JPH0562529A - Power cable - Google Patents
Power cableInfo
- Publication number
- JPH0562529A JPH0562529A JP3245167A JP24516791A JPH0562529A JP H0562529 A JPH0562529 A JP H0562529A JP 3245167 A JP3245167 A JP 3245167A JP 24516791 A JP24516791 A JP 24516791A JP H0562529 A JPH0562529 A JP H0562529A
- Authority
- JP
- Japan
- Prior art keywords
- water
- power cable
- impurities
- tree
- extractable
- 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
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐水トリー性に優れた
電力ケーブルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cable having excellent water tree resistance.
【０００２】[0002]
【従来の技術】従来、電力ケーブルの絶縁体としては、
架橋ポエリチレン（ＸＬＰＥ）が広く汎用されている。
このＸＬＰＥのベース樹脂としてのポリエチレン（Ｐ
Ｅ）は、一般に高圧法で重合された低密度ＰＥ（ＬＤＰ
Ｅ）が使用されている。この高圧法は、エチレンガスを
高気圧（１０００〜３０００Ｋｇ／ｃｍ2 ）に圧縮し、
反応管中でＰＥを重合させる方法であるが、この製造工
程中に極微量の不純物が混入されることがある。このよ
うな微量不純物としては、例えばエチレンガス圧縮シリ
ンダからの潤滑材不純物、反応管壁からの不純物などが
挙げられる。2. Description of the Related Art Conventionally, as an insulator of a power cable,
Cross-linked Poeritylene (XLPE) is widely used.
Polyethylene (P as base resin of this XLPE
E) is generally low-density PE (LDP) polymerized by a high pressure method.
E) is used. This high pressure method compresses ethylene gas to a high pressure (1000 to 3000 Kg / cm 2 ),
Although this is a method of polymerizing PE in a reaction tube, an extremely small amount of impurities may be mixed during this manufacturing process. Examples of such trace impurities include lubricant impurities from the ethylene gas compression cylinder and impurities from the reaction tube wall.
【０００３】[0003]
【発明が解決しようとする課題】ところが、本発明者等
の研究によると、上記不純物中にポリエーテル系化合物
などの水抽出性のものが含まれている場合、これらの不
純物は水との親和性が高いため、ケーブル絶縁体の耐水
トリー性を悪化させることが判った。However, according to the study of the present inventors, when the impurities include water-extractable substances such as polyether compounds, these impurities have an affinity for water. It was found that the water resistance of the cable insulator deteriorates because of its high resistance.
【０００４】本発明は、このような観点に立ってなされ
たものである。The present invention has been made from this point of view.
【０００５】[0005]
【課題を解決するための手段および作用】かゝる本発明
は、水抽出性微量不純物を含まない低密度ポリエチレン
を絶縁体として用いたことを特徴とする電力ケーブルに
ある。The present invention resides in a power cable characterized by using low-density polyethylene containing no water-extractable trace impurities as an insulator.
【０００６】このような水抽出性微量不純物としては、
例えばポリエーテル系化合物、ポリビニルアルコール、
ポリビニルホルマールなどが挙げられる。この水抽出性
微量不純物を含まない低密度ポリエチレン（ＬＤＰＥ）
を得るには、例えば水によって抽出、除去するか、ある
いは不純物の混入を完全に防止した製造方法によって製
造すればよい。[0006] As such water-extractable trace impurities,
For example, polyether compounds, polyvinyl alcohol,
Examples thereof include polyvinyl formal. Low density polyethylene (LDPE) that does not contain water-extractable trace impurities
In order to obtain the above, for example, extraction and removal with water, or a production method in which impurities are completely prevented may be produced.
【０００７】[0007]
【実施例】先ず、エチレンガス圧縮機シリンダの潤滑油
としてポリエーテル系潤滑材を用いて製造したＬＤＰＥ
（ＬＤＰＥ−１）と、炭化水素系潤滑油を用いて製造し
たＬＤＰＥ（ＬＤＰＥ−２）を用意する。次に、上記Ｌ
ＤＰＥ−１のＬＤＰＥにおいて、粉砕した後、沸騰水中
で処理し、その後乾燥させ、水抽出性微量不純物を除去
したＬＤＰＥ（ＬＤＰＥ−３）を得た。EXAMPLES First, LDPE manufactured by using a polyether lubricant as a lubricating oil for an ethylene gas compressor cylinder.
