367results about "Inhomogenous insulation material" patented technology

A field grading material includes a field grading effective amount of a nanoparticle filler distributed in a polymeric matrix, and the nanoparticle filler is heterogeneously distributed in the polymeric matrix.

The present invention provides a solution to the above-described drawbacks, and more specifically, as the tape-like or sheet-like insulation member, the resin matrix in which the first particles having a heat conductivity of 1 W / mK or higher and 300 W / mK or lower, that are diffused in the resin matrix, and the second particles having a heat conductivity of 0.5 W / mK or higher and 300 W / mK or lower, are diffused, is employed.

The invention provides a submicron magnesium hydroxide particulate composition comprising a first distribution of magnesium hydroxide particles having a D50 of no more than about 0.30 μm, a D90 of no more than about 1.5 μm, and a BET surface area of at least about 35 m2 / g, which can be used as a flame-retardant additive for synthetic polymers, optionally in combination with other flame-retardant additives such as nanoclays and larger-sized magnesium hydroxide particulate compositions. Polymeric resins comprising the submicron magnesium hydroxide particles and methods of manufacturing submicron magnesium hydroxide particles are also provided.

An electrical insulation paper that is made of mica flakelets (22), having an average size range of 0.01 to 0.05 mm in their thinnest dimension, hexagonal boron nitride (26), which has an average size range of 10 to 1,000 nm in their longest dimension, and a resin matrix. The mica flakelets and the hexagonal boron nitride are mixed and formed into a paper (17), and the resin is added to the paper after formation, the ratio by weight of the hexagonal boron nitride to the mica flakelets is directly proportional to the average size of the hexagonal boron nitride compared to the average size of the mica flakelets, within an adjustment factor.

Described herein are foamable compositions and methods of making foamed compositions. The foamable composition comprises at least one polymer and a foaming agent. The foaming agent comprises a talc or a talc derivative. The polymers described herein comprise a substantially non-halogenated polymer. One or more additives are added to render the compositions flame retardant and / or smoke suppressant. Also described are Power over Ethernet (PoE) cables, having at least one electrical conduit comprising an electrically conductive core, an insulation that at least partially surrounds said electrically conductive core and a polymeric separator extending from a proximal end to a distal end and having at least one channel adapted for receiving the at least one electrical conduit. The PoE cables are capable of carrying about 1 watt to about 200 watts of power.

A shielded wire includes a carbon nanostructure (CNS)-shielding layer including a CNS material in a matrix material, the CNS-shielding layer being monolithic and disposed about a dielectric layer and a conducting wire, wherein the dielectric layer is disposed between the CNS-shielding layer and the conducting wire. An extruded thermoplastic jacket includes a CNS material, the extruded thermoplastic jacket being configured to protect at least one wire. A thermoplastic article includes a CNS-infused fiber material and a flexible thermoplastic.

Disclosed is an anisotropic-electroconductive adhesive, which includes an insulating adhesive component containing a radical polymerizable compound and a polymerization initiator; and a plurality of insulating coated electroconductive particles dispersed in the insulating adhesive component, the insulating coated electroconductive particle having a coating layer made of insulating thermoplastic resin on a surface of an electroconductive particle, wherein a softening point of the insulating thermoplastic resin is lower than an exothermic peak temperature of the insulating adhesive component. The anisotropic-electroconductive adhesive enables rapid curing of the insulating adhesive component at a low temperature and is very useful for making a circuit connection structure since it may prevent a short of circuit without connection failure even when the electroconductive particles are condensed.

A composite magnetic material including a resin and generally spherical magnetic metal particles of at least one type dispersed in the resin and consisting essentially of single crystal grains, the metal particles having a mean particle size of 0.1 to 10 μm and each having an insulating coating layer at least partially coated thereon.

