Flame retardant and cut-resistant aramid conveyor belt and preparation method thereof

Abstract

The present invention provides a flame retardant and cut resistant aramid conveyor belt and a preparation method thereof, the conveyor belt comprising an aramid core layer, a rubber layer arranged on the core layer and a covering rubber layer arranged on the rubber layer; the core layer is interwoven by aramid fiber and flame retardant fiber; the rubber layer comprises styrene-butadiene rubber, natural rubber, reinforcing filler, active agent, antioxidant, plasticizer, adhesive, vulcanizer; the covering rubber layer comprises styrene-butadiene rubber, high styrene rubber, cut resistant resin, reinforcing filler, active agent, silane coupling agent, plasticizer, antioxidant, flame retardant, vulcanizer. The conveyor belt of the present invention can effectively solve the problem of insufficient cut resistance of existing flame retardant conveyor belts, and has excellent flame retardancy, strong cut resistance, good adhesion and high strength, etc., meets the requirements of special industries for high performance of conveyor belts, improves production safety and efficiency, prolongs the service life of conveyor belts and reduces maintenance costs, and has good application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of rubber conveyor belts, and in particular to a flame-retardant and cut-resistant aramid conveyor belt and a preparation method thereof. Background Art

[0002] With the rapid development of global industry, conveyor belts are increasingly used in industrial transportation fields such as coal mines, power plants, cement, steel, and mines. Due to the continuous increase in mechanical transmission speed and the repeated occurrence of some special extreme working conditions, higher requirements are placed on the quality and performance of conveyor belts. Generally speaking, according to the different characteristics of the materials transported by the conveyor belt, the conveyor belt needs to have special properties such as wear resistance, impact resistance, cutting resistance, anti-adhesion, and flame retardancy to be suitable for transportation under specific working conditions. Under extreme working conditions, due to material wear, impact, temperature aging, or powder accumulation, the conveyor belt product will wear and collapse on the surface of the covering rubber of the transported material after a period of operation, exposing the skeleton material, and the conveyor belt will fail and need to be replaced in time. For example, in the process of coal mining, a large amount of coal gangue often appears. Large pieces of coal gangue will have a greater impact on the conveyor belt, which is very easy to cut and damage the conveyor belt, significantly shortening the service life of the conveyor belt.

[0003] There are two main types of flame-retardant conveyor belts commonly used in coal mines: one is a flame-retardant steel cord conveyor belt for coal mines, and the other is a fabric whole-core flame-retardant conveyor belt for coal mines. The flame-retardant steel cord conveyor belt uses steel cord as the warp skeleton material, has poor chemical corrosion resistance, heavy weight, high energy consumption, and is easy to tear in the longitudinal direction. The fabric whole-core flame-retardant conveyor belt mainly uses a whole belt core woven with polyester and cotton yarn as the warp and weft. Compared with the steel cord conveyor belt, it is light in weight, has good tear resistance, but is weaker in strength.

[0004] Aramid is the strongest organic fiber currently used, and has the advantages of high temperature resistance, fire retardancy, low density, low shrinkage, wear resistance, and chemical corrosion resistance. It is an ideal skeleton material for preparing high-strength conveyor belts. Existing aramid conveyor belts often use multiple layers of aramid canvas as skeleton materials, and the layers are bonded with adhesive. However, the more layers the conveyor belt has, the more likely it is to delaminate, and the shorter its service life.

[0005] In addition, the industry also improves the performance of conveyor belts through the formulation design of rubber materials and the design of conveyor belt skeleton structures. For example, there is a technology that uses rigid materials to improve the impact resistance and cutting resistance of the covering rubber material, but the currently used materials have problems such as the rigid materials are easy to crack, easy to separate from the rubber material, the transported powder adheres to the surface of the conveyor belt and embeds in the rigid material, and the rigid material that falls off affects the transported materials. Therefore, the flame-retardant conveyor belts currently on the market have certain defects in terms of cutting resistance and cannot meet the needs of the above special industries. Summary of the invention

[0006] In view of the above-mentioned insufficient production capacity in the prior art, the inventors have developed a flame-retardant and cut-resistant aramid conveyor belt and a preparation method thereof through continuous exploration and research, so as to solve the problem of insufficient cut-resistant performance of the existing flame-retardant conveyor belt.

