JPS5957204A - Reinforced optical fiber - Google Patents

Reinforced optical fiber

Info

Publication number
JPS5957204A
JPS5957204A JP57163536A JP16353682A JPS5957204A JP S5957204 A JPS5957204 A JP S5957204A JP 57163536 A JP57163536 A JP 57163536A JP 16353682 A JP16353682 A JP 16353682A JP S5957204 A JPS5957204 A JP S5957204A
Authority
JP
Japan
Prior art keywords
fine particles
optical fiber
coating layer
reinforced
thermosetting resin
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
Application number
JP57163536A
Other languages
Japanese (ja)
Inventor
Ario Shirasaka
白坂　有生
Kenichi Fuse
憲一 布施
Kazuo Kondo
近藤　一男
Yuichi Tanaka
裕一 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Arisawa Mfg Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Arisawa Mfg Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd, Arisawa Mfg Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP57163536A priority Critical patent/JPS5957204A/en
Priority to AU19233/83A priority patent/AU1923383A/en
Priority to DE8383305490T priority patent/DE3375328D1/en
Priority to EP83305490A priority patent/EP0106548B1/en
Priority to CA000437050A priority patent/CA1240870A/en
Priority to BR8305127A priority patent/BR8305127A/en
Priority to KR1019830004414A priority patent/KR910001804B1/en
Publication of JPS5957204A publication Critical patent/JPS5957204A/en
Priority to AU83100/87A priority patent/AU595087B2/en
Pending legal-status Critical Current

Links

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
    • G02B6/4402—Optical cables with one single optical waveguide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00663—Production of light guides
    • 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
    • G02B6/4432—Protective covering with fibre reinforcements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)

Abstract

PURPOSE:To suppress an increase of a transmission loss in a high temperature area by mixing inorganic compound fine particles whose particle diameter is <=30mum, into a reinforced coating layer. CONSTITUTION:A reinforced coating layer 2 consists of a composite body of plural reinforced fiber materials 5, 5..., thermosetting resin 6, and inorganic compound fine particles 7, 7..., and is formed as one body to each other by using the thermosetting resin 6 as a binder. As for the inorganic compound fine particles 7, 7..., the maximum particle diameter is <=30mum, the average particle diameter is <=3.0mum, and the containing percentage of the inorganic compound fine particles 7, 7... in the reinforced coating layer 2 is <=25wt% to the thermosetting resin 6. Since the inorganic compount fine particles 7, 7... are mixed as a filler in the reinforced coating layer 2, a chip, a burr, etc. are not generated on the surface when the reinforced coating layer 2 concerned is formed, unequal lateral pressure which becomes the cause of micro-bend is not generated even in a high temperature area, and a high transmission characteristic of an optical fiber 3 can be secured.

Description

【発明の詳細な説明】 本発明は光フアイバ素線外周の強化被覆層が、複数の補
強繊維材とこれに含浸硬化された熱硬化性樹脂とよりな
る強化光ファイバの改良に関するＯ 機械的特性の向上を主たる目的として開発されている上
記強化光ファイバの場合、曲げなどに対する機械的強度
を有し、かつ、良好な可撓性をも備えているが、その強
化被覆層が補強繊維材、熱硬化性樹脂のみからなるとき
、光フアイバ素線の強化被覆に際して、つまり強化被覆
層の成形に際して、同層の表面にけずれ、ささくれなど
の外観不良が発生している。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement of a reinforced optical fiber in which the reinforcing coating layer around the outer periphery of the optical fiber is composed of a plurality of reinforcing fiber materials and a thermosetting resin impregnated and cured into the reinforcing fiber materials. In the case of the above-mentioned reinforced optical fiber, which has been developed with the main purpose of improving When the optical fiber is made of only a thermosetting resin, when reinforcing the optical fiber wire, that is, when forming the reinforcing coating layer, appearance defects such as scratches and hangnails occur on the surface of the layer.

