Wear-resistant high-flame-retardant rubber sieve plate material and preparation method thereof

Abstract

The invention relates to a wear-resistant high-flame-retardant rubber sieve plate material and a preparation method thereof, and belongs to the field of rubber. The chloroprene rubber and the high styrene rubber are selected as main body rubber materials, the chloroprene rubber and the high styrene rubber complement each other in advantages, the chloroprene rubber has the innate flame retardant advantage, the flame retardant property of the material is greatly improved through the synergistic effect of a phosphorus flame retardant and a nano aluminum hydroxide compound system, and efficient flame retardance is achieved; due to the introduction of high styrene rubber, the hardness, stress at definite elongation and wear resistance of the material are improved, the prepared rubber sieve plate is hard in surface, cutting and wear of the material can be effectively resisted, and the service life is prolonged; by adopting a two-stage mixing method, uniform dispersion of a high-filling-amount formula is ensured, on one hand, the problem caused by non-uniform dispersion of filler in the mixing process is avoided, and on the other hand, the problem that chloroprene rubber is easy to scorch is avoided.

Description

Technical Field

[0001] This invention belongs to the field of rubber technology, and specifically relates to a wear-resistant and highly flame-retardant rubber sieve material and its preparation method. Background Technology

[0002] In material screening operations across industries such as coal, metallurgy, chemicals, and mining, rubber screens, with their excellent elasticity, wear resistance, corrosion resistance, and shock absorption properties, have become a crucial component of industrial equipment, widely used in various vibrating screens and other screening devices. In the coal mining industry, rubber screens are used to classify and screen raw coal, separating products of different particle sizes to meet the diverse quality requirements of different users and ensure the smooth progress of subsequent coal processing and utilization. In the metallurgical industry, rubber screens ensure uniform particle size of materials entering the smelting stage during the screening of ore raw materials and intermediate products, contributing to improved smelting efficiency and product quality. In the chemical industry, the screening process for various chemical raw materials and finished products relies on rubber screens to ensure that the particle size specifications of the products meet production and usage standards. In metal mining, the screening of ore by rubber screens is a crucial preliminary step in subsequent mineral processing and beneficiation, directly impacting the economic benefits of mining operations.

[0003] Despite the widespread use of rubber screens in the aforementioned industries, traditional rubber screens have significant shortcomings in wear resistance and flame retardancy. Regarding wear resistance, when subjected to frequent and prolonged friction with high-hardness, highly abrasive materials such as ores and gravel, the screen surface is prone to wear, scratches, enlarged or deformed screen holes, and even perforation, leading to a shortened lifespan. Frequent screen replacements not only increase production costs but also affect production efficiency, causing increased downtime and reduced capacity. As for flame retardancy, ordinary rubber screens are mostly made of natural rubber or conventional synthetic rubber, which is inherently flammable. In fire-prone environments, such as underground coal mines and flammable chemical raw material screening workshops, the rubber screens will burn rapidly in the event of a fire, not only exacerbating the spread of the fire but also producing large amounts of toxic and harmful gases, threatening personnel safety and the safety of production facilities, thus limiting their application in these special working conditions.

[0004] As various industries continue to raise their requirements for safe and efficient production, it is extremely necessary to develop a rubber screen material and preparation method that combines excellent wear resistance and high flame retardancy. This material can not only improve the working efficiency and service life of screening equipment and reduce production costs, but also enhance workplace safety, effectively prevent the occurrence and spread of fire accidents, and protect the safety of personnel and property. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wear-resistant and flame-retardant rubber screen material and its preparation method. The rubber screen material prepared by this method has excellent wear resistance, aging resistance, good mechanical properties and high flame retardancy, thereby achieving comprehensive improvement in material performance, extending service life and improving safety.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant and highly flame-retardant rubber screen material, characterized in that it is composed of the following components, with 100 parts by weight of rubber as the base material, and the weight percentages are as follows: Chloroprene rubber 65-95 parts; High styrene rubber 5-35 parts; Zinc oxide 3-6 parts; Stearic acid 1-2 parts; Magnesium oxide 3-5 parts; Microcrystalline wax 0.5-1.5 parts; Antioxidant 4010NA 1-2 parts; Antioxidant RD 1-2 parts; Carbon black 20-40 parts; Nano aluminum hydroxide 30-50 parts; Antimony trioxide 5-10 parts; Coated red phosphorus 8-12 parts; Silica 5-10 parts; Coupling agent 1-2 parts; Naphthenic oil 10-20 parts; Accelerator DM 0.5-2 parts; Accelerator CZ 1-2 parts; Accelerator DBTU 1-2 parts; Accelerator TMTD 0.5-0.8 parts; Sulfur 0.5-1.5 parts.

