A conveyor belt cover material with high scraping force and light conveyor belt

Abstract

The application discloses a conveying belt surface layer material with high scraping force and a light conveying belt. The conveying belt surface layer material comprises the following raw materials in parts by weight: 100-110 parts of PVC paste resin, 1-3 parts of PE wax, 1-3 parts of tung oil, 15-20 parts of scraping force causing filler, and 12-15 parts of wear-resistant filler. The scraping force causing filler is obtained by the following steps: polyurethane is coated on the surface of silicon dioxide, then fluorosilane is used to modify the surface of the polyurethane coated silicon dioxide, and the scraping force causing filler is obtained after the modification is completed. The wear-resistant filler is obtained by the following steps: silicon carbide whiskers are placed in an acid washing solution, after centrifugation, the silicon carbide whiskers are mixed with silane coupling agent and a solvent, and after washing and drying, pretreated silicon carbide whiskers are obtained. Under the protection of inert gas, methyl methacrylate and the pretreated silicon carbide whiskers are mixed, an initiator is added, and the wear-resistant filler is obtained after the reaction is completed. The conveying belt surface layer material provided by the application has excellent scraping force and wear resistance, and can flexibly release the stress of the scraping action.

Description

Technical Field

[0001] This invention belongs to the field of conveyor belt manufacturing technology, specifically relating to a conveyor belt surface material with high abrasion resistance and a lightweight conveyor belt. Background Technology

[0002] As a core component in industrial conveying, PVC lightweight conveyor belts are widely used in light-load scenarios such as food processing, packaging and sorting, and electronic assembly due to their advantages such as lightweight, resistance to acid and alkali corrosion, easy processing and molding, and low operating energy consumption. However, with the development of intelligent manufacturing and logistics automation, the requirements for the scratch resistance of conveyor systems are becoming increasingly stringent—especially when transporting metal parts, ore fragments, or packages with sharp edges, the surface damage problem of traditional PVC surface materials is becoming increasingly prominent.

[0003] In existing technologies, PVC materials suffer from insufficient intrinsic hardness, surface embrittlement due to plasticizer migration, weak adhesion between the surface coating and the substrate, and stress concentration caused by anti-slip texture design. These issues make them prone to deep scratches and significantly shorten their service life under scratching conditions. Although the industry has attempted to improve wear resistance by increasing the thickness of the surface layer, this has come at the cost of lightweight properties. Therefore, developing new PVC surface layer materials that combine high scratch resistance with lightweight properties has become a key direction for overcoming these technological bottlenecks. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a conveyor belt surface material with high scratch resistance and a lightweight conveyor belt.

[0005] The first aspect of this invention is to provide a conveyor belt surface material with high scratching force, comprising the following raw materials by weight: 100-110 parts of PVC paste resin, 1-3 parts of PE wax, 1-3 parts of tung oil, 15-20 parts of scratching filler, and 12-15 parts of wear-resistant filler.

[0006] The scraping filler is prepared by the following steps:

[0007] A. Polyurethane is coated onto the surface of micron-sized silica to obtain polyurethane-coated silica;

[0008] B. Surface modification of polyurethane-coated silica was performed using fluorosilane, and a scraping filler was obtained after the modification was completed.

[0009] Preferably, step A includes:

[0010] A1. Place micron-sized silica in a siloxane coupling agent for surface modification;

[0011] A2. Mix polyol and polyisocyanate and carry out solution polymerization reaction one under an oxygen-free atmosphere. After the reaction is completed, polyurethane prepolymer is obtained.

[0012] A3. Disperse the micron-sized silica treated in A1 into the polyurethane prepolymer, add chain extender and catalyst, and carry out solution polymerization reaction II. After the reaction is completed, dry to obtain polyurethane-coated silica.

[0013] It should be noted that A2 reacts in an oxygen-free atmosphere to prevent oxidation side reactions from occurring.

[0014] Preferably, in A1, the micron-sized silica particles have a diameter of 20-60 μm, and the siloxane coupling agent is selected from at least one of KH-550 and KH-560, with the amount of siloxane coupling agent being 2-6% of the mass of the micron-sized silica.

[0015] It should be noted that the micron-sized silica particle size is limited in this invention because if the silica particle size is too small, it is easy for the scratch-resistant filler to accumulate on the surface of the coating layer and make it difficult to form a raised structure; if the silica particle size is too large, it is easy for the polyurethane to cover the silica surface area or cover the silica thickness too small, which will impair the scratch-resistant properties of the scratch-resistant filler.

