JPH02161407A - Heat resistant coated optical fiber - Google Patents
Heat resistant coated optical fiberInfo
- Publication number
- JPH02161407A JPH02161407A JP63314901A JP31490188A JPH02161407A JP H02161407 A JPH02161407 A JP H02161407A JP 63314901 A JP63314901 A JP 63314901A JP 31490188 A JP31490188 A JP 31490188A JP H02161407 A JPH02161407 A JP H02161407A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber
- silicone resin
- strength
- glass
- 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 38
- 229920002050 silicone resin Polymers 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 239000011247 coating layer Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000011521 glass Substances 0.000 abstract description 8
- 239000000835 fiber Substances 0.000 abstract description 7
- 239000003365 glass fiber Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000003848 UV Light-Curing Methods 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 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
- G02B6/4436—Heat resistant
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明はビルの防災管理システム等に用いるに好適な
耐熱性光ファイバ心線に関し、特に耐炎性構造の光ファ
イバ心線に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a heat-resistant coated optical fiber suitable for use in a disaster prevention management system for a building, and particularly to a coated optical fiber having a flame-resistant structure.
〈従来の技術〉
従来金属管に光ファイバを挿入した光ファイバに関する
技術は、主として光ファイバの強度、側圧、環境等光フ
ァイバ自身の弱い特性を補なう目的で利用されてきてい
る。一般にこれらの目的で用いられている金属管に挿入
される素線は被覆材としてシリコーン樹脂、ＵＶ硬化性
樹脂、ポリアミド樹脂、ポリエチレン等が被覆されてい
る。<Prior Art> Conventionally, technology related to optical fibers in which the optical fibers are inserted into metal tubes has been used mainly for the purpose of compensating for the weak characteristics of the optical fibers themselves, such as the strength, lateral pressure, and environment of the optical fibers. Generally, the strands inserted into metal tubes used for these purposes are coated with silicone resin, UV curable resin, polyamide resin, polyethylene, etc. as a coating material.
このため、これらに耐火試験を施すと、熱により光ファ
イバの被覆が熱分解あるいは燃焼し、伝送損失を増加さ
せるとともに、ファイバの強度も劣化させるので耐火用
として用いることはできない。 これを改良して耐火目
的で用いる光ファイバの製造方法は特開昭６０−２０５
６２３号公報に開示されているが、これは金属管に光フ
ァイバを挿入する直前に被覆材を除去し、裸にして挿入
するものである。この方法では被覆材の影響による伝送
損失増加は起らないものの、光ファイバを裸で金属管に
挿入するので、光ファイバのガラス表面に微少なキズが
生成し、光ファイバの強度、信頼性を低下させるという
問題を生じる。For this reason, when these are subjected to a fire resistance test, the coating of the optical fiber will thermally decompose or burn due to the heat, increasing transmission loss and degrading the strength of the fiber, so they cannot be used for fire resistance purposes. A method for manufacturing an optical fiber for use in fireproofing by improving this method was disclosed in Japanese Patent Application Laid-open No. 60-205.
This is disclosed in Japanese Patent No. 623, in which the covering material is removed immediately before an optical fiber is inserted into a metal tube, and the optical fiber is inserted bare. Although this method does not increase transmission loss due to the influence of the coating material, since the optical fiber is inserted bare into the metal tube, minute scratches are generated on the glass surface of the optical fiber, reducing the strength and reliability of the optical fiber. This causes the problem of deterioration.
前記金属管への光ファイバの挿入に当たり潤滑剤を使用
してもキズの程度を小さくするに留まり、キズの発生を
皆無とすることはできない。Even if a lubricant is used when inserting the optical fiber into the metal tube, the extent of scratches can only be reduced, and the occurrence of scratches cannot be completely eliminated.
−ａによく知られているように、このガラスのキズはた
とえごく微小なキズで強度的には問題とならないような
程度のものであっても、ストレスにより時間が経過する
に従ってキズは成長し、結局強度劣化に至るものである
。実際の使用環境下ではストレスは避は難く、又、長期
に亘り、信頼性を確保する必要があるので、前述の方法
は致命的とも云える欠点を有するものと云える。As is well known in Japan, even if these scratches on glass are extremely small and do not pose a problem in terms of strength, they will grow over time due to stress. , which ultimately leads to strength deterioration. In actual use environments, stress is unavoidable, and reliability must be ensured over a long period of time, so the above-mentioned method has a fatal drawback.
