JPH01161208A - Optical fiber cord - Google Patents
Optical fiber cordInfo
- Publication number
- JPH01161208A JPH01161208A JP62320305A JP32030587A JPH01161208A JP H01161208 A JPH01161208 A JP H01161208A JP 62320305 A JP62320305 A JP 62320305A JP 32030587 A JP32030587 A JP 32030587A JP H01161208 A JPH01161208 A JP H01161208A
- Authority
- JP
- Japan
- Prior art keywords
- sheath
- tension member
- extrusion coating
- optical fiber
- shrinkage rate
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims description 26
- 238000007765 extrusion coating Methods 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- -1 polyparaphenylene Polymers 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 12
- 229920000265 Polyparaphenylene Polymers 0.000 claims description 6
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- MHSKRLJMQQNJNC-UHFFFAOYSA-N terephthalamide Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1 MHSKRLJMQQNJNC-UHFFFAOYSA-N 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 description 8
- AVRQALNKUQDGLO-UHFFFAOYSA-N benzene-1,4-dicarboxamide;phenoxybenzene Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1.C=1C=CC=CC=1OC1=CC=CC=C1 AVRQALNKUQDGLO-UHFFFAOYSA-N 0.000 description 4
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 4
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229920000271 Kevlar® Polymers 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- 229920000299 Nylon 12 Polymers 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004761 kevlar Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical compound FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
この発明は、例えば光ファイバウーブルの本体成端部か
ら機器に配線するためなどに用いられる光ファイバコー
ドに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical fiber cord used, for example, for wiring from the main body termination part of an optical fiber wobble to a device.
第１図は、このような光ファイバコードの一例を示すも
ので、図中符号１は光ファイバ心線である。この光ファ
イバ心線１は、コアおよびクラッドからなる光ファイバ
裸ＩＱ２上に変性シリコーンゴムなどからなる一次被覆
層、シリコーンゴムなどからなる緩衝層、テトラフルオ
ロエチレンーパ ゛−フロロアルキルビニルエーテル
共車合体く以下、ＰＦＡと表示する。）、ポリクロルト
リフルオロエチレン（以下、２０丁「Ｅと表示する。）
、テトラフルオロエチレン−へヤザフルオ口プ口ピレン
共重合体（以下、ＦＥＰと表示する。）、エヂレンーテ
トラフルオロエチレン共重合体、ポリフッ化ビニリデン
などのフッ素樹脂からなる二次被覆層を順次前して被覆
層３を形成してなるものである。この光ファイバ心線１
上には、ガラス繊維、カーボン１ｌｉｌｌ、アラミド繊
維などの高抗張力Ｍ＆紺を編組してなるテンションメン
バ４が設けられており、このテンションメンバ４上には
前記二次被覆層と同様のシース５が押出被覆法ににつで
設けられている。FIG. 1 shows an example of such an optical fiber cord, and reference numeral 1 in the figure indicates an optical fiber core. This optical fiber core 1 consists of a bare optical fiber IQ2 consisting of a core and a cladding, a primary coating layer made of modified silicone rubber, a buffer layer made of silicone rubber, etc., and a combination of tetrafluoroethylene and fluoroalkyl vinyl ether. Hereinafter, it will be referred to as PFA. ), polychlorotrifluoroethylene (hereinafter referred to as 20 "E")
A secondary coating layer consisting of a fluororesin such as , tetrafluoroethylene-heyazafluoropyrene copolymer (hereinafter referred to as FEP), ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, etc. is sequentially applied. The coating layer 3 is formed by doing this. This optical fiber core wire 1
A tension member 4 made of braided high tensile strength M&navy blue material such as glass fiber, carbon 1 liter, and aramid fiber is provided on the top, and on this tension member 4, a sheath 5 similar to the above-mentioned secondary coating layer is provided. It is used in extrusion coating method.
このような構造にすることによって、−６０℃〜＋２０
０℃の広い温度領域において使用可能とした構造となっ
ている。By having such a structure, -60°C to +20°C
It has a structure that allows it to be used in a wide temperature range of 0°C.
