Formula and production method of straw wood-plastic mute floor

Abstract

The invention discloses a formula of a straw wood-plastic mute floor and a production method of the straw wood-plastic mute floor. The straw wood-plastic silent floor comprises the following components: 25-45 parts of straw fibers, 10-20 parts of wood-plastic fibers, 10-20 parts of wood-plastic fibers, and 10-20 parts of 30 to 50 parts of a plastic matrix; 1 to 5 parts of a compatibilizer; 0.5 to 3 parts of a lubricant; 0.5-2 parts of a foaming agent; 1-5 parts of a flame retardant; and 5-15 parts of a sound insulation filler. The invention discloses a production method of a straw wood-plastic mute floor. The production method comprises the following steps: S1, straw pretreatment; s2, mixing ingredients; s3, standing and aging; and S4, carrying out twin-screw extrusion granulation. Through a unique formula and a production method, the performance of the straw wood-plastic mute floor is remarkably improved, the mechanical performance is improved through the cross-linking agent, the reinforced fibers and the like, the sound insulation is enhanced by compounding the sound insulation filler and a special process, the weather resistance is guaranteed through the light stabilizer, the specific surface layer and the like, the mildew preventive and the process are compounded for mildew prevention, and the antistatic performance is maintained through the specific antistatic agent and the process.

Description

Technical Field

[0001] The present invention relates to the field of straw wood-plastic composite materials, and particularly to a formulation and production method of a straw wood-plastic soundproof floor. Background Art

[0002] Plastic floors have certain waterproof and wear-resistant properties, but their texture is poor, the sound insulation effect is bad, and they may release harmful substances during production and use, posing a potential threat to the environment and human health. Stone floors, although strong and durable, are cold in texture, complex to install, and heavy in weight, requiring high load-bearing capacity of the building structure.

[0003] In recent years, wood-plastic composite materials, as a new type of environmentally friendly material, have gradually attracted attention. Among them, straw wood-plastic materials have become a research hotspot because they can effectively utilize agricultural waste straw, reduce production costs, and at the same time have good mechanical properties and processability. However, there are still many technical problems to be solved in existing straw wood-plastic floors. On the one hand, the compatibility between straw fibers and the plastic matrix is poor, resulting in weak interfacial bonding force inside the composite material, affecting the overall mechanical properties of the material, and prone to phenomena such as delamination and cracking. On the other hand, the sound insulation performance of the floor is not ideal and cannot meet the requirements of modern living environments for quietness. Moreover, ordinary straw wood-plastic floors also have obvious defects in terms of aging resistance, mildew resistance, antistatic performance, etc., and are prone to performance degradation and shortened service life due to factors such as light, humidity, and friction during actual use. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the prior art and propose a formulation and production method of a straw wood-plastic soundproof floor.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A straw wood-plastic soundproof floor, by weight percentage, comprises the following components:

[0007] Straw fibers, 25 parts - 45 parts; plastic matrix, 30 parts - 50 parts; compatibilizer, 1 part - 5 parts; lubricant, 0.5 part - 3 parts; foaming agent, 0.5 part - 2 parts; flame retardant, 1 part - 5 parts; sound insulation filler, 5 parts - 15 parts; coupling agent, 0.5 part - 2 parts; antioxidant, 0.1 part - 1 part; crosslinking agent, 0.5 part - 2 parts; bamboo fibers, 5 - 9 parts; reinforcing fibers, 1 - 3 parts; light stabilizer, 0.3 - 1 part.

[0008] Preferably, 0.5 - 2 parts of a mildew-proof agent is additionally added to the formulation. The mildew-proof agent is a compound of nano-zinc oxide and quaternary ammonium salt mildew-proof agent in a ratio of 1:1, and the particle size of the nano-zinc oxide is 50 - 80 nm.

[0009] A method for producing a straw wood plastic soundproof floor, characterized by comprising the following steps:

[0010] S1. Straw pretreatment: drying the straw fiber to a moisture content of ≤8%, crushing it to 80-120 mesh with a hammer mill, and then putting it into a high-speed mixer, adding a silane coupling agent for surface treatment, and adding a cross-linking agent for pre-cross-linking, the mixing speed is 500-800r / min, and the processing time is 10-15 minutes, so that the surface of the straw fiber is evenly coated with the coupling agent and partially cross-linked, so as to improve the compatibility and bonding with other components;

