JPH02258851A - Electrical insulating resin composition - Google Patents
Electrical insulating resin compositionInfo
- Publication number
- JPH02258851A JPH02258851A JP8080989A JP8080989A JPH02258851A JP H02258851 A JPH02258851 A JP H02258851A JP 8080989 A JP8080989 A JP 8080989A JP 8080989 A JP8080989 A JP 8080989A JP H02258851 A JPH02258851 A JP H02258851A
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- copolymer
- vinyl alcohol
- ethyl acrylate
- composition
- 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
- 239000011342 resin composition Substances 0.000 title abstract description 10
- 229920001577 copolymer Polymers 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 24
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims abstract description 12
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical group OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims abstract description 11
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims abstract description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 14
- 239000005977 Ethylene Substances 0.000 claims description 14
- 239000004711 α-olefin Substances 0.000 abstract description 6
- 239000012212 insulator Substances 0.000 abstract description 5
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 3
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 240000005572 Syzygium cordatum Species 0.000 description 8
- 235000006650 Syzygium cordatum Nutrition 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- -1 Polyethylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- QWBBPBRQALCEIZ-UHFFFAOYSA-N 2,3-dimethylphenol Chemical group CC1=CC=CC(O)=C1C QWBBPBRQALCEIZ-UHFFFAOYSA-N 0.000 description 1
- 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
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N ethyl ethylene Natural products CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- 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、電カケープルの絶縁体などに用いられる耐
水トリー性の良好な電気絶縁性樹脂組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to an electrically insulating resin composition with good water resistance and used as an insulator for electrical cables.
ポリエチレン組成物は、その電気的特性や機械的特性等
から種々の電気絶縁性材料として使用されており、特に
電カケープルの絶縁体としても多（用いられている。Polyethylene compositions are used as various electrically insulating materials due to their electrical and mechanical properties, and are particularly widely used as insulators for electrical cables.
しかしながら、近年の使用電圧の高圧化に伴い水トリー
性の問題がクローズアップされている。However, in recent years, as the voltage used has become higher, the problem of water tree property has been attracting attention.
即ち、電カケープルの絶縁体として架橋ポリエチレンを
用いた場合、長期間に渡り浸水状態で課電が続けられる
と、最終的には絶縁破壊が生ずる現象であるが、その原
因としては、ポリエチレンが疎水性であるために水が異
常電界部分に集中し易いためであると考えられる。In other words, when cross-linked polyethylene is used as the insulator of a power cable, dielectric breakdown will eventually occur if electricity continues to be applied while submerged in water for a long period of time.The reason for this is that polyethylene is hydrophobic. This is thought to be because water tends to concentrate in the abnormal electric field area due to the nature of the electric field.
このような水トリーに対する対策として、種々の方策が
考えられているが、ポリエチレンに他の樹脂等をブレン
ドすることが試みられている。即ち、エチレン−酢酸ビ
ニル共重合体（Ｅ Ｖ Ａ）、エチレンー二チルアクリ
レート共重合体（Ｅ Ｅ Ａ ）、ポリエチレングリコ
ール（ＰＥＧ）等をブレンドしたものが提案されている
。Various measures have been considered as countermeasures against such water trees, and attempts have been made to blend polyethylene with other resins. That is, blends of ethylene-vinyl acetate copolymer (EVA), ethylene-dityl acrylate copolymer (EEA), polyethylene glycol (PEG), etc. have been proposed.
しかしながら、上記したこれらの樹脂の添加によっても
、例えば、異常浸水状態が続くような場合には、未だ十
分とは言えなかった。However, even the addition of these resins described above is still not sufficient, for example, in cases where abnormal water immersion continues.
本発明は、このような条件下でも十分に対応でき、特に
耐水トリー性に優れた電気絶縁材料として使用できる樹
脂組成物を提供することにある。The object of the present invention is to provide a resin composition that can sufficiently cope with such conditions and can be used as an electrical insulating material that has particularly excellent water resistance.
