JPH0749451Y2 - Coating material for optical fiber cable - Google Patents
Coating material for optical fiber cableInfo
- Publication number
- JPH0749451Y2 JPH0749451Y2 JP1987187543U JP18754387U JPH0749451Y2 JP H0749451 Y2 JPH0749451 Y2 JP H0749451Y2 JP 1987187543 U JP1987187543 U JP 1987187543U JP 18754387 U JP18754387 U JP 18754387U JP H0749451 Y2 JPH0749451 Y2 JP H0749451Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- optical fiber
- absorbent resin
- fiber cable
- coating material
- 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
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、光ファイバ・ケーブル等の通信用ケーブルの
構成要素であるケーブル用被覆材料に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cable coating material that is a constituent element of a communication cable such as an optical fiber cable.
〈従来技術〉 一般に通信ケーブルに用いられる光ファイバケーブル
は、一部に破損部が発生するとこの破損部から浸水し、
水がケーブルの長手方向に浸水する。光ファイバ心線に
かかっている張力により最悪の場合、破断したしまう恐
れがあった。<Prior Art> Generally, an optical fiber cable used for a communication cable is flooded from a damaged portion when the damaged portion occurs.
Water penetrates the length of the cable. In the worst case, there is a risk of breaking due to the tension applied to the optical fiber core wire.
このような問題を解決するための１つの方法として吸水
性樹脂を用いて、浸水してきた水を吸収、膨潤しダム形
成現象を利用した防水型ケーブルが提案されている。As one method for solving such a problem, a waterproof cable has been proposed which uses a water absorbent resin to absorb and swell invaded water and utilize the phenomenon of dam formation.
第４図は防水タイプのスロット型光ファイバケーブルの
断面図で、１はスロット部２を有するスロットロッド
で、３は光ファイバ線、４は介在物、５は押え巻層、６
は外被層であり、介在物４と押え巻層５に吸水性樹脂を
付したものによって走行防止を行なっている。細径化の
進んでいる光ファイバケーブルの介在物４は、ポリエチ
レンテレフタレートフィルムの両面に吸水性樹脂を付し
たシートを巾1.2〜1.5mmに細径化したテープを用いてい
る。FIG. 4 is a cross-sectional view of a waterproof type slot type optical fiber cable, 1 is a slot rod having a slot portion 2, 3 is an optical fiber wire, 4 is an inclusion, 5 is a press winding layer, and 6
Is an outer coat layer, and the inclusion 4 and the press-wound layer 5 are coated with a water-absorbent resin to prevent running. As the inclusion 4 of the optical fiber cable whose diameter has been reduced, a tape made of a polyethylene terephthalate film having a water absorbent resin on both sides and having a diameter of 1.2 to 1.5 mm is used.
このような細巾の為、不織布を基材とすると止水性能的
には優利であるが、引張強度の面でバラツキがあり容易
に使用できないという懸念があった。Due to such a narrow width, when a nonwoven fabric is used as a base material, it is advantageous in terms of waterproof performance, but there is a concern that it cannot be easily used due to variations in tensile strength.
また、両面に設けられた吸水性樹脂層のみの膨潤にたよ
ってしまう為、ケーブル内部の空隙を通過すると水のス
ピードが速い場合にどうしても走水長が長くなってしま
うものであった。Further, since the water-absorbent resin layers provided on both surfaces are swelled only, the running water length is inevitably increased when the water speed is high when passing through the void inside the cable.
〈解決しようとする問題点〉 ケーブルへの浸水の多くは、中継器、分配器等の接続部
からであるが、一般に接続部には1m程度の余長ケーブル
があり、万一の浸水の際に走水長が余長内であればケー
ブル全長を取換えることなく、走水部を切断し、再接続
が可能な為、浸水した水の走水をできるだけ短い長さで
止めることが望まれている。<Problems to be solved> Most of the water leaked into the cable comes from the connection parts of the repeater, distributor, etc.However, in general, there is an extra length cable of about 1 m at the connection part, If the running water length is within the surplus length, it is possible to cut the running water part and reconnect it without replacing the entire cable length, so it is desirable to stop the running water of the flooded water as short as possible. ing.
