317 results about "Paraffin oils" patented technology

The invention relates to a paraffin type thermostat. The paraffin type thermostat comprises a main valve 1, a cover and seal gasket assembly 2, an upper support 3, a rubber pipe 4, a valve seat 5, a vent hole 6, a lower support 7, paraffin 8, an inductor 9, a bypass valve 10, a central rod 11 and a spring 12. The upper support, the lower support and the valve seat of the thermostat are riveted into a whole. The upper end of the central rod is fixed to the center of the upper support. The lower portion of the central rod is inserted into a central hole of the rubber pipe. The lower end of the central rod is conical. A cavity between the rubber pipe and a shell of the inductor contains the paraffin. The upper portion and the lower portion of the shell of the inductor are provided with the main valve and the bypass valve which are in linkage. The vent hole is formed in the main valve. The paraffin type thermostat is high in heat conductivity and guarantees that an engine cannot be excessively cold.

The invention discloses an energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt and a manufacturing method thereof. The energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt comprises a polyarylate fabric whole belt core, a covering layer and a belt core dipping sizing material, the covering layer comprises the following components: solution polymerized styrene-butadiene rubber, a styrene-butadiene-styrene block copolymer, a thermoplastic polyurethane elastomer, zinc oxide, stearic acid, sulfur, an accelerant, an anti-aging agent, carbon black, a hybrid flame-retardant composite material, a phosphate flame retardant, paraffin oil and an antistatic agent; the covering layer of the energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt prepared by the invention is compounded from white carbon black, expanded graphite, diethyl aluminum hypophosphite and dimethyl imidazole zinc, and is subjected to surface treatment through polyacrylamide; and then the styrene-butadiene-styrene block copolymer is used for carrying out macromolecular modification on the hybrid flame-retardant composite material, so that the prepared conveyor belt has excellent flame-retardant and antistatic properties, environment-friendly properties, low rolling resistance and mechanical properties.

The invention belongs to the technical field of sealing materials and synthetic rubber, and particularly discloses a high and low temperature resistant, wear resistant and fatigue resistant ethylene propylene rubber material and a preparation method thereof. According to the invention, the ethylene propylene rubber with low ethylene content and high Mooney viscosity is used as a base material, and the flexing resistance of a rubber system is improved by adding the small-particle-size high-wear-resistance carbon black, the high-structure-degree fast extruding carbon black, the compounded semi-reinforcing carbon black and the white carbon black as reinforcing filling materials. The low temperature resistance of the rubber is improved by adding a composite plasticizer (paraffin oil is compounded with a small amount of fatty acid ester plasticizer). Meanwhile, peroxide is selected, and a small amount of sulfur is used as a vulcanization system, so that the flexing resistance can be considered while the high-temperature resistance is ensured. And finally, the anti-aging agent is supplemented to enhance the protection effect on aging caused by heat and oxygen, so that the heat resistance and fatigue resistance of the rubber material are integrally improved. The rubber material provided by the invention can be prepared by adopting a universal mixing process in the rubber industry, and is simple in process and convenient to operate.

The invention relates to the technical field of rubber compounds, and particularly discloses a bio-based and circulating material synergistically modified EPDM rubber compound and a preparation method thereof. The invention discloses a bio-based and circulating material synergistically modified EPDM rubber compound. The rubber compound is prepared from the following components: 100 parts of bio-based EPDM rubber, 100 to 130 parts of a reinforcing agent, 40 to 60 parts of paraffin oil, 5 to 7 parts of magnesium oxide, 0.5 to 1.5 parts of stearic acid, 6 to 8 parts of BIPB-40 peroxide, 2 to 5 parts of a Si-69 silane coupling agent, 1 to 3 parts of a dispersing agent and 1 to 3 parts of an assistant crosslinking agent, the reinforcing agent is composed of fast extruding furnace black N550, rice hull ash white carbon black and thermal cracking carbon black; and the assistant cross-linking agent is prepared from diallyl terephthalate and triallyl isocyanurate. The rubber compound prepared by utilizing the technical scheme provided by the invention can meet and maintain the mechanical property requirements, and meanwhile, carbon emission of the product in the whole life cycle is reduced from the aspects of formula and process.