[0016] Preferably, in A2, the polyol is polyethylene adipate diol, the polyisocyanate is selected from at least one of MDI and TDI, the mass ratio of polyol to polyisocyanate is 3-5:1, and the reaction temperature of solution polymerization reaction one is 80-90℃.

[0017] Preferably, in A3, the amount of silica treated by A1 is 8-26% of the mass of the polyurethane prepolymer, the chain extender is selected from at least one of MOCA and E-300, the amount of the chain extender is 3-5% of the mass of the polyurethane prepolymer, the catalyst is selected from at least one of organotin catalyst and amine catalyst, the amount of the catalyst is 0.1-0.2% of the mass of the polyurethane prepolymer, and the reaction temperature of the solution polymerization reaction is 60-85℃.

[0018] Preferably, the solvents used in solution polymerization reaction one and solution polymerization reaction two are selected from at least one of DMF, acetone, ethyl acetate, THF, and NMP.

[0019] It should be noted that, in this invention, there are two specific processing methods for the scraping filler step B:

[0020] I. Impregnation Method: Polyurethane-coated silica is impregnated in a fluorosilane-modified solution, and then dried to obtain the scraping filler. The fluorosilane-modified solution is composed of a fluorosilane coupling agent, a surfactant, and water. The concentration of the fluorosilane coupling agent is 2-8 wt%, and the impregnation time is 10-30 minutes.

[0021] II. Spraying method: Spray the fluorosilane coupling agent onto the polyurethane-coated silica surface, and allow it to dry naturally to obtain the scraping filler. The amount of fluorosilane coupling agent used is 0.2-0.8% of the weight of the polyurethane-coated silica, the standing time is 40-50 minutes, and the drying conditions are natural air drying at room temperature.

[0022] The fluorosilane coupling agent used in both methods is selected from at least one of trimethylfluorosilane and heptadecafluorodecyltrimethoxysilane.

[0023] Preferably, the wear-resistant filler is prepared by the following steps:

[0024] S1: Place silicon carbide whiskers in an acid washing solution, centrifuge, mix with silane coupling agent and solvent, and obtain pretreated silicon carbide whiskers after washing and drying.

[0025] S2: Under inert gas protection, methyl methacrylate and pretreated silicon carbide whiskers are mixed at a mass ratio of 3-4:20, an initiator is added, and the wear-resistant filler is obtained after the reaction is complete.

[0026] It should be noted that acid washing with a mixture of hydrofluoric acid and nitric acid can effectively remove impurities and oxide layers from the surface of silicon carbide whiskers, improving their purity and surface activity, and providing a clean surface for subsequent grafting reactions.

[0027] Preferably, in S1, the pickling solution is a mixture of hydrofluoric acid and nitric acid in a volume ratio of 1:2-3, the silane coupling agent is KH-550, the solvent is selected from at least one of ethanol, isopropanol, and isoacetone, the mass ratio of silane coupling agent to solvent is 3-5:95-97, the mass ratio of silicon carbide whiskers to silane coupling agent is 100:2-3, the mixing temperature is 60-70℃, and the mixing time is 1-2h.

[0028] In S2, the initiator is benzoyl peroxide, the amount of initiator is 0.5-1% of the mass of methyl methacrylate, the reaction temperature is 70-80℃, and the reaction time is 2-3h.

[0029] Preferably, the conveyor belt surface material further includes, by weight, 1-5 parts leveling agent, 2-8 parts organic bentonite, and 0.5-3 parts nonionic surfactant.

[0030] It should be noted that leveling agents are added to prevent the scratch-causing filler from settling to the bottom layer of the coating, organic bentonite is added to prevent the scratch-causing filler from settling too early before the coating is formed, and nonionic surfactants are added to reduce the surface tension of the surface coating liquid and promote the migration of the scratch-causing filler to the surface.

[0031] A second aspect of the present invention is to provide a lightweight conveyor belt comprising a conveyor belt surface material having high abrasiveness.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The conveyor belt surface material provided by this invention includes a fluorosilane-modified scraping filler. Fluorosilane itself has inherent self-migration properties. During the coating and curing process to form the surface layer, scraping particles continuously migrate to the surface, thus gradually enriching the scraping particles on the surface compared to the underlying layer. Since the silica in the scraping filler is at the micron level, the enriched scraping particles can better exhibit part of their particle outline, ultimately forming a "protruding" microstructure on the coating surface. This microstructure can generate scraping force against external objects. In addition, polyurethane has a significant tendency to be flexible, while silica has a significant tendency to be rigid. The scraping filler has a "rigid-flexible" structure with silica as the underlayer and polyurethane as the overlayer. When external objects are scraped on the surface layer, the stress of the scraping action is released by the flexibility, while the rigidity of silica can maintain the structural stability of the entire particle, avoiding structural damage to the filler itself caused by the scraping force, and is better suited for generating scraping function.

[0034] 2. The conveyor belt surface material provided by this invention also includes wear-resistant filler. Silicon carbide (SiC) whiskers are a high-performance ceramic material with high hardness and high strength. Methyl methacrylate undergoes a grafting reaction on the surface of the SiC whiskers to form a graft copolymer. The surface of the grafted silicon carbide whiskers is wrapped with polymer chains, which significantly improves its bonding force with the PVC matrix, prevents filler agglomeration, and enhances the performance of the composite material.

[0035] 3. The conveyor belt surface material provided by the present invention also includes PE wax and tung oil. The two can appropriately reduce the friction coefficient of the coating surface (if the two are used in excessive amounts, the surface material may completely lose its scratch resistance), so as to reduce the excessive scratching effect of external objects and prevent the scratch filler and wear-resistant filler from being completely destroyed when the external objects scratch too violently. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the embodiments.

[0037] Example 1

[0038] A conveyor belt surface material with high scratch resistance comprises the following raw materials by weight: 105 parts PVC paste resin, 2 parts PE wax, 2 parts tung oil, 18 parts scratch-resistant filler, 13 parts wear-resistant filler, 3 parts leveling agent, 6 parts organic bentonite, and 1.5 parts nonionic surfactant.

[0039] The scraping filler is prepared by the following steps:

[0040] (1) Micron-sized silica with a particle size of 45 μm was placed in siloxane coupling agent KH-550 for surface modification; wherein, the amount of siloxane coupling agent was 4% of the mass of micron-sized silica.

[0041] (2) Polyethylene adipate diol and polyisocyanate MDI are mixed at a mass ratio of 4:1 and subjected to solution polymerization reaction one at 85°C in an oxygen-free atmosphere. After the reaction is completed, polyurethane prepolymer is obtained. The solvent used in solution polymerization reaction one is DMF.

[0042] (3) Disperse the silica treated by (1) in the polyurethane prepolymer, add chain extender MOCA and organotin catalyst - dibutyltin dilaurate, and carry out solution polymerization reaction II at 70°C. After the reaction is completed, dry at 55°C for 45 min to obtain polyurethane-coated silica.

[0043] Among them, the amount of silica treated by (1) is 15% of the mass of polyurethane prepolymer, the amount of chain extender is 4% of the mass of polyurethane prepolymer, and the amount of catalyst is 0.15% of the mass of polyurethane prepolymer; the solvent used in solution polymerization reaction II is acetone.

[0044] (4) The polyurethane-coated silica was immersed in a fluorosilane modified solution composed of trimethylfluorosilane, surfactant ZonylFSO-100 and water for 20 minutes and then dried to obtain the scraping filler; wherein the concentration of trimethylfluorosilane was 5 wt%.

[0045] The wear-resistant filler is prepared by the following steps:

[0046] S1: Place silicon carbide whiskers in an acid pickling solution made of hydrofluoric acid and nitric acid in a volume ratio of 1:2.5 and pickle for 35 min. After centrifugation, mix with KH-550 and ethanol at 65°C for 1.5 h. After washing and drying, pretreated silicon carbide whiskers are obtained. The mass ratio of silane coupling agent to solvent is 4:96, and the mass ratio of silicon carbide whiskers to silane coupling agent is 100:2.

[0047] S2: Under inert gas protection, methyl methacrylate and pretreated silicon carbide whiskers are mixed at a mass ratio of 3:20, benzoyl peroxide is added, and the mixture is reacted at 75°C for 2 hours to obtain the wear-resistant filler; wherein, the amount of benzoyl peroxide is 0.8% of the mass of methyl methacrylate.

[0048] A lightweight conveyor belt comprising the above-mentioned conveyor belt surface layer material is prepared by the following steps:

[0049] Step 1: Mix PVC paste resin, tung oil, and nonionic surfactant OP-10, and stir at 600 rpm until a paste is formed without particles. Then add scraping filler, wear-resistant filler, and leveling agent BYK-333, and stir at 1200 rpm until the filler is free of agglomeration. Finally, add PE wax and organic bentonite, and stir thoroughly to remove bubbles to obtain the conveyor belt surface material.

[0050] Step 2: Heat set the polyester fabric used to prepare the lightweight conveyor belt;

[0051] Step 3: The conveyor belt surface material obtained in Step 1 is coated onto the surface of the shaped polyester fabric using a scraping process, and then plasticized in an infrared heating box to obtain a lightweight conveyor belt.

[0052] Example 2

[0053] This Example 2 is basically the same as Example 1, except that the raw materials, by weight, include the following components: 110 parts of PVC paste resin, 3 parts of PE wax, 3 parts of tung oil, 20 parts of scraping filler, 15 parts of wear-resistant filler, 5 parts of leveling agent, 8 parts of organic bentonite, and 3 parts of nonionic surfactant.

[0054] Example 3

[0055] This embodiment 3 is basically the same as embodiment 1, except that the raw materials, by weight, include the following components: 100 parts of PVC paste resin, 1 part of PE wax, 1 part of tung oil, 15 parts of scratch-resistant filler, 12 parts of wear-resistant filler, 1 part of leveling agent, 2 parts of organic bentonite, and 0.5 parts of nonionic surfactant.

[0056] Example 4

[0057] This embodiment 4 is basically the same as embodiment 1, except that:

[0058] The scraping filler is prepared by the following steps:

[0059] (1) Micron-sized silica with a particle size of 60 μm was placed in KH-560 for surface modification; wherein, the amount of siloxane coupling agent was 6% of the mass of micron-sized silica.

[0060] (2) Polyethylene adipate diol and polyisocyanate TDI are mixed at a mass ratio of 5:1 and subjected to solution polymerization reaction one at 90°C in an oxygen-free atmosphere. After the reaction is completed, polyurethane prepolymer is obtained. The solvent used in solution polymerization reaction one is THF.

[0061] (3) Disperse the silica treated in (1) in the polyurethane prepolymer, add chain extender E-300 and amine catalyst DEA, and carry out solution polymerization reaction II at 85°C. After the reaction is completed, dry at 50°C for 50 min to obtain polyurethane-coated silica.

[0062] Among them, the amount of silica treated by (1) is 6% of the mass of polyurethane prepolymer, the amount of chain extender is 5% of the mass of polyurethane prepolymer, the amount of catalyst is 0.2% of the mass of polyurethane prepolymer, and the solvent used in solution polymerization reaction II is ethyl acetate.

[0063] (4) Spray heptadecanyltrimethoxysilane onto the surface of polyurethane-coated silica, let it stand for 45 minutes and then air dry to obtain the scraping filler; wherein, the amount of heptadecanyltrimethoxysilane is 0.6% of the weight of polyurethane-coated silica.

[0064] The wear-resistant filler is prepared by the following steps:

[0065] S1: Place silicon carbide whiskers in an acid pickling solution made of hydrofluoric acid and nitric acid in a volume ratio of 1:3 and pickle for 40 min. After centrifugation, mix with KH-550 and isopropanol at 70℃ for 2 h. After washing and drying, pretreated silicon carbide whiskers are obtained. The mass ratio of silane coupling agent to solvent is 5:95, and the mass ratio of silicon carbide whiskers to silane coupling agent is 100:3.

[0066] S2: Under inert gas protection, methyl methacrylate and pretreated silicon carbide whiskers are mixed at a mass ratio of 4:20, benzoyl peroxide is added, and the mixture is reacted at 80°C for 3 hours to obtain the wear-resistant filler; wherein, the amount of benzoyl peroxide is 1% of the mass of methyl methacrylate.

[0067] Example 5

[0068] This embodiment 5 is basically the same as embodiment 1, except that:

[0069] The scraping filler is prepared by the following steps:

[0070] (1) Micron-sized silica with a particle size of 20 μm was placed in KH-550 for surface modification; wherein the amount of siloxane coupling agent was 2% of the mass of micron-sized silica.

[0071] (2) Polyethylene adipate diol and polyisocyanate MDI are mixed at a mass ratio of 3:1 and subjected to solution polymerization reaction one at 80°C in an oxygen-free atmosphere. After the reaction is completed, polyurethane prepolymer is obtained. The solvent used in solution polymerization reaction one is ethyl acetate.

[0072] (3) Disperse the silica treated in (1) in the polyurethane prepolymer, add chain extender MOCA and amine catalyst TEA, and carry out solution polymerization reaction II at 60°C. After the reaction is completed, dry at 60°C for 40 min to obtain polyurethane-coated silica.

[0073] Among them, the amount of silica treated by (1) is 8% of the mass of polyurethane prepolymer, the amount of chain extender is 3% of the mass of polyurethane prepolymer, the amount of catalyst is 0.1% of the mass of polyurethane prepolymer, and the solvent used in solution polymerization reaction II is NMP.

[0074] (4) The polyurethane-coated silica was immersed in a fluorosilane modified solution composed of trimethylfluorosilane, surfactant ZonylFSO-100 and water for 10 min and then dried to obtain the scraping filler; wherein the concentration of trimethylfluorosilane was 2 wt%.

[0075] The wear-resistant filler is prepared by the following steps:

[0076] S1: Place silicon carbide whiskers in an acid pickling solution made of hydrofluoric acid and nitric acid in a volume ratio of 1:2 and pickle for 45 min. After centrifugation, mix with KH-550 and isopropyl ketone at 60°C for 1 h. After washing and drying, pretreated silicon carbide whiskers are obtained. The mass ratio of silane coupling agent to solvent is 3:97, and the mass ratio of silicon carbide whiskers to silane coupling agent is 100:2.

[0077] S2: Under inert gas protection, methyl methacrylate and pretreated silicon carbide whiskers are mixed at a mass ratio of 3:20, benzoyl peroxide is added, and the mixture is reacted at 70°C for 2 hours to obtain the wear-resistant filler; wherein, the amount of benzoyl peroxide is 0.5% of the mass of methyl methacrylate.

[0078] Comparative Example 1

[0079] Comparative Example 1 is basically the same as Example 1, except that the raw material does not contain scratch-inducing fillers.

[0080] Comparative Example 2

[0081] Comparative Example 2 is basically the same as Example 1, except that the raw materials do not contain wear-resistant fillers.

[0082] Comparative Example 3

[0083] Comparative Example 3 is basically the same as Example 1, except that the silica particle size is 80 μm in the scraping filler preparation step.

[0084] Comparative Example 4

[0085] Comparative Example 4 is basically the same as Example 1, except that the silica particle size is 10 μm in the scraping filler preparation step.

[0086] Comparative Example 5

[0087] Comparative Example 5 is basically the same as Example 1, except that: by weight, the raw materials include 5 parts of PE wax and 5 parts of tung oil.

[0088] To verify that the conveyor belt surface material provided by the present invention has high scratch resistance, the performance of the lightweight conveyor belts prepared in Examples 1-5 and Comparative Examples 1-5 was tested. The test results are shown in Table 2.

[0089] Scratch performance test: The lightweight conveyor belts prepared in the examples and comparative examples were fixed on a wooden board and rubbed with sandpaper. The amount of burrs that appeared on the surface was observed.

[0090] Abrasion and scratch resistance tests: The lightweight conveyor belts prepared in the examples and comparative examples were operated normally for 168 hours, and the area of ​​surface coating peeling was calculated to characterize the abrasion and scratch resistance.

[0091] Friction performance test: The coefficient of friction of the PVC conveyor belts prepared in the examples and comparative examples was determined in accordance with the national standard GB / T33205-2016.

[0092] Table 1

[0093]

[0094]

[0095] As shown in Table 1, the lightweight conveyor belt provided by the embodiments of the present invention has good scraping force and wear resistance, and the coefficient of friction is relatively low compared with the comparative examples. Combined with the comparative examples, it can be seen that the scraping filler can form scraping force through the "protruding" microstructure, increasing burr formation. Through the release force of polyurethane, the stress of the scraping action is flexibly released, making the conveyor belt surface less prone to detachment. The size of the silica particle size is also a key factor affecting the performance of the scraping filler. If the particle size is too large, the polyurethane coating area is insufficient or the thickness is too thick, causing the surface layer of the conveyor belt to easily detach during operation, affecting the service life of the conveyor belt. If the particle size is too small, it cannot form protrusions, and the scraping resistance decreases significantly. Comparative Example 2 did not add wear-resistant filler, resulting in a decrease in the wear resistance of the conveyor belt surface and easy detachment of the surface layer. Comparative Example 5 added excessive PE wax and tung oil, significantly reducing dynamic friction, rendering the scraping filler ineffective. The reduced burrs easily cause materials to slip on the conveyor belt, increasing wear and affecting production efficiency and conveyor belt life.

[0096] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A conveyor belt surface material with high scratch resistance, characterized in that, The following ingredients are included by weight: 100-110 parts PVC paste resin, 1-3 parts PE wax, 1-3 parts tung oil, 15-20 parts scratch-resistant filler, and 12-15 parts wear-resistant filler; The scraping filler is prepared by the following steps: A. Polyurethane is coated onto the surface of micron-sized silica with a particle size of 20-60 μm to obtain polyurethane-coated silica; B. Surface modification of polyurethane-coated silica was performed using fluorosilane, and the resulting scraping filler was obtained after modification. Step A includes: A1. Place micron-sized silica in a siloxane coupling agent for surface modification; A2. Mix polyol and polyisocyanate and carry out solution polymerization reaction one under an oxygen-free atmosphere. After the reaction is completed, polyurethane prepolymer is obtained. A3. Disperse the micron-sized silica treated in A1 in the polyurethane prepolymer, add chain extender and catalyst, and carry out solution polymerization reaction II. After the reaction is completed, dry to obtain the polyurethane-coated silica. In A1, the siloxane coupling agent is selected from at least one of KH-550 and KH-560, and the amount of siloxane coupling agent used is 2-6% of the mass of micron-sized silica; In A2, the polyol is polyethylene adipate diol, the polyisocyanate is selected from at least one of MDI and TDI, the mass ratio of polyol to polyisocyanate is 3-5:1, and the reaction temperature of solution polymerization reaction one is 80-90℃. In A3, the amount of silica treated by A1 is 8-26% of the mass of the polyurethane prepolymer, the chain extender is selected from at least one of MOCA and E-300, the amount of the chain extender is 3-5% of the mass of the polyurethane prepolymer, the catalyst is selected from at least one of organotin catalyst and amine catalyst, the amount of the catalyst is 0.1-0.2% of the mass of the polyurethane prepolymer, and the reaction temperature of solution polymerization reaction II is 60-85℃.

2. The conveyor belt surface material with high scratch resistance according to claim 1, characterized in that, The solvents used in both solution polymerization reaction one and solution polymerization reaction two are selected from at least one of DMF, acetone, ethyl acetate, THF, and NMP.

3. The conveyor belt surface material with high scratch resistance according to claim 1, characterized in that, The wear-resistant filler is prepared by the following steps: S1: Place silicon carbide whiskers in an acid washing solution, centrifuge, mix with silane coupling agent and solvent, and obtain pretreated silicon carbide whiskers after washing and drying. S2: Under inert gas protection, methyl methacrylate and the pretreated silicon carbide whiskers are mixed at a mass ratio of 3-4:20, an initiator is added, and the wear-resistant filler is obtained after the reaction is completed.

4. The conveyor belt surface material with high scratch resistance according to claim 3, characterized in that, In S1, the pickling solution is composed of hydrofluoric acid and nitric acid mixed in a volume ratio of 1:2-3, the silane coupling agent is KH-550, the solvent is selected from at least one of ethanol, isopropanol, and isoacetone, the mass ratio of silane coupling agent to solvent is 3-5:95-97, the mass ratio of silicon carbide whiskers to silane coupling agent is 100:2-3, the mixing temperature is 60-70℃, and the mixing time is 1-2 h; In S2, the initiator is benzoyl peroxide, the amount of initiator is 0.5-1% of the mass of methyl methacrylate, the reaction temperature is 70-80℃, and the reaction time is 2-3h.

5. The conveyor belt surface material with high scratch resistance according to claim 1, characterized in that, The conveyor belt surface material also includes, by weight, 1-5 parts leveling agent, 2-8 parts organic bentonite, and 0.5-3 parts nonionic surfactant.

6. A lightweight conveyor belt, characterized in that, It includes the conveyor belt surface material with high scratch resistance as described in claim 1.

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