Preparation method of wood stone material

Abstract

The invention provides a preparation method of a wood-stone material, and relates to the technical field of wood-stone materials, the preparation method comprises the following steps: weighing stone powder, wood powder, polyvinyl chloride, a flame retardant, calcium powder, a foaming agent, a foaming regulator, a stabilizer, an anti-impact agent, stearic acid and oxidized polyethlene wax in parts by weight; uniformly mixing the stone powder, the wood powder, the polyvinyl chloride and the calcium powder, adding the foaming agent and the foaming regulator, and mixing; and finally, putting the mixture into an extruder, adding the flame retardant, the stabilizer, the anti-impact agent, the stearic acid and the oxidized polyethylene after the mixture is melted and blended uniformly, blending uniformly, and carrying out extrusion molding on the blended material. According to the invention, the shell layer and the core layer of the flame retardant respectively select different flame-retardant / fire-extinguishing components, so that not only can an excellent fireproof and flame-retardant effect be achieved in daily use, but also different degrees of flame-retardant and fire-extinguishing effects can be achieved in different stages of a fire disaster, and when the flame retardant is applied to the wood-stone material, the fireproof and flame-retardant performance of the wood-stone material can be effectively improved.

Description

[0001] This application is a divisional application of an invention application with an application date of June 6, 2024, a Chinese application number of 202410727210.4, and an invention title of "Fireproof and Flame-retardant Wood-Stone Material and Its Preparation Method". Technical Field

[0002] The present invention relates to the technical field of wood-stone materials, and specifically relates to a preparation method of wood-stone materials. Background Art

[0003] Wood-stone materials are composite materials made mainly of stone powder (the main component is usually calcium carbonate) and wood fiber / wood powder, supplemented by polymer materials such as polyvinyl chloride and processing aids. The proportion of stone powder in the raw material system is the highest, and the prepared wood-stone materials have the advantages of natural environmental protection, no formaldehyde addition, good moisture resistance, and strong impact resistance.

[0004] Due to the above excellent properties of wood-stone materials, they can be applied to the production of door panels or door frames. When wood-stone materials are used in the home furnishing field, such as as raw materials for door panels or door frames, they have relatively high requirements for their fireproof and flame-retardant properties, so that in daily use, the possibility of fire can be reduced, and when an unfortunate fire accident occurs, they can maximize fire prevention and flame retardancy and even play a certain fire extinguishing role.

[0005] The prior art usually directly adds flame retardant aids to the wood-stone material system to improve its fireproof and flame-retardant properties. Inorganic aids such as magnesium hydroxide or aluminum hydroxide are usually selected as the flame retardant aids. However, in the actual production and use process, the addition of the above aids has limited effect on improving the flame retardancy of wood-stone materials. Therefore, a wood-stone material with better fireproof and flame-retardant properties is needed to improve its daily fire safety performance when applied to home furnishing fields such as door panels or door frames, as well as its flame retardant / extinguishing performance in case of a fire accident. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the present invention provides a preparation method of wood-stone materials, which solves the technical problems that the existing wood-stone materials have poor fireproof and flame-retardant properties in daily use and poor flame retardant and extinguishing properties in case of a fire accident.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the present invention is realized through the following technical solutions:

[0010] A wood-stone material, comprising the following components in parts by weight: 100-120 parts of stone powder, 50-80 parts of wood powder, 30-50 parts of polyvinyl chloride, 15-25 parts of flame retardant, 10-20 parts of calcium powder, 2-2.5 parts of foaming agent, 10-15 parts of foaming regulator, 5-7 parts of stabilizer, 2-5 parts of impact modifier, 0.6-1.5 parts of stearic acid, and 0.4-0.6 parts of oxidized polyethylene wax; the flame retardant comprises a shell layer and a core layer, the main component of the shell layer is an organic flame retardant and a degradable resin, and the main component of the core layer is an aerosol fire extinguishing agent.

[0011] Preferably, the mass ratio of the shell layer to the core layer is (1-1.5):1.

