Preparation and testing method and application of bionic energy-absorbing ground mat

Abstract

According to the bionic energy-absorbing floor mat, PVC or TPU serves as a surface layer to be compounded with an ACF energy-absorbing material prepared by mixing a component A and a component B or mixing a component C and the component B, the ACF energy-absorbing material simulates the molecular structure design of cartilage, a brush-shaped structure is manufactured through chemical reaction, a testing method is provided, and five-level evaluation system standards are established: the grade of 5A is lower than 50G, the grade of 4A is lower than 50G, and the grade of 4A is lower than 65G. The 65G to 100G is in a 3A level, the 115G to 115G is in a 2A level, and the 115G to 130G is in a 1A level. The ACF energy-absorbing material is compounded with the PVC surface layer, so that the requirements of the surface layer on skid resistance, hydrolysis resistance, easy cleaning performance and energy-absorbing and impact resistance of the whole structure are perfectly met, the composite material can be laid on occasions such as toilets, kitchens and the like which are easy to smudge, wet and slippery floors and easy to fall down, and application situations such as ground falling resistance are really realized.

Description

Technical Field

[0001] This invention belongs to the field of protective materials technology, specifically relating to the preparation, testing method and application of a biomimetic energy-absorbing floor mat. Background Technology

[0002] Existing nursing homes, welfare homes, schools, hospitals, and sports training grounds such as wrestling, judo, and karate are places where falls and physical contact with the ground frequently occur, which can easily cause impact injuries to the human body, but the ground does not have protective functions.

[0003] Current ground protection solutions mainly include two types: wood flooring and high-polymer PVC materials. Wood flooring is gradually becoming less popular due to environmental concerns related to deforestation and its limited energy absorption. Furthermore, wood flooring is complex to install, requires a large space (generally 5-15 cm in height), is difficult to clean, and is prone to moisture absorption and rot, making it unsuitable for kitchens, bathrooms, and other similar locations. In nursing homes, schools, hospitals, home kitchens, bathrooms, and other places with high foot traffic and a high risk of falls, where the floor is frequently exposed to water stains, oil stains, garbage, and medical waste requiring urgent cleaning, there is a need for protective flooring that is both easy to clean and has energy absorption properties.

[0004] As a chemical product, PVC (polyvinyl chloride) has become a popular choice for floor protection due to its relatively low price and ease of processing. PVC flooring can be seen in many places, such as school classrooms and offices. However, its linear polymer structure has limitations in energy absorption. While its initial performance is good, it declines over time. Furthermore, it can provide some cushioning for small impacts, but its energy absorption capacity becomes insufficient once the impact exceeds a certain threshold. In nursing homes or sports arenas, the impact of a fall may not be effectively reduced to a safe level by PVC materials, increasing the probability of injury for the elderly or athletes.

[0005] While adding PVC fillers can increase hardness and improve energy absorption, the bond between the polymer and inorganic fillers is not strong. During long-term use, repeated pressure and friction can cause the fillers to separate from the polymer matrix, leading to poor fatigue resistance and insufficient protection after prolonged use. PVC foam materials have good energy absorption, but the monotonous linearity of the matrix material makes them prone to compressive fatigue failure, with cell collapse causing energy absorption failure. Therefore, it is necessary to further improve the overall protective performance of the material. Summary of the Invention

[0006] This invention aims to develop a floor mat with high energy absorption and protective properties for use in places with frequent personnel activity and high requirements for ground safety, such as nursing homes, welfare homes, schools, and hospitals, as well as sports training venues. The focus is on the construction of a multi-layer composite structure, optimization of production processes, and testing methods to achieve effective protection of the human body under different impact conditions, while meeting the requirements of easy cleaning, environmental protection, and durability.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: A biomimetic energy-absorbing floor mat includes a surface layer, characterized in that the surface layer is a PVC surface layer or a TPU surface layer, and the surface layer is coated or adhered with ACF energy-absorbing material; The ACF energy-absorbing material is prepared by mixing component A and component B, or by mixing component C and component B. Component A, by weight, comprises 25-70 parts of polyol type 1, 20-70 parts of bio-based polyol, 5-10 parts of 3-allyloxy-1,2-propanediol, 0.1-0.5 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.1-0.5 parts of organobismuth catalyst, 0.1-0.5 parts of Y10366, and 1-5 parts of 1,4-butanediol; Component A is stored separately in a first constant-temperature container at 25-30 degrees Celsius. Component B comprises, by weight, 20-50 parts of diammonium carbide modified MDI and 50-80 parts of prepolymer-modified MDI; The prepolymer-modified MDI is a prepolymer with an NCO% content between 18% and 22% generated by a prepolymerization reaction of isocyanate and polyol type 1; the isocyanate is pure MDI; the pure MDI is a mixture of 4,4-diphenylmethane diisocyanate and 2,4-diphenylmethane diisocyanate, wherein the 4,4-diphenylmethane diisocyanate content reaches 97% to 99.5%.

[0008] The NCO content of the carbodiimide-modified MDI is 29-31%; Component B should be stored separately in a second constant-temperature container at 25-30 degrees Celsius; Component C comprises, by weight, 10–60 parts of polyol type 1, 20–70 parts of polyol type 2, 12–20 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 0.3–1 part of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol; Component C is stored separately in a third constant-temperature container at 25–30 degrees Celsius. The ratio of the number of moles of hydroxyl groups in component A or component C to the number of moles of isocyanate groups in component B is 100:(85-110).

[0009] Furthermore, the polyol type 1 is a polyether polyol with a molecular weight of 3000-7000 and a functionality of 2-3; the polyol type 2 is a polyether polyol with a molecular weight of 400-1000 and a functionality of 2-3; and the bio-based polyol has a hydroxyl value of 112-240 mgKOH / g. Furthermore, components C and A also include one or more of the following: antioxidants, UV absorbers, antifungal and antibacterial agents, flame retardants, coupling agents, smoke inhibitors, pigments, antistatic agents, diluents, surface wetting agents, leveling agents, thixotropic agents, and plasticizers.

[0010] Furthermore, components C and A also contain one or more fillers selected from microcapsules, glass fibers, hollow glass microspheres, rubber elastic particles, carbon nanotubes, aluminum hydroxide, melamine, calcium carbonate, talc, barium sulfate, titanium dioxide, diatomaceous earth, kaolin, rare earth, nano silica, and negative ion powder.

[0011] The preparation of a biomimetic energy-absorbing floor mat is characterized by comprising the following steps: S1. Prepare component A and component B, and store them in the first and second constant temperature containers respectively; S2. Close the first three-way valve and the second three-way valve, and start the first drive motor connected to the first frequency converter and the second drive motor connected to the second frequency converter respectively. Component A of the first constant temperature tank enters the pump connected to the first drive motor from the discharge port along the pipeline, and then returns to the first return port through the first three-way valve. Component B of the second constant temperature tank enters the pump connected to the second drive motor from the discharge port along the pipeline, and then returns to the second return port through the second three-way valve. Component B returns to the second constant temperature tank. S3. Open the first three-way valve and the second three-way valve respectively. Component A from the first thermostatic tank enters the pump connected to the first drive motor through the pipe from the discharge port, and then enters the mixing head through the first three-way valve. Component B from the second thermostatic tank enters the pump connected to the second drive motor through the pipe from the discharge port, and then enters the mixing head through the second three-way valve. By controlling the ratio of the speed of the metering pump connected to the first drive motor (connected to the first frequency converter) to the speed of the metering pump connected to the second drive motor (connected to the second frequency converter), the mixing ratio of component A and component B is controlled. For example, a high-speed mixture is performed at a ratio of -OH to -NCO of 100:(85~110), with a mixing speed of 5000~10000 rpm and a mixing time of 0.1~0.3s. Only by strictly controlling this ratio can the full reaction of component A and component B be ensured, forming the ideal chemical structure and physical properties. There is a delay between the opening of the first and second three-way valves, which is between 0.1-0.3s. This delay is not superfluous; it plays a crucial role in ensuring accurate mixing ratios. In actual operation, due to the pressure and flow rate in the pipeline and the structural influence of the mixing head, simultaneously opening the three-way valve may lead to inaccurate mixing ratios of component A and component B in the initial stage. By setting this delay time, the flow rates and pressures of components A and B can reach a stable state before entering the mixing head, thereby ensuring precise mixing according to the set ratio in the mixing head. S4. Spray a release agent into the inner cavity of the molding mold, pour the mixture into the square molding mold, the molding temperature of the mold is 60~70℃, after the mold is closed and locked, the reaction is cured to form a foam, the locking pressure is 0.8Mpa, the mold curing time is 20~25min; after the foam is removed from the mold, it is cured at room temperature for 24h, the foam is cut into sheets by a flat cutter, and multiple sheets are bonded end to end by welding or gluing and rolled into ACF rolls; Alternatively, the mixture is poured into a cylindrical molding mold and rotated and foamed to form a foam body. The rotation speed is 5-20 RPM, the molding temperature of the mold is 50-60℃, and after the mold is closed and locked, the reaction is cured to form a foam body. The mold locking pressure is 1.5 MPa, and the mold curing time is 15-25 minutes. After the foam body is removed from the mold, it is cured at room temperature for 24 hours. Then, the foam body is cut by a circular cutter and rolled into ACF rolls. Alternatively, the mixture is poured into a long strip forming mold and cured to form a foam. The molding temperature of the mold is 40~50℃, and the reaction curing process forms a foam for 30~40 minutes. After the foam is removed from the mold, it is cured at room temperature for 24 hours. The foam is then cut into long sheets by a flat cutter. Multiple sheets are then bonded together end to end by welding or gluing and rolled into ACF rolls. After the foam is formed, it needs to undergo subsequent processing such as cutting and lamination to create the final biomimetic sports mat. The cutting method varies depending on the mold in which the foam is formed. If the foam is formed in a square mold, it is cut into sheets of a certain thickness using a flat cutter. If it is formed in a cylindrical mold, it is cut into rolls of the desired shape and size using a circular cutter. If it is formed in a long strip mold, it is also cut into long sheets using a flat cutter. The cut sheets need to be bonded and rolled up. Multiple sheets are bonded end-to-end using either fusion welding or adhesive bonding. Welding involves heating the edges of the sheets to melt them and then joining them together, resulting in a stronger bond that is less prone to separation. Adhesive bonding uses special adhesive to bond the sheets together; this method is relatively simple, but requires selecting a suitable adhesive to ensure bonding strength and durability. The bonded sheets are then rolled into ACF rolls for subsequent lamination processes. Circularly cut roll material is the preferred option; S5. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper. The above is the surface layer. Then, it is bonded to the ACF roll material to create a biomimetic energy-absorbing floor mat. Alternatively, a continuous coating machine can be used to coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer in sequence. The above forms the surface layer. Then, it is bonded to the ACF roll material using an adhesive method. After that, a transfer printing layer, a PVC transparent layer, and a PUR treatment layer are produced to create a biomimetic energy-absorbing floor mat. Alternatively, a continuous coating machine can be used to coat the release paper with a wear-resistant layer, a reinforcing layer, a fiberglass layer, and a bonding layer in sequence. The top layer is then bonded to the ACF roll material using an adhesive method. Finally, a PVC transparent layer and a PUR treated layer are produced to create a biomimetic energy-absorbing floor mat. S6. Conduct impact resistance tests on the biomimetic energy-absorbing floor mat, measure the impact acceleration G value during impact, and determine the cushioning performance of the biomimetic energy-absorbing floor mat by the magnitude of the G value.

