Preparation method of hard PVC and metal thermal passivation composite alloy roofing slate capable of being subjected to cold press molding

Abstract

A preparation method of a hard PVC and metal thermal passivation composite alloy roofing slate capable of being subjected to cold press molding belongs to the field of metal roofing slate, and comprises the following steps: step 1, preparing a hard PVC board; 2, performing thermal passivation compounding on the bottom of the hard PVC plate and the metal plate through a high-molecular thermal passivation compound adhesive; 3, the top of the hard PVC board and the tensile weather-resistant color film are subjected to thermal passivation compounding, and therefore a composite alloy board is obtained; and fourthly, the composite alloy plate is subjected to cold pressing to be in a specified shape according to product requirements, and the composite alloy roofing slate is obtained. The tile has the advantages that the tile is harder and higher in strength, has good combustion resistance and high temperature resistance, is not influenced by environment temperature change, keeps no collapse and no deformation when dealing with high-temperature weather, and ensures long-term normal use and attractiveness; 2, the tile surface is easy to clean, and dirty things can be washed away by rainwater after raining; and 3, the tile is high in impact resistance and has a remarkable effect on extremely large hail weather.

Description

Technical Field

[0001] This invention belongs to the field of metal roofing sheets, specifically a method for preparing a cold-pressed rigid PVC and metal heat-passivated composite alloy roofing sheet. Background Technology

[0002] Currently, most roofing tiles and fencing materials are made of color steel plates, fired tiles (including ceramic tiles, mud tiles, and glazed tiles), metal-coated tiles (including aluminum alloy tiles, stainless steel tiles, and color steel tiles), colored stone tiles, and resin tiles. Traditional hot-melt adhesive bonding below 130°C, room-temperature adhesive bonding, and combined hot-melt bonding processes for metal-plastic composite panels (including nano-boards, tin-plated boards, and resin-metal composite tiles) without passivation processes result in different thermal expansion and contraction ratios due to material variations. This makes them prone to cracking, delamination, and separation under sustained high temperatures and direct sunlight, leading to product instability. Firing materials are extremely wasteful of land and non-renewable resources, installation is time-consuming and labor-intensive, and they lack resistance to hail impacts in extreme hailstorms. Metal-coated tiles have strong hail resistance but are not corrosion-resistant, fade easily, produce significant noise in rainy weather, and are easily blown away in strong winds, causing safety issues. Colored stone tiles are prone to sand shedding over time. Resin tiles offer good sound insulation and heat insulation, but their high coefficient of thermal expansion and contraction makes installation too demanding. Moreover, most of the tiles lack an anti-slip layer on their surface, resulting in a lack of anti-slip measures for construction safety. Summary of the Invention

[0003] This invention provides a method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet, in order to overcome the defects in the prior art.

[0004] This invention is achieved through the following technical solution: A method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy roof tile includes the following steps: Step 1: Prepare rigid PVC board; Step 2: Apply a high-polymer thermal passivation composite adhesive to the bottom of the rigid PVC board and then thermally passivate it to the metal board. Step 3: The top of the rigid PVC board is thermally passivated and laminated with a tensile-resistant and weather-resistant color film to obtain a composite alloy board; Step 4: According to product requirements, the composite alloy plate is cold-pressed into the specified shape to obtain the composite alloy tile.

[0005] The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet as described above, wherein the thickness of the metal sheet is 1.5-2.0 mm, the thickness of the adhesive layer formed by the polymer heat-passivated composite adhesive is 0.06-0.12 mm, the thickness of the rigid PVC sheet is 1.3-1.7 mm, and the thickness of the tensile-resistant weather-resistant color film is 0.1-0.2 mm; The metal plate is any one of aluminum alloy plate, aluminized zinc plate, and galvanized steel plate; The tensile-strength polymer hot melt adhesive comprises the following components in parts by weight: 3 parts rosin, 9 parts petroleum resin, 11 parts terpene resin, 3000.9 parts antioxidant, 8 parts vinyl acetate, 26 parts polymethyl methacrylate, and 36 parts polyethylene. The tensile-resistant and weather-resistant color film comprises the following components in parts by weight: 8 parts acrylonitrile, 13 parts styrene, 6 parts phenylpropionic acid, 16 parts high-temperature resistant adhesive powder, 32 parts PVC, 1.1 parts antioxidant, 0.4 parts light stabilizer, and 5 parts UV-resistant and weather-resistant color powder.