[0012] Preferably, the mass of the organic flame retardant is 20-30% of the mass of the degradable resin.

[0013] Preferably, the main component of the core layer further comprises a carbon fiber reinforcement, the aerosol fire extinguishing agent is dispersed in the skeleton of the carbon fiber reinforcement, and the mass ratio of the aerosol fire extinguishing agent to the carbon fiber reinforcement is 1:(2-2.4).

[0014] Preferably, the organic flame retardant is a phosphorus-based flame retardant or a nitrogen-based flame retardant; the degradable resin is one or a mixture of polylactic acid, polyacrylic acid, or polybutylene adipate terephthalate.

[0015] Preferably, the foaming agent comprises: 50-65% of sodium dodecyl sulfate, 20-35% of sodium fatty alcohol polyoxyethylene ether sulfate, and 10-20% of polyoxyethylene fatty acid ester.

[0016] Preferably, the foaming regulator is any one of ZB-530, K-400, or JINHASS foaming regulator.

[0017] Preferably, the stabilizer is an organotin stabilizer or a calcium-zinc stabilizer.

[0018] Preferably, the impact modifier is chlorinated polyethylene or an acrylate copolymer.

[0019] A preparation method of a wood-stone material, specifically comprising the following steps:

[0020] S1. Raw material preparation: Weigh 100-120 parts of stone powder, 50-80 parts of wood powder, 30-50 parts of polyvinyl chloride, 15-25 parts of flame retardant, 10-20 parts of calcium powder, 2-2.5 parts of foaming agent, 10-15 parts of foaming regulator, 5-7 parts of stabilizer, 2-5 parts of impact modifier, 0.6-1.5 parts of stearic acid, and 0.4-0.6 parts of oxidized polyethylene wax according to parts by weight;

[0021] S2. Mixing and batching: First, mix the stone powder, wood powder, polyvinyl chloride, and calcium powder evenly, and then add the foaming agent and foaming regulator and mix again;

[0022] S3. Extrusion: Put the mixed material into the extruder. After the mixed material melts and is blended evenly, add the flame retardant, stabilizer, impact modifier, stearic acid, and polyethylene oxide, and blend them evenly. Then extrude and form the blended material;

[0023] S4. Forming and cooling: Cool and vacuum shape the extruded mixture through a mold;

[0024] S5. Cutting and trimming: Cut and trim the formed product according to the production requirements;

[0025] S6. Inspection: Conduct quality inspection on the product, check its size, appearance, and performance. After passing the inspection, produce and store it in the warehouse.

[0026] (III) Beneficial effects

[0027] The present invention provides a preparation method of a wood-stone material. Compared with the prior art, it has the following beneficial effects:

[0028] 1. The flame retardant used in the present invention has a core-shell structure, and different flame retardant / extinguishing components are selected for the shell layer and the core layer respectively. It can not only play an excellent fireproof and flame retardant role during daily use, but also play different degrees of flame retardant and extinguishing roles at different stages of a fire. The specific principle of flame retardant and extinguishing is as follows: Due to the addition of the flame retardant of the present invention, the ignition point of the wood-stone material is greatly increased, and the organic flame retardant in the shell layer can play an excellent flame retardant effect. Therefore, there is a significant improvement in the daily fireproof performance; when a fire just starts, first, the organic flame retardant in the shell layer plays a flame retardant role. At this stage, the fire may be stopped, or the fire may be delayed by the flame retardant effect of the organic flame retardant, buying more rescue time for the trapped people; when the fire continues and the surrounding temperature rises rapidly, the degradable resin begins to decompose, the core layer aerosol fire extinguishing agent material is exposed, and after absorbing heat, it undergoes a combustion reaction to release effective flame retardant substances and takes effect, further flame retarding or even extinguishing the fire. Therefore, applying this flame retardant to the wood-stone material can effectively improve the fireproof and flame retardant performance of the wood-stone material.

