70 results about "Nomex" patented technology

A non-woven, flame resistant fabric and a disposable coverall made from the fabric. The non-woven, flame resistant fabric is made of a plurality of Nomex fibers, a plurality of Kevlar fibers, and a plurality of electrostatic dissipative fibers. The coverall has an upper section for covering the shoulder, chest, back and abdominal regions of a wearer. The upper section has long sleeves to cover the arms of the wearer and a collar to cover the neck region of wearer. The coverall also has a waist section contiguous with the upper section for covering the waist region of a wearer, and a pair of leg sections for covering the legs of the wearer. Each leg section has an upper portion contiguous with the waist section. The coverall also has a seat section contiguous with the waist section and the upper portions of the leg sections. The coverall has a two-way zipper extending from the collar section to the waist section.

The invention provides a composite material silencing and noise-reducing acoustic liner and a preparation method thereof, belongs to the technical field of structural/functional integrated composite material molding, and mainly relates to a composite material microporous panel honeycomb sandwich structure silencing and noise-reducing acoustic liner assembly, a molding process method and applications thereof, specifically to layer spreading of aramid fiber and glass fiber reinforced epoxy resin-based composite prepreg, application of a polymer acoustic separation membrane material, and hot press tank curing molding. According to the present invention, a large number of micro-pores are processed on the composite material layer plate through the laser processing method; and the Nomex aramid paper honeycomb core, the composite material panel and the back plate are adhered and cured by the film-like adhesive to form the micro perforated plate composite material silencing and noise-reducingacoustic liner, wherein the silencing and noise-reducing acoustic liner can be the single-freedom-degree acoustic liner structure and the multi-freedom-degree acoustic liner structure, and can achievethe acoustic noise reduction function of aero engines.

The invention belongs to the field of a transformer device, in particular to the improvement technology of the dry type transformer. The invention discloses a manufacturing method for the dry type transformer. processing a lead wire, an insulating tube and an insulating end ring by an NOMEX paper with insulated paint or glass cloth, and then winding them into a transformer; the manufacturing method is simple for processing, is convenient for the operation of work personnel and can effectively prevent dust from being cohered on the surface of the coil; respective to the productive technology of the existing vacuum pressure dipping paint, bigger device and area investment can be saved, thus reducing the pollution on the production environment and the influence of the insulating paint dropping on the production occasions in the carrying process; in addition, a pressure vessel is not needed in the production process; the safety loophole of the devices does not exist; and multiple-heating baking is saved in the production process, thus saving a mass of energy.

A lightweight, flexible, layered insulation composed of glass or ceramic fabric covered with a ceramic coating and overlying an insulating felt made from needled polybenzazole (PBZ) material which is preferably polybenzoxazole (PBO), and which optionally contains a poly(1,3-phenylene isophtalamide) felt material, commercially known as Nomex™, either combined with the PBZ felt or layered beneath the PBZ felt as a separate layer. The insulation is readily applied to a reusable launch vehicle via a silicone adhesive.

A surface modifying process for the polyarylamide fibre is disclosed, which is aimed at decreasing its hydroscopicity by 50-80%, increasing its strength after it absorbs water by 20-30% and improving the binding strength between fibre and resin by 10-20%.

The invention discloses a polysulfonamide fiber-containing dry mica tape, which comprises a mica layer, a bonding agent layer and a reinforcing material layer in sequence from the top to the bottom, wherein the mica layer consists of mica powder, polyphenyl sulfone p-phenylene formamide fiber and a bonding agent; the content of the polyphenyl sulfone p-phenylene formamide fiber accounts for 2-50 percent by weight of total mass of the mica layer; and the content of the bonding agent accounts for 2-25 percent by weight of the total mass of the mica tape. The invention has the remarkable technical advantages that: 1, the dry mica tape has high permeability; in the presence of the polysulfonamide fiber, a relatively loose structure and gaps with certain continuity can be formed in an insulating layer, so that the permeability of the dry mica tape can be improved, and impregnation of impregnated resin is better facilitated; 2, heat-resisting organic fiber in a certain proportion is added into the mica layer, namely, the mechanical strength of the mica layer is improved; and 3, heat-resisting organic fiber used in the mica tape is superior to Nomex fiber on the aspects of heat resistance, impregnating performance, radiance resistance, high-temperature size stability, flame retardance and chemical stability, has excellent electrical insulating performance simultaneously, and is more suitable for manufacturing a mica type with a motor in an insulating way than Nomex fiber.

