36results about How to "High melting temperature" patented technology

The invention relates to the field of material science, and discloses a preparation process of a softwood rubber metal composite material, which comprises the following steps: S1, cleaning the surfaces of metal, softwood and rubber; s2, plasma treatment is conducted on the surfaces of the metal, the cork and the rubber; s3, preparing a modified chemical coupling agent, and coating the modified chemical coupling agent on the surfaces of metal, cork and rubber; s4, hot press molding is carried out, and metal, rubber and cork are stacked and subjected to hot press treatment; and S5, cooling treatment is conducted, and the cork rubber metal composite material is obtained. The modified chemical coupling agent is prepared from the following components in percentage by weight: 70 to 80 percent of 3-methyl propyl triethoxy silane; 10 to 20 weight percent of diisocyanate-based silicone oil; 5 to 10 wt% of polyethylene glycol; and 2-5 wt% of dimethyl diallyl ammonium chloride. The interface bonding strength of the softwood rubber metal composite material is remarkably improved, and the overall mechanical performance is enhanced.

The preparation method comprises the following steps: adding polytetrahydrofuran ether glycol, polycaprolactone glycol, isocyanate and dibutyltin dilaurate into a flask, respectively inserting a thermometer, a glass plug, a stirring paddle and a nitrogen tube into a flask opening, heating to 80-85 DEG C, reacting for 1-2 hours, adding a charring agent into the flask, reacting for 1.5-2.5 hours, and cooling to room temperature to obtain the flame-retardant washable melt-drop-resistant polyurethane coating. A polyurethane prepolymer is obtained; cooling the polyurethane prepolymer to 45-55 DEG C, adding 2, 2-dimethylolpropionic acid, reacting for 1-2 hours, adding the porous carbon layer modifier and the glucose modifier, reacting for 1-2 hours at 65-70 DEG C, adding triethylamine, and reacting for 1-2 hours; and cooling to normal temperature, adding water, stirring and reacting for 1-2 hours, and adjusting the pH value of the system to 7-8 to obtain the flame-retardant washable melt-drop-resistant water-based polyurethane coating which has good flame-retardant, washable and melt-drop-resistant properties and the like.

The present invention discloses a preparation method and application of Kappa-carrageenan flexible conductive organic gel suitable for ultra-wide temperature range. The present invention adds 18-crown ether-6 with good solubility to glycerol or a glycerol-based mixture to solubilize potassium salt, and selects Kappa-carrageenan as a gel matrix, and dissolves the above components by heating, and a stable Kappa-carrageenan flexible conductive organic gel can be obtained after cooling. The organic gel prepared by the present invention still maintains good flexibility after being refrigerated for 24 hours under an environment of 80°C, and can be stably present for a long time in a high temperature environment of up to 80°C, while having better mechanical and conductive properties. The preparation method of the present invention is simple, efficient, and low-cost, and can have a relatively broad application prospect in extremely harsh environments and flexible electronic devices.

The invention relates to the field of medical elastomers, and discloses a high-weather-resistance medical elastomer and a preparation method thereof.The medical elastomer is prepared from, by weight, 65-75 parts of polypropylene, 8-12 parts of SEBS, 18-22 parts of nitrile rubber, 1-3 parts of lubricant, 0.5-1.5 parts of antioxidant and 5-15 parts of organic silicon microspheres; the preparation method of the organic silicon microspheres comprises the following steps: in inert gas, carrying out polymerization reaction on 15-25 parts by weight of organic silicon monomer, 5-15 parts by weight of styrene and 0.3-0.5 part by weight of double-end vinyl polydimethylsiloxane under the action of 0.007-0.013 part by weight of initiator for 3-4 hours, then adding 0.4-0.6 part by weight of cross-linking agent, continuously stirring and reacting to obtain a mixed solution, filtering, cleaning and drying the precipitate, thereby obtaining the organic silicon microspheres. The organic silicon microspheres are obtained; the method has the advantage of improving the low-temperature resistance of the medical polypropylene elastomer.

