613 results about "Paraffin wax" patented technology

The utility model relates to the technical field of paraffin oil cooling of pill dropping equipment, and discloses paraffin oil cooling circulation equipment which comprises a paraffin oil box, a cooling tank, a cooling machine and a circulating pump, the paraffin oil tank is provided with a first oil outlet pipe, a first oil inlet pipe, a second oil outlet pipe and a second oil inlet pipe; the first oil outlet pipe and the first oil inlet pipe are respectively configured to be communicated with two ends of a cooling pipe in the pill dropping machine; a cooling pipeline is arranged in the cooling tank, the bottom of the cooling tank is provided with an oil inlet end and an oil outlet end which are communicated with the two ends of the cooling pipeline respectively, the oil inlet end is communicated with the second oil outlet pipe through a pipeline, and the oil outlet end is communicated with the second oil inlet pipe through a pipeline; the input end and the output end of the cooling machine are both communicated with the cooling tank; and the circulating pump is arranged on a pipeline between the second oil outlet pipe and the oil inlet end of the cooling tank. The paraffin oil cooling circulation equipment provided by the utility model can solve the problem of how to improve the heat dissipation efficiency of the paraffin oil.

The invention relates to the field of coatings, and discloses a biomass-based oil-resistant coating and a preparation method thereof, the coating comprises an additive solution, a paraffin solution and gallic acid; the paraffin solution is obtained by dissolving paraffin in absolute ethyl alcohol; a preparation method of the additive solution comprises the following steps: mixing chitosan powder and an acetic acid aqueous solution to prepare a chitosan solution, ultrasonically dispersing functionalized montmorillonite in deionized water to prepare a suspension, then uniformly mixing the chitosan solution and the suspension, adding modified phytic acid prepared by grafting phytic acid and ethylene glycol diglycidyl ether, and stirring to react; the functional montmorillonite is prepared by modifying modified montmorillonite with titanium dioxide and zinc oxide, then activating the modified montmorillonite with 3-aminopropyltriethoxysilane and succinic anhydride, and then carrying out a ring-opening reaction with glycidyl neodecanoate. The coating prepared by the invention has high water resistance, the Kit oil-proof grade is kept at grade 12, and the oil-proof performance of the coating is greatly improved. Meanwhile, the antibacterial performance, the tensile index and the ultraviolet aging resistance are relatively high.

The invention provides a phase change enhanced ablation-resistant modified liquid silicone rubber material as well as a preparation method and application thereof, and belongs to the field of advanced materials. According to the invention, paraffin is adopted as a phase change filler, so that the ablation resistance and heat insulation performance of the expanded ceramic liquid silicone rubber material are remarkably improved, and the prepared silicone rubber composite material has the advantages of low density, low ablation surface temperature, strong carbon layer and high heat absorption capacity. The phase-change reinforced modified expanded ceramic flexible ablation-resistant material further improves the ablation resistance and high-temperature heat insulation performance of a liquid silicone rubber material, and has a good application prospect in the fields of aerospace thermal protection, building heat insulation and the like.

The invention relates to the field of resource recycling, and discloses an iron slag ash and waste soil composite curing agent as well as a preparation method and application thereof. The composite curing agent comprises the following components in parts by weight: 30-50 parts of iron slag ash; 20 to 40 parts of waste soil; 10-20 parts of industrial alkaline residues; 5-10 parts of a functional auxiliary agent; 3-5 parts of a curing synergist; the curing synergist is composed of an inner core and a coating layer, the inner core material comprises a porous carrier and an exciting agent, and the film forming material of the coating layer is one or more of stearic acid, paraffin and polyethylene wax; the weight ratio of the core material to the coating layer material is (8-9): 1. According to the composite curing agent, resource utilization of waste is achieved, the material cost is remarkably reduced, and the composite curing agent is particularly suitable for flow-state backfilling, light filling and sludge in-situ curing and has remarkable environmental protection and economic benefits.

