JPH0634857A - Optical fiber unit - Google Patents
Optical fiber unitInfo
- Publication number
- JPH0634857A JPH0634857A JP4195180A JP19518092A JPH0634857A JP H0634857 A JPH0634857 A JP H0634857A JP 4195180 A JP4195180 A JP 4195180A JP 19518092 A JP19518092 A JP 19518092A JP H0634857 A JPH0634857 A JP H0634857A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- skin layer
- layer
- foam layer
- sectional area
- 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 abstract description 31
- 239000006260 foam Substances 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 229920000098 polyolefin Polymers 0.000 claims abstract description 7
- 229920001684 low density polyethylene Polymers 0.000 abstract description 12
- 239000004702 low-density polyethylene Substances 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 229920001903 high density polyethylene Polymers 0.000 abstract description 7
- 239000004700 high-density polyethylene Substances 0.000 abstract description 7
- 239000004677 Nylon Substances 0.000 abstract description 5
- 229920001778 nylon Polymers 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract description 4
- 229920000728 polyester Polymers 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 description 11
- -1 4,4'oxybisbenzenesulfonyl Chemical group 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- NBOCQTNZUPTTEI-UHFFFAOYSA-N 4-[4-(hydrazinesulfonyl)phenoxy]benzenesulfonohydrazide Chemical compound C1=CC(S(=O)(=O)NN)=CC=C1OC1=CC=C(S(=O)(=O)NN)C=C1 NBOCQTNZUPTTEI-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、いわゆるエアブローフ
ァイバシステムに用いられる光ファイバユニットに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber unit used in a so-called air blow fiber system.
【０００２】[0002]
【従来の技術】近年、予めＣＶケーブルやインテリジェ
ントビル用ケーブルなどに内設しておいたプラスチック
パイプの中に、空気の流圧を利用して光ファイバユニッ
トを挿通し布設する、いわゆるエアブローファイバシス
テムが提案され、光ファイバの損傷が少ない方法として
注目されている。2. Description of the Related Art In recent years, a so-called air blow fiber system has been used in which an optical fiber unit is inserted through a plastic pipe previously installed in a CV cable, a cable for an intelligent building or the like by utilizing air flow pressure. Has been proposed and has been attracting attention as a method of reducing damage to an optical fiber.
【０００３】このようなエアブローファイバシステムに
用いる光ファイバユニットにおいては、伝送損失が小さ
く、かつ軽量で圧送特性に優れていることが要求され
る。The optical fiber unit used in such an air blow fiber system is required to have a small transmission loss, be lightweight and have excellent pumping characteristics.
【０００４】このため、従来は、光ファイバユニットの
外側被覆を低結晶性の低密度ポリエチレン（ＬＤＰＥ）
を高い発泡率で発泡させた発泡体で形成することが一般
に行われている。Therefore, conventionally, the outer coating of the optical fiber unit is made of low crystalline low density polyethylene (LDPE).
It is common practice to form a foam with a high expansion rate.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな外側被覆を発泡ＬＤＰＥで形成した光ファイバユニ
ットは、伝送損失および常温での圧送特性は良好なもの
の、ＬＤＰＥが、結晶化密度が低い故に温度上昇ととも
に摩擦係数が増大して滑り特性が劣化する傾向があるた
め、電力ケーブルなどの内部の温度が60〜70℃に達する
ような環境においては、良好な圧送特性を維持すること
が困難であるという問題があった。However, an optical fiber unit having such an outer coating formed of foamed LDPE has good transmission loss and pumping characteristics at room temperature, but LDPE has a low crystallization density, and therefore has a low temperature. As the friction coefficient increases as the temperature rises and the slip characteristics tend to deteriorate, it is difficult to maintain good pumping characteristics in an environment where the internal temperature of power cables reaches 60 to 70 ° C. There was a problem.
