| 摘要 |
The invention relates to an alternating current (AC) power cable, comprising a conductor surrounded by at least an inner semiconductive layer; an insulation layer comprising a polymer composition; and an outer semiconductive layer, in that order, wherein the polymer composition of the insulation layer comprises an LDPE copolymer and a crosslinking agent, and wherein the polymer composition of the insulation layer has a dielectric loss expressed as tan δ (50 Hz) of 12.0∙10or less, and wherein the LDPE copolymer is obtainable by a high pressure process comprising: (a) compressing ethylene under pressure in a compressor, using a compressor lubricant for lubrication, the lubricant comprising a mineral oil, (b) polymerising ethylene together with one or more comonomer(s) in a polymerisation zone, and (c) separating the obtained LDPE copolymer from the unreacted products and recovering the separated LDPE copolymer in a recovery zone. The invention also relates to a process for producing said power cable and to the use of the polymer composition for producing an insulation layer of an AC power cable. |
