PU-FC runway material with high mechanical strength and preparation method thereof
By introducing modified polyacrylonitrile fibers and water-based fluorocarbon coatings into polyurethane running track materials, the problem of low mechanical strength of polyurethane running track materials has been solved, and the tensile properties, wear resistance, and waterproof performance of the materials have been improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG SHENGTIAN SPORT CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional polyurethane running track materials have low mechanical strength and are prone to damage and cracking during long-term use, which affects their service life.
By introducing modified polyacrylonitrile fibers into polyurethane track materials, and using dicyclohexylcarbodiimide and 4-dimethylaminopyridine catalysts to introduce urethane groups onto the fiber surface, the fibers are blended with prepolymer and curing agent components to improve the compatibility and interfacial bonding between the fibers and polyurethane. Finally, a water-based fluorocarbon coating is sprayed onto the material surface for thermosetting.
It significantly improves the tensile properties, Shore A hardness, and tear strength of polyurethane running track materials, while also enhancing the material's abrasion resistance and waterproof performance.
Smart Images
Figure BDA0005380197330000031 
Figure BDA0005380197330000081
Abstract
Description
Technical Field
[0001] This invention relates to the field of polyurethane technology, specifically to a high-mechanical-strength PU-FC runway material and its preparation method. Background Technology
[0002] Polyurethane possesses excellent elasticity, impact resistance, abrasion resistance, and aging resistance, and is widely used in plastics, running tracks, and sports equipment. Traditional polyurethane materials for running tracks suffer from low mechanical strength, leading to damage and cracking over long-term use, thus reducing their lifespan. Improving the mechanical properties of polyurethane materials for running tracks is a hot research topic, typically achieved by adding inorganic fillers and polymer fibers.
[0003] Polyacrylonitrile fibers possess excellent weather resistance, mechanical strength, and modulus, and are widely used in materials such as plastics, rubber, and concrete. Patent CN108017897B discloses a polyacrylonitrile nanofiber membrane / thermoplastic polyurethane composite material and its preparation method. Using a polyacrylonitrile nanofiber membrane as reinforcement, the thermoplastic polyurethane composite material prepared by impregnation exhibits high tensile strength, elongation, and toughness. However, ordinary polyacrylonitrile fibers have poor compatibility with polyurethane, making it difficult to effectively utilize the reinforcing effect of the fibers. Summary of the Invention
[0004] This invention solves the problem of low mechanical properties of polyurethane running track materials.
[0005] The technical solution of the present invention: a high mechanical strength PU-FC running track material and its preparation method: the PU-FC running track material includes high mechanical strength PU polyurethane running track material and FC waterborne fluorocarbon coating;
[0006] High-strength PU polyurethane running track material includes a prepolymer component and a curing agent component; the prepolymer component includes 100 parts by weight of polyether polyol and 90-130 parts by weight of isocyanate compound; the curing agent component includes 140-165 parts by weight of polyether polyol, 6-12 parts by weight of chain extender, 15-30 parts by weight of plasticizer, 1.4-1.8 parts by weight of catalyst, 20-40 parts by weight of filler, and 2-8 parts by weight of modified polyacrylonitrile fiber.
[0007] The preparation method of high mechanical strength PU-FC runway material is as follows:
[0008] (1) The dry polyether polyol and isocyanate compound are reacted in a nitrogen atmosphere at 70-80℃ for 2-3 hours, cooled and discharged to obtain the prepolymer component.
[0009] (2) Mix polyether polyol, chain extender, plasticizer, catalyst, filler and modified polyacrylonitrile fiber, grind evenly to obtain curing agent component; then mix curing agent component and prepolymer component, quickly pour into mold, cure at 20-35℃ for 18-24h to obtain high mechanical strength PU polyurethane runway material.
[0010] (3) The FC waterborne fluorocarbon coating is sprayed onto the surface of the high mechanical strength PU polyurethane track material and thermo-cured to obtain the high mechanical strength PU-FC track material.
[0011] Preferably, the isocyanate compound is toluene diisocyanate or diphenylmethane diisocyanate.
[0012] Preferably, the chain extender is 1,4-butanediol, 1,6-hexanediol, or diethanolamine.
