Borealis Ag

Nkt Hv Cables Ab

Emy Silfverberg

Per-Ola Hagstrand

Villgot Englund

Annika Smedberg

Ulf Nilsson

Virginie Eriksson

Carl-Olof Olsson

Hossein Ghorbani

Birgitta Källstrand

Niklas Thorn

Peter Sunnegårdh

Virginie Erikson

Peter Sunnegardh

Birgitta Kallstrand

The present invention relates to a crosslinked polymer composition comprising a crosslinked polyolefin, wherein the polymer composition comprises, prior to crosslinking, a polyolefin and peroxide which is in an amount of less than 35 mmol &#x2014;O&#x2014;O-/kg polymer composition, characterized in that the crosslinked polymer composition has been in a direct contact with a semiconductive composition for 24 h at 70&#xb0; C., and that the crosslinked polymer composition thereafter has an electrical DC-conductivity of 150 fS/m or less, wherein the electrical DC-conductivity is measured in accordance with 'DC conductivity method', as described under 'Determination methods', on a plaque of the crosslinked polymer composition at 70&#xb0; C. and 30 kV/mm mean electric field from a non-degassed and 1 mm thick plaque sample of the crosslinked polymer composition; a layered structure, cable, e.g. a power cable, use of the crosslinked polymer composition and the structured layer, both, for producing a crosslinked power cable, e.g., a cross linked direct current (DC) power cable; and a process for producing a cable.

Crosslinked polymer composition, structured layer and cable

An electric power cable and a process for the production of the cable including a metal conductor and an electric insulation system surrounding the conductor coaxially and radially outwards of the conductor having improved electric properties. The insulation system includes an inner semi-conducting layer surrounded radially outwards by an insulation layer and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer. The electric power cable further includes an inner water blocking material arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material arranged radially outwards from the insulation system. An inner barrier layer is arranged as a diffusion hindering layer between the inner water blocking material and the insulation system and an outer barrier layer is arranged as a diffusion hindering layer between the insulation system and the outer water blocking material.

Electric power cable and a process for the production of the power cable

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Lerum, Sweden

Emy Silfverberg