Smoke-resistant powder coating

Abstract

The invention discloses a smoke-resistant powder coating, and relates to the technical field of coatings. Comprising an adhesion layer, a stabilizing layer, a surface coated on the adhesion layer, a wear-resistant layer and a surface coated on the stabilizing layer, a plurality of notches are reserved in the wear-resistant layer in the process of coating the surface of the stabilizing layer, the notches are uniformly distributed in the wear-resistant layer at equal intervals, and the wear-resistant layer is coated on the surface of the stabilizing layer. And an expansion filler is pre-embedded in each notch. When any one or two conditions of a high-temperature environment or a smog environment occur, filling liquid is permeated into the stable layer or the wear-resistant layer through the filling notch by expansion filling, so that a layer of protective barrier is formed, micro cracks and pores in the coating are filled, and the wear resistance of the coating is improved. And further penetration of smoke and heat can be effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, in particular to a smoke-resistant powder coating. Background Art

[0002] In mine pipes, due to the dual effects of smoke and high temperature environment, traditional coating materials often cannot meet the needs of long-term use. Under the dual effects of smoke and high temperature, existing coating materials are prone to peeling, cracking and other problems, which greatly shortens the service life of mine pipes. Therefore, a smoke-resistant powder coating is needed.

[0003] After searching, the Chinese utility model patent with publication number "CN207416148U" discloses "a double-layer wear-resistant coating using a tortoise shell mesh". The double-layer wear-resistant coating using a tortoise shell mesh in this application has a simple structure and effectively protects the vessel wall. There is no need to set mud grabs inside the tortoise shell mesh, which avoids mud grabs that injure fingers during construction and protects the personal safety of workers.

[0004] In addition, the Chinese utility model patent with publication number "CN214774420U" discloses a "coating structure with wear-resistant and mildew-proof coating". This application enhances the alkali resistance and waterproof, moisture-proof and mildew-proof properties of the texture paint surface layer and the texture paint middle layer by setting an anti-alkali penetration base layer. By setting a UV adhesive layer, the adhesion strength of the texture paint surface layer is enhanced and the probability of the texture paint surface layer falling off is reduced. By setting a mesh cloth, the adhesion strength of the texture paint surface layer is further enhanced and the probability of cracking of the texture paint surface layer is reduced.

[0005] However, the above-mentioned disclosed patents and similar patents still have some limitations in actual use in the scenario of mine pipelines. For example, although the double-layer wear-resistant coating of the tortoise shell mesh improves the wear resistance to a certain extent, the durability of the coating may still be affected in a high-temperature smoke environment. Although the coating structure with wear-resistant and mildew-proof coating performs well in alkali resistance and waterproof and moisture-proof, its heat resistance in a high-temperature smoke environment still needs to be further improved. Therefore, the applicant proposes a new type of smoke-resistant powder coating to solve the above-mentioned problems. Summary of the invention

[0006] The object of the present invention is to provide a smoke-resistant powder coating to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a smoke-resistant powder coating, applied to a mine pipeline, comprising: Adhesion layer, used to coat the inner wall of mine pipe; A stabilizing layer, used for coating on the surface of the adhesion layer; A wear-resistant layer, used for coating the surface of the stabilizing layer; During the coating process of the wear-resistant layer on the surface of the stabilizing layer, a plurality of notches are reserved, and the plurality of notches are evenly and equidistantly distributed in the wear-resistant layer; An expansion filler is embedded in each slot. When either or both of a high temperature environment or a smoky environment occur, the expansion filler expands and penetrates the filling liquid into either or both of the stabilizing layer or the wear-resistant layer through filling the slot.

[0008] As a further preferred embodiment of the present technical solution, the contact surface between the adhesion layer and the inner wall of the mine pipe is in a concave-convex texture form, and the concave-convex texture form is used to increase the adhesion between the adhesion layer and the inner wall of the mine pipe.

