81results about How to "Reduce burn rate" patented technology

The invention discloses a fire-retardant viscose fiber and a preparation method thereof, wherein a silicon and aluminum composite fire retardant is contained in the fire-retardant viscose fiber and the preparation method of the fire-retardant fiber comprises the steps of: obtaining a spinning solution through taking cellulose pulps as a raw material and subjecting to the processing steps of yellowing, dissolving, defoaming and filtering, subjecting the spinning solution to spinning and forming in a coagulating bath, subjecting to post-processing steps of washing and desulfurization, adding right amount of sodium metasilicate and sodium metasilicate solution into a cellulose viscose solution which is dissolved to any process before the spinning and then uniformly mixing. According to the invention, the silicon and aluminum composite fire retardant is utilized to ensure that the fire-retardant effect of the prepared fire-retardant viscose fiber is greatly increased and the high temperature and alkaline resistances of the fire-retardant viscose are greatly increased; and therefore, the fire-retardant viscose fiber can be popularized and applied in high-temperature environments such as the fields of high-temperature filter media, filter materials and the like.

The invention provides a POSS/PA6 (polyhedral oligomeric silsesquioxane/polycaprolactam) composite material and a preparation method thereof. The composite material is prepared from 70-99 parts of PA6, 1-30 parts of POSS, 0.1-1 part of antioxidant and 0.1-1 part of lubricant through mixing, granulating and extruding. According to the invention, the novel POSS monomer is used and added into the PA6, so that the intensity of the composite material is enhanced, the application temperature range of the composite material is enlarged, the composite material has high oxidation resistance and water resistance, the flammability and combustion rate of the composite material are reduced, and the composite material has high glass transition temperature and low heat conductivity.

The invention discloses a high-strength heat-resistant modified silicon rubber power cable sheath material which is prepared from the following raw materials in parts by weight: silicone rubber, fluorine rubber, nano calcium carbonate, modified silica, potassium titanate whiskers, aluminum hydroxide, ferric oxide, tin oxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, methyltris(methylethylketoximino)silane, benzoyl peroxide, hydroxyl silicone oil, an amino silane coupling agent, dibutyltin dilaurate, magnesium oxide, a hydroxy stearic acid, an accelerant, an antiager, and a plasticizer. The high-strength heat-resistant modified silicon rubber power cable sheath material disclosed by the invention is high in strength and good in heat resistance, and a cable sheath prepared by using the high-strength heat-resistant modified silicon rubber power cable sheath material is good in comprehensive performance and long in service life.

The invention relates to a preparation method of high-flame-retardancy expandable graphite, which comprises the following steps: oxidizing graphite by using concentrated sulfuric acid/nitric acid mixture, nitric acid/phosphoric acid mixture, fuming nitric acid or concentrated sulfuric acid together with a solid strong oxidizer which accounts for 5-60 wt% of graphite, wherein the reaction temperature is 15-50 DEG C, and the reaction time is 10-100 minutes; after the reaction finishes, filtering, and washing with water until the pH value is 4-7, thereby obtaining the primary expandable graphite; and reacting the primary expandable graphite with guanidine salt solution at 20-80 DEG C for 20-200 minutes, carrying out repeated vacuum filtration, washing with water until the pH value is 6-7, and baking at 40-80 DEG C for 10-72 hours to obtain the high-flame-retardancy expandable graphite. The method provided by the invention intercalates guanidine salts into the interlayer of the expandable graphite, enhances the expansion ratio and flame retardancy, and can be widely used for flame retardancy for plastics, rubber, paint, foam and various other materials.