A tamper for making paraffin blocks for histology may include a pliable tamper head and a handle. The handle may be permanently or removably attached to the tamper by using screws, magnets, or the like. The tamper may be made from a pliable material, such as a silicone rubber, with improved thermal transfer and high latent heat. In use, the tamper may be warmed in advance to a working temperature by placing the tamper on a hot plate of the embedding station or on a dedicated smaller hot plate. Alternatively, the tamper may be heated with an electric resistive element, a thermoelectric device, or an electric induction coil.

The utility model provides a rotary type paraffin slicing device which comprises a bottom plate, a shell is fixedly connected to the upper surface of the bottom plate, a threaded rod is rotationally connected to the interior of the shell, a handle is fixedly connected to the outer wall of the threaded rod, a sliding block is in threaded connection to the outer wall of the threaded rod, a supporting shaft is fixedly connected to the outer wall of the sliding block, and the supporting shaft is fixedly connected to the outer wall of the sliding block. A slicing knife is fixedly connected to the outer wall of the supporting shaft, a sliding shaft is slidably connected to the interior of the sliding block, and a fixing assembly is arranged on the outer wall of the limiting block and used for fixedly clamping a paraffin block. According to the paraffin slicing device, the slicing knife can be driven to move through mutual matching of the handle, the shell, the threaded rod, the supporting shaft, the sliding block and the sliding shaft, so that paraffin blocks are in contact with the slicing knife, the paraffin blocks with different thicknesses and hardness can be supported to be sliced through the movable slicing knife structure, and the paraffin slicing device is suitable for various scientific research and clinical scenes.

An electronic candle includes: a wax tube, a battery compartment, and a PCBA board. The wax tube is cylindrical and made from paraffin wax. The wax tube defines a cavity therein and has a first end and a second end, the second end defines an opening communicated to the cavity. The battery compartment is inserted into the cavity from the second end, the battery compartment has a third end and a fourth end, the fourth end defines an opening facing towards the first end. The PCBA board is inserted to the fourth end. The PCBA board is elongated. A maximum width of the PCBA board is in an interference fit with an inner diameter of the battery compartment, enabling the PCBA board to be snapped with the battery compartment.

The invention relates to the technical field of ink, in particular to high-stability digital discharge printing ink-jet ink and a preparation process thereof. The high-stability digital discharge printing ink-jet ink is prepared from the following raw materials in parts by weight: 60-80 parts of a solvent, 10-20 parts of a discharge agent, 2-4 parts of filler, 1-3 parts of a humectant and 0.4-1 part of an active agent. According to the invention, sodium alginate is used as natural anionic polysaccharide, nano calcium carbonate in the filler can be wrapped through hydrogen bonds and electrostatic interaction by using hydroxyl and carboxyl contained in a molecular chain of sodium alginate to form composite structure microspheres, and Span 80 and paraffin can further modify the surface morphology of the microspheres by using hydrophobic interaction of Span 80 and paraffin; after the ink is dried, the composite structure microspheres can be combined with ink components, a continuous film is formed on the surface of a fabric, nano calcium carbonate and adsorbed pigment molecules are fixed, damage of external factors to pigments is isolated, the coloring life is prolonged, and therefore the stability of the digital discharge printing ink-jet ink is improved.

The invention discloses an attached fireproof fire extinguishing pad which comprises a first fire extinguishing layer, a second fire extinguishing layer, a heat insulation layer and an adhesive layer which are fixedly connected in sequence. The first fire extinguishing layer and the second fire extinguishing layer are both composed of adhesives and fire extinguishing microcapsules, and each fire extinguishing microcapsule comprises a capsule shell composed of macromolecule resin, low-melting-point paraffin and expanded graphite and a perfluorohexanone capsule core packaged in the capsule shell. The content of an adhesive in the first fire extinguishing layer is high, and the content of fire extinguishing microcapsules is low; and the second fire extinguishing layer is relatively low in adhesive content and relatively high in fire extinguishing micro-capsule content. When in use, the fireproof fire-extinguishing pad is attached to a protective surface through the adhesive layer, and the first fire-extinguishing layer faces a fire position. When a fire occurs, the surface adhesive is heated and melted, the fire extinguishing micro-capsules are released, the micro-capsules are heated and blasted to release perfluorohexanone, and first-time rapid fire extinguishing is achieved. And if the fire behavior is continuous, the second layer is started immediately after the first layer is used up, and a larger dosage of fire extinguishing agent is provided for supplementary fire extinguishing, so that the reliability and continuity of fire extinguishing are remarkably improved.

