48results about How to "Inhibit flammability" patented technology

The invention is a kind of heat reservoir of heat storage pump air conditioner device, which is made up of bleak lead and olefin compound phase change heat storage material, a spiral plate pipe heat exchanger whose surface has petal fins and cylinder container. The spiral plate heat exchanger is set in the cylinder container, the black lead and the olefin compound phase change material are filled in the container space out of the spiral plate heat exchanger, the cooling media flows in the pipes of the exchanger, and carries on heat exchanging with compound phase change heat storage material through the pipe walls and the fins, it realizes the storage and the release of the heat quantity. The black lead and the olefin compound phase change heat storage material are the standard phase change material; it maintains solid state when carrying on phase change, it has no liquid leakage problem. The heat conducting efficiency is high.

An aqueous fire sprinkler fluid containing low carbon number carboxylate salts for freezing point depression is described. The salts may be used in conjunction with glycols. The salts decrease the combustibility of the glycol containing fluids and give lower viscosity than higher glycol fluids, both benefitting fire sprinkler systems. These salt solutions are friendly to metal and CPVC pipes and are thus useful for fire sprinkler systems by not causing environmental stress cracking of the CPVC components and not being corrosive to the metal parts.

The invention discloses intumescent flame retardant polybutylene succinate and a preparation method thereof, which are characterized in that 80 to 85 percent of polybutylene succinate and 15 to 20 percent of intumescent flame retardant agent as well as 0 to 3 percent of synergist are added to an internal mixer to be cut, melt down and blended to obtain the product. Pictures of a high-resolution transmission electron microscope show that nano-grade dispersion is formed in the Polybutylene succinate basal body; the oxygen index reaches 40 and passes through the vertical burning test standard UL-94V0 grade; the initial thermal decomposition temperature is 321 DEG C, the maximum thermal decomposition temperature is 353 DEG C, and the residual quality score is 11.6 percent at the temperature of 700 DEG C; the pictures of the carbon layer shows that a compact intumescent carbon layer is formed, and a plurality of complete bubbles are formed. The intumescent flame retardant polybutylene succinate can be used for the foaming materials and the packing materials of the toy, household appliance, daily chemicals, food and medicines.

When it is determined that an engine operating condition is in a high-engine load HCCI range (A2) where an engine load is higher than a specified load X1 within a HCCI range A where a compression self combustion is performed, an after-TDC injection F2s is executed at a point T1 when an internal pressure of a combustion chamber drops below a specified pressure Y after the top dead center of an exhaust stroke during a minus valve overlap period NVO during which intake and exhaust valves are both closed. Then, a main injection F2m as a main injection is executed. Accordingly, any improper detonation or deterioration of NOx emission which may be caused by the compression self-ignition combustion in the range where the engine load is relatively high can be prevented.

The invention provides a modifying material pipe of nano porcelain super-high molecular weight polyethylene and a preparation process thereof. The modifying material pipe is formed by the following components with parts by weight: 75-125 parts of polyethylene with super-high molecular weight, 1-6 parts of polyethylene wax, 0.5-3 parts of graphite, 1-8 parts of nano porcelain powder, 0.5-3.5 parts of antistatic agent and 1-4 parts of fire retarding agent. The process comprises the following steps of conducting proportioning, mixing, heating, extruding, shaping pipe parison, stretching pipe parison in two ways, cooling, shaping and cutting, then shaping, and then cutting, thereby obtaining the modifying material pipe of nano porcelain super-high molecular weight polyethylene. The modifying material pipe has the advantages of small raw material consumption, low cost, extremely high abrasion resistance, excellent self-lubricating property, super strong impact strength, wonderful fire-retardant and extremely strong free viscosity, and can prevent static and resist aging and corrosion.

The invention provides an anti-deviation friction disc made of an ultra-high molecular weight polyethylene material and a preparation method thereof. The ultra-high molecular weight polyethylene material used by the anti-deviation friction disc comprises the following compositions by weight portion: 50 to 150 portions of ultra-high molecular weight polyethylene, 2 to 6 portions of tissuemat E, 1 to 3 portions of graphite, 5 to 15 portions of glass hollow microbeads, 2.5 to 7.5 portions of a flame retardant, 0.3 to 1.9 portions of a coupling agent, 0.1 to 0.5 portions of a nucleating agent and 0.5 to 3.2 portions of an antioxidizer. The preparation method comprises the following steps of batching, mixing, heating, hydraulic pressing, cooling, demolding and forming. The material has high wearing resistance, good self-lubricity, super shock strength, good fire resistance, super inadhesion, age resistance and corrosion resistance, and is mainly applied to the manufacture of the friction aligning idler anti-deviation friction disc.

A spark plug for an internal combustion engine is provided, which includes a housing, an insulation porcelain, a center electrode and a ground electrode. At least one of a tip portion of the center electrode and an opposing portion of the ground electrode is provided with a projection portion. At least one of the projection portions has a cross section perpendicular to the axial direction of the plug, the cross section having a minimum curvature radius portion and being in a specific shape that satisfies a predetermined requirement. The requirement is that, when a first straight line, a first line segment and a second straight line are provided, and when the cross section is divided into a first region and a second region by the second straight line, the second region has an area larger than the area of the first region.

According to one embodiment of the invention, a system for curing a composite material includes an oven having an inner wall defining an inner chamber, an outer wall defining an outer chamber between the inner wall and the outer wall, a hot air distribution manifold disposed within the inner chamber, a cold air distribution manifold disposed within the outer chamber, and an exhaust chimney having a cold air distribution conduit disposed therein coupled to the outer chamber. The system further includes a hot air supply system coupled to the hot air distribution manifold of the oven that is operable to supply hot air to the hot air distribution manifold, a cold air supply system coupled to the cold air distribution manifold and the cold air distribution conduit that is operable to supply cold air to them, and a plurality of hot air exhaust passages formed in the inner wall of the oven. The hot air exhaust passages are adapted to transport hot air within the inner chamber to the outer chamber.

Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.

The invention discloses a nano-modified sodium acetate trihydrate phase change heat storage material and a preparation method thereof. The material is composed of, by mass, 90-99 parts of sodium acetate trihydrate, 0.5-2 parts of nano-particles, 0.5-2.5 parts of cellulose and 5-10 parts of graphite, wherein the nano-particles are at least one or a composition of neutral particles and polar particles, the nano-particles do not chemically react with water, and the average particle size of the nano-particles is smaller than 50nm. The phase change temperature is 54-58 DEG C, the degree of supercooling is less than 4 DEG C, and the latent heat of phase change is more than 200kJ / kg. The nano-particles are adopted for modification, the thermal cycle stability of the sodium acetate trihydrate phase change material is improved, and no thermal performance attenuation exists after the material is subjected to 800 times or more of heat charging and discharging cycle tests. The phase change material is green and environmentally friendly, the preparation method is simple, batch production is easy to achieve, stable access of heat is facilitated, and the heat conversion efficiency is improved.

A heat-generating composition is produced by blending magnalium (A1), an oxidizing agent (B), at least one binder (C) selected from a cellulose-based water-soluble polymer and a vinyl-based water-soluble polymer, and a solvent containing water as a main component, and drying the mixture thereof. The heat-generating composition has a water content ratio of not higher than 1.0% by mass.

According to one embodiment of the invention, a system for curing a composite material includes an oven having an inner wall defining an inner chamber, an outer wall defining an outer chamber between the inner wall and the outer wall, a hot air distribution manifold disposed within the inner chamber, a cold air distribution manifold disposed within the outer chamber, and an exhaust chimney having a cold air distribution conduit disposed therein coupled to the outer chamber. The system further includes a hot air supply system coupled to the hot air distribution manifold of the oven that is operable to supply hot air to the hot air distribution manifold, a cold air supply system coupled to the cold air distribution manifold and the cold air distribution conduit that is operable to supply cold air to them, and a plurality of hot air exhaust passages formed in the inner wall of the oven. The hot air exhaust passages are adapted to transport hot air within the inner chamber to the outer chamber.

Provided is an ionic composition comprising an ionic liquid and a polyether compound having cationic groups. According to the present invention, it is possible to provide the ionic composition which has extremely low vapor pressure and therefore suppressed flammability, and which has excellent low-temperature properties.

The invention mainly relates to the technical field of furniture board processing, and discloses a preparation method of a high-strength environment-friendly antibacterial straw board. The preparation method comprises the following steps of straw cleaning, straw fermentation, straw drying, raw material mixing, primary hot pressing, board maintenance, secondary hot pressing and post-treatment; andaccording to the preparation method of the high-strength environment-friendly antibacterial straw board, the board is prepared by taking a straw as a main raw material, waste materials are changed into things of value, the environment is protected, the raw material sources are wide, the price is low, the production cost of the board is reduced, the prepared board is high in strength, does not contain formaldehyde, is effectively antibacterial and anti-mildew, improves the processing performance and the service life of the board, and enlarges the application range of the straw board.

The invention is a kind of heat reservoir of heat storage pump air conditioner device, which is made up of bleak lead and olefin compound phase change heat storage material, a spiral plate pipe heat exchanger whose surface has petal fins and cylinder container. The spiral plate heat exchanger is set in the cylinder container, the black lead and the olefin compound phase change material are filled in the container space out of the spiral plate heat exchanger, the cooling media flows in the pipes of the exchanger, and carries on heat exchanging with compound phase change heat storage material through the pipe walls and the fins, it realizes the storage and the release of the heat quantity. The black lead and the olefin compound phase change heat storage material are the standard phase change material; it maintains solid state when carrying on phase change, it has no liquid leakage problem. The heat conducting efficiency is high.

The invention discloses a telescopic dust suction system and an implementation method thereof. The telescopic dust suction system comprises a cage type telescopic frame group, a dust suction cover, ahigh-temperature-resistant telescopic pipe and a dust suction pipeline, wherein the high-temperature-resistant telescopic pipe is connected with dust suction ends of the dust suction cover and the dust suction pipeline; a dust removal system is connected to a conveying end of the dust suction pipeline; the high-temperature-resistant telescopic pipe is sleeved in a cavity of the cage type telescopic frame group; and the dust suction cover is connected with the cage type telescopic frame group. The telescopic dust suction system has the following advantages that an air cylinder is adopted to replace an oil cylinder, so that the flammability of oil is avoided, the telescopic dust suction system can work under the inflammable environment, and the multi-cylinder cost is saved; with the double-acting air cylinder, power is provided for telescoping, so that the lifting movement of a suspended load and a cage type frame inner cavity load is realized; and through a telescoping function, a reasonable distance is kept between the dust suction cover and a furnace cover, so that a best dust suction effect is achieved.

The invention relates to a device for inhibiting inflammability of Shenfu coal by adopting magnesium hydroxide nanoparticles. According to the device, porous inclined plates arranged in a staggered manner are arranged in an adsorption furnace, so that coal granules slide along the inclined plates, and retention time of the coal granules in the adsorption furnace is prolonged. Meanwhile, after airis preheated to a certain temperature by adopting an air heater, the magnesium hydroxide nanoparticles are mixed with hot air under vacuum take-off of a venturi tube and then fed into the adsorption furnace. When hot airflow and the coal granules are mutually contacted to be dehydrated so as to form air gaps, the nanoparticles are adsorbed into the pores of the coal granules, so that a spontaneousignition point of the Shenfu coal is improved so as to inhibit the inflammability, and the coal can be conveniently and safely stored for a long time. The device is low in cost, energy-saving, environmental-friendly, compact in structure, safe and reliable.

The invention relates to powdered cation borate with a small grain size and low water solubility. The powdered cation borate and a suspension produced therefrom are suitable, for example, for the finishing of coating substances (such as wood preservatives), in particular fungicidal, biocidal and insecticidal finishing.

The invention discloses a preparing method of a polysulfide rubber sealing ring. The preparing method comprises the steps of 1, weighing raw materials, wherein liquid polysulfide rubber, propionate, epoxy groups, bisphenol-A epoxy resin, a plasticizer, a tackifier, a softener, a reinforcing agent, a flame retardant, a vulcanizing agent and a filler are weighed according to the following mass fraction; 2, modifying the liquid polysulfide rubber, wherein after the polysulfide rubber is subjected to end-capped modification through the propionate and the epoxy groups, modified polysulfide rubber is obtained; 3, pretreating the raw materials, wherein after the plasticizer is added into the liquid modified polysulfide rubber, plastifying is conducted on an open mill; 4, preparing a premix material, wherein the tackifier, the softener, the reinforcing agent, the flame retardant and a sizing material are uniformly mixed in a mixing mill, and then the filler and the vulcanizing agent are addedto continue mixing; 5, conducting vulcanization molding, wherein a mixed rubber compound is added into a mold of vulcanization equipment for vulcanization to obtain a vulcanized sealing ring green body; 6, conducting ageing resistance and trimming treatment.

The invention provides a foam melamine thermal insulation board. The foam melamine thermal insulation board comprises melamine resin thermal insulation layers (1), barrier boards (2) and foam layers (3), wherein the melamine resin thermal insulation layers (1) adopt double-layer structures and have the same thickness; each melamine resin thermal insulation layer (1) is bonded with one foam layer (3) correspondingly, and the two foam layers (3) have the same thickness; the surface layer of each foam layer (3) is bonded with one barrier board (2) correspondingly, and the two barrier boards (2) have the thickness. The inflammability of the thermal insulation board is effectively eliminated by changing the material of the thermal insulation layers in the thermal insulation board, and the thermal insulation board is good in flame retardant effect, good in toughness, resistant to water, heat and chemical corrosion, small in self-weight, simple to produce and convenient to use.

The invention relates to a halogen-free flame-retardant PA6 composite material which comprises the following components in percentage by mass: 66%-90% of a PA6 base material, 9%-25% of a compound halogen-free flame retardant, 0.1%-2.0% of a main antioxidant, 0.2%-4.0% of an auxiliary antioxidant and 0.7%-3.0% of a lubricant, wherein the compound halogen-free flame retardant is prepared from a hypophosphite-cyclotetrasiloxane double-base synergistic compound and a nitrogen flame retardant together. Hypophosphite-cyclotetrasiloxane double groups are used for cooperation, the flame retardant hasextremely good charring performance and an excellent flame retardant effect, the addition amount of the halogen-free flame retardant can be greatly reduced, the compatibility problem of the flame retardant and a matrix is improved, and the mechanical property of the matrix can be enhanced due to the existence of a Si crosslinking structure contained in a siloxane group so that adverse effects caused by the addition of the flame retardant are further counteracted; the halogen-free flame-retardant PA6 composite material has the advantages of high flame-retardant efficiency, no halogen, low smoke, low toxicity, dripping resistance and excellent processability and is widely applicable.

The invention belongs to the technical field of flame-retardant paper preparation, and particularly relates to a simple, convenient, efficient and environment-friendly preparation method of flame-retardant office paper. The preparation method comprises the following specific steps: S1, synthesizing a flame retardant; and S2, carrying out flame retardant treatment on the paper, namely adding the flame retardant powder obtained in the step S1 into deionized water by adopting a dipping container and drying equipment to prepare finishing liquid, putting the finishing liquid into a dipping container, then, guiding raw paper into the dipping container at the room temperature, smoothly impregnating the raw paper with the finishing liquid for 15 seconds, and then, drying the impregnated raw paper in drying equipment to obtain the flame-retardant office paper. The efficient and environment-friendly office paper flame retardant is successfully synthesized by taking phytic acid and citric acid as main raw materials. The flame retardant property of the A4 office paper is improved through dipping and drying processes. The problem of flammability of the paper is effectively inhibited, and the printing effect and the physical properties of the paper are hardly influenced.

The invention discloses a development liquid for TFT-LCD (thin film transistor-liquid crystal display) displaying. The developing liquid is prepared from the following components in parts by weight: 22 to 26 parts of alkaline compound, 7 to 14 parts of nonionic surfactant, 9 to 15 parts of penetrant, and 42 to 54 parts of deionized water. The developing liquid has the characteristics and advantages that the defects of failure to simultaneously realize developing property, defoaming property and dispersion stability and narrow operation temperature range in the use process of the existing developing liquid are overcome; the adding of a defoaming agent is not needed, the developing property is good, the residue content is low, the operation temperature range is wide, the pollution to environment is small, and the like; in the developing preparation technology of light-sensing resin, the important and wide application is realized; the developing property is good, the generation of residues is avoided, the toxicity is low, the flammability is avoided, the management is easy, the treatment of waste liquid is simple and convenient, the cost is low, and the like.

The invention relates to the technical field of bus cables, in particular to a high-rate tensile bus cable. The high-rate tensile bus cable comprises a multi-core wire set, a copper core set and an environmentally-friendly flame-retardant outer sheath, the outermost outer surface of the multi-core wire set comprises a wire set polyethylene insulation thin layer, the inner side of the wire set polyethylene insulation thin layer is covered with a wire set wrapping layer, and the inner side of the wire set wrapping layer is composed of a polyester tape layer, the inner side of the environmentally-friendly flame-retardant outer sheath is coated with a polyurethane layer, solid carbon dioxide powder is directly added in each copper core set and the multi-core wire set to improve the safety of the usage of the wire core, avoid the burning of the protection layer at the internal portion caused by too high temperature due to misuse of the internal copper core wires, improve the fire resistanceof the wire cores when used and improve a certain safety, and an aramid yarn flexible reinforce is added to improve the flexibility of the whole cable in the usage process and improve the tensile effect. The whole practicability is high, and the usage effect is better compared to a traditional mode.

The invention discloses a whole-process automatic tracking dust-removal system for a smelting furnace and a realization method thereof. The whole-process automatic tracking dust-removal system comprises a cage-type telescopic frame set, a dust suction hood, a high-temperature-resisting telescopic pipe, a dust suction pipeline and a rotary support; the high-temperature-resisting telescopic pipe isconnected with the dust suction ends of the dust suction hood and the dust suction pipeline; and the high-temperature-resisting telescopic pipe is sleeved with a cavity of the cage-type telescopic frame set, the dust suction hood is connected with the cage-type telescopic frame set, and the conveying end of the dust suction pipeline is connected with the rotary support. The whole-process automatictracking dust-removal system has the following advantages that a whole-process automatic tracking function is achieved, the optimal dust removal effect is ensured, labor is saved, the misoperation phenomenon is avoided, an oil cylinder is replaced with an air cylinder, thus flammability of oil is avoided, the whole-process automatic tracking dust-removal system can work under the flammable environment, the cost of multiple cylinders is saved, and the double-acting air cylinder has power in extending and retracting, lifting movement of the suspended load and objects loaded on an inner cavity of a cage-type frame are achieved, the reasonable distance can be kept between the dust suction hood and a furnace cover through the telescopic function, and the optimal dust removal effect is achieved.

The invention discloses a conductive carbon nanotube / water-based acrylic resin composite material and a preparation method thereof. The composite material comprises the following raw materials: methylmethacrylate, butyl acrylate, maleic anhydride, 2-ethylhexyl acrylate, acrylic acid, hydroxyethyl methacrylate, glycidyl methacrylate, 2,2-azodiisobutyronitrile, isopropanol, N,N-dimethylethanolamine, deionized water, carbon nanotubes and a silane coupling agent. According to the invention, water-based acrylic resin is synthesized by adopting a homogeneous solution polymerization method; conductivity is improved by adding carbon nanotubes; then the dispersity of the carbon nanotubes in the water-based acrylic resin is improved by adding the silane coupling agent, and the conductivity of the material is further improved; and the conductive carbon nanotube / water-based acrylic resin composite material is prepared. The method is simple, and the prepared material is good in conductivity; and in the preparation process, water and isopropanol are used as solvents, so no organic volatile component is discharged, and the method is safe and environment-friendly.

The invention discloses a nano-modified sodium acetate trihydrate phase-change heat storage material and a preparation method thereof, comprising 90-99 parts of sodium acetate trihydrate, 0.5-2 parts of nanoparticles, and 0.5-2.5 parts of cellulose and 5-10 parts of graphite, the nanoparticles are at least one or more of neutral particles and polar particles, and the nanoparticles do not chemically react with water, and the average particle size of the nanoparticles is less than 50nm. Its phase transition temperature is 54~58°C, the degree of supercooling is less than 4°C, and the latent heat of phase transition is greater than 200kJ / kg. The invention adopts nano particle modification, improves the thermal cycle stability of the sodium acetate trihydrate phase change material, and the material has no thermal performance attenuation after more than 800 charge and discharge cycle tests. The phase change material of the invention is green and environment-friendly, has a simple preparation method, is easy to realize mass production, is beneficial to stable storage and withdrawal of heat, and improves heat conversion efficiency.

The invention provides a composite wood fire retardant for teaching toys, belonging to the technical field of fire retardants. In the flame retardant of the invention, epoxy resin coated ammonium polyphosphate integrates a carbon source and an acid source into one, so the compatibility between the flame retardant and a polymer matrix is improved; a carbon formation promoter improves the carbon formation speed and the carbon formation amount of the flame retardant, so high flame retardant efficiency is obtained; metal compounds consisting of magnesium hydroxide, aluminum hydroxide and ultrafinezinc borate are used as inorganic flame retardants and have the advantages of no toxicity, no harm and no smoke, and through synergism with other components, flame retardant efficiency is improved, the amount of smoke exhausted during the combustion of the flame retardant is reduced, the flammability of the flame retardant is suppressed, and the flame retardant is allowed to only undergo carbonization and not to burn when taking effect. The wood flame retardant of the invention has good flame retarding effect, no toxicity, no smoke, no harm to environment and human beings and good stability.