Prysmian S.p.a.

Nexans

Novamont S.p.a.

Prysmian Cavi E Sistemi Energia S.r.l.

Pirelli Cavi E Sistemi S.p.a.

Ausimont S.r.l.

Sanitaria Scaligera Spa

Himont Incorporated

Ministero Dell'universita E Della Ricerca Scientifica E Tecnologica

Pirelli Limited

Ministero Dell'univerita' E Della Ricerca Scientifica E Tecnologica

Antonio Marraccini

Gabriele Perego

Catia Bastioli

Sergio Belli

Dimitri Charrier

Christelle Mazel

Gian Domenico Cella

Enrico Albizzati

Vittorio Bellotti

Matthias Meyer

Xavier Festaz

Luciano Del Giudice

Sandro Montino

Rodolfo Sica

Christian Koelblin

Paolo Liboi

Alessandro Zuccato

Daphné Merle

Alberto Bareggi

Roberto Lombi

Andrea Gardano

Pietro Anelli

Cristiana Scelza

Roberto Candela

Gaia Dell'Anna

Franco Galletti

Massimiliano Mauri

Donald Ray Parris

Anthony Combessis

Antoni Niekraszewicz

Melek Maugin

Marcelo Paixao Dantas

Armando Michele Ferrari

Karolina Grzebieniak

Walid Bahloul

Mauro Cacciotti

Birane Toure

Jihane Sahyoun

Carlos Alberto Ferreira Godinho

Giovanni Guastalla

Valéry Alcaraz

Gavin Holden

Gaia Dell'anna

Donald Parris

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

Electrical cable or electrical cable accessory

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.

Polymer composition with improved stress whitening resistance

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.

Process for the manufacture of an electric cable by extrusion of a composition based on a propylene polymer and on a dielectric liquid

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.

Electric cable with improved thermal conductivity

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.

Electric cable with improved temperature ageing resistance

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.

Polymer composition comprising a dielectric liquid of improved polarity

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.

Electric cable having improved thermal conductivity

A cable includes at least one electrical conductor and at least one electrically insulating layer surrounding the electrical conductor, wherein the at least one electrically insulating layer includes: (a) a thermoplastic polymer material selected from: at least one copolymer (i) of propylene with at least one olefin comonomer selected from ethylene and an V-olefin other than propylene, the copolymer having a melting point greater than or equal to 130&#xb0; C. and a melting enthalpy of from 20 J/g to 90 J/g; a blend of at least one copolymer (i) with at least one copolymer (ii) of ethylene with at least one V-olefin, the copolymer (ii) having a melting enthalpy of from 0 J/g to 70 J/g; a blend of at least one propylene homopolymer with at least one copolymer (i) or copolymer (ii); a blend of at least one propylene homopolymer with at least one copolymer (i) or copolymer (ii); (b) at least one nano-sized filler; wherein at least one of copolymer (i) and copolymer (ii) is a heterophasic copolymer.

Energy cable

A method for manufacturing an electrical cable includes providing at least one core including an electrical conductor, and arranging at least one copper sheath around the at least one core. The arranging of the copper sheath includes providing at least one foil of copper having two opposite first edges; bending the foil of copper around the core until the first edges of the foil of copper are contacted with each other; welding the first edges of the foil of copper to each other to form a corresponding solder jointwelded joint; and deposing a copper coating on at least portions of the surface of the foil of copper at the welded joint. The deposing the copper coating is carried out by means of a thermal spray process.

Method of manufacturing power cables and related power cable

A medium-voltage or high-voltage power cable includes an elongated electrical conductor element, a first semiconducting layer, an electrically insulating layer, and a second semiconducting layer. The electrically insulating layer is at least one layer of a thermoplastic polymer material having a continuous polypropylene matrix in which a polyethylene is dispersed. A process for the preparation of such a cable is also provided.

Medium- or high-voltage electric cable

A process for producing an energy cable including at least one electrically conductive core and at least one thermoplastic electrically insulating layer, includes the steps of: impregnating a thermoplastic material in subdivided solid form, having a melting enthalpy equal to or lower than 70 J/g, with a dielectric fluid to obtain an impregnated thermoplastic material; feeding the impregnated thermoplastic material in subdivided solid form to a single-screw extruder; and extruding the impregnated thermoplastic material onto the at least one electrically conductive core, so as to form the at least one thermoplastic electrically insulating layer, whereby the impregnated thermoplastic material is not subjected to any mechanical homogenization step in a molten state. Energy cables having a large amount of the dielectric fluid in the electrically insulting layer, e.g. higher than 10 wt %, are obtained without showing any morphological defects in the layer itself and any drawbacks in the extrusion process, even when the rotation speed of the extruder screw, and therefore, the cable production speed, are high (e.g. higher than 20 m/min for medium voltage cable).

Process for producing an energy cable having a thermoplastic electrically insulating layer

A method for manufacturing power cables may include: providing at least one insulated conductor; and/or arranging a water barrier around the at least one insulated conductor. Arranging the water barrier may include: providing foil having opposite edges; wrapping the foil around the at least one insulated conductor until the edges of the foil overlap; fastening the overlapped edges of the foil to each other with bonding agent to form a corresponding foil seam; and/or depositing a metal coating on the foil at the seam by a thermal spray process. A power cable may include: at least one insulated conductor; at least one first water barrier surrounding the at least one insulated conductor, the at least one first water barrier being wrapped foil having edges overlapped and fastened by bonding agent, the overlapped edges and bonding agent forming a foil seam; and/or a thermal sprayed metal coating on the seam.

Method of manufacturing power cables

Submarine flexible pipe includes a metal flexible carcass, an inner polymeric liner arranged in a radially outer position with respect to the metal flexible carcass, a protective polymeric outer sheath and a mechanical armor structure arranged in a radially inner position with respect to the protective polymeric outer sheath, the mechanical armor structure being potentially exposed to water contact. The mechanical armor structure includes a pressure resistant armor and a tensile armor arranged in a radially outer position with respect to the inner polymeric liner. The mechanical armor structure includes a plurality of carbon steel elongated elements, each of the carbon steel elongated elements being coated by an aluminum cladding.

Submarine flexible pipe

A high-voltage alternate current electric cable [is provided. In the electric cable,] having at least one metallic electric conductor is surrounded by at least one extruded insulating layer. The insulating layer includes from 1 wt % to 30 wt % of a void-containing filler. The filler is made of particles having an average diameter up to 50 pm dispersed in an insulating polymeric material.

High-voltage electric cable

Growing community of inventors

Milan, Italy

Gabriele Perego