JPH03122909A - Electric wire/cable - Google Patents
Electric wire/cableInfo
- Publication number
- JPH03122909A JPH03122909A JP25969389A JP25969389A JPH03122909A JP H03122909 A JPH03122909 A JP H03122909A JP 25969389 A JP25969389 A JP 25969389A JP 25969389 A JP25969389 A JP 25969389A JP H03122909 A JPH03122909 A JP H03122909A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- ethylene
- acrylic ester
- ester copolymer
- electric wire
- 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
- 229920001577 copolymer Polymers 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 239000011342 resin composition Substances 0.000 claims abstract description 8
- 229920006226 ethylene-acrylic acid Polymers 0.000 claims description 6
- 240000005572 Syzygium cordatum Species 0.000 abstract description 12
- 235000006650 Syzygium cordatum Nutrition 0.000 abstract description 12
- 239000012212 insulator Substances 0.000 abstract description 11
- -1 acrylic ester Chemical class 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 abstract description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 abstract description 4
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 abstract description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 abstract description 2
- 238000012690 ionic polymerization Methods 0.000 abstract description 2
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010526 radical polymerization reaction Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Organic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、耐水トリー性に優れた絶縁体層を有する電線
・ケーブルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to electric wires and cables having an insulating layer with excellent water resistance.
［従来の技術］
ポリエチレンに代表されるポリオレフィンあるいはエチ
レン系共重合体、並びにこれらの架橋物は、優れた電気
絶縁性を示すこと−から、電カケープルを中心とする電
気絶縁材料として広く用いられてきている。[Prior Art] Polyolefins such as polyethylene or ethylene copolymers, as well as crosslinked products thereof, have been widely used as electrical insulating materials, mainly for electrical cables, because they exhibit excellent electrical insulation properties. ing.
しかし、これらの材料を湿潤もしくは浸水状態で使用し
た場合、絶縁体中に水トリーが発生し、材料のもつ優れ
た電気絶縁性能が大きく低下するという問題がある。However, when these materials are used in a wet or submerged state, there is a problem in that water trees occur in the insulator, which significantly reduces the excellent electrical insulation performance of the materials.
すなわち、高圧用絶縁ケーブルの一般的構成は・図に示
すように導体１の上に内部半導電層２が、その外周に絶
縁体３が、そして当該絶縁体３の外周に外部半導電層４
が設けられた構造よりなるが、ボウタイ状水トリーが絶
縁体３の内部に発生するほか、界面水トリーが内部半導
電層２又は外部半導電層４より発生し、Ｉ＆悪の場合に
は絶縁体層３を貫通して絶縁破壊に至ることすらある。That is, the general structure of a high-voltage insulated cable is as shown in the figure: an internal semiconducting layer 2 on a conductor 1, an insulator 3 on the outer periphery of the conductor 1, and an outer semiconducting layer 4 on the outer periphery of the insulator 3.
However, in addition to a bowtie-shaped water tree generated inside the insulator 3, an interfacial water tree is generated from the inner semiconducting layer 2 or the outer semiconducting layer 4, and in the case of I&W, the insulation It may even penetrate the body layer 3 and lead to dielectric breakdown.
水トリーは絶縁体中のボイド、異物、並びに絶縁体と半
導電層界面の不整等の局所的高電界部に水が凝集するこ
とによって発生する。このため、電線・ケーブル絶縁体
中のこれらの欠陥を除去するため多くの努力が払われて
きており、レジンの品質管理や電線・ケーブル製造技術
の改善によって、水トリーの発生の抑止効果が向上して
きている。Water trees occur when water condenses in local high electric field areas such as voids in the insulator, foreign matter, and irregularities at the interface between the insulator and the semiconducting layer. Therefore, many efforts have been made to eliminate these defects in wire and cable insulation, and improvements in resin quality control and wire and cable manufacturing technology have improved the effectiveness of preventing water trees. I've been doing it.
［発明が解決しようとする課題］
しかし、各方面にわたる努力が重ねられているにも拘ら
ず、上記水トリーの発生を皆無にできる段階には到達し
ておらず、鋭意その発生の抑止対策についての検討が進
められている。[Problem to be solved by the invention] However, despite repeated efforts in various fields, we have not yet reached the stage where the occurrence of the above-mentioned water tree can be completely eliminated, and efforts are being made to take measures to prevent its occurrence. is currently being considered.