The present invention relates to the field of oil and gas field chemistry, and in particular to a polymeric anti-wax pour-point depressant and a preparation method therefor. The present invention discloses a polymeric anti-wax pour-point depressant. A polymer in the polymeric anti-wax pour-point depressant comprises a structural unit A and a structural unit B, wherein in the structural unit A, R1 is C16-C22 alkyl; and in the structural unit B, R2 is C12-C22 alkyl. The polymeric anti-wax pour-point depressant provided by the present invention requires a small addition amount and shows a good anti-wax effect, and compared with conventional anti-wax agents, the polymeric anti-wax pour-point depressant can effectively inhibit precipitation of high-carbon-number paraffins in crude oil, greatly mitigates blockage of crude oil wellbores and transportation pipelines caused by paraffin deposition in crude oil, and has low construction costs and a simple field construction process.

The invention relates to a low-thermal-resistance phase change heat conduction material and a preparation method thereof, and belongs to the technical field of thermal interface materials. The phase-change-resistant heat conduction material comprises the following components in percentage by weight: 22 to 30 percent of porous BN-paraffin phase change agent, 8.5 to 10.2 percent of nano aluminum nitride, 3.5 to 4.1 percent of reactive diluent and the balance of room-temperature cured silicone rubber, according to the porous BN-paraffin phase change agent, porous BN serves as a carrier, phase change paraffin is packaged in pores, and compared with the prior art, the porous BN-paraffin phase change agent has the advantages that the pore wall of the packaged BN serves as a thermal bridge, the contact probability between the phase change agents is increased, rapid diffusion of heat in a composite material is promoted, phase change latent heat of the paraffin is fully released and conducted, and the phase change performance of the phase change agent is improved. Not only is the problem of paraffin leakage solved, but also the thermal resistance is obviously reduced.

The invention relates to the technical field of mine blasting, and discloses a high-temperature blasting drilling multi-layer thermal insulation charging device for strip mines, which comprises a multi-layer thermal insulation sleeve, a temperature monitoring module, an active cooling module and a quick release mechanism, the multi-layer thermal insulation sleeve comprises a phase change heat absorption layer, and an aerogel thermal insulation layer is fixedly mounted on the outer wall of the phase change heat absorption layer; a metal reflecting layer is fixedly installed on the outer wall of the aerogel heat insulation layer, the multiple layers of heat insulation sleeves are arranged, the high temperature of the external environment is effectively isolated through the multiple layers of structures of the multiple layers of heat insulation sleeves, internal explosives are protected against the influence of the high temperature, and the phase change heat absorption layer utilizes the phase change heat absorption characteristic of a paraffin-graphene composite material; a large amount of heat is absorbed and stored, temperature rise is effectively slowed down, the aerogel heat insulation layer further blocks heat transfer due to extremely low heat conductivity and excellent heat insulation performance, the metal reflection layer can effectively reflect solar radiation and heat radiation in the surrounding environment, and heat absorption is reduced.

The invention relates to the technical field of phase-change materials, and discloses a light-operated composite phase-change material catalyst and a preparation method and application thereof, and a light-operated phase-change composite material is a paraffin-encapsulated metal M / halloysite / sodium alginate composite phase-change material; according to the metal M / halloysite / sodium alginate composite phase change material for packaging the paraffin, halloysite / sodium alginate aerogel loaded by metal M nanoparticles is used as a supporting material, and the paraffin is packaged in the metal M / halloysite / sodium alginate composite phase change material. According to the invention, the metal M / halloysite / sodium alginate composite phase change material for packaging paraffin is prepared by using the halloysite nanotube, the aerogel in the invention has a relatively large paraffin encapsulation amount, the encapsulation efficiency can reach up to 86%, and the phase change material can still maintain good mechanical and chemical stability after multiple heat absorption and release cycles. The melting and solidification of paraffin in the composite phase change material are controlled by turning on and turning off the light source, and the exposure and shielding of active sites are realized, so that the catalytic reaction is accurately started and stopped, and the complete starting and pausing of the reaction are realized.