[0011] S2, mixing ingredients, adding each component into a high-speed mixer according to the formula ratio, mixing for 10-20 minutes at 80-120°C, with a mixing speed of 600-1000r / min, forming a gradient dispersion system through high-speed stirring, so that each component is initially evenly mixed;

[0012] S3, standing and aging, after the ingredients are mixed, the mixture is transferred to a sealed container and left to stand at room temperature for 1-2 hours to allow the ingredients to further diffuse and react with each other, optimize the material properties, and improve the subsequent molding effect;

[0013] S4, twin-screw extrusion granulation, using a twin-screw extruder at 160-200 ° C for melt blending, the extruder has an aspect ratio of 28: 1-40: 1, and a screw speed of 200-300r / min, so that the materials are fully melted and mixed and extruded into granules to obtain uniform wood-plastic composite particles;

[0014] S5, placing the granulated material into a mold, maintaining the pressure at 120° C. and 5 MPa for 3 minutes, initially forming and forming some pores, cooling to 80° C. and maintaining the pressure at 2 MPa for 2 minutes, further stabilizing the pore structure and forming, and forming a body with a gradient density;

[0015] S6, dynamic pressure injection molding, adding pellets into the injection molding machine, injection molding at 180-220℃, the pressure changes periodically during the injection molding process, alternating between 80-120MPa, the mold temperature is controlled at 30-50℃, the holding time is 15-30 seconds, the dynamic pressure promotes the homogenization of the pores and improves the foaming quality;

[0016] S7, ultrasonic assisted dip coating, using an ultrasonic vibration device with a power of 100-200W, which is carried out simultaneously with the dip coating of the wear-resistant layer. The wear-resistant layer is an aluminum oxide coating with a thickness of 0.1-0.3mm. Ultrasonic waves promote the aluminum oxide coating to better penetrate and adhere to the floor surface, thereby improving the adhesion of the coating.

[0017] S8. Double - coating composite. First, apply a water - based polyurethane primer with a thickness of 0.05 - 0.1 mm, and dry and cure it at 50 - 60 °C for 1 - 2 hours. Then, apply a UV - curable acrylate surface layer with a thickness of 0.08 - 0.15 mm, and rapidly cure it by ultraviolet irradiation to form a hard, wear - resistant and shiny surface.

[0018] S9. Secondary hot - pressing treatment. After the multi - layer structure is hot - pressed and compounded, perform secondary hot - pressing. The hot - pressing temperature is 130 - 140 °C, the pressure is 4 - 6 MPa, and the pressure - holding time is 5 - 8 minutes, so that the bonding between layers is closer and the overall structural stability of the floor is improved.

[0019] S10. Surface texture treatment. After the UV - curable acrylate surface layer is coated, roll - press it with a pressure roller with a specific texture. The pressure of the pressure roller is 2 - 3 MPa, and textures such as imitation wood grain or imitation stone grain are formed on the floor surface, increasing the aesthetic appearance and anti - slip performance of the floor, and the anti - slip coefficient is increased by 20% - 30%.

[0020] Preferably, it also contains 0.2 - 1 part of an antistatic agent, and the antistatic agent is an alkyl sulfonate.

[0021] Preferably, before the straw pretreatment in step S1, screen and remove impurities from the straw fibers. Use a vibrating screen to remove impurities and large particles in the straw fibers to ensure the purity of the straw fibers, which is beneficial to subsequent processing and product performance improvement.

[0022] Preferably, during the dynamic pressure injection molding process in step S6, the injection speed is controlled at 30 - 50 g / s, and the injection speed and pressure change are coordinated and regulated to further optimize the cell structure, so that the sound insulation performance of the material is improved by 10% - 15%.

[0023] Preferably, during the ultrasonic - assisted dip - coating process in step S7, the ultrasonic frequency is 20 - 30 kHz. By optimizing the frequency parameters, the wear - resistant performance of the aluminum oxide coating is improved by 30% - 40%, and the wear - resistant rotation speed exceeds 15000 revolutions.

[0024] Preferably, in the double - coating composite process of step S8, 5% - 10% of nano - silica is added to the water - based polyurethane primer to further improve the hardness and wear - resistance of the primer and enhance the protection effect on the base layer.

