JPH01606A - Watertight insulated wire/cable - Google Patents
Watertight insulated wire/cableInfo
- Publication number
- JPH01606A JPH01606A JP62-156176A JP15617687A JPH01606A JP H01606 A JPH01606 A JP H01606A JP 15617687 A JP15617687 A JP 15617687A JP H01606 A JPH01606 A JP H01606A
- Authority
- JP
- Japan
- Prior art keywords
- watertight
- ethylene
- copolymer
- conductor
- cables
- 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
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 8
- 230000003449 preventive effect Effects 0.000 claims description 8
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 claims description 6
- 239000012964 benzotriazole Substances 0.000 claims description 5
- 229920001038 ethylene copolymer Polymers 0.000 claims description 5
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000004020 conductor Substances 0.000 description 21
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 238000004132 cross linking Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000002845 discoloration Methods 0.000 description 5
- 229920003020 cross-linked polyethylene Polymers 0.000 description 4
- 239000004703 cross-linked polyethylene Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、水分の侵入による導体腐蝕の発生を防止する
ようにした水密絶縁電線・ケーブルに関するものである
。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to watertight insulated electric wires and cables that prevent corrosion of conductors due to moisture intrusion.
〈従来の技術〉
近年、撚線導体への水分の侵入による導体腐蝕の発生を
防ぐために、水密コンパウンドを充填した水密絶縁電線
・ケーブルが多用されてきている。<Prior Art> In recent years, watertight insulated electric wires and cables filled with a watertight compound have been widely used in order to prevent conductor corrosion due to moisture intrusion into stranded conductors.
従来のこのような水密絶縁電線・ケーブルの場合、水密
コンパウンドとして、撚線導体間への充填性がよく、か
つ導体への接着性もよい、エチレン−酢酸ビニル共重合
体（ＥｖＡ）、エチレン−エチルアクリレート共重合体
（ＥＥＡ）、エチレン−メチルメタアクリレート共重合
体（Ｅ−ＭＭＡ）、あるい↓よこれらのマレイン酸変性
ポリマーであるエチレン系共重合体が主に使用されてい
る。In the case of conventional watertight insulated wires and cables, ethylene-vinyl acetate copolymer (EvA) and ethylene-vinyl acetate copolymer (EvA), which have good filling properties between stranded wire conductors and good adhesion to conductors, are used as watertight compounds. Ethyl acrylate copolymers (EEA), ethylene-methyl methacrylate copolymers (E-MMA), and ethylene copolymers which are maleic acid-modified polymers of these are mainly used.
また、絶縁体としては、使用目的に応じて、ポリエチレ
ン（ＰＥ）、架橋ポリエチレン（ＸＬＰＥ）、ＢＰゴム
等を用いられている。Further, as the insulator, polyethylene (PE), crosslinked polyethylene (XLPE), BP rubber, etc. are used depending on the purpose of use.
〈発明が解決しようとする問題点〉
ところが、このような従来の水密絶縁電線・ケーブルに
おいて、特に、架橋工程の必要とされるＸＬＰＥやＥＰ
ゴム絶縁電線・ケーブルの場合、架橋温度を高（すると
、例えばＥＶＡのように高温加熱により遊離酸を発生さ
せ易い水密コンパウンドでぼ、この遊離酸の作用により
、製造工程中に導体変色が起こる。<Problems to be solved by the invention> However, in such conventional watertight insulated wires and cables, especially XLPE and EP which require a crosslinking process are
In the case of rubber insulated wires and cables, if the crosslinking temperature is high (for example, in a watertight compound such as EVA which easily generates free acid when heated at high temperature), conductor discoloration occurs during the manufacturing process due to the action of this free acid.
また、上記従来のような水密絶縁電線・ケーブルであっ
ても、ヒ、−トサイクルや種々の屈曲が繰り返えして力
ｉわるような厳しい環繊下で使用される場合、僅かなが
ら水分の侵入が生じ易（、導体腐蝕の原因となる。つま
り、このように厳しい使用条件によっては、より完全な
導体腐蝕対策を施した水密絶縁電線・ケーブルが要求さ
れる。In addition, even with the conventional watertight insulated wires and cables mentioned above, when used under severe conditions such as heat cycles and repeated bending, it is important to note that even a small amount of water may accumulate in the wires and cables. In other words, under such severe usage conditions, watertight insulated wires and cables with more complete measures against conductor corrosion are required.
本発明は、このような従来の実情に漏みてなされたもの
である。The present invention has been made in view of these conventional circumstances.