The invention discloses a self-expansion and self-diffusion stopping agent for preventing and treating spontaneous combustion of coal in a goaf and a preparation and use method of the stopping agent. Firstly, paraffin is used for blocking a round hole of the middle interlayer, then the two stainless steel hemispheres and the middle interlayer are welded to form a liquid-leakage-free stopping agent shell, finally, a component A, a component B and SF6 tracer gas are injected into the two hemispheres respectively, and injection openings are sealed. The stopping agent stably exists for a long time when no high-temperature heat source exists in the goaf, when the coal spontaneous combustion heat source appears, the stopping agent is heated, the paraffin of the interlayer in the shell and the hole sealing material of the injection opening are sequentially melted, the component A and the component B are mixed and react to release CO2 gas to be self-expanded to form stopping foam fluid, and the stopping foam fluid is sprayed out of the shell; spontaneously seeping and diffusing in goaf fractures, covering and wrapping a fire source, rapidly extinguishing fire, cooling and inhibiting coal spontaneous combustion; and meanwhile, the SF6 tracer gas is quickly extruded out of the shell, so that high-temperature hidden danger early warning is realized, and a basis is provided for making follow-up coal spontaneous combustion disaster prevention and control technical measures.

The invention discloses a preparation method of a composite phase change material, a thermal-insulation and antibacterial fabric and a preparation method thereof, and belongs to the field of functional textile fabrics and preparation thereof. The composite phase change material provided by the invention can be applied as a coating finishing component, and the preparation method comprises the following steps: taking polystyrene microspheres as a core, and forming a composite precursor through dopamine self-polymerization coating; and compounding the composite precursor with a layered double-metal hydroxide, and calcining to obtain the carbon microsphere supported layered double-metal oxide material with a hollow structure, and mixing the carbon microsphere supported layered bimetal oxide material with paraffin, and loading to obtain the carbon microsphere supported layered bimetal oxide material. The textile fiber fabric provided by the invention has excellent thermal insulation and antibacterial characteristics, is good in comfort, and has wide application prospects in industrial production and clothing application.

The invention relates to the technical field of high polymer material and automobile part manufacturing, and discloses a high-durability high-low temperature resistant automobile composite sealing strip, which is prepared from the following raw materials: ethylene propylene diene monomer, polyisoprene grafted maleic anhydride, pre-dispersed master batch, carbon black and a vulcanization system. The pre-dispersed master batch takes oxidized polyethlene wax as a carrier to wrap zinc oxide and D-mannitol. The phase change characteristic of the carrier is utilized, active components are isolated in the mixing and extruding stage, and scorching is prevented; the components are released in the high-temperature vulcanization stage to initiate anhydride ring opening, and a double cross-linked network with coexistence of covalent bonds and ionic bonds is constructed. According to the sealing strip, the macromolecular reactive plasticizer is used for replacing part of liquid paraffin, the atomization problem caused by micromolecule migration is solved, the high-temperature compression permanent deformation rate is remarkably reduced through a thermal reversible mechanism of an ion cluster, and excellent low-temperature rebound resilience and processing safety are both considered.

The invention discloses artificial board emulsifying wax, which is prepared from the following raw materials in percentage by mass: 25 to 40 percent of paraffin, 3 to 5 percent of compound emulsifier, 2 to 4 percent of cationic starch, 3 to 7 percent of liquid polybutadiene and 44 to 67 percent of water, the compound emulsifier is a nonionic emulsifier, and the hydrophilic-lipophilic balance value is 9-10. The artificial board emulsifying wax is good in waterproofness and high in strength when applied to artificial boards.

