Anti-adhesion conveying belt material beneficial to drying and preparation method thereof

Abstract

The invention discloses an anti-adhesion conveying belt material beneficial to drying and a preparation method thereof, and belongs to the technical field of conveying belt materials. The anti-adhesion conveying belt material beneficial to drying is prepared from the following raw materials in parts by weight: 40 to 60 parts of polytetrafluoroethylene, 20 to 25 parts of fluorinated silicone rubber, 10 to 15 parts of long-chain branched polypropylene resin, 10 to 15 parts of carbon nanotubes, 25 to 35 parts of ethylene propylene diene monomer, 5 to 7 parts of vulcanizing agent, 2 to 5 parts of accelerant and 2 to 6 parts of anti-aging agent. The components and parts by weight of the conveyor belt material are specifically limited, on one hand, the fluorinated silicone rubber, the polytetrafluoroethylene and the ethylene propylene diene monomer jointly improve the anti-adhesion performance and the heat resistance of the conveyor belt material, and the long-chain branched polypropylene resin and the carbon nano tubes have a synergistic effect, so that the heat conductivity of the conveyor belt is jointly improved, and the drying efficiency is improved;

Description

Technical Field

[0001] The present application relates to a conveyor belt material that is anti-adhesive and conducive to drying and a preparation method thereof, belonging to the technical field of conveyor belt materials. Background Art

[0002] The conveyor belt is a key component of a belt dryer. Materials in various forms, such as lumps, granules, and powders, are typically placed on the conveyor belt and transported for drying. However, materials with high humidity, especially those with high viscosity, tend to adhere to the conveyor belt surface. This can be time-consuming and laborious to clean, significantly reducing drying efficiency. Furthermore, adhered materials can cause wear and tear on the conveyor belt, shortening its service life.

[0003] In the existing technology, this problem is usually solved by adding an additional layer of structure on the upper layer of the conveyor belt to improve its anti-adhesion properties. However, this solution will affect the thermal conductivity of the conveyor belt, and thus affect the drying efficiency. Therefore, how to achieve both thermal conductivity and anti-adhesion properties is a technical problem that needs to be solved. Summary of the Invention

[0004] In order to solve the above problems, a conveyor belt material that is anti-adhesive and easy to dry and a preparation method thereof are provided. By making specific restrictions on the component composition and weight proportions of the conveyor belt material, on the one hand, fluorosilicone rubber, polytetrafluoroethylene, and EPDM rubber jointly improve the anti-adhesion and heat resistance of the conveyor belt material, and long-chain branched polypropylene resin and carbon nanotubes work synergistically to jointly improve the thermal conductivity of the conveyor belt and improve the drying efficiency.

[0005] According to one aspect of the present application, the present application provides an anti-adhesion and easy-to-dry conveyor belt material, comprising the following raw materials in parts by weight: 40 to 60 parts of polytetrafluoroethylene, 20 to 25 parts of fluorosilicone rubber, 10 to 15 parts of long-chain branched polypropylene resin, 10 to 15 parts of carbon nanotubes, 25 to 35 parts of EPDM rubber, 5 to 7 parts of vulcanizing agent, 2 to 5 parts of accelerator and 2 to 6 parts of antioxidant.

[0006] Optionally, the long-chain branched polypropylene resin comprises, by weight, 100 parts of polypropylene, 0.1-1 parts of initiator, 0.5-5 parts of first grafting monomer, 0.2-5 parts of second grafting monomer, 0.1-1.5 parts of antioxidant, 0.5-1 parts of grafting aid and 0.4-0.8 parts of CHB-5.

[0007] Optionally, the first grafting monomer is maleic anhydride, which is pretreated; and the second grafting monomer includes one or more of 4-vinylguaiacol, 4-vinylphenol, styrenated phenol or 3,4-dihydroxystyrene.

[0008] Optionally, the pretreatment of maleic anhydride comprises the following steps:

[0009] S1: drying graphene oxide and maleic anhydride in vacuum at 30-35°C for 1-2h;

[0010] S2 adding acetone to the dried graphene oxide and maleic anhydride and grinding to obtain a mixture;

[0011] S3 The mixture was dried under vacuum at 30-35°C for 1-2 h.