従来では、強化被覆層中に炭酸カルシウム、ガラス短繊
維などの無機系フィラーを入れ、被覆成形時の安定性を
はかることにより、外観上の問題を解決していたが、こ
うしたフィラー入り強化被覆層をもつ光ファイバの場合
、１００〜１５０℃の高温域においてその伝送特性に低
下を来すことが実験により明らかとなった。Conventionally, problems with appearance were solved by adding inorganic fillers such as calcium carbonate and short glass fibers to the reinforced coating layer to ensure stability during coating molding. Experiments have revealed that in the case of optical fibers with 100°C to 150°C, their transmission characteristics deteriorate.

これの原因はつぎのように解明できている。The reason for this can be explained as follows.

つまり光フアイバ素線の１次コートと強化被覆層との相
対関係（こおいて、強化被覆層の径方向の線膨張係数が
５　Ｘ　１０”であるのに対し、１次コート（例えばシ
リコーンゴム）のツレが１　ｘ　１０’−’となってい
るから、高温域では１次コートがより熱膨張することと
なり、しかも１次コートの膨張による側圧が光ファイバ
にかかるとぎ、強化被覆層中の上記フィラーがこれを不
均一にしてしまい、したがって光ファイバには不均一な
側圧によるマイクロベンドが生じて伝送損失が大きくな
る。In other words, the relative relationship between the primary coating of the optical fiber and the reinforcing coating layer (in this case, the reinforcing coating layer has a linear expansion coefficient of 5 x 10" in the radial direction, while the primary coating (for example, silicone rubber) ) is 1 x 10'-', the primary coat expands more thermally in the high temperature range, and when the lateral pressure due to the expansion of the primary coat is applied to the optical fiber, the strength of the reinforcing coating layer increases. The filler makes this non-uniform, and therefore micro-bends occur in the optical fiber due to non-uniform lateral pressure, increasing transmission loss.

特に従来例の場合、前述した外観問題のみ念頭において
いたため、フィラーと伝送特性との関係を技術曲番こ解
明することはなされておらず、したがって粗粒化したフ
ィラーが強化被４３ｉＢと１次コートとの界面（１近に
ランダムに点在し、これが１次コートを歪ませ、ひいて
は光ファイバ（こマイクロベンドを発生させるといった
ことへの対策もなされていない。In particular, in the case of the conventional example, only the above-mentioned appearance problem was kept in mind, and the relationship between the filler and the transmission characteristics was not clarified in the technical section. No countermeasures have been taken against the fact that the primary coat is randomly scattered near the interface with the coat, which distorts the primary coat, and eventually causes microbends in the optical fiber.

本発明は上記の問題点に鑑み、この種の光ファイバにお
いて強化被覆層に改善を加えることにより、外観上の体
裁はもちろんのこと、高温域での良好な伝送特性がｒｔ
１ｇ保できるようにしたもので、以下その構成を図示の
実施側番こより説明する。In view of the above-mentioned problems, the present invention improves the reinforcing coating layer in this type of optical fiber, thereby improving not only the appearance but also the good transmission characteristics in the high temperature range.
1g, and its structure will be explained below from the implementation side shown in the figure.

図において、（１）は光フアイバ素線、（２）は該光フ
アイバ素線（１）の外周に形成された強化被覆層である
。In the figure, (1) is an optical fiber strand, and (2) is a reinforcing coating layer formed around the outer periphery of the optical fiber strand (1).

上記における光ファイバ素＃　［＋１は、石英系の光フ
ァイバ（３）とこれの外周に形成されたコーティング層
（４）とからなり、光ファイバ（３）はＧＩ型トカ、あ
るいはＳＩ型などであす、これのコア／クラッドは１例
として５ｏＩｔｍ／１２５μｍとなっている。The optical fiber element #[+1] in the above is composed of a silica-based optical fiber (3) and a coating layer (4) formed on the outer periphery of the optical fiber (3), and the optical fiber (3) is a GI type TOKA or SI type. As an example, the core/cladding of this is 5oItm/125μm.

