410results about How to "Uniform foaming" patented technology

The invention relates to a blown rubber for a thick product. The blown rubber comprises a raw rubber matrix, a filler, carbon black, a plasticizer, a vulcanizing agent, a vulcanization accelerator, a blowing agent and an antiager, wherein the blowing agent is compounded by an organic blowing agent, a blowing activator and an inorganic blowing agent, and the organic blowing agent is a blowing agent AC, blowing agent H or a blowing agent OBSH (p,p'-oxybis(benzenesulfonyl hydrazine)). In preparation, the raw materials are mixed and extruded to form mixed material films, the mixed films are placed in a die, the pressure of a plate vulcanizer is regulated to 13-15MPa, and the temperature is regulated according to following time ranges for sulfide forming: the first stage: 60-70 DEG C, 30-60 minutes; the second stage: 80-100 DEG C, 30-40 minutes; the third stage: 110-140 DEG C, 30-40 minutes, and then the blown rubber composite can be obtained. The product has good apparent density and strength and is uniform in foaming.

The invention discloses a novel mould-pressing polyimide foamed plastic and a preparation method thereof. The foamed plastic comprises the following chemical components based on 100 mass parts of aromatic dianhydride: 100 parts of aromatic dianhydride, 60-70 parts of solvent, 60-65 parts of aromatic diamine, 100-130 parts of fatty alcohol, 1-5 parts of a foam stabilizing agent, 0.5-1 part of a catalyst and 20-30 parts of a foaming agent. The preparation method comprises the following steps of: (1) esterifying the aromatic dianhydride and the fatty alcohol to prepare diacid diester; (2) reacting the diacid diester with the aromatic dianhydride to prepare a precursor solution; (3) preparing a surfactant and a catalyst removal solvent by the precursor solution, drying and grinding into powder; (4) preparing a melt by taking the water as a foaming agent; (5) by a microwave foaming process, preparing a thermoplastic polyimide foam body; and (6) cutting the foam body and carrying out mould-pressing to prepare polyimide foam boards differing in density. The novel mould-pressing polyimide foamed plastic disclosed by the invention is simple in preparation process, dense and uniform in foam bubbles, low in preparation cost and easy in industrial production.

The invention relates to a magnesium cement foam material which is prepared by the following steps: mixing 10-90 wt% of light-burnt magnesium oxide powder, 5-89 wt% of filler and 0.8-10% of compound foaming agent, and mixing with a magnesium chloride solution which accounts for 100-150 wt% of the mixture; and evenly stirring, casting and forming to obtain the magnesium cement foam material. The invention can effectively lower the load of the buildings, has favorable thermal insulation property, and can be widely used for building blocks, heat engineering equipment, and various ventilating ducts and industrial ducts in industrial and civil buildings.

The invention provides a foamed polypropylene (PP) material which is prepared from the following components in parts by weight: 80-95 parts of PP:T30S, 5-20 parts of polyethylene (PE), 0.8-1.5 parts of foaming agent, 0.5-1 part of foaming aid, 0.2-0.8 part of cross-linking agent, 0.2-0.5 part of nucleating agent and 0.5-1.2 parts of assistant cross-linking agent. In the foamed PP material provided by the invention, the cost can be lowered because of the addition of the PE, the consumption of the PP is greatly reduced at the same volume of a syringe core rod, and the foamed PP material has theadvantages of easy shaping, uniform product foaming, good mechanical strength and the like and is favorable for lowering the cost and protecting the environment.

The invention aims at providing a two-phase flow interface parameter distribution characteristic experiment device under swinging condition, which comprises a water storage box, a mixing chamber, an experiment section, an air-water separation device, an air compressor, an air storage tank, a swing table, photoelectric converter and a light source, wherein the mixing chamber and the steam-water separation device are respectively installed at both ends of the experiment section, the water storage box is connected with the air-water separation device and the mixing chamber respectively, the air storage tank and the air compressor are connected in parallel and connected with the mixing chamber, and the mixing chamber is also connected with the swing table; and an optical fiber probe and a pressure sensor are installed on the experiment section, the photoelectric converter faces to the optical fiber probe, and the light source faces to the photoelectric converter. The invention further develops and perfects an experiment device for researching the air-liquid two-phase local parameter distribution and transportation mechanism in a large channel under the steady-state condition, foaming is uniform in the experiment, a stable bubble flow can be obtained, and the outlet pressure of the air-water separation device maintains constant by means of gravity separation.

