JPS627938B2 - - Google Patents
Info
- Publication number
- JPS627938B2 JPS627938B2 JP53000329A JP32978A JPS627938B2 JP S627938 B2 JPS627938 B2 JP S627938B2 JP 53000329 A JP53000329 A JP 53000329A JP 32978 A JP32978 A JP 32978A JP S627938 B2 JPS627938 B2 JP S627938B2
- Authority
- JP
- Japan
- Prior art keywords
- density polyethylene
- parts
- ethylene
- copolymer
- weight
- 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
Landscapes
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、高温インパルス耐性、耐水トリー性
及び可撓性に優れた電気絶縁組成物に関する。低
密度ポリエチレンは、従来から電力ケーブル用の
絶縁材料として使用されて来たが、電力ケーブル
の最高運転温度（90℃程度）あたりの高温度では
インパルス耐電圧値が低下する問題がある。本発
明者らの研究によれば低密度ポリエチレンに高密
度ポリエチレンを配合するとこの高温インパルス
性は改善されるけれども常温における可撓性、耐
水トリー性が低下する問題がある。
上記に鑑み、本発明は、高温インパルス耐性耐
水トリー性、可撓性に優れた電気絶縁組成物を提
案するものであつて、(a)低密度ポリエチレン、(b)
高密度ポリエチレン、及び(c)成分としてエチレン
−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、エチレンプロピレンゴム、エチ
レン−プロピレン−ジエンゴム、スチレン−ブタ
ジエンゴム、イソプレンゴム、及びイソブチレン
−イソプレンゴムからなる群から選ばれた少くと
も一種とからなるものである。
高密度ポリエチレン（密度0.94ｇ／cm2以上）の
使用量は、低密度ポリエチレン（密度0.93ｇ／cm2
以下）100部（重量部、以下同じ）あたり５〜200
部、好ましくは７〜150部であり、(c)成分の使用
量は上記低密度ポリエチレンと高密度ポリエチレ
ンの合計量100部あたり５〜100部、好ましくは８
〜75部である。エチレン−酢酸ビニル共重合体と
しては、酢酸ビニルの含有量が２〜60重量％のも
の、特には５〜35重量％のものが好適に使用し得
る。エチレン−エチルアクリレート共重合体とし
てはエチルアクリレートの含有量が５〜50重量％
のもの、特に10〜35重量％のものが好適に使用し
得る。
本発明の電気絶縁組成物は、低密度ポリエチレ
ンの架橋に通常使用されている有機過酸化物を通
常量用いて架橋し得、又、必要に応じて、老化防
止剤、電圧安定剤等電気絶縁ポリエチレン組成物
に通常使用されるその他の配合剤を併用して二本
ロール、バンバリ−ミキサー等で混合製造し得
る。
実施例１〜９、比較例１〜３
架橋剤としてジクミルパーオキシド（但し実施
例２のみ、１・３−ビス（ｔ−ブチルパーオキシ
イソプロピル）ベンゼン）を２部配合した第１表
に示す各実施例、比較例の組成物を100〜130℃の
加熱ロールで混練し、次いで金型を用いて、中央
に平らな凹部を有するシート（凹部の有効面積
3.14cm2、厚さ0.3mm）を熱板プレスで170℃、100
Kg／cm2−Ｇ、30分間保持して作成した。それぞれ
８個の90℃インパルス耐圧及び90℃耐水トリー性
の結果は第１表の通りである。第１表の結果は比
較例１の特性を100として、比率で示している。
比較例１に比べ、各実施例１〜９は両特性とも
すぐれていることがわかる。
The present invention relates to an electrical insulating composition having excellent high temperature impulse resistance, water tree resistance and flexibility. Low-density polyethylene has traditionally been used as an insulating material for power cables, but there is a problem in that its impulse withstand voltage value decreases at high temperatures, which are around the maximum operating temperature of power cables (approximately 90 degrees Celsius). According to research conducted by the present inventors, when high-density polyethylene is blended with low-density polyethylene, this high-temperature impulse property is improved, but there is a problem that flexibility and water resistance at room temperature are reduced. In view of the above, the present invention proposes an electrical insulating composition having excellent high temperature impulse resistance, water resistance, and flexibility, comprising (a) low density polyethylene, (b)
High-density polyethylene, and as component (c) ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene propylene rubber, ethylene-propylene-diene rubber, styrene-butadiene rubber, isoprene rubber, and isobutylene-isoprene rubber At least one type selected from the group consisting of: The amount of high-density polyethylene (density 0.94 g/cm 2 or higher) used is the same as that of low-density polyethylene (density 0.93 g/cm 2
Below) 5 to 200 per 100 parts (parts by weight, same below)
parts, preferably 7 to 150 parts, and the amount of component (c) used is 5 to 100 parts, preferably 8 parts, per 100 parts of the total amount of the above-mentioned low density polyethylene and high density polyethylene.
