24results about How to "Heat resistant" patented technology

The invention discloses three novel corynebacterium glutamicum heat-resistant elements and application thereof, and belongs to the technical field of bioengineering. Three heat-resistant genes are obtained from corynebacterium glutamicum research. The heat-resistant gene and a promoter Ptuf are connected and are combined and transformed in corynebacterium glutamicum. The heat-resistant element is introduced into a plasmid and is expressed in corynebacterium glutamicum. After 24 hours of high-temperature culture at 42 DEG C, the OD600 of the corynebacterium glutamicum containing the heat-resistant element and the plasmid is improved, and the growth condition of the corynebacterium glutamicum at 42 DEG C is obviously superior to that of the starting corynebacterium glutamicum. Therefore, the heat-resistant elements can obviously improve the heat resistance of corynebacterium glutamicum under a high-temperature culture condition. The method has important application value in improvement of the thermal stability of corynebacterium glutamicum and industrial production prospect.

The utility model relates to the technical field of fireproof doors, and discloses a fireproof door with a fire extinguishing function, which comprises a door frame and two door leaves, the door frame and the door leaves are made of steel materials, the two door leaves rotate on the inner side of the door frame through hinges, one side of one door leaf is fixedly provided with a fireproof lock, and the other side of the other door leaf is fixedly provided with a fire extinguishing door. Fireproof glass is fixedly arranged on the two door leaves, seam covering plates are fixedly arranged on the inner sides of the two door leaves, first expansion fireproof sealing rubber strips are fixedly arranged on the inner sides of the two door leaves and located on one sides of the seam covering plates, and second expansion fireproof sealing rubber strips are fixedly arranged on the inner sides of the door frames. According to the fireproof door, the fire condition can be observed conveniently, meanwhile, the fireproof door has certain heat resistance and fire resistance, the function of slowing down fire spreading is achieved, evacuation time is prolonged for refugees, and therefore the practicability and multifunctionality of the fireproof door are improved.

The utility model discloses a kind of heat-insulated fireproof doors, comprising: door frame and two groups of fireproof door panels, two groups of fireproof door panels are fixedly installed with heat insulation layer between, heat insulation layer one end is provided with installation port, installation port is fixedly installed with door gap plugging mechanism, and the plugging end of door gap plugging mechanism extends from the gap between two groups of fireproof door panels, and two groups of fireproof door panels are rotatably installed in door frame, and then make door gap plugging mechanism can extend from between fireproof door panel and touch on the inner wall surface of door frame.The application is designed by door gap plugging mechanism, so that it passes through the double protection mechanism of " primary sealing + automatic plugging", first by fireproof door panel and spacer plate form preliminary blocking, then utilize zirconium fibre composite felt to automatically expand and fill gap when fire, substantially delay the speed of high-temperature dense smoke diffusion to indoor, and gain more escape time for personnel.

The application relates to the technical field of batteries, in particular to a diaphragm and a battery comprising the diaphragm. The diaphragm comprises a ceramic layer, the ceramic layer comprises ceramic particles, the ceramic particles have a core-shell structure, the core of the ceramic particles comprises inorganic particles, and the shell of the ceramic particles comprises a first polymer; the first polymer comprises repeating unit A, repeating unit B and repeating unit C; the structural formula of the repeating unit A is *-CH2-(CH3)C(COOCH3)-*; the structural formula of the repeating unit B is *-CH2-CH(OCOCH3)-*; the repeating unit C comprises one or more of C2-6 alkyl and * represents a connecting end; the repeating unit A is an end group of at least any one end of the first polymer; the weight percentage of the repeating unit B in the first polymer is 3%-11%, and the weight percentage of the repeating unit A is 40%-85%. The diaphragm of the application can quickly realize the thermal shutdown function in a high-temperature environment, can maintain good physical properties, has high adhesion with pole pieces, and makes the battery have high safety and good long-cycle stability.