[0029] 2. The main components of the core-shell structure of the flame retardant of the present invention are selected as organic flame retardants and degradable resins. On the one hand, the compatibility between organic substances is better, which can improve the stability of the flame retardant itself. On the other hand, compared with conventional inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide, the flame retardant of the present invention has better dispersibility in the wood-stone material, which can make the performance of the prepared wood-stone material more stable and extend the fireproof and flame retardant time. Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] By providing a fireproof and flame-retardant wood-stone material and a preparation method thereof in the embodiments of the present application, the problems that the existing wood-stone materials have poor fireproof and flame-retardant properties during daily use and poor flame-retardant and fire-extinguishing properties in case of a fire accident are solved, and the prepared wood-stone material has excellent fireproof and flame-retardant properties.

[0032] To better understand the above technical solutions, the following will describe the above technical solutions in detail in combination with specific implementation manners.

[0033] All raw materials of the present invention are purchased from cooperative manufacturers.

[0034] Example 1:

[0035] The fireproof and flame-retardant wood-stone material comprises the following components in parts by weight: 100 parts of stone powder, 50 parts of wood powder, 30 parts of polyvinyl chloride, 15 parts of flame retardant, 10 parts of calcium powder, 2 parts of foaming agent, 10 parts of ZB-530 foaming regulator, 5 parts of organotin stabilizer, 2 parts of chlorinated polyethylene, 0.6 part of stearic acid, and 0.4 part of oxidized polyethylene wax;

[0036] The flame retardant comprises a shell layer and a core layer with a mass ratio of 1:1;

[0037] The main components of the shell layer are a phosphorus-based flame retardant and polylactic acid, and the mass of the phosphorus-based flame retardant is 20% of the mass of polylactic acid;

[0038] The main components of the core layer are an aerosol fire extinguishing agent and a carbon fiber reinforcing body with a mass ratio of 1:2, and the aerosol fire extinguishing agent is dispersed in the framework of the carbon fiber reinforcing body.

[0039] The foaming agent comprises: 50% of sodium dodecyl sulfate, 35% of fatty alcohol polyoxyethylene ether sulfate, and 15% of polyoxyethylene fatty acid ester.

[0040] The preparation method of the fireproof and flame-retardant wood-stone material specifically comprises the following steps:

[0041] S1. Raw material preparation: Weigh the above raw materials according to the parts by weight;

[0042] S2. Mixing and batching: First, uniformly mix the stone powder, wood powder, polyvinyl chloride, and calcium powder, and then add the foaming agent and the ZB-530 foaming regulator and mix again;

[0043] S3. Extrusion: Put the mixture into an extruder. After the mixture melts and is uniformly blended, add a flame retardant, an organotin stabilizer, chlorinated polyethylene, stearic acid, and polyethylene oxide wax, and blend them uniformly. Then extrude and shape the blended material.

[0044] S4. Shaping and Cooling: Cool and vacuum shape the extruded mixture through a mold.

[0045] S5. Cutting and Trimming: Cut and trim the shaped product according to production requirements.

[0046] S6. Inspection: Conduct quality inspection on the product, check its dimensions, appearance, and performance. After passing the inspection, produce and store it in the warehouse.

[0047] Example 2:

[0048] A fireproof and flame-retardant wood-stone material, comprising the following components in parts by weight: 110 parts of stone powder, 65 parts of wood powder, 40 parts of polyvinyl chloride, 20 parts of flame retardant, 15 parts of calcium powder, 2.25 parts of foaming agent, 12.5 parts of K-400 foaming regulator, 6 parts of calcium-zinc stabilizer, 3.5 parts of chlorinated polyethylene, 1.1 parts of stearic acid, and 0.5 part of polyethylene oxide wax;

[0049] The flame retardant includes a shell layer and a core layer with a mass ratio of 1.25:1;

[0050] The main components of the shell layer are a nitrogen-based flame retardant and polyacrylic acid, and the mass of the nitrogen-based flame retardant is 25% of the mass of polyacrylic acid;

[0051] The main components of the core layer are an aerosol fire extinguishing agent and a carbon fiber reinforcement with a mass ratio of 1:2.2, and the aerosol fire extinguishing agent is dispersed in the framework of the carbon fiber reinforcement.

