A composition comprises, based on the total weight of the composition, 25 wt % to 50 wt % of a polyetherimide; and 50 wt % to 75 wt % of a polyphthalamide; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.

The present invention provides a wholly aromatic liquid crystalline polyester resin having an excellent heat resistance while having an extremely low dielectric tangent.

Provided are an active ester composition capable of exhibiting high curability and forming a cured product with various excellent properties such as low dielectric properties, a cured product thereof, and a semiconductor encapsulating material and a printed wiring board which are obtained using the active ester composition. The active ester composition includes, as essential components, an active ester compound (A) and a phenolic hydroxyl group-containing compound (B), in which the active ester compound (A) is an esterification product of a compound having one phenolic hydroxyl group in the molecular structure (a1) and an aromatic polycarboxylic acid or an acid halide thereof (a2). Also provided are a cured product thereof, and a semiconductor encapsulating material and a printed wiring board which are obtained using the active ester composition.

The present disclosure relates to insulation. Teachings thereof may be embodied in a solid insulation material, especially in tape form, the use thereof in a vacuum impregnation process and to an insulation system produced therewith, and also an electrical machine comprising the insulation system, especially for the medium- and high-voltage sector, namely for medium- and high-voltage machines, especially rotating electrical machines in the medium- and high-voltage sector, and to semifinished products for electrical switchgear. For example a solid insulation material with an anhydride-free impregnating agent may include: a carrier; a barrier material; a curing catalyst; and a tape adhesive. The curing catalyst and the tape adhesive are inert toward one another but react under the conditions of a vacuum impregnation process if combined with an anhydride-free impregnating agent having gelation times of 1 h to 15 h at impregnation temperature. The tape adhesive is free of oxirane groups and includes at least two free hydroxyl groups.

The invention relates to reinforced electric wires, particularly reinforced electric wires as used in holiday lighting such as Christmas light strings. In some embodiments, the reinforced electric wire has a conductor, a reinforcing string or one or more reinforcing threads, and an insulator jacket. In some embodiments, the conductor has a single conductor strand. In some embodiments, the conductor has a plurality of conductor strands. In some embodiments, the wire has an insulator jacket having a plurality of channels therein, where a conductor is passed through the center channel, and reinforcing threads are passed through the other channels.

An adhesive tape for jacketing an elongated item, more particularly cable sets, comprises a tapelike carrier which is characterized in that the tapelike carrier is provided on at least one side with a binder which is thermally softenable at a temperature of 50 C. to 100 C. and comprises a polycaprolactone.

A cable may include a include an inner conductor and an outer conductor coaxially arranged around the inner conductor. A dielectric strength member may be positioned between the inner and outer conductors. The dielectric strength member may have a tensile strength of at least 10,000 MPa. Additionally, a jacket may be formed around the outer conductor.

An electrical steel sheet has an insulation coating on a steel sheet surface. The insulation coating includes: a binder consisting of 100 parts by mass of a metal phosphate and 1 to 50 parts by mass of an organic resin having an average particle size of 0.05 to 0.50 m; and a carboxylic acid-containing compound with a carbon number of 2 to 50 in an amount of 0.1 to 10.0 parts by mass based on 100 parts by mass of solids content of the binder. The organic resin is at least one selected from the group consisting of acrylic resins, epoxy resins, and polyester resins. The insulation coating of this electrical steel sheet shows good edge corrosion resistance after blanking.

Provided is a film having excellent electrical insulation performance, heat dissipation performance, and workability. In addition, by using the film, provided are an electrical insulation sheet having excellent heat conductivity, a rotating machine using the sheet, an adhesive tape, and the like. The number of coarse projections SPc (4000) on at least one surface of the film is 15 projections/mm.sup.2 or greater.

A degradable cardiac pacing current-providing wire, comprising: conductive core; insulating film ,covering said conductive core, wherein said conductive core is made of magnesium alloy, the weight percentage of said magnesium alloy is: zinc 4.5-5.5%, manganese 0.8-1.2%, calcium 0.8-1.2%, and the remainder is magnesium, said insulating film is made of either or at least two copolymers of Polylactic acid (PLA), Polyglycolic acid (PGA), Polycaprolactone (PCL), Polydioxanone (PDS) and Polyhydroxyalkanoate (PHA). A cardiac pacing current-providing unit, for use in providing pacing current to the heart of the patient, comprising: wire; suture needle and connecting electrode which is connected to the cardiac pacemaker, there is no wire residue in the body after degradation, and no metal artifacts will occur, which makes the patients free from the need for re-operation, and reduces the mental, physical and economic burden caused by the operation, has a strong clinical application value.