JPH02121207A - Insulated cable - Google Patents
Insulated cableInfo
- Publication number
- JPH02121207A JPH02121207A JP27433188A JP27433188A JPH02121207A JP H02121207 A JPH02121207 A JP H02121207A JP 27433188 A JP27433188 A JP 27433188A JP 27433188 A JP27433188 A JP 27433188A JP H02121207 A JPH02121207 A JP H02121207A
- Authority
- JP
- Japan
- Prior art keywords
- acid amide
- fatty acid
- benzene
- bis
- butylperoxyisopropyl
- 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
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 16
- 229930195729 fatty acid Natural products 0.000 claims abstract description 16
- 239000000194 fatty acid Substances 0.000 claims abstract description 16
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 16
- UBRWPVTUQDJKCC-UHFFFAOYSA-N 1,3-bis(2-tert-butylperoxypropan-2-yl)benzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC(C(C)(C)OOC(C)(C)C)=C1 UBRWPVTUQDJKCC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 4
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 4
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 4
- FWWXYLGCHHIKNY-UHFFFAOYSA-N 2-ethoxyethyl prop-2-enoate Chemical compound CCOCCOC(=O)C=C FWWXYLGCHHIKNY-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000000996 additive effect Effects 0.000 claims abstract description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 3
- 229920005672 polyolefin resin Polymers 0.000 claims description 18
- 238000000034 method Methods 0.000 abstract description 8
- 238000000354 decomposition reaction Methods 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 150000001408 amides Chemical class 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000012212 insulator Substances 0.000 description 7
- 230000007774 longterm Effects 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- -1 Hydroxy-2-propyl Chemical group 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- AXWJKQDGIVWVEW-UHFFFAOYSA-N 2-(dimethylamino)butanedioic acid Chemical compound CN(C)C(C(O)=O)CC(O)=O AXWJKQDGIVWVEW-UHFFFAOYSA-N 0.000 description 1
- BDCFWIDZNLCTMF-UHFFFAOYSA-N 2-phenylpropan-2-ol Chemical group CC(C)(O)C1=CC=CC=C1 BDCFWIDZNLCTMF-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 229940113162 oleylamide Drugs 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 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〉
この発明は長期安定性に優れた架橋ポリオレフィン系樹
脂絶縁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 a crosslinked polyolefin resin insulated cable with excellent long-term stability.
〈従来の技術〉
従来、絶縁ケーブルとしてはＯＦケーブルの他に架橋ポ
リオレフィン系樹脂ケーブルが用いられている。<Prior Art> Conventionally, in addition to OF cables, crosslinked polyolefin resin cables have been used as insulated cables.
そして架橋ポリオレフィン系樹脂ケーブルは保守の容易
なこと、送電ロスが低いことなどからＯＦケーブルに代
って広（使用されつつある。ところが、この架橋ポリオ
レフィン系樹脂ケーブルは長期安定性においてはＯＦケ
ーブルのそれに比べて劣るという欠点があり、この欠点
を改善するためにこれまでにも種々の検討がなされてい
る。Cross-linked polyolefin resin cables are being widely used instead of OF cables because they are easy to maintain and have low power transmission loss. However, cross-linked polyolefin resin cables are less stable than OF cables in terms of long-term stability. There is a drawback that it is inferior to that, and various studies have been made to improve this drawback.
架橋ポリオレフィン系樹脂ケーブルの長期安定性に影響
を及ぼす要因の一つとしては水分が挙げられている。絶
縁体中に水分が存在すると、絶縁体中の異物、ボイドあ
るいは絶縁体と内部および外部半導電層の界面の不整部
等の高電界部に水分が集まり、水トリーと称する導電性
の樹枝状チャネルを形成し、遂には絶縁破壊に至ること
が知られている。Moisture is cited as one of the factors that affects the long-term stability of crosslinked polyolefin resin cables. When moisture is present in the insulator, it collects in high electric field areas such as foreign objects, voids, and irregularities at the interface between the insulator and the internal and external semiconducting layers, forming conductive branches called water trees. It is known that this leads to the formation of a channel, which eventually leads to dielectric breakdown.
このため、外部環境からの水分が絶縁体中に侵入しない
ように、絶縁体の外側に金属層を設けた構造を有する絶
縁ケーブルも使用されている。For this reason, insulated cables are also used that have a structure in which a metal layer is provided on the outside of the insulator to prevent moisture from the external environment from penetrating into the insulator.
