491results about How to "Improve mechanical properties" patented technology

The invention discloses a block aerogel composite material and a preparation method thereof. The block aerogel composite material consists of reticular cellulose nano fiber skeletons and sol in a combining way, wherein the porosity of the aerogel composite material is 80-99.5 percent, the density is 0.015-0.680g/cm<3>, the BET specific surface area is 150-1200m<2>/g, the coefficient of heat conductivity is 0.015-0.045Wm<-1>k<-1> and the modulus of elasticity is 0.5-150MPa. The block aerogel composite material provided by the embodiment of the invention has the advantages that since the material consists of the reticular cellulose nano fiber skeletons and the sol in the combining way, the mechanical property of the block aerogel composite material can be obviously improved, the heat conductivity is low, the density is small and the specific surface area is large; and besides, the equipment cost can be decreased by adopting a relatively low and safe freeze-drying method to replace the traditional supercritical drying method.

The invention relates to a polyether-ether-ketone composite material which consists of polyether-ether-ketone, nanoparticles, filling materials and addition agent materials. The composite material comprises 75 to 95 portions of polyether-ether-ketone powders, 5 to 10 portions of the nanoparticles, 10 to 20 portions of the filling materials and 2 to 5 portions of the additive agents by weight. The filling materials are glass fiber, carbon fiber, quartz powder and MoS2 or toner. A method of compression moulding forming adopted is that: materials is prepared according to the formula; materials are mixed: the materials prepared according to designed requirements poured into an automatic material mixing machine for evenly mixing, the mixing time is between 0.5 minute and 3 minutes, then compressing process is carried out, and the blended mixture is sent to a mould cavity for moulding. The material can be used for sealing materials products. Various valve sealing elements produced by the invention has properties of creep resisting, corrosion resistance, heat resistance and pressurization, etc.; the ability of pressurization and wear resistance of the material are improved, and at the same time the cost is lowered by 10 to 20 percent or even higher, thus being beneficial to using and promotion of the materials.

The invention provides a high-performance antibiosis wood plastic composite material and a preparation method thereof, and relates to a composite material obtained by blending surface grafting modification vegetable fiber powder and molding powder. The high-performance antibiosis wood plastic composite material comprises components of modification vegetable fiber powder of which the surface is grafted with various germifuga, recycled molding powder and the like. The various activity antibiosis monomers are grafted on the surface of the vegetable fiber powder by high-energy radiation, so that the antibacterial long residual action and mechanical property of the wood plastic composite material are improved obviously. The high-performance antibiosis wood plastic composite material in the invention is prepared from the components by a general method of fusing and blending in plastic processing. The wood plastic composite material has excellent antibacterial long residual action, and obviously improves the interface of wood and plastic in the wood plastic composite material because of the chemistry grafting modification of the surface of the vegetable fiber, and ensures that the material mechanical property and the water absorbency resistance are improved greatly, and can be applied in the fields of indoor or outdoor decoration, furniture, packaging and the like.

The invention discloses a tool steel roller for rolling a medium-thickness plate and a manufacturing method thereof. The tool steel roller comprises a core part of nodular cast iron, a roller neck and a roller body work layer, wherein the roller body work layer comprises the following chemical components in percentage by weight: 1.60-2.2% of C, 0.50-1.00% of Si, 0.50-1.00% of Mn, 10.00-15.00% of Cr, 0.20-1.80% of Ni, 0.20-1.50% of Mo, 0.20-1.00% of V, less than or equal to 0.03% of S, less than or equal to 0.05% of P and the balance of Fe and unavoidable impurities. According to the tool steel roller and manufacturing method disclosed by the invention, by designing a reasonable alloy composition and processing technology, the mechanical properties of a working roller of a rolling mill are effectively improved, and the wear resistance and millimeter rolling amount of the roller are increased; moreover, the tool steel roller has good hot-crack resistance, and the working efficiency of a medium-thickness plate rolling mill can be remarkably improved.