The invention relates to the technical field of solid waste thermochemical treatment, and provides a method for treating waste incineration fly ash through plasma melting. Fly ash is pretreated and then enters a plasma furnace to generate a solid melt, the solid melt is quenched into vitreous slag through a slag cooler, and high-temperature waste gas generated by the melting furnace enters a high-temperature waste gas pretreatment and gas treatment system to be purified into gas meeting the environmental protection standard. An active carrier of organic particles prepared from silicon resin and silicon dioxide is added into the fly ash, so that dioxin molecules and heavy metals in the fly ash are respectively and firmly wrapped by a three-dimensional network, and the harmless reduction treatment problem of dioxin and cured heavy metals is solved; meanwhile, the problems that when plasma equipment treats the waste incineration fly ash, the melting glass transition temperature is too high, and the fly ash diffuses along with tail gas in the feeding process, so that a pipeline is blocked are solved.

The invention discloses a vacuum suspension smelting method of a refractory metal high-entropy alloy, which is characterized by comprising the following steps of: 1, adding a small amount of one, two or more components with the lowest melting point into one, two or more components with the highest melting point in the high-entropy alloy to form a primary intermediate alloy with a lower melting point; 2, adding one, two or more components with lower melting points into the primary intermediate alloy to obtain a secondary intermediate alloy with a further lower melting point; thirdly, intermediate alloys with the melting points reduced in sequence are formed in sequence in the same manner; and fourthly, the last intermediate alloy and the remaining metal are mixed and smelted, and the refractory metal high-entropy alloy with the components meeting the requirements is obtained. According to the process, the refractory metal high-entropy alloy is smelted through the technology that the intermediate alloy with the gradually-reduced melting point is smelted step by step, and the technical difficulty brought to the smelting process by the contradiction that the superheat degree of suspension smelting is small and the melting point difference of components of the alloy is large is effectively solved.

The invention discloses a pyrolytic porous graphite coating for SiC crystal surface and a preparation method thereof, belonging to the technical field of carbon material preparation, and the preparation method comprises the following steps: mixing cleaned silicon carbide crystal, nickel salt and composite precursor, carbonizing at high temperature to obtain modified SiC crystal; placing the modified SiC crystal in a pyrolysis furnace, introducing methane and argon, performing pyrolysis deposition reaction, cooling to obtain pyrolyzed modified SiC crystal; polishing, grinding and cleaning the pyrolyzed modified SiC crystal to obtain a pyrolytic porous graphite coating. The metal carbide nickel carbide formed by nano-iron-nickel particles has a high melting temperature, and forms a uniform and orderly step-like structure with a height of about nanometers on the surface of the silicon carbide crystal, showing good roughness; the mesh carbon layer acts as a buffer layer, plays a transition role between the silicon carbide substrate and the surface pyrolytic porous graphite, and improves the lattice matching between the pyrolytic porous graphite and the silicon carbide crystal.

The invention discloses a high-strength anti-steam oxidation coating material and a coating, a preparation method and application thereof, and belongs to the technical field of corrosion prevention of inner walls of through-flow components of thermal power generating units. The high-strength steam oxidation-resistant coating material disclosed by the invention is composed of the solid-phase component and the liquid-phase component, and all the components play a synergistic role, so that the steam oxidation resistance of a coating is improved, and meanwhile, the mechanical property of the coating is enhanced, so that the coating is prevented from cracking in the service process, and the service life of the coating is prolonged. The problem that an existing coating cracks in a high-temperature environment is solved.

