A high-strength, highly wear-resistant, and corrosion-resistant plate, its preparation process and application

Abstract

The present invention provides a high-strength, high-wear-resistant, and corrosion-proof board, its preparation process and application, including: a substrate and a lining board embedded inside the substrate. The substrate includes a composite plate body, and several composite plate bodies are spliced together to form a spliced floor. The high-strength, high-wear-resistant, and corrosion-proof board, its preparation process and application provided by the present invention, through innovative designs such as an integrated co-extrusion process, a seamless splicing design, and an uneven structure of the metal plate body, when applied to spliced plates, can be used for floor paving or wall decoration, etc., achieving excellent properties such as high strength, high wear resistance, and corrosion prevention, and having the advantages of easy installation, easy maintenance, and beauty. It solves the problem that the substrate and the lining board are easily separated due to thermal expansion and contraction, and at the same time makes up for the deficiencies in aspects such as the self-structural strength, load-bearing capacity, and compressive and anti-deformation capabilities of traditional wood-plastic floors, as well as the common problems of thermal expansion and contraction and easy fracture.

Description

Technical Field

[0001] The present invention relates to the technical field of building fittings, and specifically relates to a high-strength, high-wear-resistant, and corrosion-resistant board, its preparation process and application. Background Art

[0002] With the development of society, the use of splicing floors is becoming more and more widespread, and their types are also diverse. Splicing floors are used in factory buildings, outdoor temporary paving, outdoor balcony paving, etc. However, most of the existing splicing floors have certain connection gaps during splicing, and seamless splicing cannot be achieved, thus affecting their splicing effect. Dust and garbage are likely to accumulate in the connection gaps, and even large connection gaps are likely to cause people to trip, which is very inconvenient.

[0003] Moreover, traditional wood-plastic floors still have certain deficiencies in terms of their own structural strength, bearing capacity, compressive and anti-deformation abilities, etc. At the same time, they also have common problems such as thermal expansion and contraction and being relatively easy to break.

[0004] Therefore, a high-strength, high-wear-resistant, and corrosion-resistant board, its preparation process and application are proposed. Summary of the Invention

[0005] The present invention aims to solve the problems raised in the background art, and provides a high-strength, high-wear-resistant, and corrosion-resistant board, its preparation process and application.

[0006] The specific technical solutions are as follows:

[0007] A high-strength, high-wear-resistant, and corrosion-resistant board, comprising:

[0008] A base plate and a lining plate embedded inside the base plate, wherein:

[0009] The base plate includes a composite plate body, and a plurality of the composite plate bodies are spliced with each other to form a splicing floor;

[0010] The lining plate includes a metal plate body, and the metal plate body forms an integral structure with the composite plate body through a co-extrusion process;

[0011] Through holes are formed on the surface of the metal plate body.

[0012] A long strip-shaped card slot penetrating through both ends thereof is reserved on one side of the composite plate body, and a long strip-shaped convex strip protruding outward is reserved on the other side of the composite plate body. The long strip-shaped convex strip can be press-fitted into the long strip-shaped card slot, and seamless splicing between adjacent composite plate bodies is achieved by the long strip-shaped convex strip being inserted into the long strip-shaped card slot;

[0013] The metal plate body extends along the direction of the long strip-shaped card slot to form a structure with alternating concave and convex parts. The formed concave parts and convex parts are respectively close to the upper and lower surfaces of the composite plate body, and the formed concave parts and convex parts do not protrude from the upper and lower surfaces of the composite plate body.

[0014] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: the composite plate body uniformly reserves a plurality of through slots along the direction of the long strip-shaped card slot, and the plurality of through slots are staggered between adjacent concave parts and convex parts.

[0015] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: the plurality of through slots are all circular, oval, trapezoidal or square.

[0016] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: a plurality of uniformly arranged separation slots are reserved at the bottom of the composite plate body, and the length direction of the separation slots is the same as the length direction of the long strip-shaped card slot.

[0017] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: the cross-sections of the concave parts and the convex parts perpendicular to the length direction of the long strip-shaped card slot are both trapezoidal, and through holes are opened on the bottom wall and side walls of the concave parts and on the top wall and side walls of the convex parts.

[0018] The plurality of through holes are circular, oval, trapezoidal or square.

[0019] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: the metal plate body is an aluminum alloy plate body, and the thickness of the metal plate body is not less than 1 mm.

[0020] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: the composite plate body is a wood-plastic composite plate body, and the thickness of the composite plate body is not less than 4 cm.

[0021] The above-mentioned high-strength, high-wear-resistant, and corrosion-resistant plate, wherein: the upper surface of the composite plate body is covered with a wrapping layer by a co-extrusion process, the wrapping layer is an ASA resin material layer; the raw material used for the ASA resin material layer is Chi Mei ASA resin PW-997S.

[0022] The present invention also provides a composite board, which comprises the following raw materials in parts by weight:

[0023] 18 - 20 parts of corn straw with a particle size of 100 - 200 mesh, 8 - 12 parts of wood powder with a particle size of 400 - 500 mesh, 54 - 60 parts of modified polypropylene, 12 - 17 parts of ethylene - vinyl acetate copolymer, 0.6 - 0.9 parts of silane coupling agent, 1 - 4 parts of modified filler, 1 - 3 parts of calcium stearate, 0.2 - 0.5 parts of antibacterial agent (such as silver ion antibacterial agent, purchased from Nanjing Tianshi Blue Shield Biotechnology Co., Ltd., model: silver ion antibacterial agent - LD904), and 0.1 - 0.3 parts of antioxidant (such as Irganox1010, BASF).

