JPH11106668A - Water stop resin mixture for cable joint - Google Patents
Water stop resin mixture for cable jointInfo
- Publication number
- JPH11106668A JPH11106668A JP9291658A JP29165897A JPH11106668A JP H11106668 A JPH11106668 A JP H11106668A JP 9291658 A JP9291658 A JP 9291658A JP 29165897 A JP29165897 A JP 29165897A JP H11106668 A JPH11106668 A JP H11106668A
- Authority
- JP
- Japan
- Prior art keywords
- water
- resin
- cable
- water stop
- resin mixture
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Cable Accessories (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、ケーブルのジョイ
ント部分に用いられる止水樹脂混和物の改良に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a water-blocking resin mixture used for a joint portion of a cable.
【0002】[0002]
【従来の技術】海底や河川中などに布設されるケーブル
の場合、ジョイント部分では、水などの浸入がないよう
に、例えば図1に示すように、ケーブル1,1のジョイ
ント部分2の外方に管状の保護部材3を被せ、この保護
部材3とケーブル外周との間に止水樹脂混和物4,4を
充填している。そして、この止水樹脂混和物4として
は、通常ポリウレタンやエポキシ樹脂などを用いてい
る。2. Description of the Related Art In the case of a cable laid on the sea floor or in a river, for example, as shown in FIG. Is covered with a tubular protection member 3, and a space between the protection member 3 and the outer periphery of the cable is filled with a water-stopping resin mixture 4,4. As the water-stopping resin mixture 4, polyurethane, epoxy resin or the like is usually used.
【0003】[0003]
【発明が解決しようとする課題】ところが、上記のよう
なポリウレタンやエポキシ樹脂などの止水樹脂混和物4
にあっては、樹脂硬化時の収縮などによって、保護部材
3との間に隙間が生じ易く、止水機能が損なわれるとい
う問題があった。このため、なるべく樹脂収縮などが生
じないように、硬化温度を低めに抑えて、硬化させる必
要があり、作業性の低下が避けられないという問題もあ
った。また、硬化時の収縮作用によって強固な充填状態
が得られないと、外部からの応力の作用によって、止水
樹脂混和物4に歪みが生じ易く、やはり水が浸入するよ
うになる恐れがあった。However, water-blocking resin admixtures such as polyurethane and epoxy resins as described above 4
In this case, there is a problem that a gap is easily formed between the protective member 3 and the resin due to shrinkage at the time of curing the resin, and the water stopping function is impaired. For this reason, it is necessary to cure the resin at a low curing temperature so as not to cause resin shrinkage as much as possible, and there is also a problem that a reduction in workability cannot be avoided. Further, if a strong filling state cannot be obtained due to the shrinkage effect at the time of curing, the water-blocking resin admixture 4 is likely to be distorted by the action of external stress, and water may possibly enter. .
【0004】本発明は、このような従来の問題点に鑑み
てなされたもので、ベース樹脂に高吸水性ポリマーを添
加して、上記従来の問題点を解消せんとするものであ
る。The present invention has been made in view of such a conventional problem, and an object of the present invention is to add a superabsorbent polymer to a base resin to solve the above conventional problem.
【0005】[0005]
【課題を解決するための手段】請求項1記載の本発明
は、ケーブルのジョイント部分に用いられる止水樹脂混
和物であって、ベース樹脂100重量部に高吸水性ポリ
マーを10〜100重量部添加したことを特徴とするケ
ーブルジョイント用止水樹脂混和物にある。The present invention according to claim 1 is a water-blocking resin admixture used for a joint portion of a cable, wherein 100 parts by weight of a base resin contains 10 to 100 parts by weight of a highly water-absorbing polymer. A water-sealing resin mixture for cable joints characterized by being added.
【0006】請求項2記載の本発明は、前記高吸水性ポ
リマーがイソブチレン−無水マレイン酸であることを特
徴とする請求項1記載のケーブルジョイント用止水樹脂
混和物にある。According to a second aspect of the present invention, there is provided the water-blocking resin admixture for a cable joint according to the first aspect, wherein the superabsorbent polymer is isobutylene-maleic anhydride.
【0007】[0007]
【発明の実施の形態】本発明で用いられるベース樹脂と
しては、イソシアヌレートなどのポリウレタンやビスフ
ェノールA型液状樹脂などのエポキシ樹脂のようなエン
ジニアリングプラスチックが挙げられる。一方、本発明
で用いられる高吸水性ポリマーとしては、イソブチレン
−無水マレイン酸共重合体、酢酸ビニル・アクリル酸エ
ステル共重合体鹸化物、ポリエチレンオキサイド系重合
体などが挙げられる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the base resin used in the present invention include engineering plastics such as polyurethane such as isocyanurate and epoxy resin such as bisphenol A type liquid resin. On the other hand, examples of the superabsorbent polymer used in the present invention include an isobutylene-maleic anhydride copolymer, a saponified vinyl acetate / acrylate copolymer, and a polyethylene oxide polymer.