【０００６】本発明はこのような点に対処してなされた
もので、伝送損失が少なく、かつ常温はもとより高温時
においても良好な圧送特性が維持される光ファイバユニ
ットを提供することを目的とする。The present invention has been made in consideration of such a point, and an object of the present invention is to provide an optical fiber unit which has a small transmission loss and maintains good pumping characteristics not only at room temperature but also at high temperature. To do.
【０００７】[0007]
【課題を解決するための手段】すなわち、本発明の光フ
ァイバユニットは、単数または複数の光ファイバ心線の
外周に、低密度ポリオレフィンの発泡体層を設け、その
上に、滑性の良好なプラスチックスキン層を設けてなる
ことを特徴としている。That is, in the optical fiber unit of the present invention, a foam layer of low-density polyolefin is provided on the outer periphery of a single or plural optical fiber cores, and a good smoothness is provided thereon. It is characterized by being provided with a plastic skin layer.
【０００８】低密度ポリオレフィンの発泡体層として
は、密度が0.87〜0.93g/cm3 の低密度ポリエチレンに、
たとえば 4,4′オキシビスベンゼンスルホニルヒドラジ
ド（ＯＢＳＨ）のような発泡剤を添加し、これを発泡率
が10〜60％となるように発泡させたものが適している。As the low density polyolefin foam layer, a low density polyethylene having a density of 0.87 to 0.93 g / cm 3 ,
For example, a foaming agent such as 4,4'oxybisbenzenesulfonyl hydrazide (OBSH) is added and foamed so that the foaming rate is 10 to 60%.
【０００９】また、その上に設ける滑性の良好なプラス
チックスキン層としては、圧送時の摩擦係数が0.05〜0.
35程度を示すようなプラスチック材料からなるものが適
しており、たとえば圧送用のプラスチックパイプがポリ
エチレンパイプの場合には、ポリカーボネート、ポリア
セタール、アクリル、硬質ポリ塩化ビニル（硬質ＰＶ
Ｃ）、ＡＢＳ、ポリプロピレン（ＰＰ）、ポリテトラフ
ルオロエチレン（ＰＴＦＥ）、高密度ポリエチレン（Ｈ
ＤＰＥ）などの各樹脂、あるいは、これらの各樹脂に、
滑剤効果を有するフィラーを添加したものが使用され
る。フィラーとしては、有機系、無機系のいずれであっ
てもよいが、粒径が 1〜100 μｍ程度の微粉末状のもの
の使用が好ましく、より好ましくは、粒径が 5〜10μｍ
のものである。また、その添加量としては、ベース樹脂
100重量部あたり 1〜50重量部が適当である。As a plastic skin layer having good lubricity provided thereon, the coefficient of friction during pumping is 0.05 to 0.
A material made of a plastic material showing about 35 is suitable. For example, when the plastic pipe for pressure feeding is a polyethylene pipe, polycarbonate, polyacetal, acrylic, hard polyvinyl chloride (hard PV
C), ABS, polypropylene (PP), polytetrafluoroethylene (PTFE), high density polyethylene (H
DPE) or other resins, or these resins,
What added the filler which has a lubricant effect is used. The filler may be either organic or inorganic, but it is preferable to use a fine powder having a particle size of about 1 to 100 μm, and more preferably a particle size of 5 to 10 μm.
belongs to. In addition, the addition amount is based on the base resin
1 to 50 parts by weight per 100 parts by weight is suitable.
【００１０】本発明において、これらの低密度ポリオレ
フィンの発泡体層とプラスチックスキン層は、プラスチ
ックスキン層の断面積が両層を合計した断面積の 5〜70
％の範囲となるようにすることが好ましく、 5％未満で
は高温圧送特性が低下し、また、70％を超えると伝送損
失が増大するようになり、いずれの場合も本発明による
効果が十分に得られなくなるおそれがある。In the present invention, the foam layer of the low-density polyolefin and the plastic skin layer have a cross-sectional area of the plastic skin layer of 5 to 70 of the total cross-sectional area of both layers.
%, The high temperature pumping property is deteriorated when it is less than 5%, and the transmission loss is increased when it exceeds 70%. In any case, the effect of the present invention is sufficiently high. There is a risk that it will not be obtained.