[0024] The preparation method of modified polypropylene includes the following steps:

[0025] (1) Mix 1 part by weight of graphene oxide and 100 - 150 parts by weight of deionized water, disperse by ultrasonic wave, then continue to add 0.2 - 0.4 parts by weight of silane coupling agent KH560, mix evenly, heat up to 70 - 75 °C, stir and react for 2 - 3 h, continue to add 0.1 - 0.2 parts by weight of hydrazine hydrate and 1 - 1.5 parts by weight of ammonia water, carry out reduction reaction under stirring for 2 - 4 h, filter by suction and dry to obtain silane - modified reduced graphene oxide;

[0026] (2) Dissolve 22 - 27 parts by weight of polypropylene in 100 - 120 parts by weight of xylene at 130 - 135 °C, then continue to add 1 - 3 parts by weight of silane - modified reduced graphene oxide, stir and react for 5 - 8 h under heat - preservation conditions, and dry under vacuum to obtain modified polypropylene.

[0027] Polypropylene can be purchased from Formosa Plastics Industries (Ningbo) Co., Ltd.; model 1450T.

[0028] Coriolus versicolor is a white - rot fungus. This kind of fungus can decompose cellulose, hemicellulose and lignin in wood, and Coriolus versicolor will cause the strength of the board to decline. In the prior art, graphene is usually added to the raw materials of wood - plastic floors to improve antibacterial properties, but the dispersion of graphene is uneven, resulting in poor antibacterial and corrosion - resistant effects. In the present invention, by modifying polypropylene, the anti - corrosion property of the board can be improved. At the same time, the compatibility of the modified polypropylene with other raw materials is better. However, under this condition, the waterproof performance of the board is poor.

[0029] The ethylene-vinyl acetate copolymer comprises ethylene-vinyl acetate copolymer A, ethylene-vinyl acetate copolymer B and ethylene-vinyl acetate copolymer C in a weight ratio of 1:(1.2 - 1.4):(0.5 - 0.8). The melt index of ethylene-vinyl acetate copolymer A is 7.5 g / 10 min, and the mass percentage of vinyl acetate units is 26%; the melt index of ethylene-vinyl acetate copolymer B is 25 g / 10 min, and the mass percentage of vinyl acetate units is 28%; the melt index of ethylene-vinyl acetate copolymer C is 150 g / 10 min, and the mass percentage of vinyl acetate units is 19%. All are purchased from Formosa Plastics Industry (Ningbo) Co., Ltd.; the models are 7470M, 7760H, and 7A50H.

[0030] Waterproofness is an important property of the board. The waterproofness of the board modified with polypropylene is not ideal. In the present invention, by adding an ethylene-vinyl acetate copolymer to the raw material containing modified polypropylene, the waterproof performance of the board can be improved. By adding the ethylene-vinyl acetate copolymer, a denser network structure can be formed with other components in the system, improving the waterproofness. At the same time, when the ethylene-vinyl acetate copolymer is mixed with three different ethylene-vinyl acetate copolymers with specific ratios, the boiling water resistance of the board can be improved.

[0031] The modification of the filler comprises the following steps:

[0032] (1) Mix titanium dioxide, lanthanum oxide and silicon dioxide in a weight ratio of (1.2 - 1.5):1:(0.3 - 0.6) to obtain a mixed filler;

[0033] (2) Mix the mixed filler, silane coupling agent KH560, ethanol and deionized water in a weight ratio of 1:(0.1 - 0.3):(20 - 25):(35 - 40), heat and stir at 80 - 85 °C for 3 - 5 h, cool, filter and wash to obtain a silane-modified mixed filler;

[0034] (3) Mix the silane-modified mixed filler, nano-poly(tetrafluoroethylene), polyvinylpyrrolidone and an ethanol aqueous solution with a weight percentage of 40 - 50% in a weight ratio of 1:(10 - 15):(0.1 - 0.4):(60 - 80), disperse evenly, and then perform spray drying to obtain the modified filler.

[0035] The particle size of the titanium dioxide is 10 - 20 nm and the specific surface area is 30 - 100 m 2 / g; the particle size of the lanthanum oxide is 30 - 50 nm and the specific surface area is 20 - 40 m 2 / g; the particle size of the silicon dioxide is 10 - 20 nm and the specific surface area is 200 - 250 m 2 / g.

[0036] The present invention also provides a preparation process for a high-strength, highly wear-resistant, and corrosion-resistant plate, comprising the following steps:

[0037] S1: Prepare the raw materials for the composite plate body (101), including the following raw materials in parts by weight:

[0038] 18 - 20 parts of corn straw with a particle size of 100 - 200 mesh, 8 - 12 parts of wood powder with a particle size of 400 - 500 mesh, 54 - 60 parts of modified polypropylene, 12 - 17 parts of ethylene-vinyl acetate copolymer, 0.6 - 0.9 parts of silane coupling agent, 1 - 4 parts of modified filler, 1 - 3 parts of calcium stearate, 0.2 - 0.5 parts of antibacterial agent (such as silver ion antibacterial agent, purchased from Nanjing Tianshi Blue Shield Biotechnology Co., Ltd., model: silver ion antibacterial agent - LD904), and 0.1 - 0.3 parts of antioxidant (such as Irganox1010, BASF).

[0039] The preparation method of the modified polypropylene comprises the following steps:

[0040] (1) Mix 1 part by weight of graphene oxide and 100 - 150 parts by weight of deionized water, disperse by ultrasonic wave, then continue to add 0.2 - 0.4 parts by weight of silane coupling agent KH560, mix evenly, heat up to 70 - 75 °C, stir and react for 2 - 3 h, continue to add 0.1 - 0.2 parts by weight of hydrazine hydrate and 1 - 1.5 parts by weight of ammonia water, carry out reduction reaction under stirring for 2 - 4 h, filter by suction and dry to obtain silane-modified reduced graphene oxide;

[0041] (2) Dissolve 22 - 27 parts by weight of polypropylene in 100 - 120 parts by weight of xylene at 130 - 135 °C, then continue to add 1 - 3 parts by weight of silane-modified reduced graphene oxide, stir and react for 5 - 8 h under heat preservation conditions, and dry in vacuum to obtain modified polypropylene.

