JPH0646250B2 - Fiber for optical transmission - Google Patents
Fiber for optical transmissionInfo
- Publication number
- JPH0646250B2 JPH0646250B2 JP61021127A JP2112786A JPH0646250B2 JP H0646250 B2 JPH0646250 B2 JP H0646250B2 JP 61021127 A JP61021127 A JP 61021127A JP 2112786 A JP2112786 A JP 2112786A JP H0646250 B2 JPH0646250 B2 JP H0646250B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- cladding
- glass
- fiber
- refractive index
- 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 - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims description 18
- 239000000835 fiber Substances 0.000 title claims description 9
- 230000003287 optical effect Effects 0.000 title claims description 7
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- -1 cyclic siloxane Chemical class 0.000 claims description 24
- 229920000642 polymer Polymers 0.000 claims description 24
- 238000005253 cladding Methods 0.000 claims description 21
- 239000011521 glass Substances 0.000 claims description 18
- 229920002050 silicone resin Polymers 0.000 claims description 17
- 239000013307 optical fiber Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 239000000654 additive Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000010409 ironing Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000013508 migration Methods 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 235000015110 jellies Nutrition 0.000 description 4
- 239000008274 jelly Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 229920005565 cyclic polymer Polymers 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000005259 measurement Methods 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
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000004447 silicone coating Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は接続時の除去が容易で、かつクラツド伝送によ
るノイズも除去できる、新規な被覆を有する光伝送用フ
アイバに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fiber for optical transmission having a novel coating that can be easily removed at the time of connection and can also remove noise due to cladding transmission.
従来、光フアイバ用被覆材料として、特開昭５９−８８
３４４号公報に記載されるような熱硬化型もしくは紫外
線硬化型シリコーン等のシリコーン系樹脂がある。また
特開昭５９−７４５０６号公報には、非反応性直鎖ポリ
オルガノシロキサンを添加した被覆材料にて被覆された
光フアイバが示されている。Conventionally, as a coating material for optical fibers, JP-A-59-88 has been used.
There are silicone resins such as heat-curable or ultraviolet-curable silicones described in Japanese Patent No. 344. Further, JP-A-59-74506 discloses an optical fiber coated with a coating material containing a non-reactive linear polyorganosiloxane.
これら従来のシリコーン系光フアイバ被覆材料について
は、ガラスと密着しすぎて光フアイバの接続時に、被覆
を除去した際ガラス上にカスが残るといつた問題点があ
つた。These conventional silicone-based optical fiber coating materials have had a problem that they are too closely adhered to the glass and dust remains on the glass when the coating is removed when the optical fiber is connected.
又、この問題点を解決するために離型剤など添加剤を加
えた場合には、曲げやしごきにより被覆層がガラスから
はがれ、その部分のクラツドモードが除けないというさ
らなる問題点が生起した。Further, when an additive such as a releasing agent is added to solve this problem, the coating layer is peeled off from the glass by bending or ironing, and the cladding mode in that portion cannot be eliminated, which causes a further problem.
又、ポリオルガノシロキサンを添加する方法では市販さ
れているポリオルガノシロキサンを無作為に用いると、
このポリオルガノシロキサンの屈折率が石英ガラスより
小さい場合など石英ガラス表面にブリードしたポリオル
ガノシロキサンによりクラツドモードが散乱、反射され
て残り、光フアイバを短尺で使用する場合のノイズとな
る問題もあつた。Further, in the method of adding the polyorganosiloxane, if a commercially available polyorganosiloxane is used at random,
When the refractive index of the polyorganosiloxane is smaller than that of quartz glass, the cladding mode is scattered and reflected by the polyorganosiloxane bleeding on the surface of the quartz glass and remains, resulting in noise when the optical fiber is used in a short length.
本発明は、上記した現状に鑑み、従来法の問題点を解決
し、接続時の除去が容易で、かつ短尺での使用において
もクラツド伝送によるノイズも除去できる、被覆された
光伝送用フアイバを提供せんとするものである。In view of the above-mentioned present situation, the present invention solves the problems of the conventional method, is easy to remove at the time of connection, and is capable of removing noise due to cladding transmission even when used in a short length, and a coated fiber for optical transmission. It is intended to be provided.