【００１１】[0011]
【作用】本発明の光ファイバユニットにおいては、低密
度ポリオレフィンの発泡体層により優れた伝送特性が得
られ、また、その上に滑性の良好なプラスチックスキン
層を設けたことによって低密度ポリオレフィンの発泡体
層の高温における圧送特性が改善される。In the optical fiber unit of the present invention, the foam layer of the low-density polyolefin has excellent transmission characteristics, and the plastic skin layer having good lubricity is provided on the foam layer, so that the low-density polyolefin foam The high temperature pumping properties of the foam layer are improved.
【００１２】[0012]
【実施例】次に本発明の実施例について説明する。EXAMPLES Next, examples of the present invention will be described.
【００１３】実施例１〜３ 図１に示すように、 6条の光フアイバ心線１を引裂き用
のポリエステル紐２とともに撚り合わせ、この上にナイ
ロン樹脂被覆（厚さ 0.125mm）３を施した。次いで、こ
のナイロン樹脂被覆３上に、密度 0.920g/cm3 の低密度
ポリエチレン（ＬＤＰＥ）を押出被覆し発泡させて発泡
体層（発泡率 40％）４を形成し、さらにこの発泡体層
４上に密度 0.935g/cm3 、融点 135℃の高密度ポリエチ
レン（ＨＤＰＥ）を押出被覆してスキン層５を形成し
て、外径 2.0mm、重量 2g/m 、スキン層５の断面積比
（発泡体層４およびスキン層５の合計面積に対する比
率）が、それぞれ15、30、60％の光ファイバユニットを
製造した。Examples 1 to 3 As shown in FIG. 1, six optical fiber core wires 1 were twisted together with a polyester string 2 for tearing, and a nylon resin coating (thickness: 0.125 mm) 3 was applied on this. . Then, a low density polyethylene (LDPE) having a density of 0.920 g / cm 3 is extrusion-coated on the nylon resin coating 3 and foamed to form a foam layer (foaming rate 40%) 4, and further the foam layer 4 A high density polyethylene (HDPE) having a density of 0.935 g / cm 3 and a melting point of 135 ° C. is extrusion-coated on the top to form a skin layer 5, an outer diameter of 2.0 mm, a weight of 2 g / m 2, and a cross-sectional area ratio of the skin layer 5 ( Optical fiber units were manufactured in which the ratios of the total area of the foam layer 4 and the skin layer 5) were 15, 30, and 60%, respectively.
【００１４】次いで、これらの各光ファイバユニットに
ついて、波長1.31μｍでの光ファイバ心線からの工程下
損失増を測定した。また、圧送特性を調べるために、胴
径 1ｍφの圧送試験用ドラムに巻き付けた内径 6.0mm、
長さ500mのポリエチレンパイプに、空気を圧送用ガスと
し、圧力6.0kg/cm2 、温度23℃および70℃の条件で圧送
し、各温度における圧送時間を測定した。これらの結果
を表１に示す。Then, the in-process loss increase from the optical fiber core wire at a wavelength of 1.31 μm was measured for each of these optical fiber units. In addition, in order to investigate the pressure-feeding characteristics, an inner diameter of 6.0 mm wrapped around a drum for pressure-feeding test with a body diameter of 1 mφ,
Air was fed into a polyethylene pipe having a length of 500 m under the conditions of a pressure of 6.0 kg / cm 2 , a temperature of 23 ° C. and a temperature of 70 ° C., and the feeding time at each temperature was measured. The results are shown in Table 1.
【００１５】実施例４〜１８ スキン層５の構成を表１に示すように変えた以外は、実
施例１と同様にして光ファイバユニットを製造した。次
いで、これらの各光ファイバユニットについて、実施例
１の場合と同様にして、波長1.31μｍでの光ファイバ心
線からの工程化損失増を測定するとともに、圧送特性を
調べた。結果を表１に示す。Examples 4 to 18 Optical fiber units were manufactured in the same manner as in Example 1 except that the constitution of the skin layer 5 was changed as shown in Table 1. Then, for each of these optical fiber units, in the same manner as in Example 1, the process loss increase from the optical fiber core wire at a wavelength of 1.31 μm was measured and the pumping characteristics were examined. The results are shown in Table 1.
