68results about "Inhomogenous insulation material" patented technology

An electric winding assembly includes a conductor core having a first end and an opposing second end, an insulation layer overlying the conductor core, and a conductive shield layer overlying the insulation layer. The conductive shield layer includes an insulative carrier circumferentially surrounding the insulation layer and a conductive layer disposed on the insulative carrier, the insulative carrier formed from a material having a thermal rating greater than 180° C., the conductive shield layer having a surface resistivity between 1.5 and 10 ohms per square.

The present invention relates to a method for preparing an electrical cable comprising a step of applying an insulating layer around at least one elongated electrically conductive element from a polymer composition, wherein mineral precursors are introduced into the polymer composition prior to said application, which are then converted into mineral particles. The invention also relates to cables obtained according to this method that comprise mineral particles within their insulating layer, and which are particularly well suited for the transmission of medium- or high-voltage direct current. Figure for the abstract: NONE

In one aspect, the insulating composition is an insulating composition including solids in an amount of 35% by weight or less based on the total weight, wherein the solids include inorganic particles and a polymer material, and the insulating composition has a viscosity of 4,000 mPa·s or more at a shear rate of 0.0251 s-1 and a viscosity of 400 mPa·s or less at a shear rate of 251 s-1. The insulating composition has low viscosity at high shear rates and high viscosity at low shear rates, thereby providing excellent coating processability and enabling formation of a narrow insulation width by minimizing sliding portions during insulating layer formation, which can prevent the problem of reversal of the positive electrode / negative electrode capacity ratio that may occur due to sliding portions.

The present application discloses a thermally conductive, electrically insulating film, comprising a thermoplastic resin occupying 15%-50% of the weight of the thermally conductive, electrically insulating film, and a thermally conductive filler occupying 40%-70% of the weight of the thermally conductive, electrically insulating film, the thermally conductive filler including a thermally conductive carbon-based filler, a thermally conductive metal oxide or hydroxide filler, and a thermally conductive ceramic filler. The thermally conductive, electrically insulating film is used in electronic products or devices to provide the electronic products and devices with excellent heat dissipation capability as well as to meet the insulation requirements of the electronic products and devices. Meanwhile, such a thermally conductive, electrically insulating film is further characterized by excellent flame retardancy and mechanical properties to meet the requirements of the operating environment.

The invention relates to conductive textile yarns, threads, or strands for textile-technological structure production, in particular for electronic textiles with active and / or passive electronic components, wherein the yarn, thread, or strand has an electrically insulating sheath or coating around its core. According to the invention, the sheath or coating has thermally meltable properties and, while maintaining its high resistance, is provided with a homogeneous doping of conductive microparticles, wherein a local, time-controlled application of temperature and pressure to the sheath or coating allows for the creation of a localized, electrically conductive access point to the core.

An electric winding assembly (100), (200), includes a conductor core (108) having a first end (110) and an opposing second end (112), an insulation layer (114) overlying the conductor core (108), and a conductive shield layer (116) overlying the insulation layer (114). The conductive shield layer (116) includes an insulative carrier (117) circumferentially surrounding the insulation layer (114) and a conductive layer (118) disposed on the insulative carrier (117), the insulative carrier (117) formed from a material having a thermal rating greater than 180°C, the conductive shield layer (116) having a surface resistivity between 1.5 and 10 ohms per square.

A dielectric that has excellent electrical characteristics and causes no blistering of a copper foil during production of a copper-clad laminate using the dielectric, and a method for producing the same are provided. Further, a copper-clad laminate using the dielectric, and a method for producing the same are provided. The dielectric has a residual organic matter content of 500 μg / g or less. The metal-clad laminate has the dielectric and a metal foil.

