Antistatic composite floor and method for manufacturing the same
Antistatic composite flooring was prepared by three-layer co-extrusion, optimizing the composition of the antistatic layer and wood-plastic layer, and designing a balanced underlayment structure. This solved the problem of poor conductivity of wood-plastic antistatic flooring and improved the antistatic effect and wear resistance of the flooring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGZHOU JINHAI ANTI-STATIC FLOOR CO LTD
- Filing Date
- 2023-10-09
- Publication Date
- 2026-06-02
AI Technical Summary
Existing wood-plastic antistatic flooring materials have poor conductivity and thus affect their antistatic effect because the chemical structure of the wood matrix contains only a small number of active groups.
Antistatic composite flooring is prepared by three-layer co-extrusion, including a wood-plastic layer and an antistatic layer covering both sides. The antistatic layer is composed of antistatic agent, PVC and functional additives. By optimizing the composition of the antistatic layer and the wood-plastic layer, the conductivity is improved by using antistatic ionic liquid, graphene and silicon carbide aerogel. At the same time, the raised structure of the balancing pad is designed to optimize charge conduction.
It improves the structural compactness and antistatic performance of antistatic composite flooring, enhances the mechanical strength and wear resistance of flooring materials, improves antistatic effect, and reduces static electricity defects caused by friction.
Smart Images
Figure CN117306810B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of flooring materials technology, specifically relating to an antistatic composite floor and its preparation method. Background Technology
[0002] Wood-plastic composite (WPC) flooring is commonly used for interior flooring in various buildings, such as homes, factories, shopping malls, computer rooms, and workshops. Because the matrix of WPC—plant fibers and thermoplastics—both have good electrical insulation properties but are poor conductors of electricity, the uniform dispersion of conductive fillers in the two phases greatly affects the actual antistatic properties of the composite material. The surface is highly susceptible to generating static electricity due to friction, and this charge cannot be easily dissipated. As the charge accumulates, it can lead to catastrophic consequences such as fires and explosions. Therefore, antistatic treatment is essential, leading to the development of antistatic flooring.
[0003] In the preparation of antistatic composite flooring materials, there are various antistatic methods. The purpose is to reduce the generation of static charge in the polymer synthetic material during use or to quickly dissipate the static charge once it is generated.
[0004] In response to the above technical solutions, the inventors have discovered that existing wood-plastic antistatic flooring materials are simply added, and the chemical structure of the wood matrix in the material contains only a small number of active groups, which is not conducive to the bonding of conductive particles outside the pores with it, resulting in poor conductivity and reduced antistatic effect. Summary of the Invention
[0005] To overcome the shortcomings of existing antistatic composite flooring with poor antistatic effect, this application provides an antistatic composite flooring and its preparation method, adopting the following technical solution:
[0006] In a first aspect, this application provides an antistatic composite flooring, which adopts the following technical solution:
[0007] An antistatic composite floor, comprising:
[0008] The flooring substrate includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer. The antistatic layer and the wood-plastic composite layer are co-extruded together. The antistatic layer comprises the following components by weight:
[0009] 3-5 parts antistatic agent;
[0010] PVC 45-65 parts;
[0011] Functional additives: 0.1-2.0 parts.
[0012] Through the above technical solution, this application adjusts the traditional multi-layer stacked structure of antistatic composite flooring to a three-layer co-extrusion process. On the one hand, the structure of the antistatic composite flooring prepared by three-layer co-extrusion is more compact and uniform, and the one-time molding technical solution has higher strength and durability than the traditional multi-layer stacking solution. On the other hand, due to the top and bottom covering structural design, compared with the traditional stacking structure, its integrated performance is better, the antistatic effect is more excellent, and it effectively improves the mechanical strength of the flooring material while further improving the antistatic performance of the antistatic composite flooring.