本発明者らはシリコーン系樹脂を主体とする光フアイバ
用被覆材料に、その屈折率がクラツド部ガラスより大き
な非ラジカル反応性環状シロキサン系ポリマーを添加す
ることにより前記の問題点を解決できることを見出し
た。The present inventors have found that the above-mentioned problems can be solved by adding a non-radical-reactive cyclic siloxane-based polymer having a refractive index larger than that of the glass of the cladding part to a coating material for an optical fiber mainly composed of a silicone-based resin. It was
すなわち本発明は中心部にガラスのコアおよびクラツド
を有し、外周に被覆を施してなるガラス光伝送用フアイ
バにおいて、該被覆が熱もしくはエネルギー線硬化型シ
リコーン系樹脂を主成分とし、上記クラツドの屈折率よ
り大なる屈折率を有する分子量４０００以下の非ラジカ
ル反応性環状シロキサン系ポリマーを１重量％以上添加
してなるものであることを特徴とする光伝送用フアイバ
である。That is, the present invention is a glass optical transmission fiber having a glass core and a cladding at the center and a coating on the outer periphery, the coating containing a heat or energy ray-curable silicone resin as a main component, A fiber for optical transmission, characterized in that 1% by weight or more of a non-radical-reactive cyclic siloxane-based polymer having a molecular weight of 4000 or less and having a refractive index higher than the refractive index is added.
本発明の光フアイバに用いられる被覆材料のベースとし
ては熱硬化型、紫外線などエネルギー線硬化型シリコー
ン樹脂を用いることが好ましい。As a base of the coating material used for the optical fiber of the present invention, it is preferable to use a thermosetting type or an energy ray curing type silicone resin such as ultraviolet ray.
そして本発明における被覆は下記一般式(1)で示される
化学構造を有する、その屈折率がクラツド部ガラスの屈
折率より大きい分子量４０００以下の非ラジカル反応性
環状のあシロキサン系ポリマーを、上述のベースである
熱もしくは紫外線等エネルギー線硬化型樹脂に、全体量
の１重量％以上となるよう添加してなるものである。The coating according to the present invention is a non-radical-reactive cyclic siloxane-based polymer having a chemical structure represented by the following general formula (1) and having a molecular weight of 4000 or less, the refractive index of which is higher than that of the cladding glass. It is added to the heat-curable or ultraviolet-ray energy ray-curable resin as the base so as to account for 1% by weight or more of the total amount.
一般式(1) ここで(1)においてＲはアルキル基、アリル基、アラル
キル基、水素またはポリシロキシ基のいずれかである。General formula (1) Here, in (1), R is any of an alkyl group, an allyl group, an aralkyl group, hydrogen or a polysiloxy group.
熱もしくは紫外線硬化型シリコーン樹脂に、上記一般式
(1)で表され屈折率がクラツド部ガラスより大きな分子
量４０００以下の非ラジカル反応性環状シロキサン系ポ
リマーの添加すると、該環状シロキサン系ポリマーはガ
ラス−被覆界面にブリード（bleed浸み出し）し、被覆
とガラスの間の密着力を低下させ、接続時の被覆除去に
おいてガラス上にカスが残らない。For heat or UV curable silicone resin, use the above general formula
When a non-radical-reactive cyclic siloxane-based polymer represented by (1) having a refractive index larger than that of the cladding glass and having a molecular weight of 4000 or less is added, the cyclic siloxane-based polymer bleeds at the glass-coating interface (bleed leaching), The adhesion between the coating and the glass is reduced, and no residue remains on the glass when the coating is removed during connection.
曲げ・しごき等により、被覆のハガレが生じた場合に
も、上記のようにブリードして表面に残つた該環状シロ
キサン系ポリマーが、クラツドより高い屈折率を有する
ために、クラツド伝送を効率的に除去することができ、
また光フアイバを短尺で用いる場合にも、クラツド伝送
によるノイズを完全に除くことができる。例えばクラツ
ドが石英ガラスの場合には環状シロキサン系ポリマーと
して石英ガラスの屈折率１．４５より大きな屈折率のも
のを用いる。Even when peeling of the coating occurs due to bending, ironing, etc., the cyclic siloxane polymer left on the surface by bleeding as described above has a refractive index higher than that of the cladding, so that the cladding transmission can be performed efficiently. Can be removed,
Further, even when the optical fiber is used in a short length, it is possible to completely eliminate the noise due to the cladding transmission. For example, when the cladding is quartz glass, a cyclic siloxane polymer having a refractive index higher than that of quartz glass of 1.45 is used.