The invention discloses a high-temperature-resistant insulating paper adhesive tape including a substrate and an adhesive layer. The substrate is NOMEX insulating paper or TFT composite insulating paper; the adhesive layer is a coating layer of a mixed adhesion liquid of an organosilicone adhesion agent and an epoxy resin adhesion agent, and the mixing ratio of the organosilicone adhesion agent to the epoxy resin adhesion agent is 1:3-5. Through selection of the substrate and the adhesion agents, the adhesive tape is endowed with excellent insulating property, high temperature resistant property and bonding property, can meet the using requirements of an oil type transformer, adapts to new insulation technology, and has a broad application prospect.

In a frame for an over the highway or off-highway truck or tractor, the frame includes a first and second frame rail and a composite cross-member comprising a first sheet, a second sheet and a core material sheet positioned between the first and second face sheet. The first and second face sheets being made of metal and plastic and the core material being made of any one of wood, plastic, honey-comb, foam and nomex. The first sheet, second sheet and core material sheet are all bonded together to form a cross-member. The cross-member is then mounted to frame rails to construct a truck or tractor frame.

The invention discloses a method for synthesizing nomex resin containing fluorine and synthesized resin thereby and an application thereof, and belongs to the technical field of macromolecule polymerization. The nomex resin containing fluorine of the invention is prepared by hypothermia pre-polycondensation of paraphthaloyl chloride and fluoric diamine in strong polar solvent and/or inorganic salt solution thereof at the temperature of -15-20 DEG C and then heating to 40-95 DEG C for polymerization. The intrinsic viscosity of the nomex resin containing fluorine prepared by the invention is 5-10; the resin has high fire resistance, the limited oxygen index can be 45-50; and the resin also has the characteristics of small hygroscopicity (0.6-1.5%), low surface energy, high dielectric strength and the like. The nomex resin containing fluorine of the invention can obtain nomex fiber containing fluorine by spinning, and can be processed into film, coating or coordination compound of the nomex resin containing fluorine for using.

The invention discloses a line outgoing casing pipe applied to high-pressure superconductivity electrical equipment. The line outgoing casing pipe is composed of a fiber reinforce plastic protective cover (1), low-temperature glue soaking paper (2), a lead (3) and an umbrella skirt (4). A clamping mechanism composed of a clamp nut (5) and a sealing gasket (6) is arranged on a low-temperature container cover board. The upper ends of the fiber reinforce plastic protective cover (1), the low-temperature glue soaking paper (2) and the lead (3) are located in the room-temperature environment, and the lower ends of the fiber reinforce plastic protective cover (1), the low-temperature glue soaking paper (2) and the lead (3) are inserted into a low-temperature container. The umbrella skirt (4) is arranged on the upper portion of the fiber reinforce plastic protective cover (1) so as to reduce creepage along the surface of the low-temperature container upper cover board by the lead (1). The fiber reinforce plastic protective cover (1) and the umbrella skirt (4) are formed by machining fiber reinforce plastic bars, the glue soaking paper (2) is made of Nomex paper or PPLP or polyimide glass wool cloth composite paper with low-temperature glue or paint by utilizing the vacuum pressure encapsulation technology or the vacuum pressure impregnation technology, wherein the Nomex paper or the PPLP or the polyimide glass wool cloth composite paper is resistant to low temperature, high in pressure-resistant strength and easy to impregnate.

The invention relates to one motor, transducer, electrical reactor section hinge coil set, which is characterized by the following: the rectangle section hinged wire core is in array type or beehive distribution; the process method comprises the following steps: distributing the shape device onto hinge points through relative position due to pressure wheel wire to make it in regular distribution; the regular wire section outline is of rectangle shape; the coil set is of medlin and NOMEX insulation layer to product alternating 1000kv and direct current 800kv reactor.

The invention relates to a turbocharged corrugated pipe. The turbocharged corrugated pipe comprises a pipe body, wherein the pipe body is formed by gluing an inner pipe rubber layer made of a fluorinated silicone rubber material, a fiber line enhancement layer made of aramid line nomex and an outer pipe rubber layer made of a fluorinated silicone rubber material from the inside out sequentially; both ends of the pipe body are matched with metal ring clasps in a buckling manner; and a fixed steel wire is wound on the outer pipe rubber layer. The turbocharged corrugated pipe has the advantages of high high-temperature resistance, gasoline resistance, diesel resistance, heat resistance and aging resistance, high impermeability, high bearing capability, good dynamic pulse performance in high temperature and low temperature states, capability of bearing certain negative pressure due to large calibers, high buckling sealing performance at both ends, uniform wall thickness at both ends, low manufacturing operation cost and stable quality.

A composite structure comprising a fabric layer encapsulated in a silicone polymer or silicone rubber matrix. The fabric layer preferably comprises a woven fabric that includes apertures through which silicone polymer may penetrate during fabrication to provide complete or virtually complete encapsulation thereof in the silicone matrix Because of the method of fabrication, the fabric layer resides closer to one surface of the composite structure so that its esthetic design can be seen from at least one surface of the composite structure. Relatively heat resistant fabrics such as cotton and Nomex® are specifically preferred as the fabric portion, however, Teflon® coated fibers of other woven materials may also provide preferred structures. The incorporation of a thermally insulating ceramic into the silicone matrix further enhances the thermal insulating properties of the composite.

The invention discloses a high-temperature-resistant aramid filter cloth capable of facilitating dust removing and a preparation method thereof. The filter cloth comprises a middle base cloth layer, a superfine fiber dust-facing surface layer formed by NOMEX fibers and meta-aramid fibers in a net laying mode, a breathable air-purifying surface layer formed by meta-aramid fibers in a net laying mode, and a PTFE emulsion dipping layer containing high-fineness talcum powder. NOMEX fibers and meta-aramid fibers are used for forming a base material in a laying mode, and then the base material and corrosion-resistant and oxidation-resistant PTFE base cloth are combined and felted to prepare the filter cloth, so that the strength and filter precision of the filter cloth are improved; meanwhile, PTFE emulsion containing high-fineness talcum powder is used for performing dipping treatment in the preparation process, so that the surface of the filter cloth has certain hydrophobicity, and the acid and alkaline corrosion resistance of the filter cloth is improved; moreover, the surface smoothness of the filter cloth is improved, the dust removing rate is increased, the dust holding capacity is small, and dust removing is easier.

A protective cover assembly is provided for a communications device of the type comprising a radio unit interconnected with an accessory either through a power cord or wireless technology. The cover assembly includes first and second portions constructed of a fire retardant material, such as NOMEX®. The first portion is configured to contain the accessory and the second portion is configured to contain the power cord. The first and second portions are releasably secured to one another by mechanical fasteners, such as snaps. The first portion includes a panel that can be opened to allow the cover to be slid over the radio accessory and closed to secure the cover over the accessory. Typically, the accessory is a speaker/microphone, in which case the cover first portion includes a perforated section that allows sound to pass through the cover.

The invention relates to the technical field of power transformer equipment, and in particular relates to a non-encapsulated dry type power transformer which comprises a winding component, an upper fixed part and a lower fixed part, wherein the upper fixed part is arranged on the top of the winding component; the lower fixed part is arranged at the bottom of the winding component; the winding component comprises an iron core, as well as a low-voltage winding and a high-voltage winding which are wound on the iron core; Nomex insulation paper is arranged between the low-voltage winding and the high-voltage winding; both the low-voltage winding and the high-voltage winding are subjected to vacuum pressure impregnation through H-grade solvent-free insulation paint. By adopting the structure, the non-encapsulated dry type power transformer disclosed by the invention has good insulation performance; extremely good electrical performance and mechanical performance of the transformer are kept during the whole service life period; the empty loss and negative loss of the non-encapsulated dry type power transformer are 20% and 25% less than traditional specified requirements; the non-encapsulated dry type power transformer is low in loss and noise and good in environmentally-friendly effect; furthermore, the non-encapsulated dry type power transformer disclosed by the invention is widely used in places having intensive people and high fireproof requirements, such as metros, high-rise buildings, mines and airports, and moist, high-temperature and load fluctuation severe environments.

The invention discloses a composite insulating material and a processing method thereof. The composite insulating material has a double-layer structure formed by a surface layer of epoxy glass-cloth and an inner layer of NOMEX insulated paper which are stuck together. The processing method comprises the following steps that: the moisture-eliminated NOMEX insulated paper with the necessary size and an epoxy prepreg are lapped between a steel plate with release paper, the steel plate is heated and pressurized to ensure that the epoxy prepreg is solidified into the epoxy glass-cloth with the functions of moisture protection and protection, the NOMEX insulated paper and the epoxy glass-cloth are stuck to form the needful composite insulating material. The composite insulating material has the advantages of both the NOMEX insulated paper and the epoxy glass-cloth, that is not only has good insulating performance of the NOMEX insulated paper but also has washable property of the glass-cloth and has the characteristics of good moisture protection and certain bending performance, thereby further improving the insulating and pressure-proof performance of the product.

The invention discloses a primer for bonding of addition type silicone rubber and a dry type transformer material. The primer is prepared from 8-20 parts of silicon resin, 3-7 parts of vinyl silane coupling agent, 3-8 parts of acryloyloxy silane coupling agent, 4-8 parts of epoxy silane coupling agent, 25-35 parts of silicate ester compound, 0-0.5 part of glacial acetic acid and 100 parts of organic solvent. By means of the primer, silicon steel sheets, DMD insulation paper, NOMEX insulation paper, copper foil, silk-covered wires and glass fiber gridding cloth materials in the dry type transformer and the addition type silicone rubber are firmly bound, and the preparation process is simple.

The invention provides a high-overload high-temperature-resistant oil-immersed transformer which comprises an underframe and an oil tank. A tank cover is arranged at an upper end opening of the oil tank, a rubber strip is arranged between the upper end opening of the oil tank and the tank cover, a transformer core is arranged in the oil tank, and the oil tank is filled with 110-kv high-temperature-resistant insulation oil. Lifting plates, low-voltage sleeves, high-voltage sleeves, a tap switch, an oil level indicator and a thermometer seat are arranged on the upward face of the tank cover, the lifting plates are symmetrically distributed at the four corners of the tank cover, the low-voltage sleeves are evenly distributed on one side of the tank cover, and the high-voltage sleeves are evenly distributed on the other side of the tank cover. The transformer core comprises an iron core, a low-voltage coil is wound around the outside of the iron core, a high-voltage coil is wound around the outside of the low-voltage coil, the high-voltage coil passes through the tap switch to be connected with the high-voltage sleeves, and the low-voltage coil is connected with the low-voltage sleeves. Turn insulation of the high-voltage coil and the low-voltage coil is NOMEX insulation paper; the front side wall and the rear side wall of the lower end of the oil tank are concave inwards to form bottom grooves. The high-overload high-temperature-resistant oil-immersed transformer is small in size, compact in structure, long in service life and resistant to high temperature.

The invention discloses a mica paper, which consists of fibers and mica powder, the fibers are uniformly distributed in the mica layer, moreover, the quantity of the fibers is 2 to 50 percent of the total weight of the mica paper, wherein the fibers are poly-diphenylsulfone-diphenyldiformamide fibers. The invention has the following advantages: (1), the mechanical strength of the mica paper is enhanced; (2) a relatively loose structure and voids with certain continuity are formed in the mica layer, and thereby the air permeability of a mica tape can be increased, which is more favorable for the impregnation of resin into the mica tape; (3) compared with the mechanical strength of the low-resin mica tape produced by the current domestic technique, the mechanical strength of the mica tape is enhanced, consequently, the mica tape can endure higher pulling force in the process of winding an insulation, and thereby the insulation can be more tightly wound; (4) the used heat-resistant organic fibers are better than Nomex fibers in terms of heat resistance, impregnability, radiation resistance, high-temperature dimensional stability, fire resistance and chemical stability, and also have excellent electrical insulation property.

The invention relates to an aramid skin-paper honeycomb sandwich cylinder shell structure, a preparation method thereof and application thereof and particularly relates to a Kevlar49 aramid fiber woven fabric reinforced epoxy resin based composite material skin-Nomex perforated paper honeycomb sandwich cylinder shell structure applied to a spacecraft antenna sub-system support structure and a preparation method thereof, belonging to field of spacecraft composite material structures and the forming technology.