The invention relates to the field of automobile part manufacturing, and particularly discloses a barrier layer direct bonding type TPE material for an automobile air conditioner pipeline system and a preparation method and application of the barrier layer direct bonding type TPE material. The TPE material is prepared from the following raw materials: a thermoplastic elastomer TPE, PA, EVOH, polyether block amide, a glycidyl methacrylate grafted olefin copolymer elastomer, a toughening compatilizer, composite modified montmorillonite, a cold-resistant additive, an antioxidant and paraffin oil. Wherein the composite silane coupling agent, lauric acid and N, N '-carbonyldiimidazole are adopted to modify the nano-montmorillonite, so that the dispersity of nano-montmorillonite particles is improved, the formation of aggregates is effectively reduced, and the mechanical property of the material is enhanced; the polyether block amide, the glycidyl methacrylate grafted olefin copolymer elastomer and the toughening compatilizer have a synergistic effect, so that good adhesiveness of the TPE material and the barrier layer is realized.

The environment-friendly cable ethylene-propylene insulation material comprises the following raw materials: ethylene propylene diene monomer, an elastomer, a reinforcing agent, a flame retardant, a vulcanizing activator, a filler, a plasticizer, an anti-aging agent, a vulcanizing agent and a silane coupling agent. 50-70 parts by mass of ethylene propylene diene monomer rubber; the elastomer is a POE (polyolefin elastomer) of 30-50 parts; the flame retardant is prepared from 30 to 50 parts of nano magnesium hydroxide, 5 to 10 parts of microencapsulated red phosphorus and 3 to 5 parts of zinc borate; and the plasticizer is paraffin oil. According to the ethylene-propylene insulating material, a halogen-free flame-retardant system is combined with an interface modification technology, so that the defects of poor mechanical property and high material toxicity of a traditional material are overcome. The oxygen index is greater than or equal to 38%, the tensile strength is greater than or equal to 10Mpa, and the material is suitable for high-risk mine environments.

The invention discloses a cleaning lubricant for textile machinery. The cleaning lubricant comprises the following components in percentage by weight: 6-14% of petroleum ether, 16-26% of solvent oil, 6-14% of alkane oil, 16-26% of 120 # solvent oil, 31-39% of butane gas and 1-9% of dimethyl silicone oil. The invention belongs to the technical field of textile, and particularly relates to a cleaning lubricant for textile machinery, which can clean greasy dirt and dirt on each movable part of a textile mill, a blowing workshop, a drawing workshop, a roving workshop and a spinning workshop. The cleaning lubricant has the technical effects of rust removal, lubrication, rust prevention, wear resistance and non-sticking to all movable parts during cleaning, and the lubricating period of the cleaning lubricant is long.

The invention relates to a waterproof sealing gasket material for a shield tunnel and a preparation method of the waterproof sealing gasket material. The preparation method comprises the following steps: plastifying raw rubber to obtain plastified raw rubber; the preparation method comprises the following steps: stirring and mixing plasticated raw rubber, carbon black N550, calcium carbonate, paraffin oil, zinc oxide, stearic acid, calcium oxide, an anti-aging agent and an organic magnesium compound, mixing in a mixing mill, and cooling to room temperature to obtain a mixture I; stirring and mixing the mixture I, modified NPE particles and an accelerant, mixing, and cooling to room temperature to obtain a mixture II; uniformly mixing the mixture II and sulfur in a mixing mill, vulcanizing at high temperature, and standing at room temperature for 24 hours to obtain the waterproof sealing gasket material. According to the waterproof sealing gasket material, the modified NPE particles of the core-shell structure are added, the compatibility of a water-swelling material and non-polar rubber is improved, the organic magnesium compound is added as a multifunctional auxiliary agent, the interface bonding, vulcanization network and flame retardant performance are synergistically improved, and the waterproof sealing gasket material has good waterproof performance. The prepared sealing gasket material has excellent mechanical properties, heat aging resistance, compression set resistance and flame retardance.

