44 results about "Phenolformaldehyde foam" patented technology

A composition for producing phenolic foam has at least one phenolic resin, at least one blowing agent, at least one catalyst, and at least one polyethersiloxane. A process produces a phenolic foam with a density of from 5 to 500 kg / m3 with a reaction mixture having the composition.

The utility model discloses a kind of building wallboards with thermal insulation effect, the utility model includes heat preservation structure, adhesive layer, extruded polystyrene board, aluminium foil composite film, anti-cracking layer and facing layer, heat preservation structure includes the first modified phenolic foam board of setting, the second modified phenolic foam board of a plurality of being placed in the first modified phenolic foam board, screw rod passing through the first modified phenolic foam board and nut being screwed on screw rod, adhesive layer is coated in the right side of first modified phenolic foam board, extruded polystyrene board is bonded in the left side of adhesive layer, aluminium foil composite film is bonded in the left side of extruded polystyrene board, anti-cracking layer is bonded in the left side of aluminium foil composite film, facing layer is bonded in the left side of anti-cracking layer.The utility model can adjust thermal insulation effect according to actual use scene by setting heat preservation structure, extruded polystyrene board and aluminium foil composite film, use range is big, then the attenuation rate of thermal insulation performance can be reduced by breathable waterproof layer and nanometer hydrophobic coating.

The utility model discloses a low-temperature-resistant antifreeze plastic-coated composite steel pipe which comprises a plastic-coated composite steel pipe body, the plastic-coated composite steel pipe body comprises a pipe body, the circumferential outer wall of the pipe body is fixedly connected with a heat preservation layer, the circumferential outer wall of the heat preservation layer is provided with a plastic-coated layer, and the circumferential outer wall of the plastic-coated layer is fixedly connected with a heat insulation layer. The outer circumferential wall of the heat insulation layer is coated with a wear-resistant layer, the wear-resistant layer is made of polytetrafluoroethylene, the plastic-coated layer is made of epoxy resin or polypropylene, and the heat preservation layer is made of polyurethane heat preservation materials or phenolic foam heat preservation materials or aluminum foil materials. According to the plastic-coated composite steel pipe, the plastic-coated composite steel pipe body has good heat preservation and heat insulation performance and is more anti-freezing and durable, meanwhile, the plastic-coated composite steel pipe body can be more resistant to corrosion and aging, and the plastic-coated composite steel pipe body can be further reinforced through the steel mesh.

The present invention relates to a composition for producing phenolic foams, comprising at least one phenolic resin, at least one blowing agent, at least one catalyst and at least one polyethersiloxane of formula 1 MaMb1DcDd1, to a process for producing phenolic foams, and to phenolic foams produced by the process.

The utility model relates to the technical field of traditional Chinese medicine nursing, in particular to a moxibustion device for traditional Chinese medicine nursing. According to the moxa stick burning device, moxa sticks are placed in the fixed bin, it can be guaranteed that the medicine efficacy of the moxa sticks is kept to the maximum extent in the burning process, meanwhile, waste of the moxa sticks can be avoided, the moxa sticks can be burnt to the maximum extent by pushing the moxa sticks through the telescopic rod, the medicine efficacy of the moxa sticks can be exerted to the maximum extent, and a patient can be treated; the moxa stick is located in the semi-sealed space, pollution can be reduced, heat generated during combustion of the moxa stick can be isolated through the outer shell made of phenolic foam plastic and the inner shell made of the aerogel felt, and the phenolic foam plastic is a low-price and high-quality light heat insulation material and has the advantages of being light in weight, good in heat insulation performance and the like. The aerogel felt has the characteristics of being soft, easy to cut, small in density, inorganic, fireproof, integrally hydrophobic, environment-friendly and the like, and the aerogel felt and the aerogel felt can achieve the purposes of protecting hands of doctors and preventing scalds.

The invention relates to the technical field of building thermal insulation materials, in particular to a waterproof thermal insulation core material and a preparation method thereof.According to the waterproof thermal insulation core material and the preparation method thereof, phenolic resin is modified through lignin-based polyurethane prepolymer, a foaming technology of Tween-80 and n-pentane is combined, a foam structure high in percentage of closed area and uniform in pore diameter is formed, heat conduction is effectively reduced, and the thermal insulation performance is improved; the thermal insulation performance of the core material is improved; a flexible chain segment of the lignin-based polyurethane prepolymer can improve the brittleness of the phenolic foam, so that the compressive strength is improved, and the load of the external facade of a building can be tolerated; and secondly, the rock wool has excellent heat insulation performance, after cleaning and punching treatment, the porosity is effectively improved, and the foaming agent can permeate conveniently, so that the overall heat conductivity coefficient of the material can be further reduced, the air permeability and the drainage performance are enhanced, and heat insulation performance attenuation caused by water retention is avoided.

