WO2010016535A1 - 光ファイバケーブル - Google Patents
光ファイバケーブル Download PDFInfo
- Publication number
- WO2010016535A1 WO2010016535A1 PCT/JP2009/063918 JP2009063918W WO2010016535A1 WO 2010016535 A1 WO2010016535 A1 WO 2010016535A1 JP 2009063918 W JP2009063918 W JP 2009063918W WO 2010016535 A1 WO2010016535 A1 WO 2010016535A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical fiber
- cable
- fiber cable
- sheath
- dynamic friction
- Prior art date
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 81
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 14
- 229920000915 polyvinyl chloride Polymers 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000011156 evaluation Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000009863 impact test Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4402—Optical cables with one single optical waveguide
Definitions
- the present invention relates to an optical fiber cable suitable for laying work in a pipeline.
- one or a plurality of optical fiber cables may be laid through the pipe.
- FTTH Fiber to the home
- a new optical fiber cable is additionally inserted into a pipe line in which a predetermined number of optical fiber cables have already been inserted. There is a need to do that.
- a method of inserting a cable into a pipeline As a method of inserting a cable into a pipeline, a method of inserting a cable by inserting a cable rod into the pipeline, attaching a cable to the end of the cable, and pulling the cable rod is generally used.
- the wire rod is inserted into the pipe, and then the cable is pulled in, so that the wire rod and the cable and two wires are required. Therefore, in order to increase the work efficiency, a method of inserting the cable by pushing the cable into the pipeline may be adopted. In this construction method, the cable is inserted only once into the conduit, and the work efficiency is improved.
- Patent Document 1 discloses an optical fiber cable in which high-density polyethylene resin is used as a jacket material and surface friction resistance is reduced.
- JP 2007-272199 A Japanese Patent No. 3929629
- the optical fiber cable described in Patent Document 1 can realize a low friction characteristic, it sometimes cracks due to the crystal part of the cable jacket and deteriorates mechanical characteristics such as impact characteristics. In addition, since it contains crystals, the productivity may deteriorate due to wear of the screw of the extruder. Moreover, although the optical fiber cable described in Patent Document 2 can realize low friction characteristics, it uses high-density polyethylene, and since the material is hard, mechanical characteristics such as impact characteristics may be deteriorated.
- the present invention has been made in view of the above, and is suitable for cable laying in a construction method for inserting a cable by pushing the cable into a pipeline, and does not deteriorate productivity. Is to provide.
- an optical fiber cable according to the present invention is an optical fiber cable having at least an optical fiber core and a sheath covering the optical fiber core.
- the dynamic friction coefficient between optical fiber cables is 0.17 or more and 0.34 or less, and the dynamic friction coefficient with a sheet made of polyvinyl chloride is 0.30 or more and 0.40 or less.
- the optical fiber cable according to the present invention is characterized in that the base resin of the sheath material contains 5 mass% or more and 15 mass% or less of silicon resin.
- an optical fiber cable that is suitable for cable laying in a construction method for inserting a cable by pushing the cable into a pipeline and that does not deteriorate manufacturability and mechanical characteristics. Can be obtained.
- FIG. 1 is a cross-sectional view showing an embodiment of the optical fiber cable of the present invention.
- the optical fiber cable of the present invention has, for example, one so-called optical fiber core wire 1 having a resin coating made of an ultraviolet curable resin or a thermosetting resin on the outer periphery of a glass optical fiber.
- a sheath 3 made of, for example, non-halogen flame retardant polyolefin or the like.
- reference numerals 6 and 6 denote both sides of the optical fiber core 1 (left and right in FIG. 1) at a predetermined distance from the optical fiber core 1, and the center is the optical fiber core wire.
- a tension member having an outer diameter of about 0.5 mm made of, for example, an aramid fiber bundle or FRP using an aramid fiber as a reinforcing fiber, and a steel wire or the like, positioned so as to be positioned on substantially the same plane as the center of 1. .
- the tension members 6 and 6 are used to protect an optical fiber having inferior mechanical strength when it receives an external force in its longitudinal direction. In FIG. 1, the distances from the center of the optical fiber core 1 to the centers of the tension members 6 and 6 are substantially equal.
- Numerals 7 and 7 are notches provided as necessary on both surfaces of the outer surface of the sheath 3 facing each other. If this notch 7 is provided, the sheath 3 can be easily cut during cable laying or the like, and the internal optical fiber core wire 1 can be easily taken out.
- the coefficient of dynamic friction between the optical fiber cables on the surface of the sheath 3 is 0.17 or more and 0.34 or less, and polyvinyl chloride (hereinafter referred to as PVC) is used.
- PVC polyvinyl chloride
- the dynamic friction coefficient with the sheet is 0.30 or more and 0.40 or less.
