Patent ID: 7196270

Claim:
A cable comprising: at least one electrical conductor; and at least one extruded covering layer based on a thermoplastic polymer material in admixture with a dielectric liquid, wherein the thermoplastic polymer material is selected from: (a) at least one propylene homopolymer or at least one copolymer of propylene with at least one olefin comonomer selected from ethylene and an α-olefin other than propylene, said homopolymer or copolymer having a melting point greater than or equal to 130° C. and a melting enthalpy of from 20 J/g to 100 J/g; or (b) a mechanical mixture comprising at least one propylene homopolymer or copolymer (a) and (c) at least one elastomeric copolymer of ethylene with at least one aliphatic α-olefin, and optionally a polyene; the concentration by weight of said dielectric liquid in the thermoplastic polymer material is lower than the saturation concentration of said dielectric liquid in the thermoplastic polymer material; and said dielectric liquid has the following characteristics: an amount of polar compound lower than or equal to 2.5% by weight with respect to the total weight of the dielectric liquid; a melting point or a pour point lower than 80° C.; and a ratio of number of aromatic carbon atoms with respect to the total number of carbon atoms lower than 0.6, when the dielectric liquid is aromatic.