The present application relates to the field of composite wall, especially to a kind of prefabricated energy-saving composite interior wall.The present application provides a kind of prefabricated energy-saving composite interior wall, which can change the performance of wall according to demand.A kind of prefabricated energy-saving composite interior wall, comprising upper sealing convex plate, lower sealing concave plate, right sealing concave plate, left sealing convex plate, interior wall and assembly mechanism, the left part of lower sealing concave plate is connected with left sealing convex plate on the upper side, the right part of lower sealing concave plate is connected with right sealing concave plate on the upper side, interior wall is slidably connected between the front and rear parts of left sealing convex plate and right sealing concave plate, upper sealing convex plate is connected between the upper side of left sealing convex plate and right sealing concave plate, and assembly mechanism is arranged between right sealing concave plate and left sealing convex plate.The present application places low-frequency sound-absorbing cotton into the first light steel keel, and then places first gypsum board, phenolic foam board and second gypsum board into the second light steel keel in sequence, so as to realize the effect of heat preservation and sound insulation, and people can also put in corresponding materials according to demand, so as to realize different performance of interior wall.

The utility model relates to the technical field of building ventilation and fire protection, in particular to a phenolic aldehyde composite inorganic smoke prevention and exhaust air pipe plate. The structure comprises an outer protective layer, a middle reinforcing layer and an inner fireproof layer which are sequentially stacked from top to bottom, the outer protective layer is a phenolic resin prepreg; the middle reinforcing layer is an inorganic plate core material, and criss-cross reinforcing ribs are embedded in the middle reinforcing layer; the inner fireproof layer is phenolic foam; according to the air pipe plate, the three-layer composite structure design is adopted, the outer protective layer provides flame-retardant protection through phenolic resin prepreg, the middle reinforcing layer achieves balance of high bending strength and light weight through combination of an inorganic plate core material and reinforcing ribs, and the inner fireproof layer remarkably improves the heat insulation performance through phenolic foam; on the premise of ensuring that the fire endurance is not less than 120 minutes, the density of the whole structure is obviously lower than that of a traditional air pipe plate, moisture resistance and weather resistance are both considered, and the air pipe plate is suitable for complex building environments.

A phenolic foam and method for manufacturing same are described herein. The foam is formed from a foamable phenolic resin composition, and a blowing agent, the phenolic foam comprising 1 to 5% by weight of red phosphorus based on the weight of the phenolic foam wherein said phenolic foam has a density of from 10 kg / m3 to 100 kg / m3, a closed cell content of at least 85% as determined in accordance with ASTM D6226 and wherein said foam has a FIGRA0.2 MJ of 120 W / s or less, when measured according to EN13823 and a thermal conductivity of 0.023 W / m·K or less, at 10° C., in accordance with EN 13166:2012. The foam has excellent thermal insulation performance and excellent fire performance.

The present invention discloses a composite pipe fitting for an automotive air conditioner and its special bonding equipment, including. A composite pipe fitting for an automotive air conditioner includes a pipe body, a fiber layer, a thermal insulation layer, and a wear-resistant layer. A fiber layer is provided on the outer wall of the pipe body, a thermal insulation layer is provided on the outer wall of the fiber layer, and a wear-resistant layer is provided on the outer wall of the thermal insulation layer; the thermal insulation layer is made of one of polyurethane foam, polystyrene board, EPS, XPS, and phenolic foam materials; the fiber layer, thermal insulation layer, and wear-resistant layer provided by the present invention improve the thermal insulation effect and wear resistance of the pipe body, avoid the pipe body from cracking after long-term use, and increase the service life of the pipe body; the special bonding equipment provided facilitates the application of glue to the connection part of the connector and also facilitates the connection between the connector and the composite pipe, increasing the firmness and stability of the composite pipe, and also facilitating the heating and softening of the connection end of the composite pipe, facilitating the connection between the composite pipe and the connector, which is relatively convenient and labor-saving.