A production method for a treatment solution for forming an insulating coating. The method includes mixing a solution A containing, on a PO43− basis, 0.20 mol / L or more and 10 mol / L or less of at least one of (i) phosphoric acid and (ii) a phosphate salt, and containing, on a metal basis, less than 0.50 mol / L of one or more particulate metal compounds, and a solution B containing, on a metal basis, 0.50 mol / L or more and 20.0 mol / L or less of the one or more particulate metal compounds, and containing, on a PO43− basis, less than 0.20 mol / L of at least one of (i) phosphoric acid and (ii) a phosphate salt, and stirring with a turbine stator-type high-speed stirrer such that a peripheral speed of a turbine reaches 10 m / s or more within 60 seconds after starting the mixing of the solution A and the solution B.

The thermoplastic resin is used as a matrix, the heat-conducting filler, the flame retardant and the flexibilizer are added to jointly prepare the heat-conducting insulating sheet, the prepared heat-conducting insulating sheet has the performance of heat conduction, insulation, flame retardance and the like, and meanwhile the thickness can reach 0.05-1 mm. Besides, the extrusion and calendering process is adopted for preparing the heat-conducting insulating sheet with the thermoplastic resin as the matrix, accurate control over the thickness can be achieved, and meanwhile no hole is generated on the basis that the thin-wall state of the heat-conducting insulating sheet is met.

A dielectric that has excellent electrical characteristics and causes no blistering of a copper foil during production of a copper-clad laminate using the dielectric, and a method for producing the same are provided. Further, a copper-clad laminate using the dielectric, and a method for producing the same are provided. The dielectric has a residual organic matter content of 500 µg / g or less. The metal-clad laminate has the dielectric and a metal foil.

There is provided a laminate having excellent partial discharge resistance even in a high-humidity environment and also having excellent insulating properties. A laminate comprising at least a conductor and an insulating coating, wherein the insulating coating is composed of a nanocomposite formed of a resin composition in which a metal oxide hydrate is dispersed in a resin, and wherein the metal oxide hydrate has a negative zeta potential when dispersed in N-methyl-2-pyrrolidone (NMP).

The invention relates to a component part comprising an electrically conductive component made from an elastomer material comprising industrial carbon black and an electrically nonconductive component made from an elastomer material comprising recovered carbon black (RCB), wherein the electrically conductive component and the electrically nonconductive component are connected directly to one another via a contact surface. The component part may be used, for example, as an electronic component, EMC shield material or invisible marking.

A microisolator has been described that exhibits an enhanced isolation breakdown voltage. The microisolator may include an electrically floating ring surrounding one of the isolator elements of the microisolator. The isolator element may be a capacitor plate or a coil. The electrically floating ring surrounding one of the isolator elements may reduce the electric field at the outer edge of the isolator element, thereby enhancing the isolation breakdown voltage.

The invention discloses a crosslinked polyethylene insulated flame-retardant marine power cable and a preparation method thereof, and relates to the technical field of power cables. The bismuth borate nano powder and the modified polyolefin are blended to serve as the cable material, the aging problem is reduced, and the cable transmission efficiency is improved. Organic-inorganic composite particles are prepared from 1-isopropyl-4-piperidone and zirconium dichloride under the catalysis of concentrated hydrochloric acid through a saturated solution evaporation method, and electromagnetic interference generated by internal signals is shielded; and then mixing with ammonium tripolyphosphate and copper powder, and spraying to the surface of the modified polyethylene insulating layer to form an organic-inorganic shielding layer, thereby enhancing the electromagnetic shielding effect while achieving the anti-aging effect. And the modified polyolefin is prepared by copolymerizing sodium methallyl sulfonate, diethylene glycol dimethacrylate and trivinyl phosphine, and has a stable three-dimensional structure, so that substances with an aging effect are difficult to enter the material, and the anti-aging and flame-retardant properties are enhanced.