【００１６】実施例１９〜２２ 実施例１の場合において、スキン層５の形成材料とし
て、実施例１と同じＨＤＰＥに表１に示すような滑性を
付与するフィラーをベース樹脂 100重量部あたり10部さ
らに配合したものを用いた点を除いて、実施例１と同様
にして光ファイバユニットを製造した。次いで、これら
の各光ファイバユニットについて、実施例１の場合と同
様にして、波長1.31μｍでの光ファイバ心線からの工程
化損失増を測定するとともに、圧送特性を調べた。結果
を表１に示す。Examples 19 to 22 In the case of Example 1, as the material for forming the skin layer 5, the same HDPE as in Example 1 was added with a filler for imparting lubricity as shown in Table 1 per 100 parts by weight of the base resin. An optical fiber unit was manufactured in the same manner as in Example 1 except that the compounded part was used. Then, for each of these optical fiber units, in the same manner as in Example 1, the process loss increase from the optical fiber core wire at a wavelength of 1.31 μm was measured and the pumping characteristics were examined. The results are shown in Table 1.
【００１７】なお、表１中、比較例として示したのは、
いずれも上記実施例においてスキン層５部分も発泡体層
４で形成した例であり、比較例１が実施例と同じＬＤＰ
Ｅを用いた例、比較例２が、密度 0.935g/cm3 のＨＤＰ
Ｅを用いた例（発泡率はいずれも40％）である。In Table 1, the comparative examples are as follows.
Both are examples in which the skin layer 5 portion is also formed of the foam layer 4 in the above-mentioned examples, and the comparative example 1 is the same LDP as the examples.
HDP having a density of 0.935 g / cm 3 is an example using E and Comparative Example 2.
This is an example using E (the foaming rate is 40% in all cases).
【００１８】[0018]
【表１】 表１からも明らかなように、スキン層５を設けた実施例
の光ファイバユニットは、いずれも伝送特性が良好で、
かつ圧送特性も常温時はもとより高温時においても良好
であった。また、スキン層５にフィラーが配合されてい
るもの（実施例１９〜２０）では、圧送特性が良好で、
かつ外観も良好であった。[Table 1] As is clear from Table 1, the optical fiber units of the examples provided with the skin layer 5 all have good transmission characteristics,
Moreover, the pressure-feeding property was good not only at room temperature but also at high temperature. Further, in the case where the skin layer 5 contains a filler (Examples 19 to 20), the pumping property is good,
And the appearance was also good.
【００１９】[0019]
【発明の効果】以上の実施例からも明らかなように、本
発明によれば、光ファイバ心線の外周に低密度ポリエチ
レンの発泡体層を設け、さらにその上に滑性の良好なス
キン層を設けるようにしたので、伝送損失が小さく、し
かも常温はもとより高温においても良好な圧送特性を有
するエアブローファイバシステム用の光ファイバユニッ
トを得ることができる。As is apparent from the above embodiments, according to the present invention, a low density polyethylene foam layer is provided on the outer periphery of an optical fiber core, and a skin layer having good lubricity is further provided thereon. Since the optical fiber unit is provided, it is possible to obtain an optical fiber unit for an air blow fiber system that has a small transmission loss and that has good pumping characteristics not only at room temperature but also at high temperature.
【図１】本発明の一実施例の光ファイバユニットを示す
横断面図である。FIG. 1 is a cross-sectional view showing an optical fiber unit according to an embodiment of the present invention.