[0042] The polypropylene can be purchased from Formosa Plastics Industry (Ningbo) Co., Ltd.; model 1450T.

[0043] The ethylene-vinyl acetate copolymer comprises ethylene-vinyl acetate copolymer A, ethylene-vinyl acetate copolymer B, and ethylene-vinyl acetate copolymer C with a weight ratio of 1:(1.2 - 1.4):(0.5 - 0.8). The melt index of ethylene-vinyl acetate copolymer A is 7.5 g / 10 min, and the mass percentage of vinyl acetate units is 26%; the melt index of ethylene-vinyl acetate copolymer A is 25 g / 10 min, and the mass percentage of vinyl acetate units is 28%; the melt index of ethylene-vinyl acetate copolymer A is 150 g / 10 min, and the mass percentage of vinyl acetate units is 19%. All are purchased from Formosa Plastics Industry (Ningbo) Co., Ltd.; models 7470M, 7760H, 7A50H.

[0044] The modification of the filler comprises the following steps:

[0045] (1) Mix titanium dioxide, lanthanum oxide and silicon dioxide with a weight ratio of (1.2 - 1.5):1:(0.3 - 0.6) to obtain a mixed filler;

[0046] (2) Mix the mixed filler, silane coupling agent KH560, ethanol and deionized water with a weight ratio of 1:(0.1 - 0.3):(20 - 25):(35 - 40), heat and stir at 80 - 85 °C for 3 - 5 h, cool, filter and wash to obtain a silane-modified mixed filler;

[0047] (3) Mix the silane-modified mixed filler, nano-poly(tetrafluoroethylene), polyvinylpyrrolidone and an ethanol aqueous solution with a weight percentage of 40 - 50% with a weight ratio of 1:(10 - 15):(0.1 - 0.4):(60 - 80). After dispersing evenly, perform spray drying to obtain a modified filler.

[0048] The titanium dioxide has a particle size of 10 - 20 nm and a specific surface area of 30 - 100 m 2 / g; the lanthanum oxide has a particle size of 30 - 50 nm and a specific surface area of 20 - 40 m 2 / g; the silicon dioxide has a particle size of 10 - 20 nm and a specific surface area of 200 - 250 m 2 / g.

[0049] The high-wear-resistant composite plate body is connected and combined with the metal plate for use, which can improve the overall durability and aesthetics of the floor, and also enhance the structural stability and installation convenience of the floor, and is more suitable for application scenarios requiring higher strength and longer life. The present invention attempts to add a filler to improve the wear resistance of the composite plate body, but the effect is not ideal. However, the compatibility of the filler with other components in the system is poor. The present invention modifies the filler to improve the wear resistance of the plate. The modified filler has better compatibility and higher dispersibility with other components in the system, forms a denser structure, and can improve the wear resistance of the plate.

[0050] S2: Prepare the raw material of the metal plate body, that is, prepare a long-strip aluminum alloy plate body having a recessed part, a protruding part and a through hole;

[0051] S3: Design a forming mold. The interior of the forming mold has a composite plate body forming cavity, and a cover plate is detachably installed at one end of the forming mold. The cover plate is used to block one end of the composite plate body forming cavity, and the cover plate has a slot for inserting the long-strip aluminum alloy plate body. A feeding pipe is fixedly installed on the outer wall of the forming mold through a plurality of uniformly arranged connecting pipes. The feeding pipe is connected to the interior of the composite plate body forming cavity through the plurality of connecting pipes, and a flange connected to its interior is fixedly installed on the feeding pipe;

[0052] S4: Assemble the forming die and the extruder, and fixedly connect the flange to the extrusion head of the extruder through bolts;

[0053] S5: Use a mixer to mix the raw materials of the composite plate body (101) in step S1 evenly, and then melt and blend the evenly mixed raw materials through a twin-screw extruder, and granulate to obtain wood-plastic composite pellets;

[0054] S6: After adding the wood-plastic composite pellets prepared in step S5 into the extruder in step S4 and heating and melting them to an appropriate temperature, insert one end of the long-strip aluminum alloy plate body into the composite plate forming cavity inside the forming die through the slot, and then use the extruder to squeeze the molten raw materials into the feeding pipe and then enter the composite plate forming cavity inside the forming die through a number of uniformly arranged connecting pipes;

[0055] S7: After the raw materials in the composite plate forming cavity are formed, remove the cover plate, and then take out the formed wood-plastic composite plate body together with the long-strip aluminum alloy plate body, and perform rapid cooling and shaping through a cooling device to keep its shape and size stable;

[0056] S8: Subsequent processing: Perform subsequent processing such as cutting and trimming according to needs to obtain a finished high-strength, high-wear-resistant, and corrosion-resistant plate;

[0057] S9: Inspection and packaging: Conduct quality inspection on the finished product, including appearance, size, and mechanical property indexes, and perform packaging and warehousing after passing the inspection.

[0058] The present invention also provides an application of a high-strength, high-wear-resistant, and corrosion-resistant plate, which is applied to splicing plates and can be used for flooring or wall decoration, etc.

