よく、安価にこのＰＯＦを得ることが可能となる
。Furthermore, since the coating layer 2 can be formed by an extrusion coating method, this POF can be obtained efficiently and at low cost.
発明の他の具体例
第２図は、この発明のＰＯＦの他の例を示すものである
。この例のＰＯＦは、ＰＯＦ素線１上に紫外線硬化樹脂
よシなる第１被僅層３が形成され、この＠１被覆層３上
にエチレン・エチルアクリレート共重合体よシなる第２
被覆層４が設けられてなるものである。第１被覆層３を
なす紫外線硬化樹脂は、不飽和樹脂、ビニル化合物およ
び光重合開始剤を主な成分とする紫外線硬化性樹脂液を
素線１に塗布し、紫外線を照射して硬化せしめたもので
ある。上記不飽和樹脂としては、樹脂分子の主鎖または
側鎖にラジカル重合性の二重結合を有する樹脂で、不飽
和ポリエステル系、エポキシアクリレート系、ウレタン
アクリレート系、ポリエステルアクリレート系、ポリエ
ーテルアクリレート系、アクリル系、油・脂肪酸系、不
飽和ポリブタジェン系、メラミンアクリレート系、長側
鎖ビニル化合物等が挙げられる。また、上記ビニル化合
物は、上記不飽和樹脂の架橋剤兼希釈剤として使用する
もので、不飽和基を１〜４個有するスチレンモノマーな
どのビニルモノマーが用いられる。Another Example of the Invention FIG. 2 shows another example of the POF of the invention. In the POF of this example, a first coating layer 3 made of ultraviolet curing resin is formed on the POF wire 1, and a second coating layer 3 made of ethylene-ethyl acrylate copolymer is formed on this @1 coating layer 3.
A covering layer 4 is provided. The ultraviolet curable resin constituting the first coating layer 3 is obtained by applying an ultraviolet curable resin liquid containing an unsaturated resin, a vinyl compound, and a photopolymerization initiator as main components to the wire 1, and curing it by irradiating it with ultraviolet rays. It is something. The above-mentioned unsaturated resin is a resin having a radically polymerizable double bond in the main chain or side chain of the resin molecule, such as unsaturated polyester, epoxy acrylate, urethane acrylate, polyester acrylate, polyether acrylate, Examples include acrylic type, oil/fatty acid type, unsaturated polybutadiene type, melamine acrylate type, and long side chain vinyl compound. The vinyl compound is used as a crosslinking agent and diluent for the unsaturated resin, and a vinyl monomer such as a styrene monomer having 1 to 4 unsaturated groups is used.
さらに、上記光重合開始剤としては、通常近紫外域（３
００〜４５０ｎｍ）で励起されてラジカルを発生させる
ものがよく、ベンゾイン系化合物、アゾ系、ジフェニル
スルフィド系、有機過酸化物系、有機色素系、鉄・フタ
ロシアニン系などが使用される。硬化用紫外線源として
は、蛍光ケミカルランプ、高圧水銀灯などが用いられる
。具体的には水銀灯を円周上に複数本配置し、この内部
に上記紫外線硬化性樹脂を所定量塗布し九Ｉ’ＯＦ素線
１を所定の線速で走行せしめ、数秒以内で照射して硬化
させる。また、この第１被覆層３の膜厚は、５〜２００
ＩＬＩＲの範囲とされる。Furthermore, the above photopolymerization initiator is usually used in the near ultraviolet region (3
00 to 450 nm) to generate radicals, and examples include benzoin compounds, azo compounds, diphenyl sulfide compounds, organic peroxide compounds, organic dyes, and iron/phthalocyanine compounds. As a curing ultraviolet light source, a fluorescent chemical lamp, a high pressure mercury lamp, etc. are used. Specifically, a plurality of mercury lamps are arranged around the circumference, a predetermined amount of the above-mentioned ultraviolet curable resin is applied inside the lamp, and the nine I'OF strands 1 are run at a predetermined linear speed to irradiate the resin within a few seconds. Let it harden. Moreover, the film thickness of this first coating layer 3 is 5 to 200 mm.
It is considered to be within the ILIR range.
