850results about How to "Isolated contact" patented technology

A device (10) for treatment of obesity of a patient comprises an annular element (12) having a relatively large outer boundary and a relatively small inner boundary, and an elongated flexible tube (14) extending from the relatively small inner boundary of the annular element to a distal end. The relatively large outer boundary is adapted to be attached to an inner wall of a stomach (100) of a patient, such that the annular element divides the stomach (100) into two chambers, an esophagus-end chamber close to an esophagus of the patient, and a pylorus-end chamber close to a pylorus of the patient. The invention also provides a method for treatment of obesity of a patient which includes inserting an annular element having a relatively large outer boundary and a relatively small inner boundary into a stomach of the patient, and attaching the relatively large outer boundary of the annular element to an inner circumference of the stomach of the patient.

The invention relates to a fruit tree protective agent, particularly a kind of fruit protective glue for preventing fruit tree scar and rotting wound produced by pruning. The invention solves the problems existing in present technology, for instance the traditional technology of treating fruit tree wound and cut is simple, the effect is bad, and so on. The product is composed of the following materials: 60-70 parts by weight of polyvinyl alcohol, 10-20 parts by weight of glycerol, 0.004-0.006 parts by weight of GA, 4-5 parts by weight of asomate, 85-100 parts by weight of water, heating and dissolving and at last forming a jelly solution. The product can prevent rot disease, and occurrence of new diseases, heal the wound and scar gradually, prevent the cracks between the tree bark and the xylem, make the tissue around the scar or wound heal in Jun-Jul in present year, and the efficiency is 95%. The product is applied in apple tree, pear tree, peach tree and other economic crops. The product is easy to use all year round without preparation at the scene.

The invention discloses organic-inorganic hybrid nanometer film coating aluminum powder pigment and a preparation method and application thereof. The preparation method comprises the followings steps: by utilizing organic-inorganic hybrid technology and taking aluminum powder pigment as nuclear, firstly performing free radical polymerization on polymerisable carbon-carbon double bond reaction monomers and polymerisable carbon-carbon double bond organosiloxane; and bonding the obtained polymer and ethyl orthosilicate with the surface of the aluminum powder pigment in a hydrolysis mode, and further coating a layer of organic-inorganic hybrid nanometer film on the surface of the aluminum powder. On the basis of maintaining the lustrousness of the aluminum powder, the prepared organic-inorganic hybrid nanometer film coating aluminum powder pigment has excellent compatibility with resin and good acid and alkaline resistance properties, simultaneously well solves the problem of 'powder falling' when the conventional aluminum powder and single-layer or two-layer costing aluminum powder pigment are applied to metallic coatings, and provides a foundation for applying modified aluminum powder pigment and developing high performance metallic coatings.

The invention discloses a water-base anti-rust agent composed of 30% to 75% film-forming agent, 0.5% to 6.0% inhibitor, 2% to 16% accessory ingredient and water. Bonding force of film layer to basal body is improved by adopting acrylic ester emulsion or water-base polyurethane emulsion as film-forming substance associated with components of inhibitor, accessory ingredient, etc. The water-base anti-rust agent is brushed on steel surface to form continuous compact protection layer, isolating steel surface from oxygen and water vapor effectively, for long lasting rust prevention. The anti-rust period of steel piece might be more than one year. The protecting film is quite compact, which maintains fundamental color of steel piece invariable. User can process next step of treatment directly without removing the protecting film, which reduces tiresome process of removing anti-rust coat. Operation modes include soaking, spraying, brush coating, etc. The invention is incombustible, nontoxic and environment-friendly. Contents of free formaldehyde, heavy metal and volatile organic meet qualified criteria. Bond strength of twice-brushed deformed steel bar to concrete is more than non-brushed test piece.

The invention discloses a preparation method for an organic/inorganic hybridization cladding aluminum composite particle, which includes mixing leafing aluminum powder and solvent alcohol evenly to be transferred to a reactor to be stirred for a period of time, then adding alcoholic solution containing an organic silicon source and an inorganic silicon source at a constant speed and mixed solution of catalyst, water and alcohol, reacting for a period of time at the constant temperature, and finally filtering, washing and vacuum drying to obtain the organic/inorganic hybridization cladding aluminum composite particle. The organic/inorganic hybridization cladding aluminum composite particle has the following advantages of being capable of scattering in hydrosolvent and the alcohol solvent well and good in compatibility with resin, keeping good metal glossy, and simultaneously having good performance for resisting acid and alkaline corrosion. The organic/inorganic hybridization cladding aluminum composite particle can be used as environment-friendly metallic pigment for water-based paint.