[0009] As a further preferred embodiment of the present technical solution, the interior of the stabilizing layer is a honeycomb porous structure, the honeycomb porous structure is used to absorb the filling liquid and form a support grid, and the support grid is used to increase the contact points with the wear-resistant layer.

[0010] As a further preferred embodiment of the present technical solution, the notch is connected to the honeycomb porous structure, and the filling liquid can penetrate into the interior of the honeycomb porous structure from the notch.

[0011] As a further preferred embodiment of the present technical solution, the material of the stabilizing layer is a corrosion-resistant filler for resisting the invasion of smoke and corrosive gases; The corrosion-resistant filler comprises: 27%-44% epoxy resin, used to resist acidic gases and corrosive substances in smoke; 8%-13% silicate, used to maintain stability in high temperature smoke environment and prevent coating from peeling; 12%-28% polyurethane, which provides elasticity and abrasion resistance and absorbs thermal stress; 4%-7% ceramic particles are used to ensure the high temperature resistance and wear resistance of the coating; 20%-25% of either nano-alumina or nano-carbon tubes or a mixture of both to enhance corrosion resistance to smoke.

[0012] As a further preferred embodiment of the present technical solution, the material of the adhesion layer includes: 50%-70% of a high molecular polymer substrate, used to provide adhesion and flexibility, wherein the high molecular polymer substrate is any one of polyethylene and polypropylene; 10%-15% silicate is used to ensure the high temperature resistance of the adhesion layer and prevent the coating from peeling off or failing in a high temperature smoke environment; 12%-14% aluminum oxide, used to ensure the hardness, wear resistance and corrosion resistance of the adhesion layer; 1%-8% of nano-silicon dioxide is used to increase the scratch resistance and weather resistance of the adhesion layer. Due to its nano-scale structure, the nano-silicon dioxide can form a microstructure in the adhesion layer, and the microstructure is used to further ensure the adhesion and corrosion resistance of the adhesion layer.

[0013] As a further preferred embodiment of the present technical solution, the material of the wear-resistant layer includes: 30%-50% of ceramic particles, used to resist mechanical wear and particle impact encountered in the mine pipeline, the ceramic particles are one or a combination of at least two materials selected from the group consisting of aluminum oxide, silicon carbide and silicon nitride; 20%-30% wear-resistant resin, used to bond the ceramic particles together to form a uniform protective layer and provide the wear-resistant layer with flexibility and impact resistance; 20%-50% of the reinforcing fibers are used to form a mesh structure inside the wear-resistant layer, and the mesh structure is used to disperse and withstand external stress. The reinforcing fibers include: any one or two of glass fibers and carbon fibers.

[0014] As a further preferred embodiment of the present technical solution, the material of the filling liquid includes: 70%-90% of the high molecular polymer is used to penetrate into the stabilizing layer or the wear-resistant layer when the expansion filling is heated and expanded to fill the tiny pores. The high molecular polymer is any one of polyvinyl alcohol and polyacrylate; 10%-30% of functional additives are used to ensure the service life of the filling liquid, and the functional additives include: preservatives, antioxidants and thickeners.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The smoke-resistant powder coating forms a protective barrier by expanding and filling the filling liquid into the stabilizing layer or the wear-resistant layer through the filling slot when either or both of the high temperature environment or the smoke environment occur, thereby filling the tiny cracks and pores in the coating and effectively preventing further penetration of smoke and heat; At the same time, due to the uniform distribution of the notches, the overall stress on the coating is more uniform, avoiding local damage caused by stress concentration; In addition, by adopting a combination of corrosion-resistant fillers and high molecular polymer substrates, the powder coating of the present invention not only has excellent high temperature resistance and wear resistance, but also has good corrosion resistance and flexibility, thereby providing longer-term protection in harsh environments such as mine pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram of a method for preparing a smoke-resistant powder coating according to the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Inside mine pipes, due to the presence of smoke and high temperatures, the durability and protective performance of the coating are particularly important. In order to meet the challenges of these harsh environments, it is crucial to develop a powder coating with smoke resistance to ensure long-term and effective protection under extreme conditions.