The invention relates to the field of composite materials, and discloses a carbon aerogel composite material as well as a preparation method and application thereof. The carbon aerogel composite material comprises a carbon foam skeleton and a carbon aerogel matrix attached to and not attached to the carbon foam skeleton, a precursor of the carbon aerogel matrix is phenolic resin; a precursor of the carbon foam framework comprises one or more of polyurethane foam, polyimide foam, melamine foam and phenolic foam. A carbon foam skeleton in the carbon aerogel composite material can play a powerful supporting role, and shrinkage and collapse of a carbon aerogel matrix are limited; the carbon foam skeleton and the granular carbon aerogel matrix can be synergistically pyrolyzed and shrunk, and meanwhile, residual thermal stress can be effectively and uniformly released along the carbon foam skeleton, so that brittle fracture of the carbon aerogel matrix can be effectively prevented; the room-temperature heat conductivity of the carbon aerogel composite material is as low as 0.037 W / m.K, and the carbon aerogel composite material has good heat insulation performance.

A method for preparing an iron-silicon modified biochar flame retardant and a method for preparing a modified phenolic foam thereof, belonging to the field of thermal protection technology. The scheme comprises the following steps: hydrolyzing straw powder, washing and drying to obtain biochar; mixing biochar and ferrous sulfate solution, filtering and drying to obtain iron-modified biochar; blending iron-modified biochar, organosilicon and halogen-free flame retardant to obtain iron-silicon modified biochar flame retardant. Adding an alkaline catalyst to melted phenol, stirring evenly, then adding paraformaldehyde in batches at a uniform speed, and obtaining a resol phenolic resin through a step reaction; lowering the temperature to 60-70°C, adding boric acid solution dropwise to the resol phenolic resin for constant temperature reaction, and rotary evaporation to control the resin solid content to 60%-70% to obtain a boron-modified phenolic resin; blending the boron-modified phenolic resin, the iron-silicon modified biochar flame retardant and a foaming aid, and foaming treatment to obtain a silicon-modified biochar flame-retardant phenolic foam.

The invention relates to the technical field of phenolic aldehyde spraying foam, in particular to mining phenolic aldehyde spraying foam and a preparation method thereof.The preparation method comprises the steps that phenolic resin, long-chain polyhydric alcohol and a catalyst are stirred according to the proportion, mixed to be uniform and then filtered, and a component A is obtained; stirring isocyanate, a flame retardant and a foam stabilizer according to a ratio, uniformly mixing, and filtering to obtain a component B; and proportioning the component A and the component B to obtain the mining phenolic aldehyde spraying foam. The mining phenolic aldehyde spraying foam prepared by the invention has excellent flame retardant property, and can effectively reduce the fire risk. The foam has high bonding strength with the coal mine tunnel wall, is not easy to fall off, has moderate foaming times and compression ratio, and can be used for filling tunnel gaps and keeping the tunnel gaps stable. The foam pulverization rate is low, the service life is long, and a reliable solution is provided for underground water prevention, water plugging, filling, corrosion prevention and the like of a coal mine. Therefore, the problem that the existing phenolic foam board is poor in adaptability when being applied to the underground coal mine is solved.

The utility model relates to the technical field of pipeline heat preservation, in particular to a heat preservation pipe shell structure based on phenolic foam and a heat preservation pipe shell. The structure sequentially comprises a lining layer, a reflecting layer attached to the outer surface of the lining layer and a protective layer wrapping the outer surface of the reflecting layer from inside to outside. The lining layer is made of phenolic foam; the reflecting layer is made of aluminum foil composite glass fabric; and the protective layer is made of a flame-retardant high polymer material or a fiber reinforced composite material. Through composite design and combination of a mortise and tenon type concave-convex groove connection structure, the thermal insulation performance, the mechanical strength, the moisture resistance and the installation efficiency are remarkably improved, and the structure is suitable for various harsh working conditions.

The utility model relates to the technical field of seawater desalination, in particular to a seawater desalination planting pot. The planting pot comprises an outer-layer transparent cylinder for collecting fresh water and an inner-layer transparent cylinder for storing seawater, a phenolic foam layer is arranged in the inner-layer transparent cylinder, the lower part of the phenolic foam layer is a seawater adsorption layer, and the upper part of the phenolic foam layer is a black carbonization layer; a purification foam layer and a planting basket are sequentially arranged at the upper part of the outer-layer transparent cylinder from bottom to top; a plant root system suspension layer, a planting matrix and a plant layer are sequentially arranged in the planting basket from bottom to top; the seawater adsorption layer of the planting pot can effectively separate salt and prevent the salt from entering the planting layer, the black carbonization layer has the heat absorption characteristic and can accelerate generation of fresh water, seawater desalination is achieved through the synergistic effect of the seawater adsorption layer and the carbonization layer by means of natural evaporation and material adsorption, the planting process is simplified, and the planting efficiency is improved. The fresh water purification device is suitable for regions deficient in fresh water and supports planting of various vegetables and flowers.