[0025] The present invention has the following beneficial effects:

[0026] 1. Through unique formulation design, such as adding composite fibers, reinforcing fibers, sound insulation fillers, and rationally using crosslinking agents, light stabilizers, etc., the floor has excellent mechanical properties. The flexural strength is increased by 25%-35%, which can effectively withstand various pressures in daily use and is not easily deformed; the cell size is reduced by 40%-50%, and combined with the sound insulation filler composed of EVA resin and vermiculite powder, the sound insulation performance is significantly improved, meeting the requirements of modern living environments for quiet spaces. At the same time, the addition of antioxidants, mildew inhibitors, and antistatic agents enhances the aging resistance, mildew resistance, and antistatic performance of the floor respectively, greatly extending the service life of the floor and reducing the maintenance cost.

[0027] 2. Using a large amount of straw fiber as raw material realizes the resource utilization of agricultural waste, reduces the pollution caused by straw burning to the environment, and conforms to the concept of green environmental protection. In addition, recyclable materials such as polypropylene and polyethylene can be selected as the plastic matrix, further reducing the impact on the environment. Moreover, the processes and additives used in the production process minimize the generation and emission of harmful substances while ensuring performance, providing users with a more environmentally friendly and healthy floor product.

[0028] 3. As an agricultural waste, straw is widely sourced and low-cost. Using straw fiber significantly reduces the raw material cost. Innovative processes in the production method, such as gradient molding technology, dynamic pressure injection molding, etc., improve production efficiency, reduce energy consumption and scrap rate during the production process. At the same time, the excellent performance of the floor extends its service life, reducing the product replacement frequency, and bringing considerable economic benefits to both users and manufacturers in the long run. Brief Description of the Drawings

[0029] Figure 1 It is a broken line change diagram of the flexural strength of the floors made of the experimental group, control group 1, and control group 2 of Example 1 proposed by the present invention;

[0030] Figure 2 It is a broken line change diagram of the sound insulation amount of the floors made of the experimental group, control group 1, and control group 2 of Example 2 proposed by the present invention. Detailed Description of the Invention

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0032] A straw wood-plastic soundproof floor, by weight percentage, comprises the following components:

[0033] Straw fiber, 25 parts - 45 parts, the straw fiber is one or a combination of rice husk, wheat straw, and corn cob. After being pulverized, the fiber length is mainly distributed between 0.5 - 2 mm to ensure uniform dispersion and good reinforcement effect in the composite material;

[0034] Plastic matrix, 30 parts - 50 parts, the plastic matrix is polypropylene (PP), polyethylene (PE), or polyvinyl chloride (PVC). The melt flow rate of the PP plastic matrix is 2 - 5 g / 10 min to ensure fluidity and formability during processing;

[0035] Compatibilizer, 1 part - 5 parts, the compatibilizer is maleic anhydride grafted polypropylene (MAPP) with a grafting rate of 0.8% - 1.5%, which effectively improves the interfacial compatibility between the straw fiber and the plastic matrix and enhances the overall bonding strength of the material;

[0036] Lubricant, 0.5 part - 3 parts, the lubricant is one or a combination of stearic acid, calcium stearate, or paraffin. By reasonably adjusting the type and proportion of the lubricant, the internal friction of the material during processing can be effectively reduced, and the production efficiency can be improved;

[0037] Foaming agent, 0.5 part - 2 parts, the foaming agent is azodicarbonamide (AC) with a decomposition temperature between 190 - 210 °C. It decomposes to produce gas in the molten state of the plastic matrix, forming a uniform and fine cell structure to improve the sound insulation and heat insulation performance of the floor;

[0038] Flame retardant, 1 part - 5 parts, the flame retardant is magnesium hydroxide or antimony trioxide. The average particle size of magnesium hydroxide is 1 - 3 μm, and the particle size of antimony trioxide is 0.5 - 1.5 μm. It can form a heat - insulating and oxygen - isolating protective film during combustion, effectively improving the flame retardant grade of the floor;

[0039] Sound insulation filler, 5 parts - 15 parts, which is compounded from EVA resin and vermiculite powder in a ratio of 1:0.5 - 1.5. The vermiculite powder has been pretreated, with a smooth surface and a particle size of 50 - 100 mesh, and it works synergistically with the EVA resin to enhance the sound absorption and blocking effect;

[0040] Coupling agent, 0.5 part - 2 parts, a silane coupling agent is selected, and its molecular structure contains functional groups that can chemically react with the hydroxyl groups on the surface of the straw fiber and the plastic matrix to further strengthen the interfacial bonding;

[0041] Antioxidant, 0.1 part - 1 part, a hindered phenol antioxidant such as pentaerythritol tetra[β-(3,5 - di - tert - butyl - 4 - hydroxyphenyl)propionate], which effectively inhibits the oxidative degradation of the material during processing and use, and extends the service life of the floor;