[0006] The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy roof tile, as described above, includes the following steps: Step 1: Weigh the following according to the formula: carbon black, calcium carbonate mineral powder, silicate mineral powder, recycled PVC material powder, ACR resin, CPE resin, XT-2 rare earth stabilizer, high-temperature resistant solid stearic acid, and solid PE wax. Step 2: The raw materials weighed in Step 1 are conveyed to the mixing pot by the conveying mechanical device and stirred evenly. During the stirring process, the raw materials will generate a heating effect due to mutual friction and friction with the blades. The temperature is controlled at 125℃. Step 3: After the raw materials in Step 2 are mixed evenly, they are placed in the storage device and then sent into the barrel of the twin-screw plastic extruder by the mechanical conveying device for high-temperature plasticization. After plasticization, the mixture is first combined through the confluence core and then extruded into the flat molding die. After entering the die, the molten mixture is extruded into a flat shape by the extrusion pressure of the twin-screw extruder barrel and then extruded. After cooling and solidification, a rigid PVC board is obtained.

[0007] The preparation method of the cold-pressable rigid PVC and metal heat passivation composite alloy tile as described above, wherein the mass parts of each substance in step 1 are: 1 part carbon black, 17 parts calcium carbonate mineral powder, 17 parts silicate mineral powder, 200 parts recycled PVC material powder, 2 parts ACR resin, 6 parts CPE resin, 5 parts XT-2 type rare earth stabilizer, 1 part high temperature resistant solid stearic acid, and 1 part solid PE wax. The particle size of the calcium carbonate mineral powder is 800-3500 mesh; The particle size of the silicate mineral powder is 800-3500 mesh; The recycled PVC material powder has a particle size of 300-500 mesh and is obtained by recycling and washing PVC products and then crushing them. The PVC material content is more than 90%. If it is less than 90%, PVC material particles need to be added to make the PVC material content more than 90%. The solid PE wax has a melting point higher than 95°C.

[0008] As described above, in the preparation method of a cold-pressable rigid PVC and metal heat-passivated composite alloy tile, the twin-screw extruder in step 3 includes seven heating temperature control zones. The seven heating temperature control zones are, in order, the feeding zone, the stirring zone, the conical extrusion zone, the confluence core zone, the confluence core and die connection zone, and the die zone. The temperature control ranges of the seven heating temperature control zones are, in order, 175℃, 180℃, 178℃, 180℃, 185℃, 190℃, and 200℃-210℃.

[0009] As described above, in the preparation method of a cold-pressable rigid PVC and metal heat-passivated composite alloy tile, in step two, a tensile-resistant polymer hot melt adhesive is uniformly applied to the surface of the metal plate. Then, the rigid PVC board is placed on the surface of the metal plate and the surface of the metal plate is heated to a temperature controlled at 165-200℃. Subsequently, the rigid PVC board and the metal plate are composited by a pressure roller. The roller is pressed until the temperature drops below 130℃, then the rolling is stopped and the plate is air-cooled to room temperature to complete the composite of the rigid PVC board and the metal plate.

[0010] The preparation method of a cold-pressable rigid PVC and metal heat passivation composite alloy tile sheet as described above, in step three, after the tensile-resistant weather-resistant color film is bonded to the top of the rigid PVC sheet, the heating temperature is controlled at 100-130℃, followed by pressure bonding with a pressure roller, and then cooling to room temperature to complete the bonding of the tensile-resistant weather-resistant color film and the rigid PVC sheet.

[0011] As described above, in the preparation method of a cold-pressable rigid PVC and metal heat-passivated composite alloy tile, the cold pressing operation in step four involves rolling and forming. Specifically, the coiled composite sheet is unwound by an unwinding machine and fed into the wheel rolling and forming area of ​​the forming machine for preliminary forming. The principle of wheel rolling is that the pressure roller rotates during the rolling process. Under the action of pressure and the rolling force of the pressure roller, the sheet moves forward automatically and is pressed into a longitudinal S-shaped tile.