そして、不織布を基材としその両面に吸水性樹脂を設け
るという従来の技術による場合には、引張強度のバラツ
キが大きい為に、引張強度が弱かった場合には使用時に
破損する恐れがあり、信頼性を考慮するとケーブル用被
覆材料として容易には使用し難いという懸念がある。こ
のような心配が無いように安全側を配慮して光ファイバ
ケーブルを設計すると、使用するケーブル用被覆材料量
を増大させることにもなり、光ファイバケーブルの重量
増加やコスト高を招いてしまう。In the case of the conventional technique of providing a non-woven fabric as a base material and water-absorbent resin on both sides of the base material, there is a large variation in tensile strength, so if the tensile strength is weak, it may be damaged during use. In consideration of the properties, there is a concern that it cannot be easily used as a cable coating material. If the optical fiber cable is designed in consideration of the safety side so as to avoid such a concern, the amount of coating material used for the cable is also increased, which leads to an increase in the weight and cost of the optical fiber cable.
本考案はこれらの問題点に鑑みてなされたものであり、
細径化が進む光ファイバケーブルに対応してケーブル用
被覆材料を細巾に細条化した場合でも、安心して容易に
ケーブル用被覆材料として使用できるようにすべく、と
りわけケーブル用被覆材料の巾の細さが要求されるスロ
ット型光ファイバケーブル用としても好適となすべくし
て、前記引張強度のバラツキの問題を改善させて使用時
の破損の恐れを減らし容易に使用できるようにするこ
と、さらにそのうえ、光ファイバケーブル中の走水防止
能力は従来よりも向上出来ること、以上を満たす光ファ
イバケーブル用被覆材料を提供することを目的とする。The present invention has been made in view of these problems,
Even if the coating material for cables is narrowed to a narrow width for optical fiber cables that are becoming thinner, the width of the coating material for cables is especially In order to be suitable for a slot type optical fiber cable which requires a thinness, it is possible to reduce the risk of breakage at the time of use by improving the problem of the variation in the tensile strength so that it can be easily used. Furthermore, it is an object of the present invention to provide a coating material for an optical fiber cable which can improve the running resistance in the optical fiber cable as compared with the conventional one, and which satisfies the above requirements.
〈問題点を解決するための手段〉 本考案は、吸水性繊維を10％〜90％含む不織布と吸水性
樹脂層との積層材からなり、且つ当該不織布が当該積層
材の少なくとも片側の面に露出して設けられた光ファイ
バケーブル用被覆材料である。<Means for Solving Problems> The present invention is composed of a laminated material of a nonwoven fabric containing 10% to 90% of water absorbent fibers and a water absorbent resin layer, and the nonwoven fabric is provided on at least one surface of the laminated material. It is an exposed coating material for an optical fiber cable.
そして好ましくは、２枚の前記不織布の間に前記吸水性
樹脂層が設けられた構成の光ファイバケーブル用被覆材
料である。And, preferably, it is a coating material for an optical fiber cable in which the water absorbent resin layer is provided between two sheets of the nonwoven fabric.
これらのケーブル用被覆材料は、より細巾に細条化して
使用する場合に有効であり、このことから特にはスロッ
ト型光ファイバケーブル用として好適である。These cable coating materials are effective when they are used in a narrower strip, and are particularly suitable for slot type optical fiber cables.
ここで、不織布に含有している吸水性繊維はアクリルを
芯材とし外層がポリアクリル酸アンモニウム架橋体から
なる繊維であり、その繊維長は10mm以上の長繊維であ
る。吸水性繊維以外の繊維としては、ナイロン、ポリエ
ステル、アクリル等いずれでもかまわないが、不織布の
引張強度を保持する為に長繊維のものが望ましい。Here, the water-absorbent fiber contained in the nonwoven fabric is a fiber having an acrylic core material and an outer layer made of a crosslinked ammonium polyacrylate, and the fiber length thereof is a long fiber of 10 mm or more. The fibers other than the water-absorbent fibers may be nylon, polyester, acrylic or the like, but long fibers are preferable in order to maintain the tensile strength of the nonwoven fabric.
不織布を構成する吸水性樹脂の割合として、10％より少
ないと走水長の短縮する効果は少なく、90％より多いと
引張強度が不足し、ケーブル作製に支障が発生する。If the proportion of the water-absorbent resin constituting the non-woven fabric is less than 10%, the effect of shortening the running water length is small, and if it is more than 90%, the tensile strength is insufficient and the cable production is hindered.
