A molding and processing technology for fireproof and moisture-proof boards
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-07
- Publication Date
- 2026-08-14
AI Technical Summary
[0003]传统无机板材，如石膏板，虽具有一定的防火性能，但其耐水性差，遇潮易软化、强度骤降，无法用于潮湿环境；而以水泥、玻镁胶凝材料为基材的板材，虽防火等级高，但普遍存在易返卤泛霜的行业难题，板材内部未充分反应的可溶性盐分在潮湿环境下迁移至表面，形成白斑或潮解液滴，不仅破坏装饰面，更会腐蚀金属龙骨、降低强度，并导致防潮性能彻底失效
本申请采用氧化镁-氯化镁体系提供不燃的基体；木屑作为增强筋，防止开裂；氢氧化铝作为阻燃剂，遇热分解吸热并释放水蒸气，双重阻燃；防潮添加剂在材料内部形成憎水膜，从根源降低吸水率，起到防潮效果；不饱和聚酯树脂固化后形成致密防水膜；纳米二氧化硅填充树脂微孔，大幅提升屏障性；阻燃填料确保表层自身防火；本申请采用分步投料与变速搅拌，确保粉体先均匀混合，再与液料充分浸润，避免结团，获得高均质性的浆料，这是板材性能稳定的基础，调节扩散度，保证浆料既能充分填充模具、包裹纤维，又不会因过稀而分层或过稠而难以密实；使用玻璃纤维布铺层显著提高板材的抗折、抗冲击性能，防止脆性断裂；通过振动密实彻底排除浆料中的气泡，防止板材内部形成空洞缺陷，这些空洞会大幅降低强度并成为水分渗透的通道；通过加压成型，在压力下促进浆料流动密实，提高初始强度，并有助于形成更致密的微观结构，提升防潮性；分段式热固化对于树脂防护层而言，逐步升温固化能让树脂分子链有序交联，形成完整的三维网络结构，能最大化提升防护层的耐磨性、耐化学腐蚀性和附着力，避免因固化过快、不均而产生内应力导致开裂或脱落。本申请通过科学的配方和制备工艺，构建一个稳定、高强、低吸水率的防火基体，每一步工艺都在强化防火或防潮环节，并解决传统板材的固有缺陷，最终实现性能的最优化。
Smart Images
Figure SMS_1
Abstract
Description
Technical Field
[0001] This application relates to the field of decorative panel technology, specifically to a molding and processing technology for a fireproof and moisture-proof panel. Background Technology
[0002] In the field of building decoration and partitions, the performance requirements for boards are increasing, especially in damp places such as kitchens, bathrooms, basements, and ship cabins, or places with strict fire protection requirements. Boards need to have both excellent fire safety and long-term reliable moisture resistance. Currently, the boards commonly available on the market have obvious limitations in taking both of these core properties into account.
[0003] Traditional inorganic boards, such as gypsum board, while possessing certain fire resistance, suffer from poor water resistance, easily softening and experiencing a sharp drop in strength when exposed to moisture, making them unsuitable for humid environments. Boards based on cement or magnesium oxide binders, while boasting high fire resistance, commonly suffer from the industry-wide problem of efflorescence and deliquescence. Unreacted soluble salts within the board migrate to the surface in humid conditions, forming white spots or deliquescent droplets. This not only damages the decorative surface but also corrodes the metal frame, reduces strength, and completely renders the moisture-proof performance ineffective. Therefore, the industry urgently needs a solution that allows for systematic innovation from material systems to molding processes, producing a fire-resistant and moisture-proof integrated board that meets the highest national fire resistance standards while possessing extremely low water absorption and high strength. Summary of the Invention
[0004] To address the aforementioned issues, the purpose of this application is to provide a molding and processing technology for fireproof and moisture-proof boards. The process is simple, and the resulting boards exhibit good fireproof and moisture-proof properties, as well as high strength.