この例のＰＯＦでは、第１被覆層３をなす紫外線硬化樹
脂が適当な硬度、強度を保持し、ＰＯＦ素線１に密着し
ているため、湿熱下に置かれたとき、再１被覆層３がテ
ンションメンバのように働き、素線１の収縮が抑えられ
る。また、紫外線硬化樹脂よりなる第１融覆層３は、エ
チレン・エチルアクリレート共重合体よシなる８ｇ２被
榎層・４に強力に密着するため、エチレン・エチルアク
リレート共重合体の熱収縮力が紫外線硬化樹脂を介して
素線ＩＶｃ作用し、同様に素線１の収縮を抑えるように
機能する。このため、この例のＰＯＦは耐湿熱性に極め
て富んだものとなる。In the POF of this example, the ultraviolet curable resin forming the first coating layer 3 maintains appropriate hardness and strength and is in close contact with the POF wire 1, so when placed under moist heat, the first coating layer 3 acts like a tension member, and the contraction of the strand 1 is suppressed. In addition, since the first melting layer 3 made of ultraviolet curable resin strongly adheres to the 8g2 coated layer 4 made of ethylene/ethyl acrylate copolymer, the heat shrinkage force of the ethylene/ethyl acrylate copolymer is The strand IVc acts on the strand IVc through the ultraviolet curing resin, and similarly functions to suppress the shrinkage of the strand 1. Therefore, the POF of this example has extremely high moisture and heat resistance.
また、第３図（ａ）〜（、ｌ）は、この発明のＰＯＦの
応用例を示すものである。第３図（ａ）に示した例は、
７本のＰＯＦ素線１・・・を撚シ合せたうえ、この撚線
全体を被うようにエチレン・エチルアクリレート共重合
体よりなる被覆層５を設けたケーブルである。また、第
５図（＋、）に示した例は、５本のＩ’ＯＦ素線１・・
・を平行に並べ、これらを覆うようにエチレン・エチル
アクリレート共重合体よりなる被覆層５を設けて平行三
芯コードとしたものである。Further, FIGS. 3(a) to 3(l) show examples of application of the POF of the present invention. The example shown in Figure 3(a) is
This is a cable in which seven POF wires 1 are twisted together, and a coating layer 5 made of ethylene/ethyl acrylate copolymer is provided to cover the entire twisted wires. In addition, the example shown in FIG. 5 (+,) has five I'OF strands 1...
are arranged in parallel, and a coating layer 5 made of ethylene/ethyl acrylate copolymer is provided to cover them to form a parallel three-core cord.
第３図（０）の例は、鋼撚線やＦＲＰコードなどのテン
ションメンバ６の周囲に６本の素線１・・・を撚り合セ
、この上にエチレン・エチルアクリレート共重合体より
なる被覆層５を形成してケーブルとしたものである。さ
らに、第３図（ｄ）の例は、テンションメンバ６の両側
方に１本づつＰＯＦ素線１゜ｌを並設し、これらをエチ
レン・エチルアクリレート共重合体よシなる被覆層５ｔ
−設けたものである。In the example shown in Fig. 3 (0), six strands 1... are twisted together around a tension member 6 such as steel stranded wire or FRP cord, and a layer of ethylene-ethyl acrylate copolymer is placed on top of the strands 1... A cable is formed by forming a coating layer 5. Furthermore, in the example shown in FIG. 3(d), 1°l of POF wires are arranged in parallel on both sides of the tension member 6, and these are coated with a coating layer 5t made of ethylene-ethyl acrylate copolymer.
-It is set up.
これらのＰＯＦＫあっても、エチレン・エチルアクリレ
ート共重合体よりなる被覆層５があるので、湿熱下に置
かれても内部のＰＯＦ素線１・・・の収縮が有効に防止
され、伝送損失の増加を来たすことがない。Even with these POFKs, the coating layer 5 made of ethylene/ethyl acrylate copolymer effectively prevents the internal POF wires 1 from shrinking even when placed under moist heat, reducing transmission loss. There will be no increase.
実験例
以下、実験例を示して、本発明のＰＯＦの作用効果を明
確にする。Experimental Examples Experimental examples will be shown below to clarify the effects of the POF of the present invention.