The invention discloses an intumescent flame retardant, a flame-retardant polylactic acid material and preparation methods of the intumescent flame retardant and the flame-retardant polylactic acid material. The intumescent flame retardant consists of a chitosan salt and ZIF-8@GO in a mass ratio of (96-80):(4-20), the chitosan salt is prepared by reacting 2-carboxyethyl(phenyl)phosphinic acid withchitosan, and the ZIF-8@GO is prepared by loading a zeolite imidazate framework material ZIF-8 on graphene oxide; a chloroform solution of polylactic acid and a chloroform dispersion liquid of an intumescent flame retardant are blended according to a mass ratio of 95:5 by adopting a solution blending method, and coating is performed to prepare the flame-retardant polylactic acid material. The flame-retardant polylactic acid material is simple in formula, halogen-free and environment-friendly, the mechanical property and flame-retardant property of polylactic acid are remarkably improved, themolten drop phenomenon of the flame-retardant polylactic acid material is obviously weakened, a continuous and compact carbon layer is generated after combustion, and the effects of heat insulation and oxygen insulation are achieved.

The invention discloses a preparation method of expansible graphite with a flame retardant property. The preparation method comprises the following steps: dissolving ammonium polyphosphate and potassium dichromate accounting for 20%-50% of the mass of the ammonium polyphosphate in a phosphoric acid having the mass fraction of 75% to form a phosphoric acid solution in which the concentration of the ammonium polyphosphate is 0.02g/ml-2g/ml; taking a mixed solution of sulfuric acid and nitric acid or a concentrated sulfuric acid solution and oxidizing graphite by use of potassium dichromate accounting for 10-20% of the mass of the graphite to obtain a primary expansible graphite; reacting the phosphoric acid solution with the primary expansible graphite at a temperature in the range of 70-80 DEG C, after the reaction is finished, filtering and washing with water until the pH is in the range of 6-7, and drying at 100 DEG C for 6-12 hours to obtain the expansible graphite with the flame retardant property. The preparation method of the expansible graphite with a flame retardant property is characterized in that a phosphorous compound is inserted between the layers of the graphite so that the adhesion of the prepared expansible graphite with the high flame retardant property to each other can be improved so that a better flame retardant effect can be achieved, in addition to a relatively high expansion volume of the expansible graphite.

The invention relates to the technical field of boilers, in particular to an in industrial boiler. The industrial boiler comprises a boiler body, a switch door, a storage mechanism, a pressure reliefstructure and an air inlet mechanism. The boiler body for supplying coal to combust and exchange heat is connected to the switch door for adding coal, the boiler body is connected to the storage mechanism used for adding water and discharging steam, the boiler body is connected to the pressure relief structure for relieving pressure of water vapor, the boiler body is connected to the air inlet structure for conveying oxygen to combust the coal, and the air inlet structure is connected to the pressure relief structure; and the pressure relief structure is matched with the air inlet structure touse. The oxygen flux in a storage room is reduced while the pressure of the water vapor in a water storage room is relieved by means of the pressure relief structure, the combustion rate of the coalin the storage room is reduced, and the boiler body is prevented from being damaged as a result of too large pressure in the water storage room, so that the water vapor generation capacity in the pressure relief process of the water storage room is reduced, the water vapor amount flowing from a pressure relief port is reduced, and the loss of the water vapor relived in pressure is reduced.

The invention discloses a water-based formaldehyde-free adhesive for a flame-retardant composite board and a preparation method thereof. The adhesive is mainly prepared from a fumaric acid-aluminum complex, a 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide compound, a microencapsulated isocyanate and defatted bean flour. During high-temperature combustion, isocyanate generated by decomposition of defatted bean flour and isocyanate generated by decomposition of polyurethane react with fumaric acid to form an imine structure, the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and the imine structure are subjected to an addition reaction to generate a nitrogen-containing compound, the nitrogen-containing compound is thermally decomposed during combustion to generate ammonia inert gas, the combustible gas concentration and the combustion rate are reduced; the nitrogen-containing compound is subjected to a nitrogen-containing reaction to form a nitrogen-containing flame retardant, and the concentration and combustion rate of combustible gas are reduced. The nitrogen-containing compound is combusted to form a carbon layer, molten drops are reduced, and the flame retardant property is improved. The adhesive prepared by the method improves the water resistance on the basis of a water-based adhesive, does not contain aldehyde groups, does not release formaldehyde to pollute the environment, has good flame retardant property, can effectively slow down the combustion rate of the composite board, and has very high practicability and production value.

