128results about How to "Oxygen isolation" patented technology

The invention relates to an anti-static PP composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antistatic PP composite material is prepared from the following components in parts by weight: 60 to 80 parts of PP resin, 10 to 20 parts of glass fiber, 0.1 to 0.5 part of a lubricant, 0.3 to 2 parts of a modified antistatic agent, 0.5 to 1.5 parts of a modified flame retardant and 0.2 to 0.8 part of an antioxidant, in the modified antistatic agent, an alkanolamide bond intermediate forms a conductive film, so that the resistivity is reduced, static dissipation is promoted, the material is endowed with lubricity, and the generation of static electricity is reduced; in addition, maleic anhydride forms a conductive layer and cooperates with quaternary ammonium salt to enhance hydrophilicity and accelerate charge transfer; a piperazine pyrophosphate derivative in the modified flame retardant and a phosphorus-nitrogen flame retardant cooperate to construct an expanded carbon layer to isolate a fire source and oxygen, so that the service life is prolonged; the anti-static PP composite material prepared by the invention not only has a good anti-static effect, but also has excellent flame-retardant and tensile properties.

The invention relates to the field of polyolefin plastics, in particular to a glass fiber reinforced modified polyolefin plastic and a preparation method thereof, which are used for solving the problem that the application of the existing glass fiber reinforced modified polyolefin plastic in some high-performance fields is limited due to poor mechanical strength and flame-retardant and fireproof performance of the existing glass fiber reinforced modified polyolefin plastic. According to the preparation method, the organic phosphorus-nitrogen modified glass fiber is added into the polyolefin resin to serve as a reinforcing agent, so that the polyolefin plastic not only is obviously improved in mechanical property, but also can keep relatively good performance in a high-temperature environment, and the flame retardant property and the fireproof grade are obviously improved; and the fireproof door can meet the fireproof standard with higher requirements. Meanwhile, according to the preparation method, a reasonable production process and technical means are adopted, and good combination of the glass fiber and the polyolefin material is ensured, so that comprehensive optimization of the plastic performance is realized, the performance and the application range of the polyolefin plastic are remarkably improved, and the requirement of high-performance application under various complex environmental conditions is met.

The invention relates to a preparation method of a photovoltaic welding strip, the photovoltaic welding strip, a photovoltaic module and a preparation method, and the preparation method comprises the following steps: S1, carrying out the oxide removal and annealing treatment of an oxygen-free copper wire at the same time, and obtaining an annealed copper strip after cooling; s2, in the protection environment of inert gas, the annealed copper strip is immersed in molten brazing filler metal alloy liquid for surface tin plating, and after cooling, a plated copper strip with an alloy plating layer is obtained; s3, oxide on the surface of the plated copper strip is removed; s4, immersing the plated copper strip subjected to oxide removal into a film forming substance, and drying to obtain a film forming welding strip; wherein the film forming substance does not contain carboxyl. According to the method, oxide removal and annealing treatment are carried out at the same time, the photovoltaic welding strip which is high in preparation efficiency and can be welded without participation of scaling powder can be achieved, the photovoltaic welding strip is combined with the preparation technology of a photovoltaic module, and a high-reliability module can be obtained.

The invention relates to the field of high polymer materials, and provides a preparation method and application of composite halogen-free high-phosphorus-content flame-retardant polyester aiming at the problems of non-uniform component dispersion and poor anti-dripping effect of the composite flame-retardant polyester. The preparation method comprises the following steps: mixing dihydric alcohol, terephthalic acid, a catalyst, esterification liquid of the reaction type phosphorus flame retardant and the reaction type nitrogen flame retardant, sequentially carrying out esterification reaction and polycondensation reaction to obtain a melt, and treating the melt to obtain the composite halogen-free high-phosphorus-content flame-retardant polyester. The invention also provides application of the flame-retardant polyester. According to the invention, the reactive phosphorus flame retardant participates in the polyester polymerization process, so that the influence on the molecular regularity of polyester is small, and the crystallization behavior and post-processing performance of slices are not influenced; the apparent viscosity of the polyester is improved by the modified nitrogen flame retardant, the polycondensation time is greatly shortened, and the polyester with lasting flame-retardant effect and good anti-dripping effect is obtained by compounding multiple halogen-free flame retardants.