- the optical fiber cable of the present invention has a small coefficient of dynamic friction between the optical fiber cables, the laying operation can be easily performed even when laying multiple lines. Furthermore, since the coefficient of dynamic friction with the sheet made of PVC is small, the friction with the existing cable can be reduced, and the laying operation can be easily performed.
- the reason why the material of the sheet is PVC is that PVC is most commonly used as a sheath material of an existing cable. Further, the optical fiber cable of the present invention does not deteriorate manufacturability and mechanical properties.
- FIG. 2 is a schematic view showing a method for measuring the dynamic friction coefficient between optical fiber cables on the surface of the sheath 3.
- two 150 mm long optical fiber cables 15 shown in FIG. 1 are arranged in parallel on the base 10, and a 300 mm long optical fiber cable 20, which is a sample for measuring the friction coefficient, is placed on this. Pile up.
- the sample (measurement sample) optical fiber cable 20 the above-described 150 mm long optical fiber cables 15 and 15 are further stacked as shown in FIG. Thereafter, a holding plate 12 that slides up and down while being guided by a plurality of slide guides 11 provided vertically on the base 10 is placed in parallel with the base 10. At this time, the same optical fiber cables 15 and 20 as those of the present invention are used.
- the weight 13 is placed on the holding plate 12, and a constant load of 19.6N is applied in the direction of the arrow.
- the sample optical fiber cable 20 is pulled out at a speed of 100 mm / min using the load cell.
- F D friction force
- the friction coefficient ⁇ F D /19.6N Asked.
- the test environment was a temperature of 23 ⁇ 2 ° C. and a humidity of 50 ⁇ 10%.
- FIG. 3 is a schematic diagram showing a method for measuring the dynamic friction coefficient with the sheet made of PVC on the surface of the sheath 3.
- the 150 mm long optical fiber cables 15 and 15 are made of PVC having a width of 5 mm, a thickness of 1 mm, and a length of 150 mm.
- the other points are the same as the method of measuring the dynamic friction coefficient between the optical fiber cables on the surface of the sheath 3 shown in FIG.
- the surface roughness Ra of the sheet 35 was 0.8. Further, the surface roughness Ra of an existing cable made of PVC is generally 0.7 to 1.0.
- the bent portions are provided at positions of 3 m, 4 m, 14 m, 15 m, and 16 m from the incoming line side, and the pipelines are on a plane parallel to the floor surface from the incoming line side to 3 m, and from 15 m to 20 m, It is arranged on a plane perpendicular to the floor from 3m to 15m.
- optical fiber cable having a circular cross section in which a sheath having a diameter of 8.7 mm is made of PVC is already installed in the pipe.
- the optical fiber cable 20 as a sample was inserted into the pipe line 40 by pushing it, and the number of pieces that could be inserted was counted. In addition, 30 evaluations were inserted.
- Manufacturability was evaluated by the motor load fluctuation of the extruder at the time of sheath extrusion. At this time, a case where the motor load fluctuation of the extruder was 5% or more was evaluated as x. This is because when the motor load fluctuates, the outer diameter fluctuates.
- FIG. 5 is a schematic view showing an impact test method.
- a 300 g iron rod 52 having a cylindrical diameter of 20 mm was dropped from a height of 1 m from a vertical direction in a state where the iron plate 51 was horizontally arranged and the optical fiber cable 20 was placed thereon so that the long side thereof was in the horizontal direction.
- the impact tester 50 is provided with a guide cylinder 53 having an inner diameter slightly larger than the outer diameter of the iron bar 52 so that the dropping trajectory of the iron bar 52 does not deviate from the vertical direction. The iron bar 52 falls.
- a chamfer of R 5 mm is applied to a corner portion between the end surface and the side surface of the iron bar 52 that collides with the optical fiber cable 20. At this time, the case where the sheath cracked and the tension member was exposed was marked with x. When such an optical fiber cable is actually laid, problems such as corrosion of the tension member may occur.
- Table 1 shows the results obtained by each evaluation described above.
- the cable is connected to the conduit.
- the dynamic friction coefficient between the optical fiber cables on the sheath surface is 0.17 or more and 0.34 or less and the dynamic friction coefficient with the sheet made of PVC is 0.30 or more and 0.40 or less
- the cable is connected to the conduit.