この発明においては、密度０．８８〜０．９１９／ｃＩ
１１３のエチレン・α−オレフィン共重合体ト、エチレ
ン・ビニルアルコール共重合体およびエチレン・アクリ
ル酸エチル共重合体の少なくとも１つ以上の共重合体と
からなる組成物であって、この組成物中のビニルアルコ
ールおよびアクリル酸エチルのいずれか１種の含有量が
０．２〜１０重１％で、かつビニルアルコールおよびア
クリル酸エチルの２種の合計の含有量が２０重量％以下
である組成物を用いることによって、上記課題を解決す
るようにした。In this invention, the density is 0.88 to 0.919/cI
A composition comprising at least one copolymer of ethylene/α-olefin copolymer No. 113, an ethylene/vinyl alcohol copolymer, and an ethylene/ethyl acrylate copolymer, the composition comprising: A composition in which the content of any one of vinyl alcohol and ethyl acrylate is 0.2 to 10% by weight, and the total content of the two types of vinyl alcohol and ethyl acrylate is 20% by weight or less. The above problem was solved by using .
この発明で用いられる密度０．８８〜０．９１９／ｃｆ
ｆｌ″のエチレン・α−オレフィン共重合体トシては、
プロピレン、ブテン−１，４−メチルペンテン−１等の
炭素数３〜１０のα−オレフィンとエチレンとの共重合
体で、その密度が０．８８〜０、 ９１９／ｃｍ″の範
囲のものが選ばれる。密度が０．８８〜０．９１９／ｃ
ｔｎ３の範囲のエチレン−ａ−オレフィン共重合体を用
いることにより、従来から使用されている低密度ポリエ
チレンに比べて樹脂組成物の耐水トリー性が向上する。Density 0.88 to 0.919/cf used in this invention
The ethylene/α-olefin copolymer of fl'' is
A copolymer of ethylene and an α-olefin having 3 to 10 carbon atoms, such as propylene and butene-1,4-methylpentene-1, with a density in the range of 0.88 to 0.919/cm''. Selected.Density is 0.88-0.919/c
By using an ethylene-a-olefin copolymer in the range of tn3, the water resistance of the resin composition is improved compared to conventionally used low-density polyethylene.
この発明の樹脂組成物にあっては、このエチレン中α−
オレフィン共重合体に対して、エチレン・ビニルアルコ
ール共重合体およびエチレン・アクリル酸エチル共重合
体のいずれか１種または２種をブレンドして耐水トリー
性を更に改善するようにしている。これらの共重合体の
配合量は、ブレンドポリマー中の極性基の含有量によっ
て規定される。すなわち、エチレン・ビニルアルコール
共重合体およびエチレン・アクリル酸エチル共重合体の
うちのいずれか１種をブレンドする場合には、ビニルア
ルコールおよびアクリル酸エチルのいずれか１種が０．
２〜１０重量％の範囲となるように定められる。０．２
重量％未満では耐水トリー性の向上効果が得られず、１
０重量％を越えると初期絶縁破壊特性および誘電圧接が
低下して不都合となる。したがって、エチレン・ビニル
アルコール共重合体およびエチレン・アクリル酸エチル
共重合体自体のそれぞれのビニルアルコールおよびアク
リル酸エチルの含有量に限定されず、ブレンドポリマー
全体中のそれぞれの含有量が０． ２〜１０重量％であ
ればよい。In the resin composition of this invention, α-
Water resistance is further improved by blending one or two of ethylene/vinyl alcohol copolymer and ethylene/ethyl acrylate copolymer with the olefin copolymer. The blending amount of these copolymers is determined by the content of polar groups in the blend polymer. That is, when blending any one of an ethylene/vinyl alcohol copolymer and an ethylene/ethyl acrylate copolymer, one of the vinyl alcohol and ethyl acrylate has 0.
It is determined to be in the range of 2 to 10% by weight. 0.2
If it is less than 1% by weight, the effect of improving water resistance cannot be obtained;
If it exceeds 0% by weight, the initial dielectric breakdown characteristics and dielectric voltage contact will deteriorate, resulting in disadvantages. Therefore, the respective contents of vinyl alcohol and ethyl acrylate in the ethylene/vinyl alcohol copolymer and ethylene/ethyl acrylate copolymer themselves are not limited, and the content of each in the entire blend polymer is 0. It may be 2 to 10% by weight.