The invention relates to a function regulation and control structure production method based on continuous fiber composite material 3D printing, computer aided design software is used, according to the profile characteristic of a function regulation and control structure material product, a product three-dimensional model is established, then a corresponding performance analysis is carried out on the product by the computer aided design software, the function regulation and control design is carried out on the key characteristic areas, a fiber track curve is drafted, then the fiber track is subjected to algorithm optimization, the technical means during 3D printing is considered, the fiber track is adjusted to obtain the final fiber track curve, according to the track curve, a 3D printing path instruction file of the product is generated, and the instruction file is introduced into a continuous fiber reinforced composite material 3D printer, and the preparation of the function regulation and control structural material is completed. The method can realize dynamic control of fiber path and content in the composite material, and designability manufacture of the function regulation and control materials such as a variable stiffness fiber composite material, a thermal-conduction controllable material and a electromagnetic controllable material can be completed.

The invention relates to a high-tenacity, halogen-free and flame-retardant fiber glass reinforced polycarbonate composition, which comprises the following components by weight portion: 300 to 800 portions of polycarbonate, 100 to 400 portions of fiber glass, 30 to 150 portions of toughening compatilizer, 10 to 100 portions of organosilicon flame retardant, 10 to 150 portions of nano silicic acid inorganic substances, 1 to 10 portions of antioxidant A, 1 to 15 portions of antioxidant B, 1 to 15 portions of coupling agent, and 0 to 20 portions of other assistants. Compared with the prior art, the composition has the characteristics of good processing property, high impact strength, environmental protection due to free halogen and flame retardance, and the like.

An improve Al-alloy "6063" features that on the basis of original Al-alloy "6063" the mixture of La (0.036-0.14 wt.%) and Ce (0.075-0.06 wt.%) is additionally added to it for improving its mechanical, physical and technological properties.

The invention discloses grafted modified starch slurry. The spinning slurry composition consists of the following raw material components in part by weight: 100 parts of native starch, 1 to 50 parts of grafting monomer and 0.1 to 5 parts of initiator, wherein the grafting monomer is any two of acrylic acid, methyl acrylate, methyl methacrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate and acrylamide; and the initiator is any one or more of ammonium ceric nitrate, potassium persulfate, ammonium persulfate, potassium permanganate and H2O2-Fe<2+>. Compared with the prior art, the invention has the advantages that: binary grafted modified starch is prepared from 100 weight parts of native starch, 1 to 50 weight parts of grafting monomer and 0.1 to 5 weight parts of initiator by a dry method, so that the mechanical property of the starch slurry is obviously improved, the raw materials and energy are saved, and production cost is greatly reduced.

The invention discloses a high-performance natural silk fiber and a preparation method thereof. High-performance silk fiber is formed by taking cocoon silk, raw silk, twisted silk or silk weaving yarn as raw materials and then performing contracting or stretching. The method specifically comprises the steps that inorganic salt, acid and water are mixed according to a certain ratio to prepare a silk swelling solution; the silk fiber is immersed into the swelling solution, and then stretching or contracting is performed; lastly, rinsing with clear water, neutralizing treating and drying are performed to obtain the high-performance natural silk fiber. The preparation method is simple, effective and short in process, the breaking strength of the silk fiber prepared through the method is comparable with that of spider silk, and therefore the high-performance natural silk fiber is suitable for application of the advanced technical fields of artificial ligaments, ophthalmological sutures, protective garments and the like.

The invention discloses a water-cooling apparatus for casting hub mold, wherein, a top mold cooling channel (2) is provided inside a top mold (1), cooling water flows in the top mold cooling channel (2), a cooling column (4) is provided in the wheel center position of the top mold (1), the cooling water is lead in through a cooling channel (3); a cooling channel (5) is provided at the spoke root; a sprue cooling channel (7) is provided at the sprue part of the bottom die (8), and a bottom die cooling channel (6) is also provided on the bottom die (8). The present invention has advantages of improving the working efficiency, improving the mechanical properties, achieving the recycling use of cooling medium and reducing costs.