The present application relates to a separator for nonaqueous secondary batteries and a nonaqueous secondary battery. A separator for nonaqueous secondary batteries, which has a porous substrate and a heat-resistant porous layer provided on one side or both sides of the porous substrate, the heat-resistant porous layer containing a polyvinylidene fluoride-based resin A, a polyvinylidene fluoride-based resin B, and a filler, the polyvinylidene fluoride-based resin A being a polyvinylidene fluoride-based resin containing a tetrafluoroethylene unit, the polyvinylidene fluoride-based resin B being a polyvinylidene fluoride-based resin other than the polyvinylidene fluoride-based resin A, the polyvinylidene fluoride-based resin B being a homopolymer of vinylidene fluoride or a copolymer of vinylidene fluoride and a monomer other than tetrafluoroethylene, the average primary particle diameter of the filler included in the heat-resistant porous layer being 0.01 to 0.5 µm.

This invention discloses a hot melt adhesive for high-temperature protective clothing and its preparation method, comprising the following raw materials: Fischer-Tropsch wax, styrene-isoprene-styrene block copolymer with 0% diblock content, styrene-isoprene-styrene block copolymer with 20-30% diblock content, styrene-isoprene-styrene block copolymer with 40-50% diblock content, rosin resin, petroleum resin, ethylene-vinyl acetate copolymer, and antioxidant. This hot melt adhesive requires no toxic solvents, possesses both heat resistance and water resistance, and is suitable for high-temperature protective clothing. The preparation method of this hot melt adhesive involves heating and mixing polymer materials without adding any solvents or toxic substances during the preparation process, reducing the risk of toluene poisoning, completely solving the problems of solvent evaporation and recovery, and, more importantly, eliminating safety hazards in the storage and use of organic chemicals, achieving environmentally friendly, safe, and efficient production.

This invention provides a water-based coating for anti-slip and heat-resistant bamboo mats. The coating comprises a water-based penetrating primer layer, a water-based colored topcoat layer, a water-based water-resistant and heat-resistant coating, and a water-based anti-slip and wear-resistant coating. These four layers are sequentially applied to a bamboo substrate. This invention consists of four coating layers, which, when applied to a bamboo substrate, endow the bamboo product with excellent anti-slip, wear-resistant, water-resistant, and heat-resistant properties.

The invention relates to the technical field of lithium ion batteries, in particular to a high-temperature-resistant electrolyte and a lithium ion battery. The high-temperature-resistant electrolyte comprises a lithium salt, an organic solvent, a film-forming additive and a high-temperature-resistant additive; based on the total mass of the high-temperature-resistant electrolyte being 100%, the content of the high-temperature-resistant additive is 1-5%; the high-temperature-resistant additive is selected from a combination of diphenylphosphonyl hydroxylamine and phenylphosphonyl nitrile. The high-temperature-resistant additive is introduced into the high-temperature-resistant electrolyte provided by the invention, so that a stable and compact SEI film can be formed on the surface of a negative electrode, dendritic crystal growth is inhibited, active lithium loss is reduced, meanwhile, a high-temperature-resistant protective layer is generated on the positive electrode side, and the anti-oxidation stability of a positive electrode interface is effectively improved, so that the electrode interface has compactness and heat resistance; and the interface stability at high temperature is obviously improved, so that the battery applying the composite material has excellent high-temperature cycle performance.

The invention belongs to the technical field of composite soft plastic packaging, and particularly relates to a high-transparency compostable degradable film as well as a preparation process and application thereof. The film provided by the invention is prepared from 89.5-99.5 parts by mass of PLA, 0-10 parts by mass of PBAT, 0-5.5 parts by mass of LLDPE and 0.5-1.0 part by mass of an auxiliary agent through a tape casting process, wherein the auxiliary agent is a silane combination agent. The prepared film not only has a good transparency effect, but also is suitable for a compostable and degradable environment, and is beneficial to environment protection.

The utility model discloses a high-temperature-resistant polyvinylidene fluoride plate, and relates to the technical field of plates. The utility model is composed of an assembling assembly and a housing assembly. The assembling assembly comprises a plurality of base material plates, a first side edge plate and a second side edge plate are further connected to the two base material plates on the outermost side in an inserted mode respectively, and the joint of every two opposite base material plates is covered with an angle plate. The outer side of the base material plate is further covered with a shell assembly, the inner wall of the upper shell and the inner wall of the lower shell are each provided with a connecting assembly, the outer side wall of the upper shell and the outer side wall of the lower shell are coated with a heat-resisting coating, the innermost side of the upper shell and the innermost side of the lower shell are provided with PVDF base materials, and mesh plates are arranged between the heat-resisting coatings and the PVDF base materials. The heat-resistant performance of the polyvinylidene fluoride plate is further improved by utilizing the heat-resistant coating and the mesh plate, and the base material plate, the side edge plate I, the side edge plate II and the angle plate are mutually spliced to form the polyvinylidene fluoride plate, so that the loading capacity of the plate can be improved, and the service life of the plate can be prolonged.

