JPH0123885B2 - - Google Patents
Info
- Publication number
- JPH0123885B2 JPH0123885B2 JP55109168A JP10916880A JPH0123885B2 JP H0123885 B2 JPH0123885 B2 JP H0123885B2 JP 55109168 A JP55109168 A JP 55109168A JP 10916880 A JP10916880 A JP 10916880A JP H0123885 B2 JPH0123885 B2 JP H0123885B2
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- weight
- insulator
- parts
- semiconducting layer
- 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
- 239000004698 Polyethylene Substances 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 10
- 229920001038 ethylene copolymer Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000000344 soap Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 3
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Landscapes
- Conductive Materials (AREA)
- Organic Insulating Materials (AREA)
Description
本発明は、高電圧下で使用するポリエチレン絶
縁電力ケーブルの改良に関するものである。
此の種の電力ケーブルは、コロナ放電防止のた
め、第１図に示すように、導体１を内部半導電層
２で被覆し、さらにその周囲に順次ポリエチレン
絶縁体３、外部半導電層４およびシース５を設け
た構造を有する。
従来、かゝる電力ケーブルの製造は、ケーブル
特性の向上と製造工程の簡略化のため、導体１上
の内部半導電層２と絶縁体３及び外部半導電層４
を同時押出成形方式により被覆する方法が採られ
ている。この方法によると、絶縁体と半導電層と
の密着性がよく電気特性、耐圧性の安定したケー
ブルが得られるという利点がある。しかし、絶縁
体と外部半導電層とが一体となり強く接着するた
め、ケーブル接続の際に必要な端末部の被覆層の
剥ぎ取りが困難となり、端末処理に長時間を要す
るばかりでなく、絶縁体等に無用の傷を付け易
く、ケーブル自体の電気特性を低下させるという
問題があつた。
本発明はかゝる問題を解除するためになされた
もので、外部半導電層を形成する材料に金属石鹸
を配合することにより剥離性が著しくよくなるこ
とを見い出し、本発明に至つたものである。
すなわち、本発明によるポリエチレン絶縁電力
ケーブルは、外部半導電層をポリエチレン又はエ
チレン共重合体樹脂100重量部に、導電性カーボ
ンブラツク10〜80重量部および金属石鹸３〜50重
量部を配合してなる材料で形成することを特徴と
する。
本発明において使用する導電性カーボンブラツ
クとしては、フアーネスブラツク、アセチレンブ
ラツク、商品名ケツチエンブラツクEC等が挙げ
られ、前記エチレン共重合体樹脂100重量部に対
し、10〜80重量部が適当である。また、エチレン
共重合体樹脂としては、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が挙
げられ、これらのものは架橋剤を配合して架橋さ
せたものが好ましい。
本発明で使用する金属石鹸としては、ステアリ
ン酸、ラウリン酸、オクチル酸等の高級脂肪酸の
カルシウム、鉛、錫および亜鉛塩等が挙げられ、
前記エチレン共重合体樹脂100重量部に対し、３
〜50重量部が好適である。
なお、上記エチレン共重合体樹脂、導電性カー
ボンブラツクおよび金属石鹸の三成分の他に、酸
化防止剤、などの添加剤を使用することも勿論差
し支えない。
次に、本発明を実施例により具体的に説明す
る。
実施例
先ず、表−１に示す配合の半導電性材料１，２
および３を１mm厚のシールに、架橋ポリエチレン
を４mm厚シートに予備成形し（成形条件は120℃
で５分間プレス）、両シートを重ね合せて180℃、
20分間の架橋条件でプレスし、貼り合せ試料を作
成した。この試料の剥離強度をインストロン試験
機により測定した。
The present invention relates to improvements in polyethylene insulated power cables for use under high voltages. In order to prevent corona discharge, this type of power cable has a conductor 1 covered with an inner semiconducting layer 2, and a polyethylene insulator 3, an outer semiconducting layer 4 and It has a structure in which a sheath 5 is provided. Conventionally, in the manufacture of such power cables, an inner semiconducting layer 2, an insulator 3 and an outer semiconducting layer 4 are formed on a conductor 1 in order to improve cable characteristics and simplify the manufacturing process.