また架橋方法も高圧水蒸気を熱媒体として用いる方法か
らヒーター加熱、加熱ガス使用等の水蒸気を用いない乾
式架橋と称する方法を用いるようになってきている。Furthermore, the crosslinking method has changed from a method using high-pressure steam as a heat medium to a method called dry crosslinking that does not use steam, such as heating with a heater or using heated gas.
しかしながら、架橋ポリオレフィン系樹脂に用いる架橋
剤として１．３−ビス（ターシャリ−ブチルパーオキシ
イソプロピル）ベンゼンを使用する場合、高温で長時間
加熱されると、分解残渣として水分が発生することが知
られており、外部から水分が侵入しない構造としても絶
縁体中に水分が発生する問題点を有している。However, when 1,3-bis(tertiary-butylperoxyisopropyl)benzene is used as a crosslinking agent for crosslinked polyolefin resins, it is known that water is generated as a decomposition residue when heated at high temperatures for a long time. Therefore, even if the structure does not allow moisture to enter from the outside, there is a problem in that moisture is generated in the insulator.
〈発明が解決しようとする課題〉
従来の絶縁ケーブルに用いる架橋ポリオレフィン系樹脂
絶縁体は架橋剤にパーオキサイドを使用している。この
うち１．３−ビス（ターシャリ−ブチルパーオキシイソ
プロピル）ベンゼンは高温で長時間加熱されると、下式
で示すように
水分を発生する問題点があった。<Problems to be Solved by the Invention> The crosslinked polyolefin resin insulator used in conventional insulated cables uses peroxide as a crosslinking agent. Among these, 1,3-bis(tert-butylperoxyisopropyl)benzene has the problem of generating moisture when heated at high temperature for a long time, as shown in the following formula.
このため、１．３−ビス（ターシャリ−ブチルパーオキ
シイソプロピル）ベンゼン以外の２，５ジメチル２，５
−ビス（ターシャリ−ブチルパーオキシ）ヘキシン３の
ような架橋剤を用いることも考えられるが、このような
架橋剤は１，３−ビス（ターシャリ−ブチルパーオキシ
イソプロピル）ベンゼンに比・べて高価であり、また架
橋効率に劣り、実用性に乏しかった。Therefore, 2,5 dimethyl 2,5 other than 1,3-bis(tert-butylperoxyisopropyl)benzene
- It is also possible to use crosslinking agents such as bis(tert-butylperoxy)hexyne3, but such crosslinking agents are more expensive than 1,3-bis(tert-butylperoxyisopropyl)benzene. Moreover, the crosslinking efficiency was poor, and the practicality was poor.
く課題を解決するための手段〉
本発明者らは上記の点に鑑みて、架橋ポリオレフィン系
樹脂を絶縁層とする絶縁ケーブルにおける１、３−ビス
（ターシャリ−ブチルパーオキシイソプロピル）ベンゼ
ン架橋剤を用いた場合の水分の発生を抑えるべく検討の
結果、この発明に至ったものである。Means for Solving the Problems> In view of the above points, the present inventors developed a method for using a 1,3-bis(tert-butylperoxyisopropyl)benzene crosslinking agent in an insulated cable having an insulating layer made of a crosslinked polyolefin resin. This invention was developed as a result of studies aimed at suppressing the generation of moisture when used.
即ち、この発明は１，３−ビス（ターシャリ−ブチルパ
ーオキシイソプロピル）ベンゼンを架橋剤として用い、
かつ脂肪酸アミドを添加剤として用いて架橋された′ポ
リオレフィン系樹脂を絶縁層とすることによって長期安
定性に優れた絶縁ケーブルを提供するものである。That is, this invention uses 1,3-bis(tertiary-butylperoxyisopropyl)benzene as a crosslinking agent,
Moreover, by using a polyolefin resin crosslinked using a fatty acid amide as an additive as an insulating layer, an insulated cable with excellent long-term stability is provided.
く作用〉
この発明は上記したように、絶縁層を構成する架橋ポリ
オレフィン系樹脂の架橋剤として１，３−ビス（ターシ
ャリ−ブチルパーオキシイソプロピル）ベンゼンを用い
ながら、脂肪酸アミドを併用することによって１．３−
ビス（ターシャリ−ブチルパーオキシイソプロピル）ベ
ンゼンの分解残渣である水分の発生を抑えるというもの
である。Effect> As described above, this invention uses 1,3-bis(tertiary-butylperoxyisopropyl)benzene as a crosslinking agent for the crosslinked polyolefin resin constituting the insulating layer and also uses a fatty acid amide. .3-
The purpose is to suppress the generation of water, which is a decomposition residue of bis(tert-butylperoxyisopropyl)benzene.
