CN1619708A - Crosslinking polyethylene insulating power cable - Google Patents
Crosslinking polyethylene insulating power cable Download PDFInfo
- Publication number
- CN1619708A CN1619708A CN 200310110083 CN200310110083A CN1619708A CN 1619708 A CN1619708 A CN 1619708A CN 200310110083 CN200310110083 CN 200310110083 CN 200310110083 A CN200310110083 A CN 200310110083A CN 1619708 A CN1619708 A CN 1619708A
- Authority
- CN
- China
- Prior art keywords
- power cable
- conductor
- insulating barrier
- antioxidant
- insulation
- 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
Landscapes
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A crosslinked polyethylene insulation power cable comprises conductor, conductor shielding layer and outer insulation layer, insulation shielding layer covered on outer surface of said insulation layer. Said insulation layer is composed of low density polyethylene resin (fusion index 1.0-3.0), antioxidant, peroxide crosslinking agent, polyolefin elastomer for improving crystalline form, the proportion of above mentioned substance is (by weight) 65-97 : 0.14-1.5 : 0.7- 3.0 : 1.8:30.5. Said invention reduces the size of internal spherocrystal and prolongs the service life of said cable.
Description
Technology contents:
The present invention relates to a kind of power cable, relate to a kind of crosslinked polyethylene insulated power cable specifically.
Background technology:
Crosslinked polyethylene insulated power cable not only has good electrical insulation properties, heat resistance, and installs to lay and not limited by drop, so obtained in recent years developing rapidly and using.At present, the basic structure of crosslinked polyethylene insulated power cable is: conductor, be coated on the conductor shield and the insulating barrier that is coated on the conductor shield outer surface of conductor outer surface, and wrapping is at the insulation screen of insulating barrier outer surface, wherein, insulating barrier is the key component that guarantees the cable operate as normal, and it is determining the useful life of cable.The common wiring cable is a ldpe resin with the base stock of peroxide crosslinked polyethylene Insulation Material, the melt index scope of this resinoid is 1.0--3.0, its remarkable weakness is exactly under effect of electric field, material internal can produce the discharge of electrochemistry branch, promptly so-called electricity tree, when material contains minor amount of water and micropore, under the electric field action, also easily produce water tree skill in the material, the electricity that can quicken cable like this is aging, because tree skill phenomenon is a long-term relatively process, so no matter be the national standard of cable industry, still all do not stipulate the anti-electricity tree and the water-fast tree property index of cable product in the international standard, but the cable expert sets electricity both at home and abroad in decades, water tree dirt causes, processes such as growth have been done research repeatedly, the branch electric discharge phenomena of recognizing cable inside altogether not only exist, and can reduce the useful life of cable greatly.
Technology contents:
Purpose of the present invention provides a kind of crosslinked polyethylene insulated power cable with regard to being at above-mentioned existing in prior technology deficiency.
The present invention includes conductor, be coated on the conductor shield and the insulating barrier that is coated on this conductor shield outer surface of described conductor outer surface, and the insulation screen that is coated on described insulating barrier outer surface, described insulating barrier is to be improved by ldpe resin (melt index 1.0--3.0), antioxidant, peroxide cross-linking agent, crystal habit to combine according to following weight percentage with polyolefin elastomer:
Ldpe resin (melt index 1.0～8.0): 65--97;
Antioxidant: 0.14--1.5;
Peroxide cross-linking agent: 0.7--3.0;
Crystal habit improves uses polyolefin elastomer: 1.8--30.5.
Advantage of the present invention just is by changing the internal crystallization size of crosslinked polyethylene insulated power cable insulating barrier, adding crystal habit in cross-linked polyethylene insulating material improves with polyolefin elastomer such as ethene--propylene copolymer or ethene--octene copolymer, the size of its inner spherocrystal is reduced, and be evenly distributed, thereby improved the transition state of crystal and amorphous region, effectively improved electricity tree in the cross-linked polyethylene insulating material, the initiation voltage of water tree, and effectively reduce electricity tree, the speed of growth of water tree branch, compare with common cross-linked polyethylene insulating material, the electricity tree, the initiation starting voltage of water tree has improved 20%--50%, under same electric field strength, the electricity tree, the branch speed of growth of water tree the 20%--70% that descended has reached and has prolonged the crosslinked polyethylene insulated power cable purpose in useful life.
Embodiment:
Embodiment 1:
Insulating barrier of the present invention is to be improved by ldpe resin (melt index 1.0--3.0), antioxidant, peroxide cross-linking agent, crystal habit to combine according to following weight percentage with polyolefin elastomer:
Ldpe resin (melt index 1.0--3.0): 65;
Antioxidant: 1.5;
Peroxide cross-linking agent: 3.0;
Crystal habit improves uses polyolefin elastomer: 30.5.