また、吸水性樹脂層に用いる吸水性樹脂は、デンプン・
アクリル酸グラフト重合体、デンプン・アクリル酸重合
体、ポリアクリル酸塩架橋体、酢酸ビニル・アクリル酸
塩共重合体、イソブチレン・無水マイレン酸共重合体、
エチレンオキサイド架橋体の１つ又は組み合わせたもの
を用いる。The water-absorbent resin used in the water-absorbent resin layer is starch.
Acrylic acid graft polymer, starch / acrylic acid polymer, polyacrylic acid salt crosslinked product, vinyl acetate / acrylic acid salt copolymer, isobutylene / maleic anhydride copolymer,
One or a combination of ethylene oxide crosslinked products is used.
そして、２枚の不織布間に吸水性樹脂層を介した構成の
場合は、吸水性樹脂粉末を含有した接着剤からなり、２
枚の不織布をラミネートする方法としては、特に限定さ
れないが、加工性、その後の物性を考慮するとドライラ
ミネート法が適している。In the case where the water absorbent resin layer is interposed between the two non-woven fabrics, it is composed of an adhesive containing water absorbent resin powder.
The method for laminating the non-woven fabrics is not particularly limited, but a dry laminating method is suitable in view of processability and subsequent physical properties.
〈作用〉 吸水性樹脂層を不織布の片面に設けた場合、片面は吸水
性繊維が露出している為、押え巻きとしてクッション性
もよく、また、繊維間への水のしみ込み現象を含めた吸
水速度が速い為、走水速度が速い場合にも有利であり、
さらにもう片面側の吸水性樹脂粉末の膨張圧によって、
短時間、短距離で止水し、その後、走水の延長現象を発
生させない。<Function> When the water-absorbent resin layer is provided on one surface of the nonwoven fabric, the water-absorbent fibers are exposed on one surface, so that the cushioning property is good as a press roll, and the phenomenon of water soaking between the fibers is included. Since the water absorption speed is fast, it is also advantageous when the water running speed is fast,
By the expansion pressure of the water absorbent resin powder on the other side,
The water is stopped for a short time and in a short distance, and then the running water extension phenomenon does not occur.
また、２枚の不織布間に吸水性樹脂層を設けた場合不織
布２枚が吸水性樹脂粉末を含有した接着剤からなる吸水
性樹脂層でラミネートされている為、引張強度のバラツ
キは改善され、1.2mm〜1.5mm巾の細巾にスリットしても
ケーブル作製上、問題なく、また、両面には吸水性繊維
が露出している為、繊維間への水のしみ込み現象を含め
た吸水速度が速く、走水速度が速い場合にも、有利であ
り、さらに２枚の不織布の間に配してある吸水性樹脂粉
末の膨張圧によって、短時間、短距離で止水し、その
後、走水の延長現象を発生させない。Further, when the water absorbent resin layer is provided between the two nonwoven fabrics, the two nonwoven fabrics are laminated with the water absorbent resin layer made of an adhesive containing the water absorbent resin powder, so that the variation in tensile strength is improved, There is no problem in making the cable even if it is slit to a narrow width of 1.2 mm to 1.5 mm, and since the water-absorbent fibers are exposed on both sides, the water absorption speed including the phenomenon of water permeation between the fibers It is also advantageous when the water flow rate is fast and the water running speed is fast. Furthermore, due to the expansion pressure of the water-absorbent resin powder disposed between the two nonwoven fabrics, the water is stopped for a short time and a short distance, and then the Does not cause water extension phenomenon.