[0059] The present invention has the following beneficial effects:

[0060] The high-strength, high-wear-resistant, and corrosion-resistant plate, its preparation process and application provided by the present invention realize excellent properties such as high strength, high wear resistance, and corrosion resistance through innovative designs such as an integrated co-extrusion process, a seamless splicing design, and an uneven structure of the metal plate body, and have the advantages of easy installation, easy maintenance, and beauty. It can solve the problems that dust and garbage are easily accumulated in the connection gaps of traditional wood-plastic floors, and even people may trip over the too large connection gaps, which is very inconvenient. At the same time, it makes up for the deficiencies in the aspects of the structural strength, bearing capacity, compressive and anti-deformation ability, etc. of traditional wood-plastic floors, as well as the common problems of thermal expansion and contraction and easy fracture.

[0061] The present invention provides through holes on a metal plate body. When the composite plate body is extruded and formed, part of the material can be embedded in the through holes provided on the metal plate body and formed. When the plate material undergoes thermal expansion and contraction, the base plate and the lining plate will also be firmly connected and will not separate, solving the problem that the base plate and the lining plate are easily separated due to thermal expansion and contraction. Specifically, the present invention provides through holes on the metal plate body. When the composite plate body is extruded and formed, part of the raw materials can be embedded in the through holes provided on the metal plate body and formed. On the one hand, it helps to reduce the weight of the metal plate body. On the other hand, when the composite plate body undergoes thermal expansion and contraction deformation under temperature changes, the plate body material corresponding to the through hole part will be embedded in the through hole, making the composite plate body and the metal plate body fit more tightly, solving the problem that the base plate and the lining plate are easily separated due to thermal expansion and contraction, which is a major breakthrough in the industry and fills the industry gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 is a schematic structural view of the high-strength, high-wear-resistant, and corrosion-resistant plate provided in Embodiment 1 of the present invention Figure 1 ;

[0063] Figure 2 is a schematic structural view of the high-strength, high-wear-resistant, and corrosion-resistant plate provided in Embodiment 1 of the present invention Figure 2 ;

[0064] Figure 3 is a schematic semi-sectional structural view of the high-strength, high-wear-resistant, and corrosion-resistant plate provided in Embodiment 1 of the present invention;

[0065] Figure 4 is a schematic exploded structural view of the high-strength, high-wear-resistant, and corrosion-resistant plate provided in Embodiment 1 of the present invention;

[0066] Figure 5 is a schematic structural view of the high-strength, high-wear-resistant, and corrosion-resistant plate provided in Embodiment 1 of the present invention Figure 3 ;

[0067] Figure 6 is a schematic structural view of the combination of the forming die and the metal plate body provided in Embodiment 2 of the present invention;

[0068] Figure 7 is a schematic structural view of the decomposition of the forming die and the metal plate body provided in Embodiment 2 of the present invention;

[0069] Figure 8 is a schematic structural view of the high-strength, high-wear-resistant, and corrosion-resistant plate provided in Embodiment 3 of the present invention;

[0070] Figure 9 is a schematic view of the test product of the high-strength, high-wear-resistant, and corrosion-resistant plate provided by the present invention Figure 1 ;

[0071] Figure 10 Schematic diagram of the test product of the high-strength, high-wear-resistant and corrosion-resistant plate provided by the present invention Figure 2 .

[0072] Reference numerals:

[0073] 1. Substrate; 101. Composite plate body; 102. Long strip-shaped card slot; 103. Long strip-shaped rib; 104. Through groove; 105. Partition groove;

[0074] 2. Lining plate; 201. Metal plate body; 202. Depression; 203. Protrusion; 204. Through hole;

[0075] 3. Wrapping layer;

[0076] 4. Molding die; 401. Connecting pipe; 402. Feeding pipe; 403. Flange; 404. Cover plate; 405. Slot;

[0077] 5. Solid substrate; 501. Trapezoidal groove. Specific implementation mode

[0078] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific implementation modes.

[0079] Example 1

[0080] The high-strength, high-wear-resistant and corrosion-resistant plate provided in this example, as Figures 1 - 5 shown, includes: a substrate 1 and a lining plate 2 embedded inside the substrate 1, wherein:

[0081] The substrate 1 includes a composite plate body 101, and several composite plate bodies 101 are spliced with each other to form a spliced floor;

[0082] The lining plate 2 includes a metal plate body 201, and the metal plate body 201 forms an integral structure with the composite plate body 101 through a co-extrusion process;

[0083] A long strip-shaped card slot 102 penetrating through both ends is reserved on one side of the composite plate body 101, and a protruding long strip-shaped rib 103 is reserved on the other side of the composite plate body 101. The long strip-shaped rib 103 can be clamped into the long strip-shaped card slot 102 through interference fit, and seamless splicing between adjacent composite plate bodies 101 is achieved by clamping the long strip-shaped rib 103 into the long strip-shaped card slot 102;

[0084] The metal plate body 201 extends along the direction of the long strip-shaped card slot 102 to form a concave-convex alternating structure, and the formed depression 202 and protrusion 203 are respectively close to the upper and lower surfaces of the composite plate body 101, and the formed depression 202 and protrusion 203 do not protrude from the upper and lower surfaces of the composite plate body 101.

[0085] The high-strength, highly wear-resistant, and corrosion-resistant board adopting the above technical solutions is as follows:

[0086] Integrated co-extrusion process:

[0087] The composite board body 101 and the metal board body 201 form an integral structure through the co-extrusion process. This process enables them to be closely combined, avoiding the delamination or peeling problems that may be caused by traditional adhesives, thereby improving the overall strength and durability.

[0088] Seamless splicing design:

[0089] The design of the long strip-shaped card slots 102 and long strip-shaped ridges 103 reserved on the composite board body 101 enables seamless splicing between adjacent composite board bodies through interference fit. This design not only simplifies the installation process but also improves the overall flatness and stability of the floor.