[0007] The chloroprene rubber is electrochemical M-40.

[0008] The high-styrene rubber is HS-860.

[0009] The magnesium oxide is highly active magnesium oxide RA-150.

[0010] The antioxidant 4010NA is N-isopropyl-N'-phenyl-p-phenylenediamine.

[0011] The antioxidant RD is a 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

[0012] The carbon black is Cabot carbon black N330.

[0013] The silica is NEWSIL® 175 silica.

[0014] The coupling agent is silane coupling agent KH-550.

[0015] A method for preparing the aforementioned wear-resistant and flame-retardant rubber sieve plate material, characterized by comprising the following steps: Step 1: Ingredients: Prepare the ingredients according to the following weight proportions: Chloroprene rubber 65-95 parts; High-styrene rubber 5-35 parts; Zinc oxide 3-6 parts; Stearic acid 1-2 parts; Magnesium oxide 3-5 parts; Microcrystalline wax 0.5-1.5 parts; Antioxidant 4010NA 1-2 parts; Antioxidant RD 1-2 parts; Carbon black 20-40 parts; Nano aluminum hydroxide 30-50 parts; Antimony trioxide 5-10 parts; Coated red phosphorus 8-12 parts; Silica 5-10 parts; Coupling agent 1-2 parts; Naphthenic oil 10-20 parts; Accelerator DM 0.5-2 parts; Accelerator CZ 1-2 parts; Accelerator DBTU 1-2 parts; Accelerator TMTD 0.5-0.8 parts; Sulfur 0.5-1.5 parts; Step Two: Plasticizing First, the chloroprene rubber and high-styrene rubber are plasticized. The chloroprene rubber and high-styrene rubber are fed into a two-roll mill and passed through a thin mill at room temperature. During the plasticizing process, the roller gap is controlled at 0.5-1mm, the roller temperature is 50-60℃, and the plasticizing time is 10-20min until the rubber surface is smooth and there are no obvious lumps. Step 3: Mixing: The first stage of compounding is carried out using an internal mixer. The chloroprene rubber and high-styrene rubber plasticized in step two are added into the internal mixer according to the formula ratio. Then, magnesium oxide, stearic acid, microcrystalline wax, antioxidant 4010NA, and antioxidant RD are added in sequence and mixed for 2-5 minutes. Then, carbon black, nano aluminum hydroxide, antimony trioxide, coated red phosphorus, white carbon black, coupling agent, and naphthenic oil are added and mixed for 4-8 minutes. The initial mixing temperature is controlled at 50-70℃, and the discharge temperature is controlled below 110℃. After discharge, the rubber compound is transferred to an open mill for sheeting and cooling to obtain the first stage compound. Step 4: Second-stage sulfonation: After the temperature of the first-stage compound obtained from step three is reduced to room temperature, zinc oxide, sulfur, accelerator DM, accelerator CZ, accelerator DBTU and accelerator TMTD are added to the open mill and tamped. The roller temperature is controlled at 50-60℃ and the tamping time is 3-5 minutes to ensure uniform tamping and obtain the second-stage compound. Step 5: Cutting the film: The two-stage compounded rubber compound from step four is sheeted using an open mill to prepare wear-resistant and highly flame-retardant rubber sieve material. Step Six: Vulcanization Molding Place the rubber material cut from step five into a mold, and vulcanize it using a flat vulcanizing machine. Set the vulcanization temperature to 140-150℃, the vulcanization pressure to 10-15MPa, and the vulcanization time to 20-30min to obtain the wear-resistant and flame-retardant rubber screen plate.

[0016] The beneficial effects of this invention are: 1. This invention uses chloroprene rubber and high-styrene rubber as the main rubber materials. The complementary advantages of these two materials endow the rubber sieve plate material with superior performance. Chloroprene rubber, due to the presence of chlorine atoms in its molecular structure, possesses inherent flame-retardant advantages. Furthermore, the synergistic effect of a phosphorus-based flame retardant and a nano-aluminum hydroxide composite system greatly enhances the material's flame-retardant properties, achieving highly efficient flame retardancy. The high flame-retardant rubber sieve plate material of this invention has an oxygen index exceeding 32%, making it difficult to ignite when exposed to open flames. Even if combustion occurs under flame conditions, it can quickly self-extinguish after the fire source is removed, and the amount of smoke and toxic gases produced during combustion is low.

[0017] 2. The introduction of high-styrene rubber improves the material's hardness, tensile stress, and wear resistance. The resulting rubber screen plate has a hard surface, effectively resisting material cutting and wear, and extending its service life. This not only reduces the frequency of rubber screen plate replacement and lowers investment in screen plate procurement and replacement, but also significantly reduces production interruptions caused by downtime for replacing rubber screen plates, improving screening efficiency and ensuring production continuity.

[0018] 3. The two-stage mixing method ensures the uniform dispersion of the high-filler formulation. This avoids problems caused by uneven filler dispersion during the mixing process and also prevents chloroprene rubber from scorching. Detailed Implementation

[0019] The technical solution of this application will be further described below with reference to specific embodiments.

[0020] This application uses chloroprene rubber as electrochemical M-40. Due to the presence of chlorine atoms in its structure, chloroprene rubber possesses inherent flame-retardant advantages. Under high-temperature conditions, chlorine atoms undergo a series of chemical reactions, releasing hydrogen chloride gas. This gas dilutes the oxygen concentration in the combustion zone and interferes with the free radical chain reaction of combustion, thereby effectively inhibiting the spread of flame and providing the material with basic flame-retardant properties. Chloroprene rubber also possesses good flexibility, tensile strength, and aging resistance. When faced with the impact and friction of materials during screening, it can buffer external forces through its own deformation, reducing material damage caused by stress concentration, thus ensuring the structural integrity of the screen plate under complex working conditions and significantly improving the material's wear resistance.

[0021] This application uses HS-860 high-styrene rubber, whose outstanding characteristic is that it can significantly improve the hardness and wear resistance of rubber materials. High-styrene rubber has a high styrene content, and the styrene segments are relatively rigid. After being uniformly dispersed in the rubber matrix, they build a robust supporting skeleton inside the rubber, increasing the overall hardness of the material. This makes it more difficult to wear during friction with materials, significantly improving the wear resistance of the rubber screen plate and extending its service life. Example

[0022] A wear-resistant and highly flame-retardant rubber screen material is composed of the following components, with 100 parts by weight of rubber as the base: Chloroprene rubber M-40 95 parts; High styrene rubber HS-860 5 parts; Zinc oxide 3 parts; Stearic acid 1 part; Active magnesium oxide R-150 5 parts; Microcrystalline wax 1.5 parts; Antioxidant 4010NA 1 part; Antioxidant RD 1 part; Carbon black N330 40 parts; Nano aluminum hydroxide 30 parts; Antimony trioxide 5 parts; Coated red phosphorus 8 parts; Silica 175 5 parts; Coupling agent KH-550 1 part; Naphthenic oil 10 parts; Accelerator DM 2 parts; Accelerator CZ 1 part; Accelerator DBTU 1 part; Accelerator TMTD 0.5 parts; Sulfur 1.5 parts; The method for preparing the above-mentioned wear-resistant and flame-retardant rubber screen material includes the following steps: Step 1: Ingredients: Prepare the ingredients according to the above weight proportions; Step Two: Plasticizing First, the chloroprene rubber and high-styrene rubber are subjected to plasticizing treatment. The chloroprene rubber and high-styrene rubber are fed into a two-roll mill and passed through a thin mill at room temperature. Through plasticizing, the molecular weight of the rubber can be reduced, its plasticity and fluidity can be increased, making it easier to mix evenly with other compounding agents. During the plasticizing process, the roller gap is controlled at 0.5-1mm, the roller temperature is 50-60℃, and the plasticizing time is 10min, until the rubber surface is smooth and there are no obvious lumps. Step 3: Mixing: The first stage of mixing is carried out using an internal mixer. The chloroprene rubber and high-styrene rubber plasticized in step two are added into the internal mixer according to the formula ratio. Then, active magnesium oxide, stearic acid, microcrystalline wax, antioxidant 4010NA, and antioxidant RD are added in sequence and mixed for 2-5 minutes. Then, carbon black, nano aluminum hydroxide, antimony trioxide, coated red phosphorus, white carbon black, coupling agent, and naphthenic oil are added and mixed for 4-8 minutes. The initial mixing temperature is controlled at 50-70℃, and the discharge temperature is controlled below 110℃. After discharge, the rubber compound is transferred to an open mill for sheeting and cooling to obtain the first stage of compound. Step 4: Second-stage sulfonation: After the temperature of the first-stage compound obtained from step three is reduced to room temperature, zinc oxide, sulfur, accelerator DM, accelerator CZ, accelerator DBTU and accelerator TMTD are added to the open mill and tamped. The roller temperature is controlled at 50-60℃ and the tamping time is 3-5 minutes to ensure uniform tamping and obtain the second-stage compound. Step 5: Cutting the film: The two-stage compounded rubber compound from step four is sheeted using an open mill to prepare wear-resistant and highly flame-retardant rubber sieve material. Step Six: Vulcanization Molding Place the rubber material cut from step five into a mold, and vulcanize it using a flat vulcanizing machine. Set the vulcanization temperature to 140℃, the vulcanization pressure to 15MPa, and the vulcanization time to 30min to obtain the wear-resistant and flame-retardant rubber screen plate. Example

[0023] A wear-resistant and highly flame-retardant rubber screen material is composed of the following components, with 100 parts by weight of rubber as the base: Chloroprene rubber M-40 85 parts; High styrene rubber HS-860 15 parts; Zinc oxide 5 parts; Stearic acid 1.5 parts; Active magnesium oxide R-150 4 parts; Microcrystalline wax 1 part; Antioxidant 4010NA 1.5 parts; Antioxidant RD 1.5 parts; Carbon black N330 30 parts; Nano aluminum hydroxide 40 parts; Antimony trioxide 8 parts; Coated red phosphorus 10 parts; Silica 175 8 parts; Coupling agent KH-550 1.5 parts; Naphthenic oil 15 parts; Accelerator DM 1.5 parts; Accelerator CZ 1.5 parts; Accelerator DBTU 1.5 parts; Accelerator TMTD 0.6 parts; Sulfur 1 part; The method for preparing the above-mentioned wear-resistant and flame-retardant rubber screen material includes the following steps: Step 1: Ingredients: Prepare the ingredients according to the above weight proportions; Step Two: Plasticizing First, the chloroprene rubber and high-styrene rubber are plasticized. The chloroprene rubber and high-styrene rubber are fed into a two-roll mill and passed through a thin mill at room temperature. Through plasticizing, the molecular weight of the rubber can be reduced, its plasticity and fluidity can be increased, making it easier to mix evenly with other compounding agents. During the plasticizing process, the roller gap is controlled at 0.5-1mm, the roller temperature is 50-60℃, and the plasticizing time is 15min, until the rubber surface is smooth and there are no obvious lumps. Step 3: Mixing: The first stage of compounding is carried out using an internal mixer. The chloroprene rubber and high-styrene rubber plasticized in step two are added into the internal mixer according to the formula ratio. Then, active magnesium oxide, stearic acid, microcrystalline wax, antioxidant 4010NA, and antioxidant RD are added in sequence and mixed for 2-5 minutes. Then, carbon black, nano aluminum hydroxide, antimony trioxide, coated red phosphorus, white carbon black, coupling agent, and naphthenic oil are added and mixed for 4-8 minutes. The initial mixing temperature is controlled at 50-70℃, and the discharge temperature is controlled below 110℃. After discharge, the rubber compound is transferred to an open mill for sheeting and cooling to obtain the first stage compound. Step 4: Second-stage sulfonation: After the temperature of the first-stage compound obtained from step three is reduced to room temperature, zinc oxide, sulfur, accelerator DM, accelerator CZ, accelerator DBTU and accelerator TMTD are added to the open mill and tamped. The roller temperature is controlled at 50-60℃ and the tamping time is 3-5 minutes to ensure uniform tamping and obtain the second-stage compound. Step 5: Cutting the film: The two-stage compounded rubber compound from step four is sheeted using an open mill to prepare wear-resistant and highly flame-retardant rubber sieve material. Step Six: Vulcanization Molding The rubber material cut from step five is placed into a mold and vulcanized using a flat vulcanizing machine. The vulcanization temperature is set to 145℃, the vulcanization pressure to 12MPa, and the vulcanization time to 25min, thus obtaining the wear-resistant and flame-retardant rubber screen plate. Example

[0024] A wear-resistant and highly flame-retardant rubber screen material is composed of the following components, with 100 parts by weight of rubber as the base: Chloroprene rubber M-40 65 parts; High styrene rubber HS-860 35 parts; Zinc oxide 6 parts; Stearic acid 2 parts; Active magnesium oxide R-150 3 parts; Microcrystalline wax 0.5 parts; Antioxidant 4010NA 2 parts; Antioxidant RD 2 parts; Carbon black N330 20 parts; Nano aluminum hydroxide 50 parts; Antimony trioxide 10 parts; Coated red phosphorus 12 parts; Silica 175 10 parts; Coupling agent KH-550 2 parts; Naphthenic oil 20 parts; Accelerator DM 0.5 parts; Accelerator CZ 2 parts; Accelerator DBTU 2 parts; Accelerator TMTD 0.8 parts; Sulfur 0.5 parts; The method for preparing the above-mentioned wear-resistant and flame-retardant rubber screen material includes the following steps: Step 1: Ingredients: Prepare the ingredients according to the above weight proportions; Step Two: Plasticizing First, the chloroprene rubber and high-styrene rubber are plasticized. The chloroprene rubber and high-styrene rubber are fed into a two-roll mill and passed through a thin mill at room temperature. Through plasticizing, the molecular weight of the rubber can be reduced, its plasticity and fluidity can be increased, making it easier to mix evenly with other compounding agents. During the plasticizing process, the roller gap is controlled at 0.5-1mm, the roller temperature is 50-60℃, and the plasticizing time is 20min, until the rubber surface is smooth and there are no obvious lumps. Step 3: Mixing: The first stage of compounding is carried out using an internal mixer. The chloroprene rubber and high-styrene rubber plasticized in step two are added into the internal mixer according to the formula ratio. Then, active magnesium oxide, stearic acid, microcrystalline wax, antioxidant 4010NA, and antioxidant RD are added in sequence and mixed for 2-5 minutes. Then, carbon black, nano aluminum hydroxide, antimony trioxide, coated red phosphorus, white carbon black, coupling agent, and naphthenic oil are added and mixed for 4-8 minutes. The initial mixing temperature is controlled at 50-70℃, and the discharge temperature is controlled below 110℃. After discharge, the rubber compound is transferred to an open mill for sheeting and cooling to obtain the first stage compound. Step 4: Second-stage sulfonation: After the temperature of the first-stage compound obtained from step three is reduced to room temperature, zinc oxide, sulfur, accelerator DM, accelerator CZ, accelerator DBTU and accelerator TMTD are added to the open mill and tamped. The roller temperature is controlled at 50-60℃ and the tamping time is 3-5 minutes to ensure uniform tamping and obtain the second-stage compound. Step 5: Cutting the film: The two-stage compounded rubber compound from step four is sheeted using an open mill to prepare wear-resistant and highly flame-retardant rubber sieve material. Step Six: Vulcanization Molding The rubber material cut from step five is placed into a mold and vulcanized using a flat vulcanizing machine. The vulcanization temperature is set to 150℃, the vulcanization pressure to 10MPa, and the vulcanization time to 20min, thus obtaining the wear-resistant and flame-retardant rubber screen plate.

[0025] Comparative Example 1: 100 parts of chloroprene rubber M-40 were used, without the addition of high-styrene rubber HS-860, and the other components and preparation method were the same as in Example 2 of this application; Comparative Example 2: 80 parts of traditional natural rubber and 20 parts of styrene-butadiene rubber were used together, and the other components and preparation methods were the same as in Example 2 of this application; Comparative Example 3: 85 parts of chloroprene rubber M-40 and 15 parts of high-styrene rubber HS-860 were used together, and the flame retardant system consisted of only 80 parts of ordinary aluminum hydroxide. Other components and preparation methods were the same as in Example 2 of this application.

[0026] The performance comparison of various tests on the wear-resistant and flame-retardant rubber sieve materials prepared in Examples 1-3 and Comparative Examples 1-3 of this application is shown in Table 1 below:

[0027] The wear-resistant and flame-retardant rubber screen materials prepared according to Examples 1-3 all meet the requirements. In Comparative Example 1, chloroprene rubber was used alone as the main material, which has excellent flame retardant properties, but poor volumetric wear. In Comparative Example 2, traditional natural rubber and styrene-butadiene rubber were used together, which had poor flame retardant properties, aging properties and volumetric wear. In Comparative Example 3, a common flame retardant system was used, which had poor flame retardant properties.

[0028] Therefore, the advantages of the wear-resistant and flame-retardant rubber screen material of this application are obvious. By using a combination of chloroprene rubber and high-styrene rubber, it solves the problems of poor wear resistance, poor aging resistance and poor flame retardancy of traditional rubber screens while maintaining excellent mechanical properties. This achieves a comprehensive improvement in material performance, extends its service life, and improves safety. It provides beneficial technical support for wear-resistant and flame-retardant rubber screen materials and has broad application prospects. It can be widely used in many industries such as coal, mining, metallurgy, chemical industry, and building materials.

Claims

1. A wear resistant, high flame resistant rubber screen material, characterized by: It consists of the following components, with 100 parts by weight based on rubber: Chloroprene rubber 65-95 parts; high-styrene rubber 5-35 parts; zinc oxide 3-6 parts; stearic acid 1-2 parts; magnesium oxide 3-5 parts; microcrystalline wax 0.5-1.5 parts; Antioxidant 4010NA 1-2 parts; Antioxidant RD 1-2 parts; Carbon black 20-40 parts; Nano aluminum hydroxide 30-50 parts; Antimony trioxide 5-10 parts; Coated red phosphorus 8-12 parts; Silica 5-10 parts; Coupling agent 1-2 parts; Naphthenic oil 10-20 parts; Accelerator DM 0.5-2 parts; Accelerator CZ 1-2 parts; Accelerator DBTU 1-2 parts; Accelerator TMTD 0.5-0.8 parts; Sulfur 0.5-1.5 parts.

2. The abrasion resistant, high flame retardant rubber screen panel material of claim 1, wherein: The chloroprene rubber is electrochemical M-40.

3. The abrasion resistant, high flame retardant rubber screen panel material of claim 1, wherein: The high-styrene rubber is HS-860.

4. The abrasion resistant, high flame retardant rubber screen panel material of claim 1, wherein: The magnesium oxide is highly active magnesium oxide RA-150.

5. The abrasion resistant, high flame retardant rubber screen panel material of claim 1, wherein: The antioxidant 4010NA is N-isopropyl-N'-phenyl-p-phenylenediamine.

6. The wear-resistant and flame-retardant rubber screen material according to claim 1, characterized in that: The antioxidant RD is a 2,2,4-trimethyl-1,2-dihydroquinoline polymer.

7. The wear-resistant and flame-retardant rubber screen material according to claim 1, characterized in that: The carbon black is Cabot carbon black N330.

8. The wear-resistant and flame-retardant rubber screen material according to claim 1, characterized in that: The silica is NEWSIL® 175 silica.

9. The wear-resistant and flame-retardant rubber screen material according to claim 1, characterized in that: The coupling agent is silane coupling agent KH-550.

10. A method for preparing the wear-resistant and flame-retardant rubber sieve material according to claim 1, characterized in that: Includes the following steps: Step 1: Ingredients: Prepare the ingredients according to the following weight proportions: Chloroprene rubber 65-95 parts; high-styrene rubber 5-35 parts; zinc oxide 3-6 parts; stearic acid 1-2 parts; magnesium oxide 3-5 parts; microcrystalline wax 0.5-1.5 parts; Antioxidant 4010NA 1-2 parts; Antioxidant RD 1-2 parts; Carbon black 20-40 parts; Nano aluminum hydroxide 30-50 parts; Antimony trioxide 5-10 parts; Coated red phosphorus 8-12 parts; Silica 5-10 parts; Coupling agent 1-2 parts; Naphthenic oil 10-20 parts; Accelerator DM 0.5-2 parts; Accelerator CZ 1-2 parts; Accelerator DBTU 1-2 parts; Accelerator TMTD 0.5-0.8 parts; Sulfur 0.5-1.5 parts; Step Two: Plasticizing First, the chloroprene rubber and high-styrene rubber are plasticized. The chloroprene rubber and high-styrene rubber are fed into a two-roll mill and passed through a thin mill at room temperature. During the plasticizing process, the roller gap is controlled at 0.5-1mm, the roller temperature is 50-60℃, and the plasticizing time is 10-20min until the rubber surface is smooth and there are no obvious lumps. Step 3: Mixing: The first stage of compounding is carried out using an internal mixer. The chloroprene rubber and high-styrene rubber plasticized in step two are added into the internal mixer according to the formula ratio. Then, magnesium oxide, stearic acid, microcrystalline wax, antioxidant 4010NA, and antioxidant RD are added in sequence and mixed for 2-5 minutes. Then, carbon black, nano aluminum hydroxide, antimony trioxide, coated red phosphorus, white carbon black, coupling agent, and naphthenic oil are added and mixed for 4-8 minutes. The initial mixing temperature is controlled at 50-70℃, and the discharge temperature is controlled below 110℃. After discharge, the rubber compound is transferred to an open mill for sheeting and cooling to obtain the first stage compound. Step 4: Second-stage sulfonation: After the temperature of the first-stage compound obtained from step three is reduced to room temperature, zinc oxide, sulfur, accelerator DM, accelerator CZ, accelerator DBTU and accelerator TMTD are added to the open mill and tamped. The roller temperature is controlled at 50-60℃ and the tamping time is 3-5 minutes to ensure uniform tamping and obtain the second-stage compound. Step 5: Cutting the film: The two-stage compounded rubber compound from step four is sheeted using an open mill to prepare wear-resistant and highly flame-retardant rubber sieve material. Step Six: Vulcanization Molding Place the rubber material cut from step five into a mold, and vulcanize it using a flat vulcanizing machine. Set the vulcanization temperature to 140-150℃, the vulcanization pressure to 10-15MPa, and the vulcanization time to 20-30min to obtain the wear-resistant and flame-retardant rubber screen plate.

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