Magnet wire including extruded insulation formed from multiple layers of different materials is described. A magnet wire may include a conductor and insulation formed around the conductor. The insulation may include a first layer of extruded thermoplastic insulation formed around the conductor and a second layer of extruded thermoplastic insulation formed around the first layer of extruded thermoplastic insulation. The first layer may be formed from a first polymeric material having a first thermal index, and the second layer may be formed from a second polymeric material having a second thermal index higher than the first thermal index.

An opto-electrical cable may include an opto-electrical cable core and a polymer layer surrounding the opto-electrical cable core. The opto-electrical cable core may include a wire, one or more channels extending longitudinally along the wire, and one or more optical fibers extending within each channel. The opto-electrical cable may be made by a method that includes providing a wire having a channel, providing optical fibers within the channel to form an opto-electrical cable core, and applying a polymer layer around the opto-electrical cable core. A multi-component cable may include one or more electrical conductor cables and one or more opto-electrical cables arranged in a coax, triad, quad configuration, or hepta configuration. Deformable polymer may surround the opto-electrical cables and electrical conductor cables.

A Metal-Clad (MC) cable assembly is provided. In one approach, the MC cable assembly includes a core having a plurality of conductors laid parallel to one another, each of the plurality of conductors including an electrical conductor and insulation, with or without a jacket layer. The MC cable assembly further includes a metal sheath disposed over the core. In some approaches, the MC cable assembly further includes an assembly tape disposed around the plurality of conductors. In some approaches, the MC cable assembly further includes a subassembly having a set of conductors, and an assembly jacket layer disposed over the subassembly. In some approaches, a polymeric protective layer is provided over an insulation layer of one or more of the plurality of conductors and the subassembly. In some approaches, a bonding/grounding conductor may also be cabled with the plurality of conductors.

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.

The invention relates to a polymer composition comprising a polyethylene, a crosslinking agent and antioxidant(s), wherein the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B.sub.1≤B, wherein B.sub.1 is 0.12, when measured prior to crosslinking according to method ASTM D6248-98, the crosslinking agent is present in an amount which is Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z.sub.1≤Z≤Z.sub.2, wherein Z.sub.1 is 0.005 and Z.sub.2 is 2.0, and the antioxidant(s) is/are nitrogen containing antioxidant(s) being present in an amount which is W wt %, based on the total amount (100 wt %) of the polymer composition, and W.sub.1≤W≤W.sub.2, wherein W.sub.1 is 0.005 and W.sub.2 is 1.0, an article being e.g. a cable, e.g. a power cable, and processes for producing a polymer composition and an article; useful in different end applications, such as wire and cable (W&C) applications.

A cable includes: a conductor including strands densely arranged, the strands including out most strands located at outermost parts of the conductor and inner side strand located on inner side of the outermost strands; and an insulation covering that covers the periphery of the conductor. The insulation covering is in surface contact with the outermost strands, and is provided in a manner such that gaps are provided between the insulation covering and the inner side strands. In the method for manufacturing the cable, a fluid resin having a viscosity of greater than or equal to 323.6 Pa.Math.sec at the point of extrusion is used, and the extrusion pressure of the resin is adjusted in a manner such that the insulation covering is in surface contact with the outermost strands and such that gaps are provided between the insulation covering and the inner side strands.

A heat-resistant electric wire including a core wire and a coating that covers the core wire. The coating is formed from a modified fluorine-containing copolymer that is obtained by irradiating a copolymer with radiation at an exposure of 250 kGy or lower at a temperature of not higher than the melting point of the copolymer. The copolymer is at least one copolymer selected from a copolymer including a tetrafluoroethylene unit and a perfluoro(alkyl vinyl ether) unit and a copolymer including a tetrafluoroethylene unit and a hexafluoropropylene unit.

The direct-current cable includes a conductive portion; and an insulating layer covering an outer periphery of the conductive portion, the insulating layer containing cross-linked base resin and inorganic filler, the base resin containing polyethylene, a BET specific surface area of the inorganic filler being greater than or equal to 5 m.sup.2/g and less than or equal to 150 m.sup.2/g, and a mean volume diameter of the inorganic filler being less than or equal to 1.0 μm, the mass ratio of the inorganic filler with respect to the base resin being greater than or equal to 0.001 and less than or equal to 0.05, and the cross-linked base resin being cross-linked by a cross-linking agent containing organic peroxide.

In a method for printing a three dimensional structure, a continuous length of fiber that includes, interior to a surface of the fiber, a plurality of different materials arranged as an in-fiber functional domain, with at least two electrical conductors disposed in the functional domain in electrical contact with at least one functional domain material, is dispensed through a single heated nozzle. After sections of the length of fiber are dispensed from the heated nozzle, the sections are fused together in an arrangement of a three dimensional structure. The structure can thereby include a continuous length of fiber of least three different materials arranged as an in-fiber functional device, with the continuous length of fiber disposed as a plurality of fiber sections that are each in a state of material fusion with another fiber section in a spatial arrangement of the structure.

Provided are a core electric wire for multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for multi-core cable according to an aspect of the present invention comprises a conductor obtained by twisting element wires, and an insulating layer that covers an outer periphery of the conductor, in which, in a transverse cross section of the conductor, a percentage of an area occupied by void regions among the element wires is from 5% to 20%. An average area of the conductor in the transverse cross section is preferably from 1.0 mm.sup.2 to 3.0 mm.sup.2. An average diameter of the element wires in the conductor is preferably from 40 μm to 100 μm, and the number of the element wires is preferably from 196 to 2,450. The conductor is preferably obtained by twisting stranded element wires obtained by twisting subsets of element wires. The insulating layer preferably comprises as a principal component a copolymer of ethylene and an α-olefin having a carbonyl group.