〔実験例１〕
ＰＯＦ素線として、コアがポリメチルメタアクリレート
系ポリマーで、クラッドがフッ化ナルキルメタアクリレ
ート系ポリマーで構成され、波長０．６６μｍでの伝送
損失が２６５６Ｂ／ｌａｎである径１．０ ｙの素線（
三菱レイヨン製、エスカエクストラＥＫ−４０）を用意
した。この素線に押出被覆法によって、エチルアクリレ
ートの含有率の異なる５種のエチレン・エチルアクリレ
ート共重合体よりなる被覆層を形成した。押出温度は１
４０°Ｃとし、押出機のダイス径”ｋ ２．Ｏｔｓｒｔ
ｒとし、被覆層の厚みはＱ、６ｍ１ｎとした。[Experimental Example 1] A POF wire with a diameter of 1 whose core is made of polymethyl methacrylate polymer, whose cladding is made of fluorinated nalkyl methacrylate polymer, and whose transmission loss at a wavelength of 0.66 μm is 2656 B/lan. .0 y strand (
Esca Extra EK-40 (manufactured by Mitsubishi Rayon) was prepared. A coating layer consisting of five types of ethylene/ethyl acrylate copolymers having different ethyl acrylate contents was formed on this wire by an extrusion coating method. Extrusion temperature is 1
40°C, extruder die diameter “k 2.Otsrt
r, and the thickness of the coating layer was Q, 6 m1n.
得られ九ＰＯＦの伝送損失を同波長で測定したのち、８
０℃、９５％ＲＨで６０日間湿熱処理を行った。ついで
、湿熱処理に伴う伝送損失の変化および収縮率をめた。After measuring the transmission loss of the nine POFs obtained at the same wavelength,
Moist heat treatment was performed at 0° C. and 95% RH for 60 days. Next, changes in transmission loss and shrinkage rate due to moist heat treatment were measured.
比較のため、被覆層を形成しない素線およびエチレン・
酢酸ビニル共重合体、ポリエステルエラストマー、低密
度ポリエチレンよりなる被覆層を形成したものについて
も同様の湿熱処理を行い、同様の測定を行った。結果を
併せて第１表に示した。For comparison, strands with no coating layer and ethylene
The same heat-and-moisture treatment was also performed on the samples with coating layers made of vinyl acetate copolymer, polyester elastomer, and low-density polyethylene, and the same measurements were performed. The results are also shown in Table 1.
第１表の結果から明らかなよう忙、エチルアクリレート
含有量９〜２２ｗｔ％のエチレン・エチルアクリレート
共重合体よシなる被覆層を形成したものは、湿熱処理に
よっても伝送損失増加量が１０ａＢ／／ｉｉ前後であり
、収縮率も約＆５％と、ＥＶＡ、ＬＤＰＥ、ポリエステ
ルエラストマーよりなる被覆層を形成したものより低く
なっており、耐湿熱性に優れることがわかる。また、エ
チルアクリレート含有量が例えば２５％のものでは、伝
送損失増加を十分抑えることができるものの一熱軟化点
が４０°Ｃと低くなり、この温度以上でこのＰＯＦを使
用するには不向きとなる。また、＋７％のものでは、熱
軟化点は７０℃と高く、耐熱性は十分であり、伝送損失
増加量が２２ａＢ／７Ｉ２＋と若干大きくなるが、増加
率から見ると、ＰＯＦ素線に対して８〜９％増加してい
るだけであり、用途によっては十分使用できるものであ
る。As is clear from the results in Table 1, when a coating layer made of ethylene/ethyl acrylate copolymer with an ethyl acrylate content of 9 to 22 wt% was formed, the transmission loss increased by 10 aB even after moist heat treatment. It can be seen that the shrinkage rate is about &5%, which is lower than those formed with a covering layer made of EVA, LDPE, or polyester elastomer, and has excellent heat and humidity resistance. In addition, if the ethyl acrylate content is, for example, 25%, the increase in transmission loss can be sufficiently suppressed, but the one-heat softening point is as low as 40°C, making it unsuitable for use at temperatures above this temperature. . In addition, +7% has a high thermal softening point of 70°C and has sufficient heat resistance, and the increase in transmission loss is slightly large at 22aB/7I2+, but in terms of the increase rate, it is compared to the POF wire. The increase is only 8 to 9%, which is sufficient for some uses.
〔実験例２〕
実験例１で使用したＰＯＦ素線に、３種の紫外線硬化樹
脂よシなる皮膜厚み２０μｍの第１被覆層を形成し、つ
いでエチルアクリレート含有量１Ｂｖｔ％のエチレン・
エチルアクリレート共重合体よりなる皮膜厚み０．６ｍ
ｍの第２被覆層を形成し、同様の耐湿熱性を検討した。[Experimental Example 2] A first coating layer with a thickness of 20 μm made of three kinds of ultraviolet curing resins was formed on the POF wire used in Experimental Example 1, and then an ethylene coating layer with a ethyl acrylate content of 1 Bvt% was formed.
