Magnet wire with flexible corona resistant enamel insulation may include a conductor and a multi-layer insulation system formed around the conductor. The insulation system may include a basecoat formed from first polymeric enamel insulation, a midcoat formed from second polymeric enamel insulation, and a topcoat formed from third polymeric enamel insulation. The midcoat may include a filler containing silica dioxide and chromium oxide dispersed in a base polyamideimide material. Additionally, the magnet wire may exhibit few or no cracks in the topcoat when the wire is bent 180 degrees around a 4 mm mandrel.

The disclosed concept pertains to thermoplastic based materials, e.g., thermoplastic based composites, that are suitable replacements for known thermoset based materials, e.g., unsaturated polyesters, as insulators for circuit protection in electrical contact/non-contact applications, such as, but not limited to, housings, casings, enclosures, encapsulated or over-molded parts. In certain embodiments, the thermoplastic based materials house miniature circuit breakers, and arc and ground fault circuit breakers.

A cable including a plurality of internal insulated cores, each of which is formed by covering a conductor including a twisted wire with an insulator. The insulators have a tensile elastic modulus higher than that of a vinyl chloride resin for an electric wire and has a friction coefficient lower than that of the vinyl chloride resin for an electric wire. The cable may be a cab tire cable or a cab tire cord of a home appliance, a standard charger, or an on-board charger, for example, and is able to withstand long use without buckling breakage of the conductors.

An insulating film of the present invention includes a resin formed of polyimide, polyamide-imide, or a mixture thereof, and ceramic particles having a specific surface area of 10 m.sup.2/g or more, in which the ceramic particles form aggregated particles and a content of the ceramic particles is in a range of 5 vol % or more and 60 vol % or less.

A bushing for a metal clad medium voltage switchgear includes: a hollow body. The body is made of polyamide. A first end of the body connects to a compartment of the medium voltage switchgear. A second end of the body connects to a T-off and pin. In an embodiment, a body portion extends from the first end of the body to the second end of the body. The body portion is circular shaped about an axis extending from the first end of the body to the second end of the body.

The present invention relates to high-voltage components, especially for electromobility, comprising polymer compositions based on at least one polyamide and at least one pigment system based on mixed oxides containing titanium dioxide, tin oxide and zinc oxide, and to the use of such a pigment system for production of polyamide-based high-voltage components or for marking of polyamide-based products as high-voltage components by laser.

There is provided a partial discharge-resistant paint that is excellent in the dispersibility of alumina particles, has an industrially suitable viscosity, and can form a coating that is excellent in partial discharge resistance and insulating properties. A partial discharge-resistant paint comprising at least one heat-resistant resin selected from the group consisting of a polyamide resin, a polyimide resin, a polyimide resin precursor, a polyamide-imide resin, a polyetherimide resin, and a polyester-imide resin; alumina particles having an aspect ratio of 2 to 99, and represented by the formula: Al.sub.2O.sub.3.nH.sub.2O; at least one selected from the group consisting of an organophosphorous compound, a sulfonic acid compound, an amic acid compound, a triazole compound, a compound represented by formula (A) below, a compound represented by formula (B) below, a compound represented by formula (C) below, citric acid, ethylenediaminetetraacetic acid, and an ethylenediaminetetraacetic acid derivative; and a solvent, wherein the solvent comprises 90% by mass or more of a solvent having a boiling point of 100° C. or more at a pressure of 1 atm, the alumina particle content is 10 to 30% by mass relative to a total of 100% by mass of the heat-resistant resin and the alumina particles, and a total content of the heat-resistant resin and the alumina particles is 10 to 30% by mass.

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A wire harness includes a multi-core cable including a group of cables composed of a plurality of cables, and a sheath provided around the group of cables, and a resin mold covering the group of cables at a cable branching portion where the group of cables exposed from an end of the sheath of the multi-core cable are branched. An outermost layer of each cable constituting the group of cables includes polyolefin or thermoplastic polyurethane. When the sheath includes polyolefins, the group of cables includes at least one cable including an outermost layer including thermoplastic polyurethane. When the sheath includes thermoplastic polyurethane, the group of cables includes at least one cable having an outermost layer comprising polyolefin. The resin mold includes a resin composition of a polymer alloy of a first polymer including at least one of polyamide polymer, polyester polymer, and thermoplastic polyurethane and a second polymer including polyolefin.

In the insulation sheet, an insulation resin layer made of a thermosetting resin composition in an uncured or semi-cured state is formed on one or each of both surfaces of the base material. The thermosetting resin composition contains: a thermosetting resin (A) that is in solid form at 25° C.; a thermosetting resin (B) that is in liquid form at 25° C.; a latent curing agent that is unreactive at 60° C. or lower; and an inorganic filler having a maximum particle diameter smaller than a film thickness of the insulation resin layer and having an average particle diameter smaller than 0.5 times the film thickness. The insulation resin layer of the insulation sheet is efficiently compressed into a predetermined thickness by pressure application at normal temperature and permeates a gap between a stator core and a stator coil by heating during curing treatment, whereby both members can be insulated and fixed.

Magnet wire with corona resistant enamel insulation may include a conductor, and at least one layer of polymeric enamel insulation may be formed around the conductor. The polymeric enamel insulation may include a filler dispersed in a base polyamideimide material. The filler may include between 20 percent and 80 percent by weight of silica dioxide and between 20 and 80 percent by weight of titanium dioxide. Additionally, the polymeric enamel insulation may have a thermal index of at least 230° C. and a thermal index that is at least twice that of the base polymeric material.