【0008】そして、高吸水性ポリマーの添加量を、ベ
ース樹脂100重量部に対して、10〜100重量部添
加するものとした。その理由は、10重量部未満では、
十分な止水機能が得られず、逆に、100重量部を越え
るようになると、混和物の機械的特性や加工性が低下し
たりするようになって、かえって不都合が生じるように
なるからである。The amount of the superabsorbent polymer to be added is 10 to 100 parts by weight based on 100 parts by weight of the base resin. The reason is that if less than 10 parts by weight,
If a sufficient water stopping function cannot be obtained, and if it exceeds 100 parts by weight, the mechanical properties and workability of the admixture will be reduced, and inconvenience will occur. is there.
【0009】この高吸水性ポリマーの添加によって、止
水機能が向上するのは、仮に僅かな隙間があっても、浸
入水が当該ポリマーに取り込まれるため、ケーブルジョ
イント部分の奥部まで達することは殆どないからであ
る。また、浸入水の取り込みによって、樹脂自体の体積
膨張が起こるため、より強固な樹脂の充填状態が得られ
るようになるからである。このことは、言い換えれば、
海底や河川中などの布設によって、ジョイント部分が水
中に曝されると、仮に樹脂硬化時の収縮などによって多
少の隙間があったり、隙間まで行かなくとも充填状態が
緩かったりした場合、水の浸入や働きかけによって、隙
間が塞がれたり、充填状態が強固(硬く)なるため、良
好な止水機能が得られることを意味する。もちろん、こ
の強固な充填状態によって、外部の応力に対しても大き
な抵抗力が得られ、歪みが生じ難く、やはり良好な止水
機能が得られる。[0009] The addition of the superabsorbent polymer improves the water stopping function because even if there is a slight gap, the infiltrated water is taken into the polymer, so that it is difficult to reach the inner part of the cable joint. Because there is little. In addition, the volume of the resin itself expands due to the infiltration of the infiltration water, so that a stronger resin filling state can be obtained. This means, in other words,
If the joints are exposed to water due to laying on the sea floor or in the river, if there is some gap due to shrinkage during resin curing, etc. This means that the gaps are closed or the filling state becomes strong (hard) due to the action, and that a good water stopping function is obtained. Of course, due to this strong filling state, a large resistance to external stress is obtained, distortion is unlikely to occur, and a good water stopping function is obtained.
【0010】なお、本発明の樹脂混和物には、もちろん
ベース樹脂用の硬化剤として、ポリオール、ポリアミ
ン、などが添加され、また、必要によってタール、炭酸
カルシウム、カーボンブラック、シリカなどの充填剤、
アミン系触媒などの硬化促進剤、可塑剤、乳化剤、加水
分解防止剤などの他の材料も添加することができる。The resin admixture of the present invention is added with polyol, polyamine, etc. as a curing agent for the base resin, and if necessary, fillers such as tar, calcium carbonate, carbon black, silica, etc.
Other materials such as a curing accelerator such as an amine catalyst, a plasticizer, an emulsifier, and a hydrolysis inhibitor can also be added.
【0011】[0011]
【実施例】次に、表1に示した配合による本発明のケー
ブルジョイント用止水樹脂混和物(実施例1〜5)と、
本発明の条件を欠く止水樹脂混和物(比較例1〜4)に
よって、ケーブルジョイント部分を製造し、止水機能
(特性)について調べた。そして、この止水特性も表1
に併記した。なお、ここで、止水特性はケーブルジョイ
ント部分の一端(片端)に5Kgf/cm2 の水圧を2
4時間掛け、浸入した水の浸入長さを測定して行った。EXAMPLES Next, a water-blocking resin admixture for cable joints of the present invention having the composition shown in Table 1 (Examples 1 to 5),
A cable joint portion was manufactured using a water-blocking resin admixture lacking the conditions of the present invention (Comparative Examples 1 to 4), and the water-blocking function (characteristic) was examined. Table 1 shows the water stopping characteristics.
It was also described in. In this case, the water stop performance is determined by applying a water pressure of 5 kgf / cm 2 to one end (one end) of the cable joint.
It took 4 hours to measure the infiltration length of the intruded water.
【0012】[0012]
【表1】 [Table 1]
【0013】上記表1から、本発明のケーブルジョイン
ト用止水樹脂混和物(実施例1〜5)では、良好な止水
特性が得られた。これに対して、高吸水性ポリマーが無
添加であったり、その添加量が不適切な本発明の条件を
欠く止水樹脂混和物(比較例1〜4)にあっては、浸入
水の長さが長く、ものによっては漏水したりして、止水
特性が不十分であり、また、高吸水性ポリマーの添加量
が多すぎると、加工性が悪化することが判る。From Table 1 above, the water-stopping resin admixture for cable joints of the present invention (Examples 1 to 5) showed good water-stopping properties. On the other hand, in the case of the water-blocking resin admixture (Comparative Examples 1 to 4) in which the superabsorbent polymer is not added or the amount of addition of the superabsorbent polymer is inadequate, the conditions of the present invention are insufficient. It can be seen that the water-stopping properties are insufficient due to the long water leakage, and that the processability is deteriorated if the amount of the superabsorbent polymer is too large.