The invention relates to an intumescent flame-retardant heat-insulating fireproof coating and a preparation method thereof, the intumescent flame-retardant heat-insulating fireproof coating is formed by mixing a component A, a component B and an auxiliary agent, the component A comprises an adhesive, a catalyst, a coupling agent, a foaming agent, an inorganic flame retardant, an organic flame retardant, a high-temperature adhesive, a combustion improver, a water removal agent, a smoke absorbent, an anti-aging agent and an ultraviolet absorbent; the component B comprises a curing agent, a plasticizer and a chain extender; and the auxiliary agent is a diluent. The intumescent flame-retardant heat-insulating fireproof coating has the advantages that the intumescent flame-retardant heat-insulating fireproof coating is suitable for protection of various indoor and outdoor materials, particularly suitable for occasions with high fireproof performance requirements, such as electric power, information and petrochemical industries, can delay object ignition or reduce the combustion speed of a protected base material, can quickly release heat after the surface temperature of the intumescent flame-retardant heat-insulating fireproof coating exceeds 290 DEG C, a carbon flocculent isolation layer is formed through expansion, and conduction of the heat effect is isolated.

The invention discloses a highly-efficient bamboo charcoal organic fertilizer. The fertilizer comprises components with the following parts by weight: 3 to 5 parts of humic acid, 10 to 20 parts of alfalfa hay, 0.3 to 0.7 part of castor oil, 10 to 20 parts of herba andrographitis, 10 to 16 parts of cordate houttuynia, 12 to 14 parts of tobacco stems, 20 to 30 parts of bamboo charcoal, 0.03 to 0.08 part of a microbial bacterium liquid, and 0.02 to 0.06 part of an auximone, wherein the microbial bacterium liquid comprises components with the following parts by weight: 0.01 to 0.03 part of a rhizobium liquid, 0.01 to 0.02 part of an azotobacter chroococcum liquid, and 0.01 to 0.03 part of a bacillus megatherium liquid; the concentrations of the three bacterium liquids are all 3.4*10<7>/ml; the auximone comprises components with the following parts by weight: 0.01 to 0.03 part of vitamin B, and 0.01 to 0.03 part of brassinolide; the components go through pretreatment, mixing, fermentation, extrusion molding and low-temperature drying to obtain the finished product. The fertilizer provided by the invention has the advantages that bamboo charcoal, microbial bacteria and other components are effectively combined, so that organic substances and nitrogen sources in the air can be effectively absorbed and transformed into necessary auximones for plants through microbial fermentation, which can effectively promote plant growth, increase the yield, facilitate loosening of plate lands, and improve the air quality; the fertilizer is environment-friendly and highly-efficient.

The invention relates to a preparation method of a low-VOC flame-retardant composite filling material. Boehmite is crushed in a crushing machine and is sieved by a 500-mesh sieve; then, the boehmite,bentonite and hydroxyapatite are sufficiently mixed and are stirred for 40 to 60 min in a high-speed stirring machine to obtain a mixture; next, tetrabromobisphenol S ether and nanometer calcium silicate are added into the mixture, and are subjected to sufficient stirring and mixing for 20 to 40 min; cooling is performed to reach the room temperature; the low-VOC flame-retardant composite fillingmaterial is obtained. By using the technical scheme, the low-VOC flame-retardant composite filling material is synthesized; the functions of improving the polyolefin flame-retardant performance and VOC performance can be improved at the same time; important popularization values are realized.

