Inorganic composite insulation board with heat preservation and preparation method thereof

Abstract

The application relates to the technical field of building thermal insulation materials, and particularly discloses an inorganic composite thermal insulation board with a thermal insulation function and a preparation method thereof. The inorganic composite thermal insulation board with the thermal insulation function disclosed by the application comprises, from inside to outside, an inorganic aerogel thermal insulation core material layer, a vacuum protection layer, an inorganic silica gel protection layer and an inorganic fiber anti-cracking surface layer. The inorganic silica gel protection layer comprises the following components in parts by weight: 3-10 parts of a silicon resin, 30-60 parts of a silicate cement, 30-60 parts of an active powder, 5-25 parts of an independent foam core and 60-100 parts of water. The inorganic composite thermal insulation board prepared by the technical scheme has the integrated effects of light weight, hydrophobicity, thermal insulation and fire prevention, the preparation method is simple, the problems of poor thermal insulation performance, heavy weight, easy water absorption and expansion and a complex preparation method of traditional inorganic thermal insulation materials are solved, and the inorganic composite thermal insulation board has a wide application prospect.

Description

Technical Field

[0001] This application relates to the technical field of building insulation materials, specifically to an inorganic composite insulation board with thermal insulation function and its preparation method. Background Technology

[0002] Currently, exterior wall insulation materials are placed on the outer side of the exterior walls, effectively reducing heat exchange between the indoor and outdoor environments and significantly improving the building's insulation performance. This not only reduces winter heating energy consumption but also decreases the frequency of air conditioning use in summer, thereby reducing energy consumption and expenses. Exterior wall insulation materials have become indispensable for green and low-carbon buildings. Traditional exterior wall insulation materials are mainly divided into organic and inorganic insulation material systems.

[0003] Organic insulation materials mainly include polyurethane, polystyrene foam, phenolic foam, and nitrile foam. While these materials offer good insulation performance and heat insulation, they produce toxic fumes and dense smoke when burning in a building fire, severely hindering evacuation and firefighting efforts, and increasing the risk of mass casualties. Inorganic insulation materials are mostly composed of silicate-based materials. They are non-combustible and smokeless in a fire, making them good insulation materials. However, inorganic insulation materials also have drawbacks such as poor heat insulation performance, heavy weight, and susceptibility to moisture absorption and expansion, leading to insulation layer detachment. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides an inorganic composite insulation board with thermal insulation function and its preparation method.

[0005] This application provides an inorganic composite insulation board with thermal insulation function, which consists of an inorganic aerogel thermal insulation core material layer, a vacuum protective layer, an inorganic silica gel protective layer, and an inorganic fiber crack-resistant surface layer from the inside out.

[0006] The inorganic silica gel protective layer comprises the following components in parts by weight: 3-10 parts silica resin, 30-60 parts silicate cement, 30-60 parts active powder, 5-25 parts independent foam core, and 60-100 parts water.

[0007] Preferably, the inorganic silica gel protective layer comprises the following components in parts by weight: 5-8 parts of silica resin, 40-50 parts of silicate cement, 40-50 parts of active powder, 10-20 parts of independent foam core, and 70-90 parts of water.

[0008] The silicone resin is selected from one or more of the following: methyl phenyl silicone resin, methyl silicone resin, low-phenyl methyl silicone resin, silicone resin emulsion, high-temperature silicone resin, epoxy-modified silicone resin, silicone polyester-modified resin, benzyl transparent silicone resin, polymethyl silicone resin, amino silicone resin, fluorosilicone resin, and silicone resin solution.

[0009] The silicate cement is selected from one or more of ordinary silicate cement, composite silicate cement, fly ash silicate cement, and grade slag silicate cement.

[0010] The active powder is selected from one or more of fly ash and mineral powder;

[0011] The independent foam core is selected from one or more of resin foaming agents, aluminum powder foaming agents, and hydrogen peroxide foaming agents.

[0012] Preferably, the thickness of the inorganic silica gel protective layer is 1-10 cm.

[0013] Preferably, the inorganic aerogel thermal insulation core material layer is selected from one or more of silica aerogel, alumina aerogel, polyimide aerogel, fumed silica powder, glass fiber, and composite fiber; the performance parameters of the inorganic aerogel thermal insulation core material are: thermal conductivity of 0.015-0.004 W / (mk) at room temperature (25℃), length 5-150cm, width 5-150cm, and thickness 0.1-60cm.

[0014] Preferably, the inorganic aerogel thermal insulation core material layer and the vacuum protective layer are bonded and sealed with a sealing adhesive to obtain the core material-vacuum protective layer.

[0015] The vacuum protective layer is made of one or more of biaxially oriented nylon film and aluminum foil;

[0016] The sealant is one or more of phenolic resin, epoxy resin, unsaturated polyester, polyurethane, and urea-formaldehyde resin.

[0017] Preferably, the performance parameters of the core material-vacuum protective layer are: vacuum degree 1-1000Pa, thermal conductivity 0.002-0.007 W / (mk).

[0018] Preferably, the inorganic fiber crack-resistant surface layer material is one or more of alkali-free glass fiber mesh and medium-alkali glass fiber mesh; the performance parameters of the inorganic fiber crack-resistant surface layer are: thickness of 2-3 mm, basis weight of 80-165 g / m³. 2 The aperture size is 3-5mm.

[0019] Preferably, the performance parameters of the inorganic composite insulation board are: density 150-500 kg / m³, water-repellent water contact angle 110-140°, thermal conductivity 0.010-0.022 W / (mk), compressive strength 1.0-5.0 MPa / m², and fire rating A1.

[0020] On the other hand, this application provides a method for preparing the above-mentioned inorganic composite insulation board with thermal insulation function, which specifically includes the following steps in sequence:

[0021] Step 1: Cut inorganic aerogel thermal insulation core materials of different lengths, widths and thicknesses according to design requirements, cover them with a vacuum protective layer on a special machine, vacuum them with special vacuum equipment, and seal them with adhesive to form thermal insulation core material-vacuum protective layer.

[0022] Step 2: According to the mixing ratio, add the individual foam cores to water to dissolve them and form individual foam core materials;

[0023] Silicon resin, silicate cement, active powder, and water are placed in a mixing device and stirred to react, forming a three-dimensional network of polymer gel crystals; the independent foam core material is added to the polymer gel crystals, stirred and dispersed to carry out foaming suspension polymerization, forming the inorganic silica gel protective layer;

[0024] Step 3: Cut the inorganic fiber crack-resistant surface layer material into the required size and lay it into the bottom of the special mold. Pour 40-50% of the weight of the inorganic silica gel protective layer material prepared in Step 2 into the special mold and scrape it flat. Spread the core material - vacuum protective layer material prepared in Step 1 on it evenly. Then pour all the remaining inorganic silica gel protective layer material evenly into the special mold, scrape it flat with a scraper, remove the excess inorganic silica gel protective layer material on the surface, and lay the inorganic fiber crack-resistant surface layer on the surface to obtain the inorganic composite insulation board wet board.

[0025] Step 4: The wet inorganic composite insulation board is transported to the steam curing and drying chamber through a transmission device to form the inorganic composite insulation board with heat insulation function.

[0026] like Figure 1 The diagram shown is a schematic diagram of the inorganic composite insulation board with thermal insulation function in Example 1.

[0027] This application starts with the key materials and preparation technology of inorganic composite thermal insulation materials, and invents an inorganic composite thermal insulation board with thermal insulation function and its preparation technology. The prepared inorganic composite thermal insulation board achieves the effect of being lightweight, hydrophobic, thermally insulating and fireproof, providing a good external wall thermal insulation material for green buildings and low-carbon buildings.

[0028] In summary, the technical solution of this application has the following effects:

[0029] This application combines thermal insulation aerogel material and inorganic nano-silica gel material through physical foaming technology, integrating the unique nano properties and thermal insulation and hydrophobic properties of aerogel material with the low thermal conductivity, high strength and lightweight properties of inorganic nano-silica gel material, and provides an inorganic composite insulation board with thermal insulation function.

[0030] This application provides an inorganic composite insulation board with thermal insulation function. Due to the unique three-dimensional nano-network structure of aerogel material, this structure exhibits excellent thermal insulation performance. The thermal insulation principle of aerogel material (e.g.) Figure 2 The main effects (as shown) include the following three aspects: "Infinitely long path" effect: The network skeleton of aerogel infinitely extends the heat conduction path, making heat conduction difficult at the gas-solid interface. "Zero convection" effect: The pore size of aerogel (20-50nm) is smaller than the mean free path of air (70nm), thus preventing free airflow and inhibiting heat convection. "Infinite thermal barrier" effect: The network skeleton of aerogel forms an "infinite thermal barrier effect," shielding against heat radiation and reducing heat transfer. These principles work together to give aerogel an extremely low thermal conductivity (0.012-0.024W / (mk)). After vacuum treatment, the thermal conductivity of the inorganic aerogel insulation core layer is reduced to 0.002-0.007W / (mk), which is 2-3 orders of magnitude lower than traditional insulation materials. Aerogel has excellent thermal insulation performance, allowing for the use of less material with the same insulation effect, and also has a long service life and excellent waterproof performance.

[0031] The inorganic composite insulation board with thermal insulation function provided in this application has improved the overall fire resistance and application safety because each layer is made of fire-resistant material.

[0032] The inorganic composite insulation board with thermal insulation function provided in this application has water-repellent properties in each layer, which improves the waterproof performance of the building's exterior walls and solves the problems of water absorption, expansion, and detachment of traditional insulation materials.

[0033] The inorganic composite insulation board with thermal insulation function provided in this application has a simple preparation method, and the multi-layer composite method is quick and easy, which is conducive to large-scale production. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the inorganic composite insulation board in this application.

[0035] Figure 2 This is a diagram illustrating the thermal insulation mechanism of the inorganic aerogel thermal insulation core material layer in the inorganic composite thermal insulation board of this application. Detailed Implementation

[0036] The present application will be further described in detail below with reference to embodiments, comparative examples and performance test results. These embodiments should not be construed as limiting the scope of protection claimed in this application.

[0037] The specific sources of the raw materials and reagents used in this application are as follows: silica aerogel was purchased from Nano Technology Co., Ltd.; biaxially oriented nylon film was purchased from Wuxi Changmiao New Material Co., Ltd.; silicone resin was purchased from Guangzhou Bailijia Technology Co., Ltd.; active powder was purchased from Guangzhou Xiyi Chemical Co., Ltd.; independent foam core was purchased from Shanghai Bihe Industry and Trade Co., Ltd.; and inorganic fiber crack-resistant surface layer was purchased from Hejian Shilei Fiberglass Cloth Factory. Example Example 1

[0038] Example 1 provides an inorganic composite insulation board with thermal insulation function and its preparation method.

[0039] The method for preparing the inorganic composite insulation board with thermal insulation function in this embodiment is as follows:

[0040] Step 1: Cut the silica aerogel inorganic aerogel thermal insulation core material to a size of 56cm×36cm×2cm. Cover it with a biaxially oriented nylon film vacuum protective layer on a special machine. Vacuum the core material with a special vacuum equipment and seal it with phenolic resin sealant. Vacuum filter the core material to a vacuum pressure of 500Pa to form the filling core material-vacuum protective layer.

[0041] Step 2: Take 15 parts by weight of aluminum powder foaming agent independent foam core material (model 5050), add 50 parts by weight of water to dissolve, put it in a stirrer and stir for 3 minutes to form independent foam core material;

[0042] Take 6 parts by weight of silicone resin (model G566 silicone resin), 45 parts by weight of ordinary silicate cement, 45 parts by weight of mineral active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores into the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0043] Step 3: Cut the inorganic fiber crack-resistant bottom layer material to 60cm×40cm and lay it into the bottom of a 60cm×40cm mold. Pour the inorganic silica gel protective layer material prepared in Step 2 into the mold and smooth it. Spread the core material - vacuum protective layer material prepared in Step 1 evenly on top. Then, pour all the remaining inorganic silica gel protective layer material evenly into the mold and smooth it with a scraper. Remove the excess inorganic silica gel protective layer material from the surface. Lay the cut 60cm×40cm inorganic fiber crack-resistant surface layer on top to prepare an inorganic composite insulation board wet board with thermal insulation function. The thickness of the inorganic aerogel thermal insulation core material is 2cm, the thickness of the vacuum protective layer around the edges is 2mm, the thickness of the inorganic silica gel protective layer around the edges is 0.5cm, and the thickness of the upper and lower layers of the inorganic fiber crack-resistant surface layer is 2mm.

[0044] Step 4: The wet inorganic composite insulation board is transported to the steam curing and drying chamber through a conveying device and dried for 48 hours to form an inorganic composite insulation board with thermal insulation function.

[0045] Examples 2-5

[0046] Examples 2-5 respectively provide an inorganic composite insulation board with thermal insulation function and its preparation method.

[0047] The specific differences between the above embodiments and Embodiment 1 are as follows.

[0048] In Example 2: The thickness of the inorganic silica gel protective layer is 1 cm around its perimeter.

[0049] In Example 3: The thickness of the inorganic aerogel thermal insulation core material is 1 cm.

[0050] In Example 4: Vacuum filtration was performed until the vacuum pressure reached 250 Pa.

[0051] In Example 5: Vacuum filtration was performed until the vacuum pressure was 1000 Pa.

[0052] All other process parameters in the above embodiments are the same as those in Embodiment 1.

[0053] Examples 6-9

[0054] Examples 6-9 respectively provide an inorganic composite insulation board with thermal insulation function and its preparation method.

[0055] The difference between the above embodiments and Embodiment 1 is that the preparation method of the inorganic silica gel protective layer is different, as detailed below.

[0056] In Example 6: The preparation method of the inorganic silica gel protective layer is as follows: Take 5 parts by weight of aluminum powder foaming agent independent foam core material, add 50 parts by weight of water to dissolve, put it in a stirrer and stir for 3 minutes to form independent foam core material;

[0057] Take 10 parts by weight of silicone resin, 30 parts by weight of ordinary silicate cement, 60 parts by weight of active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores into the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0058] In Example 7: The preparation method of the inorganic silica gel protective layer is as follows: 25 parts by weight of aluminum powder foaming agent independent foam core material are added to 50 parts by weight of water to dissolve, and then stirred in a stirrer for 3 minutes to form independent foam core material;

[0059] Take 3 parts by weight of silicone resin, 60 parts by weight of ordinary silicate cement, 30 parts by weight of active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores into the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0060] In Example 8: The preparation method of the inorganic silica gel protective layer is as follows: 10 parts by weight of aluminum powder foaming agent independent foam core material are added to 50 parts by weight of water to dissolve, and then stirred in a stirrer for 3 minutes to form independent foam core material;

[0061] Take 8 parts by weight of silicone resin, 40 parts by weight of ordinary silicate cement, 50 parts by weight of active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores into the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0062] In Example 9: The preparation method of the inorganic silica gel protective layer is as follows: 20 parts by weight of aluminum powder foaming agent independent foam core material are added to 50 parts by weight of water to dissolve, and then stirred in a stirrer for 3 minutes to form independent foam core material;

[0063] Take 5 parts by weight of silicone resin, 50 parts by weight of ordinary silicate cement, 40 parts by weight of active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores into the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0064] All other process parameters in the above embodiments are the same as those in Embodiment 1. Comparative Example

[0065] Comparative Examples 1-3

[0066] Comparative Examples 1-3 each provide an inorganic composite insulation board and its preparation method.

[0067] The differences between the above comparative examples and Example 1 are as follows.

[0068] In Comparative Example 1: The preparation method of the inorganic silica gel protective layer is as follows: Take 30 parts by weight of aluminum powder foaming agent independent foam core material (5050), add 50 parts by weight of water to dissolve, put it in a stirrer and stir for 3 minutes to form independent foam core material;

[0069] Take 2 parts by weight of silicone resin (G566 silicone resin), 65 parts by weight of ordinary silicate cement, 25 parts by weight of mineral active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores to the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0070] In Comparative Example 2: The preparation method of the inorganic silica gel protective layer is as follows: Take 3 parts by weight of aluminum powder foaming agent independent foam core material (5050), add 50 parts by weight of water to dissolve, put it in a stirrer and stir for 3 minutes to form independent foam core material;

[0071] Take 15 parts by weight of silicone resin (G566 silicone resin), 25 parts by weight of ordinary silicate cement, 65 parts by weight of mineral active powder, and 30 parts by weight of water and put them into a mixing device and stir for 3 minutes to form a three-dimensional network of polymer gel crystals; add the prepared independent foam cores to the polymer gel crystals and continue stirring for 2 minutes to prepare an inorganic silica gel protective layer (1 part by weight represents 100g).

[0072] In Comparative Example 3: The preparation method of the inorganic silica gel protective layer is as follows: Take 6 parts by weight of silica resin, 45 parts by weight of ordinary silicate cement, 45 parts by weight of mineral active powder, and 80 parts by weight of water and put them into a mixing device and stir for 3 minutes. Add 15 parts by weight of foaming agent polymer gel crystals and continue stirring for 2 minutes to prepare the inorganic silica gel protective layer (1 part by weight represents 100g).

[0073] All other process parameters in the above comparative examples are the same as those in Example 1.

[0074] Performance testing

[0075] Test room temperature: 25℃.

[0076] Thermal conductivity: determined according to the method specified in GB / T10294.

[0077] Hydrophobic angle: determined according to the method specified in GB / T 42694.

[0078] Compressive strength: determined according to the method specified in GB / T 50107.

[0079] Test results are shown in Table 1.

[0080] Table 1 Performance test results of inorganic composite insulation boards in the examples and comparative examples

[0081]

[0082] Based on Table 1, and by comparing the test results of the embodiments and comparative examples, it can be seen that the inorganic composite insulation board prepared using the technical solution of this application fully utilizes the unique three-dimensional nano-network structure of aerogel materials to achieve thermal insulation performance. It also has the integrated effects of being lightweight, hydrophobic, heat-insulating, and fireproof. The preparation method is simple, solving the problems of poor thermal insulation performance, heavy weight, easy water absorption and expansion, and complex preparation methods of traditional inorganic insulation materials. It has broad application prospects.

[0083] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An inorganic composite insulation board with thermal insulation function, characterized in that, From the inside out, the layers are: inorganic aerogel thermal insulation core material layer, vacuum protective layer, inorganic silica gel protective layer, and inorganic fiber crack-resistant surface layer. The inorganic silica gel protective layer comprises the following components in parts by weight: 3-10 parts silicate resin, 30-60 parts silicate cement, 30-60 parts active powder, 5-25 parts independent foam core, and 60-100 parts water; the independent foam core is aluminum powder foaming agent. The inorganic aerogel thermal insulation core layer is silica aerogel. The inorganic aerogel thermal insulation core material layer and the vacuum protective layer are bonded together with a sealing adhesive to form a core material-vacuum protective layer; the vacuum protective layer is made of one or more of biaxially oriented nylon film and aluminum foil. The preparation method of the inorganic composite insulation board with thermal insulation function specifically includes the following steps in sequence: Step 1: Cut inorganic aerogel thermal insulation core materials of different lengths, widths and thicknesses according to design requirements, cover them with a vacuum protective layer on the machine, vacuum them with vacuum equipment, and seal them with adhesive to form thermal insulation core material-vacuum protective layer. Step 2: According to the mixing ratio, add the individual foam cores to water to dissolve them and form individual foam core materials; Silicon resin, silicate cement, active powder, and water are placed in a mixing device and stirred to react, forming a three-dimensional network of polymer gel crystals; the independent foam core material is added to the polymer gel crystals and stirred to form the inorganic silica gel protective layer; Step 3: Cut the inorganic fiber crack-resistant surface layer material into the required size and lay it at the bottom of the mold. Pour 40-50% of the weight of the inorganic silica gel protective layer material prepared in Step 2 into the mold and smooth it. Spread the core material-vacuum protective layer material prepared in Step 1 evenly on top. Then, pour the remaining inorganic silica gel protective layer material evenly into the mold, smooth it with a scraper, remove the excess inorganic silica gel protective layer material on the surface, and lay the inorganic fiber crack-resistant surface layer on the surface to obtain the inorganic composite insulation board wet board. Step 4: The wet inorganic composite insulation board is transported to the steam curing and drying chamber through a transmission device to form the inorganic composite insulation board with heat insulation function.

2. The inorganic composite insulation board with thermal insulation function according to claim 1, characterized in that, The inorganic silica gel protective layer comprises the following components in parts by weight: 5-8 parts silica resin, 40-50 parts silicate cement, 40-50 parts active powder, 10-20 parts independent foam core, and 70-90 parts water. The active powder is selected from one or more of fly ash and mineral powder.

3. The inorganic composite insulation board with thermal insulation function according to claim 1, characterized in that, The thickness of the inorganic silica gel protective layer is 1-10 cm.

4. The inorganic composite insulation board with thermal insulation function according to claim 1, characterized in that, The performance parameters of the inorganic aerogel thermal insulation core material are as follows: thermal conductivity at room temperature (25℃) is 0.012-0.024 W / (mk); length is 5-150cm, width is 5-150cm, and thickness is 0.1-60cm.

5. The inorganic composite insulation board with thermal insulation function according to claim 1, characterized in that, The sealant is one or more of phenolic resin, epoxy resin, unsaturated polyester, polyurethane, and urea-formaldehyde resin.

6. The inorganic composite insulation board with thermal insulation function according to claim 5, characterized in that, The performance parameters of the core material-vacuum protective layer are: vacuum degree 1-1000Pa, thermal conductivity 0.002-0.007 W / (mk).

7. The inorganic composite insulation board with thermal insulation function according to claim 1, characterized in that, The inorganic fiber crack-resistant surface layer material is one or more of alkali-free glass fiber mesh and medium-alkali glass fiber mesh; the performance parameters of the inorganic fiber crack-resistant surface layer are: thickness 2-3mm, basis weight 80-165g / m³. 2 The aperture size is 3-5mm.

8. The inorganic composite insulation board with thermal insulation function according to any one of claims 1-7, characterized in that, The performance parameters of the inorganic composite insulation board are as follows: density 150-500 kg / m³, water-repellent water contact angle 110-140°, thermal conductivity 0.010-0.022 W / (mk), compressive strength 1.0-5.0 MPa / m², and fire rating A1.

9. The method for preparing the inorganic composite insulation board with thermal insulation function as described in any one of claims 1-8, characterized in that, Specifically, the following steps are performed sequentially: Step 1: Cut inorganic aerogel thermal insulation core materials of different lengths, widths and thicknesses according to design requirements, cover them with a vacuum protective layer on the machine, vacuum them with vacuum equipment, and seal them with adhesive to form thermal insulation core material-vacuum protective layer. Step 2: According to the mixing ratio, add the individual foam cores to water to dissolve them and form individual foam core materials; Silicon resin, silicate cement, active powder, and water are placed in a mixing device and stirred to react, forming a three-dimensional network of polymer gel crystals; the independent foam core material is added to the polymer gel crystals and stirred to form the inorganic silica gel protective layer; Step 3: Cut the inorganic fiber crack-resistant surface layer material into the required size and lay it at the bottom of the mold. Pour 40-50% of the weight of the inorganic silica gel protective layer material prepared in Step 2 into the mold and smooth it. Spread the core material-vacuum protective layer material prepared in Step 1 evenly on top. Then, pour the remaining inorganic silica gel protective layer material evenly into the mold, smooth it with a scraper, remove the excess inorganic silica gel protective layer material on the surface, and lay the inorganic fiber crack-resistant surface layer on the surface to obtain the inorganic composite insulation board wet board. Step 4: The wet inorganic composite insulation board is transported to the steam curing and drying chamber through a transmission device to form the inorganic composite insulation board with heat insulation function.

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