JPH0126128B2 - - Google Patents
Info
- Publication number
- JPH0126128B2 JPH0126128B2 JP58144677A JP14467783A JPH0126128B2 JP H0126128 B2 JPH0126128 B2 JP H0126128B2 JP 58144677 A JP58144677 A JP 58144677A JP 14467783 A JP14467783 A JP 14467783A JP H0126128 B2 JPH0126128 B2 JP H0126128B2
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- monomer containing
- vinyl monomer
- electric wire
- conductor
- 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
Links
- 239000000203 mixture Substances 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 8
- 125000004185 ester group Chemical group 0.000 claims description 6
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 5
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 229920006158 high molecular weight polymer Polymers 0.000 claims description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims 1
- 240000005572 Syzygium cordatum Species 0.000 description 6
- 235000006650 Syzygium cordatum Nutrition 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 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
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Description
〔発明の背景と目的〕
本発明は、架橋ポリエチレンの絶縁組成物を被
覆形成した電線・ケーブルに関するものである。
架橋ポリエチレンは、絶縁性や耐熱性にすぐれ
た特徴をもつているところから、電線・ケーブル
の絶縁体として多く用いられている。
しかし、近年、浸水状態で課電を行つた場合、
水トリーが発生し、電気的な絶縁劣化が進行する
ことが認められている。そして、今後も架橋ポリ
エチレンケーブルは地中埋設など浸水環境下にお
ける使用が進むことになるので、この水トリーを
抑制することが重要な課題となつている。
そして、この問題については、既に各方面で種
種と研究がなされており、その対策として、例え
ば、(1)エチレンビニルアセテートコポリマを単独
あるいはブレンドして用いる方法。(2)特殊な酸化
防止剤やエステル基含有添加剤を添加する方法、
等が提案されている。しかし、(1)では、水トリー
抑止効果を上げるためビニルアセテート含有量を
多くすると電気的特性を低下する問題がある。ま
た、(2)では水トリー発生を抑止する効果が十分と
云える程すぐれているものではなかつた。
本発明は上記の状況に鑑みなされたものであ
り、導体を被覆する絶縁組成物内における水トリ
ーの発生個数を抑制でき絶縁組成物の絶縁劣化の
進行を阻止できる電線・ケーブルを提供すること
を目的としたものである。
〔発明の概要〕
本発明の電線・ケーブルは、導体外周に半導電
層を介在し架橋ポリエチレンの絶縁組成物を被覆
形成してなり、上記ポリエチレンが、0.2〜５％
のエステル基を含むビニルモノマをグラフトした
高分子重合体を主体とする混和物から形成されて
なるものである。
〔実施例〕
以下本発明の電線・ケーブルを、実施例を用い
図面により説明する。図はモデルケーブルの断面
図であり、１は導体、３は絶縁組成物で導体１の
外周に半導電層２を介在し被覆されており、半導
電層２の外径は４mm、絶縁組成物３の外径は８mm
である。絶縁組成物３は、ポリマ（高分子重合
体）100、ジクミルパーオキサイド2.5及び４，
4′−チオビス（６−ターシヤリブチル−３−メチ
ルフエノール）0.2の組成物である。本実施例は
４個の絶縁組成物の試料を作成し、１個の比較例
の絶縁組成物と対比して説明する。これら絶縁物
の評価は、押出し後加熱架橋して製造した上記に
説明したモデルケーブルを作成して行つた。試験
法は、図のモデルケーブルを水中に浸漬し、50
Hz、3KVを24ケ月課電する試験条件を用い、第
１表に示す試験結果が得られた。
[Background and Objectives of the Invention] The present invention relates to electric wires and cables coated with an insulating composition of crosslinked polyethylene. Cross-linked polyethylene is often used as an insulator for electric wires and cables because it has excellent insulating properties and heat resistance. However, in recent years, when charging electricity in flooded conditions,
It is recognized that water tree occurs and electrical insulation deterioration progresses. In the future, cross-linked polyethylene cables will continue to be used in flooded environments, such as when buried underground, so suppressing this water tree has become an important issue. Various studies have already been conducted in various fields regarding this problem, and as a countermeasure, for example, (1) a method of using ethylene vinyl acetate copolymers alone or in combination; (2) A method of adding special antioxidants and ester group-containing additives,
etc. have been proposed. However, in (1), there is a problem in that when the vinyl acetate content is increased to increase the water tree inhibiting effect, the electrical characteristics deteriorate. In addition, (2) was not so good that it could be said that the effect of inhibiting water tree generation was sufficient. The present invention has been made in view of the above situation, and aims to provide electric wires and cables that can suppress the number of water trees that occur in an insulating composition that coats a conductor and can prevent the progress of insulation deterioration of the insulating composition. This is the purpose. [Summary of the Invention] The electric wire/cable of the present invention is formed by interposing a semiconductive layer on the outer periphery of a conductor and coating it with an insulating composition of crosslinked polyethylene, in which the polyethylene contains 0.2 to 5%.