しかしながら、二次被覆層およびシース４に上記フッ素
樹脂を用いた場合、テンションメンバ４にアラミドＩＩ
Ｉ、Ｉｌｌの一種であるポリパラフェニレンテレフタラ
ミド（Ｐ Ｐ Ｔ Ａ 、デュポン社製ケブラー）を用
いると、シース４の押出被覆後においてテンションメン
バ４にうねり、曲がりなどが生じ、これによってファイ
バ裸線２がマイクロベンゾインクを生じ、伝送損失が増
加する問題点があった。However, when the above fluororesin is used for the secondary coating layer and the sheath 4, the tension member 4 is made of aramid II.
When polyparaphenylene terephthalamide (PPT A, Kevlar manufactured by DuPont), which is a type of I and Ill, is used, undulations and bends occur in the tension member 4 after extrusion coating of the sheath 4, which causes the fiber to become bare. There was a problem in that the line 2 generated microbenzo ink and increased transmission loss.
（問題点を解決するための手段）
この発明では、シースをなりプラスチックの押出被覆時
の成形収縮率と、テンションメンバをな？ｉ織繊維上記
押出被覆温度近傍での収縮率とがほぼ一致するテンショ
ンメンバとシースとの組合せを選択することをその問題
点の解決手段とした。(Means for Solving the Problems) In the present invention, the sheath is made of plastic, and the molding shrinkage rate and tension member during extrusion coating are determined. The solution to this problem was to select a combination of a tension member and a sheath whose shrinkage rates near the extrusion coating temperature of the i-woven fibers are approximately the same.
シースをなずプラスチックの押出被覆時の成形収縮率と
テンションメンバをなず繊維の上記押出被覆の際の温度
近傍での収縮率とをほぼ一致させることにより、シース
の押出被覆の際に生じるシースの成形収縮量とテンショ
ンメンバが加熱されることによる収縮量とがぽは一致し
、このためシースの押出被覆後においてもテンションメ
ンバにうねりや曲がりが生ずることがなくなる。The sheath produced during extrusion coating of the sheath can be reduced by almost matching the molding shrinkage rate during extrusion coating of the plastic without the sheath and the shrinkage rate near the temperature when extrusion coating the tension member with the fiber without the sheath. The amount of molding shrinkage and the amount of shrinkage due to heating of the tension member match, and therefore, even after the sheath is extruded and coated, the tension member does not undulate or bend.
第１図を利用して、この発明の光ファイバコードの一例
を説明する。An example of the optical fiber cord of the present invention will be explained with reference to FIG.
この例の光ファイバコードにあっては、光ファイバ心線
２の二次被覆層がＰＦＡ、ＰＣＴＦＥ。In the optical fiber cord of this example, the secondary coating layer of the optical fiber core 2 is PFA or PCTFE.
ＦＥＰなどの耐寒性、耐熱性に優れたフッ素樹脂からな
り、テンションメンバ４がアラミド繊維の一種であるポ
リパラフェニレン・３，４′ジフエニルエーテルデレフ
タラミドからなり、さらにシース５がＰＦＡ、ＰＣＴに
Ｆ、ＦＥＰのいずれか１種または２種以上のブレンド物
からなっている。The tension member 4 is made of polyparaphenylene/3,4' diphenyl ether dephthalamide, which is a type of aramid fiber, and the sheath 5 is made of PFA or PCT. F, FEP, or a blend of two or more thereof.
