POWER CABLE EMBEDDING DIELECTRIC FLUID AND MIXTURE OF THERMOPLASTIC POLYMERS Russian patent published in 2009 - IPC H01B3/44 

FIELD: electricity.

SUBSTANCE: invention refers to power cable embedding electrical conductor and extruded protective overlayer including thermoplastic polymer material mixed with dielectric fluid where thermoplastic polymer material includes;(a) at least 75% wt in relation to total weight of thermoplastic polymer material, at least one copolymer of at least two a-olefinic comonomers, at that enthalpy of fusion of mentioned copolymer is less than 25 J/g; and (b) quantity equal or less than 25% wt in relation to total weight of thermoplastic polymer material, of at least one homopolymer of propylene or copolymer of propylene with at least one a-olefin, besides enthalpy of fusion of at least one homopolymer of propylene or copolymer of propylene exceeds 25 J/g, and fusion temperature exceeds 130°C. Enthalpy of fusion of protective overlayer is equal or less than 40 J/g, and weight content of dielectric fluid in thermoplastic polymer material is less than concentration of saturation of dielectric fluid in thermoplastic polymer material.

EFFECT: invention allows to improve cable flexibility not deteriorating its thermomechanical behaviour.

49 cl, 1 dwg, 3 tbl, 8 ex