JPS6257583B2 - - Google Patents
Info
- Publication number
- JPS6257583B2 JPS6257583B2 JP57184592A JP18459282A JPS6257583B2 JP S6257583 B2 JPS6257583 B2 JP S6257583B2 JP 57184592 A JP57184592 A JP 57184592A JP 18459282 A JP18459282 A JP 18459282A JP S6257583 B2 JPS6257583 B2 JP S6257583B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- optical fiber
- resin
- present
- thermoplastic 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.)
- Expired
Links
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Description
【発明の詳細な説明】
本発明はガラスフアイバの静疲労劣化による破
断障害を防止した光フアイバ心線の製造法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cored optical fiber that prevents breakage due to static fatigue deterioration of the glass fiber.
実用に供された光ケーブル中の光フアイバは必
然的に、ケーブル化時の残留伸び歪、ケーブル布
設時の伸び歪、ケーブル温度による線膨張歪など
により伸び状態にある。ところがガラスフアイバ
はその性質上、伸びの応力が印加された状態では
静疲労が進行し、一定期間の後には破断に至つて
しまう。 Optical fibers in optical cables put into practical use are inevitably stretched due to residual elongation strain during cable formation, elongation strain during cable installation, and linear expansion strain due to cable temperature. However, due to the nature of glass fibers, static fatigue progresses when elongation stress is applied, leading to breakage after a certain period of time.
そこで本発明では、予めガラスフアイバに収縮
歪を付加しておき、使用状態で予想される伸び歪
が印加された後でも、依然としてガラスフアイバ
は伸びの状態に達しないような、静疲労に対して
安全性を保証し得る光フアイバ心線を製造する方
法を提供するものであり、熱可塑性樹脂製のテー
プをたてぞえ成型して光フアイバ素線の被覆とな
す際に、該テープを予め延伸加工しておくと共
に、テープの内側に上記樹脂より低融点の熱可塑
性樹脂をコーテイングしておき、延伸加工したテ
ープが熱収縮を起こし始める温度で溶融するコー
テイング樹脂によりテープと光フアイバを接着、
光フアイバの被覆形状を保たせると共に、樹脂の
加熱収縮を利用して光フアイバに長さ方向の収縮
歪を付加させることを特徴とする光フアイバ心線
の製造方法に関するものである。 Therefore, in the present invention, shrinkage strain is added to the glass fiber in advance, and even after the expected elongation strain is applied in the usage state, the glass fiber still does not reach the elongated state. The present invention provides a method for manufacturing optical fiber core wire that can guarantee safety, and when molding a thermoplastic resin tape to cover an optical fiber wire, the tape is pre-molded. In addition to stretching the tape, the inside of the tape is coated with a thermoplastic resin that has a lower melting point than the above resin, and the tape and optical fiber are bonded together using a coating resin that melts at the temperature at which the stretched tape begins to undergo thermal contraction.
The present invention relates to a method for manufacturing a coated optical fiber, which is characterized by maintaining the coated shape of the optical fiber and applying shrinkage strain in the length direction to the optical fiber by utilizing heat shrinkage of a resin.
第１〜３図を用いて本発明方法を詳細に説明す
る。 The method of the present invention will be explained in detail using FIGS. 1 to 3.
光フアイバ素線１はサプライ装置２より繰り出
される。予め延伸加工されたテープ３はガイドロ
ーラー４により光フアイバ素線の下部に導かれ、
第１成形治具５によりＵ字型に成形し、第２成形
治具６で光フアイバ素線に密着させた後、加熱ダ
イス７で溶着させる。加熱ダイスの温度はテープ
の熱収縮開始温度と合わせる。加熱ダイス７を出
た後、樹脂が冷却硬化する温度にまで冷却ダイス
９により冷却する。 The optical fiber wire 1 is fed out from a supply device 2. The pre-stretched tape 3 is guided to the lower part of the optical fiber by a guide roller 4,
It is formed into a U-shape using a first forming jig 5, brought into close contact with the optical fiber strand using a second forming jig 6, and then welded using a heating die 7. The temperature of the heating die is adjusted to the temperature at which the tape starts to shrink. After exiting the heating die 7, the resin is cooled by a cooling die 9 to a temperature at which the resin is cooled and hardened.
