Environment-friendly breathable runway and construction method thereof

Abstract

The invention relates to the field of plastic runways, and particularly discloses an environment-friendly breathable runway and a construction method thereof. The environment-friendly breathable runway comprises a rubber surface layer, an elastic layer and a buffer layer which are sequentially arranged from top to bottom, wherein the thickness ratio is 15: 20: 18; the rubber surface layer comprises a wear-resistant layer, a breathable layer and an environment-friendly plastic bottom layer which are sequentially arranged from top to bottom, and the thickness ratio is 1: 1: 3; the breathable layer is prepared from the following raw materials in parts by weight: 60 to 70 parts of solvent-free single-component polyurethane adhesive; 25-35 parts of colored ethylene propylene diene monomer particles; 3 to 5 parts of an antioxidant 1010; 4-6 parts of an organosilicon waterproofing agent; 5-8 parts of a carbon nano tube; 3-5 parts of ramie fiber; and 4-6 parts of coffee grounds. The construction method comprises the following steps: cleaning and accepting a base layer; respectively preparing each layer of material; and all layers of structures are laid on the base layer in sequence. The environment-friendly breathable runway has excellent breathability and environmental protection performance.

Description

Technical Field

[0001] The present application relates to the field of plastic tracks, and more specifically, to an environmentally friendly breathable track and a construction method thereof. Background Art

[0002] The plastic track, also known as the track and field track, is mainly paved with materials such as polyurethane rubber. It has the characteristics of good flatness, high compressive strength, appropriate hardness and elasticity, and stable physical properties. It is conducive to the athletes' speed and technology, effectively improving athletic performance and reducing the rate of falls.

[0003] The TDI polyurethane plastic track that is currently widely laid has a base layer that is mostly a concrete construction surface, and a rubber surface layer is set on the base layer. The rubber surface layer is mainly composed of toluene diisocyanate polyurethane, plasticizers, catalysts and other raw materials. The raw materials contain a variety of toxic and harmful chemicals. If the toxic substances do not react completely during the laying process, this plastic track will become a "poison gas tank" and cause great harm to the environment and human body. In addition, this track has poor air permeability. When in a high temperature environment, the water vapor in the foundation cannot be quickly dissipated through the track, and the track is prone to bubbling and other damage. The waste track materials cleaned up during maintenance are extremely toxic and cannot be recycled, which will cause greater harm to the environment. Summary of the invention

[0004] In order to improve the air permeability and environmental protection performance of a runway, the present application provides an environmentally friendly breathable runway and a construction method thereof.

[0005] In the first aspect, the present application provides an environmentally friendly breathable runway, which adopts the following technical solution: An environmentally friendly breathable running track comprises a rubber surface layer, an elastic layer and a buffer layer which are sequentially arranged from top to bottom on a base layer, wherein the thickness ratio of the rubber surface layer, the elastic layer and the buffer layer is 15:20:18; the rubber surface layer comprises a wear-resistant layer, a breathable layer and an environmentally friendly plastic bottom layer which are sequentially arranged from top to bottom, wherein the thickness ratio of the wear-resistant layer, the breathable layer and the environmentally friendly plastic bottom layer is 1:1:3; The air permeable layer comprises the following raw materials in parts by weight: 60-70 parts of solvent-free single-component polyurethane adhesive; 25-35 parts of colored EPDM rubber particles; 3-5 parts of antioxidant 1010; 4-6 parts of silicone waterproofing agent; 5-8 parts of carbon nanotubes; 3-5 parts of ramie fibers; and 4-6 parts of coffee grounds.

[0006] By adopting the above technical solution, the rubber surface layer, as the top layer of the runway, is the layer that is in direct contact with people and air. It is composed of an environmentally friendly plastic base layer, a breathable layer and a wear-resistant layer, all of which have the functions of breathability and environmental protection. Among them, the environmentally friendly plastic base layer, as the basis of the rubber surface layer, provides support and maximum functional characteristics, and the materials are environmentally friendly; the breathable layer can effectively dissipate volatiles during the laying of the runway, further reducing pollution damage. When the weather is hot, water vapor can also be effectively dissipated through the breathable layer, reducing damage to the runway, thereby reducing the maintenance frequency and further improving the environmental performance; the wear-resistant layer reduces the degree of wear of the runway, further reducing the maintenance frequency of the runway, thereby improving the environmental performance.

[0007] The raw materials of the breathable layer use environmentally friendly solvent-free one-component polyurethane adhesive as the bonding material and elastic basis, and colored EPDM rubber particles are added to increase its elasticity and wear resistance. The layer structure prepared with the two as the main components has excellent hydrophobic and breathable properties; antioxidants and silicone waterproofing agents are used as functional additives to improve the anti-aging and waterproof capabilities of the breathable layer to reduce the impact of climate and water on the material. Carbon nanotubes, ramie fibers and coffee grounds are compounded. Both carbon nanotubes and ramie fibers are hollow structures. The two are combined to form a mesh breathable structure with multi-directional support. Coffee grounds are filled in the larger gaps in the mesh breathable structure to provide more point-like breathable channels. The three are compounded to form multi-dimensional breathable channels in the breathable layer together with sufficient supporting force, thereby improving the breathability of the runway, reducing the accumulation of water vapor and reducing damage to the runway.