[0012] The preparation of a biomimetic energy-absorbing floor mat is characterized by comprising the following steps: S11. Prepare component C and component B, and store them in the third and second constant temperature containers respectively. S12. Close the third three-way valve and the second three-way valve, and start the third drive motor connected to the third frequency converter and the second drive motor connected to the second frequency converter respectively. Component C of the third constant temperature tank enters the pump connected to the third drive motor from the discharge port along the pipeline, and then returns to the third return port through the third three-way valve. Component C returns to the third constant temperature tank. Component B of the second constant temperature tank enters the pump connected to the second drive motor from the discharge port along the pipeline, and then returns to the second return port through the second three-way valve. Component B returns to the second constant temperature tank. S13. Open the third three-way valve, the second three-way valve, and the check valve respectively. Component C from the third constant temperature tank enters the third pump through the pipeline from the outlet, then passes through the third three-way valve and enters the mixing head. Component B from the second constant temperature tank enters the pump connected to the third drive motor from the outlet through the pipeline, then passes through the second three-way valve and enters the mixing head. Air or nitrogen is injected into the mixing head through a high-pressure gas nozzle connected to the mixing head via a gas pipe and a check valve after the flow rate is controlled by a gas flow meter. The speed of the metering pump connected to the third drive motor (connected to the third frequency converter) and the metering pump connected to the second drive motor (connected to the second frequency converter) are controlled by the speed control of the third frequency converter. The pump speed is adjusted to control the mixing ratio of component C and component B, with a ratio of -OH to -NCO of 100:(85~110), forming a mixture. The mixing speed is 300-500 rpm, and the mixing time is 3-5 seconds. Only by strictly controlling this ratio can the full reaction of component C and component B be ensured, forming the ideal chemical structure and physical properties. There is a delay between the opening time of the first and second three-way valves, which is between 0.1-0.3 seconds. This delay is not superfluous; it plays a crucial role in ensuring accurate mixing ratios. In actual operation, due to the pressure and flow rate in the pipeline and the structural influence of the mixing head, opening the three-way valves simultaneously may lead to inaccurate mixing ratios of component C and component B in the initial stage. By setting this delay time, the flow rates and pressures of components C and B can reach a stable state before entering the mixing head, thus ensuring that they can be accurately mixed in the mixing head according to the set ratio. The function of the one-way valve is to allow air to be injected into the mixing head only from the bulk flow meter end, but the mixture in the mixing head cannot flow back into the gas flow meter through the one-way valve. This can prevent the mixture in the mixing head from flowing back into the bulk gas flow meter and damaging the gas flow meter when the gas pressure at the gas source end is unstable or can be cut off. S14. The mixture is introduced into the nozzle through the guide pipe. The nozzle is connected to the slide table, and the nozzle slide table is connected to the fixed bracket. The fixed bracket is respectively equipped with a first limit switch and a second limit switch. The positions of the first limit switch and the second limit switch correspond to the left and right sides of the scraping to control the scraping width. The mixture is poured evenly into the scraping material tank through the nozzle using the nozzle slide table in a reciprocating swinging motion. Then, it is evenly scraped onto the bonding layer of the surface layer by a scraper. After being baked in an oven at 80-120℃, it is cured at room temperature for 24 hours to produce a biomimetic sports mat. The surface layer is manufactured by a continuous scraping machine by sequentially coating a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a bonding layer on release paper.

[0013] The relationship between the reciprocating speed of the slide, the speed of the refractory material, the speed of the air injection, the width of the coating, the speed of the coating line, the foaming ratio and the thickness of the coating is shown in Table 3 below.

[0014] S15. Conduct impact resistance testing on the biomimetic energy-absorbing floor mat, measure the impact acceleration G value during impact, and determine the cushioning performance of the biomimetic energy-absorbing floor mat by the magnitude of the G value.

[0015] A testing method for a biomimetic energy-absorbing floor mat, characterized by comprising the following steps: S21. The biomimetic energy-absorbing floor mat is placed on the ground, which is a cement floor or a wooden floor with a joist. S22. A rubber sheet is placed on the biomimetic energy-absorbing floor mat, and the rubber sheet simulates human skin and muscle tissue. S23. Fix the simulated human head hammer test component to the adjustment rod of the test bracket, and adjust the height of the adjustment rod to keep the simulated human head hammer test component at a distance of 20cm from the rubber plate. S24. Move the test stand. The hammer test component is located at test point D1 on the protective mat. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is disengaged from the adjustment rod of the test stand. During the first impact test, after the accelerometer measures the peak impact acceleration G1 at the time of impact, reset the hammer test component according to step S23. S25. Move the test stand. The hammer test component is located at test point D2 on the protected ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is separated from the adjustment rod of the test stand. During the second impact test, after the accelerometer measures the peak impact acceleration G2 at the time of impact, reset the hammer test component according to step S23. S26. Move the test stand. The hammer test component is located at test point D3 on the protected ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is separated from the adjustment rod of the test stand. During the third impact test, after the accelerometer measures the peak impact acceleration G3 at the time of impact, reset the hammer test component according to step S23. S47. Move the test stand. The hammer test component is located at test point D4 on the protective ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is disengaged from the adjustment rod of the test stand. During the fourth impact test, after the accelerometer measures the peak impact acceleration G4 at the time of impact, reset the hammer test component according to step S23. S28. Move the test stand. The hammer test component is located at test point D5 on the protective ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head separates from the adjustment rod of the test stand. During the fifth impact test, the accelerometer is used to measure the peak impact acceleration G5 at the time of impact, so that five impact tests can be completed at different positions of one bionic energy-absorbing mat. S29. Calculate the average value G_avg of the peak impact accelerations G1, G2, G3, G4, and G5 obtained from the five impact tests, in G, where G = 9.8 m / s². 2 Based on the average value G_avg, the protection level of the biomimetic energy-absorbing floor mat is determined according to the following five-level evaluation system: 5A level: G_avg ≤50; 4A level: 50 < G_avg ≤ 65; 3A level: 65 < G_avg ≤ 100; Level 2A: 100 < G_avg ≤ 115 Grade 1A: 115 < G_avg ≤ 130.

[0016] Furthermore, the weight of the weighted hammer testing component is 4.2 kg. According to relevant research, the average head weight for adult men in northern China is 4.9 kg, and for women in southern China it is 4.1 kg, with an average of 4.5 kg. Elderly individuals may experience a slight reduction in head weight due to brain atrophy, approximately 5%-10%. Studies have also shown that elderly women are more prone to fractures due to physiological reasons. To verify the research's validity, this invention selected a batch of male and female samples of various heights, body types, and weights, measuring the average head weight in sleeping positions, which was 4.253 kg. Considering all these factors, the weighted hammer testing component was set at 4.2 kg ± 0.1 kg. See Table 4 below for detailed data statistics.

[0017] Furthermore, the hammer test assembly has a hollow structure, with an impact part at one end and a connecting part at the other end. The accelerometer is fixedly installed inside the hammer cavity. An electromagnetic component connected to a switch is installed on the adjusting rod. The electromagnetic component cooperates with the connecting part of the hammer test assembly, and the electromagnetic component controls the hammer test assembly to be fixed or separated from the test bracket.