[0019] It should be noted that when preparing the smoke-resistant powder coating proposed in this application, first, the adhesion layer is coated on the inner wall of the mine pipe, and its main function is to ensure good adhesion between the coating and the inner wall of the pipe. In order to achieve this goal, the material selection and design of the adhesion layer have been carefully considered. The material of the adhesion layer mainly includes 50%-70% of a polymer substrate, which can provide good adhesion and flexibility. The polymer substrate can be any one of polyethylene or polypropylene, and can remain stable in a high-temperature smoke environment to prevent the coating from peeling off or failing. In addition, it also includes 10%-15% of silicate to ensure the high temperature resistance of the adhesion layer in a high-temperature smoke environment. There is also 12%-14% alumina to ensure that the adhesion layer has sufficient hardness, wear resistance and corrosion resistance. In addition, 1%-8% nano-silicon dioxide is added to increase the scratch resistance and weather resistance of the adhesion layer. Nano-silicon dioxide, due to its nano-scale structure, can form a microstructure in the adhesion layer, further ensuring the adhesion and corrosion resistance of the coating. In order to enhance the adhesion, the contact surface between the adhesion layer and the inner wall of the mine pipe is designed with a concave and convex texture, which helps to increase the adhesion between the adhesion layer and the inner wall of the mine pipe.

[0020] Next, the stabilizing layer is coated on the surface of the adhesion layer, and its internal structure is honeycomb porous. This structure not only helps to absorb the filling liquid, but also forms a support grid to increase the contact points with the wear-resistant layer. The material of the stabilizing layer is mainly corrosion-resistant filler, which is used to resist the invasion of smoke and corrosive gases. This corrosion-resistant filler includes 27%-44% epoxy resin to resist acidic gases and corrosive substances in smoke, and also includes 8%-13% silicate to maintain stability in high-temperature smoke environment and prevent coating peeling. In addition, there are 12%-28% polyurethane to provide elasticity and wear resistance and absorb thermal stress. It should be noted that 4%-7% ceramic particles are also included to ensure the high temperature and wear resistance of the coating. Finally, by adding 20%-25% of a mixture of nano-alumina or nano-carbon tubes, it can be used to enhance the corrosion resistance of the coating to smoke. This honeycomb porous structure of the stabilizing layer can not only absorb the filling liquid, but also form a support grid to increase the contact points with the wear-resistant layer.

[0021] Finally, the wear-resistant layer is coated on the surface of the stabilizing layer. During the coating process, the wear-resistant layer reserves a number of equidistant and evenly distributed slots, in which expansion fillings are embedded. When encountering a high temperature environment or a smoke environment, or both, the expansion fillings will expand and penetrate the filling liquid into the stabilizing layer or the wear-resistant layer through the slots. The material of the wear-resistant layer mainly includes 30%-50% of ceramic particles, which can be one or a combination of at least two materials among aluminum oxide, silicon carbide and silicon nitride, and are used to resist mechanical wear and particle impact encountered in mine pipelines. In addition, it also includes 20%-30% of wear-resistant resin, which is used to bond the ceramic particles together to form a uniform protective layer and provide flexibility and impact resistance to the wear-resistant layer. There are also 20%-50% of reinforcing fibers, which are used to form a mesh structure inside the wear-resistant layer. This structure can disperse and withstand external stress. The reinforcing fibers can be any one or two of glass fibers and carbon fibers. The slots are connected to the honeycomb porous structure, so that the filling liquid can penetrate from the slots into the interior of the honeycomb porous structure.

[0022] It should be added that, in this embodiment, when the smoke-resistant powder coating is actually coated on the inner wall of the mine pipe, the specific operation is as follows: First, the inner surface of the mine pipeline needs to be thoroughly cleaned and pre-treated to ensure that the coating can firmly adhere to the inner wall of the pipe. This usually includes removing impurities such as grease, dust and oxides on the surface, and then performing treatments such as sandblasting or pickling to increase the surface roughness, thereby increasing the adhesion of the coating to the inner wall of the pipe.