[0042] A crosslinking agent, 0.5 to 2 parts, selected from dicumyl peroxide (DCP), initiates the crosslinking reaction of the plastic matrix at a certain temperature to form a three-dimensional network structure, improving the strength, heat resistance and chemical corrosion resistance of the material;

[0043] Bamboo fiber, 5 - 9 parts, the bamboo fiber is degummed and has a length of 1 - 3 mm, complementing the advantages of straw fiber to enhance the comprehensive mechanical properties of the material;

[0044] Reinforcing fiber, 1 - 3 parts, the added chopped glass fiber has a length of 3 - 5 mm, and the surface of the glass fiber is treated with a sizing agent, having good adhesion with the plastic matrix, significantly improving the mechanical properties such as the tensile strength and flexural strength of the floor;

[0045] Light stabilizer, 0.3 - 1 part, which is a benzophenone light stabilizer, such as 2,4 - dihydroxybenzophenone, can effectively absorb ultraviolet light, convert light energy into heat energy and dissipate it, preventing the floor from aging and fading due to light exposure and improving weather resistance.

[0046] An additional 0.5 - 2 parts of a mildew - proof agent is added to the formula. The mildew - proof agent is a compound of nano - zinc oxide and a quaternary ammonium salt - type mildew - proof agent in a ratio of 1:1. The particle size of the nano - zinc oxide is 50 - 80 nm. It also contains 0.2 - 1 part of an antistatic agent, and the antistatic agent is an alkyl sulfonate type.

[0047] A production method of a straw - wood plastic sound - proof floor includes the following steps:

[0048] S1. Straw pretreatment: Dry the straw fiber to a moisture content ≤ 8%, crush it to 80 - 120 mesh using a hammer mill, then put it into a high - speed mixer, add a silane coupling agent for surface treatment, and at the same time add a crosslinking agent for pre - crosslinking. The mixing speed is 500 - 800 r / min, and the treatment time is 10 - 15 minutes, so that the surface of the straw fiber is evenly coated with the coupling agent and partially crosslinked, improving the compatibility and bonding force with other components;

[0049] S2. Batching and mixing: Add each component to the high - speed mixer according to the formula ratio, mix at 80 - 120 °C for 10 - 20 minutes, and the mixing speed is 600 - 1000 r / min. A gradient dispersion system is formed through high - speed stirring to preliminarily and evenly mix each component;

[0050] S3. Static aging: After batching and mixing, transfer the mixed material to a sealed container and let it stand at room temperature for 1 - 2 hours, so that each component further diffuses and reacts with each other, optimizing the material properties and improving the subsequent molding effect;

[0051] S4. Twin-screw extrusion granulation: Using a twin-screw extruder, melt blending is carried out at 160 - 200 °C. The aspect ratio of the extruder is 28:1 - 40:1, and the screw speed is 200 - 300 r / min, so that the materials are fully melted and mixed and then extruded into pellets to obtain uniform wood-plastic composite pellets;

[0052] S5. Put the granulated materials into a mold, keep the pressure at 5 MPa at 120 °C for 3 minutes for preliminary forming and to form some foam cells, then cool down to 80 °C and keep the pressure at 2 MPa for 2 minutes to further stabilize the foam cell structure and complete the forming, thus forming a blank with a gradient density;

[0053] S6. Dynamic pressure injection molding: Add the pellets to an injection molding machine and inject at 180 - 220 °C. During the injection process, the pressure changes periodically, alternating between 80 - 120 MPa, the mold temperature is controlled at 30 - 50 °C, and the holding pressure time is 15 - 30 seconds. The dynamic pressure promotes the homogenization of the foam cells and improves the foaming quality;

[0054] S7. Ultrasonic-assisted dip coating: Use an ultrasonic vibration device with a power of 100 - 200 W, which is carried out synchronously when dipping the wear-resistant layer. The wear-resistant layer is an aluminum oxide coating with a thickness of 0.1 - 0.3 mm. The ultrasonic waves promote the better penetration and adhesion of the aluminum oxide coating on the floor surface, improving the coating adhesion;

[0055] S8. Double-coating composite: First, coat a waterborne polyurethane primer with a thickness of 0.05 - 0.1 mm and dry and cure it at 50 - 60 °C for 1 - 2 hours; then coat a UV-curable acrylate top layer with a thickness of 0.08 - 0.15 mm, and quickly cure it by ultraviolet irradiation to form a hard, wear-resistant and shiny surface;