[0005] To achieve the above objectives, this application provides a molding and processing technology for fireproof and moisture-proof boards, comprising the following steps: S1. Dry and sieve the wood chips, dry and sieve the filler, and calcine the magnesium hydroxide to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By weight, mix 60-70 parts magnesium oxide, 5-10 parts pretreated wood chips, 3-8 parts pretreated filler, 8-12 parts pretreated flame retardant, and 2-5 parts moisture-proof additive. Add 8-15 parts magnesium chloride solution and stir at low speed. Add modifier and stir at high speed and add water. Let stand to obtain mature slurry. S3. By weight, mix 90-100 parts of resin, 15-20 parts of nano silica, and 25-30 parts of flame retardant filler, add 1-2 parts of silane coupling agent and stir at a reduced speed, add 1-2 parts of curing agent and 0.5-1 parts of accelerator and stir at a reduced speed again to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry into the mold, lay a second layer of fiberglass cloth, pour the curing slurry again, vibrate to compact, press to form, demold, pre-cur, water curing, staged heat curing, spray protective layer material, and cure to obtain a fireproof and moisture-proof board.
[0006] Furthermore, the wood chips are dried and sieved. The wood chips are dried at 80-100℃ to a moisture content of ≤5%, and the particle size is controlled to be 0.5-2mm during sieving.
[0007] Furthermore, the filler is dried and sieved at 100-105℃ for 2-3 hours and then sieved through a 200-mesh sieve.
[0008] Furthermore, the filler is composed of talc powder, light calcium carbonate, and wollastonite powder, with a mass ratio of talc powder, light calcium carbonate, and wollastonite powder of 1-2:1-2:1-2.
[0009] Furthermore, the calcination is carried out at a temperature of 600-800℃ for 1.5-2 hours.
[0010] Furthermore, the moisture-proof additive is composed of an organosilicon hydrophobic agent and calcium stearate, with the mass ratio of the organosilicon hydrophobic agent to calcium stearate being 2-3:1.
[0011] Furthermore, the mixing and stirring in step S2 is carried out at a speed of 800-1000 rpm for 10-15 minutes.
[0012] Furthermore, in step S2, the low-speed stirring speed is 500-600 rpm, and the time is 5-8 min.
[0013] Furthermore, in step S2, the high-speed stirring speed is 1200-1500 rpm, and the time is 5-8 min.
[0014] Furthermore, the modifier is composed of magnesium sulfate and trisodium phosphate, with a mass ratio of magnesium sulfate to trisodium phosphate of 1-2:1-2.
[0015] Furthermore, the flame-retardant filler is composed of magnesium hydroxide and antimony trioxide, with a mass ratio of magnesium hydroxide to antimony trioxide of 4-5:1.
[0016] Furthermore, in step S3, the mixing and stirring are carried out at a speed of 1100-1200 rpm for 10-15 minutes.
[0017] Furthermore, in step S3, the stirring speed is reduced to 700-800 rpm for 5-6 minutes.
[0018] Furthermore, in step S3, the stirring speed is reduced again to 500-600 rpm for 3-4 minutes.
[0019] Furthermore, the vibration is dense, with a frequency of 25-30Hz, an amplitude of 1-2mm, and a vibration time of 2-3min.
[0020] Furthermore, the pressure molding process involves holding the pressure at 0.5-0.8 MPa for 1-2 minutes at 60-80°C, followed by holding the pressure at 1.0-1.5 MPa for 10-15 minutes.
[0021] Furthermore, the initial curing is carried out by standing for 2-3 hours at 25-30℃ and 60-70% relative humidity.
[0022] Furthermore, the staged thermosetting involves holding the product at 70-80℃ for 2-3 hours, at 110-120℃ for 3-4 hours, and at 150-160℃ for 3-4 hours.