[0018] Furthermore, the rubber sheet has a thickness of 8 mm, a hardness of Shore A type 37, and a density between 1 and 1.3 g / cm3.

[0019] A biomimetic energy-absorbing floor mat is applied in protective fields such as nursing homes, welfare homes, schools, and hospitals where people frequently move around and where there are safety requirements for the ground, as well as in the field of sports training venues.

[0020] The beneficial effects of this invention are as follows: (1) The molding process and testing method of the biomimetic energy-absorbing floor mat material provided by the present invention differ from the prior art in that the main chain is formed by the first reaction of polyol type 1 and polyol type 2 with isocyanate, the second reaction is formed by 3-allyloxy-1,2-propanediol with isocyanate, and the third reaction is formed by 1,4-butanediol with isocyanate. Then the first, second and third reactions are alternately reacted to generate a block-shaped brush-like side chain structure with a large number of side branches. In particular, 3-allyloxy-1,2-propanediol, since one of the hydroxyl groups is not at the end of the molecular chain, has a large number of side groups in the final molecular structure generated after reacting with isocyanate. Furthermore, the short chain structure of polyol type 2 forms a stable molecular structure. When the molecular structure is impacted, it will absorb a large amount of energy through the internal friction of the molecular chain, thereby reducing the impact force. This comprehensively improves the safety, environmental protection and service life of the floor mat, and is suitable for a variety of high protection requirements, with good application prospects. The PVC surface layer maintains wear-resistant, non-slip, and easy-to-clean properties. The foam layer uses the material of this invention, whose unique molecular structure (urethane repeating units, wide molecular weight distribution, and brush-like side chain structure) can exhibit strain rate-sensitive nonlinear mechanical characteristics. It remains soft and comfortable during walking and absorbs a large amount of energy through small deformations during high-speed impacts such as falls and collisions, effectively reducing the peak impact force to below the human safety threshold and preventing serious injuries such as fractures and concussions.

[0021] (2) Multi-layer material combination and fusion: The brush-like molecular structure design mimicking cartilage achieves nonlinear mechanical response; the closed-mold foaming process controls the porosity to 50%, such as 2-3 times foaming to form a gas-solid coupling structure; the addition of organic / inorganic fillers, such as microcapsules, glass fibers, carbon nanotubes, etc., enhances energy dissipation; surfactants regulate the stability of bubbles in the foaming reaction to achieve effective control of the ratio of open and closed pores and the pore size distribution. The appropriate ratio of open and closed pores and the pore size distribution allow the gas-solid coupling effect to be fully utilized. The gas and polyurethane solid in the pores interact. During impact, the gas first buffers, and the material matrix absorbs energy through deformation. The reasonable ratio of open and closed pores further enhances energy dispersion and material stability, and the material performance is improved to 97.1% energy absorption efficiency, achieving wide-range large energy absorption.

[0022] (3) This invention, through testing methods and scientific calculations, mainly involves acceleration G and impact force N. The energy absorption parameters of the ACF energy-absorbing material are obtained after testing and comparison, establishing a five-level evaluation system standard: less than 50G is level 5A, 50-65G is level 4A, 65-100G is level 3A, 100-115G is level 2A, 115-130G is level 1A, and above 130G is considered unqualified. To ensure the standard better meets actual protection needs, the weight of the simulated hammer in the head mold is set to 4.2Kg. In age-friendly renovations, products ranging from 1A to 5A are selected based on the physical condition of the target population. When consumers choose floor mats, they first undergo bone density and muscle strength tests. For individuals with normal bone density and good health, 1-2A grade products are recommended; for those with low osteoporosis and bone density, 3A grade energy-absorbing floor mats are recommended; for those with moderate osteoporosis and bone density, 4A grade energy-absorbing floor mats are recommended; and for those with high osteoporosis and bone density and poor lower limb stability, 5A grade energy-absorbing floor mats are recommended. By constructing a scientific evaluation system, consumers can more intuitively choose energy-absorbing floor mats based on their own conditions, providing targeted and effective protection for the head and hips, and helping to reduce the risk of fractures.

[0023] (4) The ACF energy-absorbing material is combined with the PVC surface layer, which perfectly solves the requirements of surface anti-slip performance, hydrolysis resistance, easy cleaning performance and overall structure energy absorption and impact resistance. This allows the composite material to be laid in bathrooms, kitchens and other places where the floor is easy to get dirty, slippery and easy to fall, and truly achieves the protection of the floor from falls.

[0024] (5) The ACF material has very stable compression resistance, which solves the problem of severe deformation of PVC foam material after long-term compression, improves the service life of the protective pad, provides longer protection, and indirectly solves social problems such as recycling and management after the material is discarded. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the biomimetic sports mat structure provided by the present invention; Figure 2 A schematic diagram of the pipeline flow direction before mixing and preparing components A and B according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the preparation of a block-locking foaming molding device after mixing components A and B according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram illustrating the preparation of a cylindrical molding die foaming device after mixing components A and B according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the preparation of a foaming molding device for a long strip forming mold after mixing components A and B according to an embodiment of the present invention.

[0028] Figure 6 A schematic diagram of the pipeline flow direction before mixing and preparing components C and B according to an embodiment of the present invention; Figure 7 This is a schematic diagram illustrating the preparation of a mixture of component C and component B by scraping in an embodiment of the present invention. Figure 8 This is a schematic diagram of the test structure of the biomimetic energy-absorbing floor mat provided by the present invention; Figure 9 This is a diagram of compressive stress-strain of ACF material at different strain rates.

[0029] Figure 10 This is a schematic diagram showing the sample test results of head gravity in a sleeping position. In the diagram: 1. First three-way valve; 2. Second three-way valve; 3. Mixing head; 4. First frequency converter; 5. Second frequency converter; 6. First drive motor; 7. Second drive motor; 8. First constant temperature tank; 9. Second constant temperature tank; 10. Third constant temperature tank; 11. Third three-way valve; 12. Third frequency converter; 13. Third drive motor; 14. Square forming mold; 15. Guide pipe; 16. Nozzle; 17. Slide table; 18. Fixed bracket; 19. First limit switch; 20. Second limit switch; 21. Paint scraper trough; 22. Air pump; 23. Gas flow meter; 24. Cylindrical forming mold; 25. Strip forming mold; 26. One-way valve; 27. Scraper; 28. Rubber plate; 29. ​​Weight test assembly; 291. Connecting part; 292. Impact part; 30. Accelerometer; 31. Adjusting rod; 32. Switch; 33. Test bracket; 34. Bionic energy-absorbing mat; 35. Ground; 36. Oven. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] As described in Examples 1-12: The bio-based polyol is soybean oil polyol T-13220 produced by Guangzhou Haierma Vegetable Oil Co., Ltd., with a hydroxyl value of 240mgKOH / g, and belongs to vegetable oil-based polyols.

[0032] The polyether polyol type 1 is polyether polyol CHE-330N produced by Jiangsu Changhua Polyurethane Co., Ltd., with a hydroxyl value of 35mgKOH / g.

[0033] The polyether polyol type 2 is polypropylene glycol PPG-1000 from Jiangsu Haian Petrochemical Plant, with a hydroxyl value of 112 mgKOH / g.

[0034] The 1,4-butanediol mentioned is a chain extender, manufactured by BASF.

[0035] Y10366 and L626 are silicone surfactants from Momentive Advanced Materials Inc., Inc.

[0036] The thermosensitive catalyst is CUCAT-RM90 produced by Guangzhou Yourun Synthetic Materials Co., Ltd.

[0037] The organic bismuth catalyst is BCAT-E16 produced by Guangzhou Yourun Synthetic Materials Co., Ltd.

[0038] The molecular structure of 3-allyloxy-1,2-propanediol is as follows:

[0039] The carbodiimide-modified MDI is Wannate 1631, with an NCO content of 29.75%.

[0040] The pure MDI is Wannate MDI100, 4,4-MDI produced by Wanhua, with a content of ≥97%.

[0041] The specific preparation method of the prepolymer-modified MDI is as follows: Pure MDI is melted at 45°C, then polyol type 1 is added, the stirring speed is 300 RPM, and the temperature is raised to 70-80°C for 2-3 hours to form a prepolymer-modified MDI with an end-NCO group content of 18-22%. Specifically, the 18% NCO content prepolymer-modified MDI, by weight, consists of 75 parts polyol 1 and 100 parts pure MDI; the 22% NCO content prepolymer-modified MDI, by weight, consists of 45 parts polyol 1 and 100 parts pure MDI. The prepared prepolymer-modified MDI is stored under nitrogen gas to prevent deterioration from contact with moisture in the air.

[0042] The PVC surface layer uses environmentally friendly polyvinyl chloride resin as the base material, combined with bio-based plasticizers, heat stabilizers, anti-aging agents, and other additives, and is manufactured through calendering or extrusion molding. It conforms to GB / T 4085-2015 "General Technical Requirements for Polyvinyl Chloride Flooring" and international standards such as ISO 4586-2. The average thickness of the PVC surface layer is 2.0mm, with a thickness deviation controlled within ±0.1mm; the Shore A hardness is 75~85HA, balancing support and foot comfort; the tensile strength is ≥15Mpa, and the elongation at break is ≥100%, capable of withstanding deformation from daily walking and minor impacts without breaking. The PVC surface layer has excellent anti-slip properties, hydrolysis resistance, and easy cleaning performance, making it suitable for commercial public areas (such as shopping malls and offices), ordinary indoor residential areas, and other cost-sensitive scenarios with moderate usage intensity. It is especially suitable for decorative scenarios requiring rich color printing.