[0056] S9. Secondary hot pressing treatment: After the multi-layer structure is hot-pressed and compounded, perform secondary hot pressing. The hot pressing temperature is 130 - 140 °C, the pressure is 4 - 6 MPa, and the holding pressure time is 5 - 8 minutes, so that the combination between layers is more compact and the overall structural stability of the floor is improved;

[0057] S10. Surface texture treatment: After the UV-curable acrylate top layer is coated, roll pressing is carried out through a pressure roller with a specific texture. The pressure of the pressure roller is 2 - 3 MPa, and textures such as imitation wood grain or imitation stone grain are formed on the floor surface, increasing the aesthetics and anti-slip performance of the floor, and the anti-slip coefficient is increased by 20% - 30%.

[0058] Before the straw pretreatment in step S1, screen and remove impurities from the straw fibers. Use a vibrating screen to remove impurities and large particles in the straw fibers to ensure the purity of the straw fibers, which is beneficial to subsequent processing and the improvement of product performance.

[0059] In step S6 of the dynamic pressure injection molding process, the injection speed is controlled at 30 - 50 g / s, and the injection speed and pressure change are coordinated and regulated to further optimize the cell structure, increasing the sound insulation performance of the material by 10% - 15%.

[0060] In step S7 of the ultrasonic-assisted dip coating process, the ultrasonic frequency is 20 - 30 kHz. By optimizing the frequency parameters, the wear resistance of the aluminum oxide coating is increased by 30% - 40%, and the wear resistance rotation speed exceeds 15,000 revolutions.

[0061] In step S8 of the double-coating composite process, 5% - 10% of nano-silica is added to the waterborne polyurethane primer to further improve the hardness and wear resistance of the primer and enhance the protection effect on the base layer.

[0062] Example 1: Explore the influence of the formula and production method on the mechanical properties

[0063] Experimental group

[0064] Formula: Use the complete formula listed in claim 1 of the present invention, including 35 parts of straw fiber, 40 parts of plastic matrix (PP, melt flow rate 3 g / 10 min), 3 parts of compatibilizer, 1.5 parts of lubricant, 1 part of foaming agent, 3 parts of flame retardant, 10 parts of sound insulation filler, 1 part of coupling agent, 0.5 part of antioxidant, 1 part of crosslinking agent, composite fiber (straw fiber and bamboo fiber are mixed in a ratio of 4:1), 2 parts of reinforcing fiber, 0.6 part of light stabilizer, as well as 0.5 part of mildew preventive and 0.5 part of antistatic agent.

[0065] Production method: Use the complete production method listed in claim 4 of the present invention. That is, during the straw pretreatment, the straw fiber is dried to a moisture content ≤ 8%, crushed to 80 - 120 mesh by a hammer mill, put into a high-speed mixer, and surface-treated with a silane coupling agent, while adding a crosslinking agent for pre-crosslinking. The mixing speed is 500 - 800 r / min, and the treatment time is 10 - 15 minutes. When mixing the ingredients, each component is added to the high-speed mixer according to the formula ratio, and mixed at 80 - 120 °C for 10 - 20 minutes, with a mixing speed of 600 - 1000 r / min. Then, steps such as static aging, twin-screw extrusion granulation, gradient molding, dynamic pressure injection molding, ultrasonic-assisted dip coating, double-coating composite, secondary hot pressing treatment, and surface texture treatment are carried out in sequence.

[0066] Control group 1

[0067] Formula: Lack of crosslinking agent, and other components and contents are the same as those in the experimental group.

[0068] Production method: Use the complete production method listed in claim 4 of the present invention.

[0069] Control group 2

[0070] Formulation: No reinforcing fibers are added, and other components and their contents are the same as those in the experimental group.

[0071] Production method: Extrusion granulation is carried out using a traditional single-screw extruder, and there are no steps of gradient molding and dynamic pressure injection molding. It is directly injection-molded, and other steps are the same as those in the production method of the experimental group.

[0072] At time points of 0 months, 3 months, 6 months, 9 months, and 12 months, the static bending strength (MPa) of the floors made by the experimental group, control group 1, and control group 2 was detected, and the test results are shown in the following table:

[0073] Time / Group Experimental Group Control Group 1 Control Group 2 0 Month 55 50 45 3 Months 53 48 42 6 Months 50 45 41 9 Months 48 44 39 12 Months 47 42 38

[0074] The data content in the above table is made into a line chart, as Figure 1 shown. It can be seen from the table data and Figure 1 the trend of the line chart that, due to the complete formulation and production method, the static bending strength of the experimental group is significantly higher than that of control group 1 and control group 2. The absence of the cross-linking agent causes a significant decrease in the mechanical properties of control group 1, while the static bending strength of control group 2 is far lower than that of the experimental group because of the backward production method and the absence of reinforcing fibers. This indicates that the cross-linking agent and reinforcing fibers play a key role in improving the mechanical properties of the floor, and at the same time, an advanced production process helps to form a more stable structure and further enhance the performance.