[0007] Specifically, the technical solution adopted by the present invention is:

[0008] The present invention provides a flame-retardant and cut-resistant aramid conveyor belt, which comprises an aramid core layer, a rubber layer arranged on the aramid core layer, and a covering rubber layer arranged on the rubber layer, wherein the aramid core layer is formed by interweaving aramid fibers and flame-retardant fibers;

[0009] The adhesive layer comprises: by weight, 40-70 parts of styrene-butadiene rubber, 30-60 parts of natural rubber, 35-50 parts of reinforcing filler, 4-6 parts of activator, 3-6 parts of antioxidant, 5-10 parts of plasticizer, 5-8 parts of adhesive, and 2.5-4.5 parts of vulcanizer;

[0010] The covering rubber layer includes, by weight, 80-90 parts of styrene-butadiene rubber, 10-20 parts of high styrene rubber, 1-5 parts of cut-resistant resin, 50-80 parts of reinforcing filler, 6-8 parts of activator, 4-8 parts of silane coupling agent, 4-8 parts of plasticizer, 3-6 parts of antioxidant, 25-35 parts of flame retardant, and 2-4 parts of vulcanizer.

[0011] Furthermore, in the flame-retardant and cut-resistant aramid conveyor belt described in the present invention, the reinforcing filler is selected from one or more of white carbon black, carbon black N220, carbon black N330, and carbon black N550.

[0012] Further, in the flame retardant and cut resistant aramid conveyor belt of the present invention, the active agent is nano zinc oxide and stearic acid. Preferably, in the flame retardant and cut resistant aramid conveyor belt of the present invention, the adhesive is a mixture of adhesive RA and adhesive RS.

[0013] Furthermore, in the flame-retardant and cut-resistant aramid conveyor belt described in the present invention, the antioxidant is selected from one or more of antioxidant RD, antioxidant 6PPD, antioxidant microcrystalline wax, and antioxidant BLE.

[0014] Furthermore, in the flame-retardant and cut-resistant aramid conveyor belt of the present invention, the plasticizer is selected from one or both of coumarone resin and aromatic oil.

[0015] Furthermore, in the flame-retardant and cut-resistant aramid conveyor belt of the present invention, the flame retardant is selected from one or more of aluminum hydroxide, chlorinated paraffin, antimony trioxide, and ammonium polyphosphate.

[0016] Furthermore, in the flame retardant and cut resistant aramid conveyor belt of the present invention, the cut resistant resin is selected from one or more of dicyclopentadiene phenolic resin KPE-F6095, dicyclopentadiene phenolic resin KPE-F6115 or dicyclopentadiene phenolic resin KPE-F6135. Preferably, in the flame retardant and cut resistant aramid conveyor belt of the present invention, the silane coupling agent is Si69.

[0017] Furthermore, in the flame-retardant and cut-resistant aramid conveyor belt of the present invention, the vulcanizing agent is selected from one or more of sulfur, accelerator CZ, accelerator NS or accelerator M.

[0018] On the other hand, the present invention provides a method for preparing the flame retardant and cut resistant aramid conveyor belt, the method comprising the following steps:

[0019] Step 1: Preparation of the belt core layer: aramid fiber and flame retardant fiber are blended in a certain proportion, and then the aramid belt core layer is made by a weaving process;

[0020] Step 2, preparation of covering rubber layer: by weight, add 80-90 parts of styrene-butadiene rubber and 10-20 parts of high styrene rubber into an internal mixer, then add 6-8 parts of active agent, 1-5 parts of anti-cutting resin, 4-8 parts of silane coupling agent, 4-8 parts of plasticizer, 3-6 parts of antioxidant, 25-35 parts of flame retardant, 50-80 parts of reinforcing filler, and perform one-stage mixing to obtain a first-stage mixed rubber; after standing for 8 hours, add 2-4 parts of vulcanizing agent, perform two-stage mixing to obtain covering rubber;