[0023] In summary, this application has the following beneficial effects: This application uses a magnesium oxide-magnesium chloride system to provide a non-combustible matrix; wood chips serve as reinforcing ribs to prevent cracking; aluminum hydroxide acts as a flame retardant, decomposing upon heating to absorb heat and release water vapor, providing dual flame retardancy; moisture-proof additives form a hydrophobic film within the material, reducing water absorption at the source and achieving a moisture-proof effect; unsaturated polyester resin forms a dense waterproof membrane after curing; nano-silica fills the resin micropores, significantly improving barrier properties; flame-retardant fillers ensure the surface layer itself is fireproof; this application employs step-by-step feeding and variable-speed mixing to ensure that the powder is first uniformly mixed and then fully impregnated with the liquid, avoiding clumping and obtaining a highly homogeneous slurry, which is the foundation for stable board performance. Adjusting the diffusion ensures that the slurry can fully fill the mold and wrap the fibers without becoming too thin. Layering or excessive thickness makes it difficult to achieve a dense, compact structure. Using fiberglass cloth layers significantly improves the flexural and impact resistance of the board, preventing brittle fracture. Vibration compaction thoroughly eliminates air bubbles in the slurry, preventing the formation of voids within the board, which significantly reduce strength and become channels for moisture penetration. Pressure molding promotes slurry flow and compaction under pressure, increasing initial strength and contributing to a denser microstructure, thus improving moisture resistance. Segmented thermosetting allows for gradual temperature increase and curing of the resin protective layer, enabling orderly cross-linking of resin molecular chains to form a complete three-dimensional network structure. This maximizes the protective layer's wear resistance, chemical corrosion resistance, and adhesion, preventing cracking or peeling caused by internal stress due to excessively rapid or uneven curing. This application, through scientific formulation and preparation processes, constructs a stable, high-strength, low-water-absorption fireproof matrix. Each process step strengthens fireproofing and moisture resistance, addressing the inherent defects of traditional boards and ultimately achieving optimal performance. Detailed Implementation
[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the embodiments of this application. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this invention.
[0025] The raw materials involved in the specific embodiments of this application are analytical grade. In addition, the light calcium carbonate was purchased from Jinan Shengfeng Industry and Trade Co., Ltd., CAS: 471-34-1; the organosilicon water-repellent agent was purchased from Beijing Zhubao New Technology Co., Ltd., item number: 6635116; the glass fiber cloth is alkali-resistant glass fiber cloth; the nano silica was purchased from Nantong Zhonghe Chemical New Materials Co., Ltd., item number: ZH77109; the resin is an unsaturated resin purchased from Zhengzhou Qiuzhun Trading Co., Ltd., brand number: 191#; the flame retardant filler has an average particle size of 75μm.
[0026] Example 1 A molding and processing technology for fireproof and moisture-proof boards includes the following steps: S1. Dry the wood chips at 80℃ to a moisture content of 5%, sieve to control the particle size to 0.5mm, dry the filler (talc powder, light calcium carbonate, and wollastonite powder mixed in a mass ratio of 1:1:2) at 100℃ for 2 hours, sieve through a 200-mesh sieve, and calcine aluminum hydroxide at 600℃ for 2 hours to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By weight, add 60 parts magnesium oxide, 5 parts pretreated wood chips, 3 parts pretreated filler, 8 parts pretreated flame retardant, and 2 parts moisture-proof additive (organosilicon water-repellent agent and calcium stearate mixed at a mass ratio of 2:1) to a high-speed mixer and mix at 800 rpm for 10 minutes. Then add 8 parts magnesium chloride solution (concentration 52%) and stir at 500 rpm for 5 minutes. Add 0.5 parts modifier (magnesium sulfate and trisodium phosphate mixed at a mass ratio of 1:2), increase the speed to 1200 rpm, stir for 5 minutes, and add water to control the consistency of the slurry at a diffusion degree of 12 mm. Then let it stand at 25°C for 30 minutes to obtain matured slurry. S3. By weight, mix 90 parts resin, 15 parts nano silica, and 25 parts flame retardant filler (magnesium hydroxide and antimony trioxide are mixed at a mass ratio of 4:1) at 1100 rpm for 10 min. Then add 1 part silane coupling agent KH-550 and mix at 700 rpm for 5 min. Add 1-2 parts curing agent and 0.5-1 part accelerator and mix at 500 rpm for 3 min to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry evenly into the mold, lay a second layer of fiberglass cloth, and then pour another layer of curing slurry. Vibrate it on a three-dimensional vibration table to compact it at a frequency of 25Hz, an amplitude of 1mm, and a vibration time of 2min. Press it at 60℃ (hold at 0.5MPa pressure for 1min, then hold at 1.0MPa pressure for 10min). After demolding, let it stand for 2h at 25℃ and 60% relative humidity, then immerse it in 20℃ clean water for 24h, then dry it in a 40℃ oven for 48h, and then perform heat curing (constant temperature at 70℃ for 2h, 110℃ for 4h, and 150℃ for 3h). Then spray a protective layer material on the surface with a thickness of 0.2mm, and then cure it at 25℃ for 48h to obtain a fireproof and moisture-proof board.