The present invention discloses a kind of glue for flocking and its preparation method, and relates to the field of adhesives. A kind of glue for flocking is prepared by the following raw materials including parts by weight: 45-65 parts of soft monomers; 6-15 parts of hard monomers; 1.5-3 parts of eleostearic acid; 1-4 parts of cross-linking monomers; 2-4 parts of glycidyl methacrylate; 1-3 parts of methacryloyloxyethyl phosphate; 0.5-2 parts of emulsifiers; 0.5-1 parts of initiators; 0.05-0.2 parts of regulators; 65-120 parts of deionized water; wherein, the cross-linking monomers are selected from one or more of ethylene glycol dimethacrylate, diacetone acrylamide / adipic acid dihydrazide, and the weight ratio of the diacetone acrylamide and the adipic acid dihydrazide is (1.8-2.1): (0.8-1.3). The present application has the effect of taking into account both the flocking fastness and the feel of the flocking product.

The invention discloses a polycarbonate composition as well as a preparation method and application thereof. The polycarbonate composition comprises the following components in parts by weight: a, polycarbonate resin; b parts of amorphous copolyester PCTG; c parts of an inorganic filler; d) a styrene-maleic anhydride copolymer; the polycarbonate resin comprises silicon copolymerized polycarbonate and non-silicon copolymerized polycarbonate, and based on the weight of the polycarbonate resin, the weight percentage of the silicon copolymerized polycarbonate is e; wherein the relation of a, b, c, d and e meets the condition that 100a / (a + b) is greater than or equal to 33; 100c / (a + b) < = 2.5; 3 < = 100d / (a + b) < = 7; and ae / (a + b) > = 0.22. The polycarbonate composition disclosed by the invention has good impact resistance at low temperature below zero on the basis of maintaining a certain light transmittance.

The invention discloses a compound microbial agent for efficiently producing acid from kitchen waste and application of the compound microbial agent, and belongs to the technical field of waste treatment. The compound microbial agent disclosed by the invention comprises bacillus amyloliquefaciens, bacillus tequilensis and bacillus licheniformis. According to the method, a bacillus group is selected to prepare a kitchen waste fermentation microbial inoculum, and a multi-stage fermentation culture method of a mixed flora is adopted, so that the thallus quantity and activity of the bacillus are improved, the decomposition rate of large organic matters in the kitchen waste is increased, synthesis of downstream organic acids is promoted, and the yield of the organic acids is increased; a novel microbial resource is developed for efficient acid production of the kitchen waste, and a more efficient method is provided for kitchen waste treatment and sewage treatment.

The invention discloses a complex microbial inoculant as well as a preparation method and application thereof, and belongs to the technical field of microorganisms. The complex microbial inoculant disclosed by the invention is prepared by co-fermentation of lactobacillus plantarum CGMCC (China General Microbiological Culture Collection Center) NO.12849 and enterococcus faecium CGMCC The complex microbial inoculant has the characteristics of high antibacterial activity, safety, no toxicity, high stability and the like, and can be used for killing clinically common gram-negative pathogenic bacteria. By utilizing the high-density fermentation culture medium, the fermentation process and the preparation process provided by the invention, the complex microbial inoculant can be produced on a large scale and is low in cost, and the complex microbial inoculant is expected to replace antibiotics to become a safe, green and efficient ideal antibacterial agent and has a very wide application prospect.

The utility model provides a rack and equipment for testing a circuit board, the rack is made of marble materials, the marble materials enable the rack to be high in hardness and large in mass, the stability of the rack in the circuit board testing process is guaranteed, vibration generated in the equipment operation process is prevented, meanwhile, the rack is large in density and low in water absorption, and the service life of the rack is prolonged. The circuit board testing device has the advantages that the circuit board testing device can adapt to the humid environment, the rack has heat conductivity and heat resistance, heat can be evenly dispersed, the situation that movement of an object to be tested and detection of the testing device are affected due to deformation caused by heating expansion or water absorption expansion of the rack is avoided, the circuit board testing precision is guaranteed, and the circuit board testing device is suitable for circuit board testing operation.