The invention discloses an anti-aging anticorrosive coating and a preparation method thereof, and relates to the field of coatings. When the anti-aging and anti-corrosion coating is prepared, layered magnesium aluminum hydroxide and 3, 5-di-tert-butyl-4-hydroxybenzoic acid are subjected to a reaction, and anti-aging layered magnesium aluminum hydroxide is prepared; the preparation method comprises the following steps: reacting the anti-aging layered magnesium aluminum hydroxide with chloropropyltrimethoxysilane and N-(2-(N, N-dimethylamino) ethyl) maleimide to prepare a modified layered magnesium aluminum hydroxide; the preparation method comprises the following steps: carrying out a reaction on polytetrahydrofuran, 1H-pyrrole-2, 5-diformaldehyde dioxime, n-dodecyl phosphonic acid, isophorone diisocyanate and diphenylmethane diisocyanate to prepare a prepolymer solution; and uniformly mixing the prepolymer solution with the modified layered magnesium-aluminum hydroxide and aluminum trichloride, and then adding polyether amine to prepare the anti-aging and anti-corrosion coating. The anti-aging anticorrosive paint prepared by the invention has good corrosion resistance, flame retardance, tensile strength and self-repairing performance.

The invention relates to the technical field of new materials, and discloses a flame-retardant functionalized carbon nanotube modified polyethylene material, which is characterized in that organic functional groups and starch macromolecules are introduced to the surfaces of carbon nanotubes, so that the intermolecular distance of the carbon nanotubes is increased, the agglomeration phenomenon of the carbon nanotubes is inhibited, and the flame-retardant functionalized carbon nanotube modified polyethylene material is prepared. According to the present invention, the carbon nano-tubes are introduced into the polyethylene, such that the carbon nano-tubes can be easily dispersed, the carbon nano-tubes can provide the good mechanical property enhancing effect on the polyethylene, the phosphorus element is introduced on the surfaces of the carbon nano-tubes, the starch having the excellent char forming property is introduced, and the flame-retardant phosphoric acid, the flame-retardant polyphosphoric acid and the like can be formed during combustion so as to promote the char forming of the starch and the polyethylene; according to the present invention, the carbon layer with the barrier property is rapidly formed, and the barrier carbon layer can isolate oxygen and heat so as to prevent the further combustion of the polyethylene material, such that the flame retardation self-extinguishing effect is provided so as to obtain the polyethylene material with characteristics of good flame retardation and good mechanical property.

The fire-extinguishing flame-retardant explosion-proof battery storage bag composite structure comprises a heat transfer layer, a cooling explosion-proof layer, a fire-extinguishing barrier layer and a waterproof and fireproof layer which are sequentially arranged from inside to outside, a heat transfer layer, a cooling explosion-proof layer, a fire-extinguishing barrier layer and a waterproof and fireproof layer which are sequentially arranged from inside to outside form a fire-extinguishing flame-retardant explosion-proof battery storage bag composite structure; the heat transfer layer is used for conducting heat generated by batteries in the battery storage bag to the cooling explosion-proof layer; the cooling explosion-proof layer is used for cooling and extinguishing the fire of the batteries in the battery storage bag; the fire extinguishing barrier layer is used for extinguishing and blocking fire of batteries in the battery storage bag; the waterproof and fireproof layer is used for preventing external fire sources and water sources from invading the batteries in the battery storage bag. The explosion-proof battery can prevent internal fire sources from leaking out, can also prevent external fire sources, water sources and the like from invading, can be applied to various protection products needing to be used for charging batteries, is good in fire extinguishing, flame-retardant and explosion-proof performance, guarantees personnel safety, and reduces property loss.