シース５をなすＰＦＡ、ＰＣＴＦＥ、ＦＥＰの押出被覆
の際の溶融温度は通常３２０〜３７０℃であり、この温
度でのポリパラフェニレン・３゜４′ジフエニルエーテ
ルテレフタラミドの体積収縮率は約２〜２，５％である
。また、ＰＦＡ、ＰＣＴＦＥ、ＦＥＰの成形収縮率は１
．５〜２．５％（体積比）である。よって、この組合せ
では両者の収縮量がほぼ一致し、テンションメンバ４の
ねじれ、曲がりが防止される。The melting temperature of the PFA, PCTFE, and FEP that make up the sheath 5 during extrusion coating is usually 320 to 370°C, and the volume shrinkage of polyparaphenylene/3°4' diphenyl ether terephthalamide at this temperature is approximately It is 2-2.5%. In addition, the molding shrinkage rate of PFA, PCTFE, and FEP is 1
．． It is 5 to 2.5% (volume ratio). Therefore, in this combination, the amount of contraction of both members is almost the same, and twisting and bending of the tension member 4 is prevented.
なお、この発明にお（プる成形収縮率とは、押出被覆時
の溶融樹脂単位重最当りの体積Ｖｍと被覆後の室温にお
ける樹脂単位重量当りの体積ＶＳとの比で表わされ、
成形収縮率、、Ｖｍ二ニーＭ−Ｌｘ １ｏ 。In addition, in this invention, the molding shrinkage rate is expressed as the ratio of the volume Vm per unit weight of molten resin at the time of extrusion coating to the volume VS per unit weight of resin at room temperature after coating. Contraction rate, , Vm two knee M−Lx 1o.
ｓ で算出される。s It is calculated by
また、この発明におけるシースをなすプラスチックの成
形収縮率とテンションメンバをなすｍＭの押出被覆温度
近傍での収縮率とがほぼ一致するとは、両者の収縮率の
差の絶対値が０．５％以下であることを意味する。In addition, in this invention, the molding shrinkage rate of the plastic forming the sheath and the shrinkage rate near the extrusion coating temperature of mmM forming the tension member are said to be approximately equal to each other, which means that the absolute value of the difference in shrinkage rate between the two is 0.5% or less. It means that.
上記実施例の光ファイバコードでは、−６０℃から＋２
００℃の広い温度領域での使用を考慮して、二次被覆層
およびシース５に温度特性の良好なＰＦＡ、ＦＥＰ、Ｐ
ＣＴＦＥを用いたが、通常の使用温度範囲であれば、シ
ース５にポリプロピレンを、二次被覆層にナイロン１２
を用いることができる。シース５をなすポリプロピレン
の押出被覆温度は、２００〜３００℃であり、その成形
収縮率は１．０〜２．２％である。一方、ポリパラフェ
ニレン・３，４′ジフエニルエーテルテレフタラミドの
２００〜３００℃での収縮率はＯ０５〜１．５％である
ので、シース５をなづポリプロピレンの押出被覆温度を
２５０℃前後どすれば両名がほぼ一致し、テンションメ
ンバ５としてポリペラフ１ニレン・３，４′ジフエニル
エーテルテレフタラミドを使用することができる。In the optical fiber cord of the above example, from -60℃ to +2℃
In consideration of use in a wide temperature range of 00°C, the secondary coating layer and sheath 5 are made of PFA, FEP, PFA with good temperature characteristics.
CTFE was used, but within the normal operating temperature range, polypropylene could be used for the sheath 5 and nylon 12 for the secondary coating layer.
can be used. The extrusion coating temperature of the polypropylene forming the sheath 5 is 200 to 300°C, and the molding shrinkage rate thereof is 1.0 to 2.2%. On the other hand, since the shrinkage rate of polyparaphenylene/3,4' diphenyl ether terephthalamide at 200 to 300°C is O05 to 1.5%, the extrusion coating temperature of polypropylene without sheath 5 is set to around 250°C. If both names are substantially the same, polyperaf 1 nylene 3,4' diphenyl ether terephthalamide can be used as the tension member 5.