Film thickness: 0.6m made of ethyl acrylate copolymer
A second coating layer of m was formed, and similar moisture and heat resistance was examined.
結果を第２表に示す。The results are shown in Table 2.
第２表
第２表の結果から明らかなように、紫外線硬化樹脂より
なる第１被覆層を併せて形成したものは、極めて高い耐
湿熱性を有することがわかる。As is clear from the results shown in Table 2, it can be seen that the product in which the first coating layer made of the ultraviolet curable resin was also formed had extremely high heat and humidity resistance.
ｉｑｃと立木
本発明のＰＯＦは、ＰＯＦ素線上く形成される被覆層の
うち、最外層をエチレン・エチルアクリレート共重合体
で構成したものであるので、高温多湿下に置かれても素
線の収縮が確実に抑制され、伝送損失が増加することが
なく、耐湿熱性が良好である。iqc and standing trees In the POF of the present invention, the outermost layer of the coating layer formed on the POF wire is composed of ethylene-ethyl acrylate copolymer, so the wire remains stable even when placed under high temperature and high humidity. Shrinkage is reliably suppressed, transmission loss does not increase, and heat and humidity resistance is good.
第１図および第２図は、いずれもこの発明のプラスチッ
ク光ファイバの例を示す概略断面図、第３図（ａ）〜（
（転）はいずれもこの発明のプラスチック光ファイバの
応用例を示す概略断面図、第４図は、実験例で用いた試
料片を示す概略斜視図である。
１・・・・・ ＰＯＦ素線、２・・・・・被覆層、４・
・・・・第２被覆層、５・・・・・被覆層。
第１図
第２図
第３図
第４図1 and 2 are schematic cross-sectional views showing examples of the plastic optical fiber of the present invention, and FIGS.
4 is a schematic cross-sectional view showing an application example of the plastic optical fiber of the present invention, and FIG. 4 is a schematic perspective view showing a sample piece used in an experimental example. 1...POF wire, 2...covering layer, 4...
...Second coating layer, 5...Coating layer. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
上の被覆層が形成され、この被覆層のうちの最外層がエ
チレン・エチルアクリレート共重合体よシなることを特
徴とするプラスチック光ファイバ。A plastic optical fiber characterized in that one or more coating layers are formed on a stretched plastic optical fiber strand, and the outermost layer of the coating layers is made of ethylene-ethyl acrylate copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59079187A JPH0610692B2 (en) | 1984-04-19 | 1984-04-19 | Plastic fiber optic fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59079187A JPH0610692B2 (en) | 1984-04-19 | 1984-04-19 | Plastic fiber optic fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60222808A true JPS60222808A (en) | 1985-11-07 |
| JPH0610692B2 JPH0610692B2 (en) | 1994-02-09 |
Family
ID=13682969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59079187A Expired - Fee Related JPH0610692B2 (en) | 1984-04-19 | 1984-04-19 | Plastic fiber optic fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610692B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01114805A (en) * | 1987-10-28 | 1989-05-08 | Toray Ind Inc | Plastic optical fiber sheet |
| JP2006208651A (en) * | 2005-01-27 | 2006-08-10 | Fujikura Ltd | Coated plastic optical fiber ribbon |
| WO2013039218A1 (en) * | 2011-09-14 | 2013-03-21 | 三菱レイヨン株式会社 | Plastic optical fiber cable |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL220754B1 (en) | 2012-10-02 | 2015-12-31 | Telekomunikacja Polska Spółka Akcyjna | Coaxial optical fiber |
-
1984
- 1984-04-19 JP JP59079187A patent/JPH0610692B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01114805A (en) * | 1987-10-28 | 1989-05-08 | Toray Ind Inc | Plastic optical fiber sheet |
| JP2006208651A (en) * | 2005-01-27 | 2006-08-10 | Fujikura Ltd | Coated plastic optical fiber ribbon |
| WO2013039218A1 (en) * | 2011-09-14 | 2013-03-21 | 三菱レイヨン株式会社 | Plastic optical fiber cable |
| JPWO2013039218A1 (en) * | 2011-09-14 | 2015-03-26 | 三菱レイヨン株式会社 | Plastic optical fiber cable |
| US9075213B2 (en) | 2011-09-14 | 2015-07-07 | Mitsubishi Rayon Co., Ltd. | Plastic optical fiber cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0610692B2 (en) | 1994-02-09 |
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