The invention discloses a preparation method of a refining agent for melting an aluminum alloy section doped with plant ash. The refining agent is prepared from the following materials in parts by weight of 6-8 parts of potassium chloride, 4-6 parts of wood ash coated particles, 3-5 parts of calcium fluoride, 3-5 parts of sodium nitrate, 5-8 parts of graphite powder, 8-10 parts of sodium fluorosilicate, 3-5 parts of sodium sulfate, 5-8 parts of aluminum chloride, 3-5 parts of potassium carbonate, 8-10 parts of attapulgite, 5-8 parts of NaBF4, 3-5 parts of sodium chloride, 5-8 parts of potassium sulphate, 8-10 parts of Na2TiF6, and 5-8 parts of NaF. High-quality aluminum alloy melting liquid is obtained by treatment of the refining agent. Therefore, the aluminum alloy melting liquid is used for casting production; the yield is obviously improved; especially the porosity in a cast is reduced by 1-2 degrees; effective control is carried out; an air hole is not generated at the surface of the cast; trapped oxide is obviously reduced; and oxide inclusion is at about two grades while the mechanical property of the cast is obviously improved.

The invention relates to a hydrophilic double-component grouting plugging material. The hydrophilic double-component grouting plugging material comprises a component A and a component B with a grouting volume ratio of 1: 1-5, wherein the component A comprises the following substances in parts by weight: 100 parts of polyether polyol, 10-50 parts of a plasticizer, 20-60 parts of isocyanate, 0.05-0.3 part of a catalyst, 20-60 parts of a solvent and 0.01-0.05 part of a retarder; the component B comprises the following substances in parts by weight: 100 parts of sodium silicate, 2-5 parts of a cross-linking agent and 0.5-2 parts of a catalyst. The plugging material related to the invention also has the characteristics of environment protection, no pollution, low cost and high dynamic strength besides the properties of great grouting capability, high gelatinizing speed, large water containing quantity and rapid and efficient seepage-proof plugging. The grouting plugging material is suitable for the grouting plugging of various buildings, such as ponds, water towers and basements, and the grouting plugging engineering of various ports, docks, bridge piers, dams and hydropower station curtains.

The invention discloses a technology method used common carbon steel to manufacture mark 460 grade deformed bar. It includes the following steps: adopting common carbon steel; start rolling temperature is ultra-low temperature with 900-980 centigrade degree; pressing; rolling mill maximum elongation coefficient u is 1.449; cooling by pre-passing water segment; its number is 1-3; water pressure is 0.5-0.8Mpa; the cooled temperature is 850-950 centigrade degree; entering fining mill group; main electric machine power is 1350KW; cooling by water passing cooling segment; its number is 2-5; water pressure is 0.8-2.0Mpa; the temperature of cooling bed surface is 580-650 centigrade degree; air cooling; and finishing self tempering. The invention adopts common carbon steel and ultra-low temperature big pressure rolling to reduce production cost, increase corrugated steel bar strength, and economize steel resources.

The invention relates to an application of carbon nanometer tube in polythene fiber composite weft-free cloth, wherein the nanometer particles are two-dimension nanometer carbon tube, as seamless hollow tube surrounded by hexagon carbon atom grid, whose two ends are covered by hemi-spherical large Furehee molecules, while the diameter is from zero-point nanometer to tens nanometers and the length is from several micrometers to hundreds micrometers. And the production comprises that (1) pretreatment of carbon nanometer tube as purifying and organic treatment that refluxing 1-4g carbon nanometer tube/ml and 0.01-0.04g/ml titanic acid coupler in organic solvent for 1-3h, (2) mixing carbon nanometer tube and adhesive for 1-2h at 60-80Deg. C, and defoaming at vacuum, (3) uniformly laying strengthener UHMWPE fiber on a coiler, (4) plating adhesive for 1-2 times and drying at 40-70Deg. C, (5) drying at 60+-3Deg. C for 10-20min. The invention can increase the application temperature of polythene fiber composite weft-free cloth as 10Deg. C, and improve 20% of impact resistance, with better thermal resistance, strength and creep resistance, or the like.