〈発明が解決しようとする課題〉
火災時の高温下でも光ファイバの被覆剤が熱により変形
し、燃焼や分解による炭化を起し、光ファイバを曲げて
伝送損失を増加させるとともに、強度も低下し、さらに
燃焼した際に発生するガス等により金属管内部の圧力を
上昇し、これにより金属管や端末部を破損させる可能性
がある。−力先ファイバを被覆剤を以て被覆することな
しに裸にしてガラスのみとし、これを金属管内に挿入す
れば表面に発生するキズにより長期信頼性を低下させる
。<Problem to be solved by the invention> Even under high temperatures during a fire, the coating material of the optical fiber is deformed by heat, causing carbonization due to combustion and decomposition, bending the optical fiber, increasing transmission loss, and reducing strength. Furthermore, the pressure inside the metal tube increases due to the gas generated during combustion, which may damage the metal tube or the end portion. - If the tip fiber is left bare without being coated with a coating material, leaving only glass, and this is inserted into a metal tube, the long-term reliability will be degraded due to scratches generated on the surface.
この発明はこのような従来の技術の課題を解決すること
を目的とする。The present invention aims to solve the problems of the conventional technology.
く課題を解決するための手段〉
この発明はガラスファイバの表面に耐熱性のラダー型シ
リコーン樹脂被覆層を設け、これを金属管内に挿入して
なる耐熱性光ファイバ心線に存する。Means for Solving the Problems The present invention resides in a heat-resistant optical fiber core wire formed by providing a heat-resistant ladder-type silicone resin coating layer on the surface of a glass fiber and inserting this into a metal tube.
ラダー型シリコーン樹脂被覆層は耐熱性が高く熱分解温
度は ℃であり、２〜１０μｍと云う非常に薄い被覆
層で十分目的を達成することができる。The ladder-type silicone resin coating layer has high heat resistance and a thermal decomposition temperature of 2° C., and a very thin coating layer of 2 to 10 μm can sufficiently achieve the purpose.
く作 用〉
ラダー型シリコーン樹脂は肉厚を非常に薄く光ファイバ
のガラス表面に形成することができ、しかも、強度的に
は通常のＵｖ硬化樹脂やシリコーン樹脂で破壊された光
ファイバ素線と同等の特性が得られる。Function> Ladder type silicone resin can be formed on the glass surface of optical fiber with a very thin wall thickness, and in terms of strength, it is comparable to optical fiber strands broken with ordinary UV curing resin or silicone resin. Equivalent characteristics can be obtained.
又、このラダー型シリコーン樹脂は熱分解温度が従来公
知の前記樹脂より高いので、たとえ熱分解したとしても
肉厚が薄いためにファイバに与えるダメージが非常に少
ない。Furthermore, since the thermal decomposition temperature of this ladder-type silicone resin is higher than that of the conventionally known resins, even if it is thermally decomposed, the damage to the fiber is extremely small because of its thin wall thickness.
又、ヤング率が高いためにキズがつきにくく、金属管内
に挿入する際に、ガラス表面にまで達するキズの発生は
皆無である。In addition, since it has a high Young's modulus, it is difficult to get scratched, and when it is inserted into a metal tube, there are no scratches that reach the glass surface.
従ってたとえば火災による火焔にさらされている間は勿
論その後も伝送損失が異常に増加することはない。Therefore, the transmission loss will not increase abnormally during or after exposure to flames caused by a fire, for example.
ラダー型シリコーン樹脂の好ましい肉厚は２〜１０μｍ
であり、２μｍより薄い場合は製造時に均一な肉厚を得
ることができなくなり、ガラス表面が表われてしまうの
で好ましくない。又１０μｍより厚い場合は製造時の線
速を低下し、製造能率を低下すること及び高温において
分解によるガラスファイバの伝送損失の増加を来すもの
で好ましくない。この発明の実施に際し、金属管として
はステンレス、アルミニウム等細径のパイプ状になるも
のであればいずれでもよく、又、金属管の外径及び肉厚
は使用目的に応じて設計する必要がある。The preferred thickness of the ladder type silicone resin is 2 to 10 μm.