The invention discloses a preparation method of a cement-based artificial lawn blanket, and belongs to the technical field of greening engineering. According to the preparation method, the cement-based artificial lawn blanket comprises three-dimensional mesh cloth, simulated green plants, a cement-based composite material and a packaging layer; the simulated green plant comprises a green leaf part and a grass root part; the preparation method comprises the following steps: S01, preparing the three-dimensional mesh cloth; s02, preparing simulated green plants from low-density polyethylene flame retardant resin, and arranging the simulated green plants in the three-dimensional mesh cloth; s03, pouring a cement-based composite material into the three-dimensional mesh cloth; s04, spraying a packaging layer on the bottom of the three-dimensional mesh cloth; wherein in the step S02, linear low-density polyethylene is used as a matrix for preparing the low-density polyethylene flame retardant resin, and the low-density polyethylene flame retardant resin comprises a composite flame-retardant material composed of an electrodeless flame-retardant material and an organic flame-retardant material. According to the cement-based artificial lawn carpet obtained through the preparation method of the cement-based artificial lawn carpet, simulated green plants are good in flame retardance, and the outdoor color is stable.

The invention discloses a movable transformer with an anti-explosion protection mechanism, and belongs to the technical field of transformers, and the movable transformer with the anti-explosion protection mechanism comprises a transformer, a heat dissipation net groove, two fixing frames, two sponge pieces, a heat dissipation mechanism, a water storage mechanism, two groups of liquid spraying mechanisms and a linkage mechanism. By arranging the heat dissipation net groove, the two sponge pieces, the heat dissipation mechanism, the water storage mechanism, the two liquid spraying mechanisms and the linkage mechanism, through operation of the heat dissipation mechanism, the flowing speed of air in the transformer and air outside the transformer can be increased, and the temperature in the transformer is effectively reduced; and water in the water storage mechanism is sprayed to the surface of the sponge sheet through the liquid spraying mechanism, the heat dissipation effect is further enhanced by utilizing the principle that heat is taken away through water evaporation, stable operation of the transformer is guaranteed, and the service life of the transformer is prolonged. And the sponge sheet is in contact with the surface of the transformer, so that a certain heat insulation effect is achieved, and the direct heating area of the transformer is reduced.

The invention provides a high-heat-resistance copper-clad plate and a preparation process thereof, and belongs to the technical field of copper-clad plates. The preparation process comprises the following steps: pretreating the polyimide film; preparing a mixed glue solution; preparing a prepreg; and hot-pressing and curing. The preparation method comprises the following steps: carrying out a reaction on m-diacetylene benzene, methyl phenyl dichlorosilane and the like used as raw materials to prepare a silicon-containing resin, and carrying out a reaction on isosorbide bis (terephthalate), bisphenol A and dibenzoate used as raw materials under the catalysis of 4-dimethylaminopyridine to prepare a modifier. When the modifier is used for modifying the silicon-containing resin to prepare the modified silicon-containing resin, as the modifier can improve the thermal conductivity of the silicon-containing resin, facilitate uniform distribution of heat and further improve the heat resistance of the silicon-containing resin, after the modified silicon-containing resin is added into a modified glue solution, the heat resistance of the modified glue solution can be effectively improved, and the service life of the modified glue solution is prolonged. Therefore, the effect of improving the heat resistance of the copper-clad plate is achieved.

The invention belongs to the technical field of cables, and provides a high-temperature-resistant low-smoke halogen-free flame-retardant twisted-pair cable for a building security system and a preparation method thereof. Magnesium hydroxide is modified by adopting a sol-gel method, and the surface of the magnesium hydroxide is coated with silicon dioxide, so that the magnesium hydroxide has excellent hydration effect and free radical capture capability at high temperature, and the flame retardance and smoke suppression performance are improved; secondly, on the basis of alkaline lignin, through chemical modification of phosphonitrilic chloride trimer and triphenyl phosphate, a phosphorus-nitrogen structure and a phosphate group are introduced, the thermal stability and carbonization capacity of lignin are remarkably enhanced under the catalytic action of titanium dioxide, and a compact carbonization protection layer is formed to block oxygen and heat. The two flame-retardant materials are respectively fused and mixed to finally obtain the low-smoke halogen-free flame-retardant cable. The cable material has excellent flame retardance and low smoke emission performance, and is suitable for building security and protection systems with high safety requirements.