[0012] The preparation method of a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet as described above, in step four, after the product is cold-pressed and rolled, it is processed by stamping. The specific operation is as follows: after preliminary rolling, it is stamped again. When the S-shaped tile sheet enters the stamping area, it is stamped again to form a bamboo-joint tile shape. The pitch of each section can be adjusted arbitrarily. The optimal pitch length is 15-30 cm, because too long or too short will affect the overall appearance of the tile.

[0013] The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile, as described above, involves the tile entering a conveyor belt-type heat treatment zone after forming. The heat treatment process heats the surface layer, enabling the tensile-resistant and weather-resistant color film to perform self-repair function, thus making the surface color more stable.

[0014] The advantages of this invention are: 2. The tiles of this invention are harder and stronger, with good fire resistance and high temperature resistance. They are not affected by changes in ambient temperature, and can remain undamaged and undeformed in high-temperature weather, ensuring long-term normal use and aesthetics. 2. The roof tiles of this invention are easy to clean; dirt can be washed away by rainwater after rain. 3. The tiles of this invention have high impact resistance and are effective against extreme hailstorms; 4. The tiles of this invention have extremely strong corrosion resistance and excellent resistance to corrosive substances such as acids and alkalis; 5. In this invention, the winding process followed by pressing makes transportation and storage more convenient and saves more space. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the schematic diagrams of the performance test report of the composite alloy tile prepared according to an embodiment of the present invention; Figure 2 This is the second schematic diagram of the performance test report of the composite alloy tile prepared according to an embodiment of the present invention; Figure 3 This is the third schematic diagram of the performance test report of the composite alloy tile prepared according to the embodiments of the present invention; Figure 4 This is the fourth schematic diagram of the performance test report of the composite alloy tile prepared according to the embodiments of the present invention; Figure 5 This is the fifth schematic diagram of the performance test report of the composite alloy tile prepared according to the embodiments of the present invention; Figure 6 This is the sixth schematic diagram of the performance test report of the composite alloy tile prepared in the embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] A method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy roof tile includes the following steps: Step 1: Prepare rigid PVC board; Step 2: Apply a high-polymer thermal passivation composite adhesive to the bottom of the rigid PVC board and then thermally passivate it to the metal board. Step 3: The top of the rigid PVC board is thermally passivated and laminated with a tensile-resistant and weather-resistant color film to obtain a composite alloy board; Step 4: According to product requirements, the composite alloy plate is cold-pressed into the specified shape to obtain the composite alloy tile.

[0019] Preferably, in this embodiment, the thickness of the metal plate is 1.5-2.0 mm, the thickness of the adhesive layer formed by the polymer thermal passivation composite adhesive is 0.06-0.12 mm, the thickness of the rigid PVC plate is 1.3-1.7 mm, and the thickness of the tensile-resistant weather-resistant color film is 0.1-0.2 mm. The metal plate is any one of aluminum alloy plate, aluminized zinc plate, and galvanized steel plate; The tensile-strength polymer hot melt adhesive comprises the following components in parts by weight: 3 parts rosin, 9 parts petroleum resin, 11 parts terpene resin, 3000.9 parts antioxidant, 8 parts vinyl acetate, 26 parts polymethyl methacrylate, and 36 parts polyethylene. The tensile-resistant and weather-resistant color film comprises the following components in parts by weight: 8 parts acrylonitrile, 13 parts styrene, 6 parts phenylpropionic acid, 16 parts high-temperature resistant adhesive powder, 32 parts PVC, 1.1 parts antioxidant, 0.4 parts light stabilizer, and 5 parts UV-resistant and weather-resistant color powder.