[0008] An elastic layer is set under the rubber surface layer, which can improve the elasticity and shock absorption performance of the runway; a buffer layer is set under the elastic layer. As a layer structure between the elastic layer and the base layer, the buffer layer has elasticity and toughness, which can effectively reduce the damage to the base layer caused by runway damage, and can also effectively reduce the damage to the runway caused by cracking of the base layer after being affected by climate.

[0009] Therefore, the effect of improving the air permeability and environmental performance of the running track is obtained.

[0010] Optionally, the air permeable layer further comprises the following raw materials in parts by weight: 6 to 8 parts of hydrophobically modified porous polystyrene microspheres; and 5 to 8 parts of sodium alginate.

[0011] By adopting the above technical scheme, hydrophobically modified porous polystyrene microspheres and sodium alginate are also added to the breathable layer. The hydrophobically modified porous polystyrene microspheres have surface hydrophobicity and excellent porosity, which can effectively block water, reduce the accumulation of water vapor in the runway, and effectively promote the flow of water vapor in the breathable layer, which can be dissipated along the breathable channel. When there is a lot of water vapor, sodium alginate can quickly absorb water and form a three-dimensional network structure, providing a large number of adsorption sites to adsorb hydrophobically modified porous polystyrene microspheres, further promoting the flow and dissipation of water vapor.

[0012] Optionally, the preparation method of the hydrophobically modified porous polystyrene microspheres is as follows: Wash and dry the porous polystyrene microspheres for later use; Preparation of coating solution: Add a small amount of acetic acid solution to ethanol and stir evenly, slowly add silane coupling agent and continue stirring until the solution becomes clear, add polytetrafluoroethylene powder, the weight ratio of polytetrafluoroethylene powder to porous polystyrene microspheres is 1:2, and then add a small amount of deionized water and continue stirring to allow the silane coupling agent to undergo partial hydrolysis reaction, and let it stand for 6 hours to allow the silane coupling agent to further hydrolyze and form a stable sol; Coating by dipping; coating curing; cleaning and post-treatment.

[0013] By adopting the above technical scheme, polytetrafluoroethylene powder is added when the surface of the porous polystyrene microspheres is hydrophobically modified, so that more polytetrafluoroethylene powder is bonded to the surface of the porous polystyrene microspheres, which can effectively improve the thermal stability of the hydrophobically modified porous polystyrene microspheres, further reduce the influence of water vapor on its strength in high temperature weather, and effectively improve the lubrication properties of the hydrophobically modified porous polystyrene microspheres, which is helpful for the dispersion of the hydrophobically modified porous polystyrene microspheres in the breathable layer and improve the wear resistance of the runway.

[0014] Optionally, the environmentally friendly plastic base layer includes the following raw materials in parts by weight: 60-70 parts of solvent-free one-component polyurethane adhesive; 25-35 parts of colored EPDM rubber particles; 5-8 parts of fine sand; 3-5 parts of antioxidant 1010; 3-5 parts of silicon carbide powder; 5-8 parts of carbon nanotubes; 4-6 parts of silicone waterproofing agent; and 6-8 parts of polypropylene mesh fibers.

[0015] By adopting the above technical solution, carbon nanotubes provide air permeable channels in the environmentally friendly plastic base layer, and the compound of fine sand, silicon carbide powder and polypropylene mesh fibers improves the tensile strength and toughness of the environmentally friendly plastic base layer to provide better support for the runway.

[0016] Optionally, the wear-resistant layer comprises the following raw materials in parts by weight: 60-70 parts of solvent-free one-component polyurethane adhesive; 20-30 parts of colored EPDM rubber particles; 6-8 parts of nano titanium dioxide; 3-5 parts of antioxidant 1010; 3-5 parts of silicon carbide powder; and 5-8 parts of carbon nanotubes.

[0017] By adopting the above technical solution, carbon nanotubes provide air permeable channels, and nano titanium dioxide and silicon carbide powder can not only reduce ultraviolet damage but also provide excellent mechanical strength, thereby improving the wear resistance of the wear-resistant layer.

[0018] Optionally, the buffer layer includes the following raw materials in parts by weight: 30-50 parts of SBS modified asphalt; 15-20 parts of colored EPDM rubber particles; 6-8 parts of polypropylene mesh fibers; 5-10 parts of sodium stearate; 10-20 parts of mineral powder; and 8-12 parts of lignin fibers.

[0019] By adopting the above technical solution, the buffer layer uses SBS modified asphalt as the main bonding material and supporting material, and polypropylene mesh fiber and lignin fiber are compounded to improve the strength and air permeability of the buffer layer.

[0020] Optionally, the elastic layer comprises the following raw materials in parts by weight: 50-70 parts of solvent-free one-component polyurethane adhesive; 10-20 parts of colored EPDM rubber particles; 20-25 parts of micro-foamed TPU particles; 6-8 parts of calcium silicate; 6-8 parts of hollow glass microbeads; and 5-8 parts of polyacrylonitrile fibers.