The invention provides a method for performing flame-retardant finishing on a copper ammonia fabric by using a barley bran extract, the flame-retardant finishing method is as follows: a core-shell structure flame retardant is loaded to the surface of the copper ammonia fabric through a padding process, the core-shell structure flame retardant takes polyguanidine and sodium alginate as a shell layer and takes the barley bran extract as a core layer, and the core layer is a shell layer; the polyguanidine and the sodium alginate are combined through self-assembly. The barley bran used in the invention is a by-product of barley processing, efficient utilization of resources is realized through processing of the barley bran, use of halogen in a traditional flame retardant is avoided, and the method has the characteristic of environmental friendliness.

The invention provides a processing method of a permanent magnet synchronous motorized spindle motor for a high-speed high-precision numerical control machine tool, which is used for optimally designing the processing technologies of a stator iron core, an armature winding, grinding of a stator iron core with a winding and a rotor iron core. A five-in-one lamination process is designed for the stator core, a dynamic paint dipping process is designed for the armature winding, a cooling-liquid-free intermittent air-cooling dry grinding process is designed for the stator core with the winding, and a seven-step lamination forming process is designed for the non-uniform segmented herringbone skewed pole rotor core. The electrical performance of the motorized spindle motor can be improved, and the overall precision of the motorized spindle can be improved.

The invention discloses a garbage treatment system for inhibiting advanced combustion of medical garbage in the technical field of medical garbage treatment, and the garbage treatment system comprises a medical garbage pretreatment system for performing high-temperature cooking sterilization and disinfection on the medical garbage; the crusher is used for crushing the disinfected medical waste so as to facilitate combustion; the garbage pool is used for temporarily storing the crushed medical garbage and household garbage; the waste incineration system is used for incinerating medical waste and household waste; the flue gas treatment system is used for purifying harmful flue gas generated by waste incineration, and the proportion of oxygen to inert gas in the clean flue gas exhausted by the flue gas treatment system is lower than that of oxygen to inert gas in air; and the flue gas introduction device is used for introducing the clean flue gas into the crusher so as to reduce the probability of fire breakout of the garbage in the crusher.

The invention discloses a medical silica gel sealing ring material and a preparation method thereof, and relates to the field of silica gel materials. When the medical silica gel sealing ring material is prepared, mica powder, phytic acid, diglycidyl ether and allyl glycidyl ether are uniformly mixed and react to obtain modified mica powder; the preparation method comprises the following steps: reacting 4-(2-aminoethyl) phenylboronic acid with 3, 3 '-dihydroxy-[1, 1'-biphenyl]-4, 4 '-diformaldehyde to obtain a graft; the preparation method comprises the following steps: reacting vinyl silicone oil, thioglycerol and methacryloylethyl sulfobetaine to obtain modified silica gel; uniformly mixing the modified silica gel, the modified mica powder and the graft, and reacting to obtain the medical silica gel sealing ring material. The medical silica gel sealing ring material prepared by the invention has excellent flame-retardant, anti-aging, antifouling and mechanical properties.

The invention relates to the technical field of thermal transfer carbon ribbons, and discloses a high-efficiency thermal transfer carbon ribbon back coating adhesive and a preparation method thereof. Tetrakis(hydroxymethyl)phosphonium chloride, vinyl trichlorosilane and 2,5-bis(trifluoromethyl)terephthalic acid are used as raw materials to synthesize a diene fluorine-containing caged siloxane monomer, and the monomer is polymerized with pentaerythritol tetraacrylate to form a cross-linked organic silicon acrylic copolymer with a hyperbranched cross-linked network structure, which replaces a traditional organic silicon resin mixture. The copolymer is diluted with a single solvent toluene to avoid the use of a multi-component mixed solvent, greatly reduces VOC emissions, and can be recycled. The carbon ribbon back coating adhesive prepared by the invention has good heat resistance and wear resistance, smooth printing, good bonding performance, can enhance heat conduction and lubrication in a printing process, effectively eliminates the risk of static electricity generated in an actual application process, has a good flame retardant effect, and avoids safety hazards.

