An electrically insulated cable including: a core electric wire; and a covering layer covering the core electric wire; wherein: the core electric wire includes a plurality of insulated wires; the insulated wires each include a conductor and an insulating layer covering the conductor; and the covering layer contains a crosslinked polyethylene-based resin and a flame retardant in the front surface side thereof.

The invention provides a polymer composition comprising a) a low density polyethylene (LDPE); and b) a conjugated aromatic polymer. The invention also relates to cables comprising said polymer composition and the use of the polymer composition in the manufacture of an insulation layer of cable.

A molded cable comprises a conductor, an insulation inner layer, an insulation outer layer, and a resin molded body. The insulation inner layer comprises a crosslinked ethylene resin composition and is provided an outer circumference of the conductor. The insulation outer layer comprises a crosslinked thermoplastic polyurethane composition and is provided on an outer circumference of the insulation inner layer. Arithmetic average roughness (Ra) of a surface of the insulation outer layer is 5 μm to 100 μm. The resin molded body coats an exposed end portion of the conductor and an end portion of the insulation outer layer at a side of the exposed end portion of the conductor. The resin molded body is fused to the insulation outer layer.

The present disclosure relates to a high-voltage (HV) bushing comprising a condenser core configured for surrounding a HV electrical conductor. The condenser core comprises an insulation material comprising wound layers of a permeable solid material impregnated with a thermo-reversible gel. The gel comprises an oil and a thickener, the oil comprising iso-paraffinic oil in an amount within the range of 0.1-100 wt % of the oil and the thickener comprising at least one copolymer in an amount within the range of 0.1-10 wt % of the gel.

An insulated nanofiber having a continuous nanofiber collection extending along a longitudinal axis with an outside surface and an inside portion is described. A first material infiltrates the inside portion, where the outside surface of the nanofiber collection is substantially free of the first material. An electrically-insulating second material coats the outside surface of the nanofiber collection. A method of making an insulated nanofiber collection is also disclosed.

The present disclosure provides a composition. The composition is crosslinkable and includes an ethylene silane-copolymer, an oil-extended ethylene-propylene-diene monomer (EPDM), and a crosslink catalyst. The present disclosure also provides the composition after crosslinking. In an embodiment, a crosslinked composition is provided and includes from 55 wt % to 85 wt % of an ethylene-silane copolymer and from 15 wt % to 45 wt % of an oil-extended EPDM. The crosslinked composition has: (a) a flexural modulus of 50 MPa to 160 MPa; and (b) a hot set elongation greater than 10%. The crosslinked composition can be used as a coating for a coated conductor.

A polymeric composition includes 10 wt % to 80 wt % of a silane-grafted ethylene polymer based on a total weight of the polymeric composition. The silane-grafted ethylene polymer has a silane content of 0.40 mol % to 1.50 mol % based on a total moles of the silane-grafted ethylene polymer and the ethylene polymer used to make the silane-grafted ethylene polymer has a polar comonomer content of less than 15 wt % based on a total weight of the ethylene polymer. The polymeric composition also includes 10 wt % to 80 wt % of a flame-retardant filler based on a total weight of the polymeric composition.

An object of the present disclosure is to provide an insulating film or dielectric film comprising a fluoropolymer and having electrical insulation and hardness. The present disclosure relates to an insulating film or dielectric film comprising a fluoropolymer, wherein the fluoropolymer comprises, as a main component, a monomer unit represented by formula (1):

##STR00001##

wherein
R.sup.1 to R.sup.4 are each independently a fluorine atom, a fluoroalkyl group, or a fluoroalkoxy group.

Provided is an electromagnetic dielectric material (1). The electromagnetic dielectric material (1) is a column structure. The electromagnetic dielectric material (1) includes an inner core (11), a first foam layer (12) and a second foam layer (13) sequentially arranged from inside to outside on the cross section of the column structure. The first foam layer (12) and the second foam layer (13) are each a layer formed from a foam material foamed. The electromagnetic dielectric material further includes metal wires (14). The metal wires (14) are disposed in the longitudinal direction of the column structure, are not in contact with each other and are evenly distributed on the periphery of the first foam layer (12). Further provided is a method for producing an electromagnetic dielectric material (1).

A resin composition contains propylene and ethylene and has a melting point of 140° C. or more and 150° C. or less, and an enthalpy of fusion of the resin composition is 60 J/g or more and 100 J/g or less.