The invention relates to a color rubber and plastic heat-insulating material and a preparation method thereof. The rubber and plastic heat-insulating material is prepared from polrvinyl chloride paste resin, dinitrosopentamethylene tetraamine, an antiager, styrene rubber, protective wax, an antioxidant, chlorosulfonated polyethylene rubber, diphenyl guanidine, mercaptobenzothiazole, zinc dibutyl dithiocarbamate, zinc diethydithiocarbamate and the like. The performance and the color difference of the product are stabilized by adding a coloring material to perform banburying on the finished rubber again and combining a new vulcanizing foaming technology and a super-long water-cooling system; the prepared color rubber and plastic heat-insulating material does not have fibers and dust, prevents dew formation, has a smooth surface and high cleanliness, has the same bright color as equipment, is environmentally-friendly and non-toxic, reduces secondary construction, saves cost, greatly improves the using performance of the product, prolongs the service life and takes full advantage of the product performance.

The invention discloses a method and apparatus for producing a foamed product based on 3D printing. The apparatus mainly comprises a molding unit, a supercritical infiltration unit and a foaming unit, wherein the molding unit is a 3D printer and mainly comprises a three-dimensional ball screw sliding table, a molding platform, a 3D printer case, a plasticizing screw, a heating ring and a nozzle; the supercritical infiltration unit is mainly composed of a preheater, a booster pump, a CO2 storage tank and an infiltration vessel; and the foaming unit is mainly composed of a steam generator, a foaming case and a cover plate. The method comprises the following steps: printing a three-dimensional model via the molding unit according to product needs; then putting the three-dimensional model into the infiltration vessel in the supercritical infiltration unit and carrying out infiltration by using supercritical CO2; and carrying out steam foaming in the foaming case so as to obtain the foamed product. According to the method and apparatus provided by the invention, production stages are simplified to three production stages, so production cost and process complexity are reduced, and simplified production of foamed products with any complex structures can be realized.

The invention discloses a fire retardant coating, which comprises the following components: an environment-friendly solvent, weather-proof acrylic resin, chlorinated polyether resin, flame retardant amino resin, a dispersing agent, composite foaming powder, a flame retardant material A, titanium white, a flame retardant material B, a flame retardant aid, wood fibers, an inorganic microbead hollowfiller and an anti-sagging agent. The invention also provides a preparation method for the fire retardant coating. The fire retardant coating can be coated on various substrates, is extra-thin, efficient and durable, is specially used outdoors, is resistant to the fire combustion of hydrocarbons, and has high chemical properties such as weather resistance, acid resistance, alkali resistance and the like, high adhesion and an attractive decorative effect, and paint films are fine; the fire retardant coating is uniformly expanded, and has a special foam structure and a high fireproof effect; and the product is environment-friendly and pollution-free, a production process is simplified, and the fire retardant coating is convenient to construct and can be used for coating with various fireproof requirements.

The invention discloses a PVC foaming coating. The PVC foaming coating comprises, by weight, 330-350 parts of environmentally-friendly plasticizer, 360-390 parts of PVC paste resin, 15-18 parts of liquid stabilizer, 20-22 parts of AC foaming agent, 20-22 parts of microsphere foaming agent, 75-80 parts of titanium dioxide, 250-275 parts of ground calcium carbonate and 30-33 parts of matting agent. By means of the potassium/zinc liquid stabilizer, the AC foaming agent and the microsphere foaming agent, the foaming function of the PVC foaming coating can be effectively improved, the foaming ratio of PVC foaming wallpaper can be improved, and satisfactory foaming quality can be obtained.