The utility model relates to the technical field of phenolic foam modification processing, in particular to a blending device for phenolic foam filled modified polyethylene plastics, which is characterized in that when the blending device is used, an anti-blocking component is started, so that the anti-blocking component conveys materials in a storage hopper into a material distributing component through a material conveying pipe; the material distribution assembly disperses materials in the blending tank, and after stirring is completed, the materials are discharged through the discharging assembly, so that the mixing and stirring efficiency is improved; comprising a blending tank, supporting legs, a storage hopper, a supporting rod and a material conveying pipe, the multiple sets of supporting legs are arranged at the bottom end of the blending tank, the supporting rod is arranged at the bottom end of the storage hopper, the bottom end of the supporting rod is connected with the top end of the blending tank, and the material conveying pipe is arranged at the output end of the bottom of the storage hopper; and a material distributing assembly is arranged on the blending tank and rotationally communicates with the output end of the material conveying pipe, a stirring assembly is arranged at the bottom end of the material distributing assembly, and an anti-blocking assembly is arranged in the storage hopper.

The application discloses a preparation method of a phenolic resin synthesized by partially using PMI foam waste, relates to the technical field of resin synthesis and application, and realizes the reuse of PMI corner powder, reduces the preparation cost of the phenolic resin, and simultaneously improves the mechanical properties of the phenolic resin. Different phenolic resins can be prepared by using different formula resins and different powder dosages, the phenolic resins are applied to different fields, and the application has the significance of environmental protection. The phenolic resin is water-soluble thermosetting resol phenolic resin, and can be used as raw material of phenolic foam; by reasonably controlling the performance parameters of the resin, the resin can also be used as mould pressing material, laminated board material, insulating material, weather-resistant fiber board, metal casting mould and glass steel mould pressing material glue, coating material and the like.

The invention provides a composite material light enclosure bulkhead used in a ship cabin and a preparation method, the composite material light enclosure bulkhead comprises a flame-retardant core layer and panels on two sides of the flame-retardant core layer, and a flame-retardant adhesive is coated between the panels and the flame-retardant core layer; the flame-retardant core layer comprises at least one of fiber reinforced phenolic foam, hard polyimide foam, phenolic foam filled honeycomb foam and a hard inorganic foam core material, and the panel is a reinforced fiber phenolic resin composite board; the composite material light enclosure bulkhead has the advantages of flame retardance, light weight, structural strength, marine environment resistance and the like, efficient fire prevention and flame retardance can be achieved without wrapping the outer surface with a fireproof insulating material, and the composite material light enclosure bulkhead can be applied to non-bearing cabin wall plates in ship cabins, high-speed train compartment wall plates, building internal space partitions and other scenes.

A phenolic foam and method for manufacturing same are described herein. The foam comprises at least on chlorinated hydrofluoroolefin, at least one hydrofluoroolefin and at least one hydrocarbon. The foam has excellent thermal insulation performance and excellent fire performance.

The invention discloses an extraction process of apple polyphenol, and belongs to the technical field of agricultural product extraction. Hydroxyl on the surface of chitosan is grafted with a sulfydryl-containing silane coupling agent, sulfydryl-modified chitosan is combined with polar groups on the surface of phenolic foam carbon through electrostatic attraction, so that the sulfydryl-modified chitosan is loaded on the foam carbon; modified foam carbon is obtained; the preparation method comprises the following steps: initiating ring opening of an anhydride group of maleic anhydride through hydroxyl of hydroxypropyl methacrylate, and then copolymerizing with isocyanate and polyether polyol to obtain double-crosslinking interpenetrating resin; according to the method, the apple polyphenol extract is purified successively by utilizing the bi-crosslinking interpenetrating resin and the modified foam carbon, the surface of the modified foam carbon is rich in sulfydryl and hydroxyl, the phenolic hydroxyl and sulfydryl of apple polyphenol can form a strong hydrogen bond or thioether bond, the specific surface area and porosity of the modified foam carbon are high, the apple polyphenol extract is easy to purify, and the apple polyphenol extract is easy to purify. The modified foam carbon skeleton has high compression strength and low swelling rate, and has a stable structure in organic elution solvents such as ethanol, acetone and the like.