The invention relates to the technical field of building materials, and discloses a preparation method of biomass aggregate lightweight wall impervious concrete and concrete.The preparation method comprises the following steps that 1, biomass aggregate is pretreated, specifically, a rice hull or straw biomass raw material and a sintering agent are mixed, pressed and formed, sintering in a vacuum furnace to prepare biomass-based wood ceramic spherical particles; (2) aggregate surface hydrophobic treatment: pretreating the biomass-based wood ceramic spherical particles obtained in the step (1) with a surfactant solution, and then carrying out vacuum impregnation treatment with a paraffin-silane composite emulsion; by adopting surfactant pretreatment and a paraffin-silane composite emulsion vacuum impregnation process, a surfactant can reduce the surface tension of an emulsion and promote a hydrophobic component to permeate into internal pores of the aggregate, and a vacuum environment eliminates air resistance in the pores, so that a hydrophobic material and pore walls of the aggregate form firm combination, and the hydrophobic effect is more lasting.

The invention relates to a method for manufacturing a mould for obtaining paraffin blocks of TMA, comprising at least the following steps: a) obtaining a base mould by 3D printing, said base mould comprising a number of first holes forming an array; b) filling the base mould with a mixture of silicone in a semi-liquid state and a catalyst in a liquid state at room temperature; c) curing the mixture of silicone and catalyst at room temperature until a second mold is obtained and demolding the second mold from the base mold, the second mold comprising a plurality of protrusions corresponding to the first holes of the base mold.

The invention discloses a flame-retardant PVC (polyvinyl chloride) wood-plastic plate which is prepared from the following raw materials in parts by weight: 100 parts of SG-7 type PVC resin; 20-30 parts of modified wood powder; the composite flame retardant is composed of ammonium polyphosphate, aluminum hydroxide, molybdenum trioxide and zinc borate according to the weight ratio of 15: 20: 16: 4; the mass ratio of the aluminum-titanium composite coupling agent to the wood flour is 1: 100; 5-8 parts of a calcium-zinc stabilizer; the lubricant is composed of polyethylene wax, paraffin and calcium stearate according to the weight ratio of 1: 1: 1; and 5-10 parts of an acetyl butyl citrate plasticizer. The invention relates to the technical field of polymer composite materials, in particular to a flame-retardant PVC wood-plastic plate and a preparation method thereof.The flame-retardant PVC wood-plastic plate and the preparation method thereof have the remarkable advantages that due to a composite flame retardant, the oxygen index of the plate reaches 32.1%, the combustion performance reaches the UL94V-0 level, and the smoke density is reduced by 72.1%; the tensile strength, the impact strength and the bending strength are respectively improved by 339.6%, 59.1% and 179.5% when the wood powder is treated by the aluminum-titanium coupling agent; the extrusion temperature of 150-175 DEG C and the screw rotating speed of 12-18 r / min are accurately controlled, the problems of wood powder carbonization and flame retardant decomposition are avoided, and the quality consistency is guaranteed.

The invention discloses a phase-change radiation refrigeration coating which is prepared by the following steps: dispersing nano aluminum oxide particles in phase-change paraffin in advance to form a high-thermal-conductivity and high-radiation composite phase-change material, and encapsulating the high-thermal-conductivity and high-radiation composite phase-change material in a porous ceramic skeleton through vacuum infusion to obtain composite phase-change ceramic particles; then, the composite phase-change ceramic particles are dispersed in polyol resin containing aluminum oxide microspheres, the aluminum oxide microspheres accurately block pores in the surface of the porous ceramic through particle size matching, paraffin leakage is prevented, and the aluminum oxide microspheres serve as heat conduction channels and radiation units at the same time, so that it is guaranteed that the finally prepared coating integrates phase-change temperature control, efficient heat conduction and radiation refrigeration; the high sunlight reflectivity (94%-98%) and the high atmospheric window infrared emissivity (92%-96%) are achieved, and the thermal response rate and the leakproof performance are remarkably improved.