The invention discloses an energy-absorbing and shock-reducing rubber material for an ocean platform and a preparation method of the energy-absorbing and shock-reducing rubber material. The rubber material is prepared from the following raw material components: a rubber matrix, a reinforcing filler, a vulcanizing aid, a vulcanizing agent, a silane coupling agent, a vulcanizing activator, an anti-aging agent, protective wax, tear-resistant resin and paraffin oil, the preparation method comprises the following steps: plastifying, preparing master batch, preparing final mixed rubber, and vulcanizing and molding. The natural rubber and butadiene styrene rubber blend is used as a matrix, the natural rubber endows the material with high elasticity, and the butadiene styrene rubber is used for improving the aging resistance of the material; the carbon black and the fumed silica are used as reinforcing fillers, and the dispersion state of the fumed silica is optimized through the silane coupling agent, so that the mechanical properties of the energy-absorbing and shock-reducing rubber material are effectively enhanced. The prepared energy-absorbing and shock-reducing rubber material for the ocean platform can effectively overcome the defects of natural rubber in the aspects of aging resistance, seawater corrosion resistance, oil resistance and chemical corrosion resistance, and meanwhile, the excellent high-damping characteristic and fatigue resistance of the natural rubber are reserved.

The invention discloses rosin type soldering flux for indium-based low-temperature soldering paste and a preparation method of the rosin type soldering flux, and belongs to the technical field of brazing soldering flux. The soldering flux is prepared from the following components in percentage by weight: 40 to 60 percent of modified rosin, 2 to 5 percent of an organic acid activating agent, 0.5 to 2 percent of a halogen-containing compound, 2 to 5 percent of hydrogenated castor oil, 0.1 to 1 percent of benzotriazole, 0.1 to 1 percent of triethanolamine, 0.5 to 2 percent of a surfactant and 0.5 to 2 percent of paraffin oil. And the balance of an organic solvent. The method has the advantages that the prepared soldering flux is good in wettability and excellent in weldability, welding spots are bright and full, the welding void rate is as low as 2.4%, the heat conductivity can reach 43.12 W / mK, the welding spot shear strength can reach 13.45 MPa, and the soldering flux is suitable for low-temperature welding of indium-based brazing filler metal.

The invention relates to the field of EPDM (Ethylene-Propylene-Diene Monomer) rubber, and particularly discloses a high and low temperature resistant EPDM rubber compound and a preparation method thereof. The high and low temperature resistant ethylene-propylene-diene monomer rubber compound comprises the following raw material components in parts by weight: 100 parts of ethylene-propylene-diene monomer; 20 to 25 parts of compound gutta-percha; 40 to 45 parts of carbon black; 20 to 25 parts of white carbon black; 5 to 10 parts of paraffin oil; 2-3 parts of zinc oxide; 1-2 parts of stearic acid; 1.5 to 2.5 parts of peroxide; 2 to 2.5 parts of a crosslinking auxiliary agent; 2-3 parts of an anti-aging agent; 1 part of sulfur; and 2-3 parts of an accelerant. The ethylene-propylene-diene monomer rubber compound can still keep good rebound resilience and mechanical performance at-20 DEG C or below, the mass change rate of the ethylene-propylene-diene monomer rubber compound subjected to heat treatment at 150 DEG C for 96 h does not exceed 1.4 wt%, the stable performance in a high-temperature environment is ensured, the low-temperature characteristic T10 rigid modulus of the ethylene-propylene-diene monomer rubber compound reaches-50 DEG C or even lower, and the application range is wide.

The present invention relates to the technical field of polymer materials, and specifically to a tungsten-containing lead-free radiation-proof rubber glove and a preparation method thereof. The present invention overcomes the disadvantages of poor radiation-proof ability and poor anti-permeability performance. After the modified ethylene propylene diene monomer rubber is plastified, an activator and an antioxidant are added for the first stage of internal mixing, then carbon black, a composite reinforcing agent, a radiation shielding powder, and a dispersant are added for the second stage of internal mixing, and finally paraffin oil is added for the third stage of internal mixing to obtain a crude mixed rubber; the crude mixed rubber, the radiation shielding powder, the dispersant, a vulcanizing agent, and a vulcanization aid are mixed and open-milled to obtain a rubber sheet; after the rubber sheet is parked, filtered, injection molded, second-stage vulcanized, cleaned, and dried, a tungsten-containing lead-free radiation-proof rubber glove is obtained. The tungsten-containing lead-free radiation-proof rubber glove prepared by the present invention has strong radiation-proof performance and strong anti-permeability performance, and is suitable for the protection of complex radiation environments.