この機構についての詳細は未だ明かではないが、水分は
１．３−ビス（ターシャリ−ブチルパーオキシイソプロ
ピル）ベンゼンの分解生成物である１、３−ビス（２−
ヒドロキシ−２−プロピル）ベンゼンがさらに分解して
生ずるものであるから、この１，３−ビス（ターシャリ
−ブチルパーオキシイソプロピル）ベンゼンに脂肪酸ア
ミドを併用すれば脂肪酸アミドの影響により１．３−ビ
ス（２−ヒドロキシ−２−プロピル）ベンゼンの分解が
抑えられるものと考えられる。The details of this mechanism are still unclear, but water is a decomposition product of 1,3-bis(2-bis(tert-butylperoxyisopropyl)benzene).
Hydroxy-2-propyl)benzene is produced by further decomposition, so if a fatty acid amide is used in combination with 1,3-bis(tert-butylperoxyisopropyl)benzene, 1,3-bis(hydroxy-2-propyl)benzene is It is thought that the decomposition of (2-hydroxy-2-propyl)benzene is suppressed.
この発明でポリオレフィン系樹脂としては、高圧法ある
いは低圧法による低密度ポリエチン、エチレン−ビニル
アセテート、エトキシエチルアクリレートのうちの何れ
か１種あるいは２種以上を用いれば良（、また、架橋剤
として用いる１、３−ビス（ターシャリ−ブチルパーオ
キシイソプロピル）ベンゼンの添加量はポリオレフィン
系樹脂の架橋度が適度に得られる量でより１．０〜３．
０重量％が好ましい。In this invention, the polyolefin resin may be one or more of the following: low-density polyethine produced by a high-pressure method or a low-pressure method, ethylene-vinyl acetate, and ethoxyethyl acrylate (also used as a crosslinking agent). The amount of 1,3-bis(tertiary-butylperoxyisopropyl)benzene to be added is 1.0 to 3.0, which is an amount that provides an appropriate degree of crosslinking of the polyolefin resin.
0% by weight is preferred.
また、脂肪酸アミドとしてはモノ脂肪酸アミド、ビス脂
肪酸アミドなとがあり具体的にはステアリルアミド、オ
レイルアミド、メチレンビスステアロアミド、エチレン
ビスステアロアミドなどが挙げられる。In addition, fatty acid amides include monofatty acid amides and bisfatty acid amides, and specific examples include stearylamide, oleylamide, methylene bisstearamide, and ethylene bisstearamide.
そしてこの脂肪酸アミドの添加量は０．０１重量％未満
では１．３−ビス（ターシャリ−ブチルパーオキシイソ
プロピル）ベンゼンからの水分の発生を抑えることがで
きず、また２重量％を越えるとケーブル加工前の未架橋
ポリオレフィン系樹脂ペレット表面にブルーミングを生
じ、押出加工を安定して行なうことができなくなるので
０．０１〜２重量％の範囲内が好ましい。If the amount of fatty acid amide added is less than 0.01% by weight, it will not be possible to suppress the generation of moisture from 1,3-bis(tertiary-butylperoxyisopropyl)benzene, and if it exceeds 2% by weight, cable processing will be required. The content is preferably within the range of 0.01 to 2% by weight since blooming may occur on the surface of the previous uncrosslinked polyolefin resin pellet, making it impossible to stably perform extrusion processing.
なお、この発明における架橋ポリオレフィン系樹脂絶縁
体には適宜４．４′−チオビス（６−ターシヤノープチ
ルー３−メチルフェノール）やテトラキス〔メチレン−
３−（３’、５’−ジ−ターシャリ−ブチル−４７−ヒ
ドロキシフェニル）プロピオネートコメタンのような酸
化防止剤等の添加剤を配合しても良い。The crosslinked polyolefin resin insulator in this invention may include 4,4'-thiobis (6-tercyanobutyl-3-methylphenol) or tetrakis [methylene-
Additives such as antioxidants such as 3-(3',5'-di-tert-butyl-47-hydroxyphenyl)propionate comethane may also be blended.
〈実施例〉 以下、この発明を実施例により詳細に説明する。<Example> Hereinafter, this invention will be explained in detail with reference to Examples.