一方、コーティングＦＪ＋４１はシリコーン樹脂、シリ
コーンゴムなどの熱硬化性樹脂とが、あるいはアクリレ
ートジンパウンドなどの光硬化性樹脂等よりなり、その
外径は１例として４００μｍである。On the other hand, coating FJ+41 is made of a thermosetting resin such as silicone resin or silicone rubber, or a photocuring resin such as acrylate resin, and has an outer diameter of 400 μm, for example.

このコーティング層（４）は１次コートとしての機能を
もつ他、バッファコートとしての機能も兼ね備えている
ことがあり、また、場合によっては、光ファイバ（３）
の外周に１次コート用、バッファコート用のコーティン
グ層が二層化して設けられていることがある。This coating layer (4) not only functions as a primary coat, but may also function as a buffer coat, and in some cases, coats the optical fiber (3).
Two coating layers, one for the primary coat and the other for the buffer coat, are sometimes provided on the outer periphery of the film.

つぎに強化被覆層（２）は、長尺とした複数の補強繊維
材Ｌ５）　１５１　［５１・・・・・と、熱硬化性樹脂
１６）と、無機系微粒子（７１（７１（７１・・・・・
との複合体からなり、これらは熱硬化性樹脂（６）をバ
インダーとして相互に一体化されている。Next, the reinforcing coating layer (2) is made of a plurality of elongated reinforcing fiber materials L5) 151 [51..., thermosetting resin 16), and inorganic fine particles (71 (71 (71...) ...
These are mutually integrated using a thermosetting resin (6) as a binder.

ここで用いられる補強繊維材＋５１　＋５１　ｔ５＋・
・・・・は主としてガラス繊維であり、その他のものと
してカーボン繊維、アラミツド繊維、溶融シリカ繊維、
セラミック繊維、ポリアミド繊維なども単体もしくは複
合化して用いられる。Reinforcing fiber material used here +51 +51 t5+・
... is mainly glass fiber, and other materials include carbon fiber, aramid fiber, fused silica fiber,
Ceramic fibers, polyamide fibers, etc. can also be used singly or in combination.

ざら（こ上記補強繊維材（５）　＋５１　＋５１・・・
・・はロービング状態のものがよく用いられる。Rough (the above reinforcing fiber material (5) +51 +51...
... is often used in a roving state.

一方、熱硬化性樹脂（６）はポリエステル、エポキシな
どの樹脂からなる。On the other hand, the thermosetting resin (6) is made of resin such as polyester or epoxy.

無機系微粒子＋７）　１７）　１７）・・・・・は炭酸
カルシウム、タルク、水和アルミナ、クレー、ゼオライ
トから選ばれた１種または複数種からなる。Inorganic fine particles +7) 17) 17) are made of one or more selected from calcium carbonate, talc, hydrated alumina, clay, and zeolite.

この無機系微粒子（７）（力（７）・・・・・は、最大
粒径が３０μｍ以下、平均粒径が３．０μｍ以下であり
、さらに強化被覆ｊ口（２）中ζこおける無機系微粒子
ｔ７１　＋７１　＋７）・・・・・の含有率は前記熱硬
化性樹脂（６）に対し２５瓜量チ以下となっている。The inorganic fine particles (7) (force (7)... have a maximum particle size of 30 μm or less, an average particle size of 3.0 μm or less, and furthermore, the inorganic particles in The content of the system fine particles t71 +71 +7) is less than 25% of the thermosetting resin (6).

本発明強化光ファイバの場合、強化被覆層（２）内にフ
ィラーとして無機系微粒子＋７）　１７）　＋７）・・
・・・が混入されているから、該強化被覆１（２〉の成
形時、これの表面にけずれ、ささくれなどが生ぜず、製
造面からみた外観上の問題はもちろんないのであるが、
上記無機系微粒子−＋７１　＋７１　＋７１・・・・・
いてもマイクロベンドの原因となる不均一な側圧が発生
ぜず、１光フアイバ（３）の高い伝送特性が４１１ｇ保
できることになる。In the case of the reinforced optical fiber of the present invention, the reinforcing coating layer (2) contains inorganic fine particles as filler +7) 17) +7)...
... is mixed in, so when the reinforced coating 1 (2) is molded, no scratches or hangnails occur on its surface, and of course there are no problems with the appearance from a manufacturing perspective.
The above inorganic fine particles -+71 +71 +71...
This means that even if the optical fiber (3) has a high transmission characteristic of 411g, uneven lateral pressure that causes microbending does not occur.