[0021] Step 3, preparation of the rubber layer: by weight, add 40-70 parts of styrene-butadiene rubber and 30-60 parts of natural rubber into an internal mixer, then add 4-6 parts of activator, 3-6 parts of antioxidant, 5-10 parts of plasticizer, 5-8 parts of adhesive, and 35-50 parts of reinforcing filler; after standing for 8 hours, add 2.5-4.5 parts of vulcanizer, perform two-stage mixing, and obtain the rubber layer;

[0022] Step 4, compounding and vulcanization: the adhesive tape obtained in step 3 is laminated to the aramid belt core through a four-roll calender to obtain an adhesive tape; the covering rubber obtained in step 2 is processed through a cold feed pin extruder to obtain a covering rubber film, and then the adhesive tape and the covering rubber film are compounded to obtain a flame-retardant and cut-resistant aramid conveyor belt embryo, which is then vulcanized to obtain a flame-retardant and cut-resistant aramid conveyor belt finished product.

[0023] Furthermore, in the preparation method of the flame-retardant and cut-resistant aramid conveyor belt described in the present invention, the mixing temperature of the first mixing in step 2 is 125-140°C, and the mixing time is 240-300s; the mixing temperature of the second mixing is 90-110°C, and the mixing time is 120-180s.

[0024] Preferably, in the method for preparing the flame-retardant and cut-resistant aramid conveyor belt described in the present invention, the mixing temperature of the first mixing in step three is 140-150°C, and the mixing time is 200-270s; the mixing temperature of the second mixing is 90-105°C, and the mixing time is 120-180s.

[0025] Preferably, in the method for preparing the flame-retardant and cut-resistant aramid conveyor belt of the present invention, the roller temperature of the four-roll calender in step 4 is 90-110° C., and the calendering speed is 5-8 m / s.

[0026] The advantages and beneficial effects of the present invention are:

[0027] (1) The flame-retardant and cut-resistant aramid conveyor belt of the present invention has excellent flame-retardant properties, can effectively reduce the risk of fire, and can effectively prevent the spread of fire when a fire occurs, thereby improving production safety.

[0028] (2) The flame-retardant and cut-resistant aramid conveyor belt of the present invention has strong cut-resistant performance, which can effectively prevent the conveyor belt from being damaged by impact and cutting by sharp heavy objects during use, thereby extending the service life of the conveyor belt.

[0029] (3) The flame-retardant and cut-resistant aramid conveyor belt described in the present invention uses aramid fiber and flame-retardant fiber as the belt core layer, has the characteristics of high strength and high modulus, and can withstand large tension and load; and the bonding strength between the covering rubber layer and the cloth layer of the conveyor belt described in the present invention is close to or even better than that of conventional aramid conveyor belts, and the bonding performance is excellent, ensuring the stability of the conveyor belt structure.

[0030] (4) The method for preparing the flame-retardant and cut-resistant aramid conveyor belt of the present invention is simple, reduces production costs, improves production efficiency, and is easy to realize industrial production. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with preferred specific embodiments. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention. The raw materials, reagents, equipment, etc. used in the following embodiments are all commercially available or conventionally available.

[0032] Example 1

[0033] A flame retardant and cut resistant aramid conveyor belt, the preparation method of which comprises the following steps:

[0034] Step 1: Preparation of the core layer: aramid fiber and flame retardant fiber are blended in a ratio of 1:1, and then the aramid core layer is made through a weaving process.