The invention relates to the technical field of high polymer materials, in particular to tungsten-containing lead-free anti-radiation rubber gloves and a preparation method thereof. The anti-radiation fabric overcomes the defects of poor anti-radiation capability and poor anti-permeation performance. The preparation method comprises the following steps: plastifying modified ethylene propylene diene monomer rubber, adding an active agent and an anti-aging agent, carrying out first-time internal mixing, adding carbon black, a composite reinforcing agent, radiation shielding powder and a dispersant, carrying out second-time internal mixing, and finally adding paraffin oil, and carrying out third-time internal mixing to obtain a crude rubber compound; mixing the crude rubber compound, radiation shielding powder, a dispersing agent, a vulcanizing agent and a vulcanizing aid, and performing open milling to obtain a rubber sheet; and the tungsten-containing lead-free anti-radiation rubber gloves are obtained after the rubber sheets are subjected to standing, filtering, injection molding, two-stage vulcanization, cleaning and drying. The tungsten-containing lead-free anti-radiation rubber glove prepared by the invention has strong anti-radiation performance and strong anti-permeation performance, and is suitable for protection in a complex radiation environment.

The invention discloses a semiconductive ethylene propylene diene monomer and a preparation method and application thereof. The semiconductive ethylene-propylene-diene monomer is prepared from the following raw materials: ethylene-propylene-diene monomer, zinc oxide, an anti-aging agent, paraffin oil, liquid ethylene-propylene-diene monomer, superconductive carbon black, reinforcing carbon black, a vulcanizing agent and a vulcanizing aid. Wherein the ethylene content of the liquid ethylene-propylene rubber is 60-75wt%, and the molecular weight of the liquid ethylene-propylene rubber is 5000-40000. The semi-conductive ethylene propylene diene monomer adopts a peroxide-vulcanization mixed system, and the semi-conductive ethylene propylene diene monomer prepared by adopting the formula has the advantages of low volume resistivity (less than or equal to 15 omega.cm), high tear strength (greater than or equal to 35 MPa), high tensile strength (greater than or equal to 13 MPa), high bonding strength (greater than or equal to 7 MPa), low rubber content, no color flooding in product appearance and the like; the method can be used for preparing semiconductive materials in the high-voltage and ultrahigh-voltage direct current field.

The invention discloses a high and low temperature resistant ethylene propylene rubber base material and a preparation method thereof. The high and low temperature resistant ethylene propylene rubber base material comprises the following raw material components in parts by weight: 50-80 parts of ethylene propylene diene monomer, 40-60 parts of silicone rubber, 10-30 parts of a compatibilizer, 1-5 parts of zinc oxide, 1-3 parts of stearic acid, 10-30 parts of carbon black, 8-12 parts of paraffin oil, 1-2 parts of an anti-aging agent, 0.5-2 parts of a coupling agent, 1-5 parts of a vulcanizing agent, 1-4 parts of an accelerant and 2-5 parts of a reinforcing agent. The ethylene propylene rubber base material is prepared by mixing the raw materials and carrying out plastication, thin-passing, batch-off standing and vulcanization operation process steps, the prepared ethylene propylene rubber base material has excellent mechanical properties, aging resistance and high and low temperature resistance, and the preparation method is simple in process, easy to operate and suitable for industrial production. And the production cost can be reduced.

The invention belongs to the field of polytetrafluoroethylene microporous membranes, and particularly relates to a polytetrafluoroethylene microporous membrane with a high interception rate and a preparation method thereof. The polytetrafluoroethylene microporous membrane is prepared from the following raw materials in parts by weight: 40 to 50 parts of polytetrafluoroethylene resin powder, 1 to 10 parts of paraffin oil, 1 to 5 parts of alkyl acrylate, 1 to 5 parts of ethylene oxide acrylic resin and 5 to 10 parts of polyalkenyl succinimide. Alkyl acrylate and ethylene oxide acrylic resin can improve wear resistance and corrosion resistance; the high temperature resistance, chemical corrosion resistance and low-temperature flexibility can be improved, the size and distribution of pores are controlled by adjusting the stretching ratio, and the interception rate is improved on the premise that permeability is guaranteed.