The invention discloses a preparation method of a large-deformation auxiliary high-homogeneity aluminum-silicon intermediate alloy. The method comprises the following steps: 1, mixing aluminum powder and silicon powder to obtain aluminum-silicon mixed powder; 2, performing cold isostatic pressing on the aluminum-silicon mixed powder; 3, vacuum sintering; 4, removing oxide skin on the surface; 5, carrying out plastic deformation at ultralow temperature after sheathing; and sixthly, homogenizing treatment is conducted, and the high-homogeneity aluminum-silicon intermediate alloy is obtained. According to the method, the powder metallurgy method is combined with ultralow-temperature extrusion severe plastic deformation, intermediate alloy densification and primary silicon crushing and homogenization are achieved under three-way pressure stress, the aluminum-silicon intermediate alloy high in density, refined in grain and high in homogeneity is obtained, and the aluminum-silicon intermediate alloy has the advantages of being high in purity and homogeneity, low in impurity element content and good in mechanical property. The method is suitable for adding materials in the preparation process of aluminum-silicon alloy and titanium alloy.

The invention provides a preparation method of a TiAl-based alloy casting which takes a TiAl intermetallic compound as a matrix and is added with multi-component alloy elements. The preparation method comprises the following steps: S1, carrying out suspension smelting on Ti and Al to form a TiAl alloy matrix; s2, alloy elements are subjected to suspension smelting to form an alloy element intermediate alloy; and S3, the TiAl alloy matrix and the alloy element intermediate alloy are subjected to suspension smelting to form the TiAl-based alloy casting. A step-by-step smelting method is adopted for smelting of a TiAl alloy matrix, and the process solves the problem that Ti and Al with the melting point difference of 1000 DEG C are smelted through a suspension smelting technology; a refractory metal intermediate alloy with the melting point similar to that of a TiAl alloy matrix is used as an additive, and the problem that refractory metal components with the very high melting point are added into the TiAl alloy matrix in the suspension smelting process is solved; the TiAl-based alloy casting is prepared by using a centrifugal casting technology combined with suspension smelting equipment, so that metallurgical defects formed in casting blanks are eliminated, and excellent materials can be prepared.

The utility model relates to the field of surge protector equipment, in particular to a fuse and a backup protection surge protector. The fuse provided by the utility model is used for backup protection of a surge protector body and comprises a fusing piece and a heating piece, the fusing piece is used for being connected with the surge protector body in series, the heating piece is matched with the fusing piece, and the heating piece is used for heating the surge protector body when power frequency current passes through a lightning protection circuit where the surge protector body is located. And the fuse element is fused by electrifying and generating heat, so that the lightning protection circuit is disconnected. The impact current resistance of the fuse can be improved.

The liquid discharge head includes a nozzle plate, a pressure chamber base plate, a piezoelectric element, and a heater. The nozzle plate has a nozzle. The pressure chamber base plate is disposed on the nozzle plate. The pressure chamber base plate has a pressure chamber communicating with the nozzle. The piezoelectric element is disposed on the portion of the nozzle plate facing the pressure chamber. The piezoelectric element surrounds the nozzle and is driven to deform the nozzle plate, causing liquid in the pressure chamber to be discharged from the nozzle in the liquid discharge direction. The heater is disposed on the portion of the nozzle plate facing the pressure chamber. The heater surrounds the nozzle to heat the liquid in the pressure chamber.

The invention relates to a 700 DEG C high-temperature titanium alloy for medium and short time use and a preparation method thereof, belongs to the technical field of titanium alloy processing, and solves the problem that a medium and short time high-strength titanium alloy resistant to extreme high temperature (700 DEG C) cannot be prepared in the prior art. The 700 DEG C high-temperature titanium alloy for medium and short time use comprises the following components in percentage by weight: 5.5 to 6.5 percent of Al, 3.0 to 5.0 percent of Sn, 5.0 to 8.0 percent of Zr, 0.5 to 1.5 percent of Mo, 0.2 to 1.0 percent of Nb, 0.6 to 0.8 percent of Si, 1.0 to 2.0 percent of W and the balance of Ti. The room-temperature tensile strength Rm is larger than or equal to 1120MPa, the yield strength Rp0.2 is larger than or equal to 1010MPa, the ductility A is larger than or equal to 8%, and the percentage reduction of area Z is larger than or equal to 10%. At 700 DEG C, the tensile strength Rm is larger than or equal to 610 MPa, the yield strength Rp0.2 is larger than or equal to 470 MPa, the ductility A is larger than or equal to 20%, and the percentage reduction of area Z is larger than or equal to 50%. The material can resist the high temperature of 700 DEG C, and has certain medium and short time high temperature durability and fracture toughness. And the requirements of medium and short time limit high-temperature resistance (700 DEG C) high-strength titanium alloy can be met.