- optical fiber cable shown in FIG. 1, only the example using the single optical fiber core wire 1 as the optical fiber core wire 1 is shown, but a plurality of optical fibers are arranged in parallel in a plane, You may use what is called an optical fiber tape core wire to which this was collectively covered. Also, the number of sheets is not limited to one and may be a plurality.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulated Conductors (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Description
そこで、作業効率を上げるため、ケーブルを管路に押し込むことによって、ケーブルを挿通する工法が採用されることがある。この工法では、ケーブルを管路内に挿通する1回だけの通線となり、作業効率が良くなる。
図1は、本発明の光ファイバケーブルの一実施例を示す横断面図である。図1に示すように、本発明の光ファイバケーブルは、例えば、ガラス光ファイバの外周に、紫外線硬化性樹脂あるいは熱硬化性樹脂等からなる樹脂被覆を有する、いわゆる光ファイバ心線1を1本配し、これに、例えば、ノンハロゲン難燃性ポリオレフィン等からなるシース3を施したものである。
このような動摩擦係数を有する光ファイバケーブルとするためには、シース材のベース樹脂に、シリコン樹脂を5質量%以上15質量%以下含ませる方法等がある。
さらにPVCからなるシートとの動摩擦係数が小さいので、既設ケーブルとの摩擦を低減でき、容易に布設作業を行うことができる。
なおここでシートの材質をPVCとしたのは、PVCが既設ケーブルのシース材料として最も一般的に用いられているからである。
また、本発明の光ファイバケーブルは、製造性および機械特性を悪化させることがない。
シース樹脂としてノンハロゲン難燃性ポリエチレンからなる樹脂を用い、ベース樹脂に含有するシリコン樹脂の配合量および結晶の種類と配合量を変化させることにより、シース表面の光ファイバケーブル同士の動摩擦係数、PVCからなるシートとの動摩擦係数を変化させた図1に示す光ファイバケーブルを製造し、管路への挿通性および製造性を評価した。なお、シース表面粗さRaは0.5~0.9であった。
また、テンションメンバ6、6としては亜鉛めっき鋼線を用いた。
光ファイバケーブルの寸法は、長辺の長さ(図1においては左右方向の長さ)が約2.0mm、短辺の長さ(図1における上下方向、すなわち幅)が約1.6mmである。
[光ファイバケーブル同士の動摩擦係数]
まず図2により、シース3の表面の光ファイバケーブル同士の動摩擦係数を測定する方法を説明する。図2はシース3の表面の光ファイバケーブル同士の動摩擦係数を測定する方法を示す概略図である。
具体的には、ベース10上に図1に示す150mm長の光ファイバケーブル15を2本隣接して並行に並べ、この上に摩擦係数を測定する試料である300mm長の光ファイバケーブル20を俵積みする。この試料用(測定サンプル)光ファイバケーブル20上に、前述した150mm長の光ファイバケーブル15、15を図2のようにさらに俵積みする。
その後、ベース10上に垂直に立設させた複数本のスライドガイド11によってガイドしながら上下にスライドする抑え板12をベース10と平行に載せる。このとき光ファイバケーブル15、20は本発明の光ファイバケーブルと同じものを使用する。
このとき、摩擦力(引抜力)FDとして、動き初めのピーク摩擦力を過ぎて最低点を示した点より60mmの位置での値を採用し、摩擦係数μ=FD/19.6Nを求めた。試料数nはn=3とした。
なお、試験環境は、温度23±2℃、湿度50±10%とした。
ところで光ファイバケーブル15、20は、試験が1回(n=1)完了する毎に交換した。
図3はシース3の表面のPVCからなるシートとの動摩擦係数を測定する方法を示す概略図である。
具体的には、図2に示すシース3の表面の光ファイバケーブル同士の動摩擦係数を測定する方法において、150mm長の光ファイバケーブル15、15を幅5mm、厚さ1mm、長さ150mmのPVCからなるシート35に変えたものであり、それ以外の点は図2に示すシース3の表面の光ファイバケーブル同士の動摩擦係数を測定する方法と同じである。
なお、シート35の表面粗さRaは0.8であった。また、PVCからなる既設のケーブルの表面粗さRaは一般的には0.7~1.0である。
管路への挿通性は図4に示す管路40を用いて評価した。
この管路40は内径22mm、全長が20mの合成樹脂製であり、図4に示すように曲げ半径R=6mm、90度の曲げ部が5箇所形成されている。なお、曲げ部は、入線側から3m、4m、14m、15m、16mの位置にそれぞれ設けられ、管路は、入線側から3mまで、および15m~20mまでは床面と平行な平面上に、3m~15mまでは床面と垂直な平面上に配置されている。
さらに管路内には直径8.7mmのシースがPVCからなる断面が円形の光ファイバケーブルが既設されている。
この管路40内に試料である光ファイバケーブル20を押し込むことにより挿通し、挿通できた本数を数えた。なお、評価本数は30本を挿通した。
製造性はシース押し出し時の押出機のモータ負荷変動により評価した。
このとき押出機のモータ負荷変動が5%以上のものを×とした。モータの負荷変動が生じると、外径変動が発生するためである。
機械特性の評価として衝撃試験を行った。図5は衝撃試験方法を示す概略図である。
鉄板51を水平に配置し、その上に光ファイバケーブル20を長辺が水平方向になるように載せた状態で、鉛直方向から円筒直径20mmの300gの鉄棒52を高さ1mから落とした。
なお、鉄棒52の落下の軌道が鉛直方向からずれないように、衝撃試験機50には鉄棒52の外径よりも内径がわずかに大きいガイド筒53が設置されており、このガイド筒53内で鉄棒52が落下するようになっている。
また、鉄棒52の光ファイバケーブル20と衝突する端面と側面の間の角部にはR=5mmの面取りが施されている。