〈実施例１〉 吸水性繊維（ランシールドＦ 日本エクスラン工業社
製）80％とナイロン繊維20％を乾式法によって、坪量40
g/m2の不織布を得た。この不織布10に吸水性樹脂粉末
（スミカゲルNP−1010 住友化学製）を混合した接着剤
（EPS−703A/KP−90 大日本インキ化学製）からなる吸
水製樹脂層11をグラビアコートしてして、ドライラミネ
ート法にてもう一枚の不織布10と一体化し、第１図ａに
示したシートを得た。既シートを巾1.3mmにスリットし
第２図に示す矩形チューブに１本入れて止水試験を行な
った。その結果は１分後、24時間後共に走水長は、25cm
であった。<Example 1> 80% of water-absorbent fiber (Runshield F manufactured by Nippon Exlan Industrial Co., Ltd.) and 20% of nylon fiber were dried by a dry method to obtain a basis weight of 40
A non-woven fabric of g / m 2 was obtained. A water-absorbent resin layer 11 made of an adhesive (EPS-703A / KP-90 manufactured by Dainippon Ink and Chemicals) mixed with water-absorbent resin powder (Sumitakeru NP-1010 manufactured by Sumitomo Chemical Co., Ltd.) was gravure-coated on this nonwoven fabric 10. Then, it was integrated with another non-woven fabric 10 by the dry laminating method to obtain the sheet shown in FIG. The sheet was slit into a width of 1.3 mm, and one sheet was placed in the rectangular tube shown in FIG. 2 to perform a water stop test. As a result, the running water length was 25 cm after 1 minute and 24 hours later.
Met.
また、既シートを30mm巾にスリットしたテープを第３図
に示す２重管の内管に25mmピッチでスパイラル状に巻い
て止水試験を行なった。その結果は、１分後、24時間後
共に走水長は、18cmであった。A water-stop test was conducted by winding a tape obtained by slitting an existing sheet into a width of 30 mm around the inner pipe of the double pipe shown in Fig. 3 in a spiral shape at a pitch of 25 mm. As a result, the running water length was 18 cm both after 1 minute and after 24 hours.
〈実施例２〉 吸水性繊維（ランシールＦ 日本エクスラン工業社製）
80％とナイロン繊維20％を乾式法によって、坪量50g/m2
の不織布を得た。この不織布10の片面に吸水性樹脂（ス
ミカゲルNP−1010 住友化学工業社製）とバインダー樹
脂（スーパークロン803MW 山陽国策パルプ社製）を混
合した塗工液を塗布量が10g/m2になるように塗工し、吸
水性樹脂層11を設けたシートを30mm巾にスリットしたテ
ープを得た。（第１図ｂ）このテープを第２図に示す２
重管の内管に吸水性樹脂塗布面を内側にして25mmピッチ
でスパイラル状に巻いて止水試験を行なった。その結果
は、１分後、24時間後共に走水長は25cmであった。<Example 2> Water-absorbent fiber (Lanseal F manufactured by Nippon Exlan Co., Ltd.)
80% and nylon fiber 20% by dry method, basis weight 50g / m 2
A non-woven fabric was obtained. On one side of this non-woven fabric 10, a coating liquid in which a water absorbent resin (Sumikagel NP-1001 manufactured by Sumitomo Chemical Co., Ltd.) and a binder resin (Super Clone 803MW manufactured by Sanyo Kokusaku Pulp Co., Ltd.) are mixed is applied so that the coating amount becomes 10 g / m 2. A tape obtained by coating the sheet with the water absorbent resin layer 11 and slitting the sheet with a width of 30 mm was obtained. (Fig. 1b) This tape is shown in Fig. 2
A water-stop test was conducted by spirally winding the inner surface of the heavy pipe with the surface coated with the water-absorbing resin at a pitch of 25 mm. As a result, the running water length was 25 cm both after 1 minute and after 24 hours.
〈比較例〉 坪量が50g/m2のポリエステル100％不織布（マリックス
ユニチカ社製）の両面に実施例２と同様に片面各5g/m
2塗布量の吸水性樹脂を塗工したシートを、実施例と同
様に止水試験を行なった結果、１分後、24時間後共に走
水長は、50cmであった。<Comparative example> 100 g polyester 100% non-woven fabric having a basis weight of 50 g / m 2 (made by Marix Unitika Ltd.) is applied to both sides in the same manner as in Example 2, 5 g / m on each side.
A sheet coated with two coating amounts of the water-absorbent resin was subjected to a water stop test in the same manner as in the example. As a result, the running water length was 50 cm both after 1 minute and after 24 hours.