[0013] Preferably, the catalyst is any one or a combination of lead isooctanoate or phenylmercuric acetate.
[0014] Preferably, the plasticizer is 2-ethyl phthalate, dioctyl phthalate, or dibutyl phthalate.
[0015] Preferably, the filler is calcium carbonate, talc, or montmorillonite.
[0016] Preferably, the method for preparing modified polyacrylonitrile fiber is as follows:
[0017] (1) Add polyacrylonitrile fiber to a sodium hydroxide aqueous solution with a mass fraction of 7-12%, heat to 60-80℃, react for 10-15 minutes, add hydrochloric acid to adjust the pH to 5-6, filter, wash with water, and dry to obtain hydrolyzed polyacrylonitrile fiber.
[0018] (2) Add N-Boc-serine alcohol and benzyl isocyanate in a molar ratio of 1:(2-2.2) to dichloromethane, react at 30-40℃ for 4-6 h, rotary evaporate, wash with petroleum ether, add the intermediate to dichloromethane, add trifluoroacetic acid dropwise, react at 20-25℃ for 5-8 h, add sodium bicarbonate aqueous solution, shake, allow to stand for layering, remove the aqueous phase, collect the dichloromethane extract, rotary evaporate, recrystallize the product in ethanol to give 2-amino-1,3-propanedi(benzyl carbamate). The reaction formula is:
[0019]
[0020] (3) Add 100 parts by weight of hydrolyzed polyacrylonitrile fiber, 6-20 parts by weight of 2-amino-1,3-propanediol (benzyl carbamate), 3.8-12.6 parts by weight of dicyclohexylcarbodiimide, and 0.4-1.2 parts by weight of 4-dimethylaminopyridine to N,N-dimethylformamide, heat to 70-85℃, stir and react for 3-8 hours, filter, wash with ethanol and water in sequence, and dry to obtain modified polyacrylonitrile fiber.
[0021] The beneficial technical effects of this invention are as follows: Dicyclohexylcarbodiimide and 4-dimethylaminopyridine are used as catalysts to react the carboxyl groups on the surface of hydrolyzed polyacrylonitrile fibers with the amino groups of 2-amino-1,3-propanediol (benzyl carbamate), thereby introducing a large number of urethane groups on the surface of polyacrylonitrile fibers. Finally, the mixture is blended and cured with prepolymer and curing agent components to obtain high mechanical strength PU polyurethane running track material.
[0022] The modified polyacrylonitrile fiber of this invention contains a large number of urethane groups on its surface, which makes the polyacrylonitrile fiber and polyurethane have good compatibility. The polyacrylonitrile fiber is uniformly dispersed in the polyurethane material. At the same time, the urethane groups, carboxyl groups, amide bonds, etc. on the surface of the polyacrylonitrile fiber have strong hydrogen bond interactions with the polyurethane, which improves the interfacial bonding force between the two and enables the polyacrylonitrile fiber to play a better reinforcing role, significantly improving the tensile properties, Shore A hardness and tear strength of the polyurethane material.
[0023] This invention allows for the spraying of a water-based fluorocarbon coating onto the surface of PU polyurethane running track material, followed by baking and thermosetting to obtain PU-FC running track material, which can improve the wear resistance, waterproofing, and other properties of the running track material. Detailed Implementation
[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to examples. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0025] The following polyether polyol, model HSH-330N, was purchased from Nantong Qinruiyang Chemical Co., Ltd. The polyacrylonitrile fiber, model TC-PAN-06, 6mm, was purchased from Shandong Taicheng Fiber Co., Ltd. The FC waterborne fluorocarbon coating, model HF-7211, was purchased from Guangdong Hongfang Coatings Co., Ltd.
[0026] Example 1:
[0027] (1) Add 50g of polyacrylonitrile fiber to 2.5L of 7% sodium hydroxide aqueous solution, heat to 70℃, react for 10min, add hydrochloric acid to adjust pH to 5, filter, wash with water, and dry to obtain hydrolyzed polyacrylonitrile fiber.