このときシースに亀裂が入り、テンションメンバが露出したものを×とした。このような光ファイバケーブルは、実際に敷設された場合にテンションメンバの腐食等の問題が発生することがある。
また、シース表面の光ファイバケーブル同士の動摩擦係数が0.17以上、および、PVCからなるシートとの動摩擦係数が0.30以上を満たすサンプル3~5では、良好な製造性が得られた。
さらに全てのサンプルにおいて、良好な機械特性が得られた。
またその枚数も1枚に限らず複数枚であってもよい。
3 シース
6 テンションメンバ
7 切欠
10 ベース
11 スライドガイド
12 抑え板
13 錘
15、20 光ファイバケーブル
35 シート
Claims (2)
- 少なくとも光ファイバ心線と該光ファイバ心線を覆うシースとを有する光ファイバケーブルにおいて、
前記シース表面の前記光ファイバケーブル同士の動摩擦係数が0.17以上0.34以下であり、ポリ塩化ビニル(PVC)からなるシートとの動摩擦係数が0.30以上0.40以下であることを特徴とする光ファイバケーブル。 - 前記シース材のベース樹脂には、シリコン樹脂が5質量%以上15質量%以下含まれていることを特徴とする請求項1に記載の光ファイバケーブル。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09805018.0A EP2309295A4 (en) | 2008-08-07 | 2009-08-06 | FIBER OPTIC CABLE |
BRPI0917118-5A BRPI0917118B1 (pt) | 2008-08-07 | 2009-08-06 | Cabo de fibra óptica |
US13/054,968 US8837886B2 (en) | 2008-08-07 | 2009-08-06 | Optical fiber cable having a sheath and for setting in a conduit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008204563A JP5638745B2 (ja) | 2008-08-07 | 2008-08-07 | 光ファイバケーブル |
JP2008-204563 | 2008-08-07 |
Publications (1)
Publication Number | Publication Date |
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WO2010016535A1 true WO2010016535A1 (ja) | 2010-02-11 |
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ID=41663752
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PCT/JP2009/063918 WO2010016535A1 (ja) | 2008-08-07 | 2009-08-06 | 光ファイバケーブル |
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US (1) | US8837886B2 (ja) |
EP (1) | EP2309295A4 (ja) |
JP (1) | JP5638745B2 (ja) |
BR (1) | BRPI0917118B1 (ja) |
WO (1) | WO2010016535A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2008090880A1 (ja) | 2007-01-24 | 2008-07-31 | The Furukawa Electric Co., Ltd. | 光ファイバケーブル |
JP5638745B2 (ja) * | 2008-08-07 | 2014-12-10 | 古河電気工業株式会社 | 光ファイバケーブル |
JP4653213B2 (ja) | 2008-12-25 | 2011-03-16 | 古河電気工業株式会社 | 光ファイバケーブル |
JP2011232448A (ja) * | 2010-04-26 | 2011-11-17 | Fujikura Ltd | 光ファイバドロップケーブル |
JP2013257396A (ja) * | 2012-06-12 | 2013-12-26 | Fujikura Ltd | 光ファイバケーブル |
MX2016006740A (es) | 2013-12-04 | 2016-08-12 | 3M Innovative Properties Co | Revestimiento acuoso de friccion baja para cables de telecomunicacion. |
JP6605795B2 (ja) * | 2014-10-06 | 2019-11-13 | 古河電気工業株式会社 | インドアケーブル |
US10234649B2 (en) * | 2017-07-03 | 2019-03-19 | Wesco Distribution, Inc. | Fabric encased micro tubes for air blown fibers |
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Also Published As
Publication number | Publication date |
---|---|
US20110150402A1 (en) | 2011-06-23 |
EP2309295A1 (en) | 2011-04-13 |
BRPI0917118B1 (pt) | 2019-04-09 |
US8837886B2 (en) | 2014-09-16 |
EP2309295A4 (en) | 2015-03-04 |
JP5638745B2 (ja) | 2014-12-10 |
BRPI0917118A2 (pt) | 2015-11-17 |
JP2010039378A (ja) | 2010-02-18 |
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