[0013] Furthermore, the antistatic layer also includes a wear-resistant modifier, and the antistatic agent and the wear-resistant modifier are compounded and molded using the following preparation scheme:
[0014] Take an antistatic ionic liquid, graphene, and coupling agent-ethanol solution, stir and mix them, and then ultrasonically disperse them. Collect the dispersion.
[0015] The composite modifier can be prepared by ball milling a mixture of wear-resistant modifier silicon carbide aerogel and dispersion.
[0016] Through the above technical solution, this application optimizes the antistatic layer by using antistatic ionic liquid and graphene as the main antistatic materials and loading them into silicon carbide aerogel. The silicon carbide aerogel effectively improves the problem of easy agglomeration of traditional antistatic agents added to the material. At the same time, as a filler skeleton, the silicon carbide aerogel can significantly improve the structural strength of the antistatic layer, improve its wear resistance and service life, thereby reducing the defect of reduced antistatic effect caused by friction of flooring materials during actual use, and further improving the wear resistance of flooring materials.
[0017] Furthermore, the wood-plastic layer comprises the following components by weight:
[0018] 45-50 parts PVC;
[0019] 10-25 parts wood flour;
[0020] 0.2-0.5 parts of coupling agent;
[0021] Heat stabilizer 1-3 parts;
[0022] 6-12 parts of antistatic agent;
[0023] 1-2.5 parts lubricant;
[0024] Alumina 0.1-1.5 parts;
[0025] The antistatic agent comprises dispersed and modified carbon black particles.
[0026] Furthermore, the dispersion-modified carbon black particles are prepared using the following method:
[0027] Take carbon black particles and mix them with a mixture of sulfuric acid and nitric acid. After ultrasonic dispersion, filter, wash, and air dry, grind and disperse to prepare the oxidized carbon black particles.
[0028] Through the above technical solution, this application optimizes the wood-plastic composite layer composition and uses the most common and cost-effective antistatic agent for treatment, reducing costs. Furthermore, this application performs surface oxidation modification treatment to improve the defects of poor carbon black dispersion and insufficient surface functional groups. By oxidizing the surface, the number of oxygen-containing functional groups on the carbon black particle surface is effectively increased, reducing the agglomeration between primary carbon black particles, improving the compatibility between carbon black particles and the polymer, and promoting more uniform dispersion of carbon black in the polymer, thus further improving the antistatic performance of the antistatic composite flooring.
[0029] Furthermore, the antistatic composite flooring also includes:
[0030] The finishing layer is disposed on one side of the floor substrate and is fixedly connected to the floor substrate by an adhesive.
[0031] A balancing pad is disposed on the other side of the floor substrate and is fixedly connected to the floor substrate by an adhesive.
[0032] Furthermore, the balancing pad layer has a plurality of raised structures on the side away from the finishing layer, and each of the raised structures is spaced apart on the surface of the balancing pad layer.
[0033] Furthermore, the protruding structure has multiple layers with rectangular interfaces, and the length of adjacent layers decreases progressively from one end closer to the floor substrate to the other end.
[0034] Through the above technical solutions, this application optimizes the composite structure of antistatic composite flooring. This application selects a balancing pad as the bottom layer and adjusts its structure. This application selects a superimposed raised structure. Due to the peak-valley design, the conduction of charge can be effectively transferred. This application effectively improves the antistatic performance of antistatic composite flooring by optimizing the balancing pad structure.
[0035] Furthermore, the balancing pad is made of polyurethane foam, and the 25% indentation hardness of the balancing pad is 40-67N.
[0036] Through the above technical solution, this application optimizes the structure of the balancing pad and ensures good cushioning effect while taking into account excellent structural performance through appropriate indentation hardness, thus guaranteeing its good antistatic effect.
[0037] Secondly, this application provides a method for preparing antistatic composite flooring, which adopts the following technical solution:
[0038] Take wood flour, PVC, and carbon black materials and dry them until the moisture content is less than 3%;
[0039] Wood-plastic composite material and antistatic material are placed in an extruder and co-extruded to obtain extruded board. The extruded board is then pressed and shaped to obtain floor substrate.