(LDPE-1) and LDPE (LDPE-2) manufactured using a hydrocarbon lubricating oil are prepared. Next, the above L
LDPE of DPE-1 was pulverized, then treated in boiling water and then dried to obtain LDPE (LDPE-3) from which water-extractable trace impurities were removed.
【０００８】上記３種類のＬＤＰＥ−１〜３の１００重
量部に対して、架橋剤としてＤＣＰを２重量部、チオビ
スフェノール系の酸化防止剤を０．２重量部を添加し、
混練し、これを絶縁体として、内部および外部半導電層
と共に３層同時押出して、表１に示したように、絶縁体
厚さ３ｍｍ、導体面積１００ｍｍ2の各架橋ポリエチレ
ン（ＸＬＰＥ）絶縁電力ケーブル（実施例１〜２、比較
例１）を製造した。これらの架橋された絶縁体を夫々Ｘ
ＬＰＥ−１、ＸＬＰＥ−２およびＸＬＰＥ−３とする。To 100 parts by weight of the above-mentioned three kinds of LDPE-1 to 3, 2 parts by weight of DCP and 0.2 parts by weight of a thiobisphenol type antioxidant are added as a crosslinking agent,
Kneading, this as an insulator, with internal and external semiconducting layers on 3-layer coextruded, as shown in Table 1, insulation thickness 3 mm, the cross-linked polyethylene conductor area 100 mm 2 (XLPE) insulated power cable (Examples 1 and 2, Comparative Example 1) were manufactured. Each of these cross-linked insulators is
LPE-1, XLPE-2 and XLPE-3.
【０００９】これらの各電力ケーブル（実施例１〜２、
比較例１）について、導体に注水し、７０℃の水中で、
１０Ｋｖ、１ＫＨｚの条件下、１か月間の浸水課電試験
を行った。これにより、絶縁体中に発生した水トリー
（５０μｍ以上のボータイトリー）の量を観察した。そ
の結果は、上記表１に併記してある。なお、同表におい
て、水トリーの発生量は、ＸＬＰＥ−１を用いた比較例
１を１００とした場合の相対量として示してある。Each of these power cables (Examples 1 and 2,
Regarding Comparative Example 1), water was poured into the conductor, and the temperature was changed to 70 ° C in water.
The immersion test was performed for 1 month under the conditions of 10 Kv and 1 KHz. By this, the amount of water tree (50 μm or more of voltite tree) generated in the insulator was observed. The results are also shown in Table 1 above. In addition, in the same table, the generation amount of the water tree is shown as a relative amount when Comparative Example 1 using XLPE-1 is set to 100.
【００１０】[0010]
【表１】 [Table 1]
【００１１】この表１から、本発明の実施例１〜２のよ
うに、水抽出により水抽出性微量不純物を除去したり、
あるいは炭化水素系潤滑油を用いて最初から水抽出性微
量不純物を混入しないようにしたりして、結果として水
抽出性微量不純物を含まないようにしたＸＬＰＥを用い
た電力ケーブルでは、当該水抽出性微量不純物を含有す
るもの（比較例１）に比較して、ボータイトリー量が半
分以下となって、良好な耐水トリー性が得られることが
判る。これに対して、上記水抽出性微量不純物を含んだ
比較例１の場合、ボータイトリー量が多く、耐水トリー
性が悪いことが判る。From Table 1, as in Examples 1 and 2 of the present invention, water-extractable trace impurities are removed by water extraction,
Alternatively, in a power cable using XLPE in which a hydrocarbon-based lubricating oil is used to prevent mixing of water-extracting trace impurities from the beginning, and as a result, water-extracting trace impurities are not contained, It can be seen that the amount of battoli tree is half or less as compared with that containing a trace amount of impurities (Comparative Example 1), and good water resistance is obtained. On the other hand, in the case of Comparative Example 1 containing the water-extractable trace impurities, it can be seen that the amount of battoli tree is large and the water tree resistance is poor.