[0023] After cleaning and pretreatment, the powder coating of the adhesion layer is evenly sprayed on the inner wall of the mine pipe. During the spraying process, special spraying equipment, such as an electrostatic spray gun, is required to ensure that the powder coating can be evenly covered on the inner wall of the pipe. After spraying, the adhesion layer needs to be baked and cured to form a hard and highly adhesive base layer.

[0024] The stabilizing layer is then coated on the cured adhesion layer. The powder coating of the stabilizing layer is also evenly sprayed using electrostatic spraying technology and forms a honeycomb porous structure during the baking process. This structure not only helps the bonding between the stabilizing layer and the wear-resistant layer, but also absorbs the filling liquid in the subsequent process, further enhancing the overall performance of the coating.

[0025] Finally, the powder coating of the wear-resistant layer is sprayed on the stabilizing layer, and equidistant and evenly distributed grooves are reserved. After the wear-resistant layer is cured, the embedded expansion fillers in the grooves are filled to prepare for expansion in high temperature or smoke environment, and the filling liquid penetrates into the coating, thereby enhancing the protective performance of the coating.

[0026] It should be further explained that, in the present embodiment, when preparing the three coatings, namely the adhesion layer, the stabilization layer and the wear-resistant layer, the required components of the adhesion layer, the stabilization layer and the wear-resistant layer are mixed evenly in proportion, and then made into powder particles through a high-temperature melt extrusion process. During the preparation process, the temperature and time need to be strictly controlled to ensure the uniformity and quality of the powder particles. In addition, the powder particles are subsequently screened and graded to obtain a particle size range suitable for spraying. It should be explained that after the powder particles are prepared, the powder needs to be dried before electrostatic spraying to remove moisture therein and prevent agglomeration during the spraying process.

[0027] In this embodiment, the filling liquid is mainly composed of 70%-90% high molecular polymers. When the expansion filling is heated and expanded, the high molecular polymers can effectively penetrate into the stabilizing layer or the wear-resistant layer to fill the tiny pores therein, thereby improving the stability and durability of the overall structure. The choice of high molecular polymers includes but is not limited to any one of polyvinyl alcohol and polyacrylate. Both materials have good physical and chemical stability and can meet the use requirements of expansion filling in different environments.

[0028] Specifically, when the filling liquid is mainly composed of polyvinyl alcohol, polyvinyl alcohol can form a stable network structure at high temperature, effectively preventing cracks in the coating caused by thermal stress. When polyacrylate is the main component, the adhesive properties of polyacrylate further enhance the bonding force between the coating and the substrate, ensuring that the coating is not easy to fall off during long-term use. In addition, in actual use, 5%-15% of a cross-linking agent can be added to the filling liquid to promote the cross-linking reaction between high molecular polymers, thereby improving the mechanical strength and chemical resistance of the coating.

[0029] In order to further ensure the service life of the filling liquid, the present application also adds 10%-30% of functional additives to the filling liquid. These functional additives include preservatives, antioxidants and thickeners, etc., and can effectively prevent the filling liquid from undergoing chemical reactions or physical changes during use, thereby extending its service life. The preservative can prevent the filling liquid from deteriorating due to the action of microorganisms, the antioxidant can prevent the filling liquid from being degraded due to oxidation, and the thickener can adjust the viscosity of the filling liquid so that it is more evenly distributed during the expansion process.

[0030] In addition, it should be added that the reference Figure 1 It can be seen that when preparing a smoke-resistant powder coating proposed in the present application, the preparation steps include step S100 to step S700.

[0031] Step S100: preparing raw materials for smoke-resistant powder coating.

[0032] It should be understood that step S100 is used to prepare the raw materials required for each layer.

[0033] Specifically, the adhesion layer: polyethylene (PE), polypropylene (PP), silicate, alumina, nano silicon dioxide.