[0021] By adopting the above technical solution, micro-foamed TPU particles are used to replace part of the colored EPDM rubber particles in the elastic layer, which effectively improves the elasticity and toughness of the elastic layer. Polyacrylonitrile fiber has excellent hydrophobicity and can serve as a mesh rigid support in the elastic layer. Calcium silicate can absorb moisture to alleviate the situation where moisture rises and affects the rubber surface layer. Hollow glass microbeads and micro-foamed TPU particles are distributed along the polyacrylonitrile fiber to produce breathable channels to improve the breathability of the runway.

[0022] In a second aspect, the present application provides a construction method for an environmentally friendly breathable runway, which adopts the following technical solution: A construction method for an environmentally friendly breathable runway comprises the following steps: (1) Base cleaning and acceptance: Before construction, the bearing capacity, flatness and slope of the base should be inspected and accepted, and there should be no major cracks. The surface of the base should be dry and clean. (2) Prepare the materials for the rubber surface layer, the elastic layer and the buffer layer respectively and set them aside; (3) Spread the buffer layer on the base layer, and then spread the elastic layer after it solidifies, and wait for it to solidify naturally; each layer needs to be polished and leveled after solidification; (4) Spray the environmentally friendly plastic base layer on the elastic layer, spray the breathable layer after it solidifies, spray the wear-resistant layer after the breathable layer solidifies, and wait for it to solidify naturally; each layer needs to be polished and leveled after solidification.

[0023] By adopting the above technical solution and the above construction method, the runway after construction has excellent air permeability and environmental protection performance.

[0024] In summary, this application has the following beneficial effects: 1. Since the present application adds a breathable layer, the breathable layer uses an environmentally friendly solvent-free single-component polyurethane adhesive as a bonding material and elastic basis, and adds colored EPDM rubber particles to increase its elasticity and wear resistance. The layer structure prepared with the two as the main components has excellent hydrophobic and breathable properties; antioxidants and silicone waterproofing agents are used as functional additives to improve the anti-aging and waterproof capabilities of the breathable layer to reduce the impact of climate and water on the material. Carbon nanotubes, ramie fibers and coffee grounds are compounded to form a multi-dimensional breathable channel in the breathable layer, and have sufficient support, thereby improving the breathability of the runway, reducing the accumulation of water vapor, and reducing the damage to the runway. The effect of improving the breathability and environmental performance of the runway is achieved.

[0025] 2. In this application, hydrophobically modified porous polystyrene microspheres and sodium alginate are preferably used. Sodium alginate can quickly absorb water and form a three-dimensional network structure, providing a large number of adsorption sites to adsorb hydrophobically modified porous polystyrene microspheres, which can effectively block water, reduce the accumulation of water vapor in the runway, and effectively promote the flow of water vapor in the breathable layer, which can be emitted along the breathable channel. The effect of improving the breathability and environmental protection of the runway is achieved.

[0026] 3. The construction method of the present application provides a runway with excellent air permeability and environmental protection performance after construction. DETAILED DESCRIPTION

[0027] The present application is further described in detail with reference to the following examples. It is specially noted that if no specific conditions are specified in the following examples, the conventional conditions or the conditions recommended by the manufacturer are followed, and the raw materials used in the following examples can be obtained from common commercial sources unless otherwise specified.

[0028] Solvent-free one-component polyurethane adhesive was purchased from Jiangsu Rainbow Sports Facilities Materials Co., Ltd.

[0029] Colored EPDM rubber particles were purchased from Jiangsu Rainbow Sports Facilities Materials Co., Ltd.

[0030] Antioxidant 1010, CAS: 6683-19-8.

[0031] Silicone waterproofing agent was purchased from Shandong Luderui New Materials Co., Ltd.

[0032] Carbon nanotubes, length 20±10μm, diameter 15±5nm, CAS: 1333-86-4.

[0033] Ramie fiber, length 90±10mm.

[0034] Coffee grounds, 500 mesh.

[0035] Porous polystyrene microspheres, particle size 20 μm, surface micropores average pore size 20 nm, internal macropores average pore size 1 μm. Purchased from Beijing Zhongke Keyou Technology Co., Ltd.

[0036] Polytetrafluoroethylene powder, average particle size 1μm, CAS number: 9002-84-0.

[0037] Silane coupling agent: methyltrimethoxysilane, CAS number: 1185-55-3.

[0038] Sodium alginate: Ultra-high viscosity type II, 1% viscosity: 7000-10000mPa.s.

[0039] Fine sand, particle size 1±0.2mm.

[0040] Silicon carbide powder, particle size 5 μm, was purchased from Shanghai Xiangtian Nanomaterials Co., Ltd., product number XT-SIC-09.

[0041] Polypropylene mesh fiber, length 20±5mm.

[0042] Nano titanium dioxide, particle size 50nm.

[0043] SBS modified asphalt, brand: Yantai Huatong, product number: 2021110702.

[0044] Sodium stearate, USP grade, Cas number: 822-16-2.

[0045] Mineral powder, S95 grade.

[0046] Lignin fiber, length 5mm.

[0047] Micro-foamed TPU particles were purchased from Jiangsu Rainbow Sports Facilities Materials Co., Ltd.

[0048] Calcium silicate, Cas number: 1344-95-2.

[0049] Hollow glass microspheres, fineness 4000 mesh, CAS number: 65997-17-3, brand: Wensheng.

[0050] Polyacrylonitrile fiber, single filament diameter 13±10 μm, was purchased from Taian Tonghong Fiber Co., Ltd.