This invention discloses a method for producing granules that reduces the loss of active ingredients, relating to the field of granule preparation technology. This method addresses the problem of active ingredient loss in traditional granule production due to high temperatures, oxidation, mechanical friction, and solvent residue. It employs a four-stage process—low-temperature pretreatment, inert gas-protected granulation, gradient drying, and nano-coating and end-capping—combined with the application of a specialized composite binder, significantly improving the retention rate of active ingredients. Experimental data shows that granules produced using this method have a higher retention rate of active ingredients than those produced by traditional methods, while also exhibiting high granule formation rate and dissolution rates that meet relevant standards. The process of this invention is highly stable and widely adaptable, and can be widely applied to granule production in the pharmaceutical, pesticide, food, and feed industries.

The safety monitoring device comprises a cabinet body, a temperature sensor is installed on the left side wall in the cabinet body, an alarm is installed on the right side of the top of the cabinet body, a box door is arranged on the front side of the cabinet body, a control panel is arranged on the front side of the box door, and a closing mechanism is arranged on the left side of the cabinet body. The closing mechanism comprises a through groove formed in the left side wall of the cabinet body, the cabinet body is provided with a sliding groove, and the sliding groove is located above the through groove. According to the safety monitoring device for the positive-pressure anti-explosion cabinet, two hydraulic rods are controlled to be started through a control panel, and matched with a straight toothed plate, a gear and a driving rod to drive a connecting rod to rotate, so that a baffle is driven to move, the baffle moves to drive a mounting rod and a rotating rod at the top and the bottom to rotate, and when the other end of the mounting rod rotates to the corner of the top of a through groove, the rotating rod rotates; and the baffle can block the ventilation plate, oxygen in the cabinet body can be isolated, the spark combustion trend is controlled, and the safety of the device is improved.

The utility model discloses a fully-immersed cooling battery system. The fully-immersed cooling battery system comprises a lower box body, an upper cover, a flow equalizing plate and a battery module, the battery module is located in the lower box body, the flow equalizing plate is arranged between the battery module and the upper cover, the upper cover is provided with a liquid inlet assembly, the liquid outlet end of the liquid inlet assembly is connected with a spraying device, the lower box body is provided with a liquid outlet, and the flow equalizing plate is provided with a flow channel used for conducting flow guiding, flow dividing or flow equalizing on cooling liquid sprayed out by the spraying device. Therefore, the cooling liquid entering in a radial manner is subjected to flow equalizing and guiding, so that the cooling liquid uniformly flows to the top of the battery module, then flows through the gaps of the battery module and flows out of the liquid outlet. According to the utility model, the spraying device and the flow equalizing plate are matched with each other, an upper-inlet lower-outlet flow direction is adopted, a circulating flow channel with high uniformity and a short circulating path is provided, a cooling liquid flowing path is short, the distribution is uniform, all-directional cooling is realized, the temperature of a battery system under a fast charging condition can be effectively controlled, and the system achieves the effects of efficient heat exchange and excellent temperature equalization.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The present invention relates to a preparation method of a solid-state battery cell and a solid-state battery cell. The preparation method of the solid-state battery cell comprises: providing a prefabricated cell, the prefabricated cell comprising an aluminum-plastic film and a bare cell; performing a first injection process on the prefabricated cell, the substances injected in the first injection process comprising a monomer, an initiator and an electrolyte; performing a curing process on the prefabricated cell, so that the monomer is polymerized under the action of the initiator to form a gel electrolyte; the gel electrolyte wraps the bare cell; performing a first exhaust process on the aluminum-plastic film to discharge the by-products in the aluminum-plastic film; performing a second injection process on the prefabricated cell to inject a thick flame retardant into the aluminum-plastic film, the thick flame retardant is in contact with the gel electrolyte; the thick flame retardant is formed by mixing an electrolyte additive with a fire-extinguishing microcapsule; performing a second exhaust process on the aluminum-plastic film to exhaust the air in the aluminum-plastic film. The method can improve the safety of the solid-state battery cell.