[0027] Example 2 A molding and processing technology for fireproof and moisture-proof boards includes the following steps: S1. Dry the wood chips at 90℃ to a moisture content of 5%, sieve to control the particle size to 1mm, dry the filler (talc powder, light calcium carbonate, and wollastonite powder mixed in a mass ratio of 1:1:1) at 103℃ for 2 hours, sieve through a 200-mesh sieve, and calcine aluminum hydroxide at 700℃ for 2 hours to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By mass, add 65 parts magnesium oxide, 8 parts pretreated wood chips, 5 parts pretreated filler, 10 parts pretreated flame retardant, and 3 parts moisture-proof additive (organosilicon water-repellent agent and calcium stearate mixed in a mass ratio of 2:1) to a high-speed mixer and mix at 900 rpm for 12 minutes. Then add 12 parts magnesium chloride solution (concentration 52%) and stir at 550 rpm for 6 minutes. Add 1 part modifier (magnesium sulfate and trisodium phosphate mixed in a mass ratio of 1:1), increase the speed to 1300 rpm, stir for 6 minutes, and add water to control the consistency of the slurry at a diffusion degree of 13 mm. Then let it stand at 25°C for 35 minutes to obtain matured slurry. S3. By weight, 95 parts of resin, 18 parts of nano silica, and 28 parts of flame retardant filler (magnesium hydroxide and antimony trioxide are mixed at a mass ratio of 5:1) are mixed at 1150 rpm for 10 min. Then, 2 parts of silane coupling agent KH-550 are added and mixed at 750 rpm for 5 min. Finally, 2 parts of curing agent and 1 part of accelerator are added and mixed at 550 rpm for 3 min to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry evenly into the mold, lay a second layer of fiberglass cloth, and then pour another layer of curing slurry. Vibrate it on a three-dimensional vibration table to compact it at a frequency of 28Hz, an amplitude of 2mm, and a vibration time of 3min. Press it at 70℃ (hold at 0.6MPa pressure for 2min, then hold at 1.2MPa pressure for 15min). After demolding, let it stand for 3h at 28℃ and 65% relative humidity, then immerse it in 25℃ clean water for 36h, then dry it in a 45℃ drying oven for 60h, and then perform heat curing (hold at 80℃ for 2h, 120℃ for 4h, and 160℃ for 3h). Then spray a protective layer material on the surface with a thickness of 0.25mm, and then cure it at 28℃ for 48h to obtain a fireproof and moisture-proof board.