It is formed from a mixture mainly composed of a high molecular weight polymer grafted with a vinyl monomer containing an ester group. [Example] Hereinafter, the electric wire/cable of the present invention will be explained with reference to the drawings using an example. The figure is a cross-sectional view of a model cable, in which 1 is a conductor, 3 is an insulating composition, and the outer periphery of the conductor 1 is covered with a semiconducting layer 2, the outer diameter of the semiconducting layer 2 is 4 mm, and the insulating composition is The outer diameter of 3 is 8mm
It is. Insulating composition 3 contains polymer (high molecular polymer) 100, dicumyl peroxide 2.5 and 4,
It is a composition of 0.2 of 4'-thiobis(6-tertiarybutyl-3-methylphenol). In this example, four samples of insulating compositions were prepared and explained in comparison with one insulating composition of a comparative example. Evaluation of these insulators was carried out by creating the above-described model cables, which were manufactured by heat crosslinking after extrusion. The test method is to immerse the model cable shown in the figure in water and
The test results shown in Table 1 were obtained using the test conditions of applying Hz, 3KV for 24 months.
以上記述した如く本発明の電線・ケーブルは、
導体を被覆する絶縁組成物内における水トリーの
発生個数を抑制でき絶縁組成物の絶縁劣化の進行
を阻止できる効果を有するものである。
As described above, the electric wire/cable of the present invention is
This has the effect of suppressing the number of water trees that occur in the insulating composition that coats the conductor and preventing the progress of insulation deterioration of the insulating composition.
図は本発明の電線・ケーブルの実施例の断面図
である。
１……導体、２……半導電層、３……絶縁組成
物。
The figure is a sectional view of an embodiment of the electric wire/cable of the present invention. 1... Conductor, 2... Semiconducting layer, 3... Insulating composition.
Claims (1)
ンの絶縁組成物を被覆形成したものにおいて、上
記ポリエチレンが、0.2〜５％のエステル基を含
むビニルモノマをグラフトした高分子重合体を主
体とする混和物から形成されてなることを特徴と
する電線・ケーブル。 ２ 上記高分子重合体が、エステル基を含んだビ
ニルモノマをグラフトした上記ポリエチレンと、
ポリエチレンとの混和物から形成されている特許
請求の範囲第１項記載の電線・ケーブル。 ３ 上記エステル基を含むビニルモノマが酢酸ビ
ニルである特許請求の範囲第１項記載の電線・ケ
ーブル。 ４ 上記エステル基を含むビニルモノマがエチル
アクリレートである特許請求の範囲第１項記載の
電線・ケーブル。[Scope of Claims] 1. A conductor in which a semiconductive layer is interposed on the outer periphery of the conductor and an insulating composition of crosslinked polyethylene is coated, wherein the polyethylene is a high molecular polymer grafted with a vinyl monomer containing 0.2 to 5% of ester groups. Electric wires and cables characterized by being formed from a mixture mainly consisting of. 2. The polyethylene to which the high molecular weight polymer is grafted with a vinyl monomer containing an ester group;
The electric wire/cable according to claim 1, which is formed from a mixture with polyethylene. 3. The electric wire/cable according to claim 1, wherein the vinyl monomer containing an ester group is vinyl acetate. 4. The electric wire/cable according to claim 1, wherein the vinyl monomer containing an ester group is ethyl acrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58144677A JPS6037604A (en) | 1983-08-08 | 1983-08-08 | electric wire cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58144677A JPS6037604A (en) | 1983-08-08 | 1983-08-08 | electric wire cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6037604A JPS6037604A (en) | 1985-02-27 |
| JPH0126128B2 true JPH0126128B2 (en) | 1989-05-22 |
Family
ID=15367680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58144677A Granted JPS6037604A (en) | 1983-08-08 | 1983-08-08 | electric wire cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6037604A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS647407A (en) * | 1987-06-30 | 1989-01-11 | Fujikura Ltd | Power cable |
-
1983
- 1983-08-08 JP JP58144677A patent/JPS6037604A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6037604A (en) | 1985-02-27 |
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