JPH04162006A - Optical fiber colored core and its manufacture - Google Patents
Optical fiber colored core and its manufactureInfo
- Publication number
- JPH04162006A JPH04162006A JP2289953A JP28995390A JPH04162006A JP H04162006 A JPH04162006 A JP H04162006A JP 2289953 A JP2289953 A JP 2289953A JP 28995390 A JP28995390 A JP 28995390A JP H04162006 A JPH04162006 A JP H04162006A
- Authority
- JP
- Japan
- Prior art keywords
- colored
- optical fiber
- layer
- coating layer
- corona discharge
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000011247 coating layer Substances 0.000 claims description 27
- 239000010410 layer Substances 0.000 claims description 23
- 238000003851 corona treatment Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 abstract description 9
- 230000003213 activating effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 208000028659 discharge Diseases 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光通信などに使用される光ファイバ心線に関し
、とくに着色層つきの光ファイバ心線に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coated optical fiber used for optical communications and the like, and particularly to a coated optical fiber with a colored layer.
光通信に用いる光ファイバにおいては、光学カラスファ
イバ、石英系カラスファイバに限らず、いずれもファイ
バ化した後、直ちにその外周にプラスチック層覆（１次
被覆）を施すことが好ましいとされている。これは、フ
ァイバ化されることにより発生するファイバ表面のキズ
や、裸ファイバの状態で空気中にさらされることによる
クランクの成長でファイバの強度が低下するのを防ぐた
めである。このようなプラスチック層としては一般に、
熱硬化型のシリコーン樹脂、紫外線硬化型樹脂（以下「
Ｕｖ樹脂ｊという）、放射線硬化型樹脂等が用いられて
おり、近年は特にＵＶ樹脂がよく用いられている。In optical fibers used for optical communication, it is said that it is preferable to immediately apply a plastic layer covering (primary coating) to the outer periphery of any optical fiber, whether it is an optical glass fiber or a quartz-based glass fiber, after being made into a fiber. This is to prevent the strength of the fiber from decreasing due to scratches on the surface of the fiber that occur when the fiber is made into a fiber, or from the growth of cranks caused by exposing the bare fiber to the air. Generally, such a plastic layer is
Thermosetting silicone resin, ultraviolet curable resin (hereinafter referred to as “
UV resins (referred to as UV resins), radiation-curable resins, and the like are used, and UV resins are particularly frequently used in recent years.
１次被覆層としてＵＶ樹脂を用いた光ファイバ（ＵＶ樹
脂被覆光ファイバ）は、例えば線引炉により線引きされ
た光ファイバに、コーチインフタイスを用いて連続的に
ＵＶ樹脂を塗布し、続いて紫外線を照射して塗布された
Ｕ Ｖ樹脂を硬化させることにより製造される。また、
このようなＵＶ樹脂被覆光ファイバはさらに単独で又は
、複数本あわせて２次被覆が施され、光ファイバ心線と
される。この２次被覆層としで、識別のため、１本１本
のＵＶ樹脂被覆光ファイバ１こ対して着色層をコーチイ
ックすることがあり、これは、着色心線と呼ばれている
。Optical fibers using UV resin as the primary coating layer (UV resin-coated optical fibers) are produced by, for example, continuously applying UV resin to an optical fiber drawn in a drawing furnace using a coach inverter, and then It is manufactured by curing the applied UV resin by irradiating it with ultraviolet rays. Also,
Such UV resin-coated optical fibers are further coated with a secondary coating either singly or in combination to form a cored optical fiber. As this secondary coating layer, a colored layer may be coated on each UV resin coated optical fiber one by one for identification, and this is called a colored core wire.
着色心線は通常具なる色の複数本を横ｌこならへで、そ
れらの外側に一括被覆を施こすなとＪこより、テープ状
光ファイバ心線とされる。Usually, a plurality of colored core wires of a certain color are laid out horizontally and a tape-shaped optical fiber core wire is obtained by not applying a coating on the outside of the fibers all at once.