The utility model relates to the technical field of urea production lines, and discloses an energy-saving device on a urea production line, which comprises a mixing drum and a support frame, a second motor is mounted at the bottom of the mixing drum, the output end of the second motor is in transmission connection with a transmission disc, and the bottom of a connecting rod is connected to an upper stirring disc below. Flow guide holes are formed in the upper and lower stirring discs. The first motor is mounted in the middle of the top of the mixing barrel, and the upper stirring disc and the lower stirring disc are connected through the connecting rod, so that the upper stirring disc and the lower stirring disc can be driven to rotate after the first motor works, and the conical block is fixed at the top of the solid area of the lower stirring disc; the conical block can improve the flow guide effect on liquid, so that the flowing effect is improved under the design of the flow guide holes of the upper stirring disc and the lower stirring disc, the overall uniform mixing effect is improved, meanwhile, the conical design of the conical block also facilitates the liquid to be converged to the external flow guide holes, and discharging from the discharging cylinder at the bottom position is facilitated.

The built-in ceramic piece comprises a base and a ceramic piece body, the ceramic piece body is arranged at the top of the base, a plurality of binding holes are formed in the bottom end of the interior of the ceramic piece body, a wear-resisting layer is sprayed on the inner surface of the ceramic piece body, and an anti-deformation layer is sprayed on the outer surface of the ceramic piece body. One end of the base is fixedly sleeved with a reinforcing cover, transverse blocks are arranged on the two sides of the reinforcing cover correspondingly, reinforcing blocks are arranged on the tops of the two transverse blocks correspondingly, a wear-resisting layer, an anti-deformation layer, the reinforcing cover, a screw rod, an anti-skid disc and a suction cup are arranged, a plurality of binding holes are used for fixing a wiring harness terminal, and the wear-resisting layer is made of tungsten alloy; tungsten alloy powder is sprayed to the inner surface of the ceramic piece through spraying, the external force resistance strength of the ceramic piece is improved, the two anti-skid discs are sequentially rotated clockwise, the two screw rods are driven to move downwards, the suction cup moves downwards along with the two screw rods, the bottom face of the suction cup is attracted to the smooth installation face, and then the base can be stably installed on the installation face.

This utility model relates to the field of vacuum coating technology and discloses an observation device and a coating system. The observation device includes a housing, an observation unit, and a blocking unit. By setting the housing, the observation unit, and the blocking unit, the service life of the observation structure can be extended. This allows for the replacement of the observation structure or the second light-transmitting element in the observation unit while performing routine maintenance on the component to be connected. This eliminates the need for multiple shutdowns of the component to be connected to replace the observation structure or the second light-transmitting element during the period between start-up and routine maintenance, as is done in related technologies. The observation device of this utility model can increase the working time of the component to be connected, thereby achieving the technical effects of improving the working efficiency of the component to be connected and saving the usage cost of the component to be connected.

The application discloses a kind of high-temperature-resistant organic / inorganic composite silicon aerogel materials and preparation method thereof, high-temperature-resistant organic / inorganic composite silicon aerogel material includes nitrogen heterocyclic crown ether, MXene and organic silicon resin, its preparation process includes by MAX phase preparation MXene, and MXene is modified with nitrogen heterocyclic crown ether, nitrogen heterocyclic crown ether modified MXene is added to organic silicon resin, and high-temperature-resistant organic / inorganic composite silicon aerogel material is obtained.The high-temperature-resistant organic / inorganic composite silicon aerogel material prepared in the application has excellent high-temperature resistance and heat insulation performance, and can be widely used in 5G base station, semiconductor packaging, aerospace, nuclear industry, high-temperature battery, lightweight automobile and other fields, and has wide application prospect.