This invention provides a low-density flame-retardant thermally conductive foam powder filler, composed of the following components in parts by weight: 200-300 parts of boron nitride (80-100 micrometers); 200-300 parts of hollow glass microspheres (50-70 micrometers); 200-300 parts of aluminum hydroxide (8-10 micrometers); 200-300 parts of aluminum hydroxide (1-2 micrometers); and 2-4 parts of coupling agent. Its advantages are: 1. Low density: By introducing low-density hollow glass microspheres, the overall density of the filler is effectively reduced, meeting lightweight design requirements. 2. High thermal conductivity: The compound boron nitride forms a highly efficient thermal conductivity network. 3. Excellent flame-retardant performance: The halogen-free flame retardant aluminum hydroxide works synergistically with the hollow glass microspheres. The hollow glass microspheres form a glassy barrier at high temperatures, isolating oxygen and heat, achieving excellent flame-retardant effects. 4. Good dispersibility and compatibility: By modifying the powder surface with silane coupling agent, a "molecular bridge" is formed between the inorganic powder and the organic polymer matrix, which significantly reduces agglomeration, lowers the interfacial thermal resistance, and significantly reduces the viscosity of the system.

This invention discloses a novel in-situ solid electrolyte and its preparation method, comprising: mixing precursor A and precursor B, and carrying out a hydrolysis-condensation reaction under the action of a catalyst to obtain a POSS-based curing agent with R1 and R2 groups; in an inert environment, sequentially mixing the POSS-based curing agent, a double lithium salt, an organic solvent, and an initiator to obtain a precursor liquid; injecting the precursor liquid into a battery casing and allowing it to stand and soak, so that the precursor solution can fully penetrate the electrode pores; heating the battery after liquid injection at 45-80°C for 4-24 hours to initiate the polymerization and cross-linking of the R2 groups to form a three-dimensional network, and the R1 groups undergo microscopic phase separation to repel the electrolyte phase, constructing ion transport channels in the POSS cross-linked network, while the POSS framework adsorbs and fixes anions, thus forming a solid electrolyte in situ; improving the rate performance of the battery and effectively eliminating the risk of lithium dendrite precipitation under low-temperature fast charging conditions.

The invention discloses a polypropylene composite material with weather resistance and flame retardancy and a preparation method thereof, and belongs to the field of thermoplastic high molecular polymer materials. The invention comprises the following steps: a benzyl-containing hindered phenol antioxidant, bromine and a free radical initiator react to obtain a brominated hindered phenol antioxidant; the brominated hindered phenol antioxidant reacts with an amino-terminated organosiloxane to obtain a hindered phenol-organosiloxane; hindered phenol-organosiloxane, a carbon-carbon double bond-terminated organosiloxane and an organic weak acid react to obtain a carbon-carbon double bond-terminated hindered phenol-organosiloxane; hindered phenol-organosiloxane and propylene are polymerized under the action of a composite catalyst to obtain a polypropylene composite material. The invention directly introduces a functional group with flame retardancy and antioxidant properties into the main chain of polypropylene by covalent crosslinking during the preparation process of polypropylene, and then polymerizes to obtain a polypropylene composite material with weather resistance and flame retardancy.

The invention relates to the technical field of polymethyl methacrylate, and discloses a flame-retardant polymethyl methacrylate material and a preparation method thereof.The flame-retardant polymethyl methacrylate material is obtained by reacting polymethyl methacrylate, a hydroxyl-terminated flame retardant and p-toluenesulfonic acid. The linear polymethyl methacrylate is crosslinked into a three-dimensional network structure, so that the crosslinking degree between molecular chains is enhanced, the molecular chains are not easy to slip under stress, good structural stability is maintained, and the polymethyl methacrylate has high tensile strength and bending strength. The flame retardant contains piperazine rings and phosphate structures, forms an intumescent flame-retardant system, generates phosphoric acid substances, nitrogen and other gases during combustion, promotes dehydration of a matrix to form an intumescent carbon layer, isolates oxygen, prevents heat conduction, inhibits the combustion process, remarkably reduces the peak value of the heat release rate and the total heat release amount, and has excellent flame-retardant performance.