The invention relates to a foaming material and a molding method thereof, in particular to an ethylene propylene diene monomer (EPDM) and chlorinated polyethylene (CPE) foaming material and a molding method thereof. The material is prepared in the following steps that: firstly, high-temperature mixed rubber containing ethylene propylene diene monomer (EPDM) and chlorinated polyethylene (CPE) is mixed in an internal mixer according to a formula; after piece output and placing, high-temperature mixed rubber is mixed into low-temperature rubber according to a mixture radio; after the low-temperature rubber is cut into pieces, foaming is extruded on an extruding machine; and secondary sulfuration and shaping are carried out in a drying tunnel after the extruding so as to manufacture the foaming material. The invention has the characteristics of favorable season durability, temperature durability, aging durability, damping seal, and the like, and can be applied to the fields of heat insulation of a central air conditioner and a pipeline of a refrigeration set, buffer pad, sound absorption, voice reduction, and the like.

The invention relates to super-light aluminum oxide foam ceramic and a preparation method thereof. According to the technical scheme, sugar and aluminum oxide fine powder are used as raw materials, wherein the mass ratio of the sugar to the aluminum oxide fine powder is 1 to (0.4-1.6); and a combustion-supporting agent which is 0.1wt%-0.5wt% of the raw materials is additionally added and then is uniformly mixed with the raw materials to obtain a mixture; the mixture is heated to 100-200 DEG C and the heat is preserved for 1-3 hours to obtain a dispersion system in which the aluminum oxide fine powder and the combustion-supporting agent are dissolved into a sugar solution; then the dispersion system is foamed and cured for 8-25 hours under a continuous temperature condition of 120-180 DEG C; and a cured blank is heated to 1400-1600 DEG C and the heat preservation is performed for 3-9 hours to obtain the super-light aluminum oxide foam ceramic. The preparation method has a simple process and is environmentally friendly; and the product has low volume density, high porosity and high strength and has no cracks.

The invention relates to an ultra-thin electron radiation crosslinked polyolefin foamed sheet and a preparation method thereof. The preparation method comprises the following steps: step 1: adding LLDPE (Linear Low Density Polyethylene), EPDM (Ethylene-Propylene-Diene Monomer), EVA (Ethylene Vinyl Acetate), A171, DCP (Dibasic Calcium Phosphate), PE (Polyethylene) wax and an antioxidant 1010 to an internal mixer for fully internal mixing for 8-10 minutes at the internal mixing temperature of 70-100 DEG C, and then discharging the mixture into a double-stepped mixing granulator for mixing, grafting and granulation to obtain a grafting base material; step 2: adding the grafting base material, an AC foaming agent, a crosslinking agent, zinc stearate and talcum powder into a high-speed mixer for mixing, and then discharging the mixture into a single screw extruder to be extruded into a sheet; step 3: adding the extruded sheet in the step 2 to an electronic accelerator for radiation crosslinking; step 4: adding the sheet subjected to radiation crosslinking to a foaming furnace for foaming; and step 5: directly adding the formed sheet to a double-roll calender for calendering to obtain the electron radiation crosslinked polyolefin foamed sheet with the thickness of 0.1-0.3mm.

The invention discloses an exterior wall board insulation material with excellent mechanical properties. The exterior wall board insulation material comprises the following raw materials in parts by weight: 30-60 parts of expanded polystyrene, 25-35 parts of polyurethane-modified epoxy resin, 35-45 parts of organosilicon-modified phenolic resin, 8-12 parts of modified graphite powder, 1.5-2.5 parts of bis-tributylphenol polyoxyethylene ether, 3-4 parts of epoxidized soybean oil, 4-8 parts of mica powder, 8-12 parts of graphene nanosheet, 6-10 parts of calcium silicate, 2-4 parts of aluminum oxide, 3-5 parts of sodium silicate, 2-3 parts of magnesium oxide, 4-12 parts of calcined clay, 1.5-2.5 parts of phosphoric acid, 1.5-2.5 parts of p-methylsulfonic acid, 2-3 parts of a physical foaming agent and 35-55 parts of water. The exterior wall board insulation material with the excellent mechanical properties, provided by the invention, is uniformly foamed, has excellent heat insulation and the excellent mechanical properties, and has very good fire resistance.