このテープ状光ファイバ心線を、ケーブル布設時などに
ジヨイントしようとする場合、端末部分の該−括被覆層
を除去して着色心線を露出させる必要がある。ところが
、−括被覆層を除去する際、着色層も一緒に除去されて
しまうことがしばしば発生する。When this tape-shaped optical fiber core is to be jointed during cable installation, it is necessary to remove the binding coating layer at the end portion to expose the colored core wire. However, when removing the cover layer, it often happens that the colored layer is also removed together.
着色層が一緒に除去されでしまうと、当然のことながら
素線の区別がつかなくなり、ジヨイント作業が大変難か
しく、長時間を要するようになるという問題が生ずる。If the colored layer is not removed at the same time, it becomes impossible to distinguish between the wires, which causes the problem that the jointing operation becomes very difficult and takes a long time.
〔問題点を解決するための手段〕
本発明は、このように−括被覆を除去する際に、着色層
も一緒に除去されてしまうといったことがなく、ンヨイ
ン［・作業を簡便に行うことが出来る光ファイバの着色
心線の製造方法を提供するものである。[Means for Solving the Problem] The present invention prevents the colored layer from being removed at the same time when the coating is removed, making it easier to carry out the work. The present invention provides a method for manufacturing a colored optical fiber.
すなわち、本発明は、光ファイバの１次被覆層表面をコ
ロナ放電により活性化させた後、好ましくは活性化させ
た直後に２次被覆層である着色層を設けることを特徴と
する光ファイバ着色心線の製造方法である。That is, the present invention provides a colored optical fiber characterized in that after the surface of the primary coating layer of the optical fiber is activated by corona discharge, a colored layer as a secondary coating layer is provided, preferably immediately after activation. This is a method for manufacturing a core wire.
コロナ放電は、ＩＫＶ〜３０に′ｖて行い得るが、５Ｋ
Ｖ〜］５Ｋｖで行うのが好ましい。Corona discharge can be performed at IKV ~ 30'v, but 5K
V~] It is preferable to carry out at 5 Kv.
本発明ｌとよれば、光ファイバの１次被覆層表面をコロ
ナ放電により活性化させた後、２次被覆層である着色層
を設けるので、１次被覆層表面ｌこ発生した活性種（ラ
ジカル）の作用により１次被覆層と着色層との間である
種の化学反応がおき、その結果、１次被覆層と着色層と
の密着性が向上する。従って、−括被覆層を除去する際
に一緒に着色層が除去されるといったことがなく、ジヨ
イント作業を簡易に行うことが出来る。According to the present invention, after the surface of the primary coating layer of the optical fiber is activated by corona discharge, the colored layer as the secondary coating layer is provided, so that active species (radicals) generated on the surface of the primary coating layer are ), a certain chemical reaction occurs between the primary coating layer and the colored layer, and as a result, the adhesion between the primary coating layer and the colored layer is improved. Therefore, the colored layer is not removed at the same time as the -coating layer is removed, and the joint work can be easily performed.
なお、コロナ放電により発生する活性種の寿命がある間
に着色層を設ける必要があるので、コロナ放電は、着色
層を形成する直前にかつ同一工程において行うことが好
ましい。Note that since it is necessary to provide the colored layer while the active species generated by corona discharge have a lifetime, it is preferable that the corona discharge be performed immediately before and in the same step as forming the colored layer.
第１表に示した通り、１次被覆層と着色層である２次被
覆層とを種々組合せて、着色心＃Ａ〜着色心線Ｆ（夫々
赤、青、黄、茶の４色）を作製した。As shown in Table 1, colored cores #A to F (four colors of red, blue, yellow, and brown, respectively) are produced by various combinations of the primary coating layer and the secondary coating layer, which is a colored layer. Created.
この際、１次被覆層を設けた後、１０ＫＶの電圧を印加
して１次被覆層表面をコロナ放電処理し、その直後に２
次被覆層である着色層を設けた。At this time, after providing the primary coating layer, a voltage of 10 KV is applied to apply a corona discharge treatment to the surface of the primary coating layer, and immediately after that, a second coating layer is applied.
A colored layer, which is the next coating layer, was provided.