本発明の目的は、上記したような実情にかんがみ、水ト
リーの発生を大巾に抑止し得る絶縁体を有してなる新規
な電線・ケーブルを提供しようとするものである。SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a new electric wire/cable having an insulator that can significantly suppress the occurrence of water trees.
［課題を解決するための手段］
本発明は、電線・ケーブルの絶縁体として、融点が１１
５°Ｃ以上の直鎖状エチレン−アクリル酸エステル共重
合体を主体とする樹脂組成物を使用し、それによって耐
水トリー性を大［１１に向上させたものである。[Means for Solving the Problems] The present invention provides an electric wire/cable insulator that has a melting point of 11.
A resin composition mainly composed of a linear ethylene-acrylic acid ester copolymer having a temperature of 5°C or higher is used, thereby improving the water resistance to a large degree [11].
ここにいう融点１１５℃以上のエチレン−アクリル酸エ
ステル共重合体とは、従来の高圧ラジカル法と異なり、
低圧イオン重合法により製造したものである。The ethylene-acrylic acid ester copolymer with a melting point of 115°C or higher is different from the conventional high-pressure radical method,
It was manufactured using a low-pressure ionic polymerization method.
アクリル酸エステルとしては、例えばアクリル酸メチル
、アクリル酸エチル、アクリル酸プロピル、アクリル酸
ブチルなとがあり、本発明においては特に規定はしない
、その代表的なものとして、アクリル酸エチルを挙げる
ことができる。Examples of acrylic esters include methyl acrylate, ethyl acrylate, propyl acrylate, and butyl acrylate, which are not particularly specified in the present invention, but ethyl acrylate is a typical example thereof. can.
この方法により製造したポリマは、直鎖状の分子構造を
有し、従来の長鎖分岐を持つものとは異なる。The polymer produced by this method has a linear molecular structure, unlike conventional long-chain branched polymers.
その結果、結晶性が高くなり、従来のものの融点が９０
〜１００℃であったのと比べると２０℃以上上昇する。As a result, the crystallinity becomes higher, and the melting point of the conventional one is 90.
This is an increase of more than 20°C compared to 100°C.
このエチレン−アクリル酸エステル共重合体を主体とす
る樹脂組成物を用いることにより、耐ボウタイトリー性
が著しく改善されることが見出された。It has been found that by using a resin composition mainly composed of this ethylene-acrylic acid ester copolymer, the bow tie resistance is significantly improved.
直鎖状のエチレン−アクリル酸エステル共重合体には、
配合剤としてポリエチレンやポリプロピレン、ポリブテ
ンのようなポリオレフィンなどのポリマをブレンドして
も差支えない、また、適宜酸化防止剤、滑剤、あるいは
ケイ酸マグネシウムやケイ酸アルミニウムなどの充填剤
を加えてもよい。Linear ethylene-acrylic acid ester copolymer has
Polymers such as polyolefins such as polyethylene, polypropylene, and polybutene may be blended as compounding agents, and antioxidants, lubricants, or fillers such as magnesium silicate and aluminum silicate may be added as appropriate.
直鎖状のエチレン−アクリル酸エステル共重合体を主体
とする樹脂組成物は、導体外周に直接あるいは半導電層
を介して被覆され、架橋あるいは非架橋の電気絶縁層を
形成する。架橋する場合は、ジクミルパーオキサイド、
２．５−ジメチル−２゜５−ジ（ｔ−ブチルパーオキシ
）ヘキシン−３に代表されるパーオキサイドを用いて加
熱架橋するのが一般である。A resin composition mainly composed of a linear ethylene-acrylic acid ester copolymer is coated on the outer periphery of a conductor directly or via a semiconductive layer to form a crosslinked or non-crosslinked electrical insulating layer. For crosslinking, dicumyl peroxide,
It is common to carry out thermal crosslinking using a peroxide typified by 2,5-dimethyl-2°5-di(t-butylperoxy)hexyne-3.