The utility model relates to the field of surge protector equipment, in particular to a fuse and a surge protector. The fuse provided by the utility model is used for backup protection of a surge protector body and comprises a fusing piece and a heating piece, the fusing piece is used for being connected with the surge protector body in series, the heating piece is matched with the fusing piece, and the heating piece is used for heating the surge protector body when power frequency current passes through a lightning protection circuit where the surge protector body is located. And the fuse element is fused by electrifying and generating heat, so that the lightning protection circuit is disconnected. The impact current resistance of the fuse can be improved.

The application belongs to the technical field of biomedicine, and specifically discloses an exonuclease Exo III mutant and related application thereof. Single-point or multi-point combined mutations are introduced at the E71L, Q133I, R170W, D188A and R209K sites of the wild-type sequence shown in SEQ ID NO:1, so as to solve the problems of easy deactivation, high background signal and poor storage stability of the wild-type enzyme in isothermal amplification, thereby greatly improving amplification sensitivity and shortening peak time in DNA / RNA isothermal amplification detection such as RPA and RTMA, and endowing the reagent with excellent high-temperature resistance, so that the reagent can be widely applied to gene detection, pathogen screening, bedside detection, environmental monitoring and development of ambient storage type in-vitro diagnostic kits.

The invention discloses a preparation method of quaternized chitosan-succinic acid-based hollow salt and application of the quaternized chitosan-succinic acid-based hollow salt in air-dried duck meat, and is characterized by comprising the following steps: mixing quaternized chitosan, succinic acid, NaCl and deionized water according to a mass ratio of 1: 2.36: 15: 81.64, uniformly stirring and dissolving, treating for 20-40 minutes under an ultrasonic condition of 100-500W, filtering, washing, and drying to obtain the quaternized chitosan-succinic acid-based hollow salt. The addition mass of the hollow salt used for further pickling the duck meat is 6%, the air-drying time is 3 days, and the air-drying temperature is 16 DEG C. The method has the advantages that the embedding amount of the NaCl and the stability of the hollow structure can be improved, the particle size of the hollow salt is reduced, the size distribution is uniform, and the quality of the duck meat is improved. And when the hollow salt is used for preparing the air-dried duck meat, the TVB-N value and the TBARS value of the duck meat can be reduced, and the sensory quality of the product is improved.

The invention belongs to the technical field of plastic extruding machines, and discloses a plastic master batch processing plastic extruding machine and an extruding technology thereof.The plastic master batch processing plastic extruding machine comprises a machine shell, a first feeding hopper is fixedly installed at the top end of the machine shell, a screw is rotationally connected to an inner cavity of the first feeding hopper, a ball screw is meshed with the middle of the screw, and a driving motor is fixedly installed at the right end of the machine shell; a machine head is fixedly installed at the left end of the machine shell, and a bearing is fixedly installed at the right end of the machine head. A sealing ring makes contact with and seals a one-way air pipe, at the moment, due to the fact that air cannot continue to flow into the one-way air pipe, the pressure intensity in an air box is increased to reach the opening pressure of a pressure pipe, and at the moment, air flows towards the pressure pipe, a push shaft is pushed leftwards, and the bottom end of a rotating plate moves upwards; furthermore, the space between the bottom end of the rotating plate and one side wall of the feeding hopper is reduced, the discharging amount of the melt is reduced, the situation that the extrusion pressure is increased is avoided, and the product quality is improved.

