JPS61109206A - Electric insulator and electric cable using the same - Google Patents
Electric insulator and electric cable using the sameInfo
- Publication number
- JPS61109206A JPS61109206A JP59229961A JP22996184A JPS61109206A JP S61109206 A JPS61109206 A JP S61109206A JP 59229961 A JP59229961 A JP 59229961A JP 22996184 A JP22996184 A JP 22996184A JP S61109206 A JPS61109206 A JP S61109206A
- Authority
- JP
- Japan
- Prior art keywords
- electric
- polyolefin
- weight
- parts
- cable
- 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
- 239000003989 dielectric material Substances 0.000 title 1
- 229920000098 polyolefin Polymers 0.000 claims description 16
- 239000011810 insulating material Substances 0.000 claims description 10
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000012772 electrical insulation material Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 240000005572 Syzygium cordatum Species 0.000 description 8
- 235000006650 Syzygium cordatum Nutrition 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229920000578 graft copolymer Polymers 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
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】
（発明の技術分野）
本発明は電気絶縁材およびこれを用いた電気ケーブルに
係り、特に浸水課電劣化を低減するのに好適な電気絶縁
材およびこれを用いた電気ケーブルに関する、
（発明の技術的背景及びその問題点）
電気ケーブルが運転時に浸水状態におかれると、電気ケ
ーブルの電気絶縁材が浸水によって劣化する。この浸水
劣化は、特に電気絶縁材が電界下におかれているときに
非常に促進される傾向にある。Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to an electrical insulating material and an electrical cable using the same, and particularly to an electrical insulating material suitable for reducing deterioration caused by flooding due to electricity, and an electrical cable using the same. Regarding cables (Technical background of the invention and problems thereof) When an electric cable is submerged in water during operation, the electrical insulation material of the electric cable deteriorates due to the submergence of water. This water immersion deterioration tends to be accelerated particularly when the electrical insulating material is placed under an electric field.
また、浸水下の課電劣化現象は、電気絶縁材内部のボイ
ドや異物により発生するボウタイトリーと呼ばれる水ト
リーの発生に起因することが知られている。したがって
、電気ケーブルの運転状態を安定にするためには、電気
絶縁材中に発生する水トリー七抑止することが必要であ
る。Furthermore, it is known that the phenomenon of electrical deterioration under water immersion is caused by the occurrence of water trees called bow-trees, which are generated by voids and foreign objects inside the electrical insulating material. Therefore, in order to stabilize the operating condition of the electric cable, it is necessary to suppress water trees generated in the electric insulation material.
加することが知られているが、実用上加工性および経済
性の両者を満足させるものはなかった。However, there has been no one that satisfies both processability and economy in practical terms.
（発明の目的〕
本発明は上記に鑑みなさｆＬ次もので、その目的とする
ところは、水トリーの発生を著しく低減し、かつ、加工
安定性も改善することができる電気絶縁材およびこｒＬ
ヲ用いた電気ケーブル金提供することにある。(Object of the Invention) In view of the above, the present invention aims to provide an electrical insulating material that can significantly reduce the occurrence of water trees and improve processing stability.
Our goal is to provide you with the electrical cables you need.
（発明の概要）
本発明の第１の特徴は電気絶縁材がポリオレフィン１０
０！’量部にエチレン−メチルメタアクリレート共重合
体ヲ０．５〜１０重量部添加してなるポリオレフィン組
成物からなることであり、第２の特徴は導体上に電気絶
縁材層を有する電気ケーーブルにおいて、前記電気絶縁
材１ｉｆｔ？、ポリオレフィン１００重量部に、エチレ
ン−メチルメタアクリレート共重合体ヲ０．５〜１０］
ｉ量部添加してなるポリオレフィン組成物で形成するこ
とである。(Summary of the Invention) The first feature of the present invention is that the electrical insulation material is polyolefin 10
0! The second feature is that the composition is made of a polyolefin composition in which 0.5 to 10 parts by weight of ethylene-methyl methacrylate copolymer is added to 1 part by weight. , the electrical insulation material 1ift? , 100 parts by weight of polyolefin, 0.5 to 10 parts of ethylene-methyl methacrylate copolymer]
i part of the polyolefin composition.