[0035] Step 2, preparation of covering rubber layer: by weight, 80 parts of styrene-butadiene rubber and 20 parts of high styrene rubber are added to an internal mixer, followed by 5 parts of nano zinc oxide and 1 part of stearic acid, 3 parts of anti-cutting resin (dicyclopentadiene phenolic resin KPE-F6095), 6 parts of silane coupling agent Si69, 3 parts of coumarone resin and 3 parts of aromatic oil, 2 parts of antioxidant RD, 2 parts of antioxidant 6PPD, 2 parts of antioxidant microcrystalline wax, 5 parts of flame retardant aluminum hydroxide, 20 parts of flame retardant chlorinated paraffin, 5 parts of flame retardant antimony trioxide, 40 parts of white carbon black, and 20 parts of carbon black N220, and mixing at 130°C for one stage for 270s; after parking for 8h, 1.5 parts of sulfur and 1.5 parts of accelerator CZ are added, and mixing is carried out at 100°C for two stages for 150s to obtain covering rubber.

[0036] Step 3, preparation of the rubber layer: by weight, 50 parts of styrene-butadiene rubber and 50 parts of natural rubber are added to an internal mixer, followed by 3 parts of nano zinc oxide and 2 parts of stearic acid, 2 parts of antioxidant RD and 2 parts of antioxidant BLE, 3 parts of coumarone resin and 5 parts of aromatic oil, 4 parts of adhesive RA and 2 parts of adhesive RS, 10 parts of white carbon black and 35 parts of carbon black N330, and a first-stage mixing is carried out at a mixing temperature of 145°C and a mixing time of 240s to obtain a first-stage mixed rubber; after standing for 8 hours, 2 parts of sulfur and 1.5 parts of accelerator M are added, and a second-stage mixing is carried out at a mixing temperature of 95°C and a mixing time of 160s to obtain a rubber layer.

[0037] Step 4, compounding and vulcanization: the adhesive tape obtained in step 3 is laminated with the aramid belt core through a four-roll calender (roller temperature is 100°C, calendering speed is 6m / s) to obtain an adhesive tape; the covering rubber obtained in step 2 is processed through a cold feed pin extruder to obtain a covering rubber film, and then the adhesive tape and the covering rubber film are compounded to obtain a flame-retardant and cut-resistant aramid conveyor belt blank, which is then vulcanized to obtain a flame-retardant and cut-resistant aramid conveyor belt finished product.

[0038] Example 2

[0039] A flame retardant and cut resistant aramid conveyor belt, the preparation method of which comprises the following steps:

[0040] Step 1: Preparation of the core layer: aramid fiber and flame retardant fiber are blended in a ratio of 2:1, and then the aramid core layer is made through a weaving process.

[0041] Step 2, preparation of covering layer: by weight, 85 parts of styrene-butadiene rubber and 15 parts of high styrene rubber are added to an internal mixer, followed by 4 parts of nano zinc oxide and 3 parts of stearic acid, 4 parts of anti-cutting resin (dicyclopentadiene phenolic resin KPE-F6115), 7 parts of silane coupling agent Si69, 7 parts of aromatic oil, 2 parts of antioxidant 6PPD and 1 part of antioxidant RD, 27 parts of flame retardant chlorinated paraffin and 15 parts of antimony trioxide, 50 parts of white carbon black and 20 parts of carbon black N330, and mixing at 135°C for one stage for 280s; after standing for 8h, 2 parts of sulfur and 1.5 parts of accelerator NS are added, and mixing is carried out at 105°C for two stages for 160s to obtain covering rubber.

[0042] Step 3, preparation of the rubber layer: by weight, 60 parts of styrene-butadiene rubber and 40 parts of natural rubber are added to an internal mixer, followed by 3 parts of nano zinc oxide and 2.5 parts of stearic acid, 3 parts of antioxidant RD and 2.5 parts of antioxidant BLE, 8 parts of coumarone resin, 4 parts of adhesive RA and 3 parts of adhesive RS, 10 parts of white carbon black, 25 parts of carbon black N220 and 13 parts of carbon black N550, and a first-stage mixing is carried out at a mixing temperature of 148°C and a mixing time of 250s to obtain a first-stage mixed rubber; after standing for 8 hours, 2.5 parts of sulfur and 1.5 parts of accelerator CZ are added, and a second-stage mixing is carried out at a