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AssigneeBorealis AG
InventorsUlf Nilsson, Annika Smedberg, Alfred Campus, Achim Blok, Bjorn Voigt
Estimating the term…
A power cable includes a conductor surrounded by one or more layers. At least one of the layers can include a polymer composition having an electric conductivity of 0.50×10−15 S/m or less when measured according to DC conductivity method using a tape sample. The polymer composition can include a polyolefin which is obtainable by a high pressure polymerization process. This process includes: compressing one or more monomers under pressure in a compressor, in which a compressor lubricant, such as mineral oil is used for lubrication; polymerizing a monomer optionally together with one or more comonomers in a polymerization zone; and separating the obtained polyolefin from the unreacted products and recovering the separated polyolefin in a recovery zone.
A direct current (DC) power cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer comprises a polymer composition having an electric conductivity of 0.50×10−15 S/m or less, when measured according to DC conductivity method using a tape sample consisting of the polymer composition as described under “Determination Methods”, the polymer composition comprising a polyolefin which is a low density polyethylene (LDPE) copolymer of ethylene with a polyunsaturated comonomer obtained by a high pressure polymerization process comprising:
Dependencies are inferred from the claim text.