このようなクラツド伝送除去の効果を得るために必要な
該環状シロキサン系ポリマーの添加量は、被覆材料全量
に対し１重量％以上である。添加の上限値は、環状シロ
キサン系ポリマーの分子量や、硬化性樹脂組成分の架橋
密度等により異つてくるが、硬化後の樹脂硬度がJIS A
法で硬度１５以上となる程度の量を目安としてもよく、
これはJIS A法硬度１５以上であれば強度的に十分であ
り、これより硬度が下る場合は、しごき等により破壊が
生じる可能性があるからである。The amount of the cyclic siloxane-based polymer required to obtain such an effect of removing the cladding transmission is 1% by weight or more based on the total amount of the coating material. The upper limit of addition depends on the molecular weight of the cyclic siloxane polymer, the crosslink density of the curable resin composition, etc., but the resin hardness after curing is JIS A
The hardness may be 15 or more by the method.
This is because if the hardness is JIS A method hardness of 15 or more, the strength is sufficient, and if the hardness is lower than this, there is a possibility that destruction may occur due to ironing or the like.
一般にシリコーン樹脂は一般に、他の非シリコーン系オ
イル成分との相溶性が悪く、これは硬化物についても同
様である。これに比し本発明で用いる環状シロキサン系
ポリマーは、光フアイバ被覆用シリコーン樹脂への溶解
性に優れており、被覆用樹脂が硬化した後も、フタル酸
系添加剤等の炭化水素系添加剤に比べて該硬化シリコー
ン樹脂被覆層への溶解性が良い。このため、被覆された
光フアイバをジエリーコンパウンド等に浸漬した場合に
も、他のオイル分に比して、環状シロキサン系ポリマー
はシリコーン樹脂への溶解性が良いので、ジエリーコン
パウンドへの移行性は小さいので、被覆層から押出され
る傾向が小さく、長期的に安定な特性が得られる。In general, silicone resins generally have poor compatibility with other non-silicone oil components, and this also applies to cured products. On the other hand, the cyclic siloxane-based polymer used in the present invention has excellent solubility in the silicone resin for optical fiber coating, and even after the coating resin is cured, a hydrocarbon-based additive such as phthalic acid-based additive. The solubility in the cured silicone resin coating layer is better than that of Therefore, even when the coated optical fiber is dipped in a jelly compound, etc., the cyclic siloxane-based polymer has better solubility in the silicone resin than other oil components, and therefore the migration to the jelly compound Since the property is small, the tendency to be extruded from the coating layer is small, and long-term stable properties can be obtained.
このように被覆光フアイバをさらにジエリーコンパウン
ド中に浸漬して用いる場合には、分子量２０００以上の
環状シロキサン系ポリマーを、被覆材料全量に対し３量
％以上含有させることが、移行性を抑え長期安定性を与
えるために好ましい。これは、低分子であるほど特に分
子量２０００以下では樹脂中での移動が早く、又このよ
うに移動の早いものは押し出されやすくジエリーコンパ
ウンド等に浸漬するには適さないからである。Thus, when the coated optical fiber is further dipped in the jelly compound and used, it is preferable to contain the cyclic siloxane polymer having a molecular weight of 2000 or more in an amount of 3% by weight or more with respect to the total amount of the coating material in order to suppress migration and long-term use. Preferred to provide stability. This is because the lower the molecular weight, the faster the movement in the resin, especially when the molecular weight is 2000 or less, and the faster the movement, the more likely it is to extrude, which is not suitable for dipping in a jerry compound or the like.
またこのようなコンパウンドに浸漬しない場合は、分子
量４０００以下の環状シロキサン系ポリマーを含有させ
た方が効果が早く現れる。すなわち、低分子量の環状ポ
リマーは同程度の分子量の直鎖ポリマーに比べ、硬化し
た樹脂中での移動速度が早い。又、前述のように分子量
は小さい程移動は早いので、効果の発現に時間的差異が
生じる。When not soaked in such a compound, the effect will appear earlier by containing a cyclic siloxane polymer having a molecular weight of 4000 or less. That is, a low molecular weight cyclic polymer has a higher migration speed in a cured resin than a linear polymer having a similar molecular weight. Further, as described above, the smaller the molecular weight, the faster the migration, so that there is a temporal difference in the manifestation of the effect.