[0028] Example 3 A molding and processing technology for fireproof and moisture-proof boards includes the following steps: S1. Dry the wood chips at 100℃ to a moisture content of 5%, sieve to control the particle size to 2mm, dry the filler (talc powder, light calcium carbonate, and wollastonite powder mixed in a mass ratio of 2:1:1) at 105℃ for 3 hours, sieve through a 200-mesh sieve, and calcine aluminum hydroxide at 800℃ for 2 hours to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By weight, add 70 parts magnesium oxide, 10 parts pretreated wood chips, 8 parts pretreated filler, 12 parts pretreated flame retardant, and 5 parts moisture-proof additive (organosilicon water-repellent agent and calcium stearate mixed in a mass ratio of 3:1) to a high-speed mixer and mix at 1000 rpm for 15 minutes. Then add 15 parts magnesium chloride solution (concentration 52%) and stir at 600 rpm for 8 minutes. Add 1.5 parts modifier (magnesium sulfate and trisodium phosphate mixed in a mass ratio of 2:1), increase the speed to 1500 rpm, stir for 8 minutes, and add water to control the consistency of the slurry at a diffusion of 15 mm. Then let it stand at 30°C for 45 minutes to obtain matured slurry. S3. By weight, 100 parts of resin, 20 parts of nano silica, and 30 parts of flame retardant filler (magnesium hydroxide and antimony trioxide are mixed at a mass ratio of 5:1) are mixed at 1200 rpm for 10 min. Then, 2 parts of silane coupling agent KH-550 are added and mixed at 800 rpm for 5 min. Finally, 2 parts of curing agent and 1 part of accelerator are added and mixed at 600 rpm for 3 min to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry evenly into the mold, lay a second layer of fiberglass cloth, and then pour another layer of curing slurry. Vibrate it on a three-dimensional vibration table to compact it at a frequency of 30Hz, an amplitude of 2mm, and a vibration time of 3min. Press it at 80℃ (hold at 0.8MPa pressure for 2min, then hold at 1.5MPa pressure for 15min). After demolding, let it stand for 3h at 30℃ and 70% relative humidity, then immerse it in 25℃ clean water for 48h, then dry it in a 50℃ drying oven for 72h, and then perform heat curing (hold at 80℃ for 2h, 120℃ for 4h, and 160℃ for 3h). Then spray a protective layer material on the surface with a thickness of 0.3mm, and then cure it at 30℃ for 48h to obtain a fireproof and moisture-proof board.
[0029] Compare with Example 1 The difference between this comparative example and Example 3 is that the molding and processing technology of a fireproof and moisture-proof board in this comparative example includes the following steps: S1. Dry the wood chips at 100℃ to a moisture content of 5%, sieve to control the particle size to 2mm, dry the filler (talc powder, light calcium carbonate, and wollastonite powder mixed in a mass ratio of 2:1:1) at 105℃ for 3 hours, sieve through a 200-mesh sieve, and calcine aluminum hydroxide at 800℃ for 2 hours to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By weight, add 70 parts magnesium oxide, 10 parts pretreated wood chips, 8 parts pretreated filler, 12 parts pretreated flame retardant, and 5 parts moisture-proof additive (organosilicon water-repellent agent and calcium stearate mixed in a mass ratio of 3:1) to a high-speed mixer and mix at 1000 rpm for 15 minutes. Then add 15 parts magnesium chloride solution (concentration 52%) and stir at 600 rpm for 8 minutes. Add 1.5 parts modifier (magnesium sulfate and trisodium phosphate mixed in a mass ratio of 2:1), increase the speed to 1500 rpm, stir for 8 minutes, and add water to control the consistency of the slurry at a diffusion of 15 mm. Then let it stand at 30°C for 45 minutes to obtain matured slurry. S3. By weight, 100 parts of resin, 20 parts of nano silica, and 30 parts of flame retardant filler (magnesium hydroxide and antimony trioxide are mixed at a mass ratio of 5:1) are mixed at 1200 rpm for 10 min. Then, 2 parts of silane coupling agent KH-550 are added and mixed at 800 rpm for 5 min. Finally, 2 parts of curing agent and 1 part of accelerator are added and mixed at 600 rpm for 3 min to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry evenly into the mold, lay a second layer of fiberglass cloth, and then pour another layer of curing slurry. Vibrate it on a three-dimensional vibration table to compact it at a frequency of 30Hz, an amplitude of 2mm, and a vibration time of 3min. Press it at 80℃ (hold pressure at 0.8MPa for 2min, then hold pressure at 1.5MPa for 15min). After demolding, let it stand for 3h at 30℃ and 70% relative humidity, then immerse it in 25℃ clean water for 48h, then dry it in a 50℃ oven for 72h, and then perform heat curing (constant temperature at 160℃ for 9h). Then spray a protective layer material on the surface with a thickness of 0.3mm, and then cure it at 30℃ for 48h to obtain a fireproof and moisture-proof board.