The invention relates to the technical field of preparation of polyurethane synthetic leather and in particular relates to a preparation method of flame-retarding type polyurethane synthetic leather.The polyurethane synthetic leather with high strength and strong flame-retarding performance is prepared by taking a woven fabric as a substrate, and polyurethane resin, modified self-made magnesium-aluminum hydrotalcite powder and self-made silica sol as a reinforcing agent, and adding with red phosphorus, calcium carbonate and the like; firstly, the self-made magnesium-aluminum hydrotalcite is prepared through a salt-alkali co-precipitation method; the self-made magnesium-aluminum hydrotalcite is subjected to surface modification by utilizing sodium tripolyphosphate; P3O10<5-> and magnesiumions and aluminum ions in the self-made magnesium-aluminum hydrotalcite are subjected to coordinating bonding reaction, so that one layer of protection film is formed; the self-made magnesium-aluminumhydrotalcite is adopted so that the surface temperature of the substrate is reduced and a flame-retarding effect is realized; the red phosphorus can react with an ester group in polyurethane at hightemperature, so that thermal cracking and volatilization of a polymer is reduced and oxygen and heat are isolated; furthermore, the strength and the flame-retarding performance of the polyurethane synthetic leather is improved, and the polyurethane synthetic leather has a wide application prospect.

The invention discloses a flame retardant material and a preparation method thereof and an automobile engine trim cover. The preparation method of the flame retardant material comprises the following steps of: stirring high-purity montmorillonoid in a high-speed stirrer at a high speed, adding 10-30 percent by weight of adjuvant when the temperature of the high-purity montmorillonoid reaches 85-95 DEG C, and continuously stirring to obtain organic montmorillonoid; adding 20-30 percent by weight of polypropylene to the organic montmorillonoid, stirring for 5-10min in a low-speed stirrer at a low speed, and carrying out extrusion and granulation in a high-shear double-screw extruder to obtain nanometer organic master batch of the high-content montmorillonoid; and mixing the nanometer organic master batch and the polypropylene according to a proportion of 5-8 percent by weight, and carrying out extrusion and granulation in a low shear double-screw extruder to obtain the flame retardant material. Tests show that the flame retardant material has improved mechanical property which is 50 percent higher than that of the traditional polypropylene composite material. The flame retardant material disclosed by the invention has the advantages of improving the flame retardant performance and increasing the anti-aging performance and is particularly suitable for production of the automobile engine trim cover.

The invention provides an arc extinguishing chamber, which comprises two side plates and an arc extinguishing grid plate group fixedly arranged between the two side plates. The arc extinguishing gridplate group comprises a plurality of first arc extinguishing grid plates and a plurality of second arc extinguishing grid plates. The plurality of first arc extinguishing grid plates are arranged under the plurality of second arc extinguishing grid plates; the thickness of each first arc extinguishing grid plate is larger than that of each second arc extinguishing grid plate; and the space betweentwo adjacent first arc extinguishing grid plates is larger than the space between two adjacent second arc extinguishing grid plates. The invention also provides an arc extinguishing system, which comprises the arc extinguishing chamber and a static contact and a moving contact opposite to the arc extinguishing chamber. The moving contact can be contacted with or separated from the static contact.By carrying out differentiated setting on the thickness of each arc extinguishing grid plate of the arc extinguishing grid plate group and the space between two adjacent arc extinguishing grid plates, arc erosion resistance is improved, and electrical life is improved.

The invention discloses a flame retardant for thin cigarettes, wherein the flame retardant comprises aluminum dihydrogen phosphate and PEG. The invention further discloses applications of the flame retardant, wherein the flame retardant is applied to preparation of fin cigarette paper. The invention further discloses applications of the thin cigarette paper, wherein the thin cigarette paper is applied to preparation of thin cigarette paper capable of regulating the combustion rate of a thin cigarette. The invention further discloses a preparation method of the thin cigarette paper capable of regulating the combustion rate of the thin cigarette. By using the thin cigarette paper capable of regulating the combustion rate of the thin cigarette, the combustion rate of a thin cigarette can be effectively regulated, the phenomenon of cigarette end falling caused by overlong combustion cone is reduced, irritation can be remarkably reduced, the ash wrapping effect after cigarette combustion isimproved, and the combustion quality and the consumption experience of thin cigarettes are effectively improved.