The invention relates to a silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite and a preparation method thereof. The composite comprises a grated component A, a catalytic component B and halogen-free flame retardant masterbatch according to a weight proportion of 100: (3-10): (10-60), wherein the grated component A comprises low-density polyethylene, high-strength polyethylene, high-flow polyethylene, a silane crosslinking agent, a grafting initiator, a first antioxidant, a lubricating agent and 3-aminopropyl trimethoxy silane; the catalytic component B comprises an ethylene-vinyl acetate copolymer, low-density polyethylene, a second antioxidant, a crosslinking catalyst, a foaming aid and an ultraviolet light absorber; and the halogen-free flame retardant masterbatch comprises an ethylene-octylene copolymer, a modified main flame retardant, an auxiliary flame retardant, zinc stearate and a third antioxidant. The silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite has the characteristics of excellent flame retardance, low smoke and toxicity, uniformity in foaming, natural crosslinking property, high temperature resistance and the like.

A coextruded polyethylene blown film, particularly for packaging, has a thickness between 20 μm and 250 μm and is formed by a foamed, particle-containing core layer between a first unfoamed weldable outer layer and a second unfoamed outer layer. The core layer has a polyethylene or a polyethylene-based mixture as a polymer component having a melt mass-flow rate (MFR) per DIN ISO EN 1133 of greater than 5 g/10 min at 190° C. and 2.16 kg.

The invention discloses a light environment-friendly brick prepared from waste brick powder, and a preparation method for the light environment-friendly brick. The light environment-friendly brick prepared by the method comprises the following raw materials in percentage by weight: 50 to 60 percent of polishing brick waste mud, 10 to 15 percent of waste brick powder, 10 to 15 percent of Qidao clay, 10 to 15 percent of aluminum ore, 5 to 10 percent of mung bean mud, 0.3 percent of foaming agent, 0.5 percent of water reducing agent and 0.08 percent of green body intensifier, wherein the polishing brick waste mud is waste mud which is wasted when a polishing brick is produced; and the waste brick powder is brick powder which is wasted when a common brick is produced. The problems about control over foaming rate and flatness of a product in a drying and calcination process can be solved, the prepared finished product is smooth and flat in surface, and closed air holes in the brick are ideal. Meanwhile, the waste brick powder and the waste mud in a ceramic production enterprise are used as raw materials, so industrial waste is treated, production cost is saved, environment is protected, and energy consumption is reduced.

The invention discloses organic foaming silicone rubber. The organic foaming silicone rubber is prepared by mixing, by weight, 100 parts of hydroxy-terminated hydrogen-containing polysiloxane, 5-50 parts of vinyl silicone oil, 5-40 parts of white carbon black, 0.2-2 parts of a reaction inhibitor and 0.1-1 part of a platinum catalyst. The foaming ratio can be controlled flexibly, reaction cross-linking points are increased, stability is good, foaming is uniform, and a foaming agent does not need to be used.

The invention provides an inorganic foamed concrete insulation board and a preparation method thereof. The insulation board comprises foamed concrete, and has density of 160-250kg / m<3>, compressive strength of 0.3-0.5 MPa, and coefficient of thermal conductivity of 0.05-0.062 W / m.K. The prepared insulation board has the characteristics of low unit weight and good heat insulation effect, and can be widely used as an insulation material in the field of construction.

The invention relates to a manufacturing method of a helmet, comprising the following steps: manufacturing an injection mold of a plastic helmet; manufacturing mixed foamed plastic liquid, leading the liquid into a first storage machine barrel, extruding the liquid out of the first storage machine barrel, then leading the liquid into an injection machine barrel by a first check valve, simultaneously feeding materials into the first storage machine barrel by a feeding machine barrel, pressurizing the injection machine barrel, carrying injection until the mold is molded, firstly cooling the surface of the plastic liquid, measuring the current amount of injection of the injection machine barrel and the current output speed of the feeding machine barrel, adjusting the output speed of the feeding machine barrel, adjusting the rotating speed of a screw of the feeding machine barrel so as to control the feeding speed of the plastics and simultaneously adjusting the admission speed so as to match the feeding speed of the plastics. The product obtained according to the method comprises a lining which is coated by an outer layer; the helmet product obtained according to the method comprises the outer layer which does not contain bubbles or contains few bubbles and an inner core containing bubbles; and the inner core is coated by the outer layer.

