Fireproof veneer and preparation method thereof

Abstract

The invention provides a fireproof veneer and a preparation method thereof, and belongs to the technical field of building decoration materials. The fireproof veneer comprises a glass fiber reinforced layer, a flame-retardant adhesive layer and a flame-retardant organic film layer which are sequentially stacked, wherein the glass fiber reinforced layer is glass fiber cloth made of electronic-grade glass fibers.

Description

Technical Field

[0001] The invention belongs to the technical field of building decoration materials, and particularly relates to a fireproof veneer and a preparation method thereof. Background Art

[0002] With the rapid development of the construction industry, the requirements for the fire resistance of building materials are getting higher and higher, but there is currently no veneer on the market that can achieve Class A fire protection alone; the strength of traditional veneer materials is relatively low, and it is necessary to lay a wire mesh or underlying steel plate under the veneer, which not only increases the construction cost, but also reduces the construction efficiency; the flame retardant function of traditional flame retardant veneers is mainly achieved by adding flame retardants. The flame retardant components are easily precipitated when encountering water vapor, which not only weakens or even loses the flame retardant function of the veneer, but also causes powdering of the veneer and structural corrosion. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a fireproof veneer and a preparation method thereof, in order to at least partially solve the above technical problems. The specific technical solutions provided by the present invention are as follows.

[0004] As a first aspect of the present invention, a fireproof veneer is provided, comprising: a glass fiber reinforcement layer, a flame retardant adhesive layer, and a flame retardant organic film layer stacked in sequence; wherein the glass fiber reinforcement layer is a glass fiber cloth made of electronic grade glass fiber.

[0005] As a second aspect of the present invention, a method for preparing the fireproof veneer as described above is provided, comprising: coating a prepared flame retardant adhesive on an organic polymer film that has been flame retardant treated; covering the flame retardant adhesive with glass fiber cloth and then heating and rolling to obtain a fireproof veneer.

[0006] Based on the above technical solution, a fireproof veneer and a preparation method thereof provided by the present invention have at least one of the following beneficial effects.

[0007] (1) In the embodiment of the present invention, the fireproof veneer provided by the present invention includes a glass fiber reinforcement layer, a flame retardant adhesive layer and a flame retardant organic film layer. The glass fiber cloth made of electronic grade glass fiber has good high temperature resistance. The glass fiber itself has a high melting point and is not easy to burn when a fire occurs. It can effectively block the spread of flames and provide the first line of defense for the fireproof veneer. At the same time, the glass fiber cloth has high strength and rigidity, and can provide good support for the entire fireproof veneer, so that it is not easy to deform during use, thereby improving the structural stability and durability of the fireproof veneer. Whether during the installation process or after long-term use, it can maintain good shape and performance. The flame retardant adhesive layer has flame retardant properties and can prevent or delay the spread of fire when encountering fire, further enhancing the fireproof ability of the fireproof veneer. At the same time, it can firmly bond the glass fiber reinforcement layer and the flame retardant organic film layer together to ensure that the layers will not easily separate in a high temperature environment of a fire, thereby maintaining the overall fireproof performance. As the outermost layer, the flame-retardant organic film layer is in direct contact with the external environment. It can respond quickly at the beginning of a fire. Through its own flame-retardant mechanism, it can suppress the burning of the flame and prevent the heat from being further transferred to the internal material. The layers of materials are stacked in sequence, and a tight overall structure is formed through the bonding of the flame-retardant adhesive layer. This structural design enables the fire-proof veneer to evenly disperse the stress to each layer when it is subjected to external force impact, avoiding damage caused by excessive local force, and further improving the overall structural strength and impact resistance. Electronic-grade glass fiber, flame-retardant adhesive and flame-retardant organic film are all common industrial materials with a wide range of sources and relatively low costs, which are conducive to large-scale production, reducing the production cost of fire-proof veneers and improving their market competitiveness. The structure composed of the glass fiber reinforcement layer, the flame-retardant adhesive layer and the flame-retardant organic film layer is relatively light and thin. While ensuring the fire-proof performance, it will not add too much weight and thickness to the covered object. It is suitable for a variety of different application scenarios, such as architectural decoration, furniture manufacturing, electronic equipment casings and other fields, and can meet the dual requirements of different industries for thin and light materials and fire-proof performance.

[0008] (2) In the embodiment of the present invention, the method for preparing the fireproof veneer provided by the present invention only includes two main steps, namely, coating with flame retardant glue and covering with glass fiber cloth followed by heating and rolling. Compared with some complex multi-layer material preparation processes, this method has a clear operation process, reduces the risk of operational errors caused by cumbersome steps, and has relatively low skill requirements for production personnel, which is convenient for workers to quickly master and implement, and is conducive to improving production efficiency. The equipment used for coating and heating rolling is relatively common in the field of material processing, and no expensive special equipment needs to be customized, which reduces the purchase cost and maintenance difficulty of production equipment, making the preparation method easier to promote and apply in production enterprises of different sizes. Simple process steps and common production equipment shorten the production cycle, enable more products to be produced per unit time, improve production efficiency, and reduce the production cost per unit product. At the same time, due to the relatively simple operation, the product scrap rate caused by operational errors is reduced, further reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the fireproof veneer structure in an embodiment of the present invention.

[0010] Description of reference numerals:

[0011] 11-glass fiber reinforcement layer;

[0012] 12-flame retardant adhesive layer;

[0013] 13-flame retardant organic film layer;

[0014] 14-Aluminum film layer. DETAILED DESCRIPTION

[0015] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0016] In order to solve the problem that the existing fireproof veneer has low strength and the flame retardant is easy to precipitate when it encounters water vapor, resulting in reduced fireproof performance, the present invention provides a fireproof veneer and a preparation method. The fireproof veneer provided by the present invention includes a glass fiber reinforcement layer, a flame retardant adhesive layer, and a flame retardant organic film layer. The high-strength glass fiber cloth is used as the reinforcement layer, which can not only provide higher strength, but also be resistant to corrosion and humid environments, thus avoiding the problem that the current veneer material has poor durability in corrosive and humid environments.

[0017] Figure 1 It is a schematic diagram of the fireproof veneer structure in an embodiment of the present invention.

[0018] Specifically, as a first aspect of the present invention, a fireproof veneer is provided, such as Figure 1As shown, it comprises: a glass fiber reinforcement layer 11, a flame retardant adhesive layer 12, and a flame retardant organic film layer 13 which are stacked in sequence; wherein the glass fiber reinforcement layer 11 is a glass fiber cloth made of electronic grade glass fiber.

[0019] In an embodiment of the present invention, the fireproof veneer provided by the present invention includes a glass fiber reinforcement layer 11, a flame retardant adhesive layer 12 and a flame retardant organic film layer 13. The glass fiber cloth made of electronic grade glass fiber has good high temperature resistance. The glass fiber itself has a high melting point and is not easy to burn when a fire occurs. It can effectively block the spread of flames and provide the first line of defense for the fireproof veneer. At the same time, the glass fiber cloth has high strength and rigidity, and can provide good support for the entire fireproof veneer, so that it is not easy to deform during use, and improves the structural stability and durability of the fireproof veneer. Whether during the installation process or after long-term use, it can maintain a good shape and performance. The flame retardant adhesive layer has flame retardant properties, and can prevent or delay the spread of fire when encountering fire, further enhancing the fireproof ability of the fireproof veneer. At the same time, it can firmly bond the glass fiber reinforcement layer and the flame retardant organic film layer together to ensure that the layers will not be easily separated in a high temperature environment of a fire, and maintain the overall fireproof performance. As the outermost layer, the flame-retardant organic film layer is in direct contact with the external environment. It can respond quickly at the beginning of a fire. Through its own flame-retardant mechanism, it can suppress the burning of the flame and prevent the heat from being further transferred to the internal material. The layers of materials are stacked in sequence, and a tight overall structure is formed through the bonding of the flame-retardant adhesive layer. This structural design enables the fire-proof veneer to evenly disperse the stress to each layer when it is subjected to external force impact, avoiding damage caused by excessive local force, and further improving the overall structural strength and impact resistance. Electronic-grade glass fiber, flame-retardant adhesive and flame-retardant organic film are all common industrial materials with a wide range of sources and relatively low costs, which are conducive to large-scale production, reducing the production cost of fire-proof veneers and improving their market competitiveness. The structure composed of the glass fiber reinforcement layer, the flame-retardant adhesive layer and the flame-retardant organic film layer is relatively light and thin. While ensuring the fire-proof performance, it will not add too much weight and thickness to the covered object. It is suitable for a variety of different application scenarios, such as architectural decoration, furniture manufacturing, electronic equipment casings and other fields, and can meet the dual requirements of different industries for thin and light materials and fire-proof performance.

[0020] According to an embodiment of the present invention, the gram weight of the glass fiber cloth is 50-300g / m 2 . It uses electronic grade glass fiber yarn and adopts high-performance environmentally friendly glass formula, which meets the standards of ASTM D578 and ISO 2078. It has the advantages of both boron-free E glass and E-CR glass. Compared with traditional E glass, it has better mechanical strength, higher softening temperature, better corrosion resistance, better insulation performance, and better temperature shock resistance. This weight range (50-300g / m 2) allows the weight of the glass fiber cloth to be flexibly adjusted according to different application scenarios and performance requirements to optimize the performance of the fireproof veneer. For example, for some occasions with high requirements for flexibility, a glass fiber cloth with a lower weight can be selected; while for environments that need to withstand greater external forces and higher fire protection requirements, a glass fiber cloth with a higher weight can be used. At the same time, it can meet the needs of a variety of industries and fields, so that the fireproof veneer can be applied to different fields such as construction, ships, and automobiles, adapting to various complex use environments and conditions, and expanding the application range of the product.

[0021] According to an embodiment of the present invention, the flame retardant rubber in the flame retardant rubber layer 12 is composed of chloroprene rubber latex, vulcanizing agent, molecular regulator, thickener, tackifying resin, anti-aging agent, flame retardant, and curing agent. The weight proportions of each component in the flame retardant rubber are: 75-92 parts of chloroprene rubber latex, 3-10 parts of vulcanizing agent, an appropriate amount of molecular regulator, 0.07-0.10 parts of thickener, 5-20 parts of tackifying resin, 1-3 parts of anti-aging agent, 10-30 parts of flame retardant, and 5-15 parts of curing agent. The pH of the flame retardant rubber is 6-8. The chloroprene rubber latex is obtained by modifying polychloroprene emulsion with acrylic resin; the vulcanizing agent includes at least one of sulfur, sulfur monochloride, selenium, tellurium, zinc oxide, magnesium oxide and lead oxide; the molecular regulator includes sodium dodecyl sulfonate; the thickener includes at least one of polyacrylamide thickener, sodium chloride, monoethanolamine chloride, diethanolamine chloride, potassium chloride, ammonium chloride, sodium sulfate, sodium phosphate, disodium phosphate and ammonium oxide, which can keep the flame retardant rubber in a uniform and stable suspended state; the tackifying resin includes at least one of rosin-modified tackifying resins, which can effectively improve the bonding strength and toughness of the flame retardant rubber; the anti-aging agent includes at least one of p-phenylenediamine anti-aging agents, which can inhibit or delay the oxidative degradation of the flame retardant rubber and extend the service life; the flame retardant includes hydroxyaluminum; the curing agent includes at least one of water-based chloroprene rubber curing agents.

[0022] In the embodiment of the present invention, the glass fiber reinforcement layer 11 and the flame retardant organic film layer 13 are compounded with flame retardant adhesive, so that the fireproof veneer achieves Class A flame retardant effect (according to GB 8624-2012 "Classification of Combustion Performance of Building Materials and Products"). Aluminum-based flame retardant is added to the flame retardant adhesive, which decomposes and releases a large amount of water vapor to dilute the combustible gas, inhibiting the spread of combustion. At the same time, the high-temperature resistant Al2O3 produced forms a dense protective layer in the fireproof veneer, blocking the air and preventing the flame from spreading further. It can also promote the carbonization of polymers in the flame retardant adhesive, adsorb solid particles, and inhibit the generation of dense smoke. The flame retardant adhesive uses chloroprene latex obtained by modifying polychloroprene emulsion with acrylic resin as the main component, does not contain organic solvents, has low volatile organic compounds, low odor, is green and environmentally friendly, and has excellent substrate adhesion and high temperature resistance.

[0023] According to the embodiment of the present invention, the amount of flame retardant adhesive is 8-40g / m2 On the basis of ensuring good bonding between the glass fiber reinforced layer 11 and the flame retardant organic film layer 13, this dosage range (8-40g / m 2 ) According to the specific production process and product requirements, the amount of flame retardant adhesive can be flexibly adjusted to achieve optimization and balance in bonding performance, fire resistance, cost and other aspects. Under the premise of meeting the basic performance requirements of fireproof veneer, the comprehensive performance and cost performance of the product can be improved by reasonably controlling the amount of flame retardant adhesive. Different production equipment and processes have different requirements for the amount of flame retardant adhesive. This range can adapt to a variety of production conditions, which is convenient for manufacturers to adjust according to their actual conditions and improve production efficiency and product quality stability.

[0024] According to an embodiment of the present invention, the flame retardant organic film layer 13 includes an organic polymer film that has been flame retardantly treated. The organic polymer film includes any one of a polypropylene film, a polyethylene film, and a polyethylene terephthalate film. The thickness of the flame retardant organic film layer is 0.03-0.05 mm, which can ensure that the organic polymer film has a certain flame retardant and isolation effect, and will not affect other properties of the fireproof veneer due to excessive thickness, such as flexibility, air permeability, etc., and can achieve a good balance between fireproof performance and other properties. At the same time, it is conducive to better bonding with other layer materials (such as glass fiber cloth, flame retardant adhesive layer, etc.) to form a stable composite structure. The flame retardant treatment includes adding aluminum hydroxide and MOF to the organic polymer to manufacture a flame retardant organic polymer film. Flame retardant organic polymer film materials produced by other methods can also be used for the production of fireproof veneers in the present invention, and the present invention is not limited to this. Through flame retardant treatment, the flame retardant properties of organic polymer films can be significantly improved, making them less likely to burn when encountering a fire source, or effectively slowing down the burning speed and reducing the possibility of flame propagation, thereby enhancing the fireproof effect of the entire fireproof veneer and providing better fire protection for buildings or equipment. At the same time, it can also reduce the amount of smoke generated by organic polymer films during combustion, reduce the harm of smoke to the human body and pollution to the environment, improve visibility at the fire scene, and facilitate personnel evacuation and fire rescue work.

[0025] According to an embodiment of the present invention, the fireproof veneer further comprises: an aluminum film layer 14, which is located on the side of the flame retardant organic film layer 13 away from the flame retardant adhesive layer 12. The thickness of the aluminum film layer 14 is 1-10 μm. The aluminum film layer 14 is coated on the flame retardant organic film layer 13 to enhance the barrier properties of the fireproof veneer, and can effectively prevent the penetration of gas and water vapor. In addition, the aluminum film also makes the fireproof veneer have a certain mechanical strength and tear resistance, and can be applied to a variety of complex environments. The color of the aluminum film can be selected according to actual conditions, and the surface can be mirror or matte.

[0026] As a second aspect of the present invention, a method for preparing the fireproof veneer as described above is provided, comprising: coating a prepared flame retardant adhesive on an organic polymer film that has been flame retardant treated; covering the flame retardant adhesive with glass fiber cloth and then heating and rolling to obtain a fireproof veneer.

[0027] In an embodiment of the present invention, the preparation method of the fireproof veneer provided by the present invention only includes two main steps, namely, coating with flame retardant glue and covering with glass fiber cloth and then heating and rolling. Compared with some complicated multi-layer material preparation processes, this method has a clear operation process, reduces the risk of operating errors caused by cumbersome steps, and has relatively low skill requirements for production personnel, which is convenient for workers to quickly master and implement, and is conducive to improving production efficiency. The equipment used for coating and heating rolling is relatively common in the field of material processing, and no expensive special equipment needs to be specially customized, which reduces the purchase cost and maintenance difficulty of production equipment, making the preparation method easier to promote and apply in production enterprises of different sizes. Simple process steps and common production equipment shorten the production cycle, can produce more products per unit time, improve production efficiency, and reduce the production cost per unit product. At the same time, due to the relatively simple operation, the product scrap rate caused by operating errors is reduced, and the production cost is further reduced.

[0028] According to an embodiment of the present invention, the flame retardant rubber is prepared by the following method: adding chloroprene rubber latex to a vulcanizing agent and a tackifying resin and mixing them evenly, then sequentially adding a thickener, an anti-aging agent, a flame retardant and a molecular regulator, and adding a curing agent before use. The powder in the raw material needs to be ground into a slurry by adding water on a grinder.

[0029] The present invention is further described below by examples and related test experiments. In the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is obvious that one or more embodiments may also be implemented without these specific details. And, in the absence of conflict, the details in the following embodiments may be combined into other feasible embodiments at will. All instruments, consumables and reagents in the following examples, if not otherwise specified, may be obtained from commercial sources.

[0030] Example 1

[0031] In this embodiment 1, the fireproof veneer is prepared by the following method.

[0032] First, prepare the flame retardant adhesive according to the following method.

[0033] Add 5 parts of zinc oxide, 3 parts of magnesium oxide, 0.08 parts of ammonium oxide, 1.5 parts of p-phenylenediamine, 12 parts of rosin-modified tackifying resin, and 25 parts of hydroxyaluminum to 90 parts of chloroprene rubber latex, stir well to obtain a mixed solution; use sodium dodecyl sulfate to adjust the pH value of the mixed solution to 7.08, stir well to obtain latex. The powder in the raw material needs to be ground into a slurry on a grinder before adding it to the latex mixed solution. Add 10 parts of water-based chloroprene rubber curing agent solution when using it on site. The mixed solution of curing agent and latex is mixed as needed on site and used up on the same day.

[0034] Secondly, the fire-retardant veneer is prepared by using the flame-retardant adhesive prepared above.

[0035] Lay out a 0.03mm thick organic polypropylene (PP) film, which has been coated with an 8μm aluminum layer. Apply flame retardant glue on the PP film, with a dosage of 15g / m 2 , cloth roll machine unrolls high-strength glass fiber cloth, weight 140g / m 2 , align the glass fiber cloth and the organic membrane material for compounding, heat to 75℃ and roll them after they are completely attached, then roll and slit them to obtain the fireproof veneer.

[0036] Example 2

[0037] In this embodiment 2, the fireproof veneer is prepared by the following method.

[0038] First, prepare the flame retardant adhesive according to the following method.

[0039] Add 5 parts of zinc oxide, 3 parts of magnesium oxide, 0.08 parts of ammonium oxide, 1.5 parts of p-phenylenediamine, 12 parts of rosin-modified tackifying resin, and 25 parts of hydroxyaluminum to 90 parts of chloroprene rubber latex, stir well to obtain a mixed solution; use sodium dodecyl sulfate to adjust the pH value of the mixed solution to 6.97, stir well to obtain latex. The powder in the raw material needs to be ground into a slurry on a grinder before adding it to the latex mixed solution. When used on site, add 12 parts of water-based chloroprene rubber curing agent solution. The mixed solution of curing agent and latex is mixed as needed on site and used up on the same day.

[0040] Secondly, the fire-retardant veneer is prepared by using the flame-retardant adhesive prepared above.

[0041] Lay out 0.03mm thick organic PP film, which has been coated with 8μm aluminum layer, and apply flame retardant glue on the PP film, with a dosage of 15g / m 2 , cloth roll machine unrolls high-strength glass fiber cloth, weight 120g / m 2 , align the glass fiber cloth and the organic membrane material for compounding, heat to 75℃ and roll them after they are completely attached, then roll and slit them to obtain the fireproof veneer.

[0042] Example 3

[0043] In this embodiment 3, the fireproof veneer is prepared by the following method.

[0044] First, prepare the flame retardant adhesive according to the following method.

[0045] Add 5 parts of zinc oxide, 3 parts of magnesium oxide, 0.08 parts of ammonium oxide, 1.5 parts of p-phenylenediamine, 12 parts of rosin-modified tackifying resin, and 15 parts of hydroxyaluminum to 90 parts of chloroprene rubber latex, stir well to obtain a mixed solution; use sodium dodecyl sulfate to adjust the pH value of the mixed solution to 7.22, stir well to obtain latex. The powder in the raw material needs to be ground into a slurry on a grinder before adding it to the latex mixed solution. When used on site, add 8 parts of water-based chloroprene rubber curing agent solution. The mixed solution of curing agent and latex is mixed as needed on site and used up on the same day.

[0046] Secondly, the fire-retardant veneer is prepared by using the flame-retardant adhesive prepared above.

[0047] Lay out 0.03mm thick organic PP film material, and apply flame retardant glue on the PP film, with a dosage of 25g / m 2 , cloth roll machine unrolls high-strength glass fiber cloth, weight 110g / m 2 , align the glass fiber cloth and the organic membrane material for compounding, heat to 75℃ and roll them after they are completely attached, then roll and slit them to obtain the fireproof veneer.

[0048] Example 4

[0049] In this embodiment 4, the fireproof veneer is prepared by the following method.

[0050] First, prepare the flame retardant adhesive according to the following method.

[0051] Add 5 parts of zinc oxide, 3 parts of magnesium oxide, 0.08 parts of ammonium oxide, 1.5 parts of p-phenylenediamine, 12 parts of rosin-modified tackifying resin, and 10 parts of hydroxyaluminum to 90 parts of chloroprene rubber latex, stir well to obtain a mixed solution; use sodium dodecyl sulfate to adjust the pH value of the mixed solution to 7.15, stir well to obtain latex. The powder in the raw material needs to be ground into a slurry on a grinder before adding it to the latex mixed solution. Add 10 parts of water-based chloroprene rubber curing agent solution when using it on site. The mixed solution of curing agent and latex is mixed as needed on site and used up on the same day.

[0052] Secondly, the fire-retardant veneer is prepared by using the flame-retardant adhesive prepared above.

[0053] Lay out 0.02mm thick organic PP film material, and apply flame retardant glue on the PP film, with a dosage of 30g / m 2 , cloth roll machine unrolls high-strength glass fiber cloth, weight 120g / m 2 , align the glass fiber cloth and the organic membrane material for compounding, heat to 75℃ and roll them after they are completely attached, then roll and slit them to obtain the fireproof veneer.

[0054] Comparative Example 1

[0055] In this comparative example 1, the fireproof veneer was prepared by the following method.

[0056] First, prepare the flame retardant adhesive according to the following method.

[0057] Add 5 parts of zinc oxide, 3 parts of magnesium oxide, 0.08 parts of ammonium oxide, 1.5 parts of p-phenylenediamine, 12 parts of rosin-modified tackifying resin, and 25 parts of hydroxyaluminum to 90 parts of chloroprene rubber latex, stir well to obtain a mixed solution; use sodium dodecyl sulfate to adjust the pH value of the mixed solution to 7.08, stir well to obtain latex. The powder in the raw material needs to be ground into a slurry on a grinder before adding it to the latex mixed solution. Add 10 parts of water-based chloroprene rubber curing agent solution when using it on site. The curing agent and latex are mixed as needed on site and used up on the same day.

[0058] Secondly, the fire-retardant veneer is prepared by using the flame-retardant adhesive prepared above.

[0059] Lay out 0.02mm thick organic PP film material and apply flame retardant glue on the PP film, with a dosage of 20g / m 2 , cloth roll machine unrolls kraft paper, gram weight 100g / m 2 , align the kraft paper and the organic film material for compounding, heat to 75℃ and roll press after they are completely attached, and then roll and cut to obtain the fireproof veneer.

[0060] Comparative Example 2

[0061] In this comparative example 2, the fireproof veneer was prepared by the following method.

[0062] First, prepare the flame retardant adhesive according to the following method.

[0063] Add 5 parts of zinc oxide, 3 parts of magnesium oxide, 0.08 parts of ammonium oxide, 1.5 parts of p-phenylenediamine, 12 parts of rosin-modified tackifying resin, and 25 parts of hydroxyaluminum to 90 parts of chloroprene rubber latex, stir well to obtain a mixed solution; use sodium dodecyl sulfate to adjust the pH value of the mixed solution to 7.08, stir well to obtain latex. The powder in the raw material needs to be ground into a slurry on a grinder before adding it to the latex mixed solution. Add 10 parts of water-based chloroprene rubber curing agent solution when using it on site. The curing agent and latex are mixed as needed on site and used up on the same day.

[0064] Secondly, the fire-retardant veneer is prepared by using the flame-retardant adhesive prepared above.

[0065] Lay out 0.02mm thick organic PP film material and apply flame retardant glue on the PP film, with a dosage of 20g / m 2 , cloth roll machine unrolls aluminum foil, gram weight 54g / m 2, align the aluminum foil and the organic film material for compounding, heat to 75℃ and roll them after they are completely attached, and then roll and slit them to obtain a fireproof veneer.

[0066] Comparative Example 3

[0067] In this comparative example 3, the fireproof veneer was prepared by the following method.

[0068] Lay out a 0.03mm thick organic PP film, which has been coated with an 8μm aluminum layer. Apply commercially available acrylic glue on the PP film at a dosage of 20g / m 2 , cloth roll machine unrolls high-strength glass fiber cloth, weight 120g / m 2 , align the glass fiber cloth and the organic membrane material for compounding, heat to 75℃ and roll them after they are completely attached, and then roll and slit them to obtain the fireproof veneer.

[0069] Furthermore, the fireproof performance of the fireproof veneers prepared in the above examples and comparative examples was tested. The test results are shown in Table 1.

[0070] Table 1 Test results of fireproof performance of fireproof veneer in examples and comparative examples

[0071]

[0072] As can be seen from Table 1, the bonding curing time of Example 1, Example 4 and all comparative examples is moderate and matches the production speed. Example 2 has the problem of curing too quickly, which will cause material waste, while Example 3 cures slowly. The unit area mass of Examples 1-4 is between 145-177g / m², and the unit area mass in the comparative examples varies greatly. Among them, the unit area mass of Example 1 is the largest, that of Example 3 is relatively small, and the unit area mass of Comparative Example 2 is significantly lower than that of other groups. The different unit area masses are related to the different types, amounts and proportions of materials used in each embodiment. Relatively light fireproof veneers (such as Examples 3 and 4) are more suitable for application scenarios with certain weight restrictions, such as some building interior decorations that require lightweight or fire protection of specific equipment; while the heavier Example 1 has more advantages in situations where higher strength or stability is required.

[0073] The bursting strength of Example 1 is the highest, and that of Examples 2 to 4 decreases in turn; in the comparative examples, the bursting strength of Comparative Example 3 is higher than that of Examples 3 and 4, and Comparative Examples 1 and 2 are much lower than other groups. In the examples, the tensile breaking strength of Example 1 is the highest in the longitudinal direction. In the comparative examples, Comparative Example 3 is higher than that of Examples 3 and 4, and Comparative Examples 1 and 2 are much lower than other groups. The tensile breaking strength of Examples 1 to 4 decreases in the transverse direction in turn; in the comparative examples, Comparative Example 3 is higher than that of Example 4, and Comparative Examples 1 and 2 are much lower than other groups. This shows that the fireproof veneer of Example 1 has better resistance to deformation and damage, and is less likely to break or tear when subjected to external forces, and can provide more reliable protection for the protected object. This difference in mechanical properties is related to the performance of the materials of each layer of the fireproof veneer, the interlayer bonding force, and the overall structural design. For example, the gram weight and quality of the glass fiber cloth, the bonding strength of the flame retardant glue, and the tightness of the fit between the layers will all affect the final mechanical properties. Example 1 achieves a better balance and optimization in these aspects.

[0074] The difference in moisture permeability between each embodiment and comparative example is relatively small. Moisture permeability reflects the water vapor permeability of the material, and this numerical range shows that these fireproof veneers are generally close in water vapor barrier performance. For some application environments that are sensitive to humidity, the moisture permeability will affect the use effect of the fireproof veneer. For example, in a humid environment, too high a moisture permeability will cause water vapor to enter the protected object, affecting its performance; while too low a moisture permeability will form water vapor accumulation inside, which will also have an adverse effect. The relatively low and similar moisture permeability shows that these fireproof veneers have relatively stable barrier properties against water vapor under general conditions. The total heat release of 600s of Examples 1 to 4 increases successively, while the total heat release of Comparative Examples 1 to 3 is significantly higher than that of the embodiments. The total smoke production of the first 600s of Examples 1 to 4 gradually increases, and the total smoke production of the comparative examples is higher than that of the embodiments. The total heat release of the fireproof veneer in the embodiment at 600s is less than that of the comparative example, indicating that the fireproof veneer in the embodiment releases almost no heat in the monomer combustion test, has excellent fireproof and heat-insulating properties, and can effectively prevent heat transfer in a fire. At the same time, the total smoke production of the fireproof veneer in the embodiment at 600s is less than that of the comparative example, indicating that compared with the comparative example, the fireproof veneer in the embodiment produces less smoke during the combustion process, which is conducive to maintaining good visibility when a fire occurs, and provides more favorable conditions for personnel evacuation and fire rescue.

[0075] In general, the embodiments performed better than the comparative examples in multiple indicators of fire resistance, especially in terms of total heat release and total smoke production in the single combustion test; in terms of physical properties such as bursting strength and tensile breaking strength, Example 1 also performed outstandingly.

[0076] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fireproof veneer, comprising: A glass fiber reinforcement layer, a flame retardant adhesive layer, and a flame retardant organic film layer stacked in sequence; Wherein, the glass fiber reinforcement layer is glass fiber cloth made of electronic grade glass fiber.

2. The fireproof veneer according to claim 1, wherein: The flame retardant adhesive in the flame retardant adhesive layer is composed of chloroprene rubber latex, vulcanizing agent, molecular regulator, thickener, tackifying resin, anti-aging agent, flame retardant and curing agent; The flame retardant includes aluminum hydroxy.

3. The fireproof veneer according to claim 2, wherein: The weight proportions of the components in the flame retardant rubber are: 75-92 parts of chloroprene rubber latex, 3-10 parts of vulcanizing agent, 0.05-0.10 parts of thickener, 5-20 parts of tackifying resin, 1-3 parts of anti-aging agent, 10-30 parts of flame retardant, and 5-15 parts of curing agent; The pH of the flame retardant adhesive is adjusted to 6-8 by the molecular regulator.

4. The fireproof veneer according to claim 2, wherein: The chloroprene rubber latex is obtained by modifying polychloroprene latex with acrylic resin; The vulcanizing agent includes at least one of sulfur, sulfur monochloride, selenium, tellurium, zinc oxide, magnesium oxide, and lead oxide; The molecular regulator includes sodium dodecyl sulfate; The thickener includes at least one of polyacrylamide thickener, sodium chloride, monoethanolamine chloride, diethanolamine chloride, potassium chloride, ammonium chloride, sodium sulfate, sodium phosphate, disodium phosphate, and ammonium oxide; The tackifying resin includes at least one of rosin-modified tackifying resins; The anti-aging agent includes at least one of p-phenylenediamine anti-aging agents; The curing agent includes at least one of water-based chloroprene rubber curing agents.

5. The fireproof facing according to claim 1, wherein: The gram weight of the glass fiber cloth is 50-300g / m 2 ; The amount of the flame retardant adhesive is 8-40g / m 2 .

6. The fireproof facing according to claim 1, wherein: The flame retardant organic film layer comprises an organic polymer film that has been subjected to flame retardant treatment; The organic polymer film includes any one of a polypropylene film, a polyethylene film, and a polyethylene terephthalate film; The thickness of the flame retardant organic film layer is 0.03-0.05 mm; The flame retardant treatment includes adding aluminum hydroxide and MOF into organic polymer to prepare a flame retardant organic polymer film.

7. The fireproof facing according to claim 1, further comprising: The aluminum film layer is located on a side of the flame-retardant organic film layer away from the flame-retardant adhesive layer.

8. The fireproof facing according to claim 7, wherein: The thickness of the aluminum film layer is 1-10 μm.

9. A method for preparing a fireproof veneer as claimed in any one of claims 1 to 8, comprising: The prepared flame retardant adhesive is coated on the organic polymer film which has been subjected to flame retardant treatment; The flame retardant adhesive is covered with glass fiber cloth and then heated and rolled to obtain a fireproof veneer.

10. The method according to claim 9, wherein: The flame retardant adhesive is prepared by the following method: After adding chloroprene rubber latex to the vulcanizing agent and tackifying resin and mixing them evenly, thickener, anti-aging agent, flame retardant and molecular regulator are added in sequence, and curing agent is added before use.

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