If it is thinner than 2 μm, it will not be possible to obtain a uniform wall thickness during manufacturing, and the glass surface will be exposed, which is not preferable. If it is thicker than 10 .mu.m, it is not preferable because it lowers the linear velocity during manufacturing, lowers manufacturing efficiency, and increases the transmission loss of the glass fiber due to decomposition at high temperatures. When carrying out this invention, the metal tube may be made of stainless steel, aluminum, or any other material with a small diameter, and the outer diameter and wall thickness of the metal tube must be designed according to the purpose of use. .
〈実施例〉
この発明による耐熱性光ファイバ心線の構造例は図面に
示すとおりで、コアｌとクラ・ノド２とからなるガラス
ファイバ３上にラダー型シリコーン樹脂Ｎ４を設け、こ
れを金属パイプ５内に挿入してなるものである。<Example> An example of the structure of the heat-resistant optical fiber core according to the present invention is as shown in the drawings, in which a ladder-type silicone resin N4 is provided on a glass fiber 3 consisting of a core 1 and a node 2, and this is attached to a metal pipe. It is inserted into 5.
ここに用いられる光ファイバとしてはシングルモード光
ファイバでもよいが、多モード型光ファイバでもよい。The optical fiber used here may be a single mode optical fiber or a multimode optical fiber.
又、ラダー型シリコーン樹脂はペンダントグループとし
てメチル基、フェニル基、又は水素のいずれでもよい。Further, the ladder type silicone resin may have a methyl group, a phenyl group, or a hydrogen group as a pendant group.
次にコア径φ１０．ｃｚｍ、クラッド径φ１２５μｍ、
ラダー型シリコーン樹脂被覆層径φ１３５μｍの光ファ
イバを作成し、これをステンレスパイプ径φ２ ａｍ、
ｊ７さｔ ＝０．５ 重置の中に挿入して耐熱光ファイ
バ心線とした。Next, the core diameter is φ10. czm, cladding diameter φ125μm,
An optical fiber with a ladder type silicone resin coating layer diameter of φ135 μm was created, and this was made into a stainless steel pipe with a diameter of φ2 am,
j7sat = 0.5 It was inserted into a superposition to obtain a heat-resistant optical fiber core.
これについて耐火試験により伝送損失増の有無、強度低
下の有無を調べた。その結果を第１表に示しである。A fire resistance test was conducted to determine whether there was an increase in transmission loss or a decrease in strength. The results are shown in Table 1.
同時に光ファイバ心線の上に何も被覆しない光ファイバ
を用いた場合を比較例１とし、光ファイバ心線上に通常
のシリコーン樹脂もしくはナイロン樹脂を被覆した場合
を比較例２とし、実施例と同様な耐火試験を行ない、そ
の結果も第１表に示しである。At the same time, Comparative Example 1 is a case in which an optical fiber without any coating is used on the optical fiber core wire, and Comparative Example 2 is a case in which the optical fiber core wire is coated with ordinary silicone resin or nylon resin. A fire resistance test was conducted and the results are shown in Table 1.
第１表
又、被覆剤は極めて薄くてよいので、熱により被覆剤が
変形したり燃焼しても内部のガラスファイバに影響して
伝送損失を増加させることがない。Table 1 Also, since the coating material can be extremely thin, even if the coating material is deformed or burned by heat, it will not affect the internal glass fibers and increase transmission loss.
ゝＬ−はこの発明による耐熱性光ファイバ心線の一例を
示す横断面図である。
ｌ：コア ２：クランド ３：ガラスノア４：ラダー型
シリコーン樹脂被覆層
５：金属管
イバゝL- is a cross-sectional view showing an example of a heat-resistant optical fiber core according to the present invention. 1: Core 2: Clamp 3: Glass nozzle 4: Ladder type silicone resin coating layer 5: Metal tube rivet
Claims (1)
を内蔵し、外側に金属管を設けたことを特徴とする耐熱
性光ファイバ心線A heat-resistant optical fiber core wire characterized by having a built-in optical fiber having a ladder-type silicone resin coating layer and a metal tube provided on the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63314901A JPH02161407A (en) | 1988-12-15 | 1988-12-15 | Heat resistant coated optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63314901A JPH02161407A (en) | 1988-12-15 | 1988-12-15 | Heat resistant coated optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02161407A true JPH02161407A (en) | 1990-06-21 |
Family
ID=18059002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63314901A Pending JPH02161407A (en) | 1988-12-15 | 1988-12-15 | Heat resistant coated optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02161407A (en) |
-
1988
- 1988-12-15 JP JP63314901A patent/JPH02161407A/en active Pending
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