The invention discloses a silicon-carbon composite microsphere anode material and its preparation method. the preparation method comprises the following steps: firstly, nano-silicon particles and a first macromolecular solution are mixed, and first composite microspheres are formed after spray drying; then, the first composite microspheres and a second macromolecular solution are mixed to carry out surface coating on the first composite microspheres, and second composite microspheres with a core-shell structure are formed after solvent evaporation; and finally, the second composite microspheres undergo oxidation and carbonization treatments to form the silicon-carbon composite microsphere anode material. By the preparation method which has a simple technology, is low-cost and is easy to operate, the silicon-carbon composite microsphere anode material is prepared. In addition, no etching operation for pore-forming is required by the preparation method. Raw materials used in the preparation method can be selected from a number of sources. According to the silicon-carbon composite microsphere anode material obtained, advantages of nano-silicon and a carbon substrate are combined effectively. Thus, electrochemical performance of the silicon-carbon composite microsphere anode material used as a negative electrode of a lithium ion battery is enhanced.

The invention relates to a method for preparing graphene material by microwave irradiation in a vacuum or inert gas environment. The method comprises the following steps: taking dry graphite particles to be placed in a vacuum cavity of a microwave chamber and closing a top cap of the vacuum cavity; pumping the air pressure in the vacuum cavity to be in an ultimate vacuum state; injecting gas into the vacuum cavity till driving residue oxygen in the vacuum cavity; starting the microwave irritation till the oxidation graphite explodes and breaks; closing the microwave irritation and filling the air pressure in the vacuum cavity to be in an atmosphere state; opening the top cap of the vacuum cavity and collecting the exploded and reduced oxidized graphite powder. The method has the advantages that the heating is concentrated due to microwave and the power is high; graphite is heated and oxidized in short time so that the oxidized graphite is heated and reduced instantly and rapidly expands to release a large quantity of gas; the vacuum cavity can effectively isolate the contact between oxygen and graphene so as to avoid the combustion of graphene in the high temperature reduction process, thereby increasing the reduction yield.

A flat blade windshield wiper blade (12) has a naturally elongated curve with a delicate wiper element (16) to be protected during shipping and display for retail sales purposes. A protective package (12) surrounds the wiper (12). The package (12) is made from a single piece of sheet stock and includes a flexible, outwardly bowed front panel (24), a back panel (26), and opposing left (30) and right (28) side panels adjoining respective sides of the front (24) and back (26) panels. Top (32) and bottom (34) end flaps extend between the front (24) and back (26) panels for forcing the front (24) panel to form in a generally semi-cylindrical configuration bowed outwardly relative to the back panel (26). The wiper (12) is disposed in a shipping condition in the package (12), with a connector (22) feature of the wiper (12) bearing in direct pressing contact with the bowed front panel (24). The wiper element (16) is completely isolated from contacting the package (12) by wedging other portions of the wiper (12) in three discrete regions of direct contact against the bowed front panel (24) and three discrete regions of direct contact against the back panel (26).

The invention discloses an antiseptic protective film used in a ship boiler, which comprises octadecylamine, emulsifier, stabilizer, deoxidant and water. The antiseptic protective film used in the ship boiler has good antiseptic effect, high stability, long preservation time, safety and environmental protection and can be used in both an operation condition and an idle condition when used in the ship boiler.

The invention relates to a spray freeze-drying preparation technology for a polyunsaturated fatty acid oil microcapsule, which comprises the following technological steps: mixing oil containing polyunsaturated fatty acid with emulsifier and water to obtain mixture; homogenizing the mixture to obtain emulsion; atomizing the emulsion into liquid drops which are sprayed into a spray drying device with temperature of negative 60 DEG C to negative 10 DEG C, wherein powder embedding materials are contained at the bottom part of the spray drying device, and blasting low-temperature gas to fully mix the materials in the spray drying device and to keep the temperature in the spray drying device to be the set temperature; and further drying and screening to obtain polyunsaturated fatty acid oil microcapsule products. The invention has the advantages that the drying temperature of the preparation technology is low, the speed is fast and the nutritional ingredients are not apt to be damaged; the technology is simple and convenient and the automatic mass production can be realized; and the oil embedding rate of the obtained independent polyunsaturated fatty acid oil microcapsule particles is high, the embedding performance is good, the product shelf life is long and the stability is good.