~75 copies. As the ethylene-vinyl acetate copolymer, one having a vinyl acetate content of 2 to 60% by weight, particularly 5 to 35% by weight can be suitably used. As an ethylene-ethyl acrylate copolymer, the content of ethyl acrylate is 5 to 50% by weight.
Particularly 10 to 35% by weight can be suitably used. The electrical insulating composition of the present invention can be crosslinked using a normal amount of an organic peroxide commonly used for crosslinking low-density polyethylene, and if necessary, anti-aging agents, voltage stabilizers, etc. Other compounding agents commonly used in polyethylene compositions may be used in combination to produce the mixture using a two-roll mixer, a Banbury mixer, or the like. Examples 1 to 9, Comparative Examples 1 to 3 Two parts of dicumyl peroxide (only in Example 2, 1,3-bis(t-butylperoxyisopropyl)benzene) were blended as a crosslinking agent as shown in Table 1. The compositions of each Example and Comparative Example were kneaded with heated rolls at 100 to 130°C, and then, using a mold, a sheet having a flat recess in the center (the effective area of the recess)
3.14cm 2 , thickness 0.3mm) at 170℃ and 100℃ using a hot plate press.
Kg/cm 2 -G and maintained for 30 minutes. Table 1 shows the results of 8 90°C impulse pressure resistance and 90°C water resistance. The results in Table 1 are expressed as a ratio, with the characteristics of Comparative Example 1 set as 100. It can be seen that, compared to Comparative Example 1, Examples 1 to 9 are superior in both characteristics.
【表】【table】
Claims (1)
密度が0.94以上の高密度ポリエチレン、及び(c)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−プロピレン共
重合体、エチレン−プロピレン−ジエン共重合
体、スチレン−ブタジエン共重合体、イソプレン
ゴム、及びイソブチレン−イソプレン共重合体か
らなる群から選ばれた少なくとも一種とからな
り、上記高密度ポリエチレンの量は上記低密度ポ
リエチレン100重量部あたり５〜200重量部であ
り、上記(c)成分の量は上記低密度ポリエチレンと
高密度ポリエチレンの合計量100重量部あたり５
〜100重量部である電力ケーブル用の電気絶縁組
成物。1 (a) Low-density polyethylene with a density of 0.93 or less, (b)
High-density polyethylene with a density of 0.94 or more, and (c) ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, styrene-butadiene copolymer and at least one selected from the group consisting of polymer, isoprene rubber, and isobutylene-isoprene copolymer, and the amount of the high-density polyethylene is 5 to 200 parts by weight per 100 parts by weight of the low-density polyethylene, and the above ( c) The amount of component is 5 parts per 100 parts by weight of the above-mentioned low-density polyethylene and high-density polyethylene.
~100 parts by weight electrical insulation composition for power cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32978A JPS5494543A (en) | 1978-01-04 | 1978-01-04 | Electrical insulating composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32978A JPS5494543A (en) | 1978-01-04 | 1978-01-04 | Electrical insulating composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5494543A JPS5494543A (en) | 1979-07-26 |
| JPS627938B2 true JPS627938B2 (en) | 1987-02-19 |
Family
ID=11470856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32978A Granted JPS5494543A (en) | 1978-01-04 | 1978-01-04 | Electrical insulating composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5494543A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220157758A (en) * | 2021-05-21 | 2022-11-29 | 현대자동차주식회사 | Double Motion Type Vibration Generator and Driver's Warning Device Thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111635569A (en) * | 2019-03-01 | 2020-09-08 | 浙江万马高分子材料有限公司 | High-voltage cable insulating material and preparation method and application thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4972339A (en) * | 1972-11-10 | 1974-07-12 | ||
| JPS5651180B2 (en) * | 1974-04-16 | 1981-12-03 | ||
| JPS5211235A (en) * | 1975-07-16 | 1977-01-28 | Nippon Petrochem Co Ltd | High density polyethylene composition |
| JPS5214647A (en) * | 1975-07-25 | 1977-02-03 | Mitsubishi Petrochem Co Ltd | Wire coating composition |
| JPS5928218B2 (en) * | 1976-06-09 | 1984-07-11 | 三菱電線工業株式会社 | Polyethylene crosslinking method |
-
1978
- 1978-01-04 JP JP32978A patent/JPS5494543A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220157758A (en) * | 2021-05-21 | 2022-11-29 | 현대자동차주식회사 | Double Motion Type Vibration Generator and Driver's Warning Device Thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5494543A (en) | 1979-07-26 |
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