Abstract: The invention relates to a process for the manufacture of an electric cable comprising an extruded thermoplastic layer obtained from a composition comprising at least one dielectric liquid and at least one thermoplastic polymer chosen from a propylene homopolymer and copolymer, and also to a cable obtained by said process.

Abstract: The invention relates to a cable comprising at least one electrically insulating layer obtained from a polymer composition comprising at least one thermoplastic polymer material based on polypropylene, at least one dielectric liquid, at least a first thermally conductive inorganic filler having a morphology M1 and at least a second thermally conductive inorganic filler having a morphology M2 different from M1.

Abstract: A cable is provided having at least one electrically insulating layer obtained from a polymer composition with at least one polypropylene-based thermoplastic polymer material and at least one inorganic filler selected from aluminium oxide, a hydrated aluminium oxide, magnesium oxide, zinc oxide, and a mixture thereof; and a method for making the cable.

Abstract: An extruder (5) for extruding an electric cable has an extrusion screw (7) arranged inside a barrel (6) and making it possible for the polymer to melt gradually in order to form an extrusion composition and for this composition to be transported along the extrusion screw (7). An extrusion head (8) is arranged at a distal end (21) of the extrusion screw (7) and configured to apply the composition around an elongated electrically conductive element. The at least one liquid injection channel (22) is formed through the barrel (6), the at least one injection channel (22) having at least one outlet orifice (30) emerging in a zone of the extrusion screw (7) in which the thermoplastic polymer is at least partially in the solid state.

Abstract: An extruder (5) for extruding an electric cable includes at least one elongated electrically conductive element and at least one extruded thermoplastic layer surrounding said elongated electrically conductive element. The extruder has a member (4) for feeding a polymer in solid form, a barrel (6) fed by the feed member, and an extrusion screw (7) arranged inside the barrel (6) and making it possible for the polymer to melt gradually to form an extrusion composition and for this composition to be transported along the extrusion screw (7) to a distal end (21) of the extrusion screw (7). The extrusion screw (7) extends along a longitudinal axis (A). The extrusion screw has a barrier zone having at least two threads with an extrusion head (8) arranged at a distal end (21) of the extrusion screw (7) and configured to apply the composition around an elongated electrically conductive element. At least one liquid injection channel (22) is formed in the extrusion screw (7).

Abstract: A method for manufacturing an electric cable includes a step of mixing an extrusion composition having at least one thermoplastic polymer in the form of solid particles, a dielectric liquid and at least one nanofiller, a step of introducing the extrusion composition into a feed zone of a barrier screw which zone is situated at the inlet of the extruder, and a step of applying the extrusion composition coming from the prior step around an elongate electrically conducting element at the head of the extruder. The mixing step includes a step of premixing the dielectric liquid with the at least one nanofiller to obtain an intermediate composition which is then mixed with the at least one thermoplastic polymer in order to obtain the extrusion composition.

Abstract: The invention relates to a process for manufacturing a cable comprising at least one electrically insulating layer obtained from a polymer composition comprising at least one polypropylene-based thermoplastic polymer material, at least one dielectric liquid, and at least one thermally conductive inorganic filler, said process involving the mixing of the thermally conductive inorganic filler with the dielectric liquid to form a filler-charged dielectric liquid prior to placing the dielectric liquid in contact with said thermoplastic polymer material.

Abstract: A process is provided for manufacturing a cable having at least one electrically insulating layer obtained from a polymer composition having at least one thermoplastic polymer material based on polypropylene and polyethylene, at least one dielectric liquid, and at least one thermally conductive inorganic filler. The process includes the premixing of the thermally conductive inorganic filler with the polyethylene.

Abstract: The invention relates to a cable comprising at least one electrically insulating layer obtained from a polymer composition comprising at least one homophasic propylene polymer, and at least one homophasic ethylene polymer having an elastic modulus greater than 300 MPa, said propylene and ethylene polymers being in specific proportions.

Abstract: An electrical cable or electrical cable accessory includes at least one semiconducting layer, and at least one electrically insulating layer, at least partially in direct contact with the semiconducting layer. The electrically insulating layer is obtained from an insulating polymer composition having a thermoplastic polymer material, and the semiconducting layer is at least partially crosslinked.

Abstract: The present invention relates to an electric cable comprising at least one semiconductive layer obtained from a polymer composition comprising at least one homophasic propylene polymer and at least one homophasic copolymer of a C3-C6 olefin and ethylene.

Abstract: A polymer composition is provided with improved stress whitening resistance, having at least one thermoplastic polymer material and a dielectric liquid. A process for preparing the polymer composition, a cable having at least one electrically insulating layer obtained from the polymer composition, and a process for preparing the cable are also provided.

Abstract: A polymer composition is provided with improved stress whitening resistance, having at least one thermoplastic polymer material and a dielectric liquid. A process for preparing the polymer composition, a cable having at least one electrically insulating layer obtained from the polymer composition, and a process for preparing the cable are also provided.

Abstract: A polymer composition has at least one polypropylene-based thermoplastic polymer material and a dielectric liquid. The dielectric liquid has at least one mineral oil and at least one polar compound of the benzophenone type, acetophenone type or a derivative thereof.

Abstract: A polymer composition has at least one thermoplastic polymer material and a dielectric liquid of improved polarity, to a process for preparing said polymer composition, to a cable comprising at least one electrically insulating layer obtained from the polymer composition, and to a process for preparing the cable.

Abstract: An electric cable has at least one semi-conductive layer obtained from a polymer composition having at least one polypropylene-based thermoplastic polymer material, at least one first antioxidant and at least one metal deactivator.

Abstract: The invention relates to a cable comprising at least one electrically insulating layer obtained from a polymer composition comprising at least one polypropylene-based thermoplastic polymer material and at least one inorganic filler chosen from silicates, boron nitride, carbonates, and a mixture thereof, and to a process for preparing said cable.

Abstract: The invention relates to a process for the manufacture of an electric cable comprising an extruded thermoplastic layer obtained from a composition comprising at least one dielectric liquid and at least one thermoplastic polymer chosen from a propylene homopolymer and copolymer, and also to a cable obtained by said process.

Abstract: An electrical cable (100, 101) includes at least one elongated electrical conductor (1), at least one protective element (4, 41, 42) surrounding the elongated electrical conductor (1), and at least one filling compound (5) surrounded by said protective element (4, 41, 42). The filling compound (5) has more than 20.0% by weight of a mineral oil, relative to the total weight of the filling compound, and at least one nanofiller.

Abstract: A cable is provided having at least one electrically insulating layer obtained from a polymer composition with at least one polypropylene-based thermoplastic polymer material and at least one inorganic filler selected from aluminium oxide, a hydrated aluminium oxide, magnesium oxide, zinc oxide, and a mixture thereof; and a method for making the cable.