[0075] Example 2: Explore the influence of formulation and production method on sound insulation performance

[0076] Experimental group

[0077] Formulation: Use the formulation of claim 1.

[0078] Production method: Use the complete production method of claim 4.

[0079] Control group 1:

[0080] Formulation: Only a single EVA resin is used as the sound insulation filler, with a dosage of 10 parts, and other components and their contents are the same as those in the experimental group.

[0081] Production method: The complete production method of claim 4.

[0082] Control group 2:

[0083] Formulation: The same as that of the experimental group.

[0084] Production method: Adopt the production process of ordinary wood-plastic floors, without special steps such as gradient molding, dynamic pressure injection molding, and ultrasonic-assisted dip coating. Other steps are the same as those in the production method of the experimental group.

[0085] The sound insulation quantity (dB) of the floors made by the experimental group, control group 1, and control group 2 was detected at the time points of 0 months, 3 months, 6 months, 9 months, and 12 months respectively. The test results are shown in the following table:

[0086] Time / Group Experimental Group Control Group 1 Control Group 2 0 Month 28 22 18 3 Months 26.8 21.6 17.5 6 Months 26.2 21.1 17.2 9 Months 26 20.5 16.4 12 Months 25 20 16

[0087] The above table data content was made into a line chart, as Figure 2 shown. From the table data and Figure 2 the trend of the line chart, it can be seen that the sound insulation quantity of the experimental group is significantly higher than that of the control groups. For control group 1, since the sound insulation filler was not in a compound form, the sound insulation effect was greatly reduced; for control group 2, due to the lack of key steps in the production method, a uniform cell structure and an effective wear-resistant layer could not be formed, resulting in poor sound insulation performance. Thus, it can be seen that the compound sound insulation filler and the unique production process are of great significance for improving the sound insulation performance of the floor.

[0088] Example 3: Explore the influence of the formula and production method on weather resistance

[0089] Experimental group:

[0090] Formula: According to the complete formula of claim 1.

[0091] Production method: Adopt the complete production method of claim 4.

[0092] Control group 1:

[0093] Formula: No light stabilizer was added, and other components and their contents were the same as those of the experimental group.

[0094] Production method: Adopt the complete production method of claim 4.

[0095] Control group 2:

[0096] Formula: The same as that of the experimental group.

[0097] Production method: In the double-coating composite process, only one layer of ordinary paint was applied as the surface layer, and the UV-cured acrylate surface layer coating was not carried out. Other steps were the same as those of the production method of the experimental group.

[0098] The degree of floor fading of the experimental group, control group 1, and control group 2 was detected at the time points of 0 months, 3 months, 6 months, 9 months, and 12 months respectively. The test results are shown in the following table:

[0099] Time / Group Experimental Group Control Group 1 Control Group 2 0 Month None None None 3 Months Slight Obvious Relatively Obvious 6 Months Mild Severe Severe 9 Months Mild Severe Severe 12 Months Mild Severe Severe

[0100] The test results show that the experimental group performed excellently in terms of weather resistance. The absence of light stabilizer caused the control group 1 to fade rapidly under light, while the control group 2 could not effectively resist the erosion of the external environment due to improper surface treatment, resulting in severe fading. This fully demonstrates that production processes such as light stabilizer and UV-cured acrylate surface layer are crucial for improving the weather resistance of the floor.

[0101] Example 4: Explore the influence of formulation and production method on mildew resistance

[0102] Experimental group:

[0103] Formulation: Use the formulation of claim 1 and include the mildew-proof agent formulation of claim 2.

[0104] Production method: The complete production method of claim 4.

[0105] Control group 1:

[0106] Formulation: Use the formulation of claim 1, use single nano-zinc oxide as the mildew-proof agent with a dosage of 1 part, and the other components and their contents are the same as those of the experimental group.

[0107] Production method: The complete production method of claim 4.

[0108] Control group 2:

[0109] Formulation: The same as that of the experimental group.