[0090] The concave-convex alternating structure of the metal board body:

[0091] The metal board body 201 extends along the direction of the long strip-shaped card slot 102 in a concave-convex alternating structure. This design increases the surface area of the metal board body without affecting the surface flatness of the composite board body, thereby improving the bonding strength with the composite board body. At the same time, this structure also helps to disperse stress and improve the overall anti-deformation ability.

[0092] Easy installation and maintenance:

[0093] The seamless splicing design makes the installation process more simple and fast, reducing the installation time and cost. At the same time, due to the tight combination between the board bodies, it is not easy to generate gaps and looseness, reducing the maintenance difficulty and cost.

[0094] Aesthetic property:

[0095] Although the concave-convex alternating structure of the metal board body does not protrude from the surface of the composite board body, it can increase the three-dimensional sense and layering of the board body to a certain extent, enhancing the overall aesthetic property. At the same time, the seamless splicing design also ensures the flatness and consistency of the floor surface.

[0096] In summary, through innovative designs such as the integrated co-extrusion process, seamless splicing design, and concave-convex alternating structure of the metal board body, this high-strength, highly wear-resistant, and corrosion-resistant board achieves excellent properties such as high strength, high wear resistance, and corrosion resistance, and has the advantages of easy installation, easy maintenance, and good aesthetics. It can solve the problems that dust and garbage are easily accumulated in the connection gaps of traditional wood-plastic floors, and even people may be tripped due to overly large connection gaps, which is very inconvenient. At the same time, it compensates for the deficiencies in aspects such as the structural strength, bearing capacity, and compressive and anti-deformation abilities of traditional wood-plastic floors, as well as the common problems of thermal expansion and contraction and easy fracture.

[0097] Specifically, in this embodiment, in order to save the material cost of the composite plate body 101, a number of through grooves 104 are uniformly reserved along the direction of the long strip-shaped card slot 102. The number of through grooves 104 is staggered between adjacent concave portions 202 and convex portions 203. In addition, the staggered arrangement of the number of through grooves 104 helps to enhance the flexibility of the composite plate body 101, and at the same time reduces the overall weight without reducing the strength.

[0098] Specifically, in this embodiment, a number of through grooves 104 are all circular, elliptical, trapezoidal or square. Through grooves with shapes such as circular, elliptical, trapezoidal or square can be optimally selected according to specific application requirements to achieve the best effect.

[0099] Specifically, in this embodiment, a number of uniformly arranged partition grooves 105 are reserved at the bottom of the composite plate body 101. The length direction of the partition grooves 105 is the same as the length direction of the long strip-shaped card slot 102. The provided partition grooves 105 can further enhance the structural stability of the composite plate body 101 and reduce deformation caused by temperature changes or stress concentration. Its length direction is the same as that of the long strip-shaped card slot 102, which helps to maintain the overall flatness and strength of the floor.

[0100] Specifically, in this embodiment, the cross-sections of the concave portion 202 and the convex portion 203 perpendicular to the length direction of the long strip-shaped card slot 102 are both trapezoidal. Through holes 204 are provided on the bottom wall and side walls of the concave portion 202, and on the top wall and side walls of the convex portion 203. The trapezoidal cross-section design increases the contact area between the metal plate body 201 and the composite plate body 101 and improves the bonding strength.

[0101] As one of the core innovation points of the present invention, the through holes 204 are provided on the metal plate body 201. On the one hand, it helps to reduce the weight of the metal plate body. On the other hand, when the composite plate body undergoes thermal expansion and contraction deformation under temperature changes, the plate body material corresponding to the through hole 204 part will be embedded in the through hole 204, making the composite plate body 101 and the metal plate body 201 fit more tightly, solving the problem that the composite plate body 101 and the metal plate body 201 are separated from each other due to thermal expansion and contraction in the existing problems, which is a major breakthrough in the industry and fills the industry gap.

[0102] Specifically, in this embodiment, the metal plate body 201 is an aluminum alloy plate body, and the thickness of the metal plate body 201 is not less than 1 mm. Selecting aluminum alloy as the material of the metal plate body 201 is not only because it has high strength and corrosion resistance, but also because it has good machinability and recyclability. The design with a thickness not less than 1 mm ensures that the metal plate body can provide sufficient support and protection, and at the same time is not too heavy.

[0103] Specifically, in this embodiment, the composite board body 101 is a wood-plastic composite board body, and the thickness of the composite board body 101 is not less than 4 cm. The wood-plastic composite board body combines the beauty of wood and the durability of plastic, and has the advantages of environmental protection, moisture resistance, insect prevention, etc. The design with a thickness not less than 4 cm ensures that the composite board body has sufficient rigidity and wear resistance, and can withstand various impacts and abrasions in daily use.

[0104] Specifically, in this embodiment, the upper surface of the composite board body 101 is covered with a wrapping layer 3 through a co-extrusion process. The wrapping layer 3 is an ASA resin material layer. Covering the upper surface of the composite board body 101 with an ASA resin material layer as the wrapping layer 3 through a co-extrusion process not only improves the wear resistance, weather resistance and anti-ultraviolet performance of the floor, but also makes the floor surface smoother, more beautiful, and easier to clean and maintain. The excellent performance of ASA resin further extends the service life of the floor.

[0105] The above specific embodiment details together constitute a complete design of a high-strength, high-wear-resistant and corrosion-resistant board, enabling it to exhibit excellent performance and lasting durability in various application scenarios.