This invention relates to a type of anti-static polychlorovinyl composite material and the method. Compounding include PVC resin, lasticizer, stabilizer, packing matetial. The feature is the formula also includes electric conductive mica, coupling agent of organic titanate and a little of nanometer sliver line power. It uses electric conductive mica and sliver line power which has been processed by coupling agent of organic titanate as the conductive packing material, surface resistivity reach to 106-107omega after film coating. The coupling agent of organic titanate disperses sliver line power well-distributed in PVC resin, solves the problem of agglomeration of nanometer power efficaciously.

The invention relates to a constitution method of a lithium ion battery diaphragm surface supermolecule membrane. Organic and inorganic constitution units with high thermal stability, high mechanical strength and hydrophilic polar functional groups are adopted. An organic-inorganic composite supermolecule membrane is alternatively assembled onto the polyolefin diaphragm surface and the pore inner surface by a layer-by-layer self-assembly method based on molecule interfaces. By fine regulation and control of the thickness, the constitution, the structure and surface characteristics of the supermolecule membrane at the molecule level, the thermal stability, mechanical strength and the ionic conductivity of the diaphragm are improved, thus enhancing the safety and electrochemical properties of the lithium ion battery.

The invention provides an enhanced geopolymer and a preparation method thereof. The preparation method comprises the following steps: preparing the following raw materials: phosphate and/or polyphosphates, meta-kaolin, fly ash, sodium silicate, an alkaline compound, silicon dioxide, and water, mixing the raw materials according to a certain ratio, grinding the mixed raw materials to obtain uniform slurry, injecting the slurry into a mould, and carrying out maintenance at a room temperature or low temperature (20 to 80 DEG C) to obtain the geopolymer. The geopolymer, which is produced by the provided formula and preparation method, has the advantages of high temperature resistant and chemical product resistant properties, and excellent mechanical properties, the compressive strength can reach 150 MPa or more, and the application requirements of construction material and high temperature coating can be met. Compared with the conventional construction material production technologies, the provided preparation method has the advantages of simple technology, energy saving, environment-friendliness, low cost, and easy operation.

The invention discloses a high-anti-slippery abrasion-resistant material for shoes and a preparation method thereof.The high-anti-slippery abrasion-resistant material is prepared from, by weight, 20-40 parts of natural rubber, 20-40 parts of styrene-butadiene rubber, 20-40 parts of butadiene rubber, 15-25 parts of halogenated butyl rubber, 20-30 parts of nanometer calcium carbonate, 10-20 parts of rubber oil, 10-20 parts of white carbon black, 3-8 parts of an activator, 3-5 parts of silicon carbide, 2-4 parts of organic siloxane, 1-5 parts of an accelerant, 1-3 parts of an antiager, 1-3 parts of sulfur and 0.5-1.5 parts of stearic acid.The raw materials required by the prepared high-anti-slippery abrasion-resistant material for the shoes are low in price and easy to obtain, the preparation process is simple, the strength is high, the anti-slippery performance is good, the abrasion-resistant performance and processing performance are excellent, the friction coefficient is 1.4-1.6, the friction volume is 304-315/mm<3>, and the material can be used for production of high-anti-slippery abrasion-resistant shoe soles and other auxiliary materials.