The invention discloses an external wall thermal insulation fireproof assembly and an external wall thermal insulation system, the external wall thermal insulation fireproof assembly comprises a thermal insulation fireproof plate, and the thermal insulation fireproof plate comprises a calcium silicate fiberboard, a rock wool board, a phenolic foam board and an aluminum hydroxide fiberboard. The first inserting grooves with the same depth are drilled in the outer side of the outer wall body at equal intervals through the electric drill in advance, the long screws are fixed into the first inserting grooves through the embedded steel bar glue, the screw holes correspond to the first through holes, and after the embedded steel bar glue is solidified, the long screws are connected with the threaded grooves; according to the heat-preservation fireproof plate, the long screw is arranged in the connecting piece, the short screw penetrates out of the first through hole and is screwed into the screw hole through an external screwdriver, so that the fixing effect between the long screw and the connecting piece can be improved, then the heat-preservation fireproof plate is clamped on the surface of the connecting piece, and the heat-preservation fireproof plate is extremely difficult to separate from the surface of the connecting piece under the cooperation of a spring, a reserved groove, a limiting block and a limiting groove; and therefore, the firmness of fixation between the heat-preservation fireproof plate and the outer wall body is improved.

The application belongs to the field of planting, and aims at the problem of single function of the existing plant rooting culture support, and specifically provides application of a phenolic foam-nano montmorillonite composition in preparation of a porous matrix block for rooting of somatic embryo seedlings. Any one of the phenolic foam-nano montmorillonite compositions Y1-Y3 is disclosed to be applied in preparation of a porous matrix block for rooting of somatic embryo seedlings: Y1 is applied in preparation of a porous matrix block for rooting of somatic embryo seedlings; Y2 is applied in promotion of plant lateral root formation; and Y3 is applied in plant planting. The composition is obtained by foaming and solidification of the phenolic foam-nano montmorillonite composition after adding nano montmorillonite into a phenolic resin prepolymer. The matrix block prepared from the phenolic foam-nano montmorillonite composition can significantly promote lateral root formation of plants, especially Picea somatic embryo seedlings, greatly enhance the absorption and fixation capacity of the seedlings, and significantly improve the growth amount of seedling height, the lateral root occurrence proportion and the average lateral root number.

The application relates to the field of building materials, in particular to a graphene modified phenolic foam sound insulation board and a preparation method thereof. The graphene modified phenolic foam sound insulation board comprises an outer layer and a phenolic foam layer arranged between two outer layers, and the raw materials of the phenolic foam layer comprise phenolic resin, an emulsifier, graphene, a foaming agent and a curing agent; the mass ratio of the phenolic resin, the emulsifier, the graphene, the foaming agent and the curing agent is 1:(0.08-0.2):(0.02-0.06):(0.03-0.09):(0.1-0.3). The phenolic foam layer prepared from phenolic foam and graphene sheets can form resonance absorption with the sound wave vibration of a floor, so that the effect of noise reduction and sound insulation is achieved. The phenolic foam board with added graphene has high structural strength and good fireproof performance, and has great practical application value in the field of building sound insulation.

The present invention relates to a flame-retardant thermal insulation material for aircraft, comprising a polyetheretherketone layer, a metal layer, a flame-retardant silicon aerogel layer and a phenolic foam fireproof and thermal insulation layer arranged in sequence from the outside to the inside; the flame-retardant silicon aerogel layer and the phenolic foam fireproof and thermal insulation layer both have a plate-like structure; the flame-retardant silicon aerogel layer comprises a first honeycomb material and a flame-retardant silicon aerogel filled in the honeycomb material, and the phenolic foam fireproof and thermal insulation layer comprises a second honeycomb material and a phenolic foam material filled in the honeycomb material; along the thickness direction of the flame-retardant thermal insulation material for aircraft, the first honeycomb material and the second honeycomb material both comprise a plurality of layers of sub-honeycomb structures, and the honeycomb density of the sub-honeycomb structures decreases or increases in sequence.