The invention provides a method for extracting lutein from marigold particles. The method comprises the following preparation steps: (1) grinding marigold dried flower particles sifting out, placing the powder in an extraction device, continuously passing the powder through organic solvent, and collecting and filtering the extracting solution; (2) placing the extracting solution in a distillationstill for distillation and carrying out basic hydrolysis on the concentrated extracting solution with the participation of a phase transfer catalyst; (3) using acid to adjust solution pH value after saponification, and adding distilled water for stirring; (4) extracting the lutein by organic solvent, carrying out reduced pressure distilling and recovery on extract liquor, thus obtaining lutein crude product; and (5) carrying out eluviation and obtaining food or medical grade lutein by vacuum drying. The invention features simple method, low cost, easy post-processing, and achieves content of final product which reaches more than 97%, therefore, the lutein extracted by the method of the invention can be applied as food additive and raw materials of medicines and health products and is applicable to industrial mass product.

The invention relates to a cleaning machine for an air cleaner element. The cleaning machine comprises a closed cover and a two-position valve, wherein a chassis and an external cleaning device are arranged on the inner side of the closed cover; a rotating platform and an internal cleaning device are mounted on the chassis; the rotating platform can realize the rotating movement; a fixing clamp used for fixing the air cleaner element is mounted on the rotating platform; an air-blowing port of the internal cleaning device is opposite to an inner wall of the air cleaner element; the air-blowing port of the external cleaning device is opposite to an outer wall of the air cleaner element; the internal cleaning device is connected with the external cleaning device through the two-position valve and a compressed air source. The air cleaner element is driven to rotate by the rotating platform, the cleaning device is arranged in and out of the air cleaner element and the high-efficient environment-friendly cleaning of the air cleaner element is realized.

The invention provides a polyimide/rod-like clay nano-composite film and a preparation method thereof, which belong to the field of polymer materials. The composite film provided by the invention takes polyimide as a matrix and takes rod-like clay as a disperse phase, wherein the mass fraction of the polyimide matrix is 70 to 99.9 percent; the mass fraction of the rod-like clay is 0.1 to 30 percent; and the rod-like clay is sepiolite, attapulgite or a mixture of the two in arbitrary mixture ratio. The preparation method obtains the polyimide/rod-like clay nano-composite film by dispersing the rod-like clay in an organic solvent, adding diamine and dianhydride to the organic solvent, mechanically stirring the organic solvent for 1 to 3 hours at a temperature of between 0 and 30 DEG C, obtaining a polyimide/rod-like clay mixed solution, smearing a glass plate with the mixed solution to form a film, volatilizing the solvent and performing hot imidization. The preparation method is simple. The obtained composite film has the advantages of excellent mechanical properties, dimension stability, good thermal stability, chemical stability and the like.

The invention discloses an MWT and passivation combined crystal silicon solar cell and a manufacturing method thereof. The crystal silicon solar cell comprises a passivating film, a phosphorus diffusion layer, a P-type silicon substrate, an aluminum oxide film, a laminated protective film and an aluminum printing layer structure which are sequentially superposed, and a through-hole silver electrode penetrates the crystal silicon solar cell. The manufacturing method of the crystal silicon solar cell comprises the steps of drilling, flocking, diffusing, polishing, film growth, tapping, hole filling, printing, sintering and the like. The MWT and passivation combined crystal silicon solar cell has the advantages of being low in cost and capable of being produced in a mass mode.

The present invention relates to a cracking furnace tube for retarding coking and carburizing of an ethylene cracking furnace tube, and a manufacturing method thereof. According to the present invention, the inner surface of the cracking furnace tube is provided with a layer of an oxide film, wherein the oxide film comprises at least one element selected from Cr, Ni, Fe, Mn, Al, Si and B; the manufacturing method comprises: directly adding at least one element selected from Al, Si or B to a nickel-chromium alloy containing elements of Cr, Ni, Fe, Mn and C during the conventional cracking furnace tube manufacturing process to prepare the tube, then carrying out a heat treatment for the resulting tube under low oxygen partial pressure atmosphere to generate a layer of the metal and/or nonmetal oxide thin film on the inner surface of the tube; when the cracking furnace tube of the present invention is adopted for producing olefin with low carbon number by the petroleum hydrocarbon cracking furnace, the deposition of the coke on the inner wall of the furnace tube can be reduced by more than 70%.