The invention relates to a 2D carbon/silicon-silicon carbide composite material pin preparation method and a preparation method and structure of a 2D carbon/silicon-silicon carbide composite material pin preform. The pin preparation method comprises 1, preparing a preform through horizontal paving (0 degree)-inclined paving (45 degrees) alternative laying of a 2D carbon fabric, graphite mold-based setting and carbon fiber vertical seaming on the multilayer carbon fabric, 2, depositing a pyrolytic carbon protective layer in the preform, 3, carrying out chemical vapor infiltration (CVI) to obtain a silicon carbide base, 4, cutting a flat blank to obtain a strip-shaped pin blank with the square section, 5, carrying out CVI silicon carbide protection of exposed fibers, 6, carrying out reactive melt infiltration (RMI) treatment, 7, milling the pin blank to obtain a pin with a standard size and 8, carrying out examination to obtain a carbon/silicon-silicon carbide composite material pin finished product. Through combination of CVI and RMI, the preparation method has the advantages of low production cost, short production period, low product porosity, high density and batch production. The ceramic-based composite material prepared by the CVI and RMI has shear strength of 80-100MPa at the room temperature.

The invention belongs to the production field of mixed dry mortar, and discloses a desulfurized ash residue mixed dry mortar which is prepared by the raw materials in parts by weight: 100-280 parts of cement, 50-100 parts of desulfurized ash residue, 650-800 parts of fine aggregate, 10-25 parts of water-retaining thickening material, 0.5-1.0 part of early strength water-reducing agent, 0.2-0.3 part of foaming agent and 1.0-1.5 parts of accelerator. As the desulfurized ash residue is adopted as raw material to produce the mixed dry mortar, the mechanical property of the mixed dry mortar is improved, the production cost of the mixed dry mortar is greatly reduced, a good method is provided for the cyclic utilization of a great deal of industrial residue, and the aim of comprehensive utilization of waste can be achieved; and the desulfurized ash residue mixed dry mortar is environment-friendly, thus being in accordance with the requirement of sustainable development.

The invention belongs to the technical field of metallurgy, and particularly relates to a non hardened and tempered state hot-rolled steel strip with yield strength higher than 900MPa and a preparation method of the hot-rolled steel strip. The non hardened and tempered state hot-rolled steel strip comprises the chemical components in percentage by weight: 0.06-0.12% of C, 0.10-0.30% of Si, 0.80-1.20% of Mn, 0.00-0.04% of Nb, 0.00-0.04% of V, 0.02-0.10% of Ti, 0.8-1.20% of Cr, 0.10-0.30% of Mo, 0.001-0.003% of B, less than 0.012% of P, less than 0.01% of S, and the balance of Fe, and has the yield strength not less than 900MPa, tensile strength not less than 940MPa, and elongation at break not less than 12%. The preparation method comprises the steps of: smelting molten steel according to the set components, casting into cast blank, heating the cast blank, carrying out rough rolling and finish rolling, cooling the steel strip to 200-450 DEG C after finish rolling, coiling, carrying out hot rolling, carrying out offline tempering at the tempering temperature of 400-600 DEG C, and delivering in the hot-rolled state or hot-rolled and offline tempered state. According to hot-rolled steel strip provided by the invention, the hardening and tempering heat treatment process is not needed, so that the production cost is greatly lowered.

The invention discloses a method for preparing a fire retardant modification timber. The method comprises the following steps of: (1) adding a fire retardant into a urea formaldehyde resin concentrate to obtain a timber impregnation liquid after the fire retardant is completely dissolved; (2) making the impregnation treatment of the timber to be treated by using the vacuum pressure method and the timber impregnation liquid obtained in the step (1); and (3) drying the timber to be treated to obtain the fire retardant modification timber. In the method, the fire retardant is directly added into the urea formaldehyde resin concentrate to form the impregnation liquid, so that by one-time impregnation treatment, the use performance of the timber is improved, the fire retardant effect is enhanced, the process for modifying the timber is simplified, and other steps which are needed after the timber modification to realize the fire retardant function are saved. The method has the advantages of simple process and unnecessary complex equipment; and when the method is adopted to treat the timber, the size stability of the treated timber is obviously improved, the physical and mechanical properties are obviously improved, the weight gain rate of the timber is between 25 and 50 percent, and the oxygen index is increased by 40 to 80 percent.

