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6313 results about "Hot press" patented technology

Direct assembly process for fabrication of ionomeric polymer devices

InactiveUS20060266642A1Superior transduction performanceLarge strain generationEngine manufactureMachines/enginesPolymer scienceActuator
Ionomeric polymer sensors, actuators, and transducers and methods for fabricating them are disclosed. One embodiment of the sensors, actuators, and transducers possess a high surface area electrode layer that is applied by hot pressing and a highly conductive surface layer. Another embodiment of these sensors, actuators, and transducers possess a high surface area electrode layer that is penetrated by electronically conductive nanowires. Methods for fabricating these sensors, actuators, and transducers are disclosed. These methods involve the formation of the high surface area layer from a liquid mixture that contains ionomeric polymer, electronically conductive particles, and possibly diluent. This mixture is formed into layers either directly on an ionomeric polymer, on a separate transfer decal, or on an electronically conductive layer. This electronically conductive layer may also include an array of nanowires. These electrode layers are then attached to an ionomeric polymer membrane by hot pressing. The ionomeric polymer membrane may be swollen with a diluent either prior to the hot pressing or after the hot pressing step. Also, the ionomeric polymer membrane may be formed by casting from a liquid mixture containing ionomeric polymer and diluent.
Owner:VIRGINIA TECH INTPROP INC

Electrostatic spinning nanofiber membrane as well as preparation method thereof

The invention provides an electrostatic spinning nanofiber membrane as well as a preparation method thereof. The electrostatic spinning nanofiber membrane provided by the invention comprises a fiber membrane obtained by electrostatically spinning a high-melting-point polymer and a fiber membrane obtained by electrostatically spinning a low-melting-point polymer, wherein the difference on the melting points of the high-melting-point polymer and the low-melting-point polymer is not less than 10 DEG C. The electrostatic spinning nanofiber membrane provided by the invention is multipurpose and can be applied to the fields such as biomedicines, energy and chemical industry, gas and liquid filtration, waterproofness and windproofness, windproofness and heat insulation, moisture permeability and ventilation, environmental management and semiconductor sensors. According to the electrostatic spinning nanofiber membrane provided by the invention, electrostatic spinning is respectively carried out on the high-melting-point polymer and the low-melting-point polymer, and the high-melting-point polymer fiber membrane and the low-melting-point polymer fiber membrane obtained are composited and hot-pressed to obtain the electrostatic spinning nanofiber membrane. The preparation method provided by the invention is high in production efficiency and low in energy consumption, and is suitable for industrial production.
Owner:ZHEJIANG WEIXING IND DEV

Refractory high-entropy alloy/titanium carbide composite and preparation method thereof

The invention discloses a refractory high-entropy alloy/titanium carbide composite. A refractory high-entropy alloy serves as a matrix phase, and titanium carbide serves as a wild phase; and elements in the refractory high-entropy alloy are selected from at least four kinds of elements of W, Mo, Ta, Nb, V, Ti, Zr, Hf and Cr. A preparation method of the refractory high-entropy alloy/titanium carbide composite comprises the steps that at least four kinds of carbonization metal powder in tungsten carbide, molybdenum carbide, tantalum carbide, niobium carbide, vanadium carbide, the titanium carbide, hafnium carbide, zirconium carbide and chromium carbide are selected and mixed according to the equal molar ratio or the ratio close to the equal molar ratio to form high-entropy matrix powder; and after the high-entropy matrix powder and titanium powder are mixed, alloy mechanization is carried out, then spark plasma sintering or hot-press sintering is carried out, and the refractory high-entropy alloy/titanium carbide composite is obtained. The density and cost of the composite are reduced while the hardness of the composite is improved, excellent high-temperature performance is achieved, and the requirement for manufacturing a high-temperature structural component is met.
Owner:江西咏泰粉末冶金有限公司