The invention relates to a method for manufacturing a high steel grade sulfur-resistant drill pipe by laser cladding. In the method, in the condition of inert gas insulating air, nickel-base alloy anti-corrosion material is clad on the inner and outer pipe walls of an S135 steel grade drill pipe with conventional properties by laser, a nickel-base alloy anti-corrosion layer is clad on the non-thread area of a joint, threads are processed on the thread conical surface of the joint after a nickel-base alloy anti-corrosion layer is clad on the thread conical surface of the joint, and the end part of a pipe body is oppositely connected with the joint through friction welding; the output power of the laser is 3.5-4.5kW; laser beam spot size is not more than Phi 3mm; defocusing amount is 25-35mm; laser beam scanning line speed is 6.5-7.5mm/s; the inclined angle between the laser beam and the long axis direction of the pipe body is 40-50 degree; and the delivery rate of cladding wire material is 15-20g/s. The drilling pipe reaches the property of the S135 steel grade drilling pipe by the APE Spec standard. The cladding layer can effectively prevent a base body from contacting natural gas to improve the H2S-resistant stress corrosion cracking performance.

The invention provides a large-proportion methanol gasoline catalyst and a preparation method thereof. A product mark of the large-proportion methanol gasoline can be expressed by M50 and M85, wherein M represents a first letter of methanol; 50 and 85 respectively represent 50% of methanol and 85% of methanol are added in the gasoline The large-proportion methanol gasoline catalyst is obtained by mixing refined methanol with a purity of 99.9% and national standard gasoline or naphtha and component oil in presence of a special catalyst. A preparation method of the special catalyst is composed of high alcohols (C3-C11), alkanes (C5(C5H12), C6(C6H14), C7(C7H16), C8(C8H18) or CH3NO2), an organic amine, a plurality of esters and auxiliary inhibitors. The large-proportion methanol gasoline produced by the invention passes through a road test longer than 10,000 KM, without changing an engine structure. The large-proportion methanol gasoline is powerful, can be easily started at a low temperature, has no gas block at a high temperature, is not stratified when being contacted with water, can resist rubber swelling, and is low in production cost and flexible in operations. Besides, all project technical indicators are superior to those of national standard gasoline for vehicles. Practice proves that the large-proportion methanol gasoline catalyst has the advantages in a plurality of aspects such as technology, economy, feasibility for large-scale application, and the like, and has obvious competitive advantages as alternative energy.

The invention discloses a metal zinc negative electrode with a uniform mesoporous structure coating and a preparation method and application thereof, belonging to the technical field of aqueous zinc ion batteries. The metal zinc negative electrode comprises a zinc negative electrode and a clay slurry layer, and is prepared by pre-embedding zinc. The raw material powder of the clay slurry includes1-20wt% of polyvinylidene fluoride and 80-90wt% of clay material. The aqueous zinc ion battery negative electrode coating presented in the invention can play a role of a protective layer, isolate thedirect contact between the zinc negative electrode and the electrolyte to a certain extent, reduce the side reaction between the electrode and the electrolyte and improve the cycle stability. The layered porosity of the material itself can prevent dendrites from being generated and penetrating a diaphragm in the cycle process, alleviate the volume expansion of the negative electrode, reduce the occurrence of short circuit of the battery and improve the safety performance.

The invention discloses a high-temperature protective coating for steel billets and applications thereof, relates to a coating or cladding material temporarily applied before the heat treatment of alloys, and particularly relates to a coating or cladding material which is temporarily applied before the heat treatment of alloys and used for preventing the high-temperature decarburization of steel billets and reducing the difficulty of dephosphorization. The invention is designed for providing a high-temperature protective coating for steel billets, which can effectively reduce the surface decarburization layers of special steel billets. The high-temperature protective coating for steel billets disclosed by the invention comprises the following components in parts by mass: 15-50 parts of SiC, 10-25 parts of SiO2, 5-20 parts of Al2O3, 3-10 parts of Cr2O3, 5-15 parts of granulated blast furnace slags, 0.2 part of sodium hexametaphosphate and 0.2 part of celluloses. The coating of the invention can reduce the high-temperature oxidation burning loss of steel billets in a furnace, and meanwhile, alleviate the high-temperature dilution and decarburization of alloying elements on the surfaces of steel billets, and solve the problem that the difficulty of surface descaling of special steel is large; and an iron scale generating structure is modified by the coating, so that the high-pressure water descaling effect after steel billets are discharged out of a furnace is greatly increased. The coating disclosed by the invention is applied to the field of steel rolling.