Preparation method and application of wear-resistant EVA liner

Abstract

The invention relates to the technical field of high polymer materials, in particular to a preparation method and application of a wear-resistant EVA (Ethylene Vinyl Acetate) liner, which comprises the following steps: pretreating a filler, putting zirconium oxide and gas silicon into a high-speed solid mixer for mixing, uniformly spraying a silane coupling agent on the surface of the filler, and simultaneously stirring at a high speed; feeding the pretreated filler into a drying chamber for drying; the preparation method comprises the following steps: preparing an EVA material, mixing pretreated zirconium oxide and gas silicon with an EVA matrix according to a certain proportion, feeding the mixture into an internal mixer for uniformly mixing, and feeding a mixed product into an extruder for molding to obtain a master batch; post-treatment: placing the molded master batch at room temperature, and feeding the master batch into a drying chamber for drying; and the master batch subjected to post-treatment is fed into a slicer to be cut and sliced, then the sliced master batch is fed into a fusion splicer to be subjected to fusion splicing, and the wear-resistant EVA liner is obtained. According to the wear-resistant EVA liner prepared by the invention, the wear resistance of the EVA liner is enhanced on the premise of ensuring the flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a preparation method of a wear-resistant EVA liner and application thereof. Background Art

[0002] In the preparation process of EVA liner, its wear resistance needs to be improved according to actual use requirements. In the prior art, inorganic materials such as basic zinc carbonate, calcium carbonate, wollastonite, etc. are often used as fillers to enhance its wear resistance.

[0003] However, the interfacial bonding force between inorganic particles and EVA matrix is ​​weak, which easily leads to particle shedding and performance degradation. Therefore, it is necessary to select suitable silane coupling agents, but the selection conditions of silane coupling agents are more stringent. Different silane coupling agents have different adaptability to different inorganic particles and polymer matrices, and a large number of tests and optimizations are required to find the best combination. In addition, the amount of silane coupling agent used also needs to be strictly controlled, and too much or too little may affect the performance of the composite material. Secondly, the doping process in the prior art is relatively complicated, and the dispersion and particle size distribution of inorganic particles need to be accurately controlled to ensure their uniform distribution in the EVA material. However, it is often difficult to achieve this ideal state in actual operation, resulting in fluctuations in the performance of the composite material. Finally, while the prior art improves the wear resistance of EVA materials, it may have an adverse effect on its other properties such as flexibility, anti-aging, etc., and it is necessary to weigh and choose between performances.

[0004] Therefore, a method for preparing EVA with enhanced wear resistance and its application are now needed. Summary of the invention

[0005] The main purpose of the present invention is to provide a preparation method of a wear-resistant EVA liner and its application, aiming to solve the problem of insufficient wear resistance of the EVA liner in the prior art.

[0006] To achieve the above object, the present invention provides a method for preparing a wear-resistant EVA liner, which comprises the following steps:

[0007] Filler pretreatment: zirconium oxide and gas silicon are mixed in a high-speed solid mixer, and the silane coupling agent is evenly sprayed on the surface of the filler, and stirred at high speed for 10 to 30 minutes;

[0008] The pretreated filler is sent to a drying chamber and dried at 120°C for 2 hours to remove the solvent on the filler and complete the chemical bonding between the silane and the filler;

[0009] Prepare EVA material, mix the pretreated zirconium oxide and gas silicon with the EVA matrix in a certain proportion, send the mixture into an internal mixer for uniform mixing, and send the mixed product into an extruder for molding to obtain a masterbatch;

[0010] Post-treatment: the masterbatch after molding is placed at room temperature for 24 to 36 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120 to 140°C for 20 to 60 minutes.

[0011] Prepared as a liner, the post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

[0012] Furthermore, the mass ratio of the zirconium oxide to the gas silicon is 8:2 to 9:1, the particle size of the zirconium oxide is 5 to 20 μm, and the gas silicon is fumed silicon dioxide with a particle size of 10 to 50 nm.

[0013] Furthermore, the silane coupling agent is N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and the amount of the silane coupling agent used is 1.5-3% of the total mass of the filler.

[0014] Furthermore, the filler pretreatment step includes mixing zirconium oxide and gas silicon in a high-speed solid mixer, spraying a silane coupling agent evenly on the filler surface, and stirring at a high speed for 10 to 30 minutes, and further includes:

[0015] The silane coupling agent is diluted with an ethanol solution with a volume ratio of 9:1 to a concentration of 5-10%, and sprayed onto the filler surface in 3-5 times with an interval of 5 minutes at a spraying speed of 50-100 mL / min.

[0016] Furthermore, the step of sending the pretreated filler into a drying chamber and drying it at 120° C. for 2 hours to remove the solvent on the filler and complete the chemical bonding of the silane and the filler also includes:

[0017] The pretreated filler is sent to the drying room, and the temperature of the filler is raised from 25°C to 80°C at a heating rate of 5°C / min, and then kept warm for 30 minutes;

[0018] The insulated filler was heated from 80°C to 120°C at a heating rate of 3°C / min and kept at this temperature for 90 minutes.

[0019] Furthermore, the welding machine adopts a hot plate welding machine, the hot plate temperature is 150-160° C., the pressure is 0.8-1.2 MPa, the pressure holding time is 30-90s, and the weld seam strength is greater than 10 MPa.

[0020] The present invention also discloses an application of wear-resistant EVA, wherein the wear-resistant EVA liner is prepared by the wear-resistant EVA liner preparation method described in any one of the above technical solutions.

[0021] Furthermore, the total added amount of the filler is 15 to 35 wt%, and the mass ratio of the zirconium oxide to the silicon dioxide is 3:1 to 5:1.

[0022] In the present invention, an EVA material with excellent wear resistance is prepared by using zirconium oxide and gas silicon and selecting N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane as a silane coupling agent, thereby obtaining an EVA liner with excellent wear resistance and extending its service life, reducing the user's replacement frequency and reducing the overall production cost. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present invention also discloses specific application examples 1-3 and EVA application of control examples 1-2 of the prior art to conduct performance comparison experiments, which are as follows:

[0027] Embodiment 1:

[0028] Raw materials (by mass):

[0029] 1. 100 parts of EVA resin (VA content 18%);

[0030] 2. 5 parts of zirconium oxide;

[0031] 3. 1.5 parts of gas silicon;

[0032] 3. Silane coupling agent N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane 3 parts;

[0033] 4. Antioxidant: 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate;

[0034] 5. Lubricant: 1 part zinc stearate.

[0035] Preparation steps:

[0036] S1. Disperse zirconium oxide and gas silicon in ethanol according to the proportion, put them into a high-speed solid mixer for mixing, then spray the silane coupling agent evenly onto the surface of the filler, and stir at 80° C. for 30 minutes;

[0037] S2. Send the pretreated filler into a drying room, heat the filler from room temperature to 80°C at a heating rate of 5°C / min, and keep it warm for 30 minutes. After the insulation, heat it from 80 to 120°C at a heating rate of 3°C / min, and keep it warm for 1.5 hours to remove the solvent on the zirconium oxide and gas silicon;

[0038] S3, mixing the pretreated zirconium oxide and gas silicon with the EVA matrix in proportion to obtain a mixture, sending the mixture into an internal mixer for kneading, and sending the kneaded product into an extruder for extrusion molding to obtain a masterbatch;

[0039] S4, pressing the EVA blend into a sheet, placing the EVA masterbatch in an open mill for open mixing after mixing in a mixer, and then making the EVA masterbatch into a sheet-like mixture through an extruder and sending it into an extruder for extrusion molding to obtain a masterbatch;

[0040] S5. The molded masterbatch is placed at room temperature for 24 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120° C. for 30 minutes.

[0041] S6. The post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

[0042] Embodiment 2:

[0043] Raw materials (by mass):

[0044] 1. 100 parts of EVA resin (VA content 18%);

[0045] 2. 6.5 parts of zirconium oxide;

[0046] 3. 0.8 parts of gas silicon;

[0047] 3. Silane coupling agent N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane 3 parts;

[0048] 4. Antioxidant: 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate;

[0049] 5. Lubricant: 1 part zinc stearate.

[0050] Preparation steps:

[0051] S1. Disperse zirconium oxide and gas silicon in ethanol according to the proportion, put them into a high-speed solid mixer for mixing, then spray the silane coupling agent evenly onto the surface of the filler, and stir at 80° C. for 30 minutes;

[0052] S2. Send the pretreated filler into a drying room, heat the filler from room temperature to 80°C at a heating rate of 5°C / min, and keep it warm for 30 minutes. After the insulation, heat it from 80 to 120°C at a heating rate of 3°C / min, and keep it warm for 1.5 hours to remove the solvent on the zirconium oxide and gas silicon;

[0053] S3, mixing the pretreated zirconium oxide and gas silicon with the EVA matrix in proportion to obtain a mixture, sending the mixture into an internal mixer for kneading, and sending the kneaded product into an extruder for extrusion molding to obtain a masterbatch;

[0054] S4, pressing the EVA blend into a sheet, placing the EVA masterbatch in an open mill for open mixing after mixing in a mixer, and then making the EVA masterbatch into a sheet-like mixture through an extruder and sending it into an extruder for extrusion molding to obtain a masterbatch;

[0055] S5. The molded masterbatch is placed at room temperature for 24 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120° C. for 30 minutes.

[0056] S6. The post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

[0057] Embodiment 3:

[0058] Raw materials (by mass):

[0059] 1. 100 parts of EVA resin (VA content 18%);

[0060] 2. 4.5 parts of zirconium oxide;

[0061] 3. 0.5 parts of gas silicon;

[0062] 3. Silane coupling agent N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane 3 parts;

[0063] 4. Antioxidant: 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate;

[0064] 5. Lubricant: 1 part zinc stearate.

[0065] Preparation steps:

[0066] S1. Disperse zirconium oxide and gas silicon in ethanol according to the proportion, put them into a high-speed solid mixer for mixing, then spray the silane coupling agent evenly onto the surface of the filler, and stir at 80° C. for 30 minutes;

[0067] S2. Send the pretreated filler into a drying room, heat the filler from room temperature to 80°C at a heating rate of 5°C / min, and keep it warm for 30 minutes. After the insulation, heat it from 80 to 120°C at a heating rate of 3°C / min, and keep it warm for 1.5 hours to remove the solvent on the zirconium oxide and gas silicon;

[0068] S3, mixing the pretreated zirconium oxide and gas silicon with the EVA matrix in proportion to obtain a mixture, sending the mixture into an internal mixer for kneading, and sending the kneaded product into an extruder for extrusion molding to obtain a masterbatch;

[0069] S4, pressing the EVA blend into a sheet, placing the EVA masterbatch in an open mill for open mixing after mixing in a mixer, and then making the EVA masterbatch into a sheet-like mixture through an extruder and sending it into an extruder for extrusion molding to obtain a masterbatch;

[0070] S5. The molded masterbatch is placed at room temperature for 30 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120° C. for 30 minutes.

[0071] S6. The post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

[0072] Comparative Example 1:

[0073] Raw materials (by mass):

[0074] 1. 100 parts of EVA resin (VA content 18%);

[0075] 2. 5 parts of basic zinc carbonate;

[0076] 3. 5 parts of wollastonite;

[0077] 3. Silane coupling agent KH-550 3 parts;

[0078] 4. Antioxidant: 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate;

[0079] 5. Lubricant: 1 part zinc stearate.

[0080] Preparation steps:

[0081] S1. Disperse basic zinc carbonate and wollastonite in ethanol according to a certain proportion, put them into a high-speed solid mixer for mixing, then spray the silane coupling agent evenly onto the surface of the filler, and stir at 80° C. for 30 minutes;

[0082] S2. Send the pretreated filler into a drying room, heat the filler from room temperature to 80°C at a heating rate of 5°C / min, and keep it warm for 30 minutes. After the insulation, heat it from 80 to 120°C at a heating rate of 3°C / min, and keep it warm for 1.5 hours to remove the solvent on the zirconium oxide and gas silicon;

[0083] S3, mixing the pretreated basic zinc carbonate, wollastonite and EVA matrix in proportion to obtain a mixture, sending the mixture into an internal mixer for mixing, and sending the mixed product into an extruder for extrusion molding to obtain a masterbatch;

[0084] S4, pressing the EVA blend into a sheet, placing the EVA masterbatch in an open mill for open mixing after mixing in a mixer, and then making the EVA masterbatch into a sheet-like mixture through an extruder and sending it into an extruder for extrusion molding to obtain a masterbatch;

[0085] S5. The molded masterbatch is placed at room temperature for 24 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120° C. for 30 minutes.

[0086] S6. The post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

[0087] Comparative Example 2:

[0088] Raw materials (by mass):

[0089] 1. 100 parts of EVA resin (VA content 18%);

[0090] 2. 5 parts of basic zinc carbonate;

[0091] 3. 1 part of gas silicon;

[0092] 3. Silane coupling agent KH-550 3 parts;

[0093] 4. Antioxidant: 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate;

[0094] 5. Lubricant: 1 part zinc stearate.

[0095] Among them, KH-550 is γ-aminopropyltriethoxysilane.

[0096] Preparation steps:

[0097] S1. Disperse zirconium oxide and gas silicon in ethanol according to the proportion, put them into a high-speed solid mixer for mixing, then spray the silane coupling agent evenly onto the surface of the filler, and stir at 80° C. for 30 minutes;

[0098] S2. Send the pretreated filler into a drying room, heat the filler from room temperature to 80°C at a heating rate of 5°C / min, and keep it warm for 30 minutes. After the insulation, heat it from 80 to 120°C at a heating rate of 3°C / min, and keep it warm for 1.5 hours to remove the solvent on the zirconium oxide and gas silicon;

[0099] S3, mixing the pretreated zirconium oxide and gas silicon with the EVA matrix in proportion to obtain a mixture, sending the mixture into an internal mixer for kneading, and sending the kneaded product into an extruder for extrusion molding to obtain a masterbatch;

[0100] S4, pressing the EVA blend into a sheet, placing the EVA masterbatch in an open mill for open mixing after mixing in a mixer, and then making the EVA masterbatch into a sheet-like mixture through an extruder and sending it into an extruder for extrusion molding to obtain a masterbatch;

[0101] S5. The molded masterbatch is placed at room temperature for 24 to 36 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120°C for 30 minutes.

[0102] S6. The post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

[0103] Specifically, the present invention also discloses the following wear resistance comparison experiment:

[0104] 1. Quality loss:

[0105] Experimental steps:

[0106] 1. Prepare each group of example products into circular specimens with a diameter of 100 mm and a thickness of 2 mm, and prepare 5 for each group of examples;

[0107] 2. Condition the sample in a standard environment (23°C, 50% humidity) for 24 hours, and clean the sample surface with a dust-free cloth to remove dust or release agent residue;

[0108] 3. Use an electronic balance to weigh the initial mass of the sample and record it as m1. Take 5 points at the center and four sides of the sample to measure the thickness and calculate the average value t1.

[0109] Fix the sample, place it on the center of the rotating platform of the Taber abrasion tester, and press the edge of the sample with a clamp to ensure that the sample is not loose;

[0110] Calibrate the contact and adjust the height of the grinding wheel bracket to make the grinding wheel contact vertically with the sample surface to avoid tilting friction;

[0111] Start the Taber abrasion tester, set the rotation number to 1000 revolutions, the friction stroke to 235m, and the speed to 60rpm;

[0112] After reaching the set number of revolutions, the machine stops automatically, the dust collection device is turned off, the mass of the sample after wear is weighed and recorded as m2, the thickness after wear is measured and recorded as t2, and the mass loss Δm=m1-m2 and the thickness loss Δt=t1-t2 are calculated.

[0113] 2. Volume loss:

[0114] The calculation is performed according to the following formula:

[0115]

[0116] 3. Change of friction coefficient:

[0117] Experimental steps:

[0118] 1. Prepare each group of example products into circular specimens with a diameter of 100 mm and a thickness of 2 mm, and prepare 5 for each group of examples;

[0119] 2. Fix the sample on the friction coefficient tester and ensure that the surface of the sample is flat. Use a clamp to tighten the edge of the sample to prevent the sample from moving during the test.

[0120] 3. Select a steel ball with a diameter of 6 mm as the friction pair, and set the corresponding parameters of the friction coefficient tester to 5N normal force, 100mm / min sliding speed, and 10m sliding distance;

[0121] 4. Start the friction coefficient tester, let the friction pair slide on the surface of the sample, and record the changes of the friction coefficient μ with time and sliding distance in real time;

[0122] 5. Record the initial friction coefficient μ0 and the stabilized friction coefficient μ1, and calculate the change in friction coefficient Δμ.

[0123] 4. Description of surface wear morphology:

[0124] Experimental steps:

[0125] 1. Cut a small piece containing the wear area from the sample after the Taber abrasion test. The size of the small piece should be 10mm*10mm.

[0126] 2. Place the sample on the stage of an optical microscope, adjust the focus until the worn area is clearly visible, and photograph the overall morphology of the worn area, recording features such as scratches, peeling, and cracks.

[0127] The wear resistance test data is summarized in the following table:

[0128] Table 1 Summary of wear resistance test data

[0129]

[0130]

[0131] Experimental conclusion:

[0132] Through the experimental data of the above three groups of embodiments and two groups of control embodiments, it can be seen that the wear resistance shown by embodiments 1-3 disclosed in the present invention is better than that of the prior art, among which embodiment 3 performs the best, and the wear resistance is improved by more than 60% compared with the control embodiment. By selecting a suitable silane coupling agent, the dispersion of the filler can be significantly improved and the interface defects can be reduced. In the control embodiment, rapid wear is caused by filler agglomeration, and the present invention has excellent wear resistance because the filler is evenly dispersed.

[0133] In combination with all the above embodiments, the present invention adopts zirconium oxide and gas silicon and selects N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane as a silane coupling agent to prepare an EVA material with excellent wear resistance, thereby obtaining an EVA liner with excellent wear resistance, which significantly extends the service life of the material and has excellent friction stability. The present invention can be used in the fields of footwear, sports equipment, industrial transportation, etc., to avoid sudden failure of the liner under dynamic conditions, and the overall cost is reduced, which is suitable for industrial large-scale production needs.

[0134] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the present invention specification under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for preparing a wear-resistant EVA liner, characterized in that: The following steps are involved: Filler pretreatment: zirconium oxide and gas silicon are mixed in a high-speed solid mixer, and the silane coupling agent is evenly sprayed on the surface of the filler, and stirred at high speed for 10 to 30 minutes; The pretreated filler is sent to a drying chamber and dried at 120°C for 2 hours to remove the solvent on the filler and complete the chemical bonding between the silane and the filler; Prepare EVA material, mix the pretreated zirconium oxide and gas silicon with the EVA matrix in a certain proportion, send the mixture into an internal mixer for uniform mixing, and send the mixed product into an extruder for molding to obtain a masterbatch; Post-treatment: the masterbatch after molding is placed at room temperature for 24 to 36 hours. After the silane coupling agent fully migrates to the interface, the masterbatch is sent to a drying room and dried at 120 to 140°C for 20 to 60 minutes. Prepared as a liner, the post-processed masterbatch is sent to a slicing machine for cutting and slicing, and then the slicing masterbatch is sent to a welding machine for welding and splicing to obtain a wear-resistant EVA liner.

2. The method for preparing the wear-resistant EVA liner according to claim 1, characterized in that: The mass ratio of the zirconium oxide to the gas silicon is 8:2-9:1, the particle size of the zirconium oxide is 5-20 μm, and the gas silicon is fumed silicon dioxide with a particle size of 10-50 nm.

3. The method for preparing the wear-resistant EVA liner according to claim 1, characterized in that: The silane coupling agent is N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and the amount of the silane coupling agent is 1.5-3% of the total mass of the filler.

4. The method for preparing the wear-resistant EVA liner according to claim 1, characterized in that: The filler pretreatment comprises mixing zirconium oxide and gas silicon in a high-speed solid mixer, spraying a silane coupling agent uniformly on the filler surface, and stirring at a high speed for 10 to 30 minutes, and further comprises: The silane coupling agent is diluted with an ethanol solution with a volume ratio of 9:1 to a concentration of 5-10%, and sprayed onto the filler surface in 3-5 times with an interval of 5 minutes at a spraying speed of 50-100 mL / min.

5. The method for preparing the wear-resistant EVA liner according to claim 1, characterized in that: The step of sending the pretreated filler into a drying chamber and drying it at 120° C. for 2 hours to remove the solvent on the filler and complete the chemical bonding of the silane and the filler also includes: The pretreated filler is sent to the drying room, and the temperature of the filler is raised from 25°C to 80°C at a heating rate of 5°C / min, and then kept warm for 30 minutes; The insulated filler was heated from 80°C to 120°C at a heating rate of 3°C / min and kept at this temperature for 90 minutes.

6. The method for preparing the wear-resistant EVA liner according to claim 1, characterized in that: The welding machine adopts a hot plate welding machine, the hot plate temperature is 150-160° C., the pressure is 0.8-1.2 MPa, the pressure holding time is 30-90 seconds, and the weld seam strength is greater than 10 MPa.

7. A wear-resistant EVA application, characterized in that: The wear-resistant EVA is prepared by the wear-resistant EVA liner preparation method described in any one of claims 1 to 6.

8. The wear-resistant EVA application as claimed in claim 7, characterized in that: The total added amount of the filler is 15-35wt%, and the mass ratio of the zirconium oxide to the silicon dioxide is 3:1-5:1.

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