〈効果〉 本考案のケーブル用被覆材料は、吸水性樹脂を10％〜90
％含む不織布と吸水性樹脂層を配して一体化してなり、
好ましくは吸水性樹脂層が２枚の不織布の間に設けられ
ている構成であることから、引張強度、クッション性に
も優れている。<Effect> The cable coating material of the present invention contains 10% to 90% of water-absorbent resin.
% Non-woven fabric and water absorbent resin layer are arranged and integrated,
Since the water absorbent resin layer is preferably provided between the two nonwoven fabrics, it has excellent tensile strength and cushioning properties.
しかも、本考案によると、ケーブル用被覆材料の引張強
度のバラツキが従来よりも改善されている為に、これを
細巾に細条化して使用する際でも、従来は余程慎重に取
扱わないと破断の恐れがあったにもかかわらず、これに
よりいたって容易に扱えるようになっていることから、
光ファイバケーブルの介在物用あるいは押え巻層用とし
て好適であり、特に細巾が要求されるスロット型光ファ
イバケーブル用にはとりわけ好適となる。Moreover, according to the present invention, the variation in the tensile strength of the cable coating material is improved as compared with the conventional one. Therefore, even when using it in a narrow strip, it must be handled very carefully in the past. Even though there was a risk of breakage, this makes it extremely easy to handle,
It is suitable for inclusions or holding layers of optical fiber cables, and particularly suitable for slot type optical fiber cables that require a narrow width.
さらに、本考案によると、繊維間への水のしみ込み現象
も手伝い吸水速度が速い当該不織布が表側に設けてあり
ことや、当該吸水性樹脂が吸水時に呈する膨張圧の為
に、ケーブル用被覆材料による走水防止能力は従来の場
合よりもはるかに優れたものが得られる。Further, according to the present invention, the non-woven fabric having a high water absorption speed is provided on the front side in order to help the phenomenon of water permeation between fibers, and the expansion pressure exerted by the water absorbent resin at the time of water absorption causes a coating for a cable. The anti-running ability of the material is far superior to the conventional one.
第１図ａ、ｂは、本考案の実施例を示す断面図、第２
図、第３図は、止水試験を示す説明図、第４図は、光フ
ァイバ−ケーブルの一例を示す破断説明図である。 10…不織布、11…吸水性樹脂層1a and 1b are sectional views showing an embodiment of the present invention, and FIG.
FIG. 3 and FIG. 3 are explanatory views showing a water stop test, and FIG. 4 is a fracture explanatory view showing an example of an optical fiber cable. 10 ... Nonwoven fabric, 11 ... Water absorbent resin layer
Claims (3)
性樹脂層とを用いた積層材からなり、且つ該不織布が該
積層材の少なくとも片側の面に露出して設けられた光フ
ァイバケーブル用被覆材料。1. A light comprising a laminated material using a nonwoven fabric containing 10% to 90% of water-absorbent fibers and a water-absorbent resin layer, the nonwoven fabric being exposed on at least one surface of the laminated material. Fiber cable coating material.
が設けられている実用新案登録請求の範囲第１項記載の
光ファイバケーブル用被覆材料。2. The coating material for an optical fiber cable according to claim 1, wherein the water absorbent resin layer is provided between two sheets of the nonwoven fabric.
る実用新案登録請求の範囲第１項又は第２項のいずれか
に記載の光ファイバケーブル用被覆材料。3. The coating material for an optical fiber cable according to claim 1, which is used for a slot type optical fiber cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987187543U JPH0749451Y2 (en) | 1987-12-09 | 1987-12-09 | Coating material for optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987187543U JPH0749451Y2 (en) | 1987-12-09 | 1987-12-09 | Coating material for optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01140505U JPH01140505U (en) | 1989-09-26 |
| JPH0749451Y2 true JPH0749451Y2 (en) | 1995-11-13 |
Family
ID=31478690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987187543U Expired - Lifetime JPH0749451Y2 (en) | 1987-12-09 | 1987-12-09 | Coating material for optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749451Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4983557B2 (en) * | 2007-11-09 | 2012-07-25 | 住友電気工業株式会社 | Fiber optic cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62249117A (en) * | 1986-04-22 | 1987-10-30 | Toppan Printing Co Ltd | Optical fiber cable |
-
1987
- 1987-12-09 JP JP1987187543U patent/JPH0749451Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01140505U (en) | 1989-09-26 |
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