[0040] The antistatic composite flooring is prepared by assembling the balancing pad layer, adhesive layer, flooring substrate, adhesive layer and finishing layer from bottom to top, pressing them into shape and letting them stand.
[0041] Through the above technical solutions, this application improves the manufacturing process by using a three-layer co-extrusion technique to prepare the antistatic layer, and further improves the mechanical properties and antistatic durability of the antistatic composite flooring through an integrated molding technique.
[0042] Furthermore, the mass ratio of the raw materials of the antistatic layer to the wood-plastic layer is 1:12.5-14.
[0043] The beneficial effects that this application can produce include:
[0044] First, this application addresses the issue of the traditional multi-layered structure of antistatic composite flooring by adjusting it to a three-layer co-extrusion process. On one hand, the structure of the three-layer co-extruded antistatic composite flooring is more compact and uniform, and the one-time molding technology has higher strength and durability compared to the traditional multi-layered structure. On the other hand, due to the top and bottom covering structure design, it has better integrated performance and superior antistatic effect compared to the traditional stacked structure. This effectively improves the mechanical strength of the flooring material while further enhancing the antistatic performance of the antistatic composite flooring.
[0045] Secondly, this application optimizes the wood-plastic composite layer composition by using the most common and cost-effective antistatic agent to reduce costs. Furthermore, this application performs surface oxidation modification to improve the poor dispersion performance and low surface functional groups of carbon black. This oxidation treatment effectively increases the oxygen-containing functional groups on the carbon black particle surface, reduces the agglomeration of primary carbon black particles, improves the compatibility between carbon black particles and the polymer, and promotes more uniform dispersion of carbon black in the polymer, further improving the antistatic performance of the antistatic composite flooring.
[0046] Third, this application optimizes the composite structure of the antistatic composite floor by selecting a balancing pad as the bottom layer and adjusting its structure. This application also selects a superimposed raised structure. Due to the peak-valley design, the conduction of charge can be effectively transferred. This application effectively improves the antistatic performance of the antistatic composite floor by optimizing the balancing pad structure. Attached Figure Description
[0047] Figure 1 This is a cross-sectional view of the balancing pad layer in Examples 8-10 of the application. Detailed Implementation
[0048] To further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the scope of the claims.
[0049] There are no particular restrictions on the source of any raw materials used in this invention; they can be purchased from the market or prepared using conventional methods known to those skilled in the art.
[0050] There are no particular restrictions on the purity of any of the raw materials used in this invention. However, this invention preferably uses analytical grade or the purity requirements conventional in the field of polypropylene material preparation.
[0051] All raw materials of this invention are conventional in the field, and each brand name and abbreviation is clear and distinct in its relevant application. Those skilled in the art can purchase them from the market or prepare them by conventional methods based on the brand name, abbreviation and corresponding application.
[0052] Preparation Example 1
[0053] Take 4.5g of antistatic ionic liquid LQ-01 and 6g of graphene and add them to 100g of a mixture of 1% silane coupling agent KH-550 and anhydrous ethanol. Disperse the mixture by ultrasonication for 25min to obtain an antistatic agent.
[0054] Take 3 kg of antistatic agent, 45 kg of PVC, 0.05 kg of ACR resin and 0.05 kg of lubricant and stir to prepare antistatic layer raw material 1.
[0055] Preparation Example 2
[0056] Take 4.7g of antistatic ionic liquid LQ-01 and 8g of graphene and add them to 125g of a mixture of 1% silane coupling agent KH-550 and anhydrous ethanol. Disperse the mixture by ultrasonication for 25min to obtain an antistatic agent.
[0057] Take 4 kg of antistatic agent, 55 kg of PVC, 0.5 kg of ACR resin and 0.5 kg of lubricant and stir them together to prepare antistatic layer raw material 2.
[0058] Preparation Example 3
[0059] Take 5.0g of antistatic ionic liquid LQ-01 and 10g of graphene and add them to 150g of a mixture of 1% silane coupling agent KH-550 and anhydrous ethanol. Disperse the mixture by ultrasonication for 25min to obtain an antistatic agent.
