A wear-resistant and environmentally friendly TPU for automotive floor mats and its preparation method

Abstract

The present application discloses a wear-resistant and environmentally friendly TPU for automotive floor mats and a preparation method thereof. The environmentally friendly TPU comprises the following raw materials in parts by weight: 20-30 parts of diisocyanate, 50-80 parts of oligomeric polyol, 30-45 parts of epoxy resin, 20-30 parts of fiber composite, 10-15 parts of hollow glass microspheres, 5-8 parts of amino silane coupling agent, and 0.5-1 part of catalyst; the fiber composite comprises carbon fiber and steel fiber, wherein the weight ratio of the carbon fiber to the steel fiber is 1:1. The wear-resistant and environmentally friendly TPU material for automotive floor mats provided by the present application has the advantages of better wear resistance and tensile strength.

Description

Technical Field

[0001] The present application relates to the technical field of automotive floor mats, and particularly to a wear-resistant and environmentally friendly TPU for automotive floor mats and a preparation method thereof. Background Art

[0002] As a choice for anti-slip gaskets, TPU materials have various advantageous properties such as elasticity, hardness, and adjustability. However, there are some problems with pure TPU materials in the application of automotive floor mats. Firstly, in terms of tensile strength. The tensile strength of pure TPU materials is relatively low and cannot fully meet the requirements of automotive floor mats in a high shear force working environment. Long-term exposure to continuous tensile and shear stresses will cause deformation and fatigue of the TPU material, reducing its service life. Secondly, there is the problem of wear resistance. The wear resistance of pure TPU materials is relatively low and it is difficult to meet the needs of long-term use of automotive floor mats. Under high-frequency friction, pure TPU materials are prone to wear, abrasion, or surface cracking, affecting their service life and anti-slip effect. These problems lead to unstable performance of automotive floor mats in a high shear working environment and even loss of anti-slip function, affecting driving safety and riding comfort. Summary of the Invention

[0003] In order to solve at least one of the above technical problems and develop a wear-resistant and environmentally friendly automotive floor mat with better tensile strength, the present application provides a wear-resistant and environmentally friendly TPU for automotive floor mats and a preparation method thereof.

[0004] In a first aspect, the present application provides a wear-resistant and environmentally friendly TPU for automotive floor mats. The environmentally friendly TPU comprises the following raw materials in parts by weight: 20 - 30 parts of diisocyanate, 50 - 80 parts of oligomeric polyol, 30 - 45 parts of epoxy resin, 20 - 30 parts of fiber composite, 10 - 15 parts of hollow glass microspheres, 5 - 8 parts of amino silane coupling agent, and 0.5 - 1 part of catalyst;

[0005] The fiber composite comprises carbon fiber and steel fiber, wherein the weight ratio of the carbon fiber to the steel fiber is 1:1.

[0006] By adopting the above technical solutions, the present application can solve the problems of poor wear resistance and tensile strength of automotive foot pads in the prior art, and provide a wear-resistant and environmentally friendly TPU for automotive foot pads with better wear resistance and tensile strength. When preparing the wear-resistant and environmentally friendly TPU for automotive foot pads in the present application, a high-performance automotive foot pad can be prepared through a specific formula. When preparing the automotive foot pad in the present application, a fiber composite and hollow glass microspheres are added, and the fiber composite is prepared by compounding carbon fiber and steel fiber. Therefore, the present application can better improve the wear resistance of the automotive foot pad by using a fiber composite composed of two components. On this basis, the present application also adds hollow glass microspheres, and the addition of hollow glass microspheres can further improve the wear resistance of the automotive foot pad, and the hollow structure of the glass microspheres can provide the automotive foot pad with strong tensile strength and a lighter weight effect. In addition, the present application adds oligomeric polyol, and the addition of oligomeric polyol can provide better tensile strength for the environmentally friendly TPU. At the same time, the raw materials used in the preparation of the automotive foot pad in the present application are all low-toxic and environmentally friendly raw materials. Therefore, the prepared automotive foot pad has the advantage of being safe and environmentally friendly.

[0007] Optionally, the environmentally friendly TPU comprises the following raw materials by weight parts: 25-30 parts of isocyanate, 65-80 parts of oligomeric polyol, 40-45 parts of epoxy resin, 25-30 parts of fiber composite, 12.5-15 parts of hollow glass microspheres, 7-8 parts of amino silane coupling agent, and 0.8-1 part of catalyst.