Preparation method for silicon carbide ceramic tube or rod

The invention relates to a preparation method for a silicon carbide ceramic tube or rod. An extrusion moulding method is adopted to form a blank body; a normal pressure sintering method is adopted for sintering; and submicron level silicon carbide powder and additives are taken as main raw materials. The preparation method comprises the following steps: 1) carrying out ball milling on the main raw materials by a dry method, adding water, a dispersant, a plasticizer, a lubricant and a liquid state binder, and then carrying out ball milling by a wet method; 2) adopting a spray granulation process to granulate silicon carbide slurry; 3) extruding the blank body by a one-shot direct extrusion moulding method after vacuum pug, corrosion, and vacuum pug; 4) drying the molded blank body by a stage drying mechanism; and 5) placing the blank body of the silicon carbide ceramic tube or rod in a vacuum furnace and carrying out sintering for two times by taking argon gas as protective gas. The high temperature resisting strength and the corrosion resistance of the silicon carbide ceramic tube or rod prepared by the method are both better than those of a reactive sintered product. Compared with a hot press sintering method, the method has lower limit on the product shape and size, and lower cost. The method is suitable for the industrialized production.
Owner:宁波欧翔精细陶瓷技术有限公司

Solar battery back panel film and preparation method thereof

The invention relates to a solar battery back panel film and a production method thereof. The solar battery back panel film comprises a PET (Polyethylene Terephthalate) thin film substrate layer and at least one polyvinylidene fluoride film layer, wherein the polyvinylidene fluoride film layer and the PET thin film substrate layer are compounded through an adhesive layer. The solar battery back panel film also comprises an EVA (Ethylene Vinyl Acetate Copolymer) film layer, and the EVA film layer and the PET thin film substrate layer are compounded by adopting a composite laminating process. The preparation method of the solar battery back panel film comprises the following steps of: carrying out surface corona treatment on the PET thin film substrate layer and the polyvinylidene fluoride film layer; coating an adhesive layer on the PET thin film substrate layer; and carrying out hot-pressing compounding on the adhesive-coated surface of the PET thin film substrate layer and the polyvinylidene fluoride film layer and then solidifying. The preparation method of the solar battery back panel film is simple, and the product has excellent weather fastness, higher lamination peel strength, good barrier property and good electric breakdown resistance.
Owner:NANJING NAQUAN HI TECH MATERIAL

Method for enhancing electrostatic spinning nanofiber membrane

The invention discloses a method for enhancing an electrostatic spinning nanofiber membrane. The blending electrostatic spinning-hot rolling bonding net fixing technology which can effectively improve the strength of the electrostatic spinning nanofiber membrane is provided. The method for enhancing the electrostatic spinning nanofiber membrane is characterized in that interphase blending electrostatic spinning is conducted through multiple types of thermoplastic high polymers with the fusion point at least 20 DEG C lower than that of other components or low-fusion-point thermoplastic high polymers and non-thermoplastic high polymers, electrostatic spinning jet flows of the components are distributed frontwards and backwards in the moving direction of a receiving device, and fibers are distributed randomly in a staggered mode; after hot rolling is conducted on a blending electrostatic spinning fiber membrane, the blending electrostatic spinning fiber membrane is treated, the hot pressing temperature is slightly higher than the fusion starting temperature of the low-fusion-point thermoplastic high polymers, time ranges from 1min to 10min, the pressure ranges from 1MPa to 20MPa, after hot pressing is conducted, part of the low-fusion-point thermoplastic high polymers is fused, point adhesion is generated on the nanofiber intersection portions, and a hole is not blocked. The method for enhancing the electrostatic spinning nanofiber membrane has the advantages that the strength of the prepared enhanced electrostatic spinning nanofiber membrane is far higher than that of a common electrostatic spinning membrane and original good performance of the electrostatic spinning nanofiber membrane can be kept.
Owner:TIANJIN POLYTECHNIC UNIV

Waterproof and moisture permeable membrane, preparation method of waterproof and moisture permeable membrane, waterproof and moisture permeable fabric and preparation method of waterproof and moisture permeable fabric

The invention provides a waterproof and moisture permeable membrane which sequentially comprises a nano-fiber hydrophilic layer and a nano-fiber hydrophobic layer. The nano-fiber hydrophilic layer is prepared from a hydrophilic polymer by electrostatic spinning; the nano-fiber hydrophobic layer is prepared from a hydrophobic polymer by electrostatic spinning. The waterproof and moisture permeable membrane provided by the invention has good moisture permeability and air permeability; an experiment result shows that the moisture permeability of the waterproof and moisture permeable membrane provided by the invention can reach 10,000g/m<2>24h, and the air permeability of the waterproof and moisture permeable membrane can reach 0.29mL/cm<2>s. The invention also provides a preparation method of the waterproof and moisture permeable membrane. According to the preparation method provided by the invention, the nano-fiber hydrophilic layer and the nano-fiber hydrophobic layer which are prepared by electrostatic spinning are subjected to hot-pressing compounding, so that the obtained waterproof and moisture permeable membrane has better performance and can be integrally formed without being adhered by an adhesive; the production process is simplified; the waterproof and moisture permeable membrane is easy for industrial production. The invention also provides a waterproof and moisture permeable fabric and a preparation method thereof.
Owner:ZHEJIANG WEIXING IND DEV

Co-extruded composite stone-plastic polyvinyl chloride (PVC) floor

The invention relates to a stone-plastic polyvinyl chloride (PVC) floor. A co-extruded composite stone-plastic PVC floor sequentially comprises an abrasion-resistant layer, a printed layer and a stone-plastic PVC co-extruded layer from top the bottom. The printed layer is hot-pressed on the stone-plastic PVC co-extruded layer. The abrasion-resistant layer is hot-pressed on the printed layer. The stone-plastic PVC co-extruded layer can be formed by co-extruding a stone-plastic layer and a PVC foam sound-absorption layer and can also be formed by co-extruding a PVC bottom material layer, a stone-plastic micro foam layer and a second PVC foam sound-absorption layer. According to the co-extruded composite stone-plastic PVC floor, the stone-plastic PVC co-extruded layer is produced through the co-extrusion technique, then the printed layer and the abrasion-resistant layer are attached through the hot pressing technique, and then the co-extruded composite stone-plastic PVC floor is formed; glue is not needed in the whole production process, so that the production cost is greatly reduced, the harm to the body health of workers is reduced, and the quantity of released volatile organic compounds (VOC) in the product using process is greatly reduced; and meanwhile, a good silencing effect is achieved.
Owner:HUIZHOU WEIKANG NEW BUILDING MATERIALS CO LTD

Powder metallurgy titanium alloy and preparation method thereof

The invention provides powder metallurgy titanium alloy and a preparation method thereof. The powder metallurgy titanium alloy comprises the following components in percentage by mass: 2 to 7 percent of Al, 2 to 8 percent of Mo, 2 to 6 percent of V, 2 to 10 percent of Ag, 0.1 to 3.0 percent of LaB6 and the balance of titanium and inevitable impurities. The method comprises the following steps of: weighing titanium powder, aluminum powder, molybdenum powder, aluminum-vanadium intermediate alloy powder, silver powder and lanthanum hexaboride powder with certain particle size according to the mass percentage of the components; uniformly mixing the powder by a mixing method; preparing a green compact with a certain shape by a compression molding process; placing the green compact in a vacuum hot pressing sintering furnace to sinter; and cooling the green compact along with the furnace to obtain silver and titanium boride particle-containing powder metallurgy titanium alloy. The technological process is simple; the silver powder is added during the mixing of the materials to improve the molding property of the green compact; the lanthanum hexaboride powder is added to perform reaction in situ so as to generate titanium boride dispersion enhanced matrix alloy; the compactness of the sinter compact is further improved by hot pressing sintering; and thus the novel powder metallurgy titanium alloy with high compactness and high strength is obtained.
Owner:CENT SOUTH UNIV

Grain boundary diffusion method for improving properties of sintered NdFeB magnets

The invention relates to a grain boundary diffusion method for improving properties of sintered NdFeB magnets. The grain boundary diffusion method comprises the following steps of stacking sintered NdFeB magnets and diffusion alloy sheets together and placing in a hot-pressing furnace; vacuumizing the hot-pressing furnace until the vacuum degree reaches a set value, heating the hot-pressing furnace, and when the temperature of the hot-pressing furnace reaches a set value, beginning to exert a pressure and maintaining the pressure and putting the diffused sample into a high-vacuum furnace for annealing, wherein the diffusion alloy sheets are low-melting-point eutectic diffusion alloys and are represented by R-TM, R is one or more of Sc, Y, La, Ce, Pr or Nd and TM is one or more of Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn. Compared with the prior art, the sintered NdFeB magnets modified by the pressure diffusion method, which is provided by the invention, have the advantages of large diffusion depth of a diffusion agent, uniform distribution of grain boundary phases, high coercivity and the like, especially, low-melting-point diffusion alloys designed by the invention are free of expensive heavy rare earth element dysprosium and thus the cost of the raw materials is relatively low, the diffusion temperature is low and the energy consumption in the diffusion process is small.
Owner:SHANGHAI JIAO TONG UNIV

Overlapped coating composite lithium battery diaphragm and preparation method thereof

The invention discloses an overlapped coating composite lithium battery diaphragm and a preparation method of the overlapped coating composite lithium battery diaphragm. According to the overlapped coating composite lithium battery diaphragm, the upper surface and the lower surface of a graft PE microporous membrane layer are provided with a graft PTFE microporous membrane layer and a ceramic coating in a compounded mode respectively and sequentially, the thickness of the ceramic coating is 0.001-7 micrometers, the thickness of the graft PTFE microporous membrane layer is 1-10 micrometers, and the thickness of the graft PE microporous membrane layer is 5-25 micrometers. The preparation method of the overlapped coating composite lithium battery diaphragm comprises the following steps that the graft PTFE microporous membrane layers are overlapped on the upper surface and the lower surface of the graft PE microporous membrane layer respectively, then the graft PTFE microporous membrane layers and the graft PE microporous membrane layer are compounded together in a hot pressing mode to obtain an initial diaphragm, the hot pressing temperature is 100-350 DEG C, the pressure is 0.3-6 kg, and the linear velocity is 0.5-50 m/min; after the initial diaphragm is dipped into ceramic suspension liquid, the overlapped coating composite lithium battery diaphragm is obtained through drying and solidification; the obtained diaphragm is high in puncture-resistant strength, high in porosity and good in high-temperature turn-off performance.
Owner:SINOMA LITHIUM BATTERY SEPARATOR CO LTD

Die forging method of high-temperature alloy

The invention discloses a die forging method of a high-temperature alloy; the method comprises the following steps: a) die forging stock is in thermal insulation and heat preservation, and clad with thermal insulation cotton; b) heating of the die forging stock: the die forging stock clad with the thermal insulation cotton is heated in a heating furnace and preserved at a temperature, the heating temperature is 900-1200 DEG C, and the heat preservation time is not less than 30 minutes; c) heating of a die: the die is put into a press, and heated to the working temperature of 600-650 DEG C in the heating furnace of the press; d) die forging: the die forging stock is taken out of the heating furnace and sent to an oil press or a hydraulic press for die forging, the amount of deformation is 40-80%, and the die forging speed is 1-5mm/s. The die forging method of the invention solves the problem of slow heating-up of the die forging stock in the heating furnace resulting from the existing 'compound jacketing' mode, improves the heat preservation effect of workpiece, and lower the cost for the application of heat insulating materials; the die forging method adopts a lower die temperature, which sufficiently eliminates the problems of short service life of the hot press forging die and great production difficulty, and facilitates producing the alloy forged pieces conforming to finecrystalline requirements.
Owner:宝武特种冶金有限公司

Simulation experiment device and method for hot-press hydrocarbon generation and discharge based on basin evolution history

InactiveCN103454399AIn line with the actual geological conditionsReliable hydrocarbon expulsion parametersEarth material testingEngineeringPetroleum
The invention provides a simulation experiment device and a simulation experiment method for hot-press hydrocarbon generation and discharge based on the basin evolution history, and belongs to the technical field of petroleum and gas geochemical experiment study. The experiment device comprises a hydrocarbon generation system and a discharged hydrocarbon collecting system which are connected through a multi-channel combined valve (139). The method comprises the steps of dividing different stages of basin evolution according to the construction evolution history of an actual geologic basin, automatically regulating the communicated state of the hydrocarbon generation system and a hydrocarbon discharge device, and simulating the hydrocarbon generation and discharge processes under a basin dynamic evolution condition. According to the invention, the hydrocarbon source rock hydrocarbon generation and discharge simulation experiment approximate to the construction evolution history of the basin containing petroleum and gas is achieved by combining with the construction evolution history of the basin and considering influences of paleo-fluid pressure fields of hydrocarbon source rock and reservoir rock to the generation and discharge of petroleum and gas, which are caused by basin evolution.
Owner:CHINA PETROLEUM & CHEM CORP +1
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