[0030] Compare with Example 2 The difference between this comparative example and Example 3 is that the molding and processing technology of a fireproof and moisture-proof board in this comparative example includes the following steps: S1. Dry the wood chips at 100℃ to a moisture content of 5%, sieve to control the particle size to 2mm, dry the filler (talc powder, light calcium carbonate, and wollastonite powder mixed in a mass ratio of 2:1:1) at 105℃ for 3 hours, sieve through a 200-mesh sieve, and calcine aluminum hydroxide at 800℃ for 2 hours to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By mass, add 70 parts magnesium oxide, 10 parts pretreated wood chips, 8 parts pretreated filler, 12 parts pretreated flame retardant, 5 parts moisture-proof additive (organosilicon water-repellent agent and calcium stearate mixed at a mass ratio of 3:1), 15 parts magnesium chloride solution (concentration 52%), and 1.5 parts modifier (magnesium sulfate and trisodium phosphate mixed at a mass ratio of 2:1) to a high-speed mixer, then stir at 1500 rpm for 31 minutes, add water to control the consistency of the slurry at a diffusion degree of 15 mm, and then let it stand at 30℃ for 45 minutes to obtain matured slurry. S3. By weight, 100 parts of resin, 20 parts of nano silica, and 30 parts of flame retardant filler (magnesium hydroxide and antimony trioxide are mixed at a mass ratio of 5:1) are mixed at 1200 rpm for 10 min. Then, 2 parts of silane coupling agent KH-550 are added and mixed at 800 rpm for 5 min. Finally, 2 parts of curing agent and 1 part of accelerator are added and mixed at 600 rpm for 3 min to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry evenly into the mold, lay a second layer of fiberglass cloth, and then pour another layer of curing slurry. Vibrate it on a three-dimensional vibration table to compact it at a frequency of 30Hz, an amplitude of 2mm, and a vibration time of 3min. Press it at 80℃ (hold at 0.8MPa pressure for 2min, then hold at 1.5MPa pressure for 15min). After demolding, let it stand for 3h at 30℃ and 70% relative humidity, then immerse it in 25℃ clean water for 48h, then dry it in a 50℃ drying oven for 72h, and then perform heat curing (hold at 80℃ for 2h, 120℃ for 4h, and 160℃ for 3h). Then spray a protective layer material on the surface with a thickness of 0.3mm, and then cure it at 30℃ for 48h to obtain a fireproof and moisture-proof board.
[0031] Performance testing Functional tests were conducted on a fireproof and moisture-proof board prepared in Examples 1-3 and Comparative Examples 1-2.