その他、シースとなるプラスチックとしてポリエチレン
、ブイロン６、ナイロン１２、ポリ塩化ビニルなどを用
いた場合には、これらの押出被覆時の成形収縮率との差
が０．５％以下の収縮率を持つＩＮ、例えば強力ナイロ
ン繊維、ポリエステルｍ紐などを選択づ−ることができ
る。In addition, when polyethylene, Vuylon 6, nylon 12, polyvinyl chloride, etc. are used as the plastic for the sheath, it is necessary to use IN with a shrinkage rate that is less than 0.5% different from the molding shrinkage rate during extrusion coating. For example, strong nylon fiber, polyester m-string, etc. can be selected.
二次被覆層としてＦＥＰを用いた外径０．９ｍｍの光フ
ァイバ心線上に、テンションメンバとしてポリパラフェ
ニレン・３，４′ジフ工ニルエーテルテレノタラミド繊
Ｍ（帝人（株製、デクノーラＨＭ−５０）の４００デニ
ールのストランド６本を編組し、この上にシースとして
ＦＥＰを樹脂温度３６０℃で押出被覆し、仕上り外径１
．５ｍｍの光ファイバニ】−ドを製造しｌこ。ポリパラ
フェニレン・３，４′ジフエニルエーテルテレフタラミ
ド繊維の３６０℃での収縮率は２．０％であり、ＦＥＰ
の成形収縮率は１．７％であった。Polyparaphenylene 3,4' diphenyl ether telenotalamide fiber M (manufactured by Teijin Ltd., Decnora HM- 6 400 denier strands of 50) were braided, and FEP was extruded and coated as a sheath at a resin temperature of 360°C to give a finished outer diameter of 1.
．． Manufactures 5mm optical fiber cable. The shrinkage rate of polyparaphenylene 3,4' diphenyl ether terephthalamide fiber at 360°C is 2.0%, and FEP
The molding shrinkage rate was 1.7%.
得られた光ファイバコードの波長１．３５μ辺での伝送
損失は４．．１ｄＢ／ＫＪｎであった。The transmission loss of the obtained optical fiber cord at the wavelength of 1.35μ is 4. ．． It was 1 dB/KJn.
一方、同じ光ファイバ心線上に、テンションメンバとし
てポリパラフェニレンテレフタラミド繊＃ｔｔ（デュポ
ン社製、ケブラー）の３８０デニールのストランド６本
を編組し、この上にシースとしてＦＥＰを同様に押出被
覆して同様の光ファイバコードを製造した。ポリパラフ
ェニレンテレフタラミドｔａｂＨの３６０℃での収縮率
は０％であった。On the other hand, six 380-denier strands of polyparaphenylene terephthalamide fiber #tt (manufactured by DuPont, Kevlar) were braided on the same optical fiber as a tension member, and FEP was similarly extruded and coated on top of this as a sheath. A similar optical fiber cord was manufactured using the same method. The shrinkage rate of polyparaphenylene terephthalamide tabH at 360°C was 0%.
得られた光ファイバコードの波長１．３５μｍでの伝送
損失は９．８ｄＢ／ｌｋであり、シースの押出被覆前の
伝送損失は３．９ｄＢ／ｌｋであった。The transmission loss of the obtained optical fiber cord at a wavelength of 1.35 μm was 9.8 dB/lk, and the transmission loss before extrusion coating of the sheath was 3.9 dB/lk.
これらの結果より、シースをなすプラスチックの押出被
覆の際の成形収縮率とテンションメンバをなす繊維の押
出被覆温度近傍での収縮率との差が０．３％の前者の光
ファイバコードではシース被覆後においても伝送損失の
増加がなく、またその差が１．７％の後者の光ファイバ
コードでは伝送損失の大幅な増加が認められることがわ
かる。From these results, it was found that for the former optical fiber cord, the difference between the molding shrinkage rate during extrusion coating of the plastic forming the sheath and the shrinkage rate near the extrusion coating temperature of the fiber forming the tension member was 0.3%. It can be seen that there is no increase in transmission loss even in the latter case, and a significant increase in transmission loss is observed in the latter optical fiber cord with a difference of 1.7%.
