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US 10,950,366 B2Granted
Polymer composition and a power cable comprising the polymer composition
AssigneeBorealis AG
InventorsUlf Nilsson, Annika Smedberg, Alfred Campus
Life of this patent
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AssigneeBorealis AG
InventorsUlf Nilsson, Annika Smedberg, Alfred Campus
Estimating the term…
An alternating current (AC) power cable includes a conductor surrounded by at least an inner semiconductive layer including a first semiconductive composition, an insulation layer including a polymer composition, an outer semiconductive layer including a second semiconductive composition, and optionally a jacketing layer including a jacketing composition, in that order. The polymer composition of the insulation layer includes an unsaturated low density polyethylene (LDPE) copolymer of ethylene with one or more polyunsaturated comonomers and a crosslinking agent. The polymer composition of the insulation layer has a dielectric loss expressed as tan δ (50 Hz) of 12.0×10−4 or less, when measured at 25 kV/mm and 130° C. according to “Test for Tan δ measurements on 10 kV cables”.
An alternating current (AC) power cable, comprising a conductor surrounded by at least an inner semiconductive layer comprising a first semiconductive composition, an insulation layer comprising a polymer composition, and an outer semiconductive layer comprising a second semiconductive composition, in that order, wherein the polymer composition of the insulation layer comprises a polyolefin and a crosslinking agent, wherein the polyolefin is an unsaturated LDPE copolymer and wherein the polymer composition of the insulation layer has a dielectric loss expressed as tan δ (50 Hz) of 12.0×10−4 or less, when measured at 25 kV/mm and 130° C. according to “Test for Tan δ measurements on 10 kV cables” as described in the description part under “Determination methods”.
Dependencies are inferred from the claim text.