The present application relates to the technical field of ceramic tiles, in particular to a dry particle glaze, antibacterial ceramic tile and a preparation method thereof, wherein the dry particle glaze comprises the following preparation raw materials in percentage by mass: 6-9% corundum, 9-12% fused quartz, 6-9% fused zirconium silicate, and the rest is first dry particles and second dry particles with a mass ratio of 1:(1.8-2.2). The dry particle glaze of the present application is prepared by using the first dry particles and the second dry particles with a specific formula, and is matched with corundum, fused quartz and fused zirconium silicate, so as to improve the melting temperature of the dry particle glaze, so that the initial melting temperature is above 1300 DEG C, the surface antibacterial agent is not coated, and the problem of poor wear resistance of the conventional antibacterial glaze is avoided.

The present invention discloses a low thermal expansion coefficient glass fiber, belonging to the technical field of glass fibers. The glass fiber of the present invention is composed of the following ingredients: SiO2 55.0-63.0%, Al2O3 17.5-25.0%, MgO 9.0-16.5%, B2O3 2.0-9.0%, ZnO 0.1-4.5%, TiO2 0.1-4.0%, ZrO2 0.1-3.0%, HfO2 0.1-2.0%, and Li2O 0.1-2.0%, where the sum of the contents of TiO2, ZrO2, and HfO2 is 1.0-5.0%. According to the low expansion coefficient glass fiber of the present invention, CaO, K2O, and Na2O ingredients are not added, but B2O3, ZnO, TiO2, ZrO2, and HfO2 are simultaneously added, and the proportion of each element is optimized, significantly decreasing the expansion coefficient of the glass fiber in the present invention. The expansion coefficient of the glass fiber in the present invention is as low as 2.77×10-6 / °C. The glass fiber of the present invention has an elastic modulus as high as 93 GPa or more while a low expansion coefficient is guaranteed, which meets the requirements of high-precision parts.

The utility model relates to the field of surge protector equipment, in particular to an arc fuse and a backup protection surge protector. The arc fuse provided by the utility model is used for backup protection of a surge protector body and comprises an arc member and a fusing member, the fusing member is used for being connected with the surge protector body in series, the arc member is matched with the fusing member, and the arc member is used for being electrically connected with a lightning protection circuit where the surge protector is located. And an electric arc is generated to fuse the fuse element, so that the lightning protection circuit is disconnected. The impact current resistance of the arc fuse can be improved.

The invention discloses a micro-droplet jetting additive manufacturing device based on cold crucible suspension smelting, which adopts a water-cooled copper crucible to replace a traditional common oxide crucible, so that the smelting temperature of a micro-droplet jetting system is increased, the melting of a high-melting-point material is facilitated, and the production efficiency of the micro-droplet jetting additive manufacturing device is improved. And the material application range of the micro-droplet spraying additive manufacturing technology is expanded, and micro-droplet spraying additive manufacturing is allowed to be conducted through high-melting-point and high-activity materials. The electromagnetic suspension system formed by the high-frequency induction coil and the water-cooled copper crucible is adopted, so that molten metal can be suspended inside the water-cooled copper crucible, direct contact between alloy melt and the wall of the crucible is avoided, the possibility that the alloy reacts with a crucible material in the smelting process is reduced, and the purity and performance of the alloy are improved. In addition, by means of electromagnetic stirring and heat convection in the crucible, alloy elements can be mixed more uniformly, and the forming quality and performance of the alloy are improved.