以上説明したように、この発明の光ファイバコードは、
シースをなすプラスチックの押出被覆時の成形収縮率と
テンションメンバをなす繊維の上記シースの押出被覆温
度近傍での収縮率とがほぼ一致するようにしたものであ
るので、シースの押出被覆の際に生じるテンションメン
バのうねり、曲がりなどが防止され、伝送損失の増加が
なく安定な光伝送特性を有したものとなる。As explained above, the optical fiber cord of this invention is
The molding shrinkage rate of the plastic that makes up the sheath during extrusion coating and the shrinkage rate of the fiber that makes up the tension member near the extrusion coating temperature of the sheath are made to almost match, so when extrusion coating the sheath. Waviness, bending, etc. of the tension member that occurs is prevented, and stable optical transmission characteristics are obtained without increasing transmission loss.
第１図はこの発明に係わる光ファイバコードの例を示す
概略断面図である。
１・・・光ファイバ心線
３・・・被覆層
４・・・テンションメンバ
５・・・シースFIG. 1 is a schematic cross-sectional view showing an example of an optical fiber cord according to the present invention. 1... Optical fiber core 3... Covering layer 4... Tension member 5... Sheath
Claims (2)
バが被覆され、この上にプラスチックからなるシースが
押出被覆されてなる光ファイバコードにおいて、 上記シースをなすプラスチックの押出被覆時の成形収縮
率と上記テンションメンバをなす繊維の上記シースの押
出被覆温度近傍での収縮率とがほぼ一致していることを
特徴とする光ファイバコード。(1) In an optical fiber cord in which a tension member made of fiber is coated on an optical fiber core, and a sheath made of plastic is extruded and coated on top of the tension member, the molding shrinkage rate of the plastic forming the sheath during extrusion coating and the above An optical fiber cord characterized in that the shrinkage rate of the fiber constituting the tension member near the extrusion coating temperature of the sheath is almost the same.
ニレン・３，４′ジフェニルエーテル・テレフタラミド
であり、 上記シースをなすプラスチックが、テトラフルオロエチ
レン−パーフロロアルキルビニルエーテル共重合体、ポ
リクロルトリフルオロエチレン、テトラフルオロエチレ
ン−ヘキサフルオロエチレン共重合体のいずれか１種ま
たは２種以上のブレンド物であることを特徴とする特許
請求の範囲第１項記載の光ファイバコード。(2) The fibers forming the tension member are polyparaphenylene/3,4' diphenyl ether/terephthalamide, and the plastic forming the sheath is tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, polychlorotrifluoroethylene, tetrafluoroethylene, The optical fiber cord according to claim 1, characterized in that it is any one kind or a blend of two or more kinds of fluoroethylene-hexafluoroethylene copolymers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62320305A JPH01161208A (en) | 1987-12-18 | 1987-12-18 | Optical fiber cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62320305A JPH01161208A (en) | 1987-12-18 | 1987-12-18 | Optical fiber cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01161208A true JPH01161208A (en) | 1989-06-23 |
Family
ID=18120012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62320305A Pending JPH01161208A (en) | 1987-12-18 | 1987-12-18 | Optical fiber cord |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01161208A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197303B1 (en) * | 1996-04-26 | 2001-03-06 | Codif International S.A. | Utilization of natural algae extracts for making a product intended to prevent and care for diseases of the skin |
| JP2008015414A (en) * | 2006-07-10 | 2008-01-24 | Mitsubishi Cable Ind Ltd | Optical fiber cord |
-
1987
- 1987-12-18 JP JP62320305A patent/JPH01161208A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197303B1 (en) * | 1996-04-26 | 2001-03-06 | Codif International S.A. | Utilization of natural algae extracts for making a product intended to prevent and care for diseases of the skin |
| JP2008015414A (en) * | 2006-07-10 | 2008-01-24 | Mitsubishi Cable Ind Ltd | Optical fiber cord |
| JP4651585B2 (en) * | 2006-07-10 | 2011-03-16 | 三菱電線工業株式会社 | Optical fiber cord |
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