マタ、エチレン・ビニルアルコール共重合体オよびエチ
レン・アクリル酸エチル共重合体の２種をブレンドする
場合には、ブレンドポリマー中のビニルアルコールおよ
びアクリル酸エチルのそれぞれの含有量が０．２〜１０
重量％の範囲とされ、かつこれらの２種の合計の含有量
が２０重量％以下とされる。２０重量％を越えると極性
基の含有量が過剰となり、組成物の電気的特性が低下し
て不都合となる。When blending two types of polyester, ethylene/vinyl alcohol copolymer and ethylene/ethyl acrylate copolymer, the content of each of vinyl alcohol and ethyl acrylate in the blend polymer is 0.2 to 10%.
% by weight, and the total content of these two types is 20% by weight or less. If it exceeds 20% by weight, the content of polar groups will be excessive and the electrical properties of the composition will deteriorate, resulting in disadvantages.
この発明の樹脂組成物にあっては、高温時の流動性を防
止するために、必要に応じて架橋させることができる。The resin composition of the present invention can be crosslinked if necessary in order to prevent fluidity at high temperatures.
この場合の架橋方法としては、有機過酸化物を用いた化
学架橋、シラン架橋や電子線照射架橋などが用いられる
。また、必要に応じて老化防止剤、架橋助剤、架橋促進
剤などの配合剤を適宜添加することもできる。As a crosslinking method in this case, chemical crosslinking using an organic peroxide, silane crosslinking, electron beam irradiation crosslinking, etc. are used. Furthermore, compounding agents such as anti-aging agents, crosslinking aids, and crosslinking accelerators may be added as appropriate.
このような電気絶縁性樹脂組成物にあっては、極性基が
適量存在しこの極性基に水分が分散し、異常電界部分に
集中することがなくなり、耐水トリー性が向上する。In such an electrically insulating resin composition, a suitable amount of polar groups is present, water is dispersed in the polar groups, and water is not concentrated in abnormal electric field areas, thereby improving water resistance.
以下、実施例を示して作用効果を明確にする。Hereinafter, examples will be shown to clarify the effects.
〈実施例〉
第１表に示す組成物（実施例■〜［相］、比較例■〜■
）を作成した。尚、実施例■〜■の場合は、エチレン・
ブテン−１共重合体＜ｔｏｏ、 ８９０ＭＦＲ＝ｌ、
Ｑ）に対してエチレン−ビニルアルコール共重合体（Ｅ
−ＶＡＬ、 クラレ社製、エバールＥＰ−Ｇｌ １０
．ＭＦＲ＝１４．ＶΔＬ％＝６４％）又はエチレン−ア
クリル酸エチル共１重合体（ＥＥＡ、ＭＦＲ＝２．ＥＡ
％＝１５％）を種々の割合で添加し、この混合物１００
重量部に架橋剤として、ジクミルパーオキサイド２．０
重量部、老化防止剤として、４，４′−チオビス−（６
第３メチル−３−メチルフェノール）を０． ３平頂部
加えて混練し、組成物を得た。<Example> Compositions shown in Table 1 (Examples ■~[phase], Comparative Examples ■~■
)It was created. In addition, in the case of Examples ■ to ■, ethylene
Butene-1 copolymer<too, 890MFR=l,
Q) versus ethylene-vinyl alcohol copolymer (E
-VAL, manufactured by Kuraray Co., Ltd., EVAL EP-Gl 10
．． MFR=14. VΔL%=64%) or ethylene-ethyl acrylate comonopolymer (EEA, MFR=2.EA
%=15%) in various proportions, and this mixture 100%
Dicumyl peroxide 2.0 as a crosslinking agent in the weight part
Part by weight, 4,4'-thiobis-(6
tertiary methyl-3-methylphenol) to 0. 3 flat tops were added and kneaded to obtain a composition.
マタ、実施例■の場合は、エチレン−４−メチルペンテ
ン−１共重合体く密度０．９００．ＭＦＲ＝１．０）に
対シて、エチレン−ビニルアルコール共重合体（Ｅ−Ｖ
ＡＬ、 クラレ社製、エバールＥ Ｐ−Ｇ ｌ １０
） 及ヒエチレンー酢酸ビニル共重合体（Ｅ Ｖ Ａ
、 Ｍ Ｆ Ｒ＝ ２ 、 Ｖ Ａ ％＝ １５ ％）
を添加したものに、上記実施例と同様に架橋剤及び老化
防止剤を加えて組成物を得た。In the case of Example 2, the density of the ethylene-4-methylpentene-1 copolymer was 0.900. MFR=1.0), ethylene-vinyl alcohol copolymer (E-V
AL, manufactured by Kuraray Co., Ltd., EVAL EP-Gl 10
) and ethylene-vinyl acetate copolymer (EVA
, MFR=2, VA%=15%)
A crosslinking agent and an anti-aging agent were added to the mixture in the same manner as in the above example to obtain a composition.