[0043] The TPU surface layer uses thermoplastic polyurethane elastomer as the base material, and its performance is optimized through physical blending modification or chemical functionalization modification. Polyether-type or polyester-type soft segments are selected to adapt to different usage environments, meeting the core technical requirements for elastic materials used in floor mats. Different soft segment ratios are selected according to the application scenario: 70-80% soft segments for high-elasticity scenarios (such as children's activity areas), and ≤50% soft segments for high abrasion-resistant scenarios. The surface layer thickness is 2.0mm, with a Shore A hardness of 65-80HA and a number-average molecular weight of 50,000-100,000, ensuring excellent elastic recovery. The TPU surface layer is suitable for scenarios with higher requirements for elasticity, abrasion resistance, and weather resistance, such as nursing homes, children's activity areas, sports fields, damp environments (bathrooms, swimming pools), and outdoor terraces. It can also be used in high-end applications with stringent environmental performance requirements, such as medical and early childhood education institutions.

[0044] The test method for the compressive deformation rate of the biomimetic energy-absorbing floor mat is as follows: First, the floor mat material to be tested is placed at room temperature (23 degrees Celsius) for 24 hours. Then, a 50*50 mm sample is taken and its thickness is measured, recorded as H0 (in mm). Next, the floor mat material is pre-compressed to 30% thickness using a flat clamping device, placed in a constant temperature chamber at 70 degrees Celsius for 22 hours, removed, and placed at room temperature (23 degrees Celsius) for 24 hours. The thickness of the floor mat material is measured again and recorded as H1 (in mm). The compressive deformation rate is calculated using the following formula: Example

[0045] like Figures 1-3 As shown, this embodiment discloses a biomimetic energy-absorbing mat, including a PVC surface layer, on which an ACF energy-absorbing material is adhered. The ACF energy-absorbing material is prepared by mixing components A and B. Component A, by weight, includes 25 parts of polyol type 1, 70 parts of bio-based polyol, 5 parts of 3-allyloxy-1,2-propanediol, 0.2 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.1 parts of organic bismuth catalyst, 0.5 parts of Y10366, and 5 parts of 1,4-butanediol. Component A is stored separately in a first constant temperature container 8 at 25 degrees Celsius. Based on actual usage requirements, Component A also includes one or more of the following: antioxidants, UV absorbers, antifungal and antibacterial agents, flame retardants, coupling agents, smoke suppressants, pigments, antistatic agents, diluents, surface wetting agents, leveling agents, thixotropic agents, and plasticizers. Component A also contains one or more inorganic fillers selected from microcapsules, glass fibers, hollow glass microspheres, rubber elastic particles, and carbon nanotubes. Component A is stored separately in a first constant-temperature container at 25-30 degrees Celsius. The special core-shell structure of the microcapsules absorbs energy through plastic deformation upon impact; glass fibers act as a skeletal support in the polyurethane matrix, preventing crack propagation; hollow glass microspheres increase material strength without adding excessive weight, and their hollow internal structure absorbs energy; elastic particles absorb energy through elastic deformation, enhancing the material's flexibility; and carbon nanotubes form a network structure in the polyurethane matrix, enhancing the material's mechanical properties and energy conduction capabilities.

[0046] The B component comprises, by weight, 20 parts of carbide-modified MDI and 80 parts of prepolymer-modified MDI with 22% NCO content. The B component is stored separately in a second constant-temperature container 9 at 25 degrees Celsius.

[0047] The preparation of the biomimetic energy-absorbing floor mat in this embodiment includes the following steps: S1. Prepare component A and component B, and store them in the first constant temperature container 8 and the second constant temperature container 9, respectively. S2. Close the first three-way valve 1 and the second three-way valve 2, and start the first drive motor 6 connected to the first frequency converter 4 and the second drive motor 7 connected to the second frequency converter 5 respectively. Component A of the first constant temperature tank 8 enters the pump connected to the first drive motor 6 through the pipeline from the discharge port, and then returns to the first return port through the first three-way valve 1. Component B of the second constant temperature tank 9 enters the pump connected to the second drive motor 7 through the pipeline from the discharge port, and then returns to the second return port through the second three-way valve 2. Component B returns to the second constant temperature tank 9. S3. Open the first three-way valve 1 and the second three-way valve 2 respectively. Component A from the first thermostatic tank 8 enters the pump connected to the first drive motor 6 through the pipe from the discharge port, and then enters the mixing head 3 through the first three-way valve 1. Component B from the second thermostatic tank 9 enters the pump connected to the second drive motor 7 through the pipe from the discharge port, and then enters the mixing head 3 through the second three-way valve 2. Control the speed ratio of the metering pump connected to the first drive motor 6 connected to the first frequency converter 4 and the metering pump connected to the second drive motor 7 connected to the second frequency converter 5, thereby controlling the mixing ratio of component A and component B. For example, component A and component B are mixed at a high-speed ratio of -OH to -NCO of 100:85, at a speed of 10,000 rpm for 0.1 seconds to form a mixture. Only by strictly controlling this ratio can the full reaction of component A and component B be ensured, resulting in the desired chemical structure and physical properties. There is a delay between the opening times of the first and second three-way valves, ranging from 0.1 to 0.3 seconds. This delay is not superfluous; it plays a crucial role in ensuring accurate mixing ratios. In actual operation, due to the pressure and flow rate in the pipeline, as well as the structural influence of the mixing head, simultaneously opening the three-way valves may lead to inaccurate mixing ratios of component A and component B in the initial stage. By setting this delay time, the flow rates and pressures of components A and B can reach a stable state before entering the mixing head, thus ensuring precise mixing according to the set ratio within the mixing head. S4. A release agent is sprayed into the inner cavity of the molding mold. The mixture is poured into the square molding mold 14, and after mold closing and locking, it reacts and matures to form a foam. The molding temperature is 70℃, the mold clamping pressure is 0.8 MPa, and the mold closing and maturation time is 20 minutes. After the foam is removed from the mold, it continues to cure at room temperature for 24 hours. The foam is then cut into sheets using a flat cutter, and multiple sheets are bonded end-to-end using a welding method and rolled into ACF rolls. This formulation uses 3-allyloxy-1,2-propanediol. Because one of the hydroxyl groups is not at the end of the molecular chain, the final molecular structure formed after reacting with isocyanate has a large number of side groups. Due to the presence of these numerous side groups, coupled with the urethane structure formed by the reaction of polyol and isocyanate, a large molecule with a wide molecular weight distribution and a brush-like side chain structure is formed. This special molecular structure makes the ACF material exhibit strain rate-sensitive mechanical characteristics when subjected to impact. When subjected to slow compression, the forces between molecular chains are relatively weak, resulting in a soft material that provides a comfortable feel. However, under high-speed impact, the molecular chains rapidly rearrange and deform, with side chains also participating in the energy absorption process. This enhances intermolecular interactions, forming a near-rigid structure capable of absorbing a large amount of energy through minimal deformation, reducing the peak impact force below a safe threshold for the human body and effectively preventing serious injuries such as fractures and concussions. During the foaming process, the precise matching of foaming agent and surfactant dosages controls the opening and closing of pores. Combined with the clamping pressure, this creates a gas-solid coupling structure within the material, with pore sizes distributed in a gradient within the matrix, further enhancing the material's energy absorption capacity and cushioning performance. S5. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper. The above is the surface layer. Then, it is bonded to the ACF roll material to create a biomimetic energy-absorbing floor mat. S6. The impact resistance performance of the bionic energy-absorbing floor mat was tested. The impact acceleration G value during impact was measured. The buffering performance of the bionic energy-absorbing floor mat was determined by the magnitude of the G value. The test data are shown in Table 1 and Table 2. Example 2

[0048] like Figures 1-3 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components A and B. Component A, by weight, comprises 34 parts of polyol type 1, 60 parts of bio-based polyol, 6 parts of 3-allyloxy-1,2-propanediol, 0.3 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.15 parts of organobismuth catalyst, 0.4 parts of Y10366, and 3 parts of 1,4-butanediol. Component A is stored separately in a first constant-temperature container 8 at 30 degrees Celsius. The B component comprises, by weight, 25 parts of diammonium carbide modified MDI and 75 parts of prepolymer-modified MDI with 22% NCO content. The B component is stored separately in a second constant-temperature container 9 at 29 degrees Celsius.

[0049] The high-speed mixing ratio of component A and component B is 100:90 (-OH to -NCO ratio), with a high-speed mixing speed of 10,000 rpm and a high-speed mixing time of 0.1 s. The mixture is poured into a square molding mold 14 at a molding temperature of 60°C, a mold clamping pressure of 0.8 MPa, and a mold-closing curing time of 20 min. After the foam is removed from the mold, it continues to cure at room temperature for 24 h. The foam is then cut into sheets using a flat cutter, and multiple sheets are bonded end-to-end using adhesive bonding and rolled into ACF rolls. A continuous coating machine is used to sequentially coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a bonding layer, forming the top layer. This top layer is then bonded to the ACF rolls using adhesive bonding to create a biomimetic energy-absorbing floor mat. Other parts not described are the same as in Embodiment 1. Example 3

[0050] like Figures 1-2 and Figure 5 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components A and B. Component A, by weight, comprises 23 parts of polyol type 1, 50 parts of bio-based polyol, 7 parts of 3-allyloxy-1,2-propanediol, 0.1 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.2 parts of organobismuth catalyst, 0.3 parts of Y10366, and 2.5 parts of 1,4-butanediol. Component A is stored separately in a first constant-temperature container 8 at 25 degrees Celsius. The B component comprises, by weight, 30 parts of diammonium carbide modified MDI and 70 parts of prepolymer-modified MDI with 22% NCO content. The B component is stored separately in a second constant-temperature container 9 at 27 degrees Celsius.

[0051] The high-speed mixing ratio of component A and component B is 100:95 (-OH to -NCO ratio), with a high-speed mixing speed of 5000 rpm and a high-speed mixing time of 0.1 s. The mixture is poured into a long strip forming mold and cured to form a foam. The molding temperature of the mold is 40℃, and the curing time is 30 minutes. After the foam is removed from the mold, it is cured at room temperature for 24 hours. The foam is then cut into sheets using a flat cutter, and multiple sheets are bonded together end to end using an adhesive method and rolled into ACF rolls. A continuous coating machine is used to sequentially coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer, forming the top layer. This top layer is then bonded to the ACF rolls using an adhesive method to create a biomimetic energy-absorbing floor mat. Other parts not described are the same as in Embodiment 1. Example 4

[0052] like Figures 1-2 , Figure 5 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components A and B. Component A, by weight, comprises 52 parts of polyol type 1, 40 parts of bio-based polyol, 8 parts of 3-allyloxy-1,2-propanediol, 0.15 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.3 parts of organobismuth catalyst, 0.3 parts of Y10366, and 2 parts of 1,4-butanediol. Component A is stored separately in a first constant-temperature container 8 at 25 degrees Celsius. The B component comprises, by weight, 35 parts of carbide-modified MDI and 65 parts of prepolymer-modified MDI with 22% NCO content. The B component is stored separately in a second constant-temperature container 9 at 26 degrees Celsius.

[0053] The high-speed mixing ratio of component A and component B is 100:100 (-OH to -NCO), with a mixing speed of 5000 rpm and a mixing time of 0.1 s. The mixture is poured into a long strip forming mold and cured to form a foam. The molding temperature of the mold is 50°C, and the curing time is 40 minutes. After the foam is removed from the mold and cured at room temperature for 24 hours, the foam is cut into sheets using a flat cutter. Multiple sheets are then bonded together end to end using adhesive and rolled into ACF rolls. A continuous coating machine is used to sequentially coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer, forming the top layer. These layers are then bonded together with the ACF rolls using adhesive to create a biomimetic energy-absorbing floor mat. Other parts not described are the same as in Embodiment 1. Example 5

[0054] like Figures 1-2 and Figure 4As shown, this embodiment discloses a biomimetic sports mat, including a surface layer, which is a TPU surface layer. The preparation of the TPU surface layer with ACF material bonded to it includes the following steps: Prepare a mixture of components A and B. Component A, by weight, comprises 61 parts of polyol type 1, 30 parts of bio-based polyol, 9 parts of 3-allyloxy-1,2-propanediol, 0.4 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.4 parts of organobismuth catalyst, 0.2 parts of Y10366, and 1.5 parts of 1,4-butanediol. Component A is stored separately in a first constant-temperature container 8 at 25 degrees Celsius. The B component comprises, by weight, 40 parts of carbide-modified MDI and 60 parts of prepolymer-modified MDI with 22% NCO content. The B component is stored separately in a second constant-temperature container 9 at 30 degrees Celsius.

[0055] The high-speed mixing ratio of component A and component B is 100:105 (-OH to -NCO ratio), with a high-speed mixing speed of 5000 rpm and a high-speed mixing time of 0.2 s. The mixture is poured into a cylindrical molding mold 24. The molding temperature of the mold is 50℃, the clamping pressure is 1.5 MPa, and the mold curing time is 25 min. After the foam is removed from the mold, it continues to cure at room temperature for 24 h. The foam is then cut into sheets using a ring cutter. Multiple sheets are bonded together end to end using an adhesive method and rolled into ACF rolls. A continuous coating machine is used to sequentially coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer. This is the top layer, which is then bonded to the ACF rolls using an adhesive method to create a biomimetic energy-absorbing floor mat. Other parts not described are the same as in Embodiment 1. Example 6

[0056] like Figures 1-2 and Figure 4 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components A and B. Component A, by weight, comprises 70 parts of polyol type 1, 20 parts of bio-based polyol, 10 parts of 3-allyloxy-1,2-propanediol, 0.5 parts of water, 0.2 parts of bis(dimethylaminoethyl) ether, 0.5 parts of organobismuth catalyst, 0.1 parts of Y10366, and 1 part of 1,4-butanediol. Component A is stored separately in a first constant-temperature container 8 at 25 degrees Celsius. The B component comprises, by weight, 50 parts of diammonium carbide modified MDI and 50 parts of prepolymer-modified MDI with 22% NCO content. The B component is stored separately in a second constant-temperature container 9 at 30 degrees Celsius.

[0057] The high-speed mixing ratio of component A and component B is 100:110 (-OH to -NCO ratio), with a high-speed mixing speed of 5000 rpm and a high-speed mixing time of 0.3 s. The mixture is poured into a cylindrical molding mold 24. The molding temperature of the mold is 50℃, the clamping pressure is 1.5 MPa, and the mold curing time is 15 min. After the foam is removed from the mold, it continues to cure at room temperature for 24 h. The foam is then cut into sheets using a ring cutter. Multiple sheets are bonded together end to end using an adhesive method and rolled into ACF rolls. A continuous coating machine is used to sequentially coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer. This is the surface layer, which is then bonded to the ACF rolls using an adhesive method to create a biomimetic energy-absorbing floor mat. Other parts not described are the same as in Embodiment 1.

[0058] Example 7

[0059] like Figure 1 , Figures 6-7 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: S11. Prepare a mixture of components C and B. Component C is composed of the following parts by weight: 60 parts of polyol type 1, 20 parts of polyol type 2, 20 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 0.3 parts of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol. Component C is stored separately in a third constant temperature container at 30 degrees Celsius. The B component comprises, by weight, 50 parts of diammonium carbide modified MDI and 50 parts of prepolymer-modified MDI with 18% NCO content. The B component is stored separately in a second constant-temperature container 9 at 25 degrees Celsius.

[0060] S12. Close the third three-way valve and the second three-way valve, and start the third drive motor connected to the third frequency converter and the second drive motor connected to the second frequency converter respectively. Component C of the third constant temperature tank enters the pump connected to the third drive motor from the discharge port along the pipeline, and then returns to the third return port through the third three-way valve. Component C returns to the third constant temperature tank. Component B of the second constant temperature tank enters the pump connected to the second drive motor from the discharge port along the pipeline, and then returns to the second return port through the second three-way valve. Component B returns to the second constant temperature tank. S13. Open the third three-way valve, the second three-way valve, and the check valve respectively. Component C from the third constant temperature tank enters the third pump through the pipeline from the outlet, then passes through the third three-way valve and enters the mixing head. Component B from the second constant temperature tank enters the pump connected to the third drive motor from the outlet through the pipeline, then passes through the second three-way valve and enters the mixing head. Air or nitrogen is injected into the mixing head through a high-pressure gas nozzle connected to the mixing head via a gas pipe and a check valve, after the flow rate is controlled by a gas flow meter. The speed of the metering pump connected to the third drive motor (connected to the third frequency converter) and the speed of the metering pump connected to the second drive motor (connected to the second frequency converter) are controlled by the third frequency converter. The mixing ratio of component C and component B is controlled by adjusting the mixing speed, with a -OH to -NCO ratio of 100:110, to form a mixture. The mixing speed is 300 rpm, and the mixing time is 5 seconds. There is a delay of 0.1 seconds between the opening of the first three-way valve and the second three-way valve. The one-way valve allows air to be injected into the mixing head from the bulk flow meter in one direction only, but the mixture in the mixing head cannot flow back into the gas flow meter through the one-way valve. This prevents the mixture in the mixing head from flowing back into the bulk gas flow meter and damaging the gas flow meter in case of unstable gas pressure or gas interruption at the gas source.

[0061] S14. The mixture is introduced into the nozzle through the guide pipe. The nozzle is connected to the slide table, and the nozzle slide table is connected to the fixed bracket. The fixed bracket is respectively equipped with a first limit switch and a second limit switch. The positions of the first limit switch and the second limit switch correspond to the left and right sides of the scraping to control the scraping width. The mixture is poured evenly into the scraping material tank through the nozzle using the nozzle slide table in a reciprocating swinging manner. Then, it is evenly scraped onto the connecting layer of the surface layer by a scraper to create a biomimetic energy-absorbing floor mat. The surface layer is made by a continuous scraping machine. A wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper. The above constitutes the surface layer. Then, a mixture of components C and B is scraped onto the connecting layer on the surface layer. After baking in a 120°C oven for 36 hours, it is cured at room temperature for 24 hours. Then, a PVC transparent layer and a PUR treated layer are produced to create a biomimetic energy-absorbing floor mat. The relationship between the reciprocating speed of the slide, the speed of the refractory material, the speed of the air injection, the width of the coating, the speed of the coating line, the foaming ratio and the thickness of the coating is shown in Table 3 below.

[0062] Example 8 like Figure 1 , Figures 6-7 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: A mixture of components C and B was prepared. Component C, by weight, consisted of 58 parts of polyol type 1, 30 parts of polyol type 2, 12 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 0.4 parts of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol. Component C was stored separately in a third constant-temperature container at 25 degrees Celsius. Component B, by weight, comprises 40 parts of diammonium carbide modified MDI and 60 parts of prepolymer-modified MDI with 18% NCO content. Component B is stored separately in a second constant-temperature container 9 at 30°C. Component C and Component B are mixed in a ratio of -OH to -NCO of 100:105 to form a mixture; the mixing speed is 300 rpm and the mixing time is 5 seconds. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper, forming the top layer. Then, the mixture of Component C and Component B is further coated on the connecting layer of the top layer and baked in a 120°C oven 36 to produce a biomimetic energy-absorbing floor mat; other parts not described are the same as in Embodiment Seven.

[0063] Example 9 like Figure 1 , Figures 6-7 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components C and B. Component C, by weight, comprises 45 parts of polyol type 1, 40 parts of polyol type 2, 15 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 0.5 parts of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol. Component C is stored separately in a third constant-temperature container at 25 degrees Celsius. Component B, by weight, comprises 35 parts of diammonium carbide modified MDI and 65 parts of prepolymer-modified MDI with 18% NCO content. Component B is stored separately in a second constant-temperature container 9 at 26°C. Component C and Component B are mixed in a 100:100 ratio of -OH to -NCO to form a mixture. The mixing speed is 300 rpm and the mixing time is 5 seconds. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated onto the release paper. This forms the top layer. Then, the mixture of Component C and Component B is coated onto the connecting layer of the top layer. After baking in a 100°C oven for 36 seconds, it is cured at room temperature for 24 hours to produce a biomimetic energy-absorbing floor mat. Other parts not described are the same as in Embodiment Seven.

[0064] Example 10 like Figure 1 , Figures 6-7 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: A mixture of components C and B was prepared. Component C, by weight, consisted of 32 parts of polyol type 1, 50 parts of polyol type 2, 18 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 0.6 parts of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol. Component C was stored separately in a third constant-temperature container at 25 degrees Celsius. Component B, by weight, comprises 30 parts of diammonium carbide modified MDI and 70 parts of prepolymer-modified MDI with 18% NCO content. Component B is stored separately in a second constant-temperature container 9 at 26°C. Component C and Component B are mixed in a ratio of -OH to -NCO of 100:95 to form a mixture; the mixing speed is 500 rpm and the mixing time is 3 seconds. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper, forming the top layer. Then, the mixture of Component C and Component B is further coated onto the connecting layer of the top layer and baked in a 100°C oven for 36 seconds, followed by curing at room temperature for 24 hours to produce a biomimetic energy-absorbing floor mat; other undescribed parts are the same as in Embodiment Seven.

[0065] Example 11 like Figure 1 , Figures 6-7 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components C and B. Component C, by weight, includes 20 parts of polyol type 1, 60 parts of polyol type 2, 20 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 0.8 parts of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol. Component C is stored separately in a third constant-temperature container at 25 degrees Celsius. Component B, by weight, comprises 25 parts of diammonium carbide modified MDI and 75 parts of prepolymer-modified MDI with 18% NCO content. Component B is stored separately in a second constant-temperature container 9 at 26°C. Component C and Component B are mixed in a ratio of -OH to -NCO of 100:90 to form a mixture; the mixing speed is 500 rpm and the mixing time is 3 seconds. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper, forming the top layer. Then, the mixture of Component C and Component B is further coated onto the connecting layer of the top layer and baked in an 80°C oven for 36 seconds, followed by curing at room temperature for 24 hours to produce a biomimetic energy-absorbing floor mat; other parts not described are the same as in Embodiment Seven.

[0066] Example 12 like Figure 1 , Figures 6-7 As shown in the figure, this embodiment discloses the preparation of a biomimetic energy-absorbing floor mat, including the following steps: Prepare a mixture of components C and B. Component C, by weight, includes 10 parts of polyol type 1, 70 parts of polyol type 2, 20 parts of 3-allyloxy-1,2-propanediol, 0.05 parts of bis(dimethylaminoethyl) ether, 1.0 part of thermosensitive catalyst, 3 parts of L626, and 1 part of 1,4-butanediol. Component C is stored separately in a third constant-temperature container at 25 degrees Celsius. Component B, by weight, comprises 20 parts of diammonium carbide modified MDI and 80 parts of prepolymer-modified MDI with 18% NCO content. Component B is stored separately in a second constant-temperature container 9 at 30°C. Component C and Component B are mixed in a ratio of -OH to -NCO of 100:85 to form a mixture; the mixing speed is 500 rpm and the mixing time is 3 seconds. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper, forming the top layer. Then, the mixture of Component C and Component B is further coated on the top layer and baked in an 80°C oven for 36 seconds, followed by curing at room temperature for 24 hours to produce a biomimetic energy-absorbing floor mat; other parts not described are the same as in Embodiment Seven.

[0067] The specific parameters of the testing device, and the specific structure of the weighted test component 26, include: main body material: 45# steel, density 7.85g / cm³, total weight: 4.2kg±0.1kg (adjustable via internal counterweight cavity); impact part 292: hemispherical structure, radius 90mm, surface roughness Ra≤1.6μm; connecting part 291: cylinder with a diameter of 20mm, with electrical pure iron embedded at the end for cooperation with the electromagnetic component; accelerometer 27: an Endevco 7264 triaxial accelerometer, range ±500G, sampling rate 10kHz. The specific parameters of the testing system include: test bracket 30: constructed with 4040 aluminum profile, height adjustment range 0-1000mm; electromagnetic release device: electromagnetic component powered by DC24V, release force ≥200N; control system: PLC control, ensuring release time error <10ms; data acquisition system: NI PXIe-8840 controller, with LabVIEW software platform. Data acquisition parameter settings: Sampling frequency: 10kHz, Filtering method: 1000Hz low-pass filter, Trigger condition: Recording starts when the acceleration value exceeds 5G.

[0068] like Figures 8-9 As shown, the present invention provides a testing method for a biomimetic energy-absorbing floor mat, comprising the following steps: S21. A biomimetic energy-absorbing mat is placed on the ground 32, wherein the ground is a cement ground or a wooden floor with a joist. S22, A rubber sheet 25 is placed on top of the biomimetic energy-absorbing mat 31. The rubber sheet 25 simulates human skin and muscle tissue, has a thickness of 8 mm, a Shore A hardness of 37, and a density of 1-1.3 g / cm³. 3 between; S23. Fix the simulated human head hammer test component 26 onto the adjusting rod 28 of the test bracket 30. By adjusting the height of the adjusting rod 28, the simulated human head hammer test component 26 is kept at a distance of 20cm from the rubber plate. The weight of the hammer test component 26 is 4.2kg.

[0069] See Figure 10 As shown in Table 4, according to relevant research, the average head weight for men in the north is 4.9 kg, and for women in the south it is 4.1 kg, with an average of 4.5 kg. Due to brain atrophy and other reasons, the head weight of elderly people may decrease slightly, by about 5%-10%. Furthermore, research shows that elderly women are more prone to fractures due to physiological reasons. To verify the authenticity of the research, this invention selected a batch of male and female samples of various heights, body types, and weights, and measured the average head weight in the sleeping position, which was 4.253 kg. Considering the above factors, the weight of the hammer test component was set at 4.2 kg ± 0.1 kg. See Table 4 for detailed data statistics below:

[0070] The hammer test assembly 26 has a hollow structure. One end of the hammer test assembly 26 is provided with an impact part 292, and the other end of the hammer test assembly 26 is provided with a connecting part 291. The accelerometer 27 is fixedly installed in the inner cavity of the hammer. The adjusting rod 28 is provided with an electromagnetic component connected to the switch 29. The electromagnetic component cooperates with the connecting part 291 of the hammer test assembly 26. The electromagnetic component controls the hammer test assembly 26 to be fixed or separated from the test bracket 30.

[0071] S24. Move the test bracket 30. The hammer test assembly 26 is located at test point D1 on the protective ground. Turn on the start switch 29 of the adjustment rod 28. The hammer test assembly 26 simulating a human head is disengaged from the adjustment rod 28 of the test bracket 30. During the first impact test, after the accelerometer 27 measures the peak impact acceleration G1 during the impact, reset the hammer test assembly 26 according to step S23. S25. Move the test bracket 30. The hammer test assembly 26 is located at test point D2 on the protective ground. Turn on the start switch 29 of the adjustment rod 28. The hammer test assembly 26 simulating a human head is disengaged from the adjustment rod 28 of the test bracket 30. During the first impact test, after the accelerometer 27 measures the peak impact acceleration G2 during the impact, reset the hammer test assembly 26 according to step S23. S26. Move the test bracket 30. The hammer test assembly 26 is located at test point D3 on the protective ground. Turn on the start switch 29 of the adjustment rod 28. The hammer test assembly 26 simulating a human head is disengaged from the adjustment rod 28 of the test bracket 30. During the first impact test, after the accelerometer 27 measures the peak impact acceleration G3 during the impact, reset the hammer test assembly 26 according to step S23. S27. Move the test bracket 30. The hammer test assembly 26 is located at test point D4 on the protective ground. Turn on the start switch 29 of the adjustment rod 28. The hammer test assembly 26 simulating a human head is disengaged from the adjustment rod 28 of the test bracket 30. During the first impact test, after the accelerometer 27 measures the peak impact acceleration G4 during the impact, reset the hammer test assembly 26 according to step S23. S28, the mobile test bracket 30, the hammer test component 26 is located at test point D5 on the protective ground, the start switch 29 of the adjustment rod 28 is turned on, the hammer test component 26 simulating the human head is separated from the adjustment rod 28 of the test bracket 30. During the first impact test, the accelerometer 27 is used to measure the peak impact acceleration G5 at the time of impact. Then, five impact tests are completed at different positions of one biomimetic energy-absorbing mat, and the complete acceleration-time curve of each impact is recorded.

[0072] S29. Calculate the average value G_avg of the peak impact accelerations G1, G2, G3, G4, and G5 obtained from the five impact tests, in G, where G = 9.8 m / s². 2 Based on the average value G_avg, the protection level of the biomimetic energy-absorbing floor mat is determined according to the following five-level evaluation system: 5A level: G_avg ≤50; 4A level: 50 < G_avg ≤ 65; 3A level: 65 < G_avg ≤ 100; Level 2A: 100 < G_avg ≤ 115; Grade 1A: 115 < G_avg ≤ 130.

[0073] Extract peak acceleration values ​​G1-G5 from the acceleration-time curve. b) Calculate the average of the five tests: G_avg = (G1 + G2 + G3 + G4 + G5) / 5 c) Calculate the coefficient of variation (CV). CV should be ≤ 0.15; otherwise, retest. Analysis and testing of bone strength by scholars, covering bone mineral density tests from normal to osteoporotic, revealed that the normal femoral strength is 4649-6179 N, the femoral strength with reduced bone mass is 2928-5576 N, and the femoral strength with osteoporosis is 1409-3507 N. Experimental tests showed that the average fracture load was 3120 N, with a standard deviation of 1140 N, and a measured range of 1460 N to 5260 N. It can be concluded that the main factors influencing fractures include: the speed of the fall, the impact condition, the individual's bone mineral density, and muscle strength.

[0074] In this example, the standard values ​​for gravitational acceleration are set as follows: 50G = 50 * 9.8 m / s² = 490 m / s², 65G = 65 * 9.8 m / s² = 637 m / s², 100G = 100 * 9.8 m / s² = 980 m / s², 115G = 115 * 9.8 m / s² = 1127 m / s², and 130G = 130 * 9.8 m / s² = 1274 m / s². The weight of the hammer test component 26 is 4.2 kg. Using Newton's second law, F = m * a, where F represents the net force acting on the object (in N), m represents the mass of the object (in kg), and a represents the acceleration of the object (in m / s²). 2 Actual calculations show that: 5A grade energy-absorbing floor mat, F = 4.2 * 490 = 2058 N; 4A grade energy-absorbing floor mat, F = 4.2 * 637 = 2675 N; 3A grade energy-absorbing floor mat, F = 4.2 * 980 = 4116 N; 2A grade energy-absorbing floor mat, F = 4.2 * 1127 = 4733.4 N; Grade 1A energy-absorbing floor mat, F = 4.2 * 1274 = 5350.8 N; Through the testing methods and scientific calculations of this invention, mainly involving acceleration G-value and impact force N-value, the energy absorption parameters of ACF energy-absorbing materials are obtained after testing, and then summarized and compared. A "Correspondence Table of Protection Levels for Energy-Absorbing Cushioning Mats" is compiled. In age-friendly renovations, products of grades 1A to 5A are selected based on the physical condition of the population. When consumers choose mats, bone density and muscle strength tests are conducted first. For individuals with normal bone density and good health, grade 1-2A products are recommended; for those with low osteoporosis and bone density, grade 3A energy-absorbing mats are recommended; for those with moderate osteoporosis and bone density, grade 4A energy-absorbing mats are recommended; and for those with high osteoporosis and poor lower limb stability, grade 5A energy-absorbing mats are recommended. By constructing a scientific evaluation system, consumers can more intuitively choose energy-absorbing mats based on their own conditions, providing targeted and effective protection for the head and hip, helping to reduce the risk of fractures. Table 1 summarizes the tests conducted on the ACF energy-absorbing materials in the above embodiments, and the comparisons are as follows:

[0075] Table 2 below shows the formulation based on Example 1, except that different material thicknesses are changed to obtain different impact energy absorption effects.

[0076]

[0077] It was found that the ACF energy-absorbing materials in Examples 1-12 can achieve a level of 1A or higher when combined with a PVC surface layer at a thickness of 2MM, and the ACF at a thickness of 10MM can achieve a level of 5A, which can effectively reduce the impact damage to bones from falls.

[0078] This invention adjusts test parameters based on the measured average human head weight of 4.2 kg. A five-level evaluation system is established: less than 50g is level 5A, 50-65g is level 4A, 65-100g is level 3A, 100-115g is level 2A, and 115-130g is level 1A. To ensure the standard better meets actual protection needs, the weight of the simulated hammer on the head model is set at 4.2 kg.

[0079] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and any modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A biomimetic energy-absorbing floor mat, comprising a surface layer, characterized in that, The surface layer is a PVC surface layer or a TPU surface layer, and the surface layer is coated or pasted with ACF energy-absorbing material; The ACF energy-absorbing material is prepared by mixing component A and component B, or by mixing component C and component B. Component A, by weight, comprises 10-70 parts of polyol type 1, 20-70 parts of bio-based polyol, 20-70 parts of polyol type 2, 5-20 parts of 3-allyloxy-1,2-propanediol, 0.1-0.5 parts of water, 0.05-0.2 parts of bis(dimethylaminoethyl) ether, 0.1-0.5 parts of organobismuth catalyst, 0.1-0.5 parts of Y10366, and 1-5 parts of 1,4-butanediol; Component A is stored separately in a first constant-temperature container at 25-30 degrees Celsius. Component B comprises, by weight, 20-50 parts of diammonium carbide modified MDI and 50-80 parts of prepolymer-modified MIDI; Component B is stored separately in a second constant-temperature container at 25-30 degrees Celsius. The prepolymer-modified MDI is a prepolymer with an NCO% content between 18% and 22% generated by a prepolymerization reaction of isocyanate and polyol type 1; the isocyanate is pure MDI; the pure MDI is a mixture of 4,4-diphenylmethane diisocyanate and 2,4-diphenylmethane diisocyanate, wherein the 4,4-diphenylmethane diisocyanate content reaches 97% to 99.5%; The NCO content of the carbodiimide-modified MDI is 29-31%; The C component comprises, by weight, 10-70 parts of polyol type 1, 20-70 parts of polyol type 2, 5-20 parts of 3-allyloxy-1,2-propanediol, 0.1-0.5 parts of bis(dimethylaminoethyl) ether, 0.3-1 parts of thermosensitive catalyst, 3 parts of L626, and 1-5 parts of 1,4-butanediol; the C component is stored separately in a third constant-temperature container at 25-30 degrees Celsius. The ratio of the number of moles of hydroxyl groups in component A or component C to the number of moles of isocyanate groups in component B is 100:(85-110).

2. The biomimetic energy-absorbing floor mat according to claim 1, characterized in that: The polyol type 1 is a polyether polyol with a molecular weight of 3000-7000 and a functionality of 2; the polyol type 2 is a polyether polyol with a molecular weight of 400-1000 and a functionality of 2-3; the bio-based polyol has a hydroxyl value of 112-240 mgKOH / g and is a vegetable oil-based polyol.

3. The biomimetic energy-absorbing floor mat according to claim 1, characterized in that: The C and A components further include one or more of the following: antioxidants, UV absorbers, antifungal and antibacterial agents, flame retardants, coupling agents, smoke inhibitors, pigments, antistatic agents, diluents, surface wetting agents, leveling agents, thixotropic agents, and plasticizers.

4. The biomimetic energy-absorbing floor mat according to claim 1, characterized in that: The C and A components also contain one or more fillers selected from microcapsules, glass fiber, hollow glass microspheres, rubber elastic particles, carbon nanotubes, aluminum hydroxide, melamine, calcium carbonate, talc, barium sulfate, titanium dioxide, diatomaceous earth, kaolin, rare earth, nano silica, and negative ion powder.

5. The preparation of a biomimetic energy-absorbing floor mat as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Prepare component A and component B, and store them in the first and second constant temperature containers respectively; S2. Close the first three-way valve and the second three-way valve, and start the first drive motor connected to the first frequency converter and the second drive motor connected to the second frequency converter respectively. Component A of the first constant temperature tank enters the pump connected to the first drive motor from the discharge port along the pipeline, and then returns to the first return port through the first three-way valve. Component B of the second constant temperature tank enters the pump connected to the second drive motor from the discharge port along the pipeline, and then returns to the second return port through the second three-way valve. Component B returns to the second constant temperature tank. S3. Open the first three-way valve and the second three-way valve respectively. Component A from the first thermostatic tank enters the pump connected to the first drive motor through the pipeline from the discharge port, and then enters the mixing head through the first three-way valve. Component B from the second thermostatic tank enters the pump connected to the second drive motor through the pipeline from the discharge port, and then enters the mixing head through the second three-way valve. By controlling the ratio of the speed of the metering pump connected to the first drive motor (connected to the first frequency converter) to the speed of the metering pump connected to the second drive motor (connected to the second frequency converter), the mixing ratio of component A and component B is controlled. For example, the ratio of -OH to -NCO is 100:(85~110) and high-speed mixing is performed. The high-speed mixing speed is 5000~10000rpm and the high-speed mixing time is 0.1~0.3s. There is a delay time between the opening of the first three-way valve and the second three-way valve, which is between 0.1-0.3s. By setting this delay time, the flow rate and pressure of components A and B can reach a stable state before entering the mixing head, thereby ensuring that they can be accurately mixed in the mixing head according to the set ratio. S4. Spray a release agent into the inner cavity of the molding mold, pour the mixture into the square molding mold, the molding temperature of the mold is 60~70℃, after the mold is closed and locked, the reaction is cured to form a foam, the locking pressure is 0.8Mpa, the mold curing time is 20~25min; after the foam is removed from the mold, it is cured at room temperature for 24h, the foam is cut into sheets by a flat cutter, and multiple sheets are bonded end to end by welding or gluing and rolled into ACF rolls; Alternatively, the mixture is poured into a cylindrical molding mold and rotated and foamed to form a foam body. The rotation speed is 5-20 RPM, the molding temperature of the mold is 50-60℃, and after the mold is closed and locked, the reaction is cured to form a foam body. The mold locking pressure is 1.5 MPa, and the mold curing time is 15-25 minutes. After the foam body is removed from the mold, it is cured at room temperature for 24 hours. Then, the foam body is cut by a circular cutter and rolled into ACF rolls. Alternatively, the mixture is poured into a long strip forming mold and cured to form a foam. The molding temperature of the mold is 40~50℃, and the reaction curing process forms a foam for 30~40 minutes. After the foam is removed from the mold, it is cured at room temperature for 24 hours. The foam is then cut into long sheets by a flat cutter. Multiple sheets are then bonded together end to end by welding or gluing and rolled into ACF rolls. S5. Using a continuous coating machine, a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer are sequentially coated on the release paper. The above is the surface layer. Then, it is bonded to the ACF roll material to create a biomimetic energy-absorbing floor mat. Alternatively, a continuous coating machine can be used to coat the release paper with a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a connecting layer in sequence. The above forms the surface layer. Then, it is bonded to the ACF roll material using an adhesive method. After that, a transfer printing layer, a PVC transparent layer, and a PUR treatment layer are produced to create a biomimetic energy-absorbing floor mat. Alternatively, a continuous coating machine can be used to coat the release paper with a wear-resistant layer, a reinforcing layer, a fiberglass layer, and a bonding layer in sequence. The top layer is then bonded to the ACF roll material using an adhesive method. Finally, a PVC transparent layer and a PUR treated layer are produced to create a biomimetic energy-absorbing floor mat. S6. Conduct impact resistance tests on the biomimetic energy-absorbing floor mat, measure the impact acceleration G value during impact, and determine the cushioning performance of the biomimetic energy-absorbing floor mat by the magnitude of the G value.

6. The preparation of a biomimetic energy-absorbing floor mat as described in any one of claims 1-4, characterized in that, Includes the following steps: S11. Prepare component C and component B, and store them in the third and second constant temperature containers respectively. S12. Close the third three-way valve and the second three-way valve, and start the third drive motor connected to the third frequency converter and the second drive motor connected to the second frequency converter respectively. Component C of the third constant temperature tank enters the pump connected to the third drive motor from the discharge port along the pipeline, and then returns to the third return port through the third three-way valve. Component C returns to the third constant temperature tank. Component B of the second constant temperature tank enters the pump connected to the second drive motor from the discharge port along the pipeline, and then returns to the second return port through the second three-way valve. Component B returns to the second constant temperature tank. S13. Open the third three-way valve, the second three-way valve and the check valve respectively. Component C of the third constant temperature tank enters the third pump through the pipeline from the outlet and then enters the mixing head through the third three-way valve. Component B of the second constant temperature tank enters the mixing head through the pipeline from the outlet and then enters the pump connected to the third drive motor through the second three-way valve. Air or nitrogen is injected into the mixing head through the high-pressure gas nozzle connected to the mixing head via the gas pipe and the check valve after the flow rate is controlled by the gas flow meter. The mixing ratio of component C and component B is controlled by adjusting the speed of the metering pump connected to the third drive motor via the third frequency converter and the speed of the metering pump connected to the second drive motor via the second frequency converter. The ratio is 100:(85~110) of -OH to -NCO, forming a mixture. The mixing speed is 300-500 rpm, and the mixing time is 3-5 seconds. There is a delay between the opening time of the first three-way valve and the second three-way valve, which is between 0.1-0.3 seconds. By setting the delay time, the flow rate and pressure of components C and B can reach a stable state before entering the mixing head, thereby ensuring that they can be accurately mixed in the mixing head according to the set ratio. S14. The mixture is introduced into the nozzle through the guide pipe. The nozzle is connected to the slide table, and the nozzle slide table is connected to the fixed bracket. The fixed bracket is respectively equipped with a first limit switch and a second limit switch. The positions of the first limit switch and the second limit switch correspond to the left and right sides of the scraping to control the scraping width. The mixture is poured evenly into the scraping material tank through the nozzle using the nozzle slide table in a reciprocating swinging motion. Then, it is evenly scraped onto the bonding layer of the surface layer by a scraper. After being baked in an oven at 80-120℃, it is cured at room temperature for 24 hours to produce a biomimetic sports mat. The surface layer is manufactured by a continuous scraping machine by sequentially coating a wear-resistant layer, a reinforcing layer, a glass fiber layer, and a bonding layer on release paper. S15. Conduct impact resistance testing on the biomimetic energy-absorbing floor mat, measure the impact acceleration G value during impact, and determine the cushioning performance of the biomimetic energy-absorbing floor mat by the magnitude of the G value.

7. A testing method for the biomimetic energy-absorbing floor mat as described in claim 6, characterized in that, Includes the following steps: S21. The biomimetic energy-absorbing floor mat is placed on the ground, which is a cement floor or a wooden floor with a joist. S22. A rubber sheet is placed on the biomimetic energy-absorbing floor mat, and the rubber sheet simulates human skin and muscle tissue. S23. Fix the simulated human head hammer test component to the adjustment rod of the test bracket, and adjust the height of the adjustment rod to keep the simulated human head hammer test component at a distance of 20cm from the rubber plate. S24. Move the test stand. The hammer test component is located at test point D1 on the protected ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is separated from the adjustment rod of the test stand. During the first impact test, after the accelerometer measures the peak impact acceleration G1 at the time of impact, reset the hammer test component according to step S23. S25. Move the test stand. The hammer test component is located at test point D2 on the protected ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is separated from the adjustment rod of the test stand. During the second impact test, after the accelerometer measures the peak impact acceleration G2 at the time of impact, reset the hammer test component according to step S23. S26. Move the test stand. The hammer test component is located at test point D3 on the protected ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is separated from the adjustment rod of the test stand. During the third impact test, after the accelerometer measures the peak impact acceleration G3 at the time of impact, reset the hammer test component according to step S23. S27. Move the test stand. The hammer test component is located at test point D4 on the protective ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head is disengaged from the adjustment rod of the test stand. During the fourth impact test, after the accelerometer measures the peak impact acceleration G4 at the time of impact, reset the hammer test component according to step S23. S28. Move the test stand. The hammer test component is located at test point D5 on the protective ground. Turn on the start switch of the adjustment rod. The hammer test component simulating the human head separates from the adjustment rod of the test stand. During the fifth impact test, the accelerometer is used to measure the peak impact acceleration G5 at the time of impact, so that five impact tests can be completed at different positions of one bionic energy-absorbing mat. S29. By recording the complete acceleration-time curves for each impact, calculate the average value G_avg of the peak impact accelerations G1, G2, G3, G4, and G5 obtained from the five impact tests, in G, where G = 9.8 m / s². 2 Based on the average value G_avg, the protection level of the biomimetic energy-absorbing floor mat is determined according to the following five-level evaluation system: 5A level: G_avg ≤50; 4A level: 50 < G_avg ≤ 65; 3A level: 65 < G_avg ≤ 100; Level 2A: 100 < G_avg ≤ 115 Grade 1A: 115 < G_avg ≤ 130.

8. The testing method for a biomimetic energy-absorbing floor mat according to claim 8, characterized in that: The weight of the hammer test assembly is 4.2 kg. The hammer test assembly has a hollow structure. One end of the hammer test assembly is provided with an impact part, and the other end is provided with a connecting part. The accelerometer is fixedly installed in the inner cavity of the hammer. The adjusting rod is provided with an electromagnetic component connected to the switch. The electromagnetic component cooperates with the connecting part of the hammer test assembly. The electromagnetic component controls the hammer test assembly to be fixed or separated from the test bracket.

9. The testing method for a biomimetic energy-absorbing floor mat according to claim 8, characterized in that: The rubber sheet is 8mm thick, has a Shore A hardness of 37, and a density of 1-1.3g / cm³. 3 between.

10. The application of the biomimetic energy-absorbing floor mat according to any one of claims 1-4, characterized in that: It is applied in protective fields such as nursing homes, welfare homes, schools, and hospitals where there is frequent human activity and ground safety requirements, as well as in sports training venues.

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