[0051] Preparation Example of Hydrophobically Modified Porous Polystyrene Microspheres Preparation Example 1 The preparation method of hydrophobically modified porous polystyrene microspheres is as follows: Take 10 kg of porous polystyrene microspheres, wash and dry the porous polystyrene microspheres for later use.

[0052] Preparation of coating solution: Add a small amount of acetic acid solution to ethanol and stir evenly, slowly add silane coupling agent, methyltrimethoxysilane is selected as the silane coupling agent, continue stirring until the solution becomes clear, add polytetrafluoroethylene powder, the weight ratio of polytetrafluoroethylene powder to porous polystyrene microspheres is 1:2, then add a small amount of deionized water and continue stirring to make the silane coupling agent partially hydrolyze, let it stand for 6 hours, so that the silane coupling agent is further hydrolyzed and forms a stable sol; Dipping coating: adding porous polystyrene microspheres into the coating solution to ensure that the porous polystyrene microspheres are completely immersed, ultrasonic treatment for 10 minutes to make the surface of the porous polystyrene microspheres evenly covered with the coating solution, and centrifugation to separate the porous polystyrene microspheres; Coating curing: The coated porous polystyrene microspheres were placed in the air to dry naturally, and then heat treated at 100°C for 2h to cure the coating; Cleaning and post-treatment: The solidified porous polystyrene microspheres were centrifuged and washed with ethanol for several times to remove the unreacted silane coupling agent; the porous polystyrene microspheres were centrifuged again and blown dry with nitrogen to ensure that the surface was completely dry.

[0053] Preparation Example 2 The difference between this preparation example and preparation example 1 is that no polytetrafluoroethylene powder is added in this preparation example.

[0054] Preparation Example 3 The difference between this preparation example and preparation example 1 is that in this preparation example, the porous polystyrene microspheres are not modified and are only used after being cleaned and dried.

[0055] An environmentally friendly breathable running track comprises a rubber surface layer, an elastic layer and a buffer layer which are arranged in sequence from top to bottom on a base layer, wherein the rubber surface layer is 15 mm thick, the elastic layer is 20 mm thick, and the buffer layer is 18 mm thick.

[0056] The rubber surface layer includes a wear-resistant layer, a breathable layer and an environmentally friendly plastic bottom layer which are arranged in sequence from top to bottom. The thickness of the wear-resistant layer is 3mm, the thickness of the breathable layer is 3mm, and the thickness of the environmentally friendly plastic bottom layer is 9mm.

[0057] The wear-resistant layer includes the following raw materials: 60kg of solvent-free one-component polyurethane adhesive; 30kg of colored EPDM rubber particles; 6kg of nano titanium dioxide; 3kg of antioxidant 1010; 3kg of silicon carbide powder; and 5kg of carbon nanotubes.

[0058] The preparation method of the wear-resistant layer material is as follows: take various raw materials according to the proportion, stir and mix them evenly, and set them aside.

[0059] The breathable layer includes the following raw materials: 60kg of solvent-free one-component polyurethane adhesive; 35kg of colored EPDM rubber particles; 3kg of antioxidant 1010; 4kg of silicone waterproofing agent; 5kg of carbon nanotubes; 3kg of ramie fiber; and 4kg of coffee grounds.

[0060] The preparation method of the breathable layer material is as follows: taking various raw materials according to the proportion, stirring and mixing them evenly, and setting aside.

[0061] The environmentally friendly plastic base layer includes the following raw materials: 60kg of solvent-free one-component polyurethane adhesive; 35kg of colored EPDM rubber particles; 5kg of fine sand; 3kg of antioxidant 1010; 3kg of silicon carbide powder; 5kg of carbon nanotubes; 4kg of silicone waterproofing agent; and 6kg of polypropylene mesh fiber.

[0062] The preparation method of the environmentally friendly plastic base layer is as follows: take various raw materials according to the proportion, stir and mix them evenly, and set aside.

[0063] The elastic layer includes the following raw materials: 50kg of solvent-free one-component polyurethane adhesive; 20kg of colored EPDM rubber particles; 25kg of micro-foamed TPU particles; 6kg of calcium silicate; 6kg of hollow glass microbeads; and 5kg of polyacrylonitrile fiber.

[0064] The preparation method of the elastic layer is as follows: taking various raw materials according to the proportion, stirring and mixing them evenly, and setting aside.

[0065] The buffer layer includes the following raw materials: 30kg of SBS modified asphalt; 20kg of colored EPDM rubber particles; 6kg of polypropylene mesh fiber; 5kg of sodium stearate; 20kg of mineral powder; and 8kg of lignin fiber.

[0066] The preparation method of the buffer layer is as follows: take various raw materials according to the proportion, mix the various raw materials evenly at 160° C., and set aside.

[0067] A construction method for an environmentally friendly breathable runway comprises the following steps: (1) Base cleaning and acceptance: Before construction, the bearing capacity, flatness, and slope of the base should be accepted and there should be no large cracks. After the base is accepted, the runway and the shape pattern are measured and laid out with a theodolite, and then the outline of the pattern is drawn with acrylic paint. At the same time, use a broom to sweep or use an air compressor to blow away the dust and debris on the surface of the base to avoid affecting the bonding strength between the black plastic layer and the base, causing hollowing and warping. When there are convex areas on the surface, use a scraper or other tools to scrape and clean them to avoid affecting the flatness of the plastic runway. When there is obvious water accumulation on the surface, use a mop to wipe it dry to avoid bubbling reaction between the adhesive and the accumulated water. Before the primer is applied, the surface of the base should be dry, clean, and free of cracks.

[0068] (2) Prepare the materials for the rubber surface layer, elastic layer and buffer layer according to the above raw material ratios and set aside.

[0069] (3) Spread the buffer layer on the base layer, and then spread the elastic layer after it solidifies, and wait for it to solidify naturally. During construction, make the feeding speed of the paving material consistent with the paving speed, and control the paving speed at about 1-2m / min, so that the paver runs smoothly and paving continuously. Each layer needs to be polished and leveled after solidification.

[0070] (4) Spray the environmentally friendly plastic base layer on the elastic layer, spray the breathable layer after it solidifies, spray the wear-resistant layer after the breathable layer solidifies, and wait for it to solidify naturally. The spraying pressure is 8kg / m 2 , first spray horizontally, then spray vertically to ensure that the bottom is not exposed. After each layer is cured, it needs to be sanded and leveled.

[0071] The difference between this embodiment and embodiment 1 is that the amounts of various raw materials are different, see Table 1 for details.

[0072] The difference between this embodiment and embodiment 1 is that the amounts of various raw materials are different, see Table 1 for details.

[0073] Table 1 Amount of raw materials used in each layer structure in Examples 1 to 3 The difference between this embodiment and embodiment 1 is that the raw materials of the air permeable layer further include 6 kg of hydrophobically modified porous polystyrene microspheres and 5 kg of sodium alginate obtained in preparation example 1. The amounts of the raw materials used in the air permeable layer are detailed in Table 2.

[0074] The difference between this embodiment and embodiment 4 is that the amounts of hydrophobically modified porous polystyrene microspheres and sodium alginate are different. The amounts of each raw material in the breathable layer are detailed in Table 2.

[0075] The difference between this embodiment and embodiment 4 is that the amounts of hydrophobically modified porous polystyrene microspheres and sodium alginate are different. The amounts of each raw material in the breathable layer are detailed in Table 2.

[0076] The difference between this embodiment and embodiment 5 is that the hydrophobically modified porous polystyrene microspheres are prepared by Preparation Example 2. The amounts of the raw materials used in the air permeable layer are shown in Table 2.

[0077] The difference between this embodiment and embodiment 5 is that the hydrophobically modified porous polystyrene microspheres are prepared by Preparation Example 3. The amounts of the raw materials used in the air permeable layer are shown in Table 2.

[0078] The difference between this embodiment and embodiment 5 is that there is no sodium alginate in the air permeable layer of this embodiment. The amount of each raw material in the air permeable layer is shown in Table 2.

[0079] The difference between this embodiment and embodiment 5 is that the air permeable layer of this embodiment does not contain hydrophobically modified porous polystyrene microspheres. The amounts of various raw materials used in the air permeable layer are detailed in Table 2.

[0080] Table 2 Specifications and dosage of raw materials in the air permeable layer of some embodiments and comparative examples The difference between this embodiment and embodiment 2 is that the wear-resistant layer of this embodiment does not contain carbon nanotubes, nano titanium dioxide and silicon carbide powder. The amount of each raw material used in the wear-resistant layer is shown in Table 3.

[0081] The difference between this embodiment and embodiment 2 is that there is no carbon nanotube in the wear-resistant layer of this embodiment. The amount of each raw material in the wear-resistant layer is shown in Table 3.

[0082] The difference between this embodiment and embodiment 2 is that there is no nano titanium dioxide in the wear-resistant layer of this embodiment. The amount of each raw material in the wear-resistant layer is shown in Table 3.

[0083] The difference between this embodiment and embodiment 2 is that there is no silicon carbide powder in the wear-resistant layer of this embodiment. The amount of each raw material in the wear-resistant layer is shown in Table 3.

[0084] Table 3 Amounts of raw materials used in the wear-resistant layer in some examples The difference between this embodiment and embodiment 2 is that the environmentally friendly plastic bottom layer of this embodiment does not contain carbon nanotubes, fine sand, silicon carbide powder and polypropylene mesh fibers. The amount of each raw material in the environmentally friendly plastic bottom layer is shown in Table 4.

[0085] The difference between this embodiment and embodiment 2 is that the environmentally friendly plastic bottom layer of this embodiment does not contain carbon nanotubes. The amounts of various raw materials used in the environmentally friendly plastic bottom layer are detailed in Table 4.

[0086] The difference between this embodiment and embodiment 2 is that there is no fine sand in the environmentally friendly plastic bottom layer of this embodiment. The amount of each raw material in the environmentally friendly plastic bottom layer is shown in Table 4.

[0087] The difference between this embodiment and embodiment 2 is that the environmentally friendly plastic bottom layer of this embodiment does not contain silicon carbide powder. The amount of each raw material in the environmentally friendly plastic bottom layer is shown in Table 4.

[0088] The difference between this embodiment and embodiment 2 is that the environmentally friendly plastic bottom layer of this embodiment does not contain polypropylene mesh fibers. The amounts of various raw materials used in the environmentally friendly plastic bottom layer are detailed in Table 4.

[0089] Table 4 Amounts of various raw materials used in the environmentally friendly plastic base layer in some embodiments The difference between this embodiment and embodiment 2 is that the elastic layer of this embodiment does not contain micro-foamed TPU particles, polyacrylonitrile fibers, calcium silicate and hollow glass microspheres. The amount of each raw material in the elastic layer is shown in Table 5.

[0090] The difference between this embodiment and embodiment 2 is that there are no micro-foamed TPU particles in the elastic layer of this embodiment. The amount of each raw material in the elastic layer is shown in Table 5.

[0091] The difference between this embodiment and embodiment 2 is that the elastic layer of this embodiment does not contain polyacrylonitrile fiber. The amount of each raw material used in the elastic layer is shown in Table 5.

[0092] The difference between this embodiment and embodiment 2 is that the elastic layer of this embodiment does not contain calcium silicate. The amount of each raw material used in the elastic layer is shown in Table 5.

[0093] The difference between this embodiment and embodiment 2 is that there are no hollow glass microspheres in the elastic layer of this embodiment. The amount of each raw material in the elastic layer is shown in Table 5.

[0094] Table 5 Amounts of raw materials used in the elastic layer in some embodiments The difference between this embodiment and embodiment 2 is that the buffer layer of this embodiment does not contain polypropylene mesh fibers and lignin fibers. The amounts of each raw material in the buffer layer are detailed in Table 6.

[0095] The difference between this embodiment and embodiment 2 is that there is no polypropylene mesh fiber in the buffer layer of this embodiment. The amount of each raw material in the buffer layer is shown in Table 6.

[0096] The difference between this embodiment and embodiment 2 is that there is no lignin fiber in the buffer layer of this embodiment. The amount of each raw material in the buffer layer is shown in Table 6.

[0097] Table 6 Amounts of raw materials used in the buffer layer in some examples Comparative Example Comparative Example 1 A TDI type polyurethane plastic track includes a rubber surface layer arranged on a base layer, the rubber surface layer has a thickness of 15 mm, and the rubber surface layer includes the following raw materials: Component A: 65kg polyether polyol, 20kg waste rubber particles, 2kg pigment, 3kg ethyl acetate. Mix all the raw materials evenly and set aside.

[0098] Component B: 30kg toluene diisocyanate (TDI), 1kg N,N-dimethylcyclohexylamine, mix well and set aside.

[0099] Select 80kg of component A and 20kg of component B, and stir thoroughly until they are well mixed.

[0100] A construction method for a TDI type polyurethane plastic runway comprises the following steps: (1) Base cleaning and acceptance: Before construction, the bearing capacity, flatness, and slope of the base should be accepted and there should be no large cracks. After the base is accepted, the runway and the shape pattern are measured and laid out with a theodolite, and then the outline of the pattern is drawn with acrylic paint. At the same time, use a broom to sweep or use an air compressor to blow away the dust and debris on the surface of the base to avoid affecting the bonding strength between the black plastic layer and the base, causing hollowing and warping. When there are convex areas on the surface, use a scraper or other tools to scrape and clean them to avoid affecting the flatness of the plastic runway. When there is obvious water accumulation on the surface, use a mop to wipe it dry to avoid bubbling reaction between the adhesive and the accumulated water. Before the primer is applied, the surface of the base should be dry, clean, and free of cracks.

[0101] (2) Prepare the materials for the rubber surface layer according to the above raw material ratio and set aside.

[0102] (3) Spread the rubber surface layer on the base and wait for it to solidify naturally. During construction, make the feeding speed of the paving material consistent with the paving speed, control the paving speed at about 1-2m / min, make the paver run smoothly, and pave continuously. After solidification, it needs to be polished and leveled.

[0103] Comparative Example 2 The difference between this comparative example and Example 2 is that the air permeable layer of this comparative example does not contain carbon nanotubes, ramie fibers and coffee grounds. The amounts of each raw material used in the air permeable layer are detailed in Table 2.

[0104] Comparative Example 3 The difference between this comparative example and Example 2 is that there are no carbon nanotubes in the air permeable layer of this comparative example. The amounts of each raw material in the air permeable layer are shown in Table 2.

[0105] Comparative Example 4 The difference between this comparative example and Example 2 is that there is no ramie fiber in the air permeable layer of this comparative example. The amount of each raw material used in the air permeable layer is shown in Table 2.

[0106] Comparative Example 5 The difference between this comparative example and Example 2 is that there is no coffee grounds in the air permeable layer of this comparative example. The amount of each raw material in the air permeable layer is shown in Table 2.

[0107] Comparative Example 6 The difference between this comparative example and Example 2 is that the air permeable layer of this comparative example does not contain carbon nanotubes and ramie fibers. The amounts of each raw material used in the air permeable layer are detailed in Table 2.

[0108] Comparative Example 7 The difference between this comparative example and Example 2 is that the air permeable layer of this comparative example does not contain ramie fibers and coffee grounds. The amounts of each raw material used in the air permeable layer are detailed in Table 2.

[0109] Comparative Example 8 The difference between this comparative example and Example 2 is that the air permeable layer of this comparative example does not contain carbon nanotubes and coffee grounds. The amounts of each raw material in the air permeable layer are shown in Table 2.

[0110] Comparative Example 9 The difference between this comparative example and Example 2 is that there is no buffer layer and elastic layer in this comparative example.

[0111] Comparative Example 10 The difference between this comparative example and Example 2 is that there is no buffer layer in this comparative example.

[0112] Comparative Example 11 The difference between this comparative example and Example 2 is that there is no elastic layer in this comparative example.

[0113] Comparative Example 12 The difference between this comparative example and Example 2 is that there is no air permeable layer and wear-resistant layer in this comparative example.

[0114] Comparative Example 13 The difference between this comparative example and Example 2 is that there is no air permeable layer in this comparative example.

[0115] Comparative Example 14 The difference between this comparative example and Example 2 is that there is no wear-resistant layer in this comparative example.

[0116] Comparative Example 15 The difference between this comparative example and Example 2 is that there is no breathable layer, elastic layer and buffer layer in this comparative example.

[0117] Performance testing Detection Methods With reference to "GB / T 14833-2020 Synthetic material sports field surface layer", according to the method in "7.2 Sampling", refer to "7.2.2.1 Casting profile surface layer" to sample and prepare samples of the runways constructed in different embodiments and comparative examples.

[0118] Determination of mechanical properties: The impact absorption performance was measured according to the method in Appendix B, and the impact absorption results are shown in Table 7; the vertical deformation performance was measured according to the method in Appendix C, and the vertical deformation results are shown in Table 7; the anti-slip performance was measured according to the method in Appendix D, and the anti-slip value results are shown in Table 7; the flame retardant performance was measured according to the method in Appendix E, and the flame retardant level is shown in Table 7; the tensile strength was measured according to the method specified in GB / T 10654, the tensile speed was 100±10mm / min, and the tensile strength results are shown in Table 7; the wear resistance was measured according to the method specified in GB / T 30314, and the test conditions were: grinding wheel type H18, load 1±0.001kg, speed 60r / min, and the wear amount results are shown in Table 7; the xenon lamp irradiation test was carried out according to the provisions of GB / T16422.2-2014, and the test conditions were method A, cycle number 1336h, placed in a standard laboratory environment for 24h, according to GB / T The tensile strength was measured by the method specified in 10654, the tensile speed was 100±10mm / min, and the tensile strength results after aging are shown in Table 7.

[0119] Determination of air permeability: The air permeability of the samples was tested using an air permeability tester. The air permeability results are shown in Table 7.

[0120] Table 7 Mechanical properties and air permeability test results Determination of environmental performance: With reference to the provisions of Appendix I of GB 36246-2018, the release of harmful substances of each sample was tested for the following items: total volatile organic compound TVOC, benzene, the sum of toluene, xylene and ethylbenzene; with reference to the provisions of GB 18583-2008, the content of free toluene diisocyanate (TDI) was measured.

[0121] In the test results, the above-mentioned harmful substances were not detected in the runways constructed in the embodiments of the present application and comparative examples 2 to 15. The content of harmful substances detected in comparative example 1 is as follows: Total volatile organic compounds TVOC: 7 mg / (m 2 *h); Benzene: 0.3 mg / (m 2 *h); The sum of toluene, xylene and ethylbenzene: 2.5 mg / (m 2 *h); TDI: 22g / kg.

[0122] It can be seen that the runway of the present application has excellent environmental protection performance.

[0123] It can be seen from Example 2 and Comparative Example 1 and Table 7 that the runway of the present application has excellent air permeability and mechanical properties.

[0124] From Example 2, Comparative Examples 2 to 8 and Table 7, it can be seen that due to the addition of carbon nanotubes, ramie fibers and coffee grounds in the breathable layer, the carbon nanotubes and ramie fibers are combined to form a mesh breathable structure with multi-directional support, and the coffee grounds are filled in the positions with larger gaps in the mesh breathable structure to provide more point-like breathable channels. The three are compounded to form multi-dimensional breathable channels in the breathable layer together with sufficient supporting force, thereby improving the breathability and mechanical properties of the runway.

[0125] It can be seen from Example 2, Comparative Examples 9 to 15 and Table 7 that the compounding of the various layer structures enables the air permeability and mechanical properties of the entire runway to achieve optimal effects.

[0126] It can be seen from Example 2, Example 5, and Example 7 to 10 and Table 7 that hydrophobically modified porous polystyrene microspheres and sodium alginate are added to the breathable layer. The hydrophobically modified porous polystyrene microspheres have surface hydrophobicity and excellent pores, which can effectively block water, reduce the accumulation of water vapor in the runway, and effectively promote the flow of water vapor in the breathable layer, which can be emitted along the breathable channel. When there is more water vapor, sodium alginate can quickly absorb water and form a three-dimensional network structure, providing a large number of adsorption sites to adsorb hydrophobically modified porous polystyrene microspheres, further promoting the flow and emission of water vapor. The combination of the two further improves the air permeability and mechanical properties of the runway.

[0127] It can be seen from Example 2, Examples 11 to 14 and Table 7 that the compound addition of carbon nanotubes, nano-titanium dioxide and silicon carbide powder in the wear-resistant layer can effectively improve the air permeability and mechanical properties of the runway.

[0128] It can be seen from Example 2, Examples 15 to 19 and Table 7 that the compound addition of carbon nanotubes, fine sand, silicon carbide powder and polypropylene mesh fibers in the environmentally friendly plastic base layer can effectively improve the air permeability and mechanical properties of the runway.

[0129] It can be seen from Example 2, Examples 20 to 24 and Table 7 that the compound addition of micro-foamed TPU particles, polyacrylonitrile fibers, calcium silicate and hollow glass microbeads in the elastic layer can effectively improve the air permeability and mechanical properties of the runway.

[0130] It can be seen from Example 2, Examples 25 to 27 and Table 7 that the compound addition of polypropylene mesh fibers and lignin fibers in the buffer layer can effectively improve the air permeability and mechanical properties of the runway.

[0131] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. An environmentally friendly breathable running track, characterized in that: The rubber surface layer comprises a rubber surface layer, an elastic layer and a buffer layer which are sequentially arranged on the base layer from top to bottom, wherein the thickness ratio of the rubber surface layer, the elastic layer and the buffer layer is 15:20:18; the rubber surface layer comprises a wear-resistant layer, a breathable layer and an environmentally friendly plastic bottom layer which are sequentially arranged from top to bottom, wherein the thickness ratio of the wear-resistant layer, the breathable layer and the environmentally friendly plastic bottom layer is 1:1:3; The air permeable layer comprises the following raw materials in parts by weight: 60-70 parts of solvent-free single-component polyurethane adhesive; 25-35 parts of colored EPDM rubber particles; 3-5 parts of antioxidant 1010; 4-6 parts of silicone waterproofing agent; 5-8 parts of carbon nanotubes; 3-5 parts of ramie fibers; and 4-6 parts of coffee grounds.

2. An environmentally friendly breathable running track according to claim 1, characterized in that: The air permeable layer further comprises the following raw materials in parts by weight: 6 to 8 parts of hydrophobically modified porous polystyrene microspheres; and 5 to 8 parts of sodium alginate.

3. The environmentally friendly breathable running track according to claim 2, characterized in that: The preparation method of the hydrophobically modified porous polystyrene microspheres is as follows: Wash and dry the porous polystyrene microspheres for later use; Preparation of coating solution: Add a small amount of acetic acid solution to ethanol and stir evenly, slowly add silane coupling agent and continue stirring until the solution becomes clear, add polytetrafluoroethylene powder, the weight ratio of polytetrafluoroethylene powder to porous polystyrene microspheres is 1:2, and then add a small amount of deionized water and continue stirring to allow the silane coupling agent to undergo partial hydrolysis reaction, and let it stand for 6 hours to allow the silane coupling agent to further hydrolyze and form a stable sol; Coating by dipping; coating curing; cleaning and post-treatment.

4. The environmentally friendly breathable running track according to claim 1, characterized in that: The environmentally friendly plastic base layer includes the following raw materials in parts by weight: 60-70 parts of solvent-free single-component polyurethane adhesive; 25-35 parts of colored EPDM rubber particles; 5-8 parts of fine sand; 3-5 parts of antioxidant 1010; 3-5 parts of silicon carbide powder; 5-8 parts of carbon nanotubes; 4-6 parts of silicone waterproofing agent; and 6-8 parts of polypropylene mesh fibers.

5. The environmentally friendly breathable running track according to claim 1, characterized in that: The wear-resistant layer comprises the following raw materials in parts by weight: 60-70 parts of solvent-free single-component polyurethane adhesive; 20-30 parts of colored EPDM rubber particles; 6-8 parts of nano titanium dioxide; 3-5 parts of antioxidant 1010; 3-5 parts of silicon carbide powder; and 5-8 parts of carbon nanotubes.

6. The environmentally friendly breathable running track according to claim 1, characterized in that: The buffer layer comprises the following raw materials in parts by weight: 30-50 parts of SBS modified asphalt; 15-20 parts of colored EPDM rubber particles; 6-8 parts of polypropylene mesh fibers; 5-10 parts of sodium stearate; 10-20 parts of mineral powder; and 8-12 parts of lignin fibers.

7. The environmentally friendly breathable running track according to claim 1, characterized in that: The elastic layer comprises the following raw materials in parts by weight: 50-70 parts of solvent-free single-component polyurethane adhesive; 10-20 parts of colored EPDM rubber particles; 20-25 parts of micro-foamed TPU particles; 6-8 parts of calcium silicate; 6-8 parts of hollow glass microbeads; and 5-8 parts of polyacrylonitrile fibers.

8. The construction method of an environmentally friendly breathable runway according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Base cleaning and acceptance: Before construction, the bearing capacity, flatness and slope of the base should be inspected and accepted, and there should be no major cracks. The surface of the base should be dry and clean. (2) Prepare the materials for the rubber surface layer, the elastic layer and the buffer layer respectively and set them aside; (3) Spread the buffer layer on the base layer, and then spread the elastic layer after it solidifies, and wait for it to solidify naturally; each layer needs to be polished and leveled after solidification; (4) Spray the environmentally friendly plastic base layer on the elastic layer, spray the breathable layer after it solidifies, spray the wear-resistant layer after the breathable layer solidifies, and wait for it to solidify naturally; each layer needs to be polished and leveled after solidification.

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