[0052] The foaming agent includes: 58% of sodium dodecyl sulfate, 26% of sodium fatty alcohol polyoxyethylene ether sulfate, and 16% of polyethylene fatty acid ester.

[0053] A preparation method of the fireproof and flame-retardant wood-stone material specifically includes the following steps:

[0054] S1. Raw Material Preparation: Weigh the above raw materials according to parts by weight;

[0055] S2. Mixing and Batching: First, uniformly mix the stone powder, wood powder, polyvinyl chloride, and calcium powder, and then add the foaming agent and K-400 foaming regulator and mix again;

[0056] S3. Extrusion: Put the mixture into an extruder. After the mixture melts and is uniformly blended, add a flame retardant, a calcium-zinc stabilizer, chlorinated polyethylene, stearic acid, and polyethylene oxide wax, and blend them uniformly. Then extrude and shape the blended material.

[0057] S4. Forming and Cooling: The extruded mixture is cooled and vacuum shaped through a die.

[0058] S5. Cutting and Trimming: The formed product is cut and trimmed according to production requirements.

[0059] S6. Inspection: The quality of the product is inspected, and its dimensions, appearance, and performance are checked. After passing the inspection, it is produced and stored in the warehouse.

[0060] Example 3

[0061] The fireproof and flame-retardant wood-stone material comprises the following components in parts by weight: 120 parts of stone powder, 80 parts of wood powder, 50 parts of polyvinyl chloride, 25 parts of flame retardant, 20 parts of calcium powder, 5 parts of foaming agent, 15 parts of JINHASS foaming regulator, 7 parts of calcium-zinc stabilizer, 5 parts of acrylate copolymer, 1.5 parts of stearic acid, and 0.6 parts of oxidized polyethylene wax.

[0062] The flame retardant comprises a shell layer and a core layer with a mass ratio of 1.5:1.

[0063] The main components of the shell layer are a phosphorus-based flame retardant and polybutylene adipate terephthalate, and the mass of the phosphorus-based flame retardant is 30% of the mass of polybutylene adipate terephthalate.

[0064] The main components of the core layer are an aerosol fire extinguishing agent and a carbon fiber reinforcement with a mass ratio of 1:2.4, and the aerosol fire extinguishing agent is dispersed in the framework of the carbon fiber reinforcement.

[0065] The foaming agent comprises: 65% of sodium dodecyl sulfate, 20% of sodium fatty alcohol polyoxyethylene ether sulfate, and 15% of polyethylene fatty acid ester.

[0066] The preparation method of the fireproof and flame-retardant wood-stone material specifically comprises the following steps:

[0067] S1. Raw Material Preparation: Weigh the above raw materials according to parts by weight.

[0068] S2. Mixing and Batching: First, mix the stone powder, wood powder, polyvinyl chloride, and calcium powder evenly, and then add the foaming agent and the foaming regulator and mix again.

[0069] S3. Extrusion: Put the mixed material into an extruder. After the mixed material melts and is blended evenly, add the flame retardant, stabilizer, impact modifier, stearic acid, and oxidized polyethylene wax, and blend evenly. Then extrude the blended material into a shape.

[0070] S4. Forming and Cooling: The extruded mixture is cooled and vacuum shaped through a die.

[0071] S5. Cutting and Trimming: The formed product is cut and trimmed according to production requirements.

[0072] S6. Detection: Conduct quality inspection on the products, check their dimensions, appearance and performance. After passing the inspection, they are produced and stored in the warehouse.

[0073] Comparative Example 1, the difference from Example 2 is that:

[0074] The flame retardant used is magnesium hydroxide.

[0075] Comparative Example 2, the difference from Example 2 is that:

[0076] The flame retardant used is a nitrogen-based flame retardant.

[0077] Comparative Example 3, the difference from Example 2 is that:

[0078] The flame retardant used is an aerogel fire extinguishing agent.