The invention relates to the technical field of quantum dot substrates, and specifically to a quantum dot substrate, comprising a shell, an air filling mechanism, a brightening mechanism, a shielding mechanism, and an extrusion mechanism. An inert gas is filled into a second cavity through an air core, so that the surrounding of a quantum dot film can be prevented from being exposed to water and oxygen. A light source is focused through a convex film, and the light source passes through a light-transmitting plate and is refracted and reflected by a reflective baffle wall to achieve a greater lighting effect. At the same time, a reflective baffle wall is provided to prevent color mixing caused by misexcitation of a quantum dot light-emitting unit. Heat generated by a lamp bead enters a second connecting groove through a first connecting groove on a fixed body, and the heat is discharged from the second connecting groove. External cold air enters from the second connecting groove. A sponge is provided to prevent dust from entering, and a sponge is provided to absorb water vapor to prevent external water vapor from entering the interior. The curtain protects the display screen from being contaminated with dust.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

The invention belongs to the technical field of electrical cabinets, and discloses a multilayer drawer type electrical cabinet with good heat dissipation performance, which comprises an electrical cabinet shell with supporting legs welded at the bottom, a fixed frame plate is fixed on the inner wall of one side of the electrical cabinet shell through bolts, and C-shaped sliding rails distributed at equal intervals are welded on the outer walls of the two sides of the fixed frame plate; t-shaped sliding blocks are slidably inserted into the inner walls of the C-shaped sliding rails, a mounting bracket is welded between the two T-shaped sliding blocks, and a monitoring camera is mounted on the inner wall of one side of the top of the electrical cabinet shell. The temperature sensor is arranged in the electrical cabinet, the internal situation can be fed back and known in real time, the smoke particle sensor is matched with the monitoring camera to achieve dual monitoring means, short-circuit fire can be rapidly alarmed, when short-circuit fire occurs, oxygen can be effectively isolated through carbon dioxide rapidly sprayed out, and the safety of the electrical cabinet is improved. The fire behavior is restrained or the fire extinguishing condition is achieved, and the overall safety can be effectively improved.

The application discloses a kind of photovoltaic conductive paste, belongs to conductive paste technical field.The paste includes silver powder, metal silicide, nano silicon powder, glass powder, organic auxiliary agent and organic carrier, silver powder is compounded with sintered active silver powder and smooth surface silver powder, metal silicide is selected from two and above combinations in TiSi2 And NiSi2 And / or CoSi2, organic carrier contains rosin resin antioxidant component.The application is compounded by titanium and nickel / cobalt silicide, cooperates with the antioxidation protection of nano silicon powder and rosin resin, effectively reduces the contact resistance of paste and silicon wafer, inhibits interface carrier recombination, widens sintering process window.The obtained paste is suitable for screen printing, and after sintering, it is in good contact with silicon substrate, can significantly improve the photoelectric conversion efficiency of high-efficiency photovoltaic cells such as TOPCon, and the comprehensive performance is better than that of traditional conductive paste, suitable for industrial production.

The invention provides a flame-retardant antistatic nylon fiber with a skin-core structure and a preparation method of the flame-retardant antistatic nylon fiber, and belongs to the technical field of nylon fibers. The flame-retardant antistatic nylon fiber comprises an antistatic nylon skin layer and a flame-retardant nylon core layer, the outer surface of the flame-retardant nylon core layer is coated with the antistatic nylon skin layer, the antistatic nylon skin layer comprises a nylon 6 matrix and an antistatic agent, and the antistatic agent is aniline modified zirconium phosphate; wherein the aniline modified zirconium phosphate is obtained by carrying out in-situ polymerization on aniline monomers between stripped zirconium phosphate layers. The flame-retardant antistatic nylon fiber is obtained through sheath-core composite melt spinning. According to the invention, the antistatic agent and the flame retardant are efficiently and stably introduced into the nylon matrix, and the synergistic effect of the antistatic agent and the flame retardant is realized, so that the fiber has better spinnability and mechanical property, and meanwhile, the long-term effect and durability of the function are ensured.