To provide a phenol resin foam material having good performance characteristics.SOLUTION: A composition for producing a phenol resin foam material contains at least one kind of phenol resin, at least one kind of foaming agent, at least one kind of catalyst, and at least one kind of polyether siloxane by formula 1: MaMb1DcDd1, wherein maximum 50 mol% of a residue R1 in polyether siloxane by formula 1 is each independently the same or different alkyl residue having 6 to 18 carbon atoms, and 0.1 to 20 pts.wt. of the total amount of at least the one kind of polyether siloxane by formula 1 is contained based on 100 pts.wt. of the whole phenol resin to be used.SELECTED DRAWING: None

The utility model discloses a building thermal insulation material, which relates to the technical field of building materials, and comprises a base layer wall body, a curtain wall keel and an outer wall facing layer, one side of the curtain wall keel is fixedly connected with a thermal insulation layer, and the other side of the curtain wall keel is fixedly connected with an anti-crack protective layer. According to the utility model, the heat insulation and preservation plate is arranged, and meanwhile, a vacuum state is formed in the heat insulation and preservation plate, so that three heat transfer modes of heat radiation, heat conduction and heat convection can be effectively blocked, and the energy efficiency of a building is obviously improved; the phenolic foam layer and the fiber glass wool board are arranged, and the phenolic foam layer has the advantages of being low in heat conductivity coefficient, good in heat preservation and heat insulation performance, fireproof, flame-retardant, non-toxic, green, environment-friendly and sound-proof, and meanwhile, the fiber glass wool board is a superfine fiber glass wool board; the heat conductivity coefficient is low, the heat insulation performance is good, and sound absorption and noise reduction are realized.

The utility model relates to the technical field of sound insulation plates, in particular to a phenolic foam sound insulation plate. The structure sequentially comprises a surface sound absorption layer, a first enhancement layer, a main sound insulation layer, a second enhancement layer, a fireproof layer and a bottom reflection layer from top to bottom. The surface sound-absorbing layer is made of open-cell phenolic foam, and a hemispherical groove is formed in the surface of the surface sound-absorbing layer; the main sound insulation layer is made of closed-cell phenolic foam; the first reinforcing layer and the second reinforcing layer are made of glass fiber gridding cloth and are embedded into the upper surface and the lower surface of the main sound insulation layer respectively. The fireproof layer adopts a nano aluminum hydroxide coating and is coated on one side, far away from the main sound insulation layer, of the second enhancement layer; the bottom reflecting layer is an aluminum foil film and covers the side, away from the main sound insulation layer, of the fireproof layer. Through the design of a multi-layer composite structure, the sound insulation performance and the strength and fireproof performance of the sound insulation board are effectively improved, multiple noise reduction mechanisms of sound absorption, blocking and reflection are formed, and the sound insulation board can be widely applied to building and industrial scenes and has environment friendliness and economical efficiency.

The utility model provides a kind of building waterproof heat preservation structure, including mounting bracket, mounting plate, first leveling layer, first waterproof layer, heat preservation layer, second waterproof layer, second leveling layer and facing layer;The mounting bracket is fixed on building outer wall, and the mounting plate is fixed on mounting bracket;The first leveling layer, first waterproof layer, heat preservation layer, second waterproof layer, second leveling layer and facing layer are sequentially stacked from inside to outside in the surface of mounting plate, wherein the first leveling layer is innermost layer, and the facing layer is outermost layer, and the heat preservation layer is composite insulation board, including inner layer's extruded polystyrene foam board and outer layer's phenolic foam board, and two layers are fixed by adhesive bonding between adhesive bonding.The utility model can adapt to cold and rainy area environment, reduce energy loss and water seepage problem.

The utility model relates to the technical field of air conditioner ventilation systems, in particular to a light high-strength phenolic aldehyde composite air conditioner air duct plate. The utility model provides a light high-strength phenolic aldehyde composite air conditioner air pipe plate which is of a multi-layer composite structure and comprises an outer protective layer, a reinforcing grid layer, a phenolic aldehyde foam core layer and a lining functional layer from bottom to top, and further comprises a stepped edge connecting structure which comprises a convex part and a concave part which can be wedged with each other. The light weight, high structural strength, high sealing performance, wear resistance, corrosion resistance, sound insulation, noise reduction, moisture resistance, bacteria resistance, heat insulation and fire prevention functions are comprehensively integrated, rapid installation of the plate can be achieved through the stepped edge connecting structure, and tool benefits are remarkably improved.