The invention belongs to the field of porous membranes, particularly relates to a selective permeable porous membrane and a preparation method thereof, and provides the following scheme aiming at the problem that an existing selective permeable porous membrane is poor in selective permeability. The polytetrafluoroethylene composite material comprises the following raw materials in parts by weight: 50-100 parts of polytetrafluoroethylene resin, 1-10 parts of paraffin oil, 0.5-1 part of a plasticizer, 0.5-1 part of an antioxidant, 0.5-1 part of an ultraviolet light absorber, 0.5-1 part of a pore-foaming agent and 0.5-1 part of a modifier. Comprising the following steps that S1, raw materials are mixed, specifically, polytetrafluoroethylene resin, paraffin oil, a plasticizer, an antioxidant, an ultraviolet light absorber, a pore-foaming agent and a modifying agent are evenly mixed, and through use of the plasticizer, the antioxidant and the ultraviolet light absorber, the performance of the film can be improved; the porosity of the membrane can be increased by adding the pore-foaming agent, so that the pore diameter is increased, and the selective permeability of the membrane is improved.

The invention discloses a halogen-free flame-retardant thermoplastic vulcanized elastomer and a preparation method thereof, and belongs to the technical field of thermoplastic vulcanized elastomer materials. The preparation method comprises the following steps: epoxidizing ethylene propylene diene monomer by using an oxygen source to obtain epoxy ethylene propylene diene monomer, and carrying out blending vulcanization reaction on the epoxy ethylene propylene diene monomer, polypropylene, paraffin oil, a modified intumescent flame retardant synergist, a charring agent, organic peroxide, an assistant crosslinker, a flame retardant, a dispersing agent and an antioxidant in a reaction type double-screw extruder, the halogen-free flame-retardant thermoplastic vulcanized elastomer disclosed by the invention is good in flame retardant property, and the mechanical property and the aging property of the halogen-free flame-retardant thermoplastic vulcanized elastomer are remarkably improved.

The invention relates to the field of sealing strips, in particular to an ethylene propylene diene monomer sealing strip and a preparation method thereof. Comprising the following components in parts by weight: 150-180 parts of ethylene propylene diene monomer, 60-90 parts of carbon black, 8-12 parts of white carbon black, 3-8 parts of a peroxide vulcanizing agent, 6-12 parts of zinc oxide, 12-16 parts of magnesium oxide, 10-18 parts of paraffin oil, 1-3 parts of an accelerant, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent and 1-3 parts of a coupling agent. According to the invention, a C-C cross-linked bond is generated through the synergistic effect between the carbon black and the white carbon black activated by the coupling agent and the free radical reaction of the peroxide vulcanizing agent, so that a high-density and uniform cross-linked network is formed, and the tensile strength of the ethylene propylene diene monomer sealing strip is effectively improved.

The utility model relates to the technical field of labels, in particular to a label capable of avoiding color fading due to reaction with a plasticizer, a surface layer is separated from an object to be pasted by a zigzag support strip and a rectangular support strip, the distance between the surface layer and the object to be pasted is increased, and the possibility that information of the label reacts with the precipitated plasticizer is prevented. The content of the label is protected from fading due to erosion of the plasticizer; if the preservative film wraps the object with the label, the surface layer of the label is in direct contact with the preservative film, the third protection layer plays a first isolation role on the plasticizer in the preservative film, part of the free plasticizer penetrates through the third protection layer and then enters the second protection layer, and the second protection layer is made of paraffin oil. The thick paraffin oil absorbs and isolates most of the plasticizer, the free plasticizer is further reduced, a very small part of the plasticizer penetrates through the paraffin oil and then reaches the first protection layer to be blocked again, the plasticizer penetrating through the first protection layer is very small, the corrosion effect on the label is very small, and the label cannot fade due to the effect of the plasticizer.