Disclosed in the present invention are a sustained-fragrance-release ceramic material and a preparation method therefor. The present invention relates to the technical field of fragrance products. The preparation method comprises: S1, uniformly mixing flaky aluminum oxide and calcined kaolin powder; S2, heating and stirring the powder while adding molten liquid paraffin in a hot state and an additive, and stirring the mixture to obtain a ceramic slurry; S3, subjecting the prepared ceramic slurry to vacuum evacuation, stirring, and hot-press molding to obtain a ceramic green body; S4, embedding the ceramic green body in sintered aluminum oxide powder, then placing same in a kiln for primary firing, taking out an embedded and fired ceramic block after cooling, and then performing surface treatment; and S5, impregnating the treated ceramic block with fragrance, and after the impregnation with the fragrance is complete, performing encapsulation after the surface of the ceramic block is dried. By optimizing the microporous structure of porous ceramic blocks and using hot-press molding, the present invention resolves the contradiction between light weight and high strength in conventional porous ceramics while exhibiting a relatively high porosity.

The present invention addresses the problem of providing a laminate that is easily manipulated and results in little damage to an original paraffin block sample when a paraffin section sample is prepared, a production method for the laminate, a preparation method for a paraffin section sample, and a preparation method for a paraffin sample piece.　Provided is a laminate that includes a substrate, a first paraffin layer that is provided on at least a portion of the surface of the substrate, and a second paraffin layer that is provided on at least a portion of the first paraffin layer, the melting point T1 of a first paraffin that constitutes the first paraffin layer being higher than the melting point T2 of a second paraffin that constitutes the second paraffin layer.

This application relates to a preparation mold and method for gel casting of reaction-bonded silicon carbide barrels, belonging to the field of silicon carbide product technology. It includes an inner cylinder, an outer tube, and an outer cylinder. The outer tube is sleeved outside the inner cylinder. One end of the inner cylinder extends out of the outer tube and is connected to a first base plate. The outer tube abuts against the surface of the first base plate. A first molding cavity is formed between the inner wall of the outer tube and the outer wall of the inner cylinder. The first molding cavity is used for pouring paraffin wax and forming the inner barrel mold. The inner diameter of the outer cylinder is larger than the diameter of the inner barrel mold. A second base plate is provided on the inner wall of one end of the outer cylinder. After the inner barrel mold is inserted into the outer cylinder, it abuts against the second base plate. A second molding cavity is formed between the inner wall of the outer cylinder and the outer wall of the inner barrel mold. The second molding cavity is used for pouring gel-based sauce and forming the silicon carbide barrel blank. This application has the effect of improving the removal efficiency of the inner mold and the forming quality of the inner wall of the silicon carbide barrel blank in the gel casting process.

The invention discloses a precipitation-free rubber material for a stabilizer bar bushing and a preparation method of the precipitation-free rubber material, and particularly relates to the technical field of automobile part materials. The precipitation-free rubber material for the stabilizer bar bushing comprises 100 parts of natural rubber; 4-8 parts of zinc oxide; 1-3 parts of stearic acid; 3-8 parts of a compound anti-aging agent; 20 to 60 parts of carbon black; 0.3-2 parts of a vulcanizing agent; 1.5 to 5.5 parts of a compound accelerant; and 0.1 to 0.5 part of scorch retarder. The anti-aging agent in the formula is reasonably matched to replace traditional protective paraffin, the problem of protective paraffin precipitation is avoided while the excellent ozone resistance of the rubber material is ensured, the problem of secondary bonding degumming of the stabilizer bar bushing is effectively solved, and the rubber material also has good hardness, breaking strength, elongation at break, pressure change and other physical properties, and is suitable for popularization and application. The anti-aging performance is better, and the service life is long.

