47results 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.

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.

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 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 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 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 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 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.