[0106] Embodiment 2

[0107] As Figures 6 - 7 shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a preparation process for a high-strength, high-wear-resistant and corrosion-resistant board, including the following steps:

[0108] S1: Prepare the raw materials for the composite board body (101), including the following raw materials in parts by weight:

[0109] Corn straw with a particle size of 100 - 200 mesh: 19 parts, wood powder with a particle size of 400 - 500 mesh: 10 parts, modified polypropylene: 58 parts, ethylene-vinyl acetate copolymer: 15 parts, silane coupling agent: 0.7 parts, modified filler: 3 parts, calcium stearate: 2 parts, antibacterial agent (silver ion antibacterial agent, purchased from Nanjing Tianshi Blue Shield Biotechnology Co., Ltd., model: silver ion antibacterial agent - LD904): 0.4 parts, and antioxidant (model: Irganox1010, BASF): 0.2 parts.

[0110] The preparation method of the modified polypropylene includes the following steps:

[0111] (1) Mix 1 part by weight of graphene oxide (the sheet diameter of graphene oxide is 0.5 - 5 μm, the thickness is 0.8 - 1.2 nm, purchased from Xianfeng Nano) and 120 parts by weight of deionized water, disperse by ultrasonic wave, then add 0.3 part by weight of silane coupling agent KH560, mix evenly, heat up to 72 °C, stir and react for 2.5 h, then add 0.15 part by weight of hydrazine hydrate and 1.2 parts by weight of ammonia water, carry out reduction reaction under stirring for 3 h, filter by suction and dry to obtain silane-modified reduced graphene oxide;

[0112] (2) Dissolve 25 parts by weight of polypropylene in 110 parts by weight of xylene at 132 °C, then add 2 parts by weight of silane-modified reduced graphene oxide, stir and react for 6 h under heat preservation conditions, and dry under vacuum to obtain modified polypropylene.

[0113] Polypropylene, purchased from Formosa Plastics Industry (Ningbo) Co., Ltd.; model 1450T.

[0114] The ethylene-vinyl acetate copolymer includes ethylene-vinyl acetate copolymer A, ethylene-vinyl acetate copolymer B and ethylene-vinyl acetate copolymer C with a weight ratio of 1:1.3:0.6. The melt index of ethylene-vinyl acetate copolymer A is 7.5 g / 10 min, and the mass percentage of vinyl acetate units is 26%; the melt index of ethylene-vinyl acetate copolymer B is 25 g / 10 min, and the mass percentage of vinyl acetate units is 28%; the melt index of ethylene-vinyl acetate copolymer C is 150 g / 10 min, and the mass percentage of vinyl acetate units is 19%. All are purchased from Formosa Plastics Industry (Ningbo) Co., Ltd.; models 7470M, 7760H, 7A50H.

[0115] The modification of the filler includes the following steps:

[0116] (1) Mix titanium dioxide, lanthanum oxide and silicon dioxide with a weight ratio of 1.4:1:0.5 to obtain a mixed filler;

[0117] (2) Mix the mixed filler, silane coupling agent KH560, ethanol and deionized water with a weight ratio of 1:0.2:22:38, heat and stir at 82 °C for 4 h, cool, filter and wash to obtain silane-modified mixed filler;

[0118] (3) Mix the silane-modified mixed filler, nano-poly-tetrafluoroethylene (Daikin F-104 in Japan), polyvinylpyrrolidone (molecular weight 2000 Da) and an ethanol aqueous solution with a weight percentage of 45% with a weight ratio of 1:12:0.3:70, disperse evenly, and then carry out spray drying to obtain the modified filler.

[0119] The particle size of the titanium dioxide is 10 - 20 nm and the specific surface area is 30 - 100 m 2 / g; the particle size of lanthanum oxide is 30 - 50 nm, and the specific surface area is 20 - 40 m 2 / g; the particle size of silicon dioxide is 10 - 20 nm, and the specific surface area is 200 - 250 m 2 / g.

[0120] S2: Prepare the raw material of the metal plate body 201, that is, prepare a long-strip aluminum alloy plate body with a concave portion 202, a convex portion 203 and a through hole 204;

[0121] S3: Design a forming die 4. The inside of the forming die 4 has a composite plate body forming cavity, and a cover plate 404 is detachably installed at one end of the forming die 4. The cover plate 404 is used to block one end of the composite plate body forming cavity, and the cover plate 404 has a slot 405 for inserting the long-strip aluminum alloy plate body. A feed pipe 402 is fixedly installed on the outer wall of the forming die 4 through a plurality of uniformly arranged connecting pipes 401. The feed pipe 402 is connected to the inside of the composite plate body forming cavity through a plurality of connecting pipes 401, and a flange 403 communicating with its inside is fixedly installed on the feed pipe 402;

[0122] It should be noted that a column for forming the through groove 104 is fixedly installed in the composite plate body forming cavity inside the forming die 4. The cover plate 404 can be fixed by screws, or a telescopic element, such as a hydraulic cylinder, can be fixedly installed outside the forming die 4. An insertion rod is installed on the piston rod of the hydraulic cylinder, and the insertion rod can pass through the forming die 4 and insert into the jack on the side of the cover plate 404 to lock the cover plate 404.

[0123] S4: Assemble the forming die 4 and the extruder, and fixedly connect the flange 403 to the extrusion head of the extruder through bolts;

[0124] S5: Mix the raw materials of the composite plate body (101) in step S1 evenly with a mixer, and then melt and blend the evenly mixed raw materials through a twin-screw extruder at 180 °C, extrude and pelletize to obtain wood-plastic composite pellets;

[0125] S6: After heating and melting the wood-plastic composite pellets prepared in step S5 in the extruder in step S4 to an appropriate temperature, insert one end of the long-strip aluminum alloy plate body into the composite plate body forming cavity inside the forming die 4 through the slot 405, and then use the extruder to extrude the molten raw materials into the feed pipe 402 and then enter the composite plate body forming cavity inside the forming die 4 through a plurality of uniformly arranged connecting pipes 401;

[0126] S7: After the raw materials in the composite plate body forming cavity are formed, remove the cover plate 404, then take out the formed wood-plastic composite plate body together with the long-strip aluminum alloy plate body, and quickly cool and shape it through a cooling device (such as a fan) to keep its shape and size stable;

[0127] S8: Post-treatment: Perform cutting and trimming post-treatment as needed to obtain a finished high-strength, high-wear-resistant, and corrosion-resistant plate.