[0028] (2) Add 40 mmol N-Boc-serine alcohol and 80 mmol benzyl isocyanate to 100 mL of dichloromethane, react at 30 °C for 6 h, evaporate by rotary evaporation, wash with petroleum ether, add the intermediate to 120 mL of dichloromethane, add 60 mL of trifluoroacetic acid dropwise, react at 20 °C for 8 h, add sodium bicarbonate aqueous solution, shake and let stand to separate the layers, remove the aqueous phase, collect the dichloromethane extract, evaporate by rotary evaporation, recrystallize the product in ethanol to obtain 2-amino-1,3-propanedi(benzyl carbamate).
[0029] (3) Add 50g of hydrolyzed polyacrylonitrile fiber, 3g of 2-amino-1,3-propanediol (benzyl carbamate), 1.9g of dicyclohexylcarbodiimide, and 0.2g of 4-dimethylaminopyridine to 2L of N,N-dimethylformamide. Heat to 70℃, stir and react for 6h, filter, wash with ethanol and water in sequence, and dry to obtain modified polyacrylonitrile fiber.
[0030] (4) 1 kg of dry polyether polyol and 1.3 kg of diphenylmethane diisocyanate were reacted in a nitrogen atmosphere at 70 °C for 3 h, and then cooled and discharged to obtain the prepolymer component.
[0031] (5) Mix 1.65 kg of polyether polyol, 92 g of chain extender 1,4-butanediol, 220 g of plasticizer phthalic acid (2-ethyl ester), 9 g of catalyst lead isooctanoate, 9 g of phenylmercuric acetate, 400 g of filler calcium carbonate, and 20 g of modified polyacrylonitrile fiber, grind them evenly to obtain the curing agent component; then mix the curing agent component and the prepolymer component, quickly pour them into the mold, and cure at 25°C for 24 h to obtain high mechanical strength PU polyurethane running track material.
[0032] Example 2:
[0033] (1) Add 50g of polyacrylonitrile fiber to 2L of sodium hydroxide aqueous solution with a mass fraction of 12%, heat to 60℃, react for 15min, add hydrochloric acid to adjust the pH to 6, filter, wash with water, and dry to obtain hydrolyzed polyacrylonitrile fiber.
[0034] (2) Add 40 mmol N-Boc-serine alcohol and 88 mmol benzyl isocyanate to 120 mL of dichloromethane, react at 30 °C for 6 h, evaporate by rotary evaporation, wash with petroleum ether, add the intermediate to 120 mL of dichloromethane, add 80 mL of trifluoroacetic acid dropwise, react at 25 °C for 5 h, add sodium bicarbonate aqueous solution, shake and let stand to separate the layers, remove the aqueous phase, collect the dichloromethane extract, evaporate by rotary evaporation, recrystallize the product in ethanol to obtain 2-amino-1,3-propanedi(benzyl carbamate).
[0035] (3) Add 50g of hydrolyzed polyacrylonitrile fiber, 6.5g of 2-amino-1,3-propanediol (benzyl carbamate), 4g of dicyclohexylcarbodiimide, and 0.3g of 4-dimethylaminopyridine to 2.5L N,N-dimethylformamide, heat to 70℃, stir and react for 8h, filter, wash with ethanol and water in sequence, and dry to obtain modified polyacrylonitrile fiber.
[0036] (4) 1 kg of dry polyether polyol and 0.9 kg of toluene diisocyanate were reacted in a nitrogen atmosphere at 80 °C for 2 h, and then cooled and discharged to obtain the prepolymer component.
[0037] (5) Mix 1.4 kg of polyether polyol, 60 g of chain extender diethanolamine, 150 g of plasticizer dioctyl phthalate, 7 g of catalyst lead isooctanoate, 7 g of phenylmercuric acetate, 200 g of filler montmorillonite, and 50 g of modified polyacrylonitrile fiber, grind them evenly to obtain the curing agent component; then mix the curing agent component and the prepolymer component, quickly pour them into the mold, and cure at 35°C for 18 h to obtain high mechanical strength PU polyurethane running track material.
[0038] Example 3:
[0039] (1) Add 50g of polyacrylonitrile fiber to 2.5L of 10% sodium hydroxide aqueous solution, heat to 80℃, react for 10min, add hydrochloric acid to adjust pH to 6, filter, wash with water, and dry to obtain hydrolyzed polyacrylonitrile fiber.
[0040] (2) Add 40 mmol N-Boc-serine alcohol and 88 mmol benzyl isocyanate to 100 mL of dichloromethane, reflux at 40 °C for 4 h, evaporate by rotary evaporation, wash with petroleum ether, add the intermediate to 150 mL of dichloromethane, add 80 mL of trifluoroacetic acid dropwise, react at 20 °C for 6 h, add sodium bicarbonate aqueous solution, shake and let stand to separate the layers, remove the aqueous phase, collect the dichloromethane extract, evaporate by rotary evaporation, recrystallize the product in ethanol to obtain 2-amino-1,3-propanedi(benzyl carbamate).
[0041] (3) Add 50g of hydrolyzed polyacrylonitrile fiber, 10g of 2-amino-1,3-propanediol (benzyl carbamate), 6.3g of dicyclohexylcarbodiimide, and 0.6g of 4-dimethylaminopyridine to 3L of N,N-dimethylformamide. Heat to 85℃, stir and react for 3h, filter, wash with ethanol and water in sequence, and dry to obtain modified polyacrylonitrile fiber.
[0042] (4) 1 kg of dry polyether polyol and 1.2 kg of diphenylmethane diisocyanate were reacted in a nitrogen atmosphere at 75°C for 3 h, and then cooled and discharged to obtain the prepolymer component.
[0043] (5) Mix 1.6 kg of polyether polyol, 120 g of chain extender 1,6-hexanediol, 300 g of plasticizer dibutyl phthalate, 8.4 g of catalyst lead isooctanoate, 8.4 g of phenylmercuric acetate, 280 g of filler talc, and 80 g of modified polyacrylonitrile fiber, grind them evenly to obtain the curing agent component; then mix the curing agent component and the prepolymer component, quickly pour them into the mold, and cure at 20°C for 24 h to obtain high mechanical strength PU polyurethane running track material.
[0044] Comparative Example 1:
[0045] (1) 1 kg of dry polyether polyol and 1.3 kg of diphenylmethane diisocyanate were reacted in a nitrogen atmosphere at 70 °C for 3 h, and then cooled and discharged to obtain the prepolymer component.
[0046] (2) Mix 1.65 kg of polyether polyol, 92 g of chain extender 1,4-butanediol, 220 g of plasticizer phthalic acid (2-ethyl ester), 9 g of catalyst lead isooctanoate, 9 g of phenylmercuric acetate, and 400 g of filler calcium carbonate, grind them evenly to obtain the curing agent component; then mix the curing agent component and the prepolymer component, quickly pour them into the mold, and cure at 25°C for 24 h to obtain PU polyurethane running track material.
[0047] Comparative Example 2:
[0048] (1) 1 kg of dry polyether polyol and 1.3 kg of diphenylmethane diisocyanate were reacted in a nitrogen atmosphere at 70 °C for 3 h, and then cooled and discharged to obtain the prepolymer component.
[0049] (2) Mix 1.65 kg of polyether polyol, 92 g of chain extender 1,4-butanediol, 220 g of plasticizer phthalic acid (2-ethyl ester), 9 g of catalyst lead isooctanoate, 9 g of phenylmercuric acetate, 400 g of filler calcium carbonate, and 20 g of polyacrylonitrile fiber, grind them evenly to obtain the curing agent component; then mix the curing agent component and the prepolymer component, quickly pour them into the mold, and cure at 25°C for 24 h to obtain PU polyurethane running track material.
[0050] Comparative Example 3:
[0051] (1) 1 kg of dry polyether polyol and 1.3 kg of diphenylmethane diisocyanate were reacted in a nitrogen atmosphere at 70 °C for 3 h, and then cooled and discharged to obtain the prepolymer component.
[0052] (2) 1.65 kg of polyether polyol, 92 g of chain extender 1,4-butanediol, 220 g of plasticizer phthalic acid (2-ethyl ester), 9 g of catalyst lead isooctanoate, 9 g of phenylmercuric acetate, 400 g of filler calcium carbonate, and 20 g of hydrolyzed polyacrylonitrile fiber (prepared from Example 1) were stirred and mixed, and ground evenly to obtain the curing agent component; then the curing agent component and the prepolymer component were stirred and mixed, and quickly poured into a mold and cured at 25°C for 24 h to obtain PU polyurethane running track material.
[0053] Comparative Example 4
[0054] (1) Add 50g of hydrolyzed polyacrylonitrile fiber (prepared from Example 1), 3g of benzylamine, 1.9g of dicyclohexylcarbodiimide and 0.2g of 4-dimethylaminopyridine to 2L of N,N-dimethylformamide, heat to 70°C, stir and react for 6h, filter, wash with ethanol and water in sequence, and dry to obtain modified polyacrylonitrile fiber.
[0055] (2) 1 kg of dry polyether polyol and 1.3 kg of diphenylmethane diisocyanate were reacted in a nitrogen atmosphere at 70 °C for 3 h, and then cooled and discharged to obtain the prepolymer component.
[0056] (3) Mix 1.65 kg of polyether polyol, 92 g of chain extender 1,4-butanediol, 220 g of plasticizer phthalic acid (2-ethyl ester), 9 g of catalyst lead isooctanoate, 9 g of phenylmercuric acetate, 400 g of filler calcium carbonate, and 20 g of modified polyacrylonitrile fiber, grind them evenly to obtain the curing agent component; then mix the curing agent component and the prepolymer component, quickly pour them into the mold, and cure at 25°C for 24 h to obtain PU polyurethane running track material.
[0057] The tensile properties of polyurethane running track materials were tested according to GB / T 528-2009 standard. The hardness was tested according to GB / T 531.1-2008 standard. The tear strength was tested according to GB / T 529-2008 standard.
[0058] Table 1 Performance Tests of Polyurethane Track Materials
[0059]
[0060] After testing, compared with Comparative Example 1, the polyurethane running track materials in Examples 1-4 incorporated modified polyacrylonitrile fibers. These fibers have a large number of urethane groups on their surface, which are the same as the urethane groups in polyurethane. This results in good compatibility between the polyacrylonitrile fibers and polyurethane. The polyacrylonitrile fibers are uniformly dispersed in the polyurethane material. At the same time, the urethane groups, carboxyl groups, amide bonds, etc. on the surface of the polyacrylonitrile fibers have strong hydrogen bond interactions with the polyurethane, which improves the interfacial bonding force between the two. This allows the polyacrylonitrile fibers to play a better reinforcing role and significantly improves the tensile properties, Shore A hardness, and tear strength of the polyurethane material.
[0061] Comparative Example 2 incorporated ordinary polyacrylonitrile fibers, which have poor compatibility with polyurethane materials, resulting in low interfacial forces and poor reinforcement of the polyurethane by the polyacrylonitrile fibers, leading to low mechanical properties of the material. Comparative Example 3 incorporated hydrolyzed polyacrylonitrile fibers, which do not contain urethane groups, exhibiting poor compatibility with polyurethane and poor reinforcement of the polyurethane, resulting in low mechanical properties of the material. Comparative Example 4 involved reacting benzylamine with hydrolyzed polyacrylonitrile fibers. The resulting modified polyacrylonitrile fibers do not contain urethane groups, exhibiting poor compatibility with polyurethane and poor reinforcement of the polyurethane, resulting in low mechanical properties of the material.
[0062] The present invention also provides the following embodiments:
[0063] Example 4:
[0064] FC waterborne fluorocarbon coating was sprayed onto the surface of high mechanical strength PU polyurethane running track material (prepared by Example 1), and then baked and cured at 80°C for 2 hours, and then baked and cured at 125°C for 3 hours to obtain high mechanical strength PU-FC running track material.
[0065] Example 5:
[0066] FC waterborne fluorocarbon coating was sprayed onto the surface of high mechanical strength PU polyurethane running track material (prepared by Example 2), and then baked and cured at 80°C for 2 hours, and then baked and cured at 130°C for 2 hours to obtain high mechanical strength PU-FC running track material.
[0067] Example 6:
[0068] FC waterborne fluorocarbon coating was sprayed onto the surface of high mechanical strength PU polyurethane running track material (prepared by Example 2), and then baked and cured at 90°C for 1 hour, and then baked and cured at 120°C for 3 hours to obtain high mechanical strength PU-FC running track material.
[0069] By spraying water-based fluorocarbon coatings onto the surface of PU polyurethane running track materials, the wear resistance and waterproof properties of PU polyurethane materials can be improved.
[0070] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A PU-FC running track material, characterized in that, The PU-FC track material includes high mechanical strength PU polyurethane track material and FC waterborne fluorocarbon coating. The high mechanical strength PU polyurethane running track material includes a prepolymer component and a curing agent component; The prepolymer component includes 100 parts by weight of polyether polyol and 90-130 parts by weight of isocyanate compound; The curing agent components include 140-165 parts by weight of polyether polyol, 6-12 parts by weight of chain extender, 15-30 parts by weight of plasticizer, 1.4-1.8 parts by weight of catalyst, 20-40 parts by weight of filler, and 2-8 parts by weight of modified polyacrylonitrile fiber; The modified polyacrylonitrile fiber is prepared by adding hydrolyzed polyacrylonitrile fiber, 2-amino-1,3-propanediol (benzyl carbamate), dicyclohexylcarbodiimide, and 4-dimethylaminopyridine to N,N-dimethylformamide, stirring and reacting, filtering, washing, and drying to obtain the modified polyacrylonitrile fiber. The preparation method of 2-amino-1,3-propanediol (benzyl carbamate) is as follows: N-Boc-serine alcohol and benzyl isocyanate are added to dichloromethane in a molar ratio of 1:(2-2.2), and the mixture is reacted at 30-40℃ for 4-6 h. After rotary evaporation and washing, the intermediate is added to dichloromethane, and trifluoroacetic acid is added dropwise. The mixture is reacted at 20-25℃ for 5-8 h, and an aqueous solution of sodium bicarbonate is added. After extraction, the product is recrystallized in ethanol to obtain 2-amino-1,3-propanediol (benzyl carbamate).
2. The PU-FC running track material according to claim 1, characterized in that, The isocyanate compound is toluene diisocyanate or diphenylmethane diisocyanate.
3. The PU-FC running track material according to claim 1, characterized in that, The chain extender is 1,4-butanediol, 1,6-hexanediol, or diethanolamine; the catalyst is any one or a combination of lead isooctanoate or phenylmercuric acetate.
4. The PU-FC running track material according to claim 1, characterized in that, The plasticizer is 2-ethyl phthalate, dioctyl phthalate, or dibutyl phthalate.
5. The PU-FC running track material according to claim 1, characterized in that, The filler is calcium carbonate, talc, or montmorillonite.
6. The PU-FC running track material according to claim 1, characterized in that, The amount of hydrolyzed polyacrylonitrile fiber is 100 parts by weight, 2-amino-1,3-propanediol (benzyl carbamate) is 6-20 parts by weight, dicyclohexylcarbodiimide is 3.8-12.6 parts by weight, and 4-dimethylaminopyridine is 0.4-1.2 parts by weight.
7. The PU-FC running track material according to claim 1, characterized in that, In the preparation method of the modified polyacrylonitrile fiber, the reaction temperature is 70-85℃ and the reaction time is 3-8h.
8. The PU-FC running track material according to claim 1, characterized in that, The preparation method of the hydrolyzed polyacrylonitrile fiber is as follows: add polyacrylonitrile fiber to a sodium hydroxide aqueous solution with a mass fraction of 7-12%, heat to 60-80℃, react for 10-15 minutes, add hydrochloric acid to adjust the pH to 5-6, filter, wash with water, and dry to obtain hydrolyzed polyacrylonitrile fiber.
9. A method for preparing PU-FC runway material as described in any one of claims 1-8, characterized in that, The preparation method is as follows: (1) The dry polyether polyol and isocyanate compound are reacted in a nitrogen atmosphere at 70-80℃ for 2-3 hours, cooled and discharged to obtain the prepolymer component; (2) Mix polyether polyol, chain extender, plasticizer, catalyst, filler and modified polyacrylonitrile fiber, grind evenly to obtain curing agent component; then mix curing agent component and prepolymer component, quickly pour into mold, cure at 20-35℃ for 18-24h to obtain high mechanical strength PU polyurethane running track material; (3) The FC waterborne fluorocarbon coating is sprayed onto the surface of the high mechanical strength PU polyurethane track material and thermo-cured to obtain the PU-FC track material.