In one embodiment of the present invention as used for impregnating a composite tape (56) with HTC particles provides for permeating a fabric layer (51) of the composite tape with HTC particles and impregnating an impregnating resin into the composite tape through the fabric layer (51). At least 5% of the HTC particles permeated into the fabric layer are carried out of the fabric layer and into a mica layer (52) bound to the fabric layer by the impregnating resin. In some embodiments the impregnating resin itself contains HTC particles.

There is provided a coating composition comprising (A) a thermoplastic non-fluorine-containing polymer, (B) inorganic ferroelectric particles, (C) an affinity-improving agent comprising at least one of a coupling agent, a surfactant and an epoxy group-containing compound, and (D) a solvent, and there is provided a film formed using the coating composition which has highly dielectric property and low dielectric loss, can be made thin, is excellent in winding property (flexibility) and is suitable as a highly dielectric film for a film capacitor.

The present invention is directed towards methods of oil and gas well logging, monitoring, and the field of electrically powering submersible devices like electrical motors in oil and gas wells.

Provided is a DC power cable including a conductor, an inner semiconductive layer, an insulation and an outer semiconductive layer. In particular, the inner semiconductive layer or the outer semiconductive layer may be formed from a semiconductive composition containing a polypropylene base resin or a low-density polyethylene base resin and carbon nano tubes; and the insulation may be formed from an insulation composition containing a polypropylene base resin or a low-density polyethylene base resin and inorganic nano particles. The resulting power cable may have improved properties such as volume resistivity, hot set, and so on, and excellent space charge reducing effect.

The present invention relates to phase separated siloxane-hydrocarbon copolymer surfaces which are hard and hydrophobic and can be superhydrophobic by the addition of nanoparticles. More specifically the siloxane oligomer / polymer precursor is terminated with (a) chemically reactive group(s). The bond between the siloxane moiety and the hydrocarbon functional moiety is a Si atom directly bonded to a carbon atom. It is applied (for example) to the entire surface of a fibre reinforced and void-free polymer concrete core with 60 to 88% polymeric and inorganic fillers for application as a high voltage insulator. The product has high mechanical strength, impact resistance and good electrical insulation properties. The coating provides good UV resistance, hydrophobicity and a hard self-cleaning surface for use as outdoor high voltage electrical insulator in areas of high pollution with low leakage currents when energised and can also be applied to other products.

An insulation shield material is provided having improved performance without the need for expensive additives, complex polymer formulations, or specially prepared carbon black. The semiconductive composition used to make the strippable semiconductive insulation shield layer in contact with the outer surface of a wire and cable insulation layer has a base polymer having a weight average molecular weight of not more than 200,000, an adhesion modifying additive system having at least two components and a conductive carbon black. Each of the adhesion modifying additive system components is different from the base polymer. The first component of the adhesion modifying additive system contains a hydrocarbon wax or ethylene vinyl acetate wax and the second component of the adhesion modifying additive system contains an amide wax.

A fire resistant polymeric composition which forms a target mineral on firing of the polymeric composition including 20-60 wt % of an organic polymer; 2-30 wt % of a magnesium compound that oxidises to form MgO; and 5 to 30 wt % silica. The composition preferably includes an alkaline earth metal borosilicate compound, the alkaline earth metal borosilicate compound forming a ceramic composition at an elevated temperature.

Disclosed herein is an article comprising an electrical component and an electrically insulating layer disposed upon the electrical component, wherein the electrically insulating layer comprises a thermosetting polymer and a nanosized filler, wherein the nanosized filler comprises metal oxide and diamond nanoparticles that have an average largest dimension of less than or equal to about 200 nanometers.

A nonlinear composition comprises a polymeric material and at least one ferroelectric, antiferroelectric, or paraelectric particle, wherein the composition has a permittivity greater than or equal to about 5. A method of making a nonlinear composition comprises combining a polymeric material, and at least one ferroelectric, antiferroelectric, or paraelectric particle. The composition has a permittivity greater than or equal to about 5.