[0128] S9: Inspection and Packaging: Conduct quality inspection on the finished product, including appearance, dimensions, and mechanical property indicators. After passing the inspection, perform packaging and warehousing.

[0129] Example 3

[0130] The difference between this example and Example 1 is that this example provides an application of a high-strength, high-wear-resistant, and corrosion-resistant plate, which is applied to splicing floors.

[0131] In summary, the high-strength, high-wear-resistant, and corrosion-resistant plate, its preparation process and application provided in this example have the following advantages:

[0132] Through innovative designs such as an integrated co-extrusion process, seamless splicing design, and the concave-convex alternating structure of the metal plate body, the high-strength, high-wear-resistant, and corrosion-resistant plate achieves excellent properties such as high strength, high wear resistance, and corrosion resistance, and has advantages such as easy installation, easy maintenance, and good aesthetics. It can solve the problems that dust and garbage are prone to accumulate in the connection gaps of traditional wood-plastic floors, and even the excessive connection gaps are prone to cause people to trip, which is very inconvenient. At the same time, it makes up for the deficiencies in aspects such as the structural strength, bearing capacity, compressive and anti-deformation ability of traditional wood-plastic floors, as well as the common problems of thermal expansion and contraction and easy fracture.

[0133] By optimizing the formula and preparation process, the interfacial compatibility between wood fibers and the resin matrix is improved, making the composite material more uniform and dense, and reducing the generation of defects and cracks.

[0134] The preparation method is simple and efficient, easy for industrial production, with low product cost and good environmental protection, and has broad market application prospects.

[0135] Comparative Example 1

[0136] The difference between this comparative example and Example 2 is that 58 parts of modified polypropylene and 15 parts of ethylene-vinyl acetate copolymer are replaced with 65 parts of modified polypropylene and 8 parts of ethylene-vinyl acetate copolymer.

[0137] Comparative Example 2

[0138] The difference between this comparative example and Example 2 is that modified polypropylene is replaced with polypropylene, which is purchased from Formosa Plastics Industry (Ningbo) Co., Ltd.; model 1450T. 2 parts by weight of graphene is added to the raw materials of the composite plate body (101). The sheet diameter of graphene oxide is 0.5 - 5μm, and the thickness is 0.8 - 1.2nm. It is purchased from Xianfeng Nano.

[0139] Comparative Example 3

[0140] The difference between this comparative example and Example 2 is that the ethylene-vinyl acetate copolymer comprises ethylene-vinyl acetate copolymer A, ethylene-vinyl acetate copolymer B and ethylene-vinyl acetate copolymer C with a weight ratio of 1:1:1. The melt index of ethylene-vinyl acetate copolymer A is 7.5 g / 10 min, and the mass percentage of vinyl acetate units is 26%; the melt index of ethylene-vinyl acetate copolymer B is 25 g / 10 min, and the mass percentage of vinyl acetate units is 28%; the melt index of ethylene-vinyl acetate copolymer C is 150 g / 10 min, and the mass percentage of vinyl acetate units is 19%. All are purchased from Formosa Plastics Industries (Ningbo) Co., Ltd.; the models are 7470M, 7760H, and 7A50H.

[0141] Comparative Example 4

[0142] The difference between this comparative example and Example 2 is that the melt index of ethylene-vinyl acetate copolymer A is 400 g / 10 min, and the mass percentage of vinyl acetate units is 19%; the melt index of ethylene-vinyl acetate copolymer B is 5.5 g / 10 min, and the mass percentage of vinyl acetate units is 26%; the melt index of ethylene-vinyl acetate copolymer C is 400 g / 10 min, and the mass percentage of vinyl acetate units is 28%. All are purchased from Formosa Plastics Industries (Ningbo) Co., Ltd.; the models are 7B50H, 7470K, and 7B60H.

[0143] Comparative Example 5

[0144] The difference between this comparative example and Example 2 is that titanium dioxide, lanthanum oxide and silicon dioxide with a weight ratio of 1:1:1 are mixed to obtain a mixed filler.

[0145] Comparative Example 6

[0146] The difference between this comparative example and Example 2 is that the modified filler comprises the following steps:

[0147] (1) Mix titanium dioxide, lanthanum oxide and silicon dioxide with a weight ratio of 1.4:1:0.5 to obtain a mixed filler;

[0148] (2) Mix the mixed filler, 55 wt% ethanol aqueous solution and silane coupling agent KH560 with a mass ratio of 1:7:0.02, stir and react at 65 °C for 4 h, filter to obtain a solid, wash and dry to obtain the modified filler.

[0149] Comparative Example 7

[0150] The difference between this comparative example and Example 2 is that the particle size of the titanium dioxide is 40 - 70 nm and the specific surface area is 20 - 60 m 2 / g; The particle size of lanthanum oxide is 80 - 100 nm and the specific surface area is 5 - 15 m 2 / g; The particle size of silicon dioxide is 50 - 80 nm and the specific surface area is 100 - 150 m 2 / g.

[0151] Performance Test

[0152] According to the raw materials of the composite plate body (101) in Example 2 and Comparative Examples 1 - 7, mix them evenly with a mixer, and then melt - blend the evenly - mixed raw materials through a twin - screw extruder at 180 °C, extrude and pelletize to obtain wood - plastic composite pellets; after heating and melting the wood - plastic composite pellets in an extruder to an appropriate temperature, cool and shape them to prepare a plate with a thickness of 27 mm. Refer to GB17657 - 2013 for performance testing of the plate.

[0153] Percentage increase in mass after boiling water resistance = (MOR after boiling water - MOR before boiling water) / MOR before boiling water * 100%.

[0154] Method for testing corrosion resistance: After inoculating Coriolus versicolor on potato dextrose agar medium (PDA) and culturing for 10 d, use a sterile punch to cut out a mycelium block with a diameter of about 5 mm, and insert it into the middle of the river sand sawdust medium with feeding wood, and culture it in an incubator at 28 °C for about 10 days. When the surface of the river sand sawdust medium is covered with mycelium, the sterilized plate can be inserted. Place the test bottle containing the plate in an incubator at 28 °C and a relative humidity of 85% for 12 weeks, then take out the plate, scrape off the surface mycelium and impurities, dry it to a constant weight in an oven at 100 ± 5 °C, and calculate the mass loss rate of the plate before and after decay. The calculation formula = (Mass of the plate before corrosion - Mass of the plate after corrosion) / Mass of the specimen before corrosion * 100%.

[0155] Table 1 Performance Test Results

[0156]

[0157]

[0158] As can be seen from Table 1, the plates prepared from the raw materials of Example 2 have excellent comprehensive performance. In Comparative Example 1, the addition amounts of modified polypropylene and ethylene - vinyl acetate copolymer are changed, and the waterproof performance of the plate decreases; in Comparative Example 2, polypropylene is not modified, which affects the antibacterial and anti - corrosion properties of the plate. In Comparative Examples 3 and 4, the ratios and raw material parameters of adding ethylene - vinyl acetate copolymer are different, which affects the boiling water resistance performance of the plate. In Comparative Examples 5 and 7, the compositions and parameters of the fillers are different, and in Comparative Example 6, the filler modification method is different, resulting in a decrease in the wear resistance of the plate.

[0159] Example 3

[0160] AsFigures 8 - 10 As shown, the difference between this embodiment and Embodiments 1-2 is that the high-strength, high-wear-resistant, and corrosion-resistant plate provided is a solid structure, which includes a solid substrate 5 and a lining plate 2 embedded inside the substrate 5. A number of trapezoidal grooves 501 are equidistantly distributed at the bottom of the solid substrate 5. The upper part of the solid substrate 5 is also coated with an ASA resin material layer, and clamping grooves are provided on both sides of the solid substrate 5. By setting the solid substrate 5 with a solid structure, the overall strength of the high-strength, high-wear-resistant, and corrosion-resistant plate is improved to a higher level, making it more durable and not easily damaged.

[0161] The above are only preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustration content of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite plate, characterized in that: It is composed of the following raw materials in parts by weight: 18-20 parts of corn straw with a particle size of 100-200 mesh, 8-12 parts of wood flour with a particle size of 400-500 mesh, 54-60 parts of modified polypropylene, 12-17 parts of ethylene-vinyl acetate copolymer, 0.6-0.9 parts of silane coupling agent, 1-4 parts of modified filler, 1-3 parts of calcium stearate, 0.2-0.5 parts of antibacterial agent and 0.1-0.3 parts of antioxidant; The preparation method of modified polypropylene comprises the following steps: (1) 1 part by weight of graphene oxide is mixed with 100-150 parts by weight of deionized water, and ultrasonically dispersed. 0.2-0.4 parts by weight of silane coupling agent KH560 is added, and the mixture is evenly mixed. The mixture is heated to 70-75°C, and stirred for reaction for 2-3 hours. 0.1-0.2 parts by weight of hydrazine hydrate and 1-1.5 parts by weight of ammonia water are added, and the mixture is reduced for 2-4 hours under stirring. The mixture is filtered and dried to obtain silane-modified reduced graphene oxide. (2) dissolving 22-27 parts by weight of polypropylene in 100-120 parts by weight of xylene at 130-135°C, adding 1-3 parts by weight of silane-modified reduced graphene oxide, stirring and reacting for 5-8 hours under heat preservation conditions, and vacuum drying to obtain modified polypropylene; The modified filler comprises the following steps: (1) mixing titanium dioxide, lanthanum oxide, and silicon dioxide in a weight ratio of (1.2-1.5):1:(0.3-0.6) to obtain a mixed filler; (2) Mixing a mixed filler, a silane coupling agent KH560, ethanol, and deionized water in a weight ratio of 1: (0.1-0.3): (20-25): (35-40), heating and stirring at 80-85°C for 3-5 hours, cooling, filtering, and washing to obtain a silane-modified mixed filler; (3) Mixing a silane-modified mixed filler, nano-polytetrafluoroethylene, polyvinyl pyrrolidone and an ethanol aqueous solution with a weight ratio of 1: (10-15): (0.1-0.4): (60-80) and dispersing them evenly, spray drying them to obtain a modified filler.

2. The composite plate according to claim 1, characterized in that The particle size of titanium dioxide is 10-20nm and the specific surface area is 30-100m 2 / g; the particle size of lanthanum oxide is 30-50nm and the specific surface area is 20-40m 2 / g; the particle size of silicon dioxide is 10-20nm and the specific surface area is 200-250m 2 / g.

3. A high-strength, high-wear-resistant, and corrosion-resistant plate using the composite plate body according to claim 1 or 2, characterized in that: include: A substrate (1) and a lining plate (2) embedded in the substrate (1), wherein: The base plate (1) comprises the composite plate body (101) according to claim 1 or 2, and a plurality of the composite plate bodies (101) are spliced together to form a spliced floor.

4. An application of the high-strength, high-wear-resistant, anti-corrosion plate according to claim 3, characterized in that: It is used for splicing panels.

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