The invention discloses a high-efficiency core-making method for blowing and hardening water glass sand. The original sand, water glass for casting and non-crystalline silicon oxide are mixed by a sand mixer to obtain a core sand mixture, and then the mold-making The core sand mixture is filled into the mold by a core shooter or manually, and the CO blowing is used to ₂ CO ₂ The gas is blown into the cavity of the mold for blowing hardening, the blowing pressure is 0.1-0.4Mpa, the blowing time is 5-200s, and CO blowing ₂ After the gas is finished, replace the compressed air, blow the compressed air into the mold cavity, the blowing pressure is 0.1-0.4Mpa, blow the compressed air for 10-200s, and the mold is ejected after the blowing is completed. The present invention can solve the problem of water glass sand blowing CO ₂ The overblowing problem of the method can be solved, and the added amount of water glass can be reduced by more than 50%, and the mechanical properties of the manufactured core can be significantly improved at the same time.

The invention discloses a dissimilar material brazing method of a porous intermediate layer structure brazing seam, relates to the field of welding of materials, and aims to solve the problems that great residual stress can be easily generated by a connector in the existing brazing process of the dissimilar material, the mechanical property of the connector is greatly reduced, even the connected connector is damaged. The method comprises the following steps of grinding and removing impurities on a ceramic matrix composite material and a metal material, then uniformly mixing a nanometer aluminum oxide template with a brazing filler to obtain a composite porous intermediate layer brazing filler, sequentially stacking the ceramic matrix composite material and the metal material, subsequently putting the composite porous intermediate layer brazing filler between the to-be-welded surfaces of the ceramic matrix composite material and the metal material to obtain a to-be-welded part; putting the to-be-welded part in a vacuum brazing furnace, vacuumizing, preserving heat at the high temperature, and finally cooling to the room temperature, thus completing the dissimilar material brazing process of the porous intermediate layer structure brazing seam. The method is suitable for brazing the dissimilar material of the porous intermediate layer structure brazing seam.

The invention discloses a hydrolysis-resistance alcoholysis-resistance glass fiber reinforced PPA (phenyl-propanolamine) material and a preparation method thereof. The hydrolysis-resistance alcoholysis-resistance glass fiber reinforced PPA material consists of the following components in percentage by weight: 46 to 76 percent of polyphthalamide resin, 20 to 50 percent of glass fibers, 0.3 to 0.6 percent of heat stabilizer, 0.2 to 0.4 percent of alcoholysis-resistance protective agent, 0.1 to 0.3 percent of hydrolysis-resistance protective agent, 0.4 to 0.8 percent of polarity OP (oxidized polyethlene) wax, 0.1 to 0.3 percent of nucleating agent and 1.0 to 2.0 percent of black color masterbatch. The reinforced PPA material disclosed by the invention not only has excellent mechanical property, but also has excellent hydrolysis-resistance and alcoholysis-resistance characteristics. When the hydrolysis-resistance alcoholysis-resistance glass fiber reinforced PPA material is soaked in hot water and ethylene glycol solution for a long time, over 80 percent of mechanical property can be kept. The hydrolysis-resistance alcoholysis-resistance glass fiber reinforced PPA material can be widely used in the automobile industry and other fileds. When the hydrolysis-resistance alcoholysis-resistance glass fiber reinforced PPA material is used for manufacturing parts which are in contact withwater and antifreezing solution for a long time, not only can the manufacturing cost of the parts be reduced, but also the weights of the parts can be greatly reduced.

The invention discloses an epoxy resin-enhanced laminated insulating profile. The epoxy resin-enhanced laminated insulating profile comprises modification polymers and a reinforcing material, wherein the modification polymers include epoxy resin, a curing agent, a promoting agent, a flame retardant, a wetting dispersant and a solvent; the reinforcing material is a fiber material; the components of the modification polymers are mixed to form a modification polymer solution, the reinforcing material is soaked into the modification polymer solution and is finally subjected to hot press molding to form the epoxy resin-enhanced laminated insulating profile. The epoxy resin-enhanced laminated insulating profile is integrated with lightness, flame retardance, corrosion resistance and insulativity, has extremely high mechanical property, excellent electrical insulation property and halogen-free flame retardance, is environmentally friendly, is high in use safety and can be applied to industries and fields including State Grid Corporation of China, new energy resources, energy conservation, consumption reduction and track traffic which have high requirements to material performance and special working conditions and environments.