Provided is a composition comprising a polymeric material, a filler material dispersed in the polymeric material, the filler material comprising inorganic particles and a discontinuous arrangement of conductive material wherein at least a portion of the conductive material is in durable electrical contact with the inorganic particles, and conductive material dispersed in the polymeric material.

A heat-conductive dielectric polymer material having an inter-penetrating-network (IPN) structure includes a polymer component, a curing agent, and a heat-conductive filler uniformly dispersed in the polymer component. The polymer component includes a thermoplastic plastic and a thermosetting epoxy resin. The curing agent is used to cure the thermosetting epoxy resin at a curing temperature. The heat conductivity of the heat-conductive dielectric polymer material is larger than 0.5 W / mK. A heat dissipation substrate including the heat-conductive dielectric polymer material in the present invention has a thickness of less than 0.5 mm and bears a voltage of over 1000 volts.

In some embodiments, the present invention pertains to fluid compositions that generally comprise: (1) a base fluid; and (2) boron nitride-based materials dispersed in the base fluid. In some embodiments, the boron nitride-based materials may include hexagonal boron nitride. In some embodiments, the boron nitride-based materials in the fluid compositions may be less than about 1% of the weight of the fluid composition. Additional embodiments of the present invention pertain to methods of making fluid compositions. Such methods generally include dispersing boron nitride-based materials in a base fluid, such as by mixing. In some embodiments, the methods of the present invention may also include steps of exfoliating or sonicating the bulk boron nitride-based materials followed by centrifugation and drying procedures.

A dielectric material is disclosed comprising a plurality of substantially longitudinally oriented wires which are coupled together, wherein each of the wires includes a conductive core comprising a first material and one or more insulating shell layers comprising a compositionally different second material disposed about the core. In one embodiment, a dielectric layer is disclosed comprising a substrate comprising an insulating material having a plurality of nanoscale pores defined therein having a pore diameter less than about 100 nm, and a conductive material disposed within the nanoscale pores. Methods are also disclosed to create a dielectric material layer comprising, for example, providing a plurality of wires, wherein each of the wires includes a core comprising a first material and one or more insulating layers comprising a compositionally different second material disposed about the core; substantially longitudinally orienting said plurality of wires along their long axes; coupling the wires together; and depositing an insulating coating on at least one of a top and / or a bottom end of the wires.

A power cable can include a conductor and a layer disposed radially about the conductor where the layer includes graphene nanosheets in a polymeric matrix.

Disclosed herein are compositions comprising a. from 35 to 80 vol % of a thermoplastic polymer; b. from 5 to 45 vol % of a low thermally conductive, electrically insulative filler with an intrinsic thermal conductivity of from 10 to 30 W / mK; c. from 5 to 15 vol % of a high thermally conductive, electrically insulative filler with an intrinsic thermal conductivity greater than or equal to 50 W / mK; and d. from 5 to 15 vol % of a high thermally conductive, electrically conductive filler with an intrinsic thermal conductivity greater than or equal to 50 W / mK, wherein the composition is characterized by: i. a thermal conductivity of at least 1.0 W / mK; and ii. a volume resistivity of at least 107 Ohm.cm. Also disclosed are articles and methods of use therefor.

Disclosed is an insulation coating composition for a non-aromatic electrical sheet. The insulation coating composition for the non-aromatic electrical sheet, according to the present invention, comprises: a mixed metal phosphate comprising aluminum phosphate (Al(H3PO4)x=1~3) and cobalt phosphate (Co(H3PO4)3); an epoxy resin; and an organic-inorganic composite comprising silica (SiO2) nanoparticles which substitutes a functional group of the epoxy resin.

The present invention is related to ternary metal transition metal non-oxide nano-particle compositions, methods for preparing the nano-particles, and applications relating in particular to the use of said nano-particles in dispersions, electrodes and capacitors. The nano-particle compositions of the present invention can include a precursor which includes at least one material selected from the group consisting of alkoxides, carboxylates and halides of transition metals, the material including transition metal(s) selected from the group consisting of vanadium, niobium, tantalum, tungsten and molybdenum.