[0060] Take 5 kg of antistatic agent, 65 kg of PVC, 1 kg of ACR resin and 1.0 kg of lubricant and mix them to prepare antistatic layer raw material 3.
[0061] Preparation Example 4
[0062] Take 4.7g of antistatic ionic liquid LQ-01 and 8g of graphene and add them to 125g of a mixture of 1% silane coupling agent KH-550 and anhydrous ethanol. After ultrasonic dispersion for 25min, take 40-50g of silicon carbide aerogel and ball mill for 2h. Collect the mixed slurry as an antistatic agent.
[0063] Take 4 kg of antistatic agent, 55 kg of PVC, 0.5 kg of ACR resin and 0.5 kg of lubricant and stir them together to prepare antistatic layer raw material 4.
[0064] Preparation Example 5
[0065] Take 500g of carbon black particles and mix them with a mixture of 2.5kg of 45% sulfuric acid and 2.5kg of 30% nitric acid. After ultrasonic dispersion at 200W, filter the mixture, wash it with deionized water until the washing solution is neutral, let it dry naturally, grind and disperse it through a 1000-mesh sieve, and prepare the oxidized carbon black particles as an antistatic agent.
[0066] Take 45kg of PVC resin, 10kg of wood flour, 0.2kg of coupling agent KH550, 1kg of heat stabilizer, 1kg of lubricant, 1.5kg of ACR resin and 0.1kg of alumina particles, and mix them in a high-speed mixer at a stirring rate of 3500r / min to prepare wood-plastic layer raw material 1.
[0067] Preparation Example 6
[0068] Take 500g of carbon black particles and mix them with a mixture of 2.5kg of 45% sulfuric acid and 2.5kg of 30% nitric acid. After ultrasonic dispersion at 200W, filter the mixture, wash it with deionized water until the washing solution is neutral, let it dry naturally, grind and disperse it through a 1000-mesh sieve, and prepare the oxidized carbon black particles as an antistatic agent.
[0069] Take 48kg of PVC resin, 17kg of wood flour, 0.3kg of coupling agent KH550, 2kg of heat stabilizer, 1.8kg of lubricant, 2kg of ACR resin and 0.8kg of alumina particles, and mix them in a high-speed mixer at a stirring rate of 3500r / min to prepare wood-plastic layer raw material 2.
[0070] Preparation Example 7
[0071] Take 500g of carbon black particles and mix them with a mixture of 2.5kg of 45% sulfuric acid and 2.5kg of 30% nitric acid. After ultrasonic dispersion at 200W, filter the mixture, wash it with deionized water until the washing solution is neutral, let it dry naturally, grind and disperse it through a 1000-mesh sieve, and prepare the oxidized carbon black particles as an antistatic agent.
[0072] Take 50kg of PVC resin, 25kg of wood flour, 0.5kg of coupling agent KH550, 3kg of heat stabilizer, 2.5kg of lubricant, 3.5kg of ACR resin and 1.5kg of alumina particles, and mix them in a high-speed mixer at a stirring rate of 3500r / min to prepare wood-plastic layer raw material 3.