〈問題点を解決するための手段及びその作用〉か−る本
発明の特徴とする点は、水密コンパウンドが、エチレン
−酢酸ビニル共重合体（ＥＶＡ）、エチレレーエチルア
クリレート共重合体（ＥＥＡ） 、エチレン−メチルメ
タアクリレート共重合体（Ｅ−ＭＭＡ） 、あるいはこ
れらのマレイン酸変性ポリマーであるエチレン系共重合
体と、０．５〜５．０重量％のベンゾトリアゾール（Ｂ
ＴＡ）またはこのベンゾトリアゾール系の防錆剤とから
なる水密絶縁電線・ケーブルにある。<Means for Solving the Problems and Their Effects> The characteristic feature of the present invention is that the watertight compound is made of ethylene-vinyl acetate copolymer (EVA) or ethylene-ethyl acrylate copolymer (EEA). , ethylene-methyl methacrylate copolymer (E-MMA), or an ethylene copolymer which is a maleic acid-modified polymer of these and 0.5 to 5.0% by weight of benzotriazole (B
TA) or this benzotriazole-based rust preventive agent.
本発明において、水密コンパウンドのベース材料として
、ＥＶＡ、ＥＥＡ、Ｅ−ＭＭＡ、あるいはこれらのマレ
イン酸変性ポリマーであるエチレン系共重合体を用いる
のは、これらの樹脂の場合、撚線導体間への充填性、お
よび導体への密着性（接若性）が良好なのに加え、上記
防錆剤との相溶性がよいからである。このエチレン系共
重合体の使用により、防錆剤のブリードは発生しにくく
、電線・ケーブルあ製造加工上極めて有益である。In the present invention, the reason why EVA, EEA, E-MMA, or an ethylene copolymer which is a maleic acid-modified polymer of these resins is used as the base material of the watertight compound is that in the case of these resins, it is difficult to bond between stranded conductors. This is because it not only has good filling properties and adhesion to conductors (adhesiveness), but also has good compatibility with the rust preventive agent. By using this ethylene copolymer, bleeding of the rust preventive agent is less likely to occur, which is extremely useful in the manufacturing process of electric wires and cables.
また、防錆剤として用いるＢＴＡまたはこの誘導体は、
防錆機能に優れており、その添加量を０．５〜５．０重
量％の範囲としたのは、０．５重量％未満では、十分な
導体の腐蝕防止効果が得られず、また５、０重量％を越
えると、導体の腐蝕防止効果が飽和するだけでなく、水
密コンパウンド中から防錆剤がブリードするようになり
、製造加工上の問題が生じるようになるからである。In addition, BTA or its derivatives used as a rust preventive agent are
It has an excellent rust prevention function, and the reason why the amount added is in the range of 0.5 to 5.0% by weight is because if it is less than 0.5% by weight, a sufficient effect of preventing corrosion of the conductor cannot be obtained. If the amount exceeds 0% by weight, not only the corrosion preventing effect of the conductor will be saturated, but also the rust preventive will bleed out from the watertight compound, causing problems in manufacturing and processing.
なお、本発明の電線・ケーブルにおいて、用いる絶縁体
材料としては、ＰＥ、、ＸＬＰＥ、ＥＰゴム等が存効で
ある。なぜなら、これらの樹脂の場合、水密コンパウン
ドとの接着性もよく、良好な水密性能が得られるからで
ある。In addition, in the electric wire/cable of the present invention, PE, XLPE, EP rubber, etc. are used as the insulating material. This is because these resins have good adhesion to watertight compounds and provide good watertight performance.
また、本発明で用いる水密コンパウンドには、必要によ
り、所定量の老化防止剤、架橋剤、カーボンブラック、
無機充填剤等を添加することができる。In addition, the watertight compound used in the present invention may optionally contain a predetermined amount of anti-aging agent, cross-linking agent, carbon black,
Inorganic fillers and the like can be added.
〈実施例〉
実施例Ｉ
ＥＶＡ （酢酸ビニル含有量＝２８％、メルトインデッ
クス＝１２０）に１重量％の防錆剤ＢＴＡを添加した水
密コンパウンド（所定量の老化防止剤、カーボンブラッ
グを含む）を導体断面積１２５ｎ＋ｍ”の撚線導体間に
充填させ、この導体上に厚さ２．５ｍｍの絶縁体ＸＬＰ
Ｅを被覆して水密絶縁電線を得た。<Example> Example I A watertight compound (containing a predetermined amount of anti-aging agent, carbon brag) in which 1% by weight of the rust inhibitor BTA was added to EVA (vinyl acetate content = 28%, melt index = 120) was prepared. It is filled between stranded conductors with a conductor cross-sectional area of 125n+m", and an insulator XLP with a thickness of 2.5mm is placed on this conductor.
E was coated to obtain a watertight insulated wire.