[0008] Optionally, the environmentally friendly TPU comprises the following raw materials by weight parts: 28 parts of isocyanate, 75 parts of oligomeric polyol, 43 parts of epoxy resin, 28 parts of fiber composite, 14 parts of hollow glass microspheres, 7.4 parts of amino silane coupling agent, and 0.9 part of catalyst.

[0009] Optionally, the environmentally friendly TPU further comprises 5-8 parts of silica.

[0010] Optionally, the silica is nano-silica; the particle size of the nano-silica is 5-10 nm.

[0011] By adopting the above technical solutions, when preparing the wear-resistant and environmentally friendly TPU for automotive foot pads in the present application, nano-silica is also added. Nano-silica has a large specific surface area and a small particle size. Therefore, the addition of nano-silica can further improve the wear resistance of the prepared automotive foot pad, and nano-silica and hollow glass microspheres can provide the automotive foot pad with strong tensile strength and wear resistance effect.

[0012] Optionally, the diameters of both the carbon fiber and the steel fiber are 5-10 microns.

[0013] Optionally, the oligomeric polyol is polycaprolactone polyol.

[0014] Optionally, the amino-silane coupling agent includes γ-aminopropyltrimethoxysilane.

[0015] Optionally, the catalyst includes triethanolamine.

[0016] In a second aspect, the present application provides a method for preparing wear-resistant and environmentally friendly TPU for automotive floor mats. The preparation method includes the following steps:

[0017] S1. Mix and react the fiber composite, hollow glass microspheres, and amino-silane coupling agent while stirring. The reaction temperature is 80 - 100 °C, and the reaction time is 20 - 30 min.

[0018] S2. Take 20 - 40% of the oligomeric polyol, mix it with epoxy resin and the material obtained in step S1, and dehydrate.

[0019] S3. Mix, react the diisocyanate, 60 - 80% of the oligomeric polyol, and the catalyst. The reaction temperature is 65 - 75 °C, and the reaction time is 1 - 2 h to obtain a polyurethane prepolymer.

[0020] S4. Mix the mixed material obtained in step S2, the polyurethane prepolymer obtained in step S3, and the remaining raw materials, and react. The reaction temperature is 80 - 90 °C, and the time is 4 - 6 h to obtain the TPU material. Press the TPU material into sheets and punch and cut it into shape to obtain the wear-resistant and environmentally friendly TPU sheet for automotive floor mats.

[0021] By adopting the above technical solutions, the present application can prepare a wear-resistant and environmentally friendly TPU for automotive floor mats with strong wear resistance and tensile strength. Moreover, the preparation method provided by the present application has the advantage of simple operation.

[0022] In summary, the present invention includes at least one of the following beneficial technical effects:

[0023] 1. This application can solve the problems of poor abrasion resistance and tensile strength of automotive floor mats in the prior art, and provides a wear-resistant and environmentally friendly TPU for automotive floor mats with better abrasion resistance and tensile strength. When preparing the wear-resistant and environmentally friendly TPU for automotive floor mats in this application, a high-performance automotive floor mat can be prepared through a specific formula. In the preparation of automotive floor mats in this application, a fiber composite and hollow glass microspheres are added. The fiber composite is prepared by compounding carbon fiber and steel fiber. Therefore, by using the fiber composite composed of two components in this application, the abrasion resistance of the automotive floor mat can be better improved. On this basis, hollow glass microspheres are also added in this application. The addition of hollow glass microspheres can further improve the wear resistance of the automotive floor mat, and the hollow structure of the glass microspheres can provide strong tensile strength and a lighter weight effect for the automotive floor mat. In addition, low molecular weight polyol is added in this application. The addition of low molecular weight polyol can provide better tensile strength for the environmentally friendly TPU. At the same time, the raw materials used in the preparation of automotive floor mats in this application are all low-toxic and environmentally friendly raw materials. Therefore, the prepared automotive floor mat has the advantage of being safe and environmentally friendly.

[0024] 3. When preparing the wear-resistant and environmentally friendly TPU for automotive floor mats in this application, nano-silica is also added. Nano-silica has a large specific surface area and a small particle size. Therefore, the addition of nano-silica can further improve the wear resistance of the prepared automotive floor mat, and nano-silica and hollow glass microspheres can provide strong tensile strength and wear resistance effect for the automotive floor mat.