【0014】[0014]
【発明の効果】このように本発明によると、ケーブルの
ジョイント部分に用いられる止水樹脂混和物に所定量の
高吸水性ポリマーを添加してあるため、仮に樹脂硬化時
の収縮などによって、若干の隙間が生じたり、樹脂充填
状態が緩い状態にあっても、浸入した水は、高吸水性ポ
リマーによって効果的に吸収される。また、この浸入水
の吸収によって、樹脂自体の体積膨張が起こり、隙間は
容易に消失するため、浸入水がジョイント内部の奥部ま
で達することは、殆どなくなる。この結果、極めて有効
な止水機能が得られる。さらに、樹脂自体の体積膨張が
あると、強固(硬い)な充填状態が得られため、外部か
らの応力に対しても、その抵抗力が強く、ジョイント部
分が歪み難くなるため、この点からも、極めて有効な止
水機能が得られる。また、このような高吸水性ポリマー
の作用から、樹脂硬化時の収縮などに対して、従来ほど
厳密に対処する必要がなくなるため、硬化温度を高めに
設定することが可能となり、作業性の向上も期待するこ
とができる。As described above, according to the present invention, since a predetermined amount of the superabsorbent polymer is added to the water-blocking resin admixture used for the joint portion of the cable, if the resin is hardened due to shrinkage during curing, etc. Even if a gap is formed or the resin filling state is loose, the water that has entered is effectively absorbed by the superabsorbent polymer. In addition, the absorption of the infiltration water causes volume expansion of the resin itself, and the gap easily disappears, so that the infiltration water hardly reaches the inside of the joint. As a result, an extremely effective water stopping function is obtained. Furthermore, if the resin itself expands in volume, a strong (hard) filling state is obtained, and the resistance to external stress is strong, and the joint portion is less likely to be distorted. An extremely effective water stopping function can be obtained. In addition, due to the action of the superabsorbent polymer, it is not necessary to deal with shrinkage during curing of the resin as strictly as before, so that the curing temperature can be set higher and the workability is improved. Can also be expected.
【図1】ケーブルジョイント部分を示した概略縦断面図
である。FIG. 1 is a schematic longitudinal sectional view showing a cable joint portion.
1 ケーブル 2 ジョイント部分 3 保護部材 4 止水樹脂混和物 DESCRIPTION OF SYMBOLS 1 Cable 2 Joint part 3 Protective member 4 Waterproof resin mixture
Claims (2)
止水樹脂混和物であって、ベース樹脂100重量部に高
吸水性ポリマーを10〜100重量部添加したことを特
徴とするケーブルジョイント用止水樹脂混和物。1. A water-blocking resin mixture for a cable, wherein the water-blocking resin admixture is obtained by adding 10 to 100 parts by weight of a superabsorbent polymer to 100 parts by weight of a base resin. Mixture.
無水マレイン酸であることを特徴とする請求項1記載の
ケーブルジョイント用止水樹脂混和物。2. The high water-absorbing polymer is isobutylene-
2. The water-blocking resin mixture for a cable joint according to claim 1, wherein the mixture is maleic anhydride.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9291658A JPH11106668A (en) | 1997-10-08 | 1997-10-08 | Water stop resin mixture for cable joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9291658A JPH11106668A (en) | 1997-10-08 | 1997-10-08 | Water stop resin mixture for cable joint |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11106668A true JPH11106668A (en) | 1999-04-20 |
Family
ID=17771795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9291658A Pending JPH11106668A (en) | 1997-10-08 | 1997-10-08 | Water stop resin mixture for cable joint |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11106668A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002302601A (en) * | 2001-04-03 | 2002-10-18 | Sumitomo Electric Ind Ltd | Resin composition containing thermoplastic polyurethane and heat-shrinkable tubing using the same |
KR20220006698A (en) * | 2020-07-09 | 2022-01-18 | 김병조 | Self-contraction type waterproof tube using super absorbent polymer |
-
1997
- 1997-10-08 JP JP9291658A patent/JPH11106668A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002302601A (en) * | 2001-04-03 | 2002-10-18 | Sumitomo Electric Ind Ltd | Resin composition containing thermoplastic polyurethane and heat-shrinkable tubing using the same |
KR20220006698A (en) * | 2020-07-09 | 2022-01-18 | 김병조 | Self-contraction type waterproof tube using super absorbent polymer |
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