The invention discloses an energy-saving cooking range capable of saving energy at a frying interval. The energy-saving cooking range comprises a pot body; carrying rods are fixedly connected with thebottom of the pot body; carrying pipes are in sliding fit with the side faces of the carrying rods; a stove body is fixedly connected with the bottoms of the carrying pipes; a blast pipe is arrangedon the side face of the stove body in a penetrating and inserting manner; an extruding rod is arranged on the side face of the blast pipe in a penetrating and inserting manner; a transitional spring is fixedly connected with the bottom of a transitional rod; a wind shield is fixedly connected with the bottom of the transitional spring; a clamping rod is in sliding fit with the side, close to the blast pipe, of the wind shield; a fixed block is in sliding fit with the side face of the clamping rod; an air receiving rod is fixedly connected between the carrying rods and with the bottom of the pot body; and a pressure sensing switch is arranged at the bottom of the air receiving rod. Through cooperative application of the carrying rods and the transitional rod, the energy-saving cooking rangecan realize the effect of adjusting the coal combustion rate at a frying interval to further change the stove body output temperature.

The invention belongs to the technical field of vehicles, and discloses an engine exhaust temperature control method and an engine. The engine exhaust temperature control method comprises the following steps that the actual exhaust temperature T of the engine is obtained; the actual exhaust temperature T of the engine, the first-stage exhaust temperature starting preset value T1 and the second-stage exhaust temperature starting preset value T2 are compared, and the first-stage exhaust temperature starting preset value T1 is smaller than the second-stage exhaust temperature starting preset value T2; when T is larger than or equal to T1 and smaller than or equal to T2, the EGR control exhaust temperature mode is started, so that exhaust gas is connected into an intake manifold of an engine cylinder; and when T is larger than T2, the torque-limiting exhaust temperature control mode is started, and the fuel injection quantity and the air inflow of the engine are limited. According to the engine exhaust temperature control method, different exhaust temperature control modes are selected according to the actual exhaust temperature T of the engine to achieve hierarchical control over the exhaust temperature of the engine, compared with the prior art that the exhaust temperature is directly controlled through torque limiting, the control flexibility is improved, the output power of the engine is increased to a certain degree, and the user experience is improved.

The invention discloses a water adding and spraying system for an alcohol engine. The water adding and spraying system for the alcohol engine comprises a diesel oil supply device, a diesel oil spraying device, an alcohol supply device, an alcohol spraying device, an engine electronic control unit and an engine body, and is characterized in that after alcohol fuel which is discharged from the alcohol supply device is mixed with water discharged from a water supply system in an alcohol and water mixer, the mixture is discharged to the alcohol spraying device and is sprayed into the engine. On the basis of a methanol/diesel double-combustion engine, the characteristic of ultimate mutual solubility of water and methanol, the alcohol and water mixer is added on an alcohol delivering track, theair inlet temperature is reduced when in high load by use of the advantage of high latent heat of evaporation, then the temperature when a top dead center is compressed is reduced, the engine combustion rate is reduced, detonation of the engine is avoided, thus, the methanol substitution rate of the engine can be increased, a double-fuel combustion region is expanded, the thermal efficiency of theengine is improved, and NOx and particulate emission of the engine are reduced.

The invention relates to an early-stage and later-stage cultivation method for enokitake fruiting. The method comprises the following steps: fungus bottles which are in a stage after inoculation and before a heat emitting stage are cultivated in an early-stage cultivation room, and the indoor environment is set according to the conditions that the temperature is in a range of 18-20 DEG C, the humidity is larger than or equal to 64%, and the ratio of carbon dioxide concentration to air change frequency is lower than or equal to 2100 ppm; and the fungus bottles which are in a stage entering theheat emitting stage and before mycelium stimulation are cultivated in a later-stage cultivation room, and the indoor environment is set according to the conditions that the temperature is lower than or equal to 20 DEG C, the humidity is larger than or equal to 80%, and the ratio of the carbon dioxide concentration to the air change frequency is lower than or equal to 3100 ppm. According to the invention, the method of early-stage and later-stage separated cultivation is adopted, so that the purposes of shortening and stabilizing the fungus fruiting period and reducing the pollution rate and fungus killing rate are achieved through separately controlling the parameters of the cultivation steps in a hypha recovery stage after the inoculation and the hypha rapid growth stage in the heat emitting stage.