[0073] Example 1
[0074] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0075] A method for preparing an antistatic composite floor includes the following steps:
[0076] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0077] The antistatic layer material 1 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0078] The wood-plastic composite material 1 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0079] By controlling the mass ratio of antistatic layer raw material 1 to wood-plastic layer raw material 1 to 1:12.5, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0080] Example 2
[0081] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0082] A method for preparing an antistatic composite floor includes the following steps:
[0083] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0084] The antistatic layer material 1 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0085] The wood-plastic composite material 1 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0086] By controlling the mass ratio of antistatic layer raw material 1 to wood-plastic layer raw material 1 to 1:13.2, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0087] Example 3
[0088] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0089] A method for preparing an antistatic composite floor includes the following steps:
[0090] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0091] The antistatic layer material 1 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0092] The wood-plastic composite material 1 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0093] By controlling the mass ratio of antistatic layer material 1 to wood-plastic layer material 1 to 1:14, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0094] Example 4
[0095] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0096] A method for preparing an antistatic composite floor includes the following steps:
[0097] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0098] The antistatic layer material 2 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min, and the barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0099] The wood-plastic composite material 2 was placed in a conical twin-screw extruder with the main machine speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0100] By controlling the mass ratio of antistatic layer material 2 to wood-plastic layer material 2 to 1:13.2, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0101] Example 5
[0102] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0103] A method for preparing an antistatic composite floor includes the following steps:
[0104] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0105] The antistatic layer material 3 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0106] The wood-plastic composite material 3 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0107] By controlling the mass ratio of antistatic layer material 3 to wood-plastic layer material 3 to 1:13.2, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0108] Example 6
[0109] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0110] A method for preparing an antistatic composite floor includes the following steps:
[0111] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0112] The antistatic layer material 4 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0113] The wood-plastic composite material 2 was placed in a conical twin-screw extruder with the main machine speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0114] By controlling the mass ratio of antistatic layer raw material 4 to wood-plastic layer raw material 2 to 1:13.2, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0115] Example 7
[0116] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0117] A method for preparing an antistatic composite floor includes the following steps:
[0118] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0119] The antistatic layer material 4 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0120] The wood-plastic composite material 3 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0121] By controlling the mass ratio of antistatic layer raw material 4 to wood-plastic layer raw material 3 to 1:13.2, connecting the co-extrusion die heads, co-extruding the three layers, and pressing and shaping, antistatic composite flooring can be prepared.
[0122] Example 8
[0123] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0124] A method for preparing an antistatic composite floor includes the following steps:
[0125] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0126] The antistatic layer material 4 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0127] The wood-plastic composite material 2 was placed in a conical twin-screw extruder with the main machine speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0128] The mass ratio of antistatic layer raw material 4 to wood-plastic layer raw material 2 is controlled at 1:13.2. The co-extrusion die heads are connected, and the three layers are co-extruded. After pressing and shaping, the floor substrate is prepared.
[0129] Take another polyurethane foam and adjust its structure as follows: Figure 1 As shown, a number of raised structures are provided on one side of the balancing pad layer. Each raised structure is spaced apart on the surface of the balancing pad layer. The raised structure has multiple layers with rectangular interfaces. The length of adjacent layers decreases from one end near the floor substrate to the other end. The 25% indentation hardness of the polyurethane foam balancing pad layer is set to 40N.
[0130] Take 15g TPU powder, 3g dodecyltrimethylammonium chloride, 5g conductive carbon black and 75g anhydrous ethanol, stir and mix, ultrasonically disperse and collect the dispersion, impregnate the polyurethane foam material foamed according to the mold into the dispersion, dry at 100℃ for 25min to prepare the balanced pad.
[0131] Then, from bottom to top, the components are assembled as a balance pad layer, an adhesive layer, a floor substrate, an adhesive layer, and a finishing layer, respectively. After being pressed and molded, they are left to stand to obtain the antistatic composite floor.
[0132] Example 9
[0133] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0134] A method for preparing an antistatic composite floor includes the following steps:
[0135] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0136] The antistatic layer material 4 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0137] The wood-plastic composite material 3 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0138] The mass ratio of antistatic layer raw material 4 to wood-plastic layer raw material 3 is controlled at 1:13.2. The co-extrusion die heads are connected, and the three layers are co-extruded. After pressing and shaping, the floor substrate is prepared.
[0139] Take another polyurethane foam and adjust its structure as follows: Figure 1 As shown, a number of raised structures are provided on one side of the balancing pad layer. Each raised structure is spaced apart on the surface of the balancing pad layer. The raised structure has multiple layers with rectangular interfaces. The length of adjacent layers decreases from one end near the floor substrate to the other end. The 25% indentation hardness of the polyurethane foam balancing pad layer is set to 52N.