This invention provides a solar temperature-controlled backsheet based on a shaped phase change material and its preparation method, belonging to the field of solar panel manufacturing technology. The invention involves uniformly mixing paraffin powder and premixed epoxy resin at a mass ratio of (7-6):(3-4), followed by curing to prepare a waterproof coating film on the surface, thus obtaining a solar temperature-controlled backsheet based on a shaped phase change material. This invention uses epoxy resin directly cured with paraffin powder, resulting in a phase change composite material with excellent mechanical properties, facilitating its processing into complex configurations. Simultaneously, it effectively increases the proportion of phase change thermal storage material. The prepared waterproof coating film further prevents the loss of phase change thermal storage material inside the solar temperature-controlled backsheet. The solar temperature-controlled backsheet of this invention can directly or closely contact the solar cells, allowing for more direct and effective temperature control of the cells, improving cell efficiency and lifespan.

The invention discloses freeze-thaw-resistant concrete and a preparation method thereof. The freeze-thaw-resistant concrete is prepared from the following raw materials: cement, river sand, gravel, water, isoprene rubber particles coated with paraffin on the surfaces and an additive, the preparation method comprises the following steps: uniformly mixing the river sand and the isoprene rubber particles coated with the paraffin on the surface, adding other raw materials, and uniformly mixing. Space generated after the isoprene rubber particles are extruded provides space for freezing expansion of free water, expansion pressure is relieved, the freeze-thaw resistance of concrete is improved, the surfaces of the isoprene rubber particles are coated with paraffin, and under the freeze-thaw condition, the paraffin is solidified, releases heat and reduces osmotic pressure and ice expansion pressure, so that the freeze-thaw resistance of the concrete is improved, and the service life of the concrete is prolonged. The paraffin surrounds the isoprene rubber particles, erosion of water to the isoprene rubber particles can be reduced, aging of the isoprene rubber particles can be inhibited, the thermal conductivity of the paraffin and the isoprene rubber particles is smaller than that of aggregate, temperature reduction of the aggregate can be inhibited, and the freeze-thaw resistance of the concrete is further improved.

The application discloses a paraffin solid sealing furnace for a vehicle-mounted superconducting magnet coil, wherein the melting paraffin cabin and the solid sealing cabin are combined into one, and the structure is compact; the paraffin groove is arranged in the solid sealing furnace, the original paraffin pipeline exposed to the environment can be cancelled, the temperature reduction, solidification, blockage and injection of paraffin in the pipeline due to flow can be avoided, the pouring process is smooth and controllable, and a good solid sealing effect is achieved. In terms of temperature control, mainly using air convection to conduct heat transfer, scientifically arranging the electric heating pipe and the turbulence fan, effectively eliminating the temperature gradient inside the coil and the paraffin, and improving the uniformity of the temperature distribution. In terms of pouring control, the vibration exciter arranged below the superconducting coil tray can effectively accelerate the discharge of bubbles inside the coil. In terms of vacuum control, only slight negative pressure in the furnace needs to be maintained, which greatly reduces the performance of the vacuum pump, the sealing requirement of the furnace body, the manufacturing difficulty and the cost.

The application discloses an electronic candle, comprising: a wax tube made of paraffin, the wax tube comprising an outer surface; the lamp string is arranged in the wax tube and is prevented from penetrating through the outer surface of the wax tube; the lamp string is electrically connected with the machine core assembly, and according to the electronic candle, the attractiveness is enhanced, and the light-emitting area of the lamp string is increased.

The present invention provides an aqueous resin composition that can be suitably used for an aqueous coating solution capable of forming a coating layer that has excellent substrate adhesion, blocking resistance, heat seal blocking resistance, hot melt adhesive properties, and scratch resistance, as well as transparency. [Solution] This aqueous resin composition is used in an aqueous coating solution that produces a coating film with a haze value of 15% or less. The aqueous resin composition contains an emulsion of polyolefin resin (polyolefin resin emulsion) having a melting point of 60 to 97°C and an acid value of 13 to 60 mgKOH / g, as well as a polyethylene wax and / or paraffin wax. Based on the mass of the solids in the aqueous resin composition, the polyolefin resin content is 60 to 95 mass% and the wax content is 4 to 25 mass%, with the mass ratio of polyolefin resin:wax being 1:0.043 to 1:0.300.