The present invention belongs to the field of photovoltaic materials. The present invention relates to a composite encapsulation film for a main grid-free battery assembly, which is prepared by extruding an EVA layer and a POE layer through formula optimization design, extrusion by an extruder, and casting film formation. The EVA layer comprises 100 parts of EVA resin, 0.8-1.2 parts of a cross-linking agent, 1.0-1.5 parts of a co-cross-linking agent, 4.0-6.0 parts of a functional additive, 0.1-0.2 parts of an antioxidant, and 0.3-0.5 parts of a silane coupling agent as raw materials; the POE layer comprises 100 parts of POE resin, 10-15 parts of PP resin, 8-12 parts of a viscous resin, 0.5-1.0 parts of a cross-linking agent, 1.0-1.5 parts of a co-cross-linking agent, 0.05-0.20 parts of an antioxidant, and 0.05-0.15 parts of a light stabilizer as raw materials. The composite film effectively solves the problems that the water resistance and aging resistance of the main grid-free battery assembly encapsulation film in the prior art are relatively poor at the joint, and the bonding force between the film and the battery sheet is relatively weak.

The invention discloses a preparation method of a cocoa butter chocolate product, and belongs to the field of food processing. The preparation method comprises the following steps: firstly compounding mango kernel oil stearin rich in StOSt grease, cocoa butter and porous starch to obtain a StOSt grease-porous starch compound, then uniformly mixing 20g of cocoa butter, 5g of cocoa powder, 15g of skimmed milk powder and 25g of isomaltulose at 45-50 DEG C, and grinding to obtain chocolate slurry; then, 10 g of the StOSt grease-porous starch compound, 0.5 g of lecithin and chocolate slurry are refined; and finally carrying out temperature regulation, injection molding and cooling to obtain the chocolate product. The porous starch structure solves the eutectic phenomenon easily occurring in the physical compounding process of the mango kernel oil stearin and the cocoa butter; meanwhile, the mango kernel oil stearin makes up the characteristic of insufficient hydrophobicity of the starch, enhances the thermal stability of the chocolate, and effectively fixes and disperses cocoa butter, so that the frosting of the chocolate is inhibited.

The invention discloses a full-degradable ultraviolet barrier film material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polycaprolactone triol with isophorone diisocyanate, adding a catalyst and a solvent, heating and stirring to obtain a polyurethane prepolymer solution; and adding an ultraviolet absorbent into the polyurethane prepolymer solution, heating and stirring, removing bubbles and drying to obtain the full-degradable ultraviolet barrier film material. According to the method, chlorogenic acid is added in the process of preparing the film material by taking polycaprolactone triol and isophorone diisocyanate as raw materials, so that the prepared full-degradable ultraviolet barrier film material has an anti-ultraviolet effect; meanwhile, the tensile strength, the elongation at break, the antioxidant activity, the thermal stability, the melting temperature and other properties of the thin film material prepared only from the polycaprolactone triol and the isophorone diisocyanate can be improved; wide application prospects are realized.

The invention discloses a method for preparing a titanium-based high-entropy amorphous alloy with high thermal stability, and belongs to the technical field of high-entropy alloy preparation. The titanium-vanadium-zirconium-niobium-tantalum-molybdenum-boron high-entropy amorphous alloy film of the invention comprises the following chemical components in molar parts: 47.3 parts of Ti, 25 parts of V, 11 parts of Zr, 14 parts of Nb, 2 parts of Ta, 0.5 parts of Mo and 0.2 parts of B. The preparation method comprises the following steps: mixing the chemical components in proportion, smelting, and obtaining a high-entropy alloy target: using a single crystal silicon wafer as a substrate, sputtering the high-entropy alloy target on the surface of the single crystal silicon wafer by a magnetron sputtering method, and obtaining the titanium-vanadium-zirconium-niobium-tantalum-molybdenum-boron high-entropy amorphous alloy film. The invention provides a method for preparing a high-entropy amorphous alloy film with high thermal stability, which solves the problem that the high strength of amorphous alloys cannot be maintained at high temperatures, and has excellent practical value and research value.