本発明の被覆材料は上記の熱又は紫外線等エネルギー線
硬化型シリコーン樹脂、環状シロキサン系ポリマーに加
え、さらに通常の各種添加剤例えば酸化防止剤、可塑剤
等を添加することは何ら差し支えないが、このような各
種添加剤をシリコーン系樹脂に添加する場合にも、該環
状シロキサン系ポリマーは溶解性を付与するので有利で
ある。これはシリコーン樹脂が一般に他の非シリコーン
系オイル成分との相溶性が悪いのに反し、環状シロキサ
ン系ポリマーは屈折率維持のためのフエニル基等置換基
を有しているため、シリコーン系樹脂、各種添加剤のい
ずれにも溶解し易く、従つて、シロキサン系ポリマーの
添加により、各種添加剤のシリコーン樹脂への溶解性を
高めることができる。The coating material of the present invention, in addition to the above-mentioned heat or ultraviolet energy ray curable silicone resin, cyclic siloxane-based polymer, further addition of various usual additives such as antioxidants, plasticizers, etc. Even when such various additives are added to the silicone-based resin, the cyclic siloxane-based polymer imparts solubility, which is advantageous. This is contrary to the fact that silicone resins generally have poor compatibility with other non-silicone oil components, whereas cyclic siloxane polymers have substituents such as phenyl groups for maintaining the refractive index, so silicone resins, It is easily dissolved in any of various additives. Therefore, the solubility of various additives in the silicone resin can be increased by adding the siloxane polymer.
これら高屈折率シロキサン系ポリマーはシリコーン系の
樹脂を高屈折率環状シロキサン系の原料から製造する際
にその反応や、精製工程を調整することにより、該樹脂
中に残留せしめることが可能であるので、材料調整の工
程が簡単である。この点は、ポリオルガノシロキサンを
製造後に添加するような製造方法に比較して非常に有利
である。この際には高屈折率環状シロキサン系ポリマー
を開環して末端に二重結合など官能基を導入するシリコ
ーン系樹脂の製造方法を用い反応工程を制御することに
より高屈折率環状シロキサン系ポリマーを得る方法が有
効である。Since these high-refractive-index siloxane-based polymers can be left in the resin by adjusting the reaction and the purification process when a silicone-based resin is produced from a high-refractive-index cyclic siloxane-based raw material. The material adjustment process is simple. This point is very advantageous as compared with the production method in which the polyorganosiloxane is added after the production. In this case, the high-refractive-index cyclic siloxane-based polymer is prepared by opening the high-refractive-index cyclic siloxane-based polymer and introducing a functional group such as a double bond into the terminal to control the reaction step. The method of obtaining is effective.
屈折率１．５１の高屈折率熱硬化型シリコーン樹脂から
溶析法により低分子量成分を除き、硬化物から常温でキ
シレンを用いて押出したときの押出物が樹脂重量の８％
以下の分子量３００〜５０００のシリコーン系ポリマー
で、かつ押出物全体の屈折率が１．４７であるような熱
硬化型シリコーン樹脂を得た。この樹脂に屈折率１．５
０の分子量２００〜１０００の環状ポリ（メチルフエニ
ルシロキサン）を樹脂重量に対し１０部添加し熱硬化型
シリコ得た。The low molecular weight component is removed from the high refractive index thermosetting silicone resin having a refractive index of 1.51 by the elution method, and the extrudate obtained by extruding the cured product with xylene at room temperature is 8% of the resin weight.
A thermosetting silicone resin having the following molecular weight of 300 to 5,000 and having a refractive index of 1.47 as a whole was obtained. This resin has a refractive index of 1.5
A thermosetting silicone was obtained by adding 10 parts of cyclic poly (methylphenylsiloxane) having a molecular weight of 0 to 200 to the resin weight.
この熱硬化型シリコーン樹脂をコア径１０μ、クラツド
径１２５μ、△ｎ＝１％のシングルモード石英ガラスフ
アイバに被覆し、光フアイバ素線を得た。This thermosetting silicone resin was coated on a single mode quartz glass fiber having a core diameter of 10 μ, a cladding diameter of 125 μ and Δn = 1% to obtain an optical fiber strand.
