摘要:
A composition containing a continuous phase called sea phase and discrete, isolated dispersed domains in and surrounded by the continuous phase called island phase. The continuous phase contains thermally conductive, electrically insulative fillers and the isolated phase contains thermally conductive fillers that could be electrically conductive. A polymer composite material formed from the composition has high thermal conductivity with good electrical insulation suitable for a thermal management component.
摘要:
An article comprises fully hydrolyzed polyvinyl alcohol fibers, an inorganic filler, and a polymer binder. The article can be formed as an electrically insulating saturated nonwoven sheet for electrical equipment, such as a liquid filled transformer, which can be substantially cellulose free.
摘要:
A multilayer insulated wire having an electroconductor and two or more extruded insulating layers covering the electroconductor, wherein at least one of the insulating layers is formed by a polyethersulfone resin (i) or a resin mixture (ii) comprising 100 parts by mass of at least one resin (A) selected from a polyetherimide resin and a polyethersulfone resin and 10 parts or more of at least one resin (B) selected from among a polycarbonate resin, a polyarylate resin and a polyamide resin, and at least one layer other than the insulating layer formed by the resin (i) or the resin mixture (ii) is arranged outside the insulating layer and is formed by a polyphenylenesulfide resin; and a transformer using the multilayer insulated wire.
摘要:
A multilayer insulated wire comprising a conductor and two or more solderable extruded insulating layers covering the conductor, wherein at least one of the insulating layers is made from a mixture comprising 100 parts by weight of at least one resin (A) selected from the group consisting of polyether imide resins and polyether sulfone resins, at least 10 parts by weight of at least one resin (B) selected from the group consisting of polycarbonate resins, polyarylate resins, polyester resins and polyamide resins, and 15 to 200 parts by weight of an inorganic filler (C); and transformers made by using the wire. The wire is excellent in heat resistance, solderability, high-frequency characteristics and workability in coiling, and is also suitable for industrial production. The transformers made by using the wire exhibit excellent electrical characteristics, and do not suffer from deterioration in the electrical characteristics and are protected from the influence of heat build-up even when a high frequency is used, thus being highly reliable.
摘要:
A polymeric composition having a high dielectric constant which varies little with temperature is made from a thermoplastic polymer, a high dielectric ceramic having a dielectric constant of at least about 50 at 1.0 GHz and 20 DEG C, and a second ceramic material having a dielectric constant of at least about 5.0 at 1.0 GHz and 20 DEG C, where the high dielectric ceramic and the second ceramic material have temperature coefficients that are opposite in sign from one another.
摘要:
A foamed thermoplastic material includes a thermoplastic material exhibiting, in its unfoamed state, a particular flammability index, flame growth rate, and specific extinction area. The foamed thermoplastic material further includes a plurality of cells having a number average mean diameter of 5 to 150 micrometers present in an amount effective to provide the foamed thermoplastic material with a density that is 10 to 90 percent of the density of the unfoamed thermoplastic material. The foamed thermoplastic material exhibits a desirable tensile elongation and dielectric constant. A process for forming the foamed thermoplastic material, articles including the foamed thermoplastic material, and an article-forming process are also described.
摘要:
Adhesive compositions are described that significantly improve the adhesion of polymer overmold compositions to metal substrates in polymer-metal junctions. The adhesive compositions include one or more poly(aryl ether) polymers, where each of the poly(aryl ether) polymers is, independently, a poly(aryl ether sulfone) polymer or a poly(aryl ether ketone) polymer. The overmold composition includes at least one poly(aryl ether ketone) polymer. Polymer-Metal junctions can be formed by, for example, dip-coating, spin-coating, extruding, or injection molding the adhesive composition and/or the overmold composition onto the metal substrate. Desirable applications settings for the polymer-metal junctions described include, but are not limited to electrical wiring.
摘要:
A cross filler for arrangement within a LAN cable has a plurality of twisted pair conductors (12). The filler has a body (21) and a plurality of radially extending arms (20), where each of the arms has a plurality of alternating supports and cavities along the surface of the arms. At least one of the radially extending arms is disposed within the LAN cable between at least two of the twisted pairs of the plurality of twisted pairs. The at least one of the radially extending arms is dimensioned such that when the cross filler is positioned with the cable, the at least two of the twisted pairs of the plurality of twisted pairs, on either side of the radially extending arm therebetween, rests on at least one of the supports on the radially extending arm.