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AssigneeFujikura Ltd.
InventorsMichio Takaoka, Tsuneaki Motai, Motoyuki Ono, Shotaro Yoshida, Toshio Niwa, Toru Takahashi, Keiichiro Kataoka, Hiroshi Yamanouchi
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A DC power cable includes a conductor and an insulation of a thermoplastic resin formed around the conductor. The insulation contains carbon black in an amount of about 0.2 to about 5% of the total weight of the thermoplastic resin and the carbon black, and the ratio of mineral oil absorption (cc/100 g) to specific surface (m.sup.2 /g) in the carbon black is not less than 0.7. The carbon black has the hydrogen content of not more than 0.6% by weight. The specific surface is measured by BET equation. The carbon black has a particle size of 10 to 100 nm.
A DC power cable comprising a conductor and an insulation of a thermoplastic resin formed around said conductor, said insulation containing about 0.2 to about 5% by weight of carbon black, the ratio of mineral oil absorption (cc/100 g) to specific surface (m.sup.2 /g) in said carbon black being not less than 0.7, and said carbon black having the hydrogen content of not more than 0.6% by weight.
Dependencies are inferred from the claim text.