[0025] 3. This application can prepare a wear-resistant and environmentally friendly TPU for automotive floor mats with strong abrasion resistance and tensile strength, and the preparation method provided by this application has the advantage of simple operation. Detailed implementation mode

[0026] The following further elaborates on this application with reference to the embodiments.

[0027] Diisocyanate: Sigma-Aldrich (Shanghai) Trading Co., Ltd.

[0028] Low molecular weight polyol: Polycaprolactone polyol, Shanghai Fuzhe Chemical Co., Ltd., purity 99%.

[0029] Bisphenol A epoxy resin: CAS No. 1675-54-3; purchased from Merck.

[0030] Carbon fiber: average diameter 5-10 microns.

[0031] Steel fiber: average diameter 5-10 microns.

[0032] Hollow glass microspheres: Shanxi Hainuo Technology Co., Ltd., purity 99%.

[0033] Aminosilane coupling agent: γ-aminopropyltrimethoxysilane; purity 98%.

[0034] Catalyst: Triethanolamine, Xingtai Xinlanxing Technology Co., Ltd., purity 99%.

[0035] Silica: Yumu (Ningbo) New Materials Co., Ltd., micron-sized silica 6 microns. Purity 99%.

[0036] Nano-silica: Yumu (Ningbo) New Materials Co., Ltd., average particle size 5 - 10 nm. Specific embodiments

[0038] Example 1

[0039] This example provides wear-resistant and environmentally friendly TPU for automotive floor mats. The environmentally friendly TPU includes the following raw materials by weight parts: 20 parts of diisocyanate, 50 parts of oligomeric polyol, 30 parts of epoxy resin, 20 parts of fiber composite, 10 parts of hollow glass microspheres, 5 parts of aminosilane coupling agent, and 0.5 part of catalyst.

[0040] The preparation method includes the following steps:

[0041] S1. Mix and react the fiber composite, hollow glass microspheres, and aminosilane coupling agent while stirring. The reaction temperature is 80°C and the reaction time is 20 min.

[0042] S2. Take 20% of the oligomeric polyol, mix it with the epoxy resin and the material obtained in step S1, and dehydrate.

[0043] S3. Mix the diisocyanate, 80% of the oligomeric polyol, and the catalyst, and react. The reaction temperature is 65°C and the reaction time is 1 h to obtain a polyurethane prepolymer.

[0044] S4. Mix the mixed material obtained in step S2 and the polyurethane prepolymer obtained in step S3, and react. The reaction temperature is 80°C and the time is 4 h to obtain the TPU material. Press the TPU material into sheets and cut it into shape to obtain the wear-resistant and environmentally friendly TPU sheet for automotive floor mats.

[0045] The catalyst in this example is triethanolamine.

[0046] The aminosilane coupling agent in this example is γ-aminopropyltrimethoxysilane.

[0047] The fiber composite is a composition of carbon fiber and steel fiber with a weight ratio of 1:1, and the average diameter of both is 5 - 10 microns.

[0048] The oligomeric polyol in this example is polycaprolactone polyol.

[0049] The epoxy resin in this example is bisphenol A epoxy resin.

[0050] Examples 2 - 5

[0051] The differences between Examples 2 - 5 and Example 1 lie in that when preparing wear-resistant and environmentally friendly TPU for automotive floor mats, the weight parts of each component are different. For the different parts, refer to Table 1.

[0052] Table 1 - Table of the Different Parts between Examples 2 - 5 and Example 1

[0053] Component Example 1 Example 2 Example 3 Example 4 Example 5 Diisocyanate 20 23 25 28 30 Oligomeric polyol 50 63 65 75 80 Epoxy resin 30 38 40 43 45 Fiber composite 20 24 25 28 30 Hollow glass microspheres 10 12 12.5 14 15 Aminosilane coupling agent 5 6.5 7 7.4 8 Catalyst 0.5 0.7 0.8 0.9 1

[0054] Comparative Examples 1 - 5

[0055] Comparative Example 1

[0056] The difference between this comparative example and Example 4 lies in that when preparing wear-resistant and environmentally friendly TPU for automotive floor mats, no fiber composite is added.

[0057] Comparative Example 2

[0058] The difference between this comparative example and Example 4 lies in that when preparing wear-resistant and environmentally friendly TPU for automotive floor mats, the fiber composite is replaced with an equal amount of carbon fiber.

[0059] Comparative Example 3

[0060] The difference between this comparative example and Example 4 lies in that when preparing wear-resistant and environmentally friendly TPU for automotive floor mats, the fiber composite is replaced with an equal amount of steel fiber.

[0061] Comparative Example 4

[0062] The difference between this comparative example and Example 4 lies in that when preparing wear-resistant and environmentally friendly TPU for automotive floor mats, no hollow glass microspheres are added.

[0063] Comparative Example 5

[0064] The difference between this comparative example and Example 4 lies in that when preparing wear-resistant and environmentally friendly TPU for automotive floor mats, neither hollow glass microspheres nor fiber composites are added.

[0065] Experimental Detection

[0066] Tensile Strength: Tested according to the method of GB / T 528 2009.

[0067] Wear Resistance Test: The wear loss is tested according to the method of ASTM D1044 2008.

[0068] For the experimental detection results of Examples 1 - 5 and Comparative Examples 1 - 5, refer to Table 2.

[0069] Table 2 - Table of the Experimental Detection Results of Examples 1 - 5 and Comparative Examples 1 - 5

[0070]

[0071]

[0072] Result analysis: The differences between Examples 2 - 5 and Example 1 lie in that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, the weight portions of each component are different. Combining the experimental test results in Table 2, it can be seen that the wear resistance and tensile strength of the wear-resistant and environmentally friendly TPU for automotive floor mats prepared in Example 4 are relatively good.

[0073] The difference between Comparative Example 1 and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, no fiber composite is added.

[0074] The difference between Comparative Example 2 and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, an equal amount of carbon fiber is used to replace the fiber composite.

[0075] The difference between Comparative Example 3 and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, an equal amount of steel fiber is used to replace the fiber composite. Combining the experimental test results of Example 4 and Comparative Examples 1 - 3, it can be seen that the fiber composite composed of two components can better improve the tensile strength and wear resistance of the prepared wear-resistant and environmentally friendly TPU for automotive floor mats.

[0076] The difference between Comparative Example 4 and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, no hollow glass microspheres are added. The difference between Comparative Example 5 and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, neither hollow glass microspheres nor fiber composites are added. Combining the experimental test results of Example 4 and Comparative Examples 4 - 5, it can be seen that when the fiber composite and hollow glass microspheres are used in combination, they can provide relatively strong tensile strength and wear resistance for the wear-resistant and environmentally friendly TPU for automotive floor mats.

[0077] Examples 6 - 9

[0078] Example 6

[0079] The difference between this example and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, the total weight of the fiber composite and hollow glass microspheres is 42 parts, and among them, the weight ratio of the fiber composite to the hollow glass microspheres is 1.8:1.

[0080] Example 7

[0081] The difference between this example and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, the total weight of the fiber composite and hollow glass microspheres is 42 parts, and among them, the weight ratio of the fiber composite to the hollow glass microspheres is 1.9:1.

[0082] Example 8

[0083] The difference between this example and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats in this example, the total weight of the fiber composite and hollow glass microspheres is 42 parts, and the weight ratio of the fiber composite to the hollow glass microspheres is 2.1:1.

[0084] Example 9

[0085] The difference between this example and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats in this example, the total weight of the fiber composite and hollow glass microspheres is 42 parts, and the weight ratio of the fiber composite to the hollow glass microspheres is 2.2:1.

[0086] Table 3 - Experimental test results table of Examples 6 - 9

[0087] Example Wear amount (mg) Tensile strength (MPa) Example 4 8.6 78.3 Example 6 8.9 77.3 Example 7 8.8 77.9. Example 8 8.3 79.2 Example 9 8.5 78.9

[0088] Result analysis: The difference between Examples 6 - 9 and Example 4 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, the total weight of the fiber composite and hollow glass microspheres is the same, while the weight ratio of the fiber composite to the hollow glass microspheres is different. Combining the experimental test data in Table 3, it can be seen that when the weight ratio of the fiber composite to the hollow glass microspheres is 2.1:1, the tensile strength and wear resistance of the wear-resistant and environmentally friendly TPU for automotive floor mats prepared are better.

[0089] Examples 10 - 13

[0090] Example 10

[0091] The difference between this example and Example 8 is that when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats, 5 parts of silica are also added.

[0092] The preparation method is as follows:

[0093] S1. Mix and react the fiber composite, hollow glass microspheres, silica and amino silane coupling agent while mixing, the reaction temperature is 80 °C, and the reaction time is 20 min;

[0094] S2. Take 20% of the oligomeric polyol, mix it with epoxy resin and the material obtained in step S1, and dehydrate;

[0095] S3. Mix, react the diisocyanate, 80% of the oligomeric polyol, and the catalyst, the reaction temperature is 65 °C, and the reaction time is 1 h to obtain a polyurethane prepolymer;

[0096] S4. Mix the mixed material obtained in step S2 with the polyurethane prepolymer obtained in step S3, and react at a reaction temperature of 80 °C for 4 h to obtain a TPU material. Laminate the TPU material into a sheet and punch it into shape to obtain the wear-resistant and environmentally friendly TPU sheet for automotive floor mats.

[0097] The silica in this example is micron-sized silica with an average particle size of 6 microns.

[0098] Example 11

[0099] The difference between this example and Example 8 is that the amount of silica in this example is 7 parts.

[0100] Example 12

[0101] The difference between this example and Example 8 is that the amount of silica in this example is 8 parts.

[0102] Example 13

[0103] The difference between this example and Example 11 is that in this example, an equal amount of nano-silica is used to replace silica. The average particle size of the nano-silica in this example is 5 - 10 nm.

[0104] The experimental test results of Examples 10 - 13 are shown in Table 4.

[0105] Table 4 - Experimental test results table of Examples 10 - 13

[0106] Example Wear amount (mg) Tensile strength (MPa) Example 8 8.3 79.2 Example 10 7.0 80.3 Example 11 6.7 80.9 Example 12 6.9 80.2 Example 13 5.3 83.4

[0107] Result analysis: The difference between Examples 10 - 13 and Example 8 is that silica is also added when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats. Combining the experimental test results in Table 4, it can be seen that the addition of silica can further improve the tensile strength and wear resistance of the prepared wear-resistant and environmentally friendly TPU for automotive floor mats.

[0108] The difference between Example 13 and Example 11 is that an equal amount of silica is used to replace nano-silica when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats. Combining the experimental test results in Table 4, it can be seen that nano-silica can further improve the tensile strength and wear resistance of the prepared TPU.

[0109] Examples 14 - 15

[0110] Example 14

[0111] The difference between this example and Example 13 is that the preparation parameters are different when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats. The different parts are as follows:

[0112] S1. Mix and react the fiber composite, hollow glass microspheres, nano-silica, and amino-silane coupling agent simultaneously. The reaction temperature is 90 °C and the reaction time is 25 min;

[0113] S2. Take 30% of the oligomeric polyol, mix it with the epoxy resin and the material obtained in step S1, and dehydrate;

[0114] S3. Mix the diisocyanate, 70% of the oligomeric polyol, and the catalyst, and react. The reaction temperature is 70 °C and the reaction time is 1.5 h to obtain a polyurethane prepolymer;

[0115] S4. Mix the mixed material obtained in step S2 and the polyurethane prepolymer obtained in step S3, and react. The reaction temperature is 85 °C and the time is 5 h to obtain the TPU material. Laminate the TPU material into a sheet and punch it into shape to obtain the wear-resistant and environmentally friendly TPU sheet for automotive floor mats.

[0116] Example 15

[0117] The difference between this example and Example 13 lies in the different preparation parameters when preparing the wear-resistant and environmentally friendly TPU for automotive floor mats. The different parts are as follows:

[0118] S1. Mix and react the fiber composite, hollow glass microspheres, nano-silica, and amino-silane coupling agent simultaneously. The reaction temperature is 100 °C and the reaction time is 30 min;

[0119] S2. Take 40% of the oligomeric polyol, mix it with the epoxy resin and the material obtained in step S1, and dehydrate;

[0120] S3. Mix the diisocyanate, 60% of the oligomeric polyol, and the catalyst, and react. The reaction temperature is 75 °C and the reaction time is 2 h to obtain a polyurethane prepolymer;

[0121] S4. Mix the mixed material obtained in step S2 and the polyurethane prepolymer obtained in step S3, and react. The reaction temperature is 90 °C and the time is 6 h to obtain the TPU material. Laminate the TPU material into a sheet and punch it into shape to obtain the wear-resistant and environmentally friendly TPU sheet for automotive floor mats.

[0122] For the experimental test results of Examples 14 - 15, see Table 5.

[0123] Table 5 - Experimental Test Results Table of Examples 14 - 15

[0124] Example <![CDATA[Wear amount (mm 3 )]]> Tensile strength (MPa) Example 13 5.3 83.4 Example 14 4.8 84.9 Example 15 5.0 84.5

[0125] Result analysis: The difference between Examples 14 - 15 and Example 13 lies in the different preparation parameters when preparing wear-resistant and environmentally friendly TPU for automotive floor mats. Combining the experimental test results in Table 5, it can be seen that the wear-resistant and environmentally friendly TPU for automotive floor mats prepared in Example 14 has better tensile strength and wear resistance.

[0126] The above are all preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A wear-resistant and environmentally friendly TPU for car mats, characterized in that: The environmentally friendly TPU comprises the following raw materials by weight: 20-30 parts of diisocyanate, 50-80 parts of oligomer polyol, 30-45 parts of epoxy resin, 20-30 parts of fiber composite, 10-15 parts of hollow glass microspheres, 5-8 parts of aminosilane coupling agent, 5-8 parts of silica and 0.5-1 part of catalyst; the fiber composite comprises carbon fiber and steel fiber, wherein the weight ratio of the carbon fiber to the steel fiber is 1:1; the weight ratio of the fiber composite to the hollow glass microspheres is 2.1:1; the silica is nano silica; the fiber composite, the hollow glass microspheres and the aminosilane coupling agent are mixed and reacted, and the mixing reaction comprises the following steps: S1, mixing and reacting the fiber composite, the hollow glass microspheres and the aminosilane coupling agent, the reaction temperature is 80-100°C, and the reaction time is 20-30min.

2. The wear-resistant and environmentally friendly TPU for car mats according to claim 1, characterized in that: The environmentally friendly TPU comprises the following raw materials by weight: 25-30 parts of isocyanate, 65-80 parts of oligomer polyol, 40-45 parts of epoxy resin, 25-30 parts of fiber composite, 12.5-15 parts of hollow glass microspheres, 7-8 parts of aminosilane coupling agent and 0.8-1 part of catalyst.

3. The wear-resistant and environmentally friendly TPU for automobile mats according to claim 1, characterized in that: The isocyanate comprises 28 parts, oligomer polyol 75 parts, epoxy resin 43 parts, fiber composite 28 parts, hollow glass microspheres 14 parts, aminosilane coupling agent 7.4 parts and catalyst 0.9 parts.

4. The wear-resistant and environmentally friendly TPU for automobile mats according to claim 1, characterized in that: The particle size of the nano silicon dioxide is 5-10 nm.

5. The wear-resistant and environmentally friendly TPU for automobile mats according to claim 1, characterized in that: The diameters of the carbon fibers and steel fibers are both 5-10 microns.

6. The wear-resistant and environmentally friendly TPU for automobile mats according to claim 1, characterized in that: The oligomer polyol is polycaprolactone polyol.

7. The wear-resistant and environmentally friendly TPU for automobile mats according to claim 1, characterized in that: The aminosilane coupling agent includes gamma-aminopropyltrimethoxysilane.

8. The wear-resistant and environmentally friendly TPU for automobile mats according to claim 1, characterized in that: The catalyst includes triethanolamine.

9. A method for preparing the wear-resistant and environmentally friendly TPU for automobile mats according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1, mixing and reacting the fiber composite, hollow glass microspheres and aminosilane coupling agent, the reaction temperature is 80-100°C, and the reaction time is 20-30min; S2, taking 20-40% of the oligomer polyol, mixing it with the epoxy resin and the material obtained in step S1, and dehydrating it; S3, mixing diisocyanate, 60-80% of oligomer polyol, and a catalyst, reacting at a reaction temperature of 65-75° C. for 1-2 hours to obtain a polyurethane prepolymer; S4, mixing the mixed material obtained in step S2, the polyurethane prepolymer obtained in step S3 and the remaining raw materials, reacting at a reaction temperature of 80-90° C. for 4-6 hours to obtain a TPU material, pressing the TPU material into a sheet, punching and forming, and obtaining the wear-resistant and environmentally friendly TPU sheet for the car mat.

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