[0012] Optionally, the grafting aid includes dithiocarbamate and triallyl cyanurate, wherein the dithiocarbamate includes one or more of zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, and zinc dibutyldithiocarbamate.

[0013] Optionally, the initiator includes one or more of diisopropylbenzene peroxide, isopropylbenzene peroxide, tert-butyl hydroperoxide, bis(tert-butylperoxide)diisopropylbenzene, 2,5-dimethyl-2,5-bis(tert-butylperoxide)hexane, 2,5-dimethyl-2,5-bis(tert-butylperoxide)-3-hexyne, azobisisopropylimidazoline hydrochloride and azobisisobutylamidine hydrochloride; the antioxidant includes one or more of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol, 1,3,5- At least one of trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecyl ester, 4,4'-thiobis(6-tert-butyl-3-methylphenol), and bis(3,5-di-tert-butyl-4-hydroxy-phenylpropionyl)hydrazine.

[0014] Specifically, the vulcanizing agent is sulfur, the accelerator is one or more of accelerator DM, accelerator D, accelerator M, accelerator TT, and accelerator CE; and the antioxidant is at least one of antioxidant DNP, antioxidant TMQ, antioxidant 4020, antioxidant 4010, antioxidant 4010NA, antioxidant RD, and antioxidant BLE.

[0015] Optionally, the mass ratio of the dithiocarbamate to triallyl cyanurate is 1:

[0016] (1~1.5).

[0017] Specifically, the preparation method of long-chain branched polypropylene resin comprises the following steps:

[0018] S01: placing polypropylene, an initiator, a first grafting monomer, a second grafting monomer, an antioxidant, a grafting aid, and CHB-5 in a mixer and mixing them uniformly, first at a low speed and then at a high speed to obtain a mixture;

[0019] S02 adds the mixture into a twin-screw extruder for melting reaction and extrusion into granules.

[0020] Specifically, in S01, the low-speed blending is performed at a rotation speed of 300 to 500 rpm and stirring for 5 to 10 minutes; the high-speed blending is performed at a rotation speed of 1000 to 1500 rpm and stirring for 10 to 15 minutes.

[0021] Specifically, in S02, the screw speed is 200-400 rpm, and the melting temperature is 160-200°C.

[0022] According to another aspect of the present application, the present application also provides a method for preparing the above-mentioned anti-adhesion and easy-to-dry conveyor belt material, comprising the following steps:

[0023] (1) placing polytetrafluoroethylene, fluorosilicone rubber, long-chain branched polypropylene resin, and EPDM rubber in a high-speed mixer and stirring for 10 to 15 minutes to mix uniformly to obtain a preliminary mixture;

[0024] (2) adding carbon nanotubes to DMF and ultrasonicating at 30-40 kHz for 30-60 min to obtain a carbon nanotube dispersion;

[0025] (3) adding the carbon nanotube dispersion to the preliminary mixture, continuing to stir for 10 to 15 minutes, adding the antioxidant, and continuing to stir for 5 to 10 minutes to form a mixture;

[0026] (4) Place the mixture in an internal mixer, add a vulcanizing agent and an accelerator, and knead at 80-100°C for 30 minutes to form a rubber compound;

[0027] (5) Extruding the rubber material through an extruder at a temperature of 150-180°C and cooling to set the shape;

[0028] (6) Place the conveyor belt material in a vulcanizing device for vulcanization to obtain a conveyor belt material that is anti-adhesive and easy to dry.

[0029] Optionally, in step (2), the mass ratio of carbon nanotubes to DMF is 1:(40-50).

[0030] Optionally, in step (6), the vulcanization temperature is 150-180° C., and the vulcanization time is 30-60 min.

[0031] The beneficial effects of this application include but are not limited to:

[0032] 1. According to the anti-adhesion and easy-to-dry conveyor belt material of the present application, by making specific restrictions on the component composition and weight proportions of the conveyor belt material, on the one hand, fluorosilicone rubber, polytetrafluoroethylene, and EPDM rubber jointly improve the anti-adhesion and heat resistance of the conveyor belt material, and the long-chain branched polypropylene resin and carbon nanotubes work synergistically to jointly improve the thermal conductivity of the conveyor belt and improve the drying efficiency.