以下具体例につき説明する。Specific examples will be explained below.

前述した構成の強化光ファイバにおいて、その強化被覆
層（２）中における無機系微粒子（７１（７）　（７）
・・・・・の粒径が異なるものを数種つくり、これらの
評価を表に示した。In the reinforced optical fiber having the above-described structure, inorganic fine particles (71(7) (7)
Several types of particles with different particle sizes were made, and their evaluations are shown in the table.

（×＝不良、△＝菖通、○＝優れている、◎＝最も優れ
ている）上記の表で明らかなように、本発明の範囲外に
ある具体例１．２．３の場合、外観上からみた製造性は
よいとしても、高温域での伝送特性が極端に悪く故に総
合評価がいずれも不良となっているが、本発明の範囲内
にある具体例４．５．６の場合は、製造性はもちろんの
こと、Ｍ温域での伝送特性が格段にすぐれている。(×=Poor, △=Performance, ○=Excellent, ◎=Most excellent) As is clear from the table above, in the case of Specific Example 1.2.3 which is outside the scope of the present invention, the appearance Although the manufacturability is good when viewed from above, the overall evaluation is poor because the transmission characteristics in the high temperature range are extremely poor, but in the case of specific example 4.5.6 which is within the scope of the present invention. , it not only has excellent manufacturability but also has extremely excellent transmission characteristics in the M temperature range.

また、納２図により４０１度特性を検した場合でも、本
発明の範囲内にあるａ（無機系微粒子（７）の最大粒径
５μｍ以下）、ｂ（同１０ｐｆｎ　）。Furthermore, even when the 401 degree characteristics are examined according to Fig. 2, the values a (maximum particle size of inorganic fine particles (7) of 5 μm or less) and b (10 pfn) are within the scope of the present invention.

Ｃ（同３０１１ｙｎ　）の場合は高温域における伝送損
失増が小さく、特にａの場合は損失変化のない安定した
伝送特性を示しているが、本発明の範囲外にあるｄ（無
機系微粒子の最大粒径５０融）、ｅ（同８０堀）の場合
は高温域での伝送損失増がかなり大きくなっている。In the case of C (3011yn), the increase in transmission loss in the high temperature range is small, and in particular, in the case of a, stable transmission characteristics with no change in loss are shown. In the case of particle diameters of 50 mol) and e (80 mol), the increase in transmission loss in the high temperature range is quite large.

以上説明した通り、本発明は元ファイバ素線外周の強化
被佼層が、ｒＭ教の補強繊維材とこれに含浸硬化された
熱硬化性樹１１Ｍからなる強化光ファイバにおいて、上
記強化被覆層内に粒径３０ノ軸以下の無機系微粒子が混
入されていることを特徴としているから、強化被接ｊ−
成形時の外観が好体裁に保持できるだけでなく、当該強
化光ファイバの高温域における伝送損失増が抑えられる
。As explained above, the present invention provides a reinforced optical fiber in which the reinforcing covering layer on the outer periphery of the original fiber strand is made of an rM reinforcing fiber material and a thermosetting resin 11M impregnated and hardened therein. It is characterized by the fact that inorganic fine particles with a particle size of 30 or less are mixed into the reinforcing joint.
Not only can the appearance at the time of molding be kept good, but also an increase in transmission loss in the high temperature range of the reinforced optical fiber can be suppressed.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明強化光ファイノくの断面図、第２図は強
化光ファイノくの伝送特性と温度との関係を示した特性
図である。 （１）・−・・光フアイバ素線 （２）・・・・・強化被覆層 （５）・・・・・補強繊維材 （６）・・・・・熱硬化性樹脂 （７）・・・・・無機系微粒子 −１りFIG. 1 is a sectional view of the reinforced optical fiber of the present invention, and FIG. 2 is a characteristic diagram showing the relationship between the transmission characteristics and temperature of the reinforced optical fiber. (1) --- Optical fiber wire (2) --- Reinforced coating layer (5) --- Reinforced fiber material (6) --- Thermosetting resin (7) --- ...Inorganic fine particles-1