[0020] Preferably, the method for preparing rigid PVC board in this embodiment includes the following steps: Step 1: Weigh the following according to the formula: carbon black, calcium carbonate mineral powder, silicate mineral powder, recycled PVC material powder, ACR resin, CPE resin, XT-2 rare earth stabilizer, high-temperature resistant solid stearic acid, and solid PE wax. Step 2: The raw materials weighed in Step 1 are conveyed to the mixing pot by the conveying mechanical device and stirred evenly. During the stirring process, the raw materials will generate a heating effect due to mutual friction and friction with the blades. The temperature is controlled at 125℃. Step 3: After the raw materials in Step 2 are mixed evenly, they are placed in the storage device and then sent into the barrel of the twin-screw plastic extruder by the mechanical conveying device for high-temperature plasticization. After plasticization, the mixture is first combined through the confluence core and then extruded into the flat molding die. After entering the die, the molten mixture is extruded into a flat shape by the extrusion pressure of the twin-screw extruder barrel and then extruded. After cooling and solidification, a rigid PVC board is obtained.

[0021] Preferably, the mass fractions of each substance in step 1 of this embodiment are as follows: 1 part carbon black, 17 parts calcium carbonate mineral powder (between 800 mesh and 3500 mesh), 17 parts silicate mineral powder (800 mesh and 3500 mesh), 200 parts recycled PVC material powder, 2 parts ACR resin, 6 parts CPE resin, 5 parts XT-2 type rare earth stabilizer, 1 part high-temperature resistant solid stearic acid, and 1 part solid PE wax. The particle size of the calcium carbonate mineral powder is 800-3500 mesh; The particle size of the silicate mineral powder is 800-3500 mesh; The recycled PVC material powder has a particle size of 300-500 mesh and is obtained by recycling and washing PVC products and then crushing them. The PVC material content is more than 90%. If it is less than 90%, PVC material particles need to be added to make the PVC material content more than 90%. The solid PE wax has a melting point higher than 95°C.

[0022] Preferably, in step 3 of this embodiment, the twin-screw extruder includes seven heating temperature control zones, which are, in order, the feeding zone, the stirring zone, the conical extrusion zone, the confluence core zone, the confluence core and die connection zone, and the die zone. The temperature control ranges of the seven heating temperature control zones are, in order, 175℃, 180℃, 178℃, 180℃, 185℃, 190℃, and 200℃-210℃.

[0023] Preferably, in step two of this embodiment, a tensile-resistant polymer hot melt adhesive is uniformly applied to the surface of the metal plate. Then, a rigid PVC board is placed on the surface of the metal plate and the surface of the metal plate is heated to a temperature controlled at 165-200°C. Subsequently, a pressure-combining operation using a roller press is used to combine the rigid PVC board and the metal plate. The roller press is stopped when the temperature drops below 130°C, and the plate is air-cooled to room temperature to complete the combination of the rigid PVC board and the metal plate.

[0024] Preferably, in step three of this embodiment, after the tensile-resistant weather-resistant color film is bonded to the top of the rigid PVC board, the heating temperature is controlled at 100-130℃, followed by pressure bonding with a pressure roller, and then cooling to room temperature to complete the bonding of the tensile-resistant weather-resistant color film and the rigid PVC board.

[0025] Preferably, in step four of this embodiment, the product cold pressing operation first involves rolling and forming. Specifically, the coiled composite board is unwound by an unwinding machine and enters the wheel rolling and forming area of ​​the forming machine for preliminary forming. The principle of wheel rolling is that the pressure roller rotates during the rolling process. Under the transmission of pressure and rolling force of the pressure roller, the board moves forward automatically and is pressed into a longitudinal S-shaped tile board (also called a transverse wavy fence wall board). Because the S-shape causes less stretching of the board, the stretching force is more uniform, and the board thickness is more uniform.

[0026] Preferably, in step four of this embodiment, the product is cold-pressed and rolled into shape, and then stamped for processing. The specific operation is as follows: after initial rolling and forming, it is stamped again. When the S-shaped tile sheet enters the stamping area, it is stamped again to form a bamboo-joint tile shape. The pitch of each section can be adjusted arbitrarily. The optimal pitch length is 15-30 cm, because too long or too short will affect the overall aesthetics of the tile. According to the characteristics of the material as a composite material, cold-pressing step-by-step forming can make the tile sheet flatter and more stable, which can effectively avoid the phenomenon of the tile sheet curling and twisting on both sides after being formed by heating forming technology, making the installation faster and more convenient, and the overall effect after installation and fixing is better flat.