[0032] Fire resistance performance: The fire resistance rating is tested according to standard GB 8624-2012; Moisture-proof performance: Three pieces of fireproof and moisture-proof board prepared in Examples 1-3 and Comparative Examples 1-2 were dried to constant weight (m1) in an oven at 60℃, immersed in distilled water at 20℃, removed after 24 hours, wiped off surface water droplets with a damp cloth, and weighed immediately (m2). The water absorption rate was calculated and the average value was taken; Water absorption rate = (m2-m1) / m1×100% Compressive strength: Three fireproof and moisture-proof boards prepared in Examples 1-3 and Comparative Examples 1-2 were dried in an oven at 60°C to constant weight (size 250mm×250mm×12mm). They were then subjected to uniform loading at a loading rate of 1.0kN / s on a universal testing machine until the specimens failed. The compressive strength was calculated and the average value was taken. Flexural strength: Three fireproof and moisture-proof boards prepared in Examples 1-3 and Control Examples 1-2 were dried to constant weight in a 60℃ oven (dimensions 250mm×250mm×12mm). A three-point bending method was used, with the support span being 10 times the thickness of the specimen. The specimen was loaded uniformly at a rate of 5mm / min until failure. The flexural strength was calculated, and the average value was taken. The test results are shown in Table 1. Table 1
[0033] As shown in Table 1, the fireproof and moisture-proof board prepared by the processing and molding process of this application has excellent fireproof and moisture-proof effects and excellent mechanical properties. The fireproof rating reaches A1 level, indicating a high fireproof rating. The very low water absorption rate indicates good moisture-proof effect. The high compressive strength and flexural strength indicate strong mechanical properties. Compared with Example 3, Comparative Example 1 was directly heat-cured at 160℃ for 9 hours. The test results showed that the fireproof and moisture-proof effect and mechanical properties were not as good as those of Example 3. The difference between Comparative Example 2 and Example 3 is that differential speed mixing was not performed. The mixture was directly stirred at 1500 rpm for 31 minutes. The test results showed that the fireproof performance was A2 level, the water absorption rate was relatively high, and the mechanical properties were poor, indicating that Comparative Example 2 was not as good as Example 3.
[0034] The above description is merely an example and illustration of the concept of this application. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the inventive concept or exceed the scope defined in the claims, they should all fall within the protection scope of this application.
Claims
1. A molding and processing technology for fireproof and moisture-proof boards, characterized in that, Includes the following steps: S1. Dry and sieve the wood chips, dry and sieve the filler, and calcine the magnesium hydroxide to obtain pretreated wood chips, pretreated filler, and pretreated flame retardant. S2. By weight, mix 60-70 parts magnesium oxide, 5-10 parts pretreated wood chips, 3-8 parts pretreated filler, 8-12 parts pretreated flame retardant, and 2-5 parts moisture-proof additive. Add 8-15 parts magnesium chloride solution and stir at low speed. Add modifier and stir at high speed and add water. Let stand to obtain mature slurry. S3. By weight, mix 90-100 parts of resin, 15-20 parts of nano silica, and 25-30 parts of flame retardant filler, add 1-2 parts of silane coupling agent and stir at a reduced speed, add 1-2 parts of curing agent and 0.5-1 parts of accelerator and stir at a reduced speed again to obtain the protective layer material. S4. Lay a layer of fiberglass cloth at the bottom of the mold, pour the curing slurry into the mold, lay a second layer of fiberglass cloth, pour the curing slurry again, vibrate to compact, press to form, demold, pre-cur, water curing, staged heat curing, spray protective layer material, and cure to obtain a fireproof and moisture-proof board.
2. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The mixing and stirring in step S2 is performed at a speed of 800-1000 rpm for 10-15 minutes.
3. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The low-speed stirring speed in step S2 is 500-600 rpm, and the time is 5-8 min.
4. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The high-speed stirring speed in step S2 is 1200-1500 rpm, and the time is 5-8 min.
5. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The modifier is composed of magnesium sulfate and trisodium phosphate, with a mass ratio of magnesium sulfate to trisodium phosphate of 1-2:1-2.
6. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The flame-retardant filler is composed of magnesium hydroxide and antimony trioxide, with a mass ratio of magnesium hydroxide to antimony trioxide of 4-5:
1.
7. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The vibration is dense, with a frequency of 25-30Hz, an amplitude of 1-2mm, and a vibration time of 2-3min.
8. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The pressure molding process involves holding the pressure at 0.5-0.8 MPa for 1-2 minutes at 60-80°C, followed by holding the pressure at 1.0-1.5 MPa for 10-15 minutes.
9. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, The initial curing process involves standing for 2-3 hours at 25-30℃ and 60-70% relative humidity.
10. The molding and processing technology of a fireproof and moisture-proof board according to claim 1, characterized in that, Furthermore, the staged thermosetting involves holding the product at 70-80℃ for 2-3 hours, at 110-120℃ for 3-4 hours, and at 150-160℃ for 3-4 hours.