[0079] Comparative Example 4, the difference from Example 2 is that:

[0080] The flame retardant used is a mixture of a nitrogen-based flame retardant and an aerogel fire extinguishing agent with a mass ratio of 1.25:1.

[0081] Comparative Example 5, the difference from Example 2 is that:

[0082] When preparing the wood-stone material, first mix the stone powder, wood powder, polyvinyl chloride, and calcium powder evenly, and then add the foaming agent, K-400 foaming regulator, flame retardant, calcium-zinc stabilizer, chlorinated polyethylene, stearic acid, and polyethylene oxide and mix again; after mixing evenly, put the mixture into an extruder for extrusion.

[0083] Comparative Example 6, the difference from Example 2 is that:

[0084] When preparing the wood-stone material, add all the stone powder, wood powder, polyvinyl chloride, calcium powder, foaming agent, K-400 foaming regulator, flame retardant, calcium-zinc stabilizer, chlorinated polyethylene, stearic acid, and polyethylene oxide and mix them together; after mixing evenly, put the mixture into an extruder for extrusion.

[0085] Comparative Example 7, the difference from Example 2 is that:

[0086] The mass ratio of the shell layer to the core layer is 0.8:1.

[0087] Comparative Example 8, the difference from Example 2 is that:

[0088] The mass ratio of the shell layer to the core layer is 1.7:1.

[0089] Comparative Example 9, the difference from Example 2 is that:

[0090] The mass of the nitrogen-based flame retardant is 15% of the mass of polyacrylic acid.

[0091] Comparative Example 10, the difference from Example 2 lies in that:

[0092] The mass of the nitrogen-based flame retardant is 35% of the mass of polyacrylic acid.

[0093] Comparative Example 11, the difference from Example 2 lies in that:

[0094] The mass ratio of the aerosol fire extinguishing agent to the carbon fiber reinforcement is 1:1.7.

[0095] Comparative Example 12, the difference from Example 2 lies in that:

[0096] The mass ratio of the aerosol fire extinguishing agent to the carbon fiber reinforcement is 1:2.7.

[0097] Comparative Example 13, the difference from Example 2 lies in that:

[0098] The foaming agent includes: 100% sodium dodecyl sulfate.

[0099] Comparative Example 14, the difference from Example 2 lies in that:

[0100] The foaming agent includes: 100% sodium alcohol polyoxyethylene ether sulfate.

[0101] Comparative Example 15, the difference from Example 2 lies in that:

[0102] The foaming agent includes: 58% sodium dodecyl sulfate, 42% sodium alcohol polyoxyethylene ether sulfate.

[0103] Comparative Example 16, the difference from Example 2 lies in that:

[0104] Replace sodium dodecyl sulfate in the foaming agent with sodium dodecyl benzene sulfonate.

[0105] Comparative Example 17, the difference from Example 2 lies in that:

[0106] Replace sodium alcohol polyoxyethylene ether sulfate with fatty alcohol polyoxyethylene ether phosphate.

[0107] Comparative Example 18, the difference from Example 2 lies in that:

[0108] The foaming agent includes: 45% sodium dodecyl sulfate, 30% sodium alcohol polyoxyethylene ether sulfate, 25% polyoxyethylene fatty acid ester.

[0109] Comparative Example 19, the difference from Example 2 lies in that:

[0110] The foaming agent includes: 65% sodium dodecyl sulfate, 15% sodium alcohol polyoxyethylene ether sulfate, 20% polyoxyethylene fatty acid ester.

[0111] Performance detection

[0112] 1. Flame retardancy performance detection

[0113] The wood-stone materials prepared in Examples 1-3 and Comparative Examples 1-12 were subjected to flame retardancy performance detection, and the heat release rate and oxygen index were used for characterization. The detection data are recorded in Table 1 below.