テープは第２図に示すように、成形時に光フア
イバ素線と接する側の面に、テープ自身の融点よ
り低い融点を持つ樹脂８をコーテイングしてお
き、加熱ダイス７による加熱で樹脂を溶融させて
テープとフアイバ素線を溶着する。第３図に示す
ように、テープ３自身はリング状にされておら
ず、内側にコーテイングした低融点樹脂８により
リング状に形状保持された構造となつている。 As shown in Fig. 2, the tape is coated with a resin 8 having a melting point lower than that of the tape itself on the side that contacts the optical fiber during molding, and the resin is melted by heating with a heating die 7. to weld the tape and the fiber wire. As shown in FIG. 3, the tape 3 itself is not ring-shaped, but has a structure in which the ring-shaped shape is maintained by a low melting point resin 8 coated on the inside.
テープの熱収縮は加熱ダイス部７で生じるた
め、この時点でテープと光フアイバ素線は密着し
ている必要があり、第２成形治具６以降ではテー
プ３と光フアイバ素線１とは密着させる。 Since thermal contraction of the tape occurs in the heating die part 7, the tape and the optical fiber strand must be in close contact at this point, and after the second forming jig 6, the tape 3 and the optical fiber strand 1 are in close contact. let
本発明で用いられるテープ材料としては押出被
覆時の熱で熱収縮力を発生させることができるも
のであれば何でもよいが、ポリエステル系プラス
チツクを用いることが望ましい。 The tape material used in the present invention may be any material as long as it can generate heat shrinkage force during extrusion coating, but polyester plastic is preferably used.
本発明で用いられる熱可塑性樹脂としてはエチ
レン−酢酸ビニル共重合体系、ナイロン系のホツ
トメルト接着剤が挙げられる。 Thermoplastic resins used in the present invention include ethylene-vinyl acetate copolymer and nylon hot melt adhesives.
第１図は本発明による光フアイバ心線の製造方
法の概略を示す図であり、第２図は本発明方法で
用いるテープの構造を示す図であり、第３図は本
発明方法で製造された光フアイバ心線の断面図で
ある。
FIG. 1 is a diagram showing an outline of the method for manufacturing a coated optical fiber according to the present invention, FIG. 2 is a diagram showing the structure of a tape used in the method of the present invention, and FIG. 3 is a diagram showing the structure of a tape used in the method of the present invention. FIG.
Claims (1)
周に接するようにチユーブ状に成形し、テープの
両サイドを加熱溶着させ光フアイバの被覆となし
光フアイバ心線を製造する際に、該熱可塑性樹脂
のテープを予め延伸加工しておくと共に、該テー
プの光フアイバ素線と接する面にテープ材より低
い融点の熱可塑性樹脂をコーテイングしたものを
用いることを特徴とする、光フアイバ心線の製造
方法。1 A thermoplastic resin tape is formed into a tube shape so as to be in contact with the outer periphery of the optical fiber, and both sides of the tape are heated and welded to coat the optical fiber.When manufacturing the optical fiber core wire, the thermoplastic resin is Manufacture of an optical fiber core wire, characterized in that a resin tape is stretched in advance and the surface of the tape in contact with the optical fiber is coated with a thermoplastic resin having a melting point lower than that of the tape material. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57184592A JPS5978952A (en) | 1982-10-22 | 1982-10-22 | Manufacture of optical fiber core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57184592A JPS5978952A (en) | 1982-10-22 | 1982-10-22 | Manufacture of optical fiber core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978952A JPS5978952A (en) | 1984-05-08 |
| JPS6257583B2 true JPS6257583B2 (en) | 1987-12-01 |
Family
ID=16155901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57184592A Granted JPS5978952A (en) | 1982-10-22 | 1982-10-22 | Manufacture of optical fiber core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978952A (en) |
-
1982
- 1982-10-22 JP JP57184592A patent/JPS5978952A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5978952A (en) | 1984-05-08 |
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