A method has been adopted in which the materials are coated using a co-extrusion molding method. This method has the advantage that a cable with good adhesion between the insulator and the semiconducting layer and stable electrical characteristics and voltage resistance can be obtained. However, since the insulator and the external semiconducting layer are integrated and strongly adhered to each other, it is difficult to peel off the coating layer at the terminal part required for cable connection, and not only does it take a long time to process the terminals, but the insulator There was a problem in that it was easy to cause unnecessary damage to cables, etc., and it deteriorated the electrical characteristics of the cable itself. The present invention was made to solve this problem, and it was discovered that the peelability was significantly improved by adding a metal soap to the material forming the outer semiconductive layer, leading to the present invention. . That is, the polyethylene insulated power cable according to the present invention has an outer semiconductive layer formed by blending 100 parts by weight of polyethylene or ethylene copolymer resin with 10 to 80 parts by weight of conductive carbon black and 3 to 50 parts by weight of metal soap. It is characterized by being made of material. Examples of the conductive carbon black used in the present invention include furnace black, acetylene black, and Kettien Black EC (trade name), and the appropriate amount is 10 to 80 parts by weight based on 100 parts by weight of the ethylene copolymer resin. be. Examples of the ethylene copolymer resin include ethylene vinyl acetate copolymer and ethylene ethyl acrylate copolymer, and these are preferably crosslinked with a crosslinking agent. Examples of the metal soap used in the present invention include calcium, lead, tin, and zinc salts of higher fatty acids such as stearic acid, lauric acid, and octylic acid.
3 parts by weight for 100 parts by weight of the ethylene copolymer resin
~50 parts by weight is preferred. In addition to the above-mentioned three components, ethylene copolymer resin, conductive carbon black, and metal soap, additives such as antioxidants may of course be used. Next, the present invention will be specifically explained using examples. Example First, semiconductive materials 1 and 2 having the composition shown in Table 1 were prepared.
and 3 into a 1 mm thick seal, and the cross-linked polyethylene was preformed into a 4 mm thick sheet (molding conditions were 120°C).
(press for 5 minutes), stack both sheets and heat at 180℃,
A bonded sample was prepared by pressing under crosslinking conditions for 20 minutes. The peel strength of this sample was measured using an Instron tester.
【表】【table】
【表】
次いで、断面積100mm2の撚線導体上に通常の内
部半導電層を押出成形により形成し、その上に架
橋剤を配合したポリエチレン絶縁体と、表−１中
の材料１〜３の配合比を有する外部半導電層をそ
れぞれ同時押出により形成した。これを、圧力20
Kg／cm2の蒸気架橋管中で20分間熱して架橋させ、
6.6K.V.用架橋ポリエチレンケーブルを作成した。
得られたケーブルの表面に形成された外部半導電
層に10mm巾で二本の切傷をつけ、剥離試験を行つ
たところ、本発明によるケーブルの剥離力はそれ
ぞれ2.4、1.1Kgであり容易に剥離することができ
るのに対し、従来のものは剥離不能であつた。
本発明によるポリエチレン絶縁電力ケーブルは
以上の如く剥離性がよいので、ケーブルの接続及
び端末処理作業を容易かつ迅速に行うことができ
る。また、絶縁体等に傷をつけるおそれがないた
めケーブル本来の特性を損うことがない。[Table] Next, a normal internal semiconducting layer was formed by extrusion molding on a stranded wire conductor with a cross-sectional area of 100 mm 2 , and then a polyethylene insulator containing a crosslinking agent was added on top of the layer, and materials 1 to 3 in Table 1 were added. The outer semiconducting layers having a compounding ratio of were formed by coextrusion. Apply this to a pressure of 20
Crosslinked by heating in a steam crosslinking tube of Kg/cm 2 for 20 minutes,
We created a 6.6KV cross-linked polyethylene cable.