本発明のペースポリマーとして使用するポリオレフィン
としてはポリエチレン（ＰＥ）、エチレン−酢酸ビニル
共重合体、エチレン−エチルアクリレート共重合体、エ
チレン−メチルアクリレート共重合体、エチレン−エチ
ルメタアクリレート共重合体、エチレン−アクリル酸共
重合体、エチレン−１−ブテン共重合体、エチレン−Ｎ
−ビニルカルバソール共重合体、エチレン−散散ビニル
グラフトポリマー、ポリエチレン−ブチルゴムグラフト
ポリマー、ポリプロピレンなどが挙げられる。Polyolefins used as the pace polymer of the present invention include polyethylene (PE), ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene -acrylic acid copolymer, ethylene-1-butene copolymer, ethylene-N
Examples include -vinyl carbazole copolymer, ethylene-dispersed vinyl graft polymer, polyethylene-butyl rubber graft polymer, and polypropylene.
なお、ポリオレフイン１ｏｏ重量部に添加するエチレン
−メチルメタアクリレート共重合体（以下ＥＭＭＡと略
す〕の添加量’をｏ、 ｓ〜１０重量部と規定した、そ
の理由はＥＭＭＡの添加量が０．５重量部未満では、水
トリー抑制効果が半減するので好ましくなく、また１０
！ｔｆｔ［ｌ越えると、電気特性に悪影響を与え、又電
気絶縁材の吸水量が増加しかつ、水トリー発生の抑制効
果がそれほど増大しないからである。The amount of ethylene-methyl methacrylate copolymer (hereinafter abbreviated as EMMA) added to 10 parts by weight of polyolefin was defined as o,s~10 parts by weight, because the amount of EMMA added was 0.5 parts by weight. If it is less than 10 parts by weight, the water tree suppression effect will be halved, which is undesirable.
! This is because if it exceeds tft[l, the electrical characteristics will be adversely affected, the amount of water absorbed by the electrical insulating material will increase, and the effect of suppressing water tree generation will not increase significantly.
本発明ノポリオレフイン組成物は、ポリオレフィンの組
成配合時にＥＭＭＡをポリオレフィンに混入して混練す
ること等により得られるが、いずれにしても混線時に異
物の混入をされるようにするのが好まし込。The polyolefin composition of the present invention can be obtained by mixing EMMA into the polyolefin and kneading it at the time of blending the composition of the polyolefin, but in any case, it is preferable to prevent foreign matter from being mixed in at the time of mixing.
尚、上記ポリオレフィン組成物に有機過酸化物、酸化防
止剤、充填剤、着色剤、加工助剤などを加え５るように
してもよいことはいうででもなく、これによって耐水ト
リー効果が低下することはない。It goes without saying that organic peroxides, antioxidants, fillers, colorants, processing aids, etc. may be added to the polyolefin composition, but this will reduce the water-resistant tree effect. Never.
また、本発明の電気絶縁体は、テープ状あるいはシート
状にしてケーブルの接続部、ケーブルノ端末部あるいは
゛α気機器へのケーブル、ｖｔｍ）ｉ続部の形成にも利
用できる。Furthermore, the electrical insulator of the present invention can be used in the form of a tape or sheet to form a cable connection part, a cable terminal part, or a connection part of a cable to an air appliance.
（発明の実施例）
以下、本発令の実施例上図面に基づいて説明する。第１
図において、直径１．２間の導体１上に内厚の電気絶縁
材層６を形成する。しかしてこの上に外部中４電Ｎ４お
よびシース５を順次設けて本発明に係る電気ケーブル？
得る。得られた電気ケーブルについて下記の測定方法に
より各種試験を行った。すなわち、まず電気ケーブルの
オリジナルの交流破壊電圧および体積固有抵抗を測定す
る。(Embodiments of the Invention) Hereinafter, embodiments of the present proclamation will be described based on the drawings. 1st
In the figure, a layer of electrically insulating material 6 of internal thickness is formed on the conductor 1 with a diameter of 1.2 mm. However, the electric cable according to the present invention can be constructed by sequentially providing the outer inner four electric wires N4 and the sheath 5 on the lever.
obtain. Various tests were conducted on the obtained electric cable using the following measurement methods. That is, first, the original AC breakdown voltage and volume resistivity of the electric cable are measured.
次に第２図に示すよ５に長さ１ｍの電気ケーブル６をＵ
字状に折り曲げこの中央部７５０ｏ＋ｓ’ｊｚ室温水８
中に°浸漬し、電気ケーブルの一端９にＡ Ｃ５゜６
Ｋ’／ （１０００Ｈｚ ）の電圧ｔ２０００１１Ｅｐ
間印加し、その後電気ケーブルの交流破壊電圧、体積固
有抵抗、水分量、水トリー発生数および水トリー最大炎
を測定する。それらの結果は下表に示す通りである。Next, as shown in FIG.