その他、ビニルトリエトキシシランのような有機シラン
をポリマにグラフトし、水分と接触させてシラノール縮
合触媒によりシランを縮合させて架橋させるいわゆるシ
ラン水架橋、あるいは、電子線のような電離性放射線の
照射による架橋でも良い。Other methods include so-called silane water crosslinking, in which an organic silane such as vinyltriethoxysilane is grafted onto a polymer, brought into contact with moisture, and the silane is condensed and crosslinked using a silanol condensation catalyst, or irradiation with ionizing radiation such as electron beams. It may also be crosslinked by
［実施例］
以下に、本発明について実施例および比較例をもって説
明する。[Example] The present invention will be described below with reference to Examples and Comparative Examples.
エチレン−アクリル酸エチルを代表的に取上げ、第１表
の各側に示、す成分を配合した樹脂組成物をｙＡ整した
。Taking ethylene-ethyl acrylate as a representative example, a resin composition containing the components shown on each side of Table 1 was prepared.
外径３市の導体上に厚さ０．５間のポリエチレン系半導
電層と共に上記樹脂組成物を厚さ２止になるように押出
被覆し、引続き窒素ガスを熱媒体とした乾式架橋管内で
架橋して絶縁電線を製造した。The above resin composition was extruded and coated on a conductor with an outer diameter of 3 mm along with a polyethylene semiconductive layer with a thickness of 0.5 mm to a thickness of 2 mm, and then in a dry cross-linked pipe using nitrogen gas as a heating medium. Crosslinking was performed to produce an insulated wire.
この絶縁電線を水中に浸漬し、５０ Ｈｚ、３ｋｖの交
流電圧を１８ケ月課重し、絶縁体中に発生した０、２止
以上の水トリーを数えた。This insulated wire was immersed in water, and an AC voltage of 50 Hz and 3 kV was applied for 18 months, and water trees of 0, 2 or more occurring in the insulator were counted.
評価結果を第１表の下欄に示した。The evaluation results are shown in the lower column of Table 1.
本発明に係る融点の高いエチレン−アクリル酸エチル共
重合体を主体としている実施例１〜３は、いずれも水ト
リーの発生個数が大巾に低減している。In Examples 1 to 3, which are mainly composed of the ethylene-ethyl acrylate copolymer having a high melting point according to the present invention, the number of water trees generated is greatly reduced.
これに対し、融点の低いエチレン−アクリル酸エチル共
重合体を主体としている比較例１および２は、水トリー
の発生個数が格段に多く、その対比によって、本発明の
有用性が端的に実証されているということができる。On the other hand, in Comparative Examples 1 and 2, which were mainly composed of ethylene-ethyl acrylate copolymer with a low melting point, the number of water trees generated was significantly higher, and this comparison clearly demonstrated the usefulness of the present invention. It can be said that
［発明の効果］
以上の通り、本発明に係る電線・ゲーブルによれば、耐
水トリー性を従来例に比較して大中に向上させることが
できるものであり、実布設における信頼性を向上させ得
る意義は大きい。[Effects of the Invention] As described above, according to the electric wire/gable according to the present invention, the water resistance can be improved in comparison with the conventional example, and the reliability in actual installation can be improved. The significance of what you get is great.
図は、絶縁ケーブルの具体的構成を示す断面図である。 １：導体、 ２：内部半導電層、 ３：絶縁体、 ４：外部半導電層。 The figure is a sectional view showing a specific configuration of an insulated cable. 1: conductor, 2: internal semiconducting layer, 3: Insulator, 4: Outer semiconducting layer.
Claims (1)
酸エステル共重合体を主体とする樹脂組成物からなる電
気絶縁層を有してなる電線・ケーブル。(1) An electric wire/cable having an electrical insulating layer made of a resin composition mainly composed of a linear ethylene-acrylic acid ester copolymer having a melting point of 115° C. or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25969389A JPH03122909A (en) | 1989-10-04 | 1989-10-04 | Electric wire/cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25969389A JPH03122909A (en) | 1989-10-04 | 1989-10-04 | Electric wire/cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03122909A true JPH03122909A (en) | 1991-05-24 |
Family
ID=17337613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25969389A Pending JPH03122909A (en) | 1989-10-04 | 1989-10-04 | Electric wire/cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03122909A (en) |
-
1989
- 1989-10-04 JP JP25969389A patent/JPH03122909A/en active Pending
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