Two 10 mm wide cuts were made on the outer semiconductive layer formed on the surface of the obtained cable, and a peel test was performed. The peel strength of the cable according to the present invention was 2.4 kg and 1.1 kg, respectively, indicating that it was easily peeled off. On the other hand, the conventional one could not be peeled off. Since the polyethylene insulated power cable according to the present invention has good peelability as described above, cable connection and terminal processing operations can be performed easily and quickly. Furthermore, since there is no risk of damaging the insulator, etc., the original characteristics of the cable will not be impaired.
図面はポリエチレン絶縁ケーブルの構造を示す
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、５……シース。
The drawing is a sectional view showing the structure of a polyethylene insulated cable. DESCRIPTION OF SYMBOLS 1...Conductor, 2...Inner semiconducting layer, 3...Insulator, 4...Outer semiconducting layer, 5...Sheath.
Claims (1)
レンからなる絶縁体で被覆すると共に、該絶縁体
の内外に半導電層を設けて成るポリエチレン絶縁
電力ケーブルにおいて、前記半導電層がポリエチ
レン又はエチレン共重合樹脂100重量部に、導電
性カーボンブラツク10〜80重量部および金属石鹸
３〜50重量部を配合してなる材料で形成されてい
ることを特徴とするポリエチレン絶縁電力ケーブ
ル。1. A polyethylene insulated power cable in which a conductor is covered with an insulator made of polyethylene or cross-linked polyethylene, and a semiconducting layer is provided inside and outside the insulator, in which the semiconducting layer is made of polyethylene or ethylene copolymer resin 100% by weight. 1. A polyethylene insulated power cable characterized in that it is made of a material containing 10 to 80 parts by weight of conductive carbon black and 3 to 50 parts by weight of metal soap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10916880A JPS5734613A (en) | 1980-08-11 | 1980-08-11 | Polyethylene insulated power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10916880A JPS5734613A (en) | 1980-08-11 | 1980-08-11 | Polyethylene insulated power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5734613A JPS5734613A (en) | 1982-02-25 |
| JPH0123885B2 true JPH0123885B2 (en) | 1989-05-09 |
Family
ID=14503370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10916880A Granted JPS5734613A (en) | 1980-08-11 | 1980-08-11 | Polyethylene insulated power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5734613A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60240018A (en) * | 1984-05-14 | 1985-11-28 | 日本電気株式会社 | Conductive liquid contact switch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4897072A (en) * | 1972-03-23 | 1973-12-11 | ||
| JPS4976943A (en) * | 1972-11-27 | 1974-07-24 | ||
| JPS5073187A (en) * | 1973-10-31 | 1975-06-17 | ||
| JPS50112778A (en) * | 1974-02-18 | 1975-09-04 | ||
| JPS5113982A (en) * | 1974-07-25 | 1976-02-03 | Hitachi Cable | |
| JPS5351485A (en) * | 1976-10-21 | 1978-05-10 | Dainichi Nippon Cables Ltd | Insulated wire coated with vulc anized rubber in ethylene-propylenes |
-
1980
- 1980-08-11 JP JP10916880A patent/JPS5734613A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4897072A (en) * | 1972-03-23 | 1973-12-11 | ||
| JPS4976943A (en) * | 1972-11-27 | 1974-07-24 | ||
| JPS5073187A (en) * | 1973-10-31 | 1975-06-17 | ||
| JPS50112778A (en) * | 1974-02-18 | 1975-09-04 | ||
| JPS5113982A (en) * | 1974-07-25 | 1976-02-03 | Hitachi Cable | |
| JPS5351485A (en) * | 1976-10-21 | 1978-05-10 | Dainichi Nippon Cables Ltd | Insulated wire coated with vulc anized rubber in ethylene-propylenes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5734613A (en) | 1982-02-25 |
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