実施例１
第１表に示す密度、メルトフローレートなどの物理特性
を有するポリオレフィン系樹脂を用い、これに第２表、
第３表に示す架橋剤や脂肪酸アミドを配合し、１２０℃
の熱ロールにて５分間混合した後、１２０℃の熱プレス
を用いて２０ｍｍ厚の未架橋シートを作成した。Example 1 A polyolefin resin having the physical properties such as density and melt flow rate shown in Table 1 was used, and
Mixed with the crosslinking agent and fatty acid amide shown in Table 3, heated to 120°C.
After mixing for 5 minutes using a hot roll, a 20 mm thick uncrosslinked sheet was prepared using a 120° C. hot press.
これらの未架橋シートを窒素ガス５ｋｇ／ｃｍ２の圧力
下で２２０℃で６０分加熱した後、シートを取り出し、
シート中央部よりサンプリングして水分量を測定した。After heating these uncrosslinked sheets at 220°C for 60 minutes under a pressure of nitrogen gas of 5 kg/cm2, the sheets were taken out,
A sample was taken from the center of the sheet to measure the moisture content.
なお、水分量の測定はカールフィッシャー微量水分測定
法により行なった。The moisture content was measured by the Karl Fischer trace moisture measurement method.
その結果は第２表、第３表に示した。The results are shown in Tables 2 and 3.
尚、表中試料随に＊印のあるのは比較例である。In addition, in the table, those marked with * next to the samples are comparative examples.
第
表
第
表
（重量％）
上表から、脂肪酸アミドな添加しない試料Ｎｏ、 １．
９．１２、および１５においては５００ｐｐｍ以上の水
分が発生し、また脂肪酸アミドの量が本発明の範囲より
少ない場合（試料Ｎｏ、２）にも多量（４５０ｐｐｍ）
の水分が発生するのに対し、０．０１〜２重量％の範囲
内の脂肪酸アミドを添加した本発明の実施例においては
、水分量が３０ｐｐｍ以下であり、水分の発生が著しく
抑えられていることが認められた。Table 1 (wt%) From the above table, sample No. 1 without fatty acid amide added.
In 9.12 and 15, 500 ppm or more of water was generated, and even when the amount of fatty acid amide was less than the range of the present invention (sample No. 2), a large amount (450 ppm) was generated.
In contrast, in the examples of the present invention in which fatty acid amide was added in the range of 0.01 to 2% by weight, the amount of moisture was 30 ppm or less, and the generation of moisture was significantly suppressed. This was recognized.
尚、第２表中試料ＮＱ、 ７は脂肪酸アミドの量が多い
ために表面にブルーミングが認められた。In addition, in samples NQ and 7 in Table 2, blooming was observed on the surface due to the large amount of fatty acid amide.
実施例２
高圧法低密度ポリエチレン樹脂に第４表に示す架橋剤や
脂肪酸アミドを配合した材料を絶縁層とし、カーボンを
分散した半導電性樹脂を内部および外部半導電層として
持つケーブルを１２０℃で三層同時押出し方式により加
工し、このケーブルを窒素ガス５ｋｇ／ｃｄの圧力下で
２２０℃で約６０分架橋処理を行なって絶縁ケーブルを
得た。Example 2 A cable having an insulating layer made of a high-pressure low-density polyethylene resin mixed with the crosslinking agent and fatty acid amide listed in Table 4, and a semiconductive resin in which carbon is dispersed as the inner and outer semiconductive layers was heated at 120°C. This cable was processed by a three-layer simultaneous extrusion method, and this cable was crosslinked at 220° C. for about 60 minutes under a pressure of nitrogen gas of 5 kg/cd to obtain an insulated cable.
次に、この絶縁ケーブルの絶縁層中央部よりサンプリン
グして水分量の測定を行なった。その結果は第４表に示
した。Next, a sample was taken from the center of the insulating layer of this insulated cable to measure the moisture content. The results are shown in Table 4.
なお、試料魚に※印のあるのは比較例である。In addition, sample fish marked with * are comparative examples.
第
表
〈発明の効果〉
以上説明したように、この発明の架橋ポリオレフィン系
樹脂絶縁層を有する絶縁ケーブルは、該絶縁層が加熱に
よる水分の発生を著しく抑制されており、長期安定性に
優れて、特に使用電界の高い絶縁ケーブルとして使用す
ることができるのである。Table <Effects of the Invention> As explained above, the insulated cable having the crosslinked polyolefin resin insulating layer of the present invention has excellent long-term stability because the insulating layer significantly suppresses the generation of moisture due to heating. In particular, it can be used as an insulated cable with a high electric field.