[0034] Stabilizing layer: epoxy resin, polyurethane, silicate, ceramic particles and nano-alumina.

[0035] Wear-resistant layer: ceramic particles (such as aluminum oxide, silicon carbide and silicon nitride), wear-resistant resin, reinforcing fibers (glass fiber and carbon fiber).

[0036] Expanding fillers: high molecular polymers (such as polyvinyl alcohol, polyacrylate) and functional additives (preservatives, antioxidants, thickeners).

[0037] In addition, it should be noted that necessary raw material processing is required after raw material preparation: Among them, polymer materials and fillers need to be screened and dried to ensure the purity and dry state of the materials. Ceramic particles and nanomaterials need to be adjusted in particle size through special particle size screening equipment to meet the uniformity requirements of the coating.

[0038] Furthermore, it should be added that in step S100, the equipment used includes a vibrating screen, a drying equipment (such as an oven) and a polymer material mixer.

[0039] Specifically, the vibrating screen is used to screen polymer materials and fillers to remove impurities and ensure uniform particle size distribution. The drying equipment is used to remove moisture from the materials to ensure the stability of the raw materials during subsequent processing. The polymer raw material mixer is responsible for mixing different raw materials in a specific proportion to provide a homogeneous raw material mixture for the next step of coating preparation. After the raw material preparation and processing are completed, the raw material will enter the next step S200, that is, mixing and melting the raw materials to form a uniform coating mixture.

[0040] Step S200: preparing an adhesion layer.

[0041] It should be understood that the preparation process of the adhesion layer in step S200 includes steps S210 to S230.

[0042] Step S210: Mixing the polyethylene or polypropylene substrate with other additives (silicate, alumina, nano-silicon dioxide) according to a set ratio.

[0043] Specifically, in step S200, the ratio is set as follows: 50%-70% of the high molecular polymer substrate, 10%-15% of the silicate, 12%-14% of the aluminum oxide, and 1%-8% of the nano-silicon dioxide.

[0044] Step S220: Use an extruder to perform high-temperature melting treatment to evenly mix the polymer materials and maintain the melting temperature between 180°C and 220°C.

[0045] Step S230: After extrusion, the mixture is cooled into a film by a cooling device and cut into particles suitable for powder coating.

[0046] Specifically, in step S230, the cooling device is a cooling drum, and the surface temperature of the cooling drum is controlled between 30°C and 50°C to ensure that the mixture can be cooled quickly and maintain a good physical form.

[0047] Step S300: preparing a stabilization layer.

[0048] It should be clear that the preparation process of the stabilization layer in step S300 includes: step S310 to step S340.

[0049] Specifically, step S310: epoxy resin, polyurethane, ceramic particles and other corrosion-resistant additives (such as nano-alumina, silicate) are mixed in proportion.

[0050] It should be noted that the ratio in step S310 is 27%-44% epoxy resin, 8%-13% silicate, 12%-28% polyurethane, 4%-7% ceramic particles and 20%-25% of any one or a mixture of two of nano-alumina or nano-carbon tubes.

[0051] Step S320: Use a high-speed mixer to evenly mix the raw materials to ensure complete fusion of the resin and the particles.

[0052] It should be noted that in step S320, the operating parameter of the high-speed mixer is 1000-2000 rpm.

[0053] Step S330: subjecting the mixture to a thermal curing treatment, with the curing temperature controlled at 150-180° C. for 30-60 minutes, until a stable honeycomb porous structure is formed.

[0054] Step S340: the solidified stabilization layer is granulated and cut into powder particles suitable for subsequent coating.

[0055] It should be clear that the granulation process in step S340 is specifically carried out through a vibrating screen in the prior art to ensure the uniformity and consistency of the particles. In step S340, the selection of the mesh aperture of the vibrating screen is crucial. Usually, a mesh that can pass through powder particles but retain larger particles is selected to ensure that the particle size distribution of the final product meets the coating requirements. After completing step S300, the raw material will enter step S400, i.e., the preparation of the wear-resistant layer.