また、比較例■〜■の場合は、エチレン−ブテン−１共
重合体（密度０．８９０．ＭＦＲ＝１゜０）のみのもの
、低密度ポリエチレン（密度０゜９２３、ＭＦＲ＝１．
２）のみのものに、上記実施例と同様に架橋剤及び老゛
化防止剤を加えて組成物を得た。In addition, in the case of Comparative Examples ① to ②, those containing only ethylene-butene-1 copolymer (density 0.890.MFR=1°0) and low-density polyethylene (density 0°923, MFR=1.0°) were used.
A composition was obtained by adding a crosslinking agent and an anti-aging agent to 2) in the same manner as in the above example.
これらの各組成物を１８０°ＣＸｌ０分間プレス成形し
たシート状試料について、水トリー試験及び誘電正接（
ｔａｎδ）を測定した。Water tree test and dielectric loss tangent (
tan δ) was measured.
この際の水トリー試験では、厚さ５ＩＩｌｆｆｌの試験
片の底面に導電性塗料を設け、これを接地側電極とし、
上面には水電極を設け、これに］ＱＫｖ、ＩＫ Ｈｚの
電圧を３０日間印加後、試験片を煮沸し、これにより発
生する５０μ以上の水トリー数を観察し、比較例■の場
合の発生数を１００とする相対数として表示した。In this water tree test, a conductive paint was applied to the bottom of a test piece with a thickness of 5IIlffl, and this was used as a grounding electrode.
A water electrode was provided on the top surface, and after applying a voltage of QKv, IK Hz to this for 30 days, the test piece was boiled, and the number of water trees of 50 μ or more generated was observed, and the number of water trees generated in Comparative Example ① was determined. It is expressed as a relative number with the number being 100.
又、誘電正接（ｔａｎδ）は、１ｍｍ厚のシートにｌＫ
ｖ、５０Ｈｚの電圧を印加し、シェーリングブリッジに
より測定した。In addition, the dielectric loss tangent (tan δ) is lK for a 1 mm thick sheet.
A voltage of 50 Hz was applied and the measurement was performed using a Schering bridge.
次に、前記第１表の実施例■、■及び比較例■。Next, Examples (2) and (2) and Comparative Example (2) in Table 1 above.
■の組成物を導体上に３ｍｍ厚さに押出し被覆して２０
０１１１１ＴＩ？導体断面積の電カケープルを作成し、
それぞれを実施例■、■、比較例■、■とじた。The composition of (2) was extruded and coated on the conductor to a thickness of 3 mm.
01111TI? Create a power cable with a conductor cross section,
Examples (2) and (2) and comparative examples (2) and (2) were bound, respectively.
なお、これらのケーブルは内部及び外部半導電層を有す
るものである。Note that these cables have inner and outer semiconducting layers.
上記電カケープルについて、７０℃の温水中で１ＫＨｚ
、１０Ｋｖの電圧を９０日間印加した後、５Ｋｖ／３０
分ステップアップの条件で交流破壊電圧を求めた。その
結果を第２表に示す。Regarding the above electric cable, 1KHz in 70℃ warm water
, after applying a voltage of 10Kv for 90 days, 5Kv/30
AC breakdown voltage was determined under minute step-up conditions. The results are shown in Table 2.
第１表および第２表の結果から明らかなように、この発
明の電気絶縁性樹脂組成物は、水トリーの発生が少な（
、かつ電気的特性が優れたものであることがわかる。As is clear from the results in Tables 1 and 2, the electrically insulating resin composition of the present invention has less occurrence of water trees (
, and has excellent electrical characteristics.