[0140] Take 22g TPU powder, 6g dodecyltrimethylammonium chloride, 12g conductive carbon black and 82g anhydrous ethanol, stir and mix, ultrasonically disperse and collect the dispersion, impregnate the polyurethane foam material foamed according to the mold into the dispersion, dry at 100℃ for 25min to prepare the balanced pad.
[0141] Then, from bottom to top, the components are assembled as a balance pad layer, an adhesive layer, a floor substrate, an adhesive layer, and a finishing layer, respectively. After being pressed and molded, they are left to stand to obtain the antistatic composite floor.
[0142] Example 10
[0143] An antistatic composite flooring includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer, wherein the antistatic layer and the wood-plastic composite layer are co-extruded together.
[0144] A method for preparing an antistatic composite floor includes the following steps:
[0145] The wood flour, PVC resin, and carbon black materials in the wood-plastic composite material are dried until the moisture content is less than 3%.
[0146] The antistatic layer material 4 was placed in a single screw extruder, and the main machine speed was controlled at 8.8 r / min. The barrel temperature was set to 170, 185, 190, 200, and 210℃.
[0147] The wood-plastic composite material 3 was placed in a conical twin-screw extruder with the main extruder speed at 4.8 r / min and the barrel temperature set to 195, 185, 185, 195, 195, 200℃.
[0148] The mass ratio of antistatic layer raw material 4 to wood-plastic layer raw material 3 is controlled at 1:13.2. The co-extrusion die heads are connected, and the three layers are co-extruded. After pressing and shaping, the floor substrate is prepared.
[0149] Take another polyurethane foam and adjust its structure as follows: Figure 1 As shown, a number of raised structures are provided on one side of the balancing pad layer. Each raised structure is spaced apart on the surface of the balancing pad layer. The raised structure has multiple layers with rectangular interfaces. The length of adjacent layers decreases from one end near the floor substrate to the other end. The 25% indentation hardness of the polyurethane foam balancing pad layer is set to 67N.
[0150] Take 30g TPU powder, 10g dodecyltrimethylammonium chloride, 18g conductive carbon black and 100g anhydrous ethanol, stir and mix, ultrasonically disperse and collect the dispersion, impregnate the polyurethane foam material foamed according to the mold into the dispersion, dry at 100℃ for 25min to prepare the balance pad.
[0151] Then, from bottom to top, the components are assembled as a balance pad layer, an adhesive layer, a floor substrate, an adhesive layer, and a finishing layer, respectively. After being pressed and molded, they are left to stand to obtain the antistatic composite floor.
[0152] Performance testing
[0153] The antistatic composite flooring prepared according to the technical solutions of Examples 1-10 was characterized in terms of performance. The specific characterization schemes were based on the following standards:
[0154] According to the standard GB / T1410-2006, the volume resistivity of each sample was tested using a volume surface resistivity meter. The sample size was 100×100mm×4mm. The specific test structure is shown in Table 1 below:
[0155] Table 1 Performance Test Table
[0156]
[0157] Based on the data in Table 1 and in conjunction with Examples 1-5, it can be seen that this application adjusts the traditional multi-layer stacked structure of antistatic composite flooring to a three-layer co-extrusion process. On the one hand, the structure of the antistatic composite flooring prepared by three-layer co-extrusion is more compact and uniform, and the one-time molding technology has higher strength and durability compared to the traditional multi-layer stacked solution. On the other hand, due to the top and bottom covering structure design, compared with the traditional stacked structure, its integrated performance is better, the antistatic effect is more excellent, and it effectively improves the mechanical strength of the flooring material while further improving the antistatic performance of the antistatic composite flooring.