[0114] Table 1 - Flame retardancy performance detection data of Examples 1-3 and Comparative Examples 1-12

[0115]

[0116]

[0117] It can be seen from the data in Table 1 that:

[0118] (1) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 1-4 that using inorganic flame retardants or organic flame retardants alone, or using the core-shell double-layer structure flame retardant of the present invention in combination with the core-layer aerogel fire extinguishing agent, cannot achieve the fire prevention and flame retardant effects that can be achieved by the flame retardant prepared into the core-shell double-layer structure of the present invention;

[0119] (2) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 5-6 that during the preparation of wood-stone materials, the addition sequence and blending method of raw materials will affect the fire prevention and flame retardant performance of the product. Adopting the addition sequence of the present invention is more conducive to obtaining products with higher flame retardancy;

[0120] (3) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 7-8 that the mass ratio of the core layer to the shell layer will affect the flame retardant effect of the flame retardant. Therefore, the mass ratio of the two layers should be controlled within a reasonable range to obtain a flame retardant with better flame retardant performance, thereby preparing a wood-stone material with better flame retardant performance;

[0121] (4) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 9-10 that the addition ratio of the main component nitrogen-based flame retardant in the shell layer to polyacrylic acid will affect the flame retardant effect of the flame retardant. The possible reason is that if the addition of polyacrylic acid is too much, it will affect its decomposition rate, thereby affecting the exposure rate of the core layer. And if the relative addition of nitrogen-based flame retardant is too little, it will also affect the flame retardant effect at the beginning of the fire; if the addition of polyacrylic acid is too little, the exposure rate of the core layer is too fast, which will also affect the flame retardant stability and long-term flame retardancy of the flame retardant;

[0122] (5) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 11-12 that the addition ratio of the main components of the aerosol fire extinguishing agent in the core layer to the carbon fiber reinforcement affects the flame retardant effect of the flame retardant. The possible reason is that excessive addition of the aerosol fire extinguishing agent will affect the performance of the flame retardant, while too little addition will lead to insufficient flame retardant effect. Therefore, it is necessary to control the mass ratio of the aerosol fire extinguishing agent to the carbon fiber reinforcement within a suitable range.

[0123] 2. Mechanical property testing

[0124] The wood-stone materials prepared in Examples 1-3 and Comparative Examples 13-19 were taken for mechanical property testing, and the tensile strength and impact strength were used for characterization. The test data are recorded in Table 2 below.

[0125] Table 2 - Mechanical property test data of Examples 1-3 and Comparative Examples 13-19

[0126] Specimen Tensile strength (MPa) <![CDATA[Impact strength (kJ / m 2 )]]> Example 1 45.3 19.5 Example 2 46.5 21.8 Example 3 44.8 20.2 Comparative Example 13 34.5 13.4 Comparative Example 14 32.9 13.0 Comparative Example 15 37.4 15.1 Comparative Example 16 36.7 14.0 Comparative Example 17 38.4 16.3 Comparative Example 18 41.8 17.4 Comparative Example 19 42.1 17.9

[0127] It can be seen from the data in Table 2 that:

[0128] (1) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 13-17 that there is a synergistic effect among the components of the foaming agent used in the present invention. Randomly replacing or using only one of the components cannot achieve the technical effects that can be achieved by the composite foaming agent of the present invention, that is, improving the compatibility and dispersion uniformity among the raw materials, thereby improving the mechanical properties of the prepared wood-stone materials;

[0129] (2) It can be seen from the experimental data of Examples 1-3 and Comparative Examples 18-19 that the addition amounts of the components of the foaming agent used in the present invention need to be controlled within a reasonable range to maximize the role of the foaming agent and achieve the strengthening effect.

[0130] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0131] 1. The flame retardant used in the present invention has a core-shell structure, and different flame retardant / extinguishing components are selected for the shell layer and the core layer respectively. It can not only play an excellent fireproof and flame retardant role during daily use, but also play different degrees of flame retardant and extinguishing roles at different stages of a fire. The specific principle of extinguishing is as follows: Due to the addition of the flame retardant of the present invention, the ignition point of the wood and stone materials is greatly increased, and the organic flame retardant in the shell layer can play an excellent flame retardant effect. Therefore, there is a significant improvement in the daily fire prevention performance; when a fire just starts, first, the organic flame retardant in the shell layer plays a flame retardant role. At this stage, the fire may be stopped, or the fire may be delayed by the flame retardant effect of the organic flame retardant, buying more rescue time for the trapped people; when the continuous occurrence of the fire causes the surrounding temperature to rise rapidly, the degradable resin begins to decompose, the aerosol fire extinguishing agent material in the core layer is exposed, and after absorbing heat, a combustion reaction occurs to release effective flame retardant substances and take effect, further retarding or even extinguishing the fire. Therefore, applying this flame retardant to wood and stone materials can effectively improve the fireproof and flame retardant performance of wood and stone materials.