Fold it into a letter shape.The center part is 750o + s'jz room temperature water 8.
Immerse it in the AC5°6 at one end of the electrical cable.
K'/ (1000Hz) voltage t200011Ep
Afterwards, measure the AC breakdown voltage, volume resistivity, water content, number of water tree occurrences, and maximum water tree flame of the electric cable. The results are shown in the table below.
切下≦′−ｄ・
（分明の効果）
以上説明し、たように、本発明によれば、水トリーの発
生を著１７ぐ抑制低減させることができ、浸水下での課
電劣化が大幅に低域するという顕著な効ＪｊＪを有（２
、かつ非吸水性、熱安定性にも優れている。Cut down ≦'-d・ (Effect of clarity) As explained above, according to the present invention, the occurrence of water trees can be significantly suppressed and reduced by 17 times, and the deterioration caused by the application of electricity under water submergence can be significantly reduced. It has a remarkable effect of low frequency JjJ (2
It also has excellent non-water absorption and thermal stability.
第１図に本発明の電気ケーブルの一実施例を示す断面図
、第２図は′ｂ学ケーブルの浸水課電試験の状況を示す
卿明図である
１・・・−・−・・−・・・−・・・・・・・・ 導体
６・・・・・・・・・・・・・・・・・・・・・・−・
電気絶縁材層θ・
代理人弁理士 山 １）明 信゛ −第１図
第 ２ ごFig. 1 is a cross-sectional view showing one embodiment of the electric cable of the present invention, and Fig. 2 is a schematic diagram showing the situation of the submergence electrification test of the cable.・・・－・・・・・・・・・ Conductor 6・・・・・・・・・・・・・・・・・・・・・・・・
Electrical insulating material layer θ・Representative Patent Attorney Yama 1) Shin Akira - Figure 1, Figure 2
Claims (1)
タアクリレート共重合体を０．５〜１０重量部添加して
なるポリオレフィン組成物からなることを特徴とする電
気絶縁材。 ２、ポリオレフィンがポリエチレンである特許請求の範
囲第１項記載の電気絶縁材。 ３、導体上に電気絶縁材層を有する電気ケーブルにおい
て、前記電気絶縁材層を、ポリオレフィン１００重量部
に、エチレン−メチルメタアクリレート共重合体を０．
５〜１０重量部添加してなるポリオレフィン組成物で形
成することを特徴とする電気ケーブル。 ４、ポリオレフィンがポリエチレンである特許請求の範
囲第３項記載の電気ケーブル。[Scope of Claims] 1. An electrical insulating material comprising a polyolefin composition prepared by adding 0.5 to 10 parts by weight of an ethylene-methyl methacrylate copolymer to 100 parts by weight of a polyolefin. 2. The electrical insulation material according to claim 1, wherein the polyolefin is polyethylene. 3. In an electric cable having an electrical insulating material layer on a conductor, the electrical insulating material layer is made of 100 parts by weight of polyolefin and 0.0 parts by weight of ethylene-methyl methacrylate copolymer.
An electric cable characterized in that it is formed from a polyolefin composition containing 5 to 10 parts by weight. 4. The electric cable according to claim 3, wherein the polyolefin is polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59229961A JPS61109206A (en) | 1984-10-31 | 1984-10-31 | Electric insulator and electric cable using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59229961A JPS61109206A (en) | 1984-10-31 | 1984-10-31 | Electric insulator and electric cable using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61109206A true JPS61109206A (en) | 1986-05-27 |
Family
ID=16900417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59229961A Pending JPS61109206A (en) | 1984-10-31 | 1984-10-31 | Electric insulator and electric cable using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61109206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019021556A (en) * | 2017-07-20 | 2019-02-07 | 住友電気工業株式会社 | Power cable |
| JP2020087798A (en) * | 2018-11-28 | 2020-06-04 | 住友電気工業株式会社 | Power cable |
-
1984
- 1984-10-31 JP JP59229961A patent/JPS61109206A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019021556A (en) * | 2017-07-20 | 2019-02-07 | 住友電気工業株式会社 | Power cable |
| JP2020087798A (en) * | 2018-11-28 | 2020-06-04 | 住友電気工業株式会社 | Power cable |
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