つづいて、着色上ＭＡ〜着色心線Ｆの各々４本ずつ（赤
、青、黄、茶１本ずつ）を横にならべ、第２図に示した
様に、それらの外周１こ一括被覆をはとこして、テープ
状光ファイバ心線を作製した。Next, line up four each of the colored upper MA to colored core wires F (one red, one blue, one yellow, and one brown) and coat their outer peripheries all at once, as shown in Figure 2. Finally, a tape-shaped optical fiber core was produced.
１次被覆層表面にコロナ放電処理をほどこさないことを
除いて他は着色心神Ａ〜着色心線Ｅと同様に作製した着
色心線ａ〜着色心線ｅについて夫々４本ずつ（赤、青、
黄、茶１本ずつ）を横にならべ、第２図に示した様にそ
れらの外周に一括被覆をほどこしてテ−プ状光７了イハ
心線を作製し、端末部分に於て一括被覆を除去したとこ
ろ、着色層も一緒に除去されでしまい、６芯の識別がや
りにくくなってＬ才っだ。Colored core wires A to E were produced in the same manner as colored core wires A to E, except that the surface of the primary coating layer was not subjected to corona discharge treatment, and four wires each (red, blue) ,
One yellow and one brown wire) were lined up horizontally, and the outer periphery of them was coated as shown in Figure 2 to make a tape-shaped core wire. When I removed it, the colored layer was also removed, making it difficult to identify the 6 cores.
しかし、本発明の実施例で、１次被覆層表面にコロナ放
電処理をほどこした後に２次被覆層である着色層をはと
こした着色心＠Ａ〜着色心線Ｅを用いたテープ状光ファ
イバ心線の場合は、−括被覆のみを除去することが出来
、６芯の識別が容易であり、従って、ンヨイント作業の
能率が非常によかった。However, in the embodiments of the present invention, tape-shaped optical fibers using colored cores @A to colored cores E were coated with a colored layer as a secondary coating layer after corona discharge treatment was applied to the surface of the primary coating layer. In the case of core wires, only the -bracket coating could be removed, making it easy to identify the six cores, and therefore the efficiency of the joint work was very high.
【図面の簡単な説明】
第１図は、光ファイバ着色心線の断面図で、第２図は、
テープ状光ファイバ心線の断面図である。
１：光ファイバ
２：１次被覆層
３：２次被覆層（着色層）
、４：光フフイハ着色屯ｌ線
５ニ一括被覆層
６：テーブ状光ファイバ心線[Brief explanation of the drawings] Figure 1 is a cross-sectional view of a colored optical fiber, and Figure 2 is a cross-sectional view of a colored optical fiber.
FIG. 2 is a cross-sectional view of a tape-shaped optical fiber core. 1: Optical fiber 2: Primary coating layer 3: Secondary coating layer (colored layer), 4: Optical fiber colored strand 5 and bulk coating layer 6: Tabular optical fiber core wire
Claims (2)
着色層（２次被覆層）を施してなる光ファイバ着色心線
において、１次被覆層の表面をコロナ放電処理した後、
着色層を設けることを特徴とする光ファイバ着色心線の
製造方法。(1) In a colored optical fiber coated with a primary coating layer on the outer periphery of the optical fiber and a colored layer (secondary coating layer) on the outer periphery, after corona discharge treatment is applied to the surface of the primary coating layer,
A method for producing a colored optical fiber core, the method comprising providing a colored layer.
形成する直前に同一工程において１次被覆層表面にほど
こすことを特徴とする光ファイバ着色心線の製造方法。(2) A method for manufacturing a colored optical fiber, characterized in that the corona discharge treatment according to claim 1 is applied to the surface of the primary coating layer in the same step immediately before forming the colored layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2289953A JPH04162006A (en) | 1990-10-25 | 1990-10-25 | Optical fiber colored core and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2289953A JPH04162006A (en) | 1990-10-25 | 1990-10-25 | Optical fiber colored core and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04162006A true JPH04162006A (en) | 1992-06-05 |
Family
ID=17749875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2289953A Pending JPH04162006A (en) | 1990-10-25 | 1990-10-25 | Optical fiber colored core and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04162006A (en) |
-
1990
- 1990-10-25 JP JP2289953A patent/JPH04162006A/en active Pending
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