[0158] Secondly, by comparing the technical solutions of Examples 1-5 and Examples 6-7, it can be explained that the technical solution of this application optimizes the antistatic layer by loading antistatic ionic liquid and graphene as the main antistatic materials into silicon carbide aerogel. The silicon carbide aerogel effectively improves the problem of easy agglomeration of traditional antistatic agents added to the material. At the same time, as a filler skeleton, the silicon carbide aerogel can significantly improve the structural strength of the antistatic layer, improve its wear resistance and service life, thereby reducing the defect of reduced antistatic effect caused by friction of flooring materials in actual use, and further improving the wear resistance of flooring materials.
[0159] Finally, considering the technical solutions of Examples 1-5, 6-7, and 8-10, this application optimizes the composite structure of the antistatic composite floor, selects a balancing pad as the bottom layer and adjusts its structure, and uses a superimposed raised structure. Due to the peak-valley design, the conduction of charge can be effectively transferred. By optimizing the balancing pad structure, this application effectively improves the antistatic performance of the antistatic composite floor.
[0160] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.
Claims
1. An antistatic composite floor, characterized in that, The flooring substrate includes a wood-plastic composite layer and an antistatic layer covering both sides of the wood-plastic composite layer. The antistatic layer and the wood-plastic composite layer are co-extruded together. The antistatic layer comprises the following components by weight: 3-5 parts antistatic agent; PVC 45-65 parts; Functional additives 0.1-2.0 parts; the antistatic layer also includes a wear-resistant modifier, and the antistatic agent and the wear-resistant modifier are compounded and molded using the following preparation scheme: Take an antistatic ionic liquid, graphene, and coupling agent-ethanol solution, stir and mix them, and then ultrasonically disperse them. Collect the dispersion. The composite modifier can be prepared by ball milling a mixture of wear-resistant modifier silicon carbide aerogel and dispersion.
2. The antistatic composite flooring according to claim 1, characterized in that, The wood-plastic layer comprises the following components by weight: PVC 45-50 parts; 10-25 parts wood flour; 0.2-0.5 parts of coupling agent; Heat stabilizer 1-3 parts; 6-12 parts of antistatic agent; 1-2.5 parts lubricant; Alumina 0.1-1.5 parts; The antistatic agent comprises dispersed and modified carbon black particles.
3. The antistatic composite flooring according to claim 2, characterized in that, The dispersion-modified carbon black particles are prepared using the following method: Carbon black granules are mixed with a mixture of sulfuric acid and nitric acid, ultrasonically dispersed, filtered, washed, naturally dried, and then ground and dispersed to prepare oxidized carbon black granules.
4. The antistatic composite flooring according to claim 1, characterized in that, The antistatic composite floor also includes: The finishing layer is disposed on one side of the floor substrate and is fixedly connected to the floor substrate by an adhesive. A balancing pad is disposed on the other side of the floor substrate and is fixedly connected to the floor substrate by an adhesive.
5. The antistatic composite flooring according to claim 4, characterized in that, The balancing pad layer has a plurality of raised structures on the side away from the finishing layer, and each of the raised structures is spaced apart on the surface of the balancing pad layer.
6. The antistatic composite flooring according to claim 5, characterized in that, The raised structure has multiple rectangular layers, and the length of adjacent layers decreases from one end closer to the floor substrate to the other.
7. The antistatic composite flooring according to claim 4, characterized in that, The balancing pad is made of polyurethane foam, and the 25% indentation hardness of the balancing pad is 40-67N.
8. The method for preparing an antistatic composite floor according to claim 2, characterized in that, The preparation steps include the following: Take wood flour, PVC, and carbon black materials and dry them until the moisture content is less than 3%; Wood-plastic composite material and antistatic material are placed in an extruder and co-extruded to obtain extruded board. The extruded board is then pressed and shaped to obtain floor substrate. The antistatic composite flooring is prepared by assembling the balancing pad layer, adhesive layer, flooring substrate, adhesive layer and finishing layer from bottom to top, pressing them into shape and letting them stand.
9. The method for preparing an antistatic composite floor according to claim 8, characterized in that, The mass ratio of the raw materials of the antistatic layer to the wood-plastic layer is 1:12.5-14.