The invention relates to low-temperature fired white Yellow River sediment microcrystalline glass and a preparation method thereof. The low-temperature fired white Yellow River sediment microcrystalline glass comprises the following raw materials: 50-65% of Yellow River sediment, 15-25% of CaCO3, 5-10% of dolomite, 3-10% of silica sand, 1-5% of Na2SiF6, 1-5% of K2CO3, 1-5% of chromite and 1-5% of TiO2. B2O3-CuO accounting for 1%-4% of the total weight of the raw materials is added. The preparation method comprises the following steps: (1) melting raw materials to obtain basic molten glass; (2) molding the molten glass to obtain a glass plate; and (3) coring and crystallizing the glass plate, and then carrying out post-treatment. The microcrystalline glass is prepared by firing the Yellow River silt at low temperature, a new way is provided for high-value utilization of Yellow River silt resources, and the product is high in quality and low in cost and has a wide application prospect.

The utility model discloses an adjustable coaxial blowing device for laser welding, which comprises a coaxial blowing base, a connecting ring arranged on the periphery of the coaxial blowing base, a coaxial blowing cylinder arranged on one side of the connecting ring, a height adjusting ring arranged on one side of the coaxial blowing cylinder, a copper nozzle connecting block arranged on one side of the height adjusting ring, and a coaxial blowing nozzle arranged on one side of the copper nozzle connecting block. A first O-shaped sealing ring is embedded in the upper surface of the coaxial blowing base, one side of the coaxial blowing base is connected with an L-shaped threaded quick plug, and an upper suction block is embedded in the lower surface of the coaxial blowing base. The problems that paraxial blowing protection is poor in protection effect on a welding seam with large splashing and the consumption of a protection lens is large are solved, and the device is simple in structure, easy to machine and convenient to operate and use.

The present invention relates to a cable comprising at least one layer comprising a polypropylene composition; the present invention relates to a polypropylene composition comprising a copolymer of propylene and comonomer units selected from ethylene and alpha-olefins having from 4 to 12 carbon atoms wherein the polypropylene composition has a total comonomer content (preferably total ethylene content) of from 4.0 to 11.0 wt%, based on the total weight of the polypropylene composition, the content is determined according to the Crystallization Extraction Method (CRYSTEX) by FT-IR spectroscopy calibrated by a quantified 13C-NMR spectrum; a melt flow rate MFR2 of greater than 2.5 to 6.0 g / 10 min as determined according to ISO 1133 at 230 DEG C and a load of 2.16 kg; a soluble fraction (SF) content of from 10.0 to 25.0 wt%, based on the total weight of the polypropylene composition, as determined by Crystallization Extraction Method (CRYSTEX); and a flexural modulus of greater than 470 MPa to 750 MPa as determined according to ISO 178 method A.

The present application relates to a kind of wear-resistant hydrophobic coating and its preparation method, belong to the technical field of A.A kind of preparation method of wear-resistant hydrophobic coating includes the following steps: the metal substrate after cleaning is pretreated, is placed in vacuum coating furnace and is preheated, ion etching, using Ti-Cr composite target material is carried out Ti-Cr composite sputtering treatment, WC target sputtering treatment, then carries out multi-arc ion plating deposition ta-C layer processing and multi-arc ion plating deposition F-ta-C layer processing, then carries out heat treatment, that is, preparation is completed.The present application is prepared by introducing titanium powder, forming solid solution between metal substrate and chromium, and forming a variety of component stable compounds on its surface, titanium is used as intermediate layer, provides support force, makes each layer element gradient distribution, improves the binding force between chromium element and glass matrix, improves the compactness and uniformity of metal substrate, improves the wear resistance of metal mold, reduces segregation phenomenon.

The utility model relates to the field of surge protector equipment, and especially relates to a thermal tripping assembly and a surge protector. The thermal tripping assembly provided by the utility model is used for thermal tripping and backup protection of a surge protector, and comprises a heating element and a tripping assembly, the tripping assembly comprises a belt body and a connecting assembly, the connecting assembly is located between a lightning protection element and a grounding circuit, the connecting assembly is connected with the belt body through a fuse link, and the fuse link is connected with the heating element. The belt body is matched with the heating piece, and the heating piece is used for being electrified to generate heat to fuse the fusing piece when power frequency current passes through a grounding circuit where the lightning protection element is located.