Claims (1)

【特許請求の範囲】 ＋１）　　光フアイバ素線外周の強化被覆層が、複数の
補強繊維材とこれに含浸硬化された熱硬化性樹脂とから
なる強化光ファイバにおいて、上記強化被覆層内に粒径
３０μｍ以下の無機系微粒子が混入されている強化光フ
ァイバ。 （２）無機系微粒子の平均粒径が３．０μｍ以下である
特許請求の範囲第１項記載の強化光ファイバ。 （３）無機系微粒子／熱硬化性樹脂が２５重量％以下で
ある特許請求の範囲第１項記戦の強化光ファイバ。 （４）無機系微粒子が炭酸カルシウム、タルク、水和ア
ルミナ、クレー、ゼオライトから選ばれた１種または複
数種からなる特許請求の範囲第１項または第２項または
第３項記戦の強化光ファイバ。[Scope of Claims] +1) In a reinforced optical fiber in which the reinforcing coating layer on the outer periphery of the optical fiber strand is composed of a plurality of reinforcing fiber materials and a thermosetting resin impregnated and cured therein, grains are included in the reinforcing coating layer. A reinforced optical fiber mixed with inorganic fine particles with a diameter of 30 μm or less. (2) The reinforced optical fiber according to claim 1, wherein the inorganic fine particles have an average particle size of 3.0 μm or less. (3) The reinforced optical fiber according to claim 1, wherein the content of inorganic fine particles/thermosetting resin is 25% by weight or less. (4) The inorganic fine particles are made of one or more selected from calcium carbonate, talc, hydrated alumina, clay, and zeolite. fiber.
JP57163536A 1982-09-20 1982-09-20 Reinforced optical fiber Pending JPS5957204A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP57163536A JPS5957204A (en) 1982-09-20 1982-09-20 Reinforced optical fiber
AU19233/83A AU1923383A (en) 1982-09-20 1983-09-19 Coated optical fibres
DE8383305490T DE3375328D1 (en) 1982-09-20 1983-09-19 Coated optical fibers
EP83305490A EP0106548B1 (en) 1982-09-20 1983-09-19 Coated optical fibers
CA000437050A CA1240870A (en) 1982-09-20 1983-09-19 Coated optical fibers
BR8305127A BR8305127A (en) 1982-09-20 1983-09-20 COATED OPTICAL FIBERS
KR1019830004414A KR910001804B1 (en) 1982-09-20 1983-09-20 Sheathed fiber optic
AU83100/87A AU595087B2 (en) 1982-09-20 1987-12-29 Coated optical fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57163536A JPS5957204A (en) 1982-09-20 1982-09-20 Reinforced optical fiber

Publications (1)

Publication Number Publication Date
JPS5957204A true JPS5957204A (en) 1984-04-02

Family

ID=15775740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57163536A Pending JPS5957204A (en) 1982-09-20 1982-09-20 Reinforced optical fiber

Country Status (1)

Country Link
JP (1) JPS5957204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06102441A (en) * 1992-03-24 1994-04-15 American Teleph & Telegr Co <Att> Optical fiber with improved humidity resistance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51117641A (en) * 1975-03-18 1976-10-15 Telephone Cables Ltd Optical fiber waveguide
JPS5782149A (en) * 1980-11-12 1982-05-22 Furukawa Electric Co Ltd:The Reinforced optical fiber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51117641A (en) * 1975-03-18 1976-10-15 Telephone Cables Ltd Optical fiber waveguide
JPS5782149A (en) * 1980-11-12 1982-05-22 Furukawa Electric Co Ltd:The Reinforced optical fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06102441A (en) * 1992-03-24 1994-04-15 American Teleph & Telegr Co <Att> Optical fiber with improved humidity resistance

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