Claims
- 1. A polyolefin insulated electric cable exhibiting the effect of suppressed water tree formation which comprises an electrical insulation layer provided around a conductor, said insulation layer comprising a polyolefin grafted with an ester type polyfunctional monomer, which polyolefin contains 0.01 to 0.888% by weight of ester groups.
- 2. A polyolefin insulated electric cable exhibiting the effect of suppressed water tree formation which comprises an electrical insulation layer provided around a conductor, said insulation layer comprising a polyolefin to which a solid ester of fatty acid is added, which polyolefin contains 0.01 to 0.029% by weight of ester groups.
- 3. A polyolefin insulated electric cable exhibiting the effect of suppressed water tree formation which comprises an electrical insulation layer provided around a conductor, said insulation layer comprising a polyolefin to which a water insoluble or slightly soluble metal salt of a fatty acid is added, which polyolefin contains 0.01 to 0.029% by weight of ester groups.
- 4. The cable of claims 1, 2 or 3 wherein said insulation layer contains an organic peroxide cross-linking agent.
- 5. A connector for an electric cable comprising a sleeve connecting the conductors of a cable and an insulating layer covering said the connecting sleeve and arranged around the insulating layer of the cable, said insulating layer covering said connecting sleeve being a polyolefin grafted with an ester type polyfunctional monomer, which polyolefin contains 0.01 to 0.888% by weight of ester groups.
- 6. A connector for an electric cable comprising a sleeve connecting the conductors of a cable and an insulating layer covering said connecting sleeve and arranged around the insulating layer of the cable, said insulating layer covering said connecting sleeve being a polyolefin to which a solid ester of fatty acid is added, which polyolefin contains 0.01 to 0.029% by weight of ester groups.
- 7. A connector for an electric cable comprising a sleeve connecting the conductors of a cable and an insulating layer covering said connecting sleeve and arranged around the insulating layer of the cable, said insulating layer covering said connecting sleeve being a polyolefin to which water insoluble or slightly soluble metal salt of fatty acid is added, which polyolefin contains 0.01 to 0.029% by weight of ester groups.
- 8. An electric cable terminal comprising a terminal connected to the conductor of a cable and an insulating layer for the terminal arranged around the terminal and insulating layer of the cable, said insulating layer for the terminal being a polyolefin grafted with an ester type polyfunctional monomer, which polyolefin contains 0.01 to 0.888% by weight of ester groups.
- 9. An electric cable terminal comprising a terminal connected to the conductor of a cable and an insulating layer for the terminal arranged around the terminal and insulating layer of the cable, said insulating layer for the terminal being a polyolefin to which a solid ester of fatty acid is added, which polyolefin contains 0.01 to 0.029% by weight of ester groups.
- 10. An electric cable terminal comprising a terminal connected to the conductor of a cable and an insulating layer for the terminal arranged around the terminal and insulating layer of the cable, said insulating layer for the terminal being a polyolefin to which a water insoluble or slightly soluble metal salt of a fatty acid is added, which polyolefin contains 0.01 to 0.029% by weight of ester groups.
Priority Claims (2)
Number |
Date |
Country |
Kind |
52-159423 |
Dec 1977 |
JPX |
|
53-151268 |
Dec 1978 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 974,271, filed Dec. 28, 1978, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (5)
Number |
Date |
Country |
2709139 |
Sep 1978 |
DEX |
51-12684 |
Jan 1976 |
JPX |
51-17588 |
Feb 1976 |
JPX |
51-20706 |
Jun 1976 |
JPX |
51-20707 |
Jun 1976 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
974271 |
Dec 1978 |
|