[0027] Preferably, in this embodiment, after the tiles are formed, they enter a conveyor belt-type fire zone. The fire zone heats the surface, allowing the tensile-resistant and weather-resistant color film to perform its self-repair function, making the surface color more stable. The fire-spraying device is a downward spray type, and the size of the fire depends on the conveying speed. The faster the speed, the larger the flame, and vice versa.

[0028] Example Step 1: Prepare rigid PVC board; The preparation method of rigid PVC board includes the following steps: Step 1: Weigh the following according to the formula: carbon black, calcium carbonate mineral powder, silicate mineral powder, recycled PVC material powder, ACR resin, CPE resin, XT-2 rare earth stabilizer, high-temperature resistant solid stearic acid, and solid PE wax. Step 2: The raw materials weighed in Step 1 are conveyed to the mixing pot by the conveying mechanical device and stirred evenly. During the stirring process, the raw materials will generate a heating effect due to mutual friction and friction with the blades. The temperature is controlled at 125℃. Step 3: After the raw materials in Step 2 are mixed evenly, they are placed in the storage device and then sent into the barrel of the twin-screw plastic extruder by the mechanical conveying device for high-temperature plasticization. After plasticization, they are first combined through the confluence core and then extruded into the flat molding die. After entering the die, the molten mixture is extruded into a flat shape by the extrusion pressure of the twin-screw extruder barrel and extruded. After cooling and solidification, a rigid PVC board is obtained. The mass fractions of each substance in step 1 are as follows: 1 part carbon black, 17 parts calcium carbonate mineral powder (between 800 mesh and 3500 mesh), 17 parts silicate mineral powder (between 800 mesh and 3500 mesh), 200 parts recycled PVC material powder, 2 parts ACR resin, 6 parts CPE resin, 5 parts XT-2 type rare earth stabilizer, 1 part high temperature resistant solid stearic acid, and 1 part solid PE wax. The particle size of the calcium carbonate mineral powder is 800-3500 mesh. The particle size of the silicate mineral powder is 800-3500 mesh. The recycled PVC material powder has a particle size of 300-500 mesh and is obtained by recycling and washing PVC products and then crushing them. The PVC material content is 92.7%. Among them, the melting point of solid PE wax is higher than 95℃; In step 3, the twin-screw extruder includes seven heating temperature control zones, which are, in order, the feeding zone, the mixing zone, the conical extrusion zone, the confluence core zone, the confluence core and die connection zone, and the die zone. The temperature control ranges of the seven heating temperature control zones are, in order, 175℃, 180℃, 178℃, 180℃, 185℃, 190℃, and 200℃-210℃. Step 2: The bottom of the rigid PVC board is thermally passivated and bonded to the metal board using a high-polymer thermal passivation composite adhesive. The specific operation is as follows: a tensile-resistant high-polymer hot melt adhesive is evenly applied to the surface of the metal board. Then, the rigid PVC board is placed on the surface of the metal board and the surface of the metal board is heated to a temperature of 165-200℃. Subsequently, a pressure bonding operation is used to bond the rigid PVC board and the metal board. The rolling is stopped when the temperature drops below 130℃. After air cooling to room temperature, the bonding of the rigid PVC board and the metal board is completed. The metal sheet is an aluminized zinc plate; The tensile-strength polymer hot melt adhesive includes the following components in parts by weight: 3 parts rosin, 9 parts petroleum resin, 11 parts terpene resin, 3000.9 parts antioxidant, 8 parts vinyl acetate, 26 parts polymethyl methacrylate, and 36 parts polyethylene. Step 3: The top of the rigid PVC board is thermally passivated and laminated with the tensile-resistant weather-resistant color film to obtain a composite alloy board. The specific operation is as follows: after the tensile-resistant weather-resistant color film is laminated with the top of the rigid PVC board, the heating temperature is controlled at 100-130℃. Then, the composite is performed by pressure bonding with a pressure roller and cooled to room temperature to complete the lamination of the tensile-resistant weather-resistant color film and the rigid PVC board. The tensile-resistant and weather-resistant color film includes the following components in parts by weight: 8 parts acrylonitrile, 13 parts styrene, 6 parts phenylpropionic acid, 16 parts high-temperature resistant adhesive powder, 32 parts PVC, 10101.1 parts antioxidant, 9940.4 parts light stabilizer, and 5 parts UV-resistant and weather-resistant color powder. The thickness of the metal plate in the obtained sheet material is 1.7 mm, the thickness of the adhesive layer formed by the polymer thermal passivation composite adhesive is 0.09 mm, the thickness of the rigid PVC sheet is 1.5 mm, and the thickness of the tensile-resistant and weather-resistant color film is 0.15 mm. Step 4: After being wound up, the composite sheet is unwound by an unwinding machine and enters the wheel rolling and pressing area of ​​the forming machine for preliminary pressing. The principle of wheel rolling is that the pressure roller rotates during the rolling process. Under the action of pressure and the rolling force of the pressure roller, the sheet moves forward automatically, which will cause the sheet to move automatically towards the stamping area and be pressed into a longitudinal S-shaped tile sheet. After preliminary rolling and forming, it is stamped again. When the S-shaped tile sheet enters the stamping and forming area, it is stamped again to form a bamboo-joint tile shape. The pitch of each section can be adjusted arbitrarily. The optimal pitch length is 15-30 cm, because too long or too short will affect the overall appearance of the tile. After the tile is formed, it enters the conveyor belt-type fire-testing area. The fire-testing heats the surface layer, allowing the tensile-resistant and weather-resistant color film to exert its self-repair function, making the surface color more stable. The fire-spraying device adopts a downward spray type. The size of the fire depends on the conveyor speed. The faster the speed, the larger the flame, and vice versa. After the fire-testing operation, the composite alloy tile sheet is obtained.