[0056] Step S400: preparing a wear-resistant layer.

[0057] It should be clear that the preparation process of the wear-resistant layer in step S400 includes: step S410 to step S430.

[0058] Step S410: Ceramic particles (such as aluminum oxide, silicon carbide), wear-resistant resin and reinforcing fibers are mixed in proportion.

[0059] Specifically, the ratio in step S410 is 30%-50% of ceramic particles, 20%-30% of wear-resistant resin, and 20%-50% of reinforcing fibers.

[0060] Step S420: Use a high temperature mixer to heat the raw materials to 220-260° C. to fully melt the resin and evenly disperse the ceramic particles and fibers.

[0061] Step S430: After the mixture is cooled, it is crushed and pulverized to obtain particles suitable for powder coating.

[0062] It should be clear that the crushing and pulverizing process in step S430 uses a crusher. The operating parameter value of the crusher in step S430 is that the rotation speed of the crusher is set between 1000-1500 revolutions per minute to ensure the uniformity of the particles. At the same time, the mesh aperture of the crusher should be selected according to the requirements of the final particle size. In this application, it is 0.5 to 2 mm to meet the particle size requirements of powder coating. After completing the crushing and pulverizing process, the particles will be screened to remove particles that are too fine or too coarse to ensure the uniformity and quality of the coating.

[0063] Step S500: Preparation of filling liquid (expansion filler).

[0064] It should be understood that the preparation process of the filling liquid (expansion filler) in step S500 includes: step S510 to step S530.

[0065] Step S510: Mixing high molecular polymer (such as polyvinyl alcohol, polyacrylate) and functional additives (preservatives, antioxidants, thickeners) in proportion.

[0066] Specifically, the ratio in step S510 is 70%-90% of the high molecular polymer and 10%-30% of the functional additive.

[0067] Step S520: uniformly stir the raw materials in a mixer to ensure that the high molecular polymer is completely dissolved.

[0068] It should be noted that the parameter value of the mixer during operation in step S520 is that the speed is set between 500-800 revolutions per minute to ensure the uniformity of the mixture. During the stirring process, the temperature must also be controlled at 60-80°C to promote the dissolution of the polymer and the uniform dispersion of the functional additives. It should be noted that after the stirring is completed, the mixture is filtered to remove undissolved impurities and particles to ensure the purity of the filling liquid.

[0069] Step S530: The mixed solution is heated to 60-80° C. and maintained for a certain period of time to ensure the dissolution and expansion effects.

[0070] Step S600: coating and interlayer curing.

[0071] It should be clear that in step S600, coating application and interlayer curing include: Adhesion layer coating: Use spraying equipment to evenly coat the adhesion layer powder on the inner wall of the mine pipe. The coating thickness is controlled at 100-150μm and the spraying temperature is 180-200℃.

[0072] Stabilizing layer coating: Spray the stabilizing layer powder evenly on the surface of the adhesion layer, and the coating thickness is controlled at 150-200μm. After the stabilizing layer is coated, it needs to be thermally cured, the temperature is controlled at 180-200℃, and the curing time is 30-60min.

[0073] Wear-resistant layer coating: The wear-resistant layer powder is coated on the surface of the stabilizing layer by spraying or salivation process, the coating thickness is controlled at 200-300μm, and the spraying temperature is maintained at 200-220℃.

[0074] S700: Addition of expansion filler.

[0075] It should be noted that the steps of adding the expansion filler include: step S710 to step S730.

[0076] Step S710: when coating the wear-resistant layer, an expansion filler needs to be embedded in the groove in advance.

[0077] Step S720: The expandable filler expands under high temperature conditions and penetrates into the tiny pores of the stabilizing layer or the wear-resistant layer to perform self-repair.