この光フアイバ素線をナイロン被覆し、引抜き長１０mm
当たりの最大引抜き力を評価した結果、環状メチルフエ
ニルシロキサンを添加する以前のものと比べ、２０％小
さくなつており、またガラス上へのカスも残らなかつ
た。Nylon coating of this optical fiber wire, pull out length 10mm
As a result of evaluating the maximum drawing force per hit, it was found to be 20% smaller than that before the addition of cyclic methylphenyl siloxane, and no residue was left on the glass.
さらに曲げ、しごきを加えてガラス層と被覆層がすべる
状態にした後に、カツトオフ測定を利用してクラツド伝
送の程度を評価した結果、ガラス層と被覆層が密着して
いる場合と同様に、クラツド伝送を完全に除去すること
ができた。After further bending and ironing to make the glass layer and the coating layer slip, the cutoff measurement was used to evaluate the degree of cladding transmission.As a result, the cladding layer was adhered to the glass layer in the same manner as when the glass layer and the coating layer were in close contact. The transmission could be eliminated completely.
以上のように光フアイバのシリコーン系被覆材料中に屈
折率がクラツド部ガラスより大きな分子量４０００以下
の非ラジカル反応性環状シロキサン系ポリマーを添加す
ることにより接続時に被覆を除去した際、シリコーン被
覆層がガラス表面にカスとして残るという問題点を除く
ことができた。又、曲げやしごきを与えた本発明の被覆
を用いたフアイバについて２ｍ程度の短尺で完全にクラ
ツド伝送が除かれていることを確認できた。As described above, when a non-radical-reactive cyclic siloxane-based polymer having a refractive index larger than that of the cladding glass and a molecular weight of 4000 or less is added to the silicone-based coating material of the optical fiber, the silicone coating layer is removed when the coating is removed at the time of connection. It was possible to eliminate the problem that dust remained on the glass surface. It was also confirmed that the fiber transmission using the coating of the present invention to which bending or ironing was applied was completely free from the cladding transmission in a short length of about 2 m.
本発明の光フアイバ被覆材料は、これを用いて被覆した
光フアイバの接続時の除去が容易で光フアイバ上にカス
を残さず、また、曲げやしごきを光フアイバに加えたと
きにもクラツド伝送の効率的除去を可能とし、光フアイ
バを短尺で使用するときもクラツド伝送のノイズを除去
できる。さらに該被覆フアイバをジエリーコンパウンド
等に浸漬使用するとき、移行性を抑え長期安定性を与え
る効果を奏する。The optical fiber coating material of the present invention is easy to remove at the time of connection of the optical fiber coated using the same and does not leave residue on the optical fiber, and also when the bending or ironing is applied to the optical fiber, the cladding transmission is performed. It is possible to efficiently eliminate the noise of the cladding transmission even when the optical fiber is used in a short length. Furthermore, when the coated fiber is dipped in a jelly compound or the like, it has the effect of suppressing migration and providing long-term stability.
また、本発明の光フアイバ被覆用材料は、高屈折率シロ
キサン系原料からシリコーン系樹脂を製造する工程にお
いて反応や精製工程を調整することで、分子量４０００
以下の高屈折率環状シロキサン系ポリマーを残留させる
方法をとれば、工程数も少なく効率も良く有利に製造し
得るという利点を有している。In addition, the optical fiber coating material of the present invention has a molecular weight of 4000 by adjusting the reaction and purification steps in the step of producing a silicone resin from a high refractive index siloxane raw material.
The following method of leaving the high-refractive-index cyclic siloxane-based polymer has an advantage that it can be advantageously produced with a small number of steps and high efficiency.
Claims (1)
し、外周に被覆を施してなるガラス光伝送用フアイバに
おいて、該被覆が熱もしくはエネルギー線硬化型シリコ
ーン系樹脂を主成分とし、上記クラツドの屈折率より大
なる屈折率を有する分子量４０００以下の非ラジカル反
応性環状シロキサン系ポリマーを１重量％以上添加して
なるものであることを特徴とする光伝送用フアイバ。1. A glass optical transmission fiber having a glass core and a cladding at the center and a coating on the outer periphery, wherein the coating is mainly composed of a heat or energy ray curable silicone resin. 1. A fiber for optical transmission, comprising 1% by weight or more of a non-radical-reactive cyclic siloxane-based polymer having a molecular weight of 4000 or less and having a refractive index higher than the refractive index of 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61021127A JPH0646250B2 (en) | 1986-02-04 | 1986-02-04 | Fiber for optical transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61021127A JPH0646250B2 (en) | 1986-02-04 | 1986-02-04 | Fiber for optical transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62180312A JPS62180312A (en) | 1987-08-07 |
| JPH0646250B2 true JPH0646250B2 (en) | 1994-06-15 |
Family
ID=12046225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61021127A Expired - Lifetime JPH0646250B2 (en) | 1986-02-04 | 1986-02-04 | Fiber for optical transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646250B2 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3842110A (en) * | 1973-10-11 | 1974-10-15 | Gen Electric | Process for producing octaphenyltetracyclosiloxane |
| JPS50110341A (en) * | 1974-02-07 | 1975-08-30 | ||
| JPS54104847A (en) * | 1978-02-03 | 1979-08-17 | Nippon Telegr & Teleph Corp <Ntt> | Reinforcesd glass fiber for optical transmission |
| JPS6033777B2 (en) * | 1979-03-28 | 1985-08-05 | ト−レ・シリコ−ン株式会社 | Coating material for optical communication glass fiber |
| JPS57172302A (en) * | 1981-04-17 | 1982-10-23 | Shin Etsu Chem Co Ltd | Coating material for optical communication fiber |
| JPS5818606A (en) * | 1981-07-27 | 1983-02-03 | Toshiba Silicone Co Ltd | Coating material for optical fiber core wire |
| JPS5974506A (en) * | 1982-10-22 | 1984-04-27 | Sumitomo Electric Ind Ltd | Glass fiber for light transmission and its manufacture |
-
1986
- 1986-02-04 JP JP61021127A patent/JPH0646250B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62180312A (en) | 1987-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4270840A (en) | Glass fibers for optical transmission | |
| US4163082A (en) | U.V.-radiation method for decreasing surface tack of disposed organopolysiloxane greases and gels | |
| EP0025800B1 (en) | Coating material for optical communication glass fiber | |
| US4642265A (en) | Coating material for optical communication glass fibers and fibers made therefrom | |
| JPS6230152A (en) | Silicone coated optical fiber | |
| JPS60205503A (en) | Optical glass fiber and manufacture thereof | |
| CA1249384A (en) | Composition for coating optical communication glass fibers | |
| EP2099848B1 (en) | Hot-vulcanisable polyorganosiloxane compositions essentially used in the production of electric wires or cables | |
| JPH03425B2 (en) | ||
| JPH0646250B2 (en) | Fiber for optical transmission | |
| CA1033366A (en) | Liquid methylvinylphenylpolysiloxanic resins for electric impregnation_ | |
| JP3388597B2 (en) | Composition for plastic optical fiber cladding material and plastic optical fiber using the same | |
| FR2664897A1 (en) | HOT VULCANIZABLE ORGANOPOLYSILOXANE COMPOSITIONS, USED IN PARTICULAR FOR THE COATING OF ELECTRIC CABLES. | |
| JPS6220521B2 (en) | ||
| CN109385187A (en) | Coating composition and preparation method thereof and bending resistance optical fiber and preparation method thereof | |
| JP3534204B2 (en) | Organopolysiloxane composition for plastic optical fiber and method for producing plastic optical fiber using the same | |
| JPS5974505A (en) | Glass fiber for light transmission and its manufacture | |
| JPH08338914A (en) | Plastic optical fiber manufacturing method | |
| RU2085524C1 (en) | Uv-hardening organosilicon composition for fiber light-guide coating | |
| JP2005141082A (en) | Optical fiber array | |
| JPH04144943A (en) | Polymer clad fiber for light transmission | |
| JPS5974506A (en) | Glass fiber for light transmission and its manufacture | |
| JPH03240003A (en) | Manufacturing method of polymer clad fiber for optical transmission | |
| JPH034882B2 (en) | ||
| JPH03186807A (en) | Polymer clad fiber for optical transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |