56results about How to "Stop dripping" patented technology

The invention relates to a conductive screening material, in particular to a conductive low-smoke zero-halogen flame retarding and oil resisting cable sheath material and a preparation method thereof. The conductive screening material comprises the following basic components: 100 parts of ethylene-vinyl acetate rubber, 50-100 parts of magnesium hydroxide, 50-80 parts of conductive black, 10-30 parts of graphite powder, 5-10 parts of zinc borate, 10-25 parts of plasticizer, 2-5 parts of lubricant, 1-2 parts of antiager, 10-30 parts of flame retarding synergist, 2-3 parts of vulcanizer and 1-2 parts of vulcanization assistant. The preparation method comprises the four steps of material preparation, mixing, extrusion and tabletting. The conductive low-smoke zero-halogen flame retarding and oil resisting cable sheath material has the advantages of high conductivity, good oil resistivity, excellent flame retarding effect, no peculiar smell, easy stripping and high heat resistance level, and can pass the environment protection authentication of RoHS (Restriction of the use of certain Hazardous Substances Registration), REACH (Evaluation, Authorization and Restriction of Chemicals) and the like.

The invention relates to an aluminum-plastic compound board sandwich layer material, in particular to a material special for a level-A fire-proof aluminum-plastic board core and a preparation method thereof. An inorganic flame retardant, i.e., magnesium hydroxide is taken as a flame retardant, and a high filling technology is adopted. Aids such as a coupling agent, a dispersing agent, a high-molecular compatilizer and the like are used for performing modification pretreatment on magnesium hydrate, so that the magnesium hydrate flame retardant has superior performance, the filling amount of the flame retardant in a substrate is up to 80-90 percent by weight, which is much higher than the adding amount of a flame retardant of the same type of products, the oxygen index of the product is remarkably increased in comparison to that of the same type of products, and the flame-retarding environmental protection performance is improved remarkably. An aluminum-plastic board core material prepared by adopting the method has the characteristics of freeness from halogen, low thermal value, low smoke, flame retardance, drop resistance, nontoxicity and freeness from pollution.

The invention discloses a P-N expanded reaction type flame retardant p-(carboxyphenyl-amino)-(carboxyphenyl-amidoethyl) phenylphosphine oxide and a preparation method thereof. The preparation method comprises the following steps: (a) adding a p-aminobenzoic acid solution into glacial acetic acid; (b) adding triethylamine and mixed solution obtained in the step (a) into a 2-carboxethylphenyl hypophosphorous acid solution, stirring at a high speed and reacting for 2 hours, raising the temperature to 80 DEG C, reacting for 4 hours, cooling, hydrolyzing, performing suction filtration, washing and drying to obtain white powder, namely the P-N expanded reaction type flame retardant. The defects that harmful gases are generated by general flame retardants, the environment is polluted, fuming is caused and the mechanical property is influenced are overcome, the P-N expanded reaction type flame retardant has double-carboxyl end groups, effective flame retardant components are bonded to a PA66 main chain, an inherently flame retardant effect is achieved, and the flame retardant has the advantages of harmlessness, smoke inhibition, high efficiency, environmental friendliness and the like.

The invention discloses a device and a method for removing emulsion on surfaces of cold-rolled steel strips. The device comprises an upper working roller, an upper support roller seam purging mechanism, a steel strip upper surface emulsion sealing mechanism, an upper working roller surface emulsion removing mechanism, a steel strip lower surface emulsion removing mechanism, a steel strip upper surface purging mechanism and an upper support roller surface emulsion removing mechanism. The method is mainly characterized by reasonably controlling the sequence of opening and closing an emulsion injecting system and an emulsion removing device; a plurality of removing methods synergistically cooperate to form a whole body; the effect of removing the emulsion on the surfaces of the steel strips on the outlet side of a rolling mill is further improved; meanwhile, the residues of the emulsion in special parts of heads, tails, sides and the like of the steel strips can be removed; the surface quality of the finished steel strips can be improved.

The invention relates to a filtration unit for kitchen extraction hood, comprising a first filter element (11) and a collecting container (14) provided under the first filter element (11); wherein the filter face (112) of the first filter element (11) is a housing shrinking downwards; lower edge (111) of the first filter element (11) is a drain region; and the filter face (112) is a first intake region. The filtration unit is characterized that the filtration unit (1) includes a second intake region (131) separated from the first intake region by the drain region (111).

The invention relates to an ice maker, the ice making mechanism of which is provided with an ice-making barrel body. A water inlet and an ice outlet pipe which are communicated with the cavity of the barrel body are arranged on the ice making barrel in a connection way; and an evaporator is arranged outside the ice-making barrel body. An ice-crushing mechanism is provided with a reamer which is rotatably and perpendicularly positioned inside the ice-making barrel body with the upper end and the lower end of the reamer forming sealing together with the upper part and the lower part of the ice-making barrel body. The ice maker is provided with a reversible reduction synchromotor with the output shaft being coaxially connected with the reamer. The ice-making barrel body is provided with a shovel plate that can be passed through by the reamer. The shovel plate is provided with a helical arc segment and an upright ice-blocking face which is arranged at an ice outlet. As the shovel plate is provided with the upright ice-blocking face at the ice outlet, the ice squeezed by the screwing of the reamer can be blocked by the ice-blocking face and then the ice is squeezed to the ice outlet, therefore the exiting of ice can be achieved. Simultaneously, the upright ice-blocking face can also achieve the exiting of ice reliably when the motor power is reduced.

A preparation method of boron-containing flame retardant belongs to the technical field of preparation of materials and includes: drying main components including boric acid, saccharides and silica sol by atomizing and obtaining novel flame retardant which is excellent in flame retardancy, smoke suppression, carbonization and molten dropping suppression capability. The flame retardant is adjustable in thermal weightlessness rate, the maximum thermal weightlessness rate can reach 40%, and the molten dropping suppression capability is high. Besides, the flame retardant can be favorably used for high-molecule materials which are low in molecular weight and are easy to be melted to flow during burning.

The invention relates to the technical field of stone paper making and in particular to a method for preparing light high-strength stone paper. The method comprises the following steps: firstly, boiling crushed straw with alkali and absolute ethyl alcohol so as to improve fiber plasticity and implement hydroxylation modification on a fiber; secondly, preparing polyhydroxy fiber bundles through frost wedging action together with ball milling; by taking the polyhydroxy fiber bundles as a deposition core mold plate, generating nano-grade hydrotalcite granules by using a hydrothermal method, enabling the nano-grade hydrotalcite granules to adhere to the surfaces of the polyhydroxy fiber bundles, and adding potassium rhodanate and ammonium oxalate in the hydrothermal reaction, wherein the ammonium oxalate is firstly heated and decomposed into oxalic acid and ammonia gas, under the action of the potassium rhodanate, metal ions in hydrotalcite leave original crystal lattice positions and enter an oxalic acid organic phase, then cavities are formed in the hydrotalcite crystal lattice, and the adsorption activity of the hydrotalcite is improved; finally performing calcining so as to removethe polyhydroxy fiber bundle core and hollow nano hydrotalcite with high adsorption activity, and finally commixing the hollow nano hydrotalcite with polyethylene, thereby obtaining the light high-strength stone paper.

The invention discloses a flame retardant and a wood-plastic composite material, the flame retardant having a three-layer structure; the flame retardant comprises a shell, a middle layer and an innercore, wherein the component of the shell is aluminum hydroxide, the component of the middle layer is hydrated zinc borate, and the component of the inner core is magnesium hydroxide; the particle diameter D50 of the flame retardant is less than 60 nm, and the particle diameter D90 of the flame retardant is less than 100 nm; the inner core is connected with the middle layer through an adhesive, andthe middle layer is connected with the outer shell through an adhesive. Since the flame retardance is conducted in a gradient progressive mode, wherein aluminum hydroxide plays a role in flame retardance at the temperature of 200 DEG C, when the temperature is still increased, zinc borate hydrate is subjected to thermal decomposition at the temperature of 300 DEG C, crystal water is released, andflame retardance is achieved. When the temperature is further increased, the magnesium hydroxide can achieve flame retardance at 340-490 DEG C, so that the flame retardance effect is improved throughcontinuous gradient progressive flame retardance.

The invention discloses a P-N intumescent flame retardant and a preparation method thereof. The P-N intumescent flame retardant is poly2, 2-bis(4-para-aminobenzoic acid-phenylphosphine oxide phenyl)propane. The preparation method includes: (a) adding a solvent glacial acetic acid, a catalyst aluminium trichloride, phenylphosphonic dichloride and bisphenol A into a flask in order to react for 4h; (b) dissolving para-aminobenzoic acid in glacial acetic acid to form a mixed solution, then adding the solution obtained in step a, firstly raising the temperature to 90DEG C and conducting high speed stirring reaction for 4h, then further raising the temperature to 130DEG C, and performing high speed stirring reaction for 2h; and (c) subjecting the reaction product obtained in step b to cooling, hydrolysis, alkali washing, water washing, suction filtration and drying so as to obtain white powder, i.e. the P-N intumescent flame retardant. The P-N intumescent flame retardant provided by the invention overcomes the disadvantages of generation of harmful gas, environment pollution, fuming, influence to mechanical properties and the like of common flame retardants, has double carboxyl terminal group, can key effective flame retardant components to a PA66 main chain to play an essential flame retardant role, and has the advantages of no harm, fume suppression, high efficiency and environmental protection, etc.

The invention relates to a preparation method of a gel dry water fire extinguishing agent, which belongs to the technical field of fire extinguishing materials. The hydrophobic nano silicon nitride powder is used as a raw material; ammonium dihydrogen phosphate, ammonium sulfate, magnesium hydroxide and talcum powder are added; and the gel dry water fire extinguishing agent is prepared; the ammonium dihydrogen phosphate and ammonium sulfate can be decomposed at high temperature; chemical inhibition and side catalysis are carried out on free radicals or active groups generated by fuel in the combustion process, a chain reaction of combustion is interrupted to extinguish fire; the talcum powder is added, so that the stability and the dispersity of the dry water extinguishing agent can be effectively improved; the magnesium hydroxide is decomposed when being heated and absorbs heat on the surface of a comburent; the silicon nitride belongs to an inert substance, is attached to the outsideof the surface of the comburent, prevents the contact between a reactant and a combustion improver, isolates the comburent from oxygen, suffocates and extinguishes the comburent, and the gel dry water fire extinguishing agent has the advantages of favorable dry water flowability, favorable dispersity, no toxicity, no harm, no electricity and no secondary pollution.

The invention belongs to the field of composite flame retardant processing. The invention is characterized in that a magnesium halogen-free flame retardant comprises the following components in percentage by weight: 50-80% of ore type magnesium hydroxide, 1-5% of a surface modifier, 10-30% of a flame retardant synergist, 2-5% of a processing additive and 0-10% of a plasticizer. A preparation process for the magnesium halogen-free flame retardant comprises the steps as follows: adding the weighed surface modifier and magnesium hydroxide into a reactor, controlling the temperature to be 60-110 DEG D, uniformly mixing, adding the raw materials according to the weight ratio, and stirring by a high-speed stirrer to prepare the magnesium halogen-free flame retardant; and 2, diluting the weighed surface modifier through 20-50 parts of ethanol or acetone as a solvent, mixing with magnesium hydroxide in a low-speed kneading machine, heating, adding the raw materials according to the weight ratio, and stirring at a high speed to prepare the magnesium halogen-free flame retardant. The magnesium halogen-free flame retardant is strong in environment-friendly flame-retardant performance, cheap in the raw materials, low in production cost and better in economic and social benefits.

The invention relates to a beverage preparation machine (1), particularly a coffee machine, which comprises two brewing chambers (2, 3) for receiving a beverage substrate (4) for extraction, and a valve (10) for switching a liquid supply to the individual brewing chambers (2, 3), said valve (10) being a membrane valve and comprising an inlet opening (12) for the liquid supply, a first outlet opening (14) for the first brewing chamber (2), a second outlet opening (15) for the second brewing chamber (3), and a closing membrane (18).

The invention relates to the technical field of preparation of flame retardants, in particular to a core-shell type nanosphere flame retardant and a preparation method thereof. According to the invention, orthosilicic acid generated after a reaction of sodium silicate and hydrochloric acid is used as a silicon source, then an alkali and an aluminum source, namely sodium metaaluminate are added, and a hydrothermal process is performed so as to synthesize nanoscale aluminosilicate zeolite powder; potassium thiocyanate and citric acid are added in the process of a hydrothermal reaction, and underthe action of potassium thiocyanate and through the chelating performance of citric acid, metal ions in the nanoscale zeolite powder leave original crystal lattices and enter a citric acid organic phase, so holes are generated in the original crystal lattices of the nanoscale zeolite powder, which enables the physical and chemical activity of the nanometer zeolite powder to be improved and the adsorption performance of nanoscale zeolite to be enhanced; then, the nanoscale zeolite powder and phosphoric acid are subjected to a mixed reaction, so the core-shell type nanosphere flame retardant isfinally prepared. The core-shell type nanosphere flame retardant has excellent flame retardant effect and good application prospects.

The invention discloses a device for detecting the liquid leakage of a liquid cooling pipe of a server, and the device comprises the following parts: a flexible printed circuit board which wraps the liquid cooling pipe, wherein the inner layer of the flexible printed circuit board is provided with an exposed power line and an exposed signal line, and the power line and the signal line are arrangedat an interval; and a main board which is connected with the plurality of flexible printed circuit boards through cables, wherein the main board comprises a CPLD, and the CPLD is configured to receive signals from the plurality of flexible printed circuit boards about the conduction state between the power lines and the signal lines, judge whether the signals are abnormal or not, and turn off theserver power supply in response to the abnormity in the signals. According to the scheme provided by the invention, a liquid cooling pipe is wrapped by the flexible printed circuit board, the leakedliquid is effectively prevented from dropping to the main board, the detection of the leaked liquid of the board card is realized by utilizing the exposed signal wire of the inner layer of the flexible printed circuit board, the number of cables and fixing structural members in the server is reduced, and the wiring of the cables in the server is facilitated.

The invention provides a method for preparing a composite flame retardant from ardealite. The method comprises the following steps: S1, preparing gypsum particles; S2, preparing slurry; S3, performing material wrapping; S4, filtering; S5, drying; S6, placing at low temperature; S7, performing circular treatment; and S8, obtaining the finished product. According to the invention, the composite flame retardant is prepared by compounding the mixed slurry outside the gypsum particles for multiple times, so that the phosphogypsum can be further utilized, the stockpiling amount of the phosphogypsum can be reduced, and the cost of the flame retardant can be effectively reduced on the premise of not reducing the flame retardance; and a wrapping layer outside the prepared composite flame retardant is decomposed when heated to absorb heat on the surface of comburent, the surface temperature of the synthetic material filled with the wrapping layer in flame is reduced, meanwhile, a large amount of water is released to dilute oxygen on the surface of the comburent, active oxide generated through decomposition is attached to the surface of the comburent, combustion is further prevented, and the temperature of the gypsum particles inside cannot be excessively increased and harmful substances cannot be generated.

The invention discloses a filling head for a liquid filling machine. The machine comprises a main body, an air cylinder and a filling needle cylinder. A connector is arranged at the upper end of the main body, the bottom end of the air cylinder is in threaded connection with a connecting flange, a water inlet pipe is arranged on one side of the main body, and a connecting block is arranged at thebottom end of the main body. A placing groove is formed in one side of the interior of the connecting block, and a limiting groove is formed in the other side. A rotating shaft is arranged at the topend of the placing groove, a leakage-proof plate is rotatably connected to the surface of the rotating shaft, and torsional springs are arranged in the middles of the surfaces of the rotating shaft and the leakage-proof plate. According to the filling head for the liquid filling machine, the main body is connected with the filling needle cylinder through the connecting block, when the filling headstops working at the moment a filling bottle body is filled up, the leakage-proof plate rotates upwards under the action of elastic force of the torsional spring, the top end of a limiting groove isclamped by a floor, a filling channel is closed, and residual liquid is prevented from dripping when filling is stopped, so that material waste is reduced, and equipment is protected from being polluted by the residual liquid.