[0110] Production method: Adopt the production process of ordinary wood-plastic floor, without the steps of static aging and double-coating compounding process, and the other steps are the same as those of the production method of the experimental group.

[0111] At the time points of 0 months, 3 months, 6 months, 9 months, and 12 months, the mildew growth conditions of the floors made by the experimental group, control group 1, and control group 2 were detected respectively, and the test results are shown in the following table:

[0112] Time / Group Experimental Group Control Group 1 Control Group 2 0 Month None None None 3 Months Very Little More Large Amount 6 Months Little Large Amount and Spreading Large Amount and Widely Spreading 9 Months Little Large Amount and Spreading Large Amount and Widely Spreading 12 Months Little Large Amount and Spreading Large Amount and Widely Spreading

[0113] The test results show that the experimental group had the best mildew-proof effect. Due to the single mildew-proof agent formulation, the control group 1 could not effectively inhibit the growth of mildew; due to the lack of key steps in the production process, the control group 2 could not make the mildew-proof agent play its full role and could not form an effective protective film, resulting in serious mildew growth. This indicates that the combined action of the compound mildew-proof agent formulation and the complete production process can significantly improve the mildew-proof performance of the floor.

[0114] Example 5: Explore the influence of formulation and production method on antistatic performance

[0115] Experimental group:

[0116] Formulation: Use the formulation of claim 1 and contain the antistatic agent of claim 3.

[0117] Production method: The complete production method of Claim 4.

[0118] Control Group 1:

[0119] Formulation: Use the formulation of Claim 1, use other types of antistatic agents, with a dosage of 0.5 parts, and other components and their contents are the same as those in the experimental group.

[0120] Production method: The complete production method of Claim 4.

[0121] Control Group 2:

[0122] Formulation: The same as that of the experimental group.

[0123] Production method: Adopt the production process of ordinary wood-plastic floors, without ultrasonic-assisted dip coating and double-coating composite processes, and other steps are the same as those of the production method in the experimental group.

[0124] At the time points of 0 months, 3 months, 6 months, 9 months, and 12 months, the surface resistance (Ω) of the floors made by the experimental group, Control Group 1, and Control Group 2 was detected respectively, and the detection results are shown in the following table:

[0125] Time / Group Experimental Group Control Group 1 Control Group 2 0 Month <![CDATA[1×10 10 > <![CDATA[5×10 11 > <![CDATA[1×10 13 > 3 Months <![CDATA[1.1×10 10 > <![CDATA[6×10 11 > <![CDATA[1×10 13 > 6 Months <![CDATA[1.3×10 10 > <![CDATA[8×10 11 > <![CDATA[1×10 13 > 9 Months <![CDATA[1.5×10 10 > <![CDATA[9×10 11 > <![CDATA[1×10 13 > 12 Months <![CDATA[1.6×10 10 > <![CDATA[9.5×10 11 > <![CDATA[1×10 13 >

[0126] The detection results show that the antistatic performance of the experimental group is the best. In Control Group 1, due to the different types of antistatic agents, the effect is not as good as that of the experimental group; in Control Group 2, due to the imperfect production process, it is impossible to ensure the uniform distribution and stable existence of the antistatic agent, resulting in a higher surface resistance. This shows that specific antistatic agent formulations and advanced production processes play a decisive role in maintaining the good antistatic performance of the floor.

[0127] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A straw wood plastic silent floor, characterized in that: By weight percentage, it includes the following components: Straw fiber, 25-45 parts; Plastic matrix, 30-50 parts; Compatibilizer, 1-5 parts; Lubricant, 0.5-3 parts; Foaming agent, 0.5-2 parts; Flame retardant, 1-5 parts; sound insulation filler, 5-15 parts; coupling agent, 0.5-2 parts; antioxidant, 0.1-1 parts; cross-linking agent, 0.5-2 parts; Bamboo fiber, 5-9 parts; Reinforcing fiber, 1-3 parts; light stabilizer, 0.3-1 parts.

2. The straw wood plastic soundproof floor according to claim 1, characterized in that: 0.5-2 parts of a mildew preventer are additionally added to the formula. The mildew preventer is a compound of nano zinc oxide and quaternary ammonium salt mildew preventer in a ratio of 1:

1. The particle size of the nano zinc oxide is 50-80 nm.

3. The straw wood plastic soundproof floor according to claim 1, characterized in that: The invention also contains 0.2-1 part of an antistatic agent, which is an alkyl sulfonate.