[0029] The performance of the composite alloy tile prepared in the examples was tested, and the results are as follows: Figures 1 to 6 As shown, the composite alloy roofing sheet prepared by the embodiments of the present invention has excellent load-bearing capacity, combustion performance, hail resistance, impact resistance, bending performance, and chemical stability against corrosion. Therefore, the composite alloy roofing sheet prepared by the present invention has a long service life and a wide range of applications, which can meet the needs of different building fields for roofing materials in terms of safety, durability, and aesthetics. It provides the construction industry with a reliable and economical new composite roofing sheet solution.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile, characterized in that: Includes the following steps: Step 1: Prepare rigid PVC board; Step 2: Apply a high-polymer thermal passivation composite adhesive to the bottom of the rigid PVC board and then thermally passivate it to the metal board. Step 3: The top of the rigid PVC board is thermally passivated and laminated with a tensile-resistant and weather-resistant color film to obtain a composite alloy board; Step 4: According to product requirements, the composite alloy plate is cold-pressed into the specified shape to obtain the composite alloy tile.

2. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 1, characterized in that: The metal plate has a thickness of 1.5-2.0 mm, the adhesive layer formed by the polymer thermal passivation composite adhesive has a thickness of 0.06-0.12 mm, the rigid PVC plate has a thickness of 1.3-1.7 mm, and the tensile-resistant weather-resistant color film has a thickness of 0.1-0.2 mm. The metal plate is any one of aluminum alloy plate, aluminized zinc plate, and galvanized steel plate; The tensile-strength polymer hot melt adhesive comprises the following components in parts by weight: 3 parts rosin, 9 parts petroleum resin, 11 parts terpene resin, 3000.9 parts antioxidant, 8 parts vinyl acetate, 26 parts polymethyl methacrylate, and 36 parts polyethylene. The tensile-resistant and weather-resistant color film comprises the following components in parts by weight: 8 parts acrylonitrile, 13 parts styrene, 6 parts phenylpropionic acid, 16 parts high-temperature resistant adhesive powder, 32 parts PVC, 1.1 parts antioxidant, 0.4 parts light stabilizer, and 5 parts UV-resistant and weather-resistant color powder.

3. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 1, characterized in that: The method for preparing the rigid PVC board includes the following steps: Step 1: Weigh the following according to the formula: carbon black, calcium carbonate mineral powder, silicate mineral powder, recycled PVC material powder, ACR resin, CPE resin, XT-2 rare earth stabilizer, high-temperature resistant solid stearic acid, and solid PE wax. Step 2: The raw materials weighed in Step 1 are conveyed to the mixing pot by the conveying mechanical device and stirred evenly. During the stirring process, the raw materials will generate a heating effect due to mutual friction and friction with the blades. The temperature is controlled at 125℃. Step 3: After the raw materials in Step 2 are mixed evenly, they are placed in the storage device and then sent into the barrel of the twin-screw plastic extruder by the mechanical conveying device for high-temperature plasticization. After plasticization, the mixture is first combined through the confluence core and then extruded into the flat molding die. After entering the die, the molten mixture is extruded into a flat shape by the extrusion pressure of the twin-screw extruder barrel and then extruded. After cooling and solidification, a rigid PVC board is obtained.

4. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 3, characterized in that: The mass fractions of each substance in step 1 are as follows: 1 part carbon black, 17 parts calcium carbonate mineral powder, 17 parts silicate mineral powder, 200 parts recycled PVC material powder, 2 parts ACR resin, 6 parts CPE resin, 5 parts XT-2 type rare earth stabilizer, 1 part high temperature resistant solid stearic acid, and 1 part solid PE wax. The particle size of the calcium carbonate mineral powder is 800-3500 mesh; The particle size of the silicate mineral powder is 800-3500 mesh; The recycled PVC material powder has a particle size of 300-500 mesh and is obtained by recycling and washing PVC products and then crushing them. The PVC material content is more than 90%. If it is less than 90%, PVC material particles need to be added to make the PVC material content more than 90%. The solid PE wax has a melting point higher than 95°C.

5. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 3, characterized in that: In step 3, the twin-screw extruder includes seven heating temperature control zones, which are, in order, the feeding zone, the mixing zone, the conical extrusion zone, the confluence core zone, the confluence core and die connection zone, and the die zone. The temperature control ranges of the seven heating temperature control zones are, in order, 175℃, 180℃, 178℃, 180℃, 185℃, 190℃, and 200℃-210℃.

6. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 1, characterized in that: In step two, a tensile-resistant polymer hot melt adhesive is evenly applied to the surface of the metal plate. Then, a rigid PVC board is placed on the surface of the metal plate and the surface of the metal plate is heated to a temperature of 165-200℃. Subsequently, a pressure bonding operation using a roller is used to bond the rigid PVC board and the metal plate together. The roller is pressed until the temperature drops below 130℃, then the rolling is stopped and the plate is air-cooled to room temperature to complete the bonding of the rigid PVC board and the metal plate.

7. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 1, characterized in that: In step three, after the tensile-resistant weather-resistant color film is bonded to the top of the rigid PVC board, the heating temperature is controlled at 100-130℃. Then, the film is subjected to pressure bonding by a pressure roller and cooled to room temperature to complete the bonding of the tensile-resistant weather-resistant color film and the rigid PVC board.

8. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 1, characterized in that: The product cold pressing operation in step four involves rolling and forming. Specifically, the coiled composite board is unwound by an unwinding machine and enters the wheel rolling and forming area of ​​the forming machine for preliminary forming. The principle of wheel rolling is that the pressure roller rotates during the rolling process. Under the transmission of pressure and rolling force of the pressure roller, the board moves forward automatically and is pressed into a longitudinal S-shaped tile board.

9. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 1, characterized in that: In step four, the product is cold-pressed and rolled into shape, and then stamped for processing. The specific operation is as follows: after initial rolling and forming, it is stamped again. When the S-shaped tile material enters the stamping area, it is stamped again to form a bamboo-joint tile shape. The pitch of each section can be adjusted arbitrarily. The optimal pitch length is 15-30 cm, because too long or too short will affect the overall appearance of the tile.

10. The method for preparing a cold-pressable rigid PVC and metal heat-passivated composite alloy tile sheet according to claim 9, characterized in that: After the tiles are formed, they enter a conveyor belt-type fire zone, where the surface is heated by the fire to enable the tensile-resistant and weather-resistant color film to perform self-repair function, making the surface color more stable.

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