[0033] 2. According to the present invention, the anti-adhesion and easy-to-dry conveyor belt material is obtained by grafting polypropylene to obtain a long-chain branched polypropylene resin. The present invention defines the preparation method of the long-chain branched polypropylene resin. Maleic anhydride is pretreated with graphene oxide to undergo esterification and hydrogen bonding. Maleic anhydride is inserted into the interlayers of the graphene oxide or adsorbed on its surface to obtain a composite of graphene oxide and maleic anhydride, which can inhibit the degradation of polypropylene. However, the grafting rate of maleic anhydride is also slightly affected. The grafting rate is increased by adding a second grafting monomer and a grafting aid. The second grafting monomer is grafted onto the polypropylene molecule via a double bond, which can also inhibit the degradation of polypropylene. The grafting aids dithiocarbamate and triallyl cyanurate act in combination in a specific mass ratio. On the one hand, the grafting aid reacts with active free radicals to deactivate the free radicals, inhibiting polypropylene degradation and promoting grafting and branching reactions. On the other hand, the grafting aid connects with macromolecular free radicals and maleic anhydride at the same time, synergistically improving the grafting rate to obtain a long-chain branched polypropylene resin.

[0034] 3. According to the preparation method of the anti-adhesion and easy-to-dry conveyor belt material of the present application, the preparation method is simple and easy to operate, and the process steps and process parameters are limited to obtain a conveyor belt material with excellent anti-adhesion performance and easy to dry. DETAILED DESCRIPTION

[0035] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0036] Unless otherwise specified, the raw materials in the examples and comparative examples of the present application were purchased through commercial channels.

[0037] Unless otherwise specified, the methods used in the examples and comparative examples of the present application are conventional methods in the prior art.

[0038] Example 1

[0039] Pretreatment with maleic anhydride:

[0040] S1: Graphene oxide and maleic anhydride were dried under vacuum at 30 °C for 1 h.

[0041] S2 adding acetone to the dried graphene oxide and maleic anhydride and grinding to obtain a mixture;

[0042] S3 The mixture was dried under vacuum at 30 °C for 1 h.

[0043] Preparation of long-chain branched polypropylene resin:

[0044] S01: 100 parts of polypropylene, 0.1 parts of initiator dicumyl peroxide, 0.5 parts of pretreated maleic anhydride, 5 parts of the second grafting monomer 4-vinylguaiacol, 0.1 parts of antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol, 0.5 parts of grafting aid, the grafting aid includes zinc dimethyldithiocarbamate and triallyl cyanurate, the mass ratio of the two is 1:1, and 0.4 parts of CHB-5 are placed in a mixer and mixed evenly, first at low speed and then at high speed to obtain a mixture; the low speed blending is at a speed of 300 rpm and stirred for 5 minutes; the high speed blending is at a speed of 1000 rpm and stirred for 10 minutes;

[0045] S02: Add the mixture into a twin-screw extruder for melting reaction and extrusion granulation. The screw speed is 200 rpm and the melting temperature is 160°C.

[0046] Preparation of a conveyor belt material that is anti-adhesive and easy to dry:

[0047] (1) 40 parts of polytetrafluoroethylene, 20 parts of fluorosilicone rubber, 10 parts of long-chain branched polypropylene resin, and 25 parts of EPDM rubber were placed in a high-speed mixer and stirred for 10 minutes to mix uniformly to obtain a preliminary mixture;

[0048] (2) adding 10 parts of carbon nanotubes to DMF at a mass ratio of carbon nanotubes to DMF of 1:40, and ultrasonicating at 30 kHz for 30 min to obtain a carbon nanotube dispersion;

[0049] (3) adding the carbon nanotube dispersion to the preliminary mixture, continuing stirring for 10 minutes, adding 2 parts of the antioxidant DNP, and continuing stirring for 5 minutes to form a mixture;

[0050] (4) Place the mixture in an internal mixer, add 5 parts of sulfur as a vulcanizing agent and 2 parts of DM as an accelerator, and knead at 80°C for 30 minutes to form a rubber compound;

[0051] (5) Extruding the rubber compound through an extruder at a temperature of 150°C and cooling to set;

[0052] (6) Place the material in a vulcanizing device for vulcanization at a temperature of 150° C. for 30 minutes to obtain a conveyor belt material that is anti-adhesive and easy to dry.

[0053] Example 2

[0054] Pretreatment with maleic anhydride:

[0055] S1: Graphene oxide and maleic anhydride were dried under vacuum at 35 °C for 2 h.

[0056] S2 adding acetone to the dried graphene oxide and maleic anhydride and grinding to obtain a mixture;

[0057] S3 The mixture was dried under vacuum at 35°C for 2 h.

[0058] Preparation of long-chain branched polypropylene resin:

[0059] S01: 100 parts of polypropylene, 1 part of initiator cumene peroxide, 5 parts of pretreated maleic anhydride, 5 parts of the second grafting monomer 4-vinylphenol, 1.5 parts of antioxidant 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 1 part of grafting aid, the grafting aid includes zinc dimethyldithiocarbamate and triallyl cyanurate, the mass ratio of the two is 1:1.5, and 0.8 parts of CHB-5 are placed in a mixer and mixed evenly, first at low speed and then at high speed to obtain a mixture; the low speed blending is at a speed of 500 rpm and stirred for 10 minutes; the high speed blending is at a speed of 1500 rpm and stirred for 15 minutes;

[0060] S02 adds the mixture into a twin-screw extruder for melting reaction and extrusion granulation. The screw speed is 400 rpm and the melting temperature is 200°C.

[0061] Preparation of a conveyor belt material that is anti-adhesive and easy to dry:

[0062] (1) 60 parts of polytetrafluoroethylene, 25 parts of fluorosilicone rubber, 15 parts of long-chain branched polypropylene resin, and 35 parts of EPDM rubber were placed in a high-speed mixer and stirred for 15 minutes to mix uniformly to obtain a preliminary mixture;

[0063] (2) adding 15 parts of carbon nanotubes to DMF at a mass ratio of carbon nanotubes to DMF of 1:50, and ultrasonicating at 40 kHz for 60 min to obtain a carbon nanotube dispersion;

[0064] (3) adding the carbon nanotube dispersion to the preliminary mixture, continuing stirring for 15 minutes, adding 6 parts of the antioxidant TMQ, and continuing stirring for 10 minutes to form a mixture;

[0065] (4) Place the mixture in an internal mixer, add 7 parts of sulfur as a vulcanizing agent and 5 parts of accelerator M, and knead at 100°C for 30 minutes to form a rubber compound;

[0066] (5) Extruding the rubber compound through an extruder at a temperature of 180°C and cooling to set the shape;

[0067] (6) Place the material in a vulcanizing device for vulcanization at a vulcanization temperature of 180° C. for 60 min to obtain a conveyor belt material that is anti-adhesive and easy to dry.

[0068] Example 3

[0069] Pretreatment with maleic anhydride:

[0070] S1: Graphene oxide and maleic anhydride were dried under vacuum at 33 °C for 1.5 h.

[0071] S2 adding acetone to the dried graphene oxide and maleic anhydride and grinding to obtain a mixture;

[0072] S3 The mixture was dried under vacuum at 33°C for 1.5 h.

[0073] Preparation of long-chain branched polypropylene resin:

[0074] S01 100 parts of polypropylene, 0.5 parts of initiator 2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane, 3 parts of pretreated maleic anhydride, 3 parts of the second grafting monomer styrenated phenol, 3 parts of antioxidant N,N

[0075] 1 part of '-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, 0.8 parts of a grafting aid, wherein the grafting aid includes zinc dimethyldithiocarbamate and triallyl cyanurate, and the mass ratio of the two is 1:1.5, 0.5 parts of CHB-5 are placed in a mixer and mixed evenly, first at a low speed and then at a high speed to obtain a mixture; the low speed blending is at a speed of 400 rpm and stirred for 10 minutes; the high speed blending is at a speed of 1500 rpm and stirred for 15 minutes;

[0076] S02 adds the mixture into a twin-screw extruder for melting reaction and extrusion granulation. The screw speed is 400 rpm and the melting temperature is 180°C.

[0077] Preparation of a conveyor belt material that is anti-adhesive and easy to dry:

[0078] (1) 50 parts of polytetrafluoroethylene, 20 parts of fluorosilicone rubber, 15 parts of long-chain branched polypropylene resin, and 30 parts of EPDM rubber were placed in a high-speed mixer and stirred for 10 minutes to mix uniformly to obtain a preliminary mixture;

[0079] (2) adding 15 parts of carbon nanotubes to DMF at a mass ratio of carbon nanotubes to DMF of 1:45, and ultrasonicating at 35 kHz for 40 min to obtain a carbon nanotube dispersion;

[0080] (3) adding the carbon nanotube dispersion to the preliminary mixture, continuing stirring for 15 minutes, adding 4 parts of the antioxidant BLE, and continuing stirring for 10 minutes to form a mixture;

[0081] (4) The mixture was placed in an internal mixer, 6 parts of sulfur as a vulcanizing agent and 4 parts of DM as an accelerator were added, and the mixture was kneaded at 90°C for 30 minutes to form a rubber compound;

[0082] (5) Extruding the rubber compound through an extruder at a temperature of 160°C and cooling to set the shape;

[0083] (6) Place the material in a vulcanizing device for vulcanization at a vulcanization temperature of 160° C. for 30 min to obtain a conveyor belt material that is anti-adhesive and easy to dry.

[0084] Example 4

[0085] The difference between Example 4 and Example 3 is that the long-chain branched polypropylene resin does not include the second grafting monomer, and the rest are the same.

[0086] Example 5

[0087] The difference between Example 5 and Example 3 is that the first grafting monomer maleic anhydride in the long-chain branched polypropylene resin is not pretreated, and the rest are the same.

[0088] Example 6

[0089] The difference between Example 6 and Example 3 is that the long-chain branched polypropylene resin does not include a grafting auxiliary agent, and the rest are the same.

[0090] Example 7

[0091] The difference between Example 7 and Example 3 is that in the long-chain branched polypropylene resin, the mass ratio of the grafting auxiliary agent dithiocarbamate and triallyl cyanurate is 1:3, and the rest are the same.

[0092] Comparative Example 1

[0093] The difference between Comparative Example 1 and Example 3 is that fluorosilicone rubber is not included, and the rest are the same.

[0094] Comparative Example 2

[0095] The difference between Comparative Example 2 and Example 3 is that long-chain branched polypropylene resin is not included, and the rest are the same.

[0096] Comparative Example 3

[0097] The difference between Comparative Example 3 and Example 3 is that carbon nanotubes are not included, and the rest are the same.

[0098] Experimental Example 1

[0099] The performance test of the conveyor belt materials obtained in Examples 1 to 7 and Comparative Examples 1 to 3 was carried out, wherein:

[0100] Thermal conductivity testing was conducted in accordance with GB / T15022.2-2007. For high-temperature resistance testing, 3mm thick strips of the aforementioned conveyor belt material were cut transversely as standard specimens. These strips were then placed in an oven at a heating rate of 2°C / min, starting from room temperature. A test load of 1.82 MPa was applied. The temperature at which the standard specimen deflection changed by 0.21 mm was recorded as the heat distortion temperature. The test results are shown in Table 1.

[0101] Group Thermal conductivity (W / m·K) Thermal deformation softening point (℃) Water contact angle (°) Example 1 3.3 323 4.8 Example 2 3.2 321 5.0 Example 3 3.4 326 4.5 Example 4 2.4 278 10.7 Example 5 2.2 305 6.8 Example 6 2.5 281 10.5 Example 7 2.7 311 5.7 Comparative Example 1 3.0 236 15.2 Comparative Example 2 1.8 304 11.7 Comparative Example 3 1.5 307 13.2

[0102] The conveyor belt material provided in this application has good thermal conductivity, which is beneficial to improving drying efficiency, and has excellent high temperature resistance and anti-adhesion properties.

[0103] The foregoing is merely an embodiment of the present application, and the scope of protection of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the technical ideas and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A conveyor belt material that is anti-adhesive and easy to dry, characterized in that: The invention comprises the following raw materials in parts by weight: 40-60 parts of polytetrafluoroethylene, 20-25 parts of fluorosilicone rubber, 10-15 parts of long-chain branched polypropylene resin, 10-15 parts of carbon nanotubes, 25-35 parts of EPDM rubber, 5-7 parts of vulcanizing agent, 2-5 parts of accelerator and 2-6 parts of antioxidant.

2. The anti-adhesion and easy-to-dry conveyor belt material according to claim 1, characterized in that: The long-chain branched polypropylene resin comprises, by weight, 100 parts of polypropylene, 0.1-1 parts of initiator, 0.5-5 parts of first grafting monomer, 0.2-5 parts of second grafting monomer, 0.1-1.5 parts of antioxidant, 0.5-1 parts of grafting aid and 0.4-0.8 parts of CHB-5.

3. The anti-adhesion and easy-to-dry conveyor belt material according to claim 2, characterized in that: The first grafting monomer is maleic anhydride, which is pretreated; the second grafting monomer includes one or more of 4-vinylguaiacol, 4-vinylphenol, styrenated phenol or 3,4-dihydroxystyrene.

4. The conveyor belt material that prevents adhesion and facilitates drying according to claim 3, characterized in that: The pretreatment of the maleic anhydride comprises the following steps: S1: drying graphene oxide and maleic anhydride in vacuum at 30-35°C for 1-2h; S2 adding acetone to the dried graphene oxide and maleic anhydride and grinding to obtain a mixture; S3 The mixture was dried under vacuum at 30-35°C for 1-2 h.

5. The conveyor belt material that prevents adhesion and facilitates drying according to claim 2, characterized in that: The grafting auxiliary agent includes dithiocarbamate and triallyl cyanurate, wherein the dithiocarbamate includes one or more of zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, and zinc dibutyldithiocarbamate.

6. The conveyor belt material that prevents adhesion and facilitates drying according to claim 2, characterized in that: The initiator includes one or more of diisopropylbenzene peroxide, isopropylbenzene peroxide, tert-butyl hydroperoxide, bis(tert-butylperoxide)diisopropylbenzene, 2,5-dimethyl-2,5-bis(tert-butylperoxide)hexane, 2,5-dimethyl-2,5-bis(tert-butylperoxide)-3-hexyne, azodiisopropylimidazoline hydrochloride and azodiisobutylamidine hydrochloride; the antioxidant includes one or more of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, Tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, N,N'-bis-(3-(3,5-di-tert-butyl) β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecyl At least one of alcohol ester, 4,4'-thiobis(6-tert-butyl-3-methylphenol), and bis(3,5-di-tert-butyl-4-hydroxy-phenylpropionyl)hydrazine.

7. The conveyor belt material that prevents adhesion and facilitates drying according to claim 5, characterized in that: The mass ratio of the dithiocarbamate to triallyl cyanurate is 1:(1-1.5).

8. The method for preparing a conveyor belt material that is anti-adhesive and facilitates drying according to any one of claims 1 to 7, characterized in that: The following steps are included (1) placing polytetrafluoroethylene, fluorosilicone rubber, long-chain branched polypropylene resin, and EPDM rubber in a high-speed mixer and stirring for 10 to 15 minutes to mix uniformly to obtain a preliminary mixture; (2) adding carbon nanotubes to DMF and ultrasonicating at 30-40 kHz for 30-60 min to obtain a carbon nanotube dispersion; (3) adding the carbon nanotube dispersion to the preliminary mixture, continuing to stir for 10 to 15 minutes, adding the antioxidant, and continuing to stir for 5 to 10 minutes to form a mixture; (4) Place the mixture in an internal mixer, add a vulcanizing agent, an accelerator, and an antioxidant, and knead at 80-100°C for 30 minutes to form a rubber compound; (5) Extruding the rubber material through an extruder at a temperature of 150-180°C and cooling to set the shape; (6) Place the conveyor belt material in a vulcanizing device for vulcanization to obtain a conveyor belt material that is anti-adhesive and easy to dry.

9. The method for preparing a conveyor belt material that is anti-adhesive and easy to dry according to claim 8, characterized in that: The mass ratio of carbon nanotubes to DMF in step (2) is 1:(40-50).

10. The method for preparing a conveyor belt material that is anti-adhesive and easy to dry according to claim 8, characterized in that: In step (6), the vulcanization temperature is 150-180° C., and the vulcanization time is 30-60 minutes.