【００１２】[0012]
【発明の効果】以上の説明から明らかなように本発明に
よれば、水抽出性微量不純物を含まない低密度ポリエチ
レンを絶縁体として用いてあるため、耐水トリー性に優
れた電力ケーブルを提供することができる。As is apparent from the above description, according to the present invention, a low-density polyethylene containing no water-extractable trace impurities is used as an insulator, so that a power cable having excellent water tree resistance is provided. be able to.
Claims (2)
リエチレンを絶縁体として用いたことを特徴とする電力
ケーブル。1. A power cable comprising low-density polyethylene containing no water-extractable trace impurities as an insulator.
合物であることを特徴とする請求項１記載の電力ケーブ
ル。2. The electric power cable according to claim 1, wherein the water-extractable trace impurities are polyether compounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3245167A JPH0562529A (en) | 1991-08-29 | 1991-08-29 | Power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3245167A JPH0562529A (en) | 1991-08-29 | 1991-08-29 | Power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0562529A true JPH0562529A (en) | 1993-03-12 |
Family
ID=17129608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3245167A Pending JPH0562529A (en) | 1991-08-29 | 1991-08-29 | Power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0562529A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013510915A (en) * | 2009-11-11 | 2013-03-28 | ボレアリス エージー | Polymer composition and power cable comprising the same |
| US9365708B2 (en) | 2009-11-11 | 2016-06-14 | Borealis Ag | Cable and production process thereof |
| US9595374B2 (en) | 2010-11-03 | 2017-03-14 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US10246527B2 (en) | 2009-11-11 | 2019-04-02 | Borealis Ag | Polymer composition comprising a polyolefin produced in a high pressure process, a high pressure process and an article |
| US10774204B2 (en) | 2016-11-10 | 2020-09-15 | Lg Chem, Ltd. | Crosslinked polyethylene composition |
| US11078312B2 (en) | 2009-11-11 | 2021-08-03 | Borealis Ag | Crosslinkable polymer composition and cable with advantageous electrical properties |
-
1991
- 1991-08-29 JP JP3245167A patent/JPH0562529A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10246527B2 (en) | 2009-11-11 | 2019-04-02 | Borealis Ag | Polymer composition comprising a polyolefin produced in a high pressure process, a high pressure process and an article |
| US10875939B2 (en) | 2009-11-11 | 2020-12-29 | Borealis Ag | Polymer composition comprising a polyolefin produced in a high pressure process, a high pressure process and an article |
| US9365708B2 (en) | 2009-11-11 | 2016-06-14 | Borealis Ag | Cable and production process thereof |
| US9587043B2 (en) | 2009-11-11 | 2017-03-07 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US10453585B2 (en) | 2009-11-11 | 2019-10-22 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US11756700B2 (en) | 2009-11-11 | 2023-09-12 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| JP2016020505A (en) * | 2009-11-11 | 2016-02-04 | ボレアリス エージー | Polymer composition and power cable comprising the polymer composition |
| US11390699B2 (en) | 2009-11-11 | 2022-07-19 | Borealis Ag | Crosslinkable polymer composition and cable with advantageous electrical properties |
| JP2013510915A (en) * | 2009-11-11 | 2013-03-28 | ボレアリス エージー | Polymer composition and power cable comprising the same |
| US11078312B2 (en) | 2009-11-11 | 2021-08-03 | Borealis Ag | Crosslinkable polymer composition and cable with advantageous electrical properties |
| US9595374B2 (en) | 2010-11-03 | 2017-03-14 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US10950366B2 (en) | 2010-11-03 | 2021-03-16 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US10586634B2 (en) | 2010-11-03 | 2020-03-10 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US10032543B2 (en) | 2010-11-03 | 2018-07-24 | Borealis Ag | Polymer composition and a power cable comprising the polymer composition |
| US10774204B2 (en) | 2016-11-10 | 2020-09-15 | Lg Chem, Ltd. | Crosslinked polyethylene composition |
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