Embodiment 2:
Insulating barrier of the present invention is to be improved by ldpe resin (melt index 1.0～3.0), antioxidant, peroxide cross-linking agent, crystal habit to combine according to following weight percentage with polyolefin elastomer:
Ldpe resin (melt index 1.0--3.0): 80;
Antioxidant: 0.7;
Peroxide cross-linking agent: 2.0;
Crystal habit improves uses polyolefin elastomer: 17.3
Embodiment 3:
Insulating barrier of the present invention is to be improved by ldpe resin (Jiang Rong index 1.0--3.0), antioxidant, peroxide cross-linking agent, crystal habit to combine according to following weight percentage through elastomer with polyene:
Ldpe resin (melt index 1.0--3.0): 97;
Antioxidant: 0.2;
Peroxide cross-linking agent: 1.0;
Crystal habit improves with polyene footpath elastomer: 1.8.
Claims (1)
1, a kind of crosslinked polyethylene insulated power cable, it comprises conductor, wrapping is at the conductor shield and the insulating barrier that is coated on this conductor shield outer surface of described conductor outer surface, and the insulation screen that is coated on described insulating barrier outer surface, it is characterized in that: described insulating barrier is to be improved by ldpe resin (melt index 1.0--3.0), antioxidant, peroxide cross-linking agent, crystal habit to combine according to following weight percentage with polyolefin elastomer:
Ldpe resin (melt index 1.0～3.0): 65--97;
Antioxidant: 0.14--1.5;
Peroxide cross-linking agent: 0.7--3.0;
Crystal habit improves uses polyolefin elastomer: 1.8--30.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110083 CN1619708A (en) | 2003-11-20 | 2003-11-20 | Crosslinking polyethylene insulating power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110083 CN1619708A (en) | 2003-11-20 | 2003-11-20 | Crosslinking polyethylene insulating power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1619708A true CN1619708A (en) | 2005-05-25 |
Family
ID=34759038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310110083 Pending CN1619708A (en) | 2003-11-20 | 2003-11-20 | Crosslinking polyethylene insulating power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1619708A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102483971A (en) * | 2009-08-26 | 2012-05-30 | 博里利斯股份公司 | Cable and polymer composition |
| CN103694550A (en) * | 2013-12-17 | 2014-04-02 | 无锡江南电缆有限公司 | Semi-conductive strippable polyolefin shield material for high voltage DC (direct current) cables |
| CN104797649A (en) * | 2012-09-25 | 2015-07-22 | 陶氏环球技术有限责任公司 | Modified ethylene-based polymer compositions and methods of their production |
-
2003
- 2003-11-20 CN CN 200310110083 patent/CN1619708A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102483971A (en) * | 2009-08-26 | 2012-05-30 | 博里利斯股份公司 | Cable and polymer composition |
| CN104797649A (en) * | 2012-09-25 | 2015-07-22 | 陶氏环球技术有限责任公司 | Modified ethylene-based polymer compositions and methods of their production |
| CN103694550A (en) * | 2013-12-17 | 2014-04-02 | 无锡江南电缆有限公司 | Semi-conductive strippable polyolefin shield material for high voltage DC (direct current) cables |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2092535B1 (en) | Energy cable | |
| CA2512852C (en) | Cable with recyclable covering layer | |
| KR101802554B1 (en) | Recyclable thermoplastic insulation with improved breakdown strength | |
| JP5690807B2 (en) | Non-crosslinked polyethylene composition for power cables | |
| JPH01246707A (en) | Semiconductive resin composition | |
| CN101436449B (en) | High voltage, ultra-high voltage power cable capable of suppressing electrical tree generation inside the insulating layer | |
| BR112013015109B1 (en) | cable | |
| NO832147L (en) | Semiconductor THERMOPLASTIC MATERIAL RESISTANT TO HEAT DISTORTION | |
| US20200005961A1 (en) | Electric cable having improved thermal conductivity | |
| KR20130108713A (en) | Non-curing polyethylene composition for power cable | |
| KR101318457B1 (en) | Insulating composition for dc power cable and dc power cable prepared by using the same | |
| CN111961274A (en) | Insulating material for photovoltaic cable and preparation method thereof | |
| CN101281799A (en) | Water resistance tree medium voltage insulated cable material and cable | |
| JP6309030B2 (en) | Non-crosslinked polyethylene composition for power cables | |
| CN1619708A (en) | Crosslinking polyethylene insulating power cable | |
| CN105255017A (en) | Ethylene-propylene rubber insulating material for medium voltage power cable and preparation method thereof | |
| CN108586911A (en) | A kind of track cable insulation material of low density polyethylene (LDPE) and preparation method thereof | |
| CN1801401A (en) | Unsaturated carboxylic acid salt modified WTR insulation material and preparing method | |
| US4704596A (en) | Extrusion coated ignition wire | |
| CN1300085A (en) | Crosslinked polyethylene insulated power cable | |
| CN104829909A (en) | High-temperature-resistant high-strength silane crosslinked polyethylene cable material and preparation method therefor | |
| CN1180904A (en) | 10 KV grade irradiation AC. power cable insulation layer and preparation method thereof | |
| CN106024168A (en) | High insulation resistance flame-retardant four-core cable wire and preparation method thereof | |
| CN103201799A (en) | Insulated wire | |
| US20240013948A1 (en) | Electric wire and multicore cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |