Conveyor belt surface layer material with high scraping force and light conveyor belt

Abstract

The invention discloses a conveyor belt surface layer material with high scraping force and a light conveyor belt. The conveyor belt surface layer material is prepared from the following raw materials in parts by weight: 100 to 110 parts of PVC paste resin, 1 to 3 parts of PE wax, 1 to 3 parts of tung oil, 15 to 20 parts of scratch-resistant filler and 12 to 15 parts of wear-resistant filler, wherein the scratch-causing filler is obtained by the following steps: coating the surface of silicon dioxide with polyurethane, and then carrying out surface modification on the polyurethane-coated silicon dioxide by using fluorosilane, so as to obtain the scratch-causing filler after the modification is completed; the wear-resistant filler is obtained by the following steps: placing silicon carbide whiskers in a pickling solution, centrifuging, mixing with a silane coupling agent and a solvent, washing, and drying to obtain pretreated silicon carbide whiskers; 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 conveyor belt surface layer material provided by the invention has excellent scraping force and wear resistance, and can flexibly release the stress of the scraping effect.

Description

Technical Field

[0001] The invention belongs to the technical field of conveyor belt manufacturing, and in particular relates to a conveyor belt surface layer material with high scraping force and a light conveyor belt. Background Art

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

[0003] Existing PVC materials suffer from insufficient intrinsic hardness, surface embrittlement caused by plasticizer migration, weak adhesion between the surface coating and the substrate, and stress concentration caused by the anti-slip pattern. These issues make them susceptible to deep scratches under abrasive conditions, significantly shortening their service life. While the industry has attempted to improve wear resistance by increasing the thickness of the surface layer, this has sacrificed the advantage of lightweight construction. Therefore, developing new PVC surface materials that combine high scratch resistance with lightweight construction has become a key approach to overcoming these technical bottlenecks. Summary of the Invention

[0004] Based on the deficiencies of the prior art, the object of the present invention is to provide a conveyor belt surface material and a light conveyor belt with high scraping force.

[0005] The first aspect of the present invention is to provide a conveyor belt surface material with high scraping force, which 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 scratch-causing filler, and 12-15 parts of wear-resistant filler;

[0006] The scratch-causing filler is prepared by the following steps:

[0007] A. coating polyurethane on the surface of micron-sized silica to obtain polyurethane-coated silica;

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

[0009] Preferably, step A includes:

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

[0011] A2. Mixing polyol and polyisocyanate, and performing solution polymerization in an oxygen-free atmosphere to obtain a polyurethane prepolymer;

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

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

[0014] Preferably, in A1, the particle size of the micron-sized silica is 20-60 μm, the siloxane coupling agent is selected from at least one of KH-550 and KH-560, and the amount of the siloxane coupling agent is 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 the present invention because if the silica particle size is too small, it is easy for the scratch-causing filler to be enriched on the surface of the coating layer, making it difficult to form a protruding structure; if the silica particle size is too large, it is easy for the polyurethane to cover the silica surface with too small an area or too small a coating thickness, thereby damaging the scratching properties of the scratch-causing filler.

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

[0017] Preferably, in A3, the amount of silica treated with 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 an organotin catalyst and an 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 II is 60-85°C.

[0018] Preferably, the solvents used in the solution polymerization reaction 1 and the solution polymerization reaction 2 are both selected from at least one of DMF, acetone, ethyl acetate, THF, and NMP.

[0019] It should be noted that, in the present invention, there are two specific treatment methods for the scratch-causing filler in step B:

[0020] I. Dipping Method: The polyurethane-coated silica is dipped into a fluorosilane-modifying solution and dried to produce the scratch-inducing filler. The fluorosilane-modifying solution is a mixture of a fluorosilane coupling agent, a surfactant, and water. The concentration of the fluorosilane coupling agent is 2-8 wt%, and the dipping time is 10-30 minutes.

[0021] 2. Spraying Method: Spray the fluorosilane coupling agent onto the surface of the polyurethane-coated silica and allow it to dry to obtain the scratch-resistant filler. The amount of fluorosilane coupling agent used is 0.2-0.8% of the weight of the polyurethane-coated silica. Allow the mixture to dry for 40-50 minutes and allow it to air dry at room temperature.

[0022] The fluorosilane coupling agent used in the two 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: placing silicon carbide whiskers in an acid wash solution, centrifuging and mixing with a silane coupling agent and a solvent, washing and drying to obtain pretreated silicon carbide whiskers;

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

[0026] It should be noted that pickling with a mixture of hydrofluoric acid and nitric acid can effectively remove impurities and oxide layers on the surface of silicon carbide whiskers, improve their purity and surface activity, and provide 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, isopropyl alcohol, and isopropyl ketone, the mass ratio of the silane coupling agent to the solvent is 3-5:95-97, the mass ratio of the silicon carbide whiskers to the silane coupling agent is 100:2-3, the mixing temperature is 60-70°C, and the mixing time is 1-2h;

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

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

[0030] It should be noted that the addition of leveling agent is to prevent the scratch-causing filler from settling to the bottom layer of the coating, the addition of organic bentonite is to prevent the scratch-causing filler from settling prematurely before the coating is formed, and the addition of non-ionic surfactant is 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 light conveyor belt comprising a conveyor belt surface material having high scraping power.

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

[0033] 1. The conveyor belt surface layer material provided by the present invention contains a scratch-causing filler modified by fluorosilane. Fluorosilane itself has inherent self-migration properties. During the process of coating and curing to form the surface layer, the scratching particles continuously migrate to the surface layer, thereby causing the scratching particles to gradually enrich on the surface compared to the bottom layer. Since the silica in the scratch-causing filler is micron-sized, the enriched scratching particles can better present part of the outer contour of the particles, and eventually form a "convex" microstructure on the coating surface, which can generate a scratching force on foreign objects. In addition, polyurethane has a significant tendency to be flexible and elastic, and silica has a significant tendency to be rigid. The scratch-causing filler has a "rigid and flexible" structure with silica as the coating layer and polyurethane as the coating layer. When a foreign object scratches the surface of the surface layer, the stress of the scratching action is released by the elasticity. At the same time, 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 suitable for generating a scratching function.

[0034] 2. The conveyor belt surface material provided by the present invention also contains a wear-resistant filler. Silicon carbide (SiC) whiskers are a high-performance ceramic material with inherently high hardness and strength. Methyl methacrylate is grafted onto the surface of the carbon SiC whiskers to form a graft copolymer. The grafted SiC whiskers are coated with polymer chains, significantly improving their bonding with the PVC matrix, preventing filler agglomeration, and enhancing 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, both of which can appropriately reduce the friction coefficient of the coating surface (if the amount of the two is too much, it may cause the surface material to completely lose its scratching properties) to reduce the excessive scratching effect of foreign objects and prevent foreign objects from completely destroying the scratch filler and wear-resistant filler when scratching too hard. DETAILED DESCRIPTION

[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 scratching force comprises the following raw materials in parts by weight: 105 parts of PVC paste resin, 2 parts of PE wax, 2 parts of tung oil, 18 parts of scratch-causing filler, 13 parts of wear-resistant filler, 3 parts of leveling agent, 6 parts of organic bentonite, and 1.5 parts of non-ionic surfactant.

[0039] The scratch-causing filler is prepared by the following steps:

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

[0041] (2) Polyethylene adipate glycol and polyisocyanate MDI are mixed in a mass ratio of 4:1, and a solution polymerization reaction is carried out at 85° C. in an oxygen-free atmosphere to obtain a polyurethane prepolymer; the solvent used in the solution polymerization reaction is DMF.

[0042] (3) dispersing the silica treated in (1) in a polyurethane prepolymer, adding a chain extender MOCA and an organic tin catalyst - dibutyltin dilaurate, and carrying out a solution polymerization reaction at 70°C. After the reaction is completed, the silica is dried at 55°C for 45 minutes to obtain polyurethane-coated silica;

[0043] Among them, the amount of silica treated by (1) is 15% of the mass of the polyurethane prepolymer, the amount of the chain extender is 4% of the mass of the polyurethane prepolymer, and the amount of the catalyst is 0.15% of the mass of the polyurethane prepolymer; the solvent used in the solution polymerization reaction 2 is acetone.

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

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

[0046] S1: Silicon carbide whiskers were pickled in a pickling solution consisting of a mixture of hydrofluoric acid and nitric acid in a volume ratio of 1:2.5 for 35 minutes. After centrifugation, the solution was mixed with KH-550 and ethanol at 65°C for 1.5 hours. Pretreated silicon carbide whiskers were obtained after washing and drying. The mass ratio of the silane coupling agent to the solvent was 4:96, and the mass ratio of the silicon carbide whiskers to the silane coupling agent was 100:2.

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

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

[0049] Step 1: Mix PVC paste resin, tung oil, and non-ionic surfactant OP-10, and stir at 600 rpm until a paste is formed without particles. Then add scratch-causing filler, wear-resistant filler, and leveling agent BYK-333, and stir at 1200 rpm until the fillers are no longer agglomerated. Finally, add PE wax and organic bentonite, and stir thoroughly to degas. This will give the conveyor belt surface material.

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

[0051] Step 3: Use the scraping process to apply the conveyor belt surface material obtained in the first step to the surface of the shaped polyester fabric, and then plasticize it in an infrared heating box to obtain a light conveyor belt.

[0052] Example 2

[0053] This Example 2 is basically the same as Example 1, except that the raw materials, calculated 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 scratch-causing filler, 15 parts of wear-resistant filler, 5 parts of leveling agent, 8 parts of organic bentonite, and 3 parts of non-ionic surfactant.

[0054] Example 3

[0055] This Example 3 is basically the same as Example 1, except that the raw materials, calculated 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-causing filler, 12 parts of wear-resistant filler, 1 part of leveling agent, 2 parts of organic bentonite, and 0.5 part of non-ionic surfactant.

[0056] Example 4

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

[0058] The scratch-causing 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 used was 6% of the mass of the micron-sized silica.

[0060] (2) Polyethylene adipate glycol and polyisocyanate TDI are mixed in a mass ratio of 5:1, and a solution polymerization reaction is carried out at 90° C. in an oxygen-free atmosphere to obtain a polyurethane prepolymer; the solvent used in the solution polymerization reaction is THF.

[0061] (3) dispersing the silica treated in (1) in a polyurethane prepolymer, adding a chain extender E-300 and an amine catalyst DEA, and carrying out a solution polymerization reaction at 85°C. After the reaction is completed, the silica is dried at 50°C for 50 minutes to obtain polyurethane-coated silica;

[0062] Among them, the amount of silica treated by (1) is 6% of the mass of the polyurethane prepolymer, the amount of the chain extender is 5% of the mass of the polyurethane prepolymer, the amount of the catalyst is 0.2% of the mass of the polyurethane prepolymer, and the solvent used in the solution polymerization reaction 2 is ethyl acetate.

[0063] (4) Spraying heptadecafluorodecyltrimethoxysilane on the surface of polyurethane-coated silica, letting it stand for 45 minutes and then naturally drying it to obtain a scratch-inducing filler; wherein the amount of heptadecafluorodecyltrimethoxysilane used is 0.6% of the weight of the polyurethane-coated silica.

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

[0065] S1: Silicon carbide whiskers were pickled in a pickling solution consisting of a mixture of hydrofluoric acid and nitric acid in a volume ratio of 1:3 for 40 minutes. After centrifugation, the solution was mixed with KH-550 and isopropyl alcohol at 70°C for 2 hours. Pretreated silicon carbide whiskers were obtained after washing and drying. The mass ratio of the silane coupling agent to the solvent was 5:95, and the mass ratio of the silicon carbide whiskers to the silane coupling agent was 100:3.

[0066] S2: Under the protection of inert gas, methyl methacrylate and pretreated silicon carbide whiskers are mixed in a mass ratio of 4:20, benzoyl peroxide is added, and the mixture is reacted at 80°C for 3 hours to obtain a 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 scratch-causing filler is prepared by the following steps:

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

[0071] (2) Polyethylene adipate glycol and polyisocyanate MDI are mixed in a mass ratio of 3:1, and a solution polymerization reaction is carried out in an oxygen-free atmosphere at 80° C. to obtain a polyurethane prepolymer; the solvent used in the solution polymerization reaction is ethyl acetate.

[0072] (3) dispersing the silica treated in (1) in a polyurethane prepolymer, adding a chain extender MOCA and an amine catalyst TEA, and carrying out a solution polymerization reaction at 60°C. After the reaction is completed, the silica is dried at 60°C for 40 minutes to obtain polyurethane-coated silica;

[0073] Among them, the amount of silica treated by (1) is 8% of the mass of the polyurethane prepolymer, the amount of the chain extender is 3% of the mass of the polyurethane prepolymer, the amount of the catalyst is 0.1% of the mass of the polyurethane prepolymer, and the solvent used in the solution polymerization reaction 2 is NMP.

[0074] (4) The polyurethane-coated silica was immersed in a fluorosilane-modified solution prepared by mixing trimethylfluorosilane, surfactant Zonyl FSO-100 and water for 10 minutes, and then dried to obtain a scratch-inducing filler; wherein the concentration of trimethylfluorosilane was 2 wt%.

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

[0076] S1: Silicon carbide whiskers were pickled in a pickling solution consisting of a mixture of hydrofluoric acid and nitric acid in a volume ratio of 1:2 for 45 minutes. After centrifugation, the solution was mixed with KH-550 and isopropyl ketone at 60°C for 1 hour. The pretreated silicon carbide whiskers were washed and dried. The mass ratio of the silane coupling agent to the solvent was 3:97, and the mass ratio of the silicon carbide whiskers to the silane coupling agent was 100:2.

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

[0078] Comparative Example 1

[0079] This comparative example 1 is substantially the same as Example 1, except that the raw materials do not contain a scratch-causing filler.

[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 filler.

[0082] Comparative Example 3

[0083] Comparative Example 3 is substantially the same as Example 1, except that in the step of preparing the scratch-inducing filler, the silica particle size is 80 μm.

[0084] Comparative Example 4

[0085] Comparative Example 4 is substantially the same as Example 1, except that in the step of preparing the scratch-inducing filler, the silica particle size is 10 μm.

[0086] Comparative Example 5

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

[0088] In order to verify that the conveyor belt surface material provided by the present invention has high scraping force, the performance tests were performed on the light conveyor belts prepared in Examples 1-5 and Comparative Examples 1-5. The test results are shown in Table 2.

[0089] Determination of scratch performance: The light conveyor belts prepared in the examples and comparative examples were fixed on a wooden board, and the surface was rubbed with sandpaper to observe the amount of burrs on the surface;

[0090] Wear and scratch resistance test: The light conveyor belts prepared in the examples and comparative examples were operated normally for 168 hours, and the shedding area of the surface coating was calculated to characterize the wear and scratch resistance;

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

[0092] Table 1

[0093]

[0094]

[0095] From Table 1, it can be seen that the light conveyor belt provided by the embodiment of the present invention has good scraping force and wear resistance, and the friction coefficient is also relatively low compared with the comparative example. Combined with the comparative example, it can be known that the scratch filler can form a scratching force through the "protrusion" microstructure, which increases the generation of burrs, releases the force through the polyurethane, and flexibly releases the stress of the scratching effect, making the conveyor belt surface not easy to fall off. The size of the silica particle size is also the key to affecting the performance of the scratch filler. If the particle size is too large, it is easy for the polyurethane coating area to be insufficient or the thickness to be too thick, resulting in the surface layer of the conveyor belt to fall off easily during operation, affecting the service life of the conveyor belt. If the particle size is too small, it cannot form a protrusion, and the scratch resistance is greatly reduced. Comparative Example 2 does not add wear-resistant filler, resulting in a decrease in the wear resistance of the conveyor belt surface and the surface layer is easy to fall off. Comparative Example 5 adds excessive PE wax and tung oil, and the dynamic friction is greatly reduced. The scratch filler cannot play a role, and the reduction of burrs can easily cause the material to slip on the conveyor belt, aggravating wear, affecting production efficiency and conveyor belt life.

[0096] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A conveyor belt surface material with high scraping force, characterized in that: The following raw materials are included 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 scratch-causing filler, 12-15 parts of wear-resistant filler; The scratch-causing filler is prepared by the following steps: A. coating polyurethane on the surface of micron-sized silica to obtain polyurethane-coated silica; B. Surface modification of polyurethane-coated silica is performed using fluorosilane, and the scratch-inducing filler is obtained after the modification is completed.

2. The conveyor belt surface material with high scraping force according to claim 1, characterized in that: The step A comprises: A1. Place micron-sized silica in a siloxane coupling agent for surface modification; A2. Mixing polyol and polyisocyanate, and performing solution polymerization in an oxygen-free atmosphere to obtain a polyurethane prepolymer; A3, dispersing the micron-sized silica treated by A1 in the polyurethane prepolymer, adding a chain extender and a catalyst, and performing a solution polymerization reaction. After the reaction is completed, drying is performed to obtain the polyurethane-coated silica.

3. The conveyor belt surface material with high scraping force according to claim 2, characterized in that: In the above-mentioned A1, the particle size of the micron-sized silica is 20-60 μm, the siloxane coupling agent is selected from at least one of KH-550 and KH-560, and the amount of the siloxane coupling agent is 2-6% of the mass of the micron-sized silica.

4. The conveyor belt surface material with high scraping force according to claim 2, characterized in that: In the above-mentioned A2, the polyol is polyethylene adipate glycol, the polyisocyanate is selected from at least one of MDI and TDI, the mass ratio of the polyol to the polyisocyanate is 3-5:1, and the reaction temperature of the solution polymerization reaction 1 is 80-90°C.

5. The conveyor belt surface material with high scraping force according to claim 2, characterized in that: In the A3, the amount of silica treated with 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 an organic tin catalyst and an 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 II is 60-85°C.

6. The conveyor belt surface material with high scraping force according to claim 4 or 5, characterized in that: The solvents used in the solution polymerization reaction 1 and the solution polymerization reaction 2 are both selected from at least one of DMF, acetone, ethyl acetate, THF, and NMP.

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

8. The conveyor belt surface material with high scraping force according to claim 7, characterized in that: In S1, the pickling solution is prepared by mixing 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, isopropyl alcohol, and isopropyl ketone, the mass ratio of the silane coupling agent to the solvent is 3-5:95-97, the mass ratio of the silicon carbide whiskers to the silane coupling agent is 100:2-3, the mixing temperature is 60-70°C, and the mixing time is 1-2 hours; In the above-mentioned S2, the initiator is benzoyl peroxide, the amount of the initiator is 0.5-1% of the mass of methyl methacrylate, the reaction temperature is 70-80° C., and the reaction time is 2-3 h.

9. The conveyor belt surface material with high scraping force according to claim 1, characterized in that: The conveyor belt surface layer material further comprises, by weight, 1-5 parts of a leveling agent, 2-8 parts of organic bentonite, and 0.5-3 parts of a nonionic surfactant.

10. A light conveyor belt, characterized in that: The conveyor belt surface material with high scraping force comprises the material according to claim 1.

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