[0078] Step S730: Confirm through microscopic inspection that the filling material in the slot is evenly distributed to ensure the integrity and effect of the expansion filling.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A smoke-resistant powder coating for use in mine pipes, characterized in that: include: Adhesion layer, used to coat the inner wall of mine pipe; A stabilizing layer, used for coating on the surface of the adhesion layer; A wear-resistant layer, used for coating the surface of the stabilizing layer; During the coating process of the wear-resistant layer on the surface of the stabilizing layer, a plurality of notches are reserved, and the plurality of notches are evenly and equidistantly distributed in the wear-resistant layer; An expansion filler is embedded in each slot. When either or both of a high temperature environment or a smoky environment occur, the expansion filler expands and penetrates the filling liquid into either or both of the stabilizing layer or the wear-resistant layer through filling the slot.

2. A smoke-resistant powder coating according to claim 1, characterized in that: The contact surface between the adhesion layer and the inner wall of the mine pipeline is in a concave-convex texture form, and the concave-convex texture form is used to increase the adhesion between the adhesion layer and the inner wall of the mine pipeline.

3. A smoke-resistant powder coating according to claim 1, characterized in that: The interior of the stabilizing layer is a honeycomb porous structure, which is used to absorb the filling liquid and form a support grid, which is used to increase the contact points with the wear-resistant layer.

4. A smoke-resistant powder coating according to claim 3, characterized in that: The notch is connected to the honeycomb porous structure, and the filling liquid can penetrate into the interior of the honeycomb porous structure from the notch.

5. A smoke-resistant powder coating according to claim 4, characterized in that: The material of the stabilizing layer is corrosion-resistant filler, which is used to resist the invasion of smoke and corrosive gas; The corrosion-resistant filler comprises: 27%-44% epoxy resin, used to resist acidic gases and corrosive substances in smoke; 8%-13% silicate, used to maintain stability in high temperature smoke environment and prevent coating from peeling; 12%-28% polyurethane, which provides elasticity and abrasion resistance and absorbs thermal stress; 4%-7% ceramic particles are used to ensure the high temperature resistance and wear resistance of the coating; 20%-25% of either nano-alumina or nano-carbon tubes or a mixture of both to enhance corrosion resistance to smoke.

6. A smoke resistant powder coating according to claim 1, characterized in that: The materials of the adhesion layer include: 50%-70% of a high molecular polymer substrate, used to provide adhesion and flexibility, wherein the high molecular polymer substrate is any one of polyethylene and polypropylene; 10%-15% silicate is used to ensure the high temperature resistance of the adhesion layer and prevent the coating from peeling off or failing in a high temperature smoke environment; 12%-14% aluminum oxide, used to ensure the hardness, wear resistance and corrosion resistance of the adhesion layer; 1%-8% of nano-silicon dioxide is used to increase the scratch resistance and weather resistance of the adhesion layer. Due to its nano-scale structure, the nano-silicon dioxide can form a microstructure in the adhesion layer, and the microstructure is used to further ensure the adhesion and corrosion resistance of the adhesion layer.

7. A smoke-resistant powder coating according to claim 1, characterized in that: The materials of the wear-resistant layer include: 30%-50% of ceramic particles, used to resist mechanical wear and particle impact encountered in the mine pipeline, the ceramic particles are one or a combination of at least two materials selected from the group consisting of aluminum oxide, silicon carbide and silicon nitride; 20%-30% wear-resistant resin, used to bond the ceramic particles together to form a uniform protective layer and provide the wear-resistant layer with flexibility and impact resistance; 20%-50% of the reinforcing fibers are used to form a mesh structure inside the wear-resistant layer, and the mesh structure is used to disperse and withstand external stress. The reinforcing fibers include: any one or two of glass fibers and carbon fibers.

8. The smoke-resistant powder coating according to claim 1, characterized in that: The materials of the filling liquid include: 70%-90% of the high molecular polymer is used to penetrate into the stabilizing layer or the wear-resistant layer when the expansion filling is heated and expanded to fill the tiny pores. The high molecular polymer is any one of polyvinyl alcohol and polyacrylate; 10%-30% of functional additives are used to ensure the service life of the filling liquid, and the functional additives include: preservatives, antioxidants and thickeners.

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