The invention provides a rabbit-derived plant lactobacillus strain RLP74, a microbial preparation and a feeding probiotic product, and relates to the technical field of microorganisms. The rabbit-derived plant lactobacillus strain RLP74 has strong tolerance to artificial gastric juice and swine bile salt, the survival rate reaches 76% after the rabbit-derived plant lactobacillus strain RLP74 is treated in the artificial gastric juice with the pH value of 2.5 for 3 h, the survival rate reaches 96% after the rabbit-derived plant lactobacillus strain RLP74 is treated in a swine bile salt-containing solution for 4 h, and the survival rate still reaches 68% after the rabbit-derived plant lactobacillus strain RLP74 is continuously digested by the artificial gastric juice for 4.5 h; the bacterial strain has a Caco-2 cell adhesion rate of 33%, has a certain intestinal colonization capability, and has the capability of removing superoxide anion free radicals and bacteriostatic activity on various pathogenic bacteria such as escherichia coli, salmonella, staphylococcus aureus and the like. Therefore, the strain RLP74 or the microbial preparation thereof can be widely applied to preparation of feeding probiotic products for promoting rabbit growth and improving the survival rate of weaned young rabbits, and has good host adaptability and application prospects.

The application provides a non-fluorine-coated diaphragm, a preparation method thereof, and a secondary battery. The non-fluorine-coated diaphragm comprises a base film and a composite coating layer coated on at least one side of the base film. The composite coating layer comprises a first coating layer and a second coating layer, and the first coating layer is arranged between the second coating layer and the base film. The first coating layer comprises first inorganic particles and second inorganic particles. The second coating layer comprises third inorganic particles and polymer particles. The polymer particles are non-fluorine polymers. The lower surface of the polymer particles is tangent to the first coating layer, and the polymer particles are filled in the second coating layer. When the temperature in the battery cell rises, the non-fluorine-coated diaphragm can effectively block the charging and discharging of the battery cell. When the temperature in the battery cell returns to normal, the swelling of the polymer particles decreases, the coverage of the polymer particles in the composite coating layer decreases, and the battery cell can operate normally again. The non-fluorine-coated diaphragm does not deteriorate the internal resistance and cycle performance of the battery cell, and simultaneously improves the heat resistance of the non-fluorine-coated diaphragm at high temperatures.

The invention discloses a polyrotaxane silicone rubber elastomer and a preparation method thereof, and relates to the technical field of high polymer materials. The rubber elastomer is obtained by cross-linking and curing gamma-cyclodextrin / vinyl-terminated polydimethylsiloxane pseudorotaxane (PR) and a hydrogen-containing silicone oil copolymer, and the molar ratio of vinyl in the gamma-cyclodextrin / vinyl-terminated polydimethylsiloxane pseudorotaxane to silicon hydrogen in the hydrogen-containing silicone oil copolymer is (1: 10)-(1: 2). The proportion of a methylhydrosiloxane block in the hydrogen-containing silicone oil copolymer is not higher than 30% in percentage by mass. The invention also provides a preparation method and application of the rubber elastomer. The polyrotaxane silicone rubber elastomer provided by the invention is excellent in performance, the elongation at break can be higher than 400%, and the tensile strength can be higher than 0.6 MPa.

This invention belongs to the technical field of industrial magnesium alloy materials, specifically a heat-resistant magnesium alloy with high strength, toughness, high conductivity, and brazability, and its preparation method. By mass percentage, the magnesium alloy comprises: Zn 5.0%–8.0%, Mn 0.5%–1.5%, Cu 0.5%–3.5%, Ag 0.05%–3.5%, Ca 0.01%–1.5%, with the balance being Mg. The magnesium alloy material prepared by the method combined with specific processes has a tensile strength ≥360MPa, elongation ≥10%, conductivity ≥19MS / m, tensile strength ≥200MPa at 200℃, and a tensile strength decrease of ≤10% after brazing at 350–450℃. Furthermore, it can be brazed into complex cavity components integrating load-bearing and conductive functions, enabling service in high-temperature environments up to 200℃. It has significant application value in electronic signal and microwave signal transmission components in aerospace, aviation, transportation, and weaponry fields.

The invention relates to the technical field of polypropylene films, and proposes a heat-resistant biaxially oriented polypropylene film and a preparation method thereof. A heat-resistant biaxially oriented polypropylene film comprises a base layer and a surface layer arranged on the base layer, wherein the raw materials of the base layer comprise the following components in parts by weight: 100 parts of polypropylene resin, 10-20 parts of filler, 0.5-1 part of antioxidant, 1-2 parts of antistatic agent, 2-4 parts of lubricant, and the filler is a modifier-modified mica powder, wherein the modifier of the modifier-modified mica powder comprises a compound containing a carboxyl group and a benzene ring and / or palm wax. Through the above technical scheme, the problem of poor heat resistance of the biaxially oriented polypropylene film in the related art is solved.