[0132] 2. The main components of the shell layer structure of the flame retardant of the present invention are selected as organic flame retardants and degradable resins. On the one hand, the compatibility between organic substances is better, which can improve the stability of the flame retardant itself. On the other hand, compared with conventional inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide, the flame retardant of the present invention has better dispersibility in wood and stone materials, which can make the properties of the prepared wood and stone materials more stable and extend the fireproof and flame retardant time.

[0133] 3. The mass ratio between the core layer and the shell layer, the mass ratio between the main components of the core layer, and the mass ratio between the main components of the shell layer of the present invention all need to be controlled within a reasonable range to give full play to the flame retardant performance of the flame retardant, so as to ensure the effective improvement of the flame retardant performance of wood and stone materials.

[0134] 4. The components of the foaming agent of the present invention have a synergistic effect, which can improve the compatibility of the wood and stone material system and the dispersion uniformity between raw materials, thereby improving the mechanical properties such as the strength of the prepared product.

[0135] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0136] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing wood and stone materials, characterized in that: include: Weigh 100-120 parts of stone powder, 50-80 parts of wood powder, 30-50 parts of polyvinyl chloride, 15-25 parts of flame retardant, 10-20 parts of calcium powder, 2-2.5 parts of foaming agent, 10-15 parts of foaming regulator, 5-7 parts of stabilizer, 2-5 parts of anti-impact agent, 0.6-1.5 parts of stearic acid and 0.4-0.6 parts of oxidized polyethylene wax according to weight; First, mix the stone powder, wood powder, polyvinyl chloride and calcium powder evenly, then add the foaming agent and foaming regulator and mix again; The mixed material is put into an extruder, and after the mixed material is melted and blended evenly, a flame retardant, a stabilizer, an impact agent, stearic acid and oxidized polyethylene are added, and the mixture is blended evenly, and the mixed material is extruded to form; The flame retardant comprises a shell layer and a core layer, the main components of the shell layer are organic flame retardant and degradable resin, and the main component of the core layer is an aerosol fire extinguishing agent; the mass ratio of the shell layer to the core layer is (1-1.5):1; the mass of the organic flame retardant is 20-30% of the mass of the degradable resin; the organic flame retardant is a phosphorus-based flame retardant or a nitrogen-based flame retardant; the degradable resin is a mixture of one or more of polylactic acid, polyacrylic acid or polybutylene terephthalate adipate; the foaming agent comprises: 50-65% of sodium dodecyl sulfate, 20-35% of fatty alcohol polyoxyethylene ether sodium sulfate, and 10-20% of polyoxyethylene fatty acid ester.

2. The method for preparing wood and stone materials according to claim 1, characterized in that: The main component of the core layer also includes carbon fiber reinforcement, the aerosol fire extinguishing agent is dispersed in the skeleton of the carbon fiber reinforcement, and the mass ratio of the aerosol fire extinguishing agent to the carbon fiber reinforcement is 1:(2-2.4).

3. The method for preparing wood and stone materials according to claim 1, characterized in that: The foaming regulator is any one of ZB-530, K-400 and JINHASS foaming regulators.

4. The method for preparing wood and stone materials according to claim 1, characterized in that: The stabilizer is an organic tin stabilizer or a calcium zinc stabilizer.

5. The method for preparing wood and stone materials according to claim 1, characterized in that: The anti-impact agent is chlorinated polyethylene or acrylic copolymer.

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