The invention provides energy saving fireproof paint and a preparation method thereof. The energy saving fireproof paint comprises the following components in parts by weight: 20-30 parts of a fire retardant, 7-12 parts of a carburization agent, 7-12 parts of a foaming agent, 9-15 parts of an inorganic hollow material, 10-22 parts of titanium dioxide, 31-43 parts of a cross-linking agent, 3-5 parts of an anti-aging agent, 2-5 parts of magnesium hydroxide, and 2-5 parts of diatomite. The energy saving fireproof paint has the advantages of solar heat reflection, heat insulation, water resistance, and corrosion resistance, and the advantages are identical to the advantages of energy saving paint; at the same time the energy saving fireproof paint has the advantages of self-extinguishing, flame retardation, formation of a compact heat insulating protective layer by expansion during fire hazard, and the like, and the advantages are identical to the advantages of fireproof paint.

A turn over type foaming clamp consists of template part, turn over mechanism assembly composed of mold and ejection mechanism, turn over arm symmetrically set at two sides of turn over mechanism, and support lever hinged with turn arm. In the process of forming of refrigerator casing, the foaming liquid is promoted to flow, so making more uniformly foaming and better thermo-insulation. Said invention is more adaptive for thin casing.

The invention provides a carbon fiber honeycomb reinforced polyimide foam material and a preparation method thereof. The foam material is obtained through a reaction of polyimide prepolymer powder and a carbon fiber honeycomb material. A preparation method of the polyimide prepolymer powder comprises the steps that BTDA and methyl alcohol are reacted for 1.5-2.5 h in a backflow state to prepare a 3,3',4,4'-benzophenone tetramethyl acid dimethyl ester solution, BPDA and methyl alcohol are reacted for 10-11 h in a backflow state to obtain a 3,3',4,4'-biphenyl tetracarboxylic acid dimethyl ester solution, the obtained 3,3',4,4'-benzophenone tetramethyl acid dimethyl ester solution and the obtained 3,3',4,4'-biphenyl tetracarboxylic acid dimethyl ester solution are mixed, MDA is added into the mixture, stirring is performed at room temperature for 0.5-1 h, a foam stabilizer is added, stirring continues to be performed for 0.5-3 h, a polyimide prepolymer solution is prepared, and the polyimide prepolymer solution is dried to obtain the polyimide prepolymer powder, wherein the mole ratio of the BTDA to the BPDA is (6-8):(2-4). The carbon fiber honeycomb reinforced polyimide foam material has uniform foam holes and quite high mechanical property and is low in production cost.

The invention discloses a polyvinyl chloride co-extrusion foaming furniture board and a manufacturing method thereof, belongs to the technical field of polyvinyl chloride boards, and aims at solving the problems of high density, low hardness and toughness, and rough surface of the conventional product. The polyvinyl chloride co-extrusion foaming furniture board comprises a core layer and a surfacelayer, wherein the core layer comprises 60-80 parts of polyvinyl chloride SG8 type resin, 45-60 parts of triple superphosphate, 35-50 parts of recovery material, 5-6 parts of foaming conditioner P, 2.8-3.2 parts of a calcium-zinc stabilizer, 0.5-0.6 parts of an inner lubricating agent SP-60, 0.1-0.25 part of micronized polyethylene wax N-14P, 0.4-0.5 part of a plasticizer OA, a foaming agent anda pigment. The method comprises the following steps: preheating a heat mixing pot; sequentially adding chloroethylene resin, recovery material, calcium powder and the lubricating agent in sequence; heating; sequentially adding the foaming agent, the foaming conditioner and the rest materials; heating; cooling; extruding the materials to obtain the finished product through an extruder. The method is carried out to manufacture the furniture board.