An object is to provide a production method for a treatment solution for forming an insulating coating, in which a technique for enhancing applied tension and resistance to moisture absorption is applicable in a stable manner to the treatment solution that contains phosphate ions and a metal compound and that is for forming a phosphate salt insulating coating, and to provide a production method for an electrical steel sheet having insulating coating using the treatment solution. The production method for a treatment solution is characterized by including: mixing a solution A containing, on a PO43- basis, 0.20 mol / L or more and 10 mol / L or less of phosphoric acid and / or a phosphate salt and containing, on a metal basis, less than 0.50 mol / L of a particulate metal compound and a solution B containing, on a metal basis, 0.50 mol / L or more and 20.0 mol / L or less of the particulate metal compound and containing, on a PO43- basis, less than 0.20 mol / L of phosphoric acid and / or the phosphate salt; and stirring with a turbine stator-type high-speed stirrer such that a peripheral speed of a turbine reaches 10 m / s or more within 60 seconds after starting the mixing of the solution A and the solution B.

To provide a dielectric that exhibits superior electrical properties and does not cause the blistering of copper foil during the production of a copper-clad laminate using the dielectric, and a production method therefor, and also provide a copper-clad laminate using the dielectric and a production method therefor.SOLUTION: A dielectric has a residual organic matter content of 500 μg / g or less. A metal-clad laminate includes the dielectric and a metal foil.SELECTED DRAWING: None

The present invention provides a stator insulating material suitably applicable to a stator having a high-density coil, as well as a stator having a coil insulated by the stator insulating material and a method for manufacturing the same. [Solution] The stator insulating material contains epoxy resin, a curing agent, and spherical inorganic fillers, and is used for insulating between the coils of the stator.

The invention relates to conductive textile yarns, threads, or strands for textile-technological structure production, in particular for electronic textiles with active and / or passive electronic components, wherein the yarn, thread, or strand has an electrically insulating sheath or coating around its core. According to the invention, the sheath or coating has thermally meltable properties and, while maintaining its high resistance, is provided with a homogeneous doping of conductive microparticles, wherein a local, time-controlled application of temperature and pressure to the sheath or coating allows for the creation of a localized, electrically conductive access point to the core.

The invention provides a resin composition and a manufacturing method thereof. The resin composition comprises a resin carrier, conductive carbon black and graphene. The conductive carbon black and the graphene are dispersed in the resin carrier. Based on the total weight of the resin composition, the resin carrier accounts for 93 wt%-97 wt%, the conductive carbon black accounts for 1 wt%-3 wt%, and the graphene accounts for 2 wt%-4 wt%. According to the resin composition and the manufacturing method thereof provided by the invention, the conductive carbon black and the graphene in the resin composition can reduce the surface resistance of the resin composition, so that the accumulation of electrostatic charges is reduced.

The invention provides an electric machine and a method for electrically insulating parts of the electric machine. An electrical winding assembly includes a conductor core having a first end and an opposite second end; an insulating layer covering the conductor core; and a conductive shielding layer covering the insulating layer. The conductive shielding layer includes an insulating carrier circumferentially surrounding the insulating layer, the insulating carrier formed of a material having a heat resistance rating higher than 180 DEG C, and a conductive layer disposed on the insulating carrier, the conductive shielding layer having a surface resistivity of between 1.5 and 10 ohms / square.

The invention relates to an insulation element (1) with low electrical conductivity for the electrical insulation of an electrotechnical component in the high voltage range. The insulation element (1) comprises artificial fibres (2) and electrically conductive particles (3) having an electrically non-conductive core (5) and an electrically conductive or semi-conductive cladding (6) surrounding the core (5). Moreover, the insulation element (1) comprises a cationic polymer (4).

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).

The present disclosure provides a dielectric which has excellent electrical characteristics and does not cause copper foil expansion when a copper-clad laminate is manufactured using the dielectric, and a method for manufacturing the dielectric. Also provided are: a copper-clad laminate using the dielectric; and a method for producing the copper-clad laminate. The dielectric is characterized in that the amount of residual organic matter is 500 [mu] g / g or less. A metal-clad laminate has the dielectric and a metal foil.

To provide a submarine power cable that reduces complexity and reduce cost, compared with a case where a lead-based metal sheath is used.SOLUTION: A submarine power cable (1, 101, 201) comprises: a conductor (2); an insulation system (5) including at least a first semiconducting layer (3) provided around the conductor (2), and an insulation layer (4) provided around the first semiconducting layer (3); and a water barrier layer (7, 107, 207) surrounding the insulation system (5). The water barrier layer (7, 107, 207) is obtained from a composition comprising: a base polymer in an amount of at least 50 wt%; and an additive being graphene, graphene or graphite nanoplatelets, graphene oxide, reduced graphene oxide and / or graphite in an amount of between 0.05 wt% and 10 wt%, preferably between 0.25 wt% and 6 wt %, more preferably between 0.5 wt% and 2 wt%, based on a weight of the composition.SELECTED DRAWING: Figure 1

Micro-isolators exhibiting enhanced isolation breakdown voltage are described. The micro-isolators may include an electrically floating ring surrounding one of the isolator elements of the micro-isolator. The isolator elements may be capacitor plates or coils. The electrically floating ring surrounding one of the isolator elements may reduce the electric field at the outer edge of the isolator element, thereby enhancing the isolation breakdown voltage.

A submarine power cable (1, 101, 201) comprising: a conductor (2); an insulation system (5) including at least a first semiconducting layer (3) provided around the conductor (2), and an insulation layer (4) provided around the first semiconducting layer (3); a water barrier layer (7, 107, 207) surrounding the insulation system (5). The water barrier layer (7, 107, 207) is obtained from a composition comprising a base polymer in an amount of at least 50 wt% and an additive being graphene, graphene or graphite nanoplatelets, graphene oxide, reduced graphene oxide and / or graphite in an amount of between 0.05 wt% and 10 wt%, preferably between 0.25 wt% and 6 wt %, more preferably between 0.5 wt% and 2 wt%, based on the weight of the composition.

An insulating composition according to an embodiment of the present invention comprises a solid portion at a content of 35 wt % or less with respect to the total weight thereof, wherein the solid portion comprises inorganic particles, a polymer material, and clay, the clay has positive and negative charges distributed in the particles and is included in an amount of 0.01 parts by weight to 10 parts by weight with respect to 100 parts by weight of the solid portion, and the polymer material comprises a functional group-containing polymer. The insulating composition exhibits low viscosity at high shear rates and high viscosity at low shear rates, thereby providing excellent coating processability. During formation of an insulating layer, sliding portions are minimized so that the insulation width can be formed narrowly, thereby preventing a problem in which the positive / negative electrode capacity ratio may be reversed due to sliding portions.

A gas-insulated switching device comprises a conductor held by an insulating spacer within a sealed container filled with insulating gas. An insulating layer is applied to the surface of the curved conductor within the device. This insulating layer is formed by laminating an insulating material to the conductor's surface using either a thermal spraying or an aerosol deposition process. Ceramic particles are typically used as the insulating material. The insulating layer is then impregnated with an insulating resin.

[Problem] To provide a transmission line having excellent transmission characteristics. [Solution] Provided is a transmission line comprising a conductor and a dielectric layer, wherein the transmission line is characterized in that the dielectric layer has a plurality of air bubbles and a plurality of needle-shaped nucleating agents and, when nucleating agents longer than the median length are classified as a long nucleating agent group and nucleating agents shorter than the median length are classified as a short nucleating agent group based on the observed length of the plurality of needle-shaped nucleating agents observed in a cross-section of the dielectric layer, the average length of nucleating agents of the long nucleating agent group is 3.5 times or less the average length of nucleating agents of the short nucleating agent group.

A cable includes an inner conductor and a dielectric layer extending around the inner conductor. The dielectric layer includes a linearly-stretched polypropylene film having a porous structure that includes a plurality of pores that extend through a thickness of the linearly-stretched polypropylene film. The dielectric layer includes air molecules trapped within the pores of the linearly-stretched polypropylene film such that the dielectric layer includes polypropylene and air. The cable includes an outer conductor extending around the dielectric layer.