以」二説明したように、この発明の電気絶縁性樹脂組成
物は、密度０．８８〜０．９１９／ｃｍ３のエチレン・
α−オレフィン共重合体と、エチレン・ビニルアルコー
ル共重合体およびエチレン・アクリル酸エチル共重合体
の少なくとも１つ以上の共重合体とからなる組成物であ
って、この組成物中のビニルアルコールおよびアクリル
酸エチルのいずれか１種の含有量が０．２〜１０重世％
で、かつビニルアルコールおよびアクリル酸エチルの２
種の合計の含有量が２０重量％以下であるとしたもので
あるので、この組成物を電カケープルの絶縁体としたと
きに水トリーの発生がほとんどなく、かつ電気的特性の
優れたものとなる効果が得られる。As explained below, the electrically insulating resin composition of the present invention is made of ethylene having a density of 0.88 to 0.919/cm3.
A composition comprising an α-olefin copolymer and at least one copolymer of ethylene/vinyl alcohol copolymer and ethylene/ethyl acrylate copolymer, wherein the vinyl alcohol and The content of any one of ethyl acrylate is 0.2 to 10%
, and 2 of vinyl alcohol and ethyl acrylate
Since the total content of seeds is 20% by weight or less, when this composition is used as an insulator for electrical cables, there is almost no water tree generation and the composition has excellent electrical properties. You can get the following effect.
Claims (1)
オレフィン共重合体と、 エチレン・ビニルアルコール共重合体およびエチレン・
アクリル酸エチル共重合体の少なくとも１つ以上の共重
合体とからなる組成物であって、この組成物中のビニル
アルコールおよびアクリル酸エチルのいずれか１種の含
有量が０．２〜１０重量％で、かつビニルアルコールお
よびアクリル酸エチルの２種の合計の含有量が２０重量
％以下であることを特徴とする電気絶縁性樹脂組成物。[Claims] Ethylene α- having a density of 0.88 to 0.91 g/cm^3
Olefin copolymers, ethylene/vinyl alcohol copolymers, and ethylene/vinyl alcohol copolymers.
A composition comprising at least one copolymer of ethyl acrylate copolymer, wherein the content of any one of vinyl alcohol and ethyl acrylate in the composition is 0.2 to 10% by weight. %, and the total content of two types of vinyl alcohol and ethyl acrylate is 20% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8080989A JPH02258851A (en) | 1989-03-31 | 1989-03-31 | Electrical insulating resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8080989A JPH02258851A (en) | 1989-03-31 | 1989-03-31 | Electrical insulating resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02258851A true JPH02258851A (en) | 1990-10-19 |
Family
ID=13728797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8080989A Pending JPH02258851A (en) | 1989-03-31 | 1989-03-31 | Electrical insulating resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02258851A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0386742A (en) * | 1989-08-31 | 1991-04-11 | Du Pont Mitsui Polychem Co Ltd | Crosslinkable ethylene copolymer composition |
-
1989
- 1989-03-31 JP JP8080989A patent/JPH02258851A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0386742A (en) * | 1989-08-31 | 1991-04-11 | Du Pont Mitsui Polychem Co Ltd | Crosslinkable ethylene copolymer composition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI224607B (en) | Tree resistant cable | |
| JPH01319204A (en) | High voltage cable having insulation mainly composed of ethylene polymer having high resistance against formation of water-tree | |
| JPH02258851A (en) | Electrical insulating resin composition | |
| JPS64767B2 (en) | ||
| JPH02281504A (en) | Tracking resistant tape or sheet | |
| JP2838277B2 (en) | Power cable | |
| JPH02233741A (en) | Electrical insulating resin composition | |
| JPH07107806B2 (en) | Power cable | |
| JPH0469185B2 (en) | ||
| JPS62246946A (en) | Resin composition | |
| JPH0269543A (en) | Insulating composition and power cable | |
| JPS6086140A (en) | Electrically insulating composition | |
| JPH0515007B2 (en) | ||
| JPS5998403A (en) | Semiconductive composition | |
| JPH0360122B2 (en) | ||
| JPH011746A (en) | resin composition | |
| JPS63226814A (en) | Electrically insulating composition | |
| JPH02165506A (en) | High-tension cable | |
| JPS6356645B2 (en) | ||
| JPH08199013A (en) | Semiconductive resin composition and crosslinked polyethylene insulated power cable | |
| JPH01267904A (en) | Extruded type semiconductive resin compound for electric power cable | |
| JPS633049A (en) | Resin composition | |
| JPH036250A (en) | Insulating composition and electric cable using the same | |
| JPH08241624A (en) | Semiconductor resin composition for power cable | |
| JPH088017B2 (en) | Power cable |