Claims (3)
パーオキシイソプロピル）ベンゼンを用い、かつ脂肪酸
アミドを添加剤に用いて架橋されたポリオレフィン系樹
脂を絶縁層とすることを特徴とする絶縁ケーブル。(1) An insulated cable characterized in that the insulating layer is made of a polyolefin resin crosslinked using 1,3-bis(tert-butylperoxyisopropyl)benzene as a crosslinking agent and fatty acid amide as an additive. .
を特徴とする請求項（１）記載の絶縁ケーブル。(2) The insulated cable according to claim (1), wherein the fatty acid amide is added in an amount of 0.01 to 2% by weight.
チレン、低圧法低密度ポリエチレン、エチレンビニルア
セテート、エトキシエチルアクリレートのうち何れか１
種あるいは２種以上を用いることを特徴とする請求項（
１）または（２）記載の絶縁ケーブル。(3) As the polyolefin resin, any one of high-pressure low-density polyethylene, low-pressure low-density polyethylene, ethylene vinyl acetate, and ethoxyethyl acrylate
A claim characterized in that a species or two or more species are used (
The insulated cable described in 1) or (2).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27433188A JPH02121207A (en) | 1988-10-28 | 1988-10-28 | Insulated cable |
| DE3853281T DE3853281T2 (en) | 1987-12-03 | 1988-12-02 | METHOD FOR PRODUCING AN INSULATING CABLE. |
| EP89900150A EP0344328B1 (en) | 1987-12-03 | 1988-12-02 | Method for making an insulated cable |
| PCT/JP1988/001220 WO1989005511A1 (en) | 1987-12-03 | 1988-12-02 | Insulating cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27433188A JPH02121207A (en) | 1988-10-28 | 1988-10-28 | Insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02121207A true JPH02121207A (en) | 1990-05-09 |
Family
ID=17540166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27433188A Pending JPH02121207A (en) | 1987-12-03 | 1988-10-28 | Insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02121207A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6486407A (en) * | 1987-06-18 | 1989-03-31 | Furukawa Electric Co Ltd | Electric cable and electric cable connecting part using insulation of insulating crosslink polyolefine resin composite |
| JPH01246710A (en) * | 1988-03-29 | 1989-10-02 | Hitachi Cable Ltd | Bow tie tree resistant electricity insulating composition |
-
1988
- 1988-10-28 JP JP27433188A patent/JPH02121207A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6486407A (en) * | 1987-06-18 | 1989-03-31 | Furukawa Electric Co Ltd | Electric cable and electric cable connecting part using insulation of insulating crosslink polyolefine resin composite |
| JPH01246710A (en) * | 1988-03-29 | 1989-10-02 | Hitachi Cable Ltd | Bow tie tree resistant electricity insulating composition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02121207A (en) | Insulated cable | |
| JPH02121209A (en) | Insulated cable | |
| JPH01243306A (en) | Insulated cable | |
| JPH01243308A (en) | Insulated cable | |
| JP2001325834A (en) | Dc power cable | |
| JPH02121208A (en) | Insulated cable | |
| JPH0562529A (en) | Power cable | |
| EP0344328B1 (en) | Method for making an insulated cable | |
| JPH01243307A (en) | Insulated cable | |
| JPH02204910A (en) | Insulated cable | |
| JPH02204911A (en) | Insulated cable | |
| JPH02204913A (en) | Insulated cable | |
| JPH02204914A (en) | Insulated cable | |
| JP2921090B2 (en) | Semiconductive resin composition | |
| JPH01100803A (en) | Electric insulator for wire and cable | |
| JPS598216A (en) | Polyolefin insulated power cable with semiconductive layer | |
| JP2921091B2 (en) | Electric wires and cables | |
| JPH01113446A (en) | Polyolefin composition | |
| JPH0417208A (en) | Rubber-plastic insulated electric power cable | |
| JPH02129806A (en) | Electric insulating material for electric wire and cable | |
| JPH03273042A (en) | Electrical insulator for wire and cable | |
| JPH02123616A (en) | Electric insulating material for electric wire and cable | |
| JPS63289715A (en) | Composition for wire-cable insulator | |
| JPH03101081A (en) | Insulation structure in joint portion of power cable | |
| JPS5914204B2 (en) | insulated wire |