比較例１
上記実施例１の水密コンパウンドに防錆剤ＢＴＡを含め
ない同構造の水密絶縁電線を得た。、これらの実施例１
および比較例１の水密絶縁電線において、絶縁体の架橋
温−度は通常２００°Ｃであるが、架橋効率の向上によ
る製造線速の高速化も考慮して、架橋温度２５０°Ｃの
場合も実施した。Comparative Example 1 A watertight insulated electric wire having the same structure as in Example 1 was obtained, except that the rust preventive agent BTA was not included in the watertight compound. , these Example 1
In the watertight insulated wire of Comparative Example 1, the crosslinking temperature of the insulator is usually 200°C, but in consideration of increasing the manufacturing wire speed due to improved crosslinking efficiency, the crosslinking temperature may be 250°C. carried out.
その結果、架橋温度２００″Ｃでは、実施例１、比較例
１共に、製造直後に導体の変色を認められなかったが１
、架橋温度２５０℃では、比較例１の場合、ＥＶＡの遊
離酸によると推測される導体の変色が認められたのに対
して、実施例１では何らの変色も認められなかった。As a result, at a crosslinking temperature of 200''C, no discoloration of the conductor was observed immediately after production in both Example 1 and Comparative Example 1, but 1
At a crosslinking temperature of 250° C., discoloration of the conductor was observed in Comparative Example 1, which was presumed to be due to free acid of EVA, whereas in Example 1, no discoloration was observed.
また、上記架橋温度２００ ”Ｃで得られた水密絶縁電
線を１５倍径で１０回屈曲させた後、これに−１０″Ｃ
Ｘ１２ｈｒ 〜６０°ＣＸ１２ｈｒのヒートサイクルを
１週間行なった。In addition, after bending the watertight insulated wire obtained at the above-mentioned crosslinking temperature of 200"C 10 times at 15 times the diameter, the wire was bent at -10"C.
A heat cycle of X12hr to 60° C.X12hr was performed for one week.
上記処理を行った電線を長さ１ｍで切断し、役Ｈ，ＯＨ
水溶液（ＮＨ，＋イオン：５’００ ｐ ｐｍ）中に１
週間浸漬した。 ゛
この場合、各電線片端からの水溶液の侵入距離は、実施
例１、比較例１共に１５ｃｍであったが、比較例１では
導体腐蝕が認められたのに対して、実施例１では導体腐
蝕は認められなかった。Cut the electric wire that has undergone the above treatment into a length of 1 m, and
1 in aqueous solution (NH, + ion: 5'00 pp pm)
Soaked for a week.゛In this case, the intrusion distance of the aqueous solution from one end of each wire was 15 cm in both Example 1 and Comparative Example 1. In Comparative Example 1, conductor corrosion was observed, whereas in Example 1, conductor corrosion was observed. was not recognized.
〈発明品効果〉
このように本発明によれば、エチレン系共重合体をベー
ス材料とした水密コンパウンドに、ＢＴＡまたはこのＢ
ＴＡ系の防錆剤を添加することにより、製造時に高温の
加工条件が加わる場合であっても、導体変色を防ぐこと
ができ、またヒートサイクルや繰り返しの屈曲が加えら
れる厳しい環境下での使用においても、導体への僅かな
水分の侵入による導体腐蝕の起こらない優れた水密絶縁
電線・ケーブルを堤供することができる。<Effects of the invention> As described above, according to the present invention, BTA or this B
By adding a TA-based rust preventive agent, it is possible to prevent conductor discoloration even when high-temperature processing conditions are applied during manufacturing, and it can also be used in harsh environments where heat cycles and repeated bending are applied. Also, it is possible to provide excellent watertight insulated electric wires and cables that do not suffer from conductor corrosion due to the intrusion of a small amount of moisture into the conductors.
Claims (1)
ＷＶＡ）、エチレン−エチルアクリレート共重合体（Ｅ
ＥＡ）、エチレン−メチルメタアクリレート共重合体（
Ｅ−ＭＭＡ）、あるいはこれらのマレイン酸変性ポリマ
ーであるエチレン系共重合体と、０．５〜５．０重量％
のベンゾトリアゾール（ＢＴＡ）またはベンゾトリアゾ
ール系の防錆剤とからなる水密絶縁電線・ケーブル。The watertight compound is made of ethylene-vinyl acetate copolymer (
WVA), ethylene-ethyl acrylate copolymer (E
EA), ethylene-methyl methacrylate copolymer (
E-MMA) or an ethylene copolymer which is a maleic acid-modified polymer of these, and 0.5 to 5.0% by weight.
Watertight insulated wires and cables made of benzotriazole (BTA) or a benzotriazole-based rust preventive agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-156176A JPH01606A (en) | 1987-06-23 | Watertight insulated wire/cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-156176A JPH01606A (en) | 1987-06-23 | Watertight insulated wire/cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS64606A JPS64606A (en) | 1989-01-05 |
| JPH01606A true JPH01606A (en) | 1989-01-05 |
Family
ID=
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