An insulated electric conductor includes a flat or round wire made of one or more electrically conductive materials, the flat or round wire having an exterior surface that is free of an oxide layer; and an insulating layer adhering directly to the oxide-layer-free exterior surface to form a coating around the oxide-layer-free exterior surface, the insulating layer being made of at least one thermoplastic material which provides electrical insulation. The flat or round wire is designed to conduct an electrical current.

A cable including a conductor surrounded by a covering layer, the covering layer formed from a thermoplastic vulcanizate composition which includes a continuous phase and a dispersed phase. The continuous phase is formed of a thermoplastic polyolefin. The dispersed phase is formed of a cross-linked elastomeric polyolefin. The thermoplastic vulcanizate composition passes the Hot Creep Test at 150 C. in accordance with UL 2556 (2013) and has a dielectric loss of 3 or less. Methods of forming cables with coverings are also disclosed.

A system and method for degassing cables, such as e.g. High-Voltage Alternative Current (HVAC) or High-Voltage Direct Current (HVDC) cables, where the system has a reel having a perforated cylinder wall and sealing elements adapted to seal off the inner space of the reel, a gas duct in fluid connection with the inner space, and a source of pressurised and heated gas fluidly connected to the gas duct. The method incudes winding a cable onto the reel and blow heated and pressurised gas into the inner space of the reel/cylinder.

A busbar includes: an elongated busbar body which is composed of an electrically conductive material; and an insulating coating which covers the circumference of the busbar body. The cross section of the busbar body orthogonal to the longitudinal direction is substantially rectangular. The insulating coating is composed of a light curing resin which has an elongation percentage of not less than 50% after being cured and a Young's modulus of not more than 900 MPa. And the insulating coating is formed by applying the light curing resin onto the surface of the busbar body and then curing the applied light curing resin. The light curing resin has a viscosity of 10 to 1000 Pa.Math.s at 25 C.

The present disclosure provides an electric wire having excellent smoothness, appearance, and storage stability. The electric wire includes a core wire and a coating layer covering the core wire. The coating layer contains a fluorine-free resin and a fluorine-containing crystalline polymer. The fluorine-free resin includes at least one selected from the group consisting of polyamide resins, polyolefin resins, and polyvinyl chloride resin. The fluorine-containing crystalline polymer represents 0.5 to 4.0 mass % relative to the fluorine-free resin.

A method for producing an elongated product. By an extrusion unit, a material is extruded onto a core of the elongated product as a casing having a predetermined wall strength. Downstream of the extrusion unit and while the material is still moldable, the elongated product is supplied in a conveying direction to a molding unit. A portion of the material is held by the molding unit and, from the held material, a molded part is formed in an integral manner on the casing. The formation of the molded part is thereby carried out in an advantageous manner, via a deformation of material of the casing.

The invention provides a composition capable of providing an electric wire with small fluctuations in the wire diameter. The composition includes a modified polytetrafluoroethylene (A) having a cylinder extrusion pressure of 80 MPa or lower at a reduction ratio of 1600 and a non-fibrillatable low-molecular-weight polytetrafluoroethylene (B).

The invention provides a method for producing an electric wire with a low dielectric loss. The method for producing an electric wire includes a coating step of coating a core wire with a mixture of a high-molecular-weight polytetrafluoroethylene (A) and a non-fibrillatable low-molecular-weight polytetrafluoroethylene (B); a first heating step of heating the coated core wire up to the first melting point of the low-molecular-weight polytetrafluoroethylene (B) or higher; a second heating step of heating the coated core wire to 150 C. to 300 C.; and a cooling step of cooling the coated core wire.

An insulation wire 10 according to the invention includes: a conductor 11 of any shape; an insulation film 12 made of a first thermoplastic resin that is formed around the conductor 11; and a self-bonding layer 13 made of a second thermoplastic resin that is formed around the insulation film 12 and has a self-bonding property, wherein the first thermoplastic resin contains at least one of polyphenylene sulfide and polyether ether ketone, and wherein the second thermoplastic resin contains a thermosetting resin and an inorganic filler.

A method of forming a twisted pair of wires for use with Ethernet-based networks. At least two wires are extruded with a cross-linked polyolefin insulating composition marketed under the registered trademark, EXRAD. The wires are twisted together with a consistent lay length to form a cable. The cable is irradiated to become thermoset. Electrical properties of the extruded wire are controlled during the extrusion step and concentricity of the wire and surrounding insulation is also monitored and controlled. The cable can be jacketed to provide greater mechanical protection.