The invention relates to a preparing method of a flame retardant, in particular to a preparing method of a phosphorus nitrogen high load graphene flame retardant. The method comprises the following steps: (1) performing a surface grafting reaction on isocyanate and graphene oxide to prepare isocyanate functionalized graphene; (2) reacting the isocyanate functionalized graphene with dendrimer polyamide-amine (PAMAM) to prepare dendrimer functionalized graphene; (3) reacting the dendrimer functionalized graphene with a phosphoryl chloride compound to prepare the phosphorus nitrogen high load graphene flame retardant. The phosphorus nitrogen high load graphene flame retardant can retard flaming of a modified high polymer material and can improve mechanical properties of the high polymer material.

The invention discloses a halogen-free expanded flame-retardant polypropylene film, relates to an expanded flame-retardant polypropylene film, and solves the problem that the conventional expanded flame-retardant polypropylene film is not environment-friendly and has low flame-retardant efficiency. The polypropylene film is prepared from the following components in part by weight: 68 to 77 parts of polypropylene, 20 to 32 parts of halogen-free expanded flame retardant, 1 part of processing aid and 0 to 0.08 part of anti-dripping agent, wherein the halogen-free expanded flame retardant consists of a triazine charring foaming agent, ammonium polyphosphate and ethylene-acrylate-maleic anhydride terpolymer intercalated organic montmorillonite master batch. The polypropylene film has the oxygen index between 21.7 and 30.6 percent, the combustion level of UL-94V-TM-0 level, the tensile strength between 13.12 and 18.43 MPa, the tearing strength between 25.67 and 32.98kN/m, and the elongation at break between 200 and 256.4 percent. The halogen-free expanded flame-retardant polypropylene film has excellent flame retardance, maintains excellent mechanical property of the film, and has the advantages of low smoke, low toxin, and environmental protection during combustion.

A method for preparing non-fired and non-steamed bricks by using sintering a dry desulphurization byproduct belongs to the field of resources comprehensive utilization. The method comprises the stepsof mixing the desulphurization byproduct with water to prepare a mixed material with a concentration ranging from 10% to 80%, stirring uniformly, and airing naturally a filter cake after filtering themixed material so that the water content becomes 10% to 30%; re-stacking the stewed steel slag for 170 days to 200 days; sieving the steel slag in a sieve with the size of 10mm, and taking out the minus sieve for sieving in another sieve with the size of 3mm, and then taking out the plus sieve; dosing based on the proportion of raw materials; and after stirring uniformly by a stirrer, feeding thestirred product into a brick machine to be pressed by the machine, and naturally curing in air for 28 days to obtain a finished product. The method has the advantages that the process route of non-firing and non-steaming is adopted to prepare energy-saving bricks, therefore, the products are energy saving and environment friendly with lower cost and the energy-saving bricks are no longer crackedin use.

An environment protection type composite polyurethane elastomer/nano laminated material is prepared through vacuum heating of dihydroxy polyoxyacrylether, dewatering, adding the mixture (MDI-50) of 4,4'-and 2,4'-diphenylmethane diisocyanate, reacting to obtain component A, compounding organic laminated nano material with trihydroxy or dihydroxy polyoxyacrylether, mixing with metaphenyldiamine pigment, filler and plasticizer to obtain component B, proportionally mixing components A with B, and laminating polymerization reaction under catalysis of zinc naphthenate. Its advantages are no pollution on preparing and using it, high mechanical performance, and excellent flame-retarding and anti-mildew performance.