Polymer composition for W and C application with advantageous electrical properties
AssigneeBorealis AG
InventorsUlf Nilsson, Per-Ola Hagstrand, Villgot Englund, Andreas Farkas, Janis Ritums
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Abstract
The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.
Claims11
A process for producing a power cable wherein the process comprises the steps of applying on a conductor an inner semiconductive layer comprising a first semiconductive composition, an insulation layer comprising an insulation composition and an outer semiconductive layer comprising a second semiconductive composition, in that order, wherein the composition of at least the insulating layer comprises a polymer composition comprising
- (a) from 1.0 to 40 wt % of a polyethylene selected from the group consisting of:
- very low density polyethylene (VLDPE) having a density of from 850 to 909 kg/m3, linear low density polyethylene (LLDPE) having a density of from 909 to 930 kg/m3, medium density polyethylene (MDPE) having a density of from 930 to 945 kg/m3, and high density polyethylene (HDPE) having a density of 945 kg/m3 or more;
- (b) from 60 to 99 wt % of a low density polyethylene (LDPE), and
- (c) dicumyl peroxide in an amount of 0.1 to 110 mmol —O—O—/kg polymer composition.
A polymer composition comprising
- (a) from 0.1 to 40 wt % of a polyethylene selected from the group consisting of:
- very low density polyethylene (VLDPE) having a density of from 850 to 909 kg/m3, linear low density polyethylene (LLDPE) having a density of from 909 to 930 kg/m3, medium density polyethylene (MDPE) having a density of from 930 to 945 kg/m3, and high density polyethylene (HDPE) having a density of 945 kg/m3 or more;
- (b) from 60 to 99.9 wt % of a low density polyethylene (LDPE);
- and
- (c) dicumyl peroxide in an amount of 0.1 to 110 mmol —O—O—/kg polymer composition.
Dependencies are inferred from the claim text.