4. The method for producing a straw wood plastic soundproof floor according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Straw pretreatment: drying the straw fiber to a moisture content of ≤8%, crushing it to 80-120 mesh with a hammer mill, and then putting it into a high-speed mixer, adding a silane coupling agent for surface treatment, and adding a cross-linking agent for pre-cross-linking, the mixing speed is 500-800r / min, and the processing time is 10-15 minutes, so that the surface of the straw fiber is evenly coated with the coupling agent and partially cross-linked, so as to improve the compatibility and bonding with other components; S2, mixing ingredients, adding each component into a high-speed mixer according to the formula ratio, mixing for 10-20 minutes at 80-120°C, with a mixing speed of 600-1000r / min, forming a gradient dispersion system through high-speed stirring, so that each component is initially evenly mixed; S3, standing and aging, after the ingredients are mixed, the mixture is transferred to a sealed container and left to stand at room temperature for 1-2 hours to allow the ingredients to further diffuse and react with each other, optimize the material properties, and improve the subsequent molding effect; S4, twin-screw extrusion granulation, using a twin-screw extruder at 160-200 ° C for melt blending, the extruder has an aspect ratio of 28: 1-40: 1, and a screw speed of 200-300r / min, so that the materials are fully melted and mixed and extruded into granules to obtain uniform wood-plastic composite particles; S5, placing the granulated material into a mold, maintaining the pressure at 120° C. and 5 MPa for 3 minutes, initially forming and forming some pores, cooling to 80° C. and maintaining the pressure at 2 MPa for 2 minutes, further stabilizing the pore structure and forming, and forming a body with a gradient density; S6, dynamic pressure injection molding, adding pellets into the injection molding machine, injection molding at 180-220℃, the pressure changes periodically during the injection molding process, alternating between 80-120MPa, the mold temperature is controlled at 30-50℃, the holding time is 15-30 seconds, the dynamic pressure promotes the homogenization of the pores and improves the foaming quality; S7, ultrasonic assisted dip coating, using an ultrasonic vibration device with a power of 100-200W, which is carried out simultaneously with the dip coating of the wear-resistant layer. The wear-resistant layer is an aluminum oxide coating with a thickness of 0.1-0.3mm. Ultrasonic waves promote the aluminum oxide coating to better penetrate and adhere to the floor surface, thereby improving the adhesion of the coating. S8, double coating composite, first apply water-based polyurethane primer with a thickness of 0.05-0.1mm, and dry and cure at 50-60℃ for 1-2 hours; Then apply a UV-curing acrylate top layer with a thickness of 0.08-0.15mm, which is quickly cured by ultraviolet radiation to form a hard, wear-resistant surface with good gloss; S9, secondary hot pressing treatment, after the multi-layer structure is hot pressed and laminated, the secondary hot pressing is carried out, the hot pressing temperature is 130-140℃, the pressure is 4-6MPa, and the holding time is 5-8 minutes, so that the layers are more tightly combined and the overall structural stability of the floor is improved; S10, surface texture treatment: after the UV-curing acrylic surface layer is coated, it is rolled with a roller with a specific texture. The roller pressure is 2-3MPa, forming imitation wood grain or imitation stone grain textures on the floor surface, increasing the aesthetics and anti-slip performance of the floor, and the anti-slip coefficient is increased by 20%-30%.

5. The method for producing a straw wood plastic soundproof floor according to claim 4, characterized in that: Before the straw pretreatment in step S1, the straw fibers are screened and impurities are removed, and a vibrating screen is used to remove impurities and large particles in the straw fibers.

6. The method for producing a straw wood plastic soundproof floor according to claim 4, characterized in that: During the dynamic pressure injection molding process in step S6, the injection speed is controlled at 30-50 g / s, and the injection speed and pressure change are coordinated and regulated to further optimize the pore structure and improve the sound insulation performance of the material by 10%-15%.

7. The method for producing a straw wood plastic soundproof floor according to claim 4, characterized in that: In the ultrasonic-assisted dip-coating process of step S7, the ultrasonic frequency is 20-30 kHz. By optimizing the frequency parameters, the wear resistance of the aluminum oxide coating is improved by 30%-40%, and the wear resistance revolution number exceeds 15,000 revolutions.

8. The method for producing a straw wood plastic soundproof floor according to claim 4, characterized in that: In the double-coating composite process of step S8, 5%-10% of nano-silicon dioxide is added to the water-based polyurethane primer to further improve the hardness and wear resistance of the primer and enhance the protective effect on the base layer.

Images