【符号の説明】 １………光ファイバ心線 ３………ナイロン樹脂被覆 ４………低密度ポリエチレンの発泡体層 ５………スキン層[Explanation of symbols] 1 ......... Optical fiber core wire 3 ......... Nylon resin coating 4 ......... Foam layer of low-density polyethylene 5 ... Skin layer
Claims (1)
に、低密度ポリオレフィンの発泡体層を設け、その上
に、滑性の良好なプラスチックスキン層を設けてなるこ
とを特徴とする光ファイバユニット。1. An optical fiber comprising a low-density polyolefin foam layer provided on the outer periphery of one or more optical fiber core wires, and a plastic skin layer having good lubricity provided thereon. unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4195180A JPH0634857A (en) | 1992-07-22 | 1992-07-22 | Optical fiber unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4195180A JPH0634857A (en) | 1992-07-22 | 1992-07-22 | Optical fiber unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0634857A true JPH0634857A (en) | 1994-02-10 |
Family
ID=16336785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4195180A Pending JPH0634857A (en) | 1992-07-22 | 1992-07-22 | Optical fiber unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634857A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010025531A (en) * | 2001-01-03 | 2001-04-06 | 김기웅 | Component fixing method of fiber ornaments |
| KR100434464B1 (en) * | 2000-08-22 | 2004-06-05 | 삼성전자주식회사 | Premise optic cable with single jacket and fabrication device thereof |
| EP1600801B1 (en) | 2002-08-10 | 2016-04-13 | Emtelle UK Limited | Cable assembly with optical fibres for blowing installation |
-
1992
- 1992-07-22 JP JP4195180A patent/JPH0634857A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100434464B1 (en) * | 2000-08-22 | 2004-06-05 | 삼성전자주식회사 | Premise optic cable with single jacket and fabrication device thereof |
| KR20010025531A (en) * | 2001-01-03 | 2001-04-06 | 김기웅 | Component fixing method of fiber ornaments |
| EP1600801B1 (en) | 2002-08-10 | 2016-04-13 | Emtelle UK Limited | Cable assembly with optical fibres for blowing installation |
| EP3073305B1 (en) | 2002-08-10 | 2017-08-02 | Emtelle UK Limited | Cable assembly for transmitting optical signals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1147879C (en) | Coaxial cable and manufacture thereof | |
| US20190164669A1 (en) | High performance support-separators for communications cables providing shielding for minimizing alien crosstalk | |
| EP0520473B1 (en) | Multi-layered foam heat-shrinkable tube | |
| JPH03164707A (en) | Optical fiber communication medium and method of manufacturing the same | |
| KR20070097346A (en) | A coat for a thermally insulated conduit | |
| JPH07505435A (en) | thermoplastic syntactic foam insulation | |
| KR20070043003A (en) | Tube bundle for optical fibres, and method of manufacturing such bundle | |
| JPH0634857A (en) | Optical fiber unit | |
| JPH0634858A (en) | Optical fiber unit | |
| RU2182868C1 (en) | Method for manufacture of coextruded multilayer pipe, device for its realization and pipe so produced | |
| JP3227091B2 (en) | Insulating material for coaxial cable, coaxial cable, and method of manufacturing coaxial cable | |
| CA2241979A1 (en) | Multi-lumen plastics tubing | |
| JPH0545525A (en) | Optical fiber cable | |
| JP3540535B2 (en) | Optical fiber unit | |
| JPS5922736A (en) | Manufacture of protective cover to piping for air conditioning | |
| JP3113297B2 (en) | Optical fiber unit | |
| EP0338854A2 (en) | Optical fibre member | |
| JP2516756Y2 (en) | Optical fiber unit for air blow installation system | |
| JP3113296B2 (en) | Optical fiber unit | |
| JP2006343536A (en) | Spacer for plastic optical fiber cable | |
| KR820002000B1 (en) | Manufacturing method of high foamable polyolefin insulating-wire | |
| JPH1123925A (en) | Tension member for optical fiber cable, and optical fiber cable using the member | |
| JP2005302412A (en) | High-frequency coaxial cable | |
| JP3195115B2 (en) | Optical fiber pumping unit, method of manufacturing the same, and optical fiber pumping method | |
| JP2000009977A (en) | Optical fiber cable |