The invention discloses a corrosion-resistant EPDM (Ethylene-Propylene-Diene Monomer) sealing strip applied to a packaging barrel and a preparation method thereof, and relates to the field of rubber products. The invention discloses a corrosion-resistant EPDM sealing strip applied to a packaging barrel. The sealing strip comprises the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer; 40 to 45 parts of fumed silica; 76-82 parts of calcined kaolin; 7-14 parts of titanium dioxide; 18 to 23 parts of paraffin oil; 2-5 parts of a coupling agent Si69; 1-2 parts of stearic acid; 5-8 parts of zinc oxide; 4-7 parts of polyethylene glycol; 1-3 parts of an internal release agent; 8-13 parts of a vulcanization accelerator; and 10-13 parts of a defoaming agent calcium oxide. According to the technical scheme, the EPDM sealing strip has good high-temperature sealing performance and corrosion resistance.

The invention relates to a fully-hydrophobic ultrahigh-loading MOF (Metal Organic Framework) mixed matrix membrane as well as a preparation method and application thereof, and belongs to the technical field of membrane separation. The preparation method comprises the following steps: heating and melting a large-size hydrophobic MOF material, a high-molecular polymer and paraffin oil, molding through a high-temperature roller-to-roller hot pressing process to prepare a membrane material with the loading capacity of 92% or above and a multi-stage rough surface, and finally carrying out hydrophobic and oleophobic performance treatment through fluorosilane. The obtained mixed matrix membrane material has high flux and excellent anti-pollution and anti-infiltration capabilities, and is suitable for efficient desalination of complex wastewater.

The invention discloses a corrosion-resistant water-stop belt and a preparation method thereof, and relates to the technical field of high-molecular compound composition water-stop belts. The corrosion-resistant water-stop belt is prepared from the following raw materials in parts by mass: 50-70 parts of ethylene propylene diene monomer, 20-40 parts of chloroprene rubber, 3-8 parts of zinc oxide, 1-3 parts of stearic acid, 1-2 parts of an anti-aging agent, 5-15 parts of paraffin oil, 20-40 parts of white carbon black, 30-50 parts of calcium carbonate, 1.5-3 parts of sulfur and 0.5-1.5 parts of an accelerant. The accelerant accurately regulates and controls the sulfur cross-linking process to form a high-density and uniform sulfur bond network structure, so that the material can still maintain excellent mechanical properties such as tensile strength and elongation at break in a corrosion environment, and sealing failure caused by swelling or aging is avoided.

The invention belongs to the technical field of TPV materials, and particularly relates to an anti-ultraviolet halogen-free flame-retardant TPV material and a preparation method thereof. The TPV material comprises the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 10-30 parts of an ethylene-vinyl acetate copolymer, 20-30 parts of polypropylene, 50-100 parts of paraffin oil, 1-5 parts of an antioxidant, 1-3 parts of a cross-linking agent, 1-5 parts of a lubricant and 10-20 parts of functional phosphate. According to the invention, a phosphate structure with a flame-retardant effect and a benzimidazole structure with an ultraviolet absorption function are introduced into the same molecule to realize multi-functionalization of the modifier, so that the prepared TPV material has excellent flame-retardant and anti-ultraviolet properties.

The present invention relates to the technical field of forging lubricants, and discloses a high-stable and environmentally friendly forging lubricant for aluminum alloy wheels. The present invention also discloses a preparation method of the above-mentioned high-stable and environmentally friendly forging lubricant for aluminum alloy wheels, including: mixing and grinding gallium oxide, cerium oxide, and calcium fluoride uniformly, heating to 600-800°C under nitrogen protection, keeping warm for 10-30min, heating to 1000-1100°C, passing a mixed gas of argon and oxygen, keeping warm for 1-2h, cooling to room temperature with the furnace to obtain a doped nano material; mixing white oil and paraffin oil uniformly, adding an emulsifier thereto and mixing uniformly, adding an oiliness agent, a doped nano material, and nano graphene and stirring to obtain a premix; adding an antioxidant, sodium fluoride, aluminum naphthenate, and a dispersant to water and stirring uniformly, adding the premix thereto under stirring, ultrasonically dispersing, and homogenizing at 40-45MPa high pressure for 10-30s.

The invention discloses a method for microfluidic high-throughput screening of AKK bacteria. The method comprises the following steps: 1) preparing a microfluidic chip; 2) collecting fresh excrement of healthy volunteers, diluting, and adding a fluorescence labeled antibody to obtain a dispersion phase; and (3) preparing liquid drops by taking paraffin oil and Span-80 as a mobile phase, enabling the liquid drops to enter a liquid drop culture tank through an S-shaped liquid drop circulation channel, culturing, introducing the mobile phase, introducing the liquid drops in the liquid drop culture tank into a liquid drop collection tank, taking out, detecting a fluorescence signal, culturing the liquid drops with the fluorescence signal on the improved brain heart infusion broth solid culture medium, and obtaining the brain heart infusion broth. Obtaining a to-be-identified strain; 4, the strain to be identified serves as a template, PCR amplification is conducted, sequencing is conducted on an amplification product, BLAST sequence comparison is conducted on a sequencing result on an NCBI website, and the target strain AKK bacterium is screened out. The method has the advantages of being high in throughput, simple in experimental process and high in specificity, and the screening efficiency of the AKK bacterium can be improved.

The invention relates to the technical field of rubber, and provides a high-strength rubber transmission belt as well as a preparation method and application thereof. The high-strength rubber transmission belt is prepared from the following raw materials in parts by weight: 90 to 110 parts of ethylene propylene diene monomer, 6 to 10 parts of aramid fiber, 3 to 9 parts of nylon, 40 to 50 parts of filler, 4 to 6 parts of vulcanizing activator, 5 to 9 parts of paraffin oil, 4 to 7 parts of adhesive, 3 to 4 parts of anti-aging agent, 11 to 15 parts of auxiliary vulcanizing agent, 2 to 4 parts of vulcanizing agent and 0.1 to 0.5 part of scorch retarder. The filler is prepared from the following raw materials in parts by weight: 100 parts of carbon black, 5 to 7 parts of 4-maleimidobenzoic acid and 5 to 7 parts of 2, 2-dimethylolpropionic acid. Through the technical scheme, the problem of insufficient strength of the rubber transmission belt in the related technology is solved.

A preparation method for a urea-formaldehyde microcapsule, comprising: uniformly mixing an emulsifier, urea, ammonium chloride, resorcinol and deionized water, adjusting the pH value, defoaming, adding dicyclopentadiene to form an emulsion, after stabilization, adding a formaldehyde solution and paraffin oil, covering and heating the emulsion for polymerization, and cooling and washing to obtain a urea-formaldehyde microcapsule.

The application discloses a soft capsule pill press rubber forming and conveying system, which comprises a syringe and two sets of spreading boxes, rubber drum wheels and air coolers symmetrically arranged on the upper sides of the syringe, wherein flowing glue is coated on the rotating rubber drum wheel through the spreading box and forms the rubber extending to the syringe downward through the air cooler under the driving of the rubber drum wheel. The application improves and rearranges the spreading box, rubber drum wheel and air cooler in the old pill press, establishes a new rubber forming and conveying system, removes the multiple transmission felt wheels needed for the upward transmission of the rubber, makes the glue in the spreading box flow into the cooling channel of the air cooler from high to low, and forms the rubber directly entering the rotating die of the pressing die in the cooling channel, thereby reducing the use amount of paraffin oil.

This invention discloses a thermoplastic elastomer composition, its preparation method, and its applications. The thermoplastic elastomer composition of this invention comprises the following components: PP resin I, SEBS, TPV, glass fiber powder, paraffin oil, antioxidant, and light stabilizer; wherein, the PP resin I conforms to ISO 1133-1-2011 standard, with a melt index of 80–130 g / 10 min at 230°C and 2.16 kg; the SEBS has a weight-average molecular weight of 80,000–160,000; and the TPV comprises PP resin II and EPDM. The thermoplastic elastomer composition of this invention combines PP resin with a specific melt index, SEBS with a specific weight-average molecular weight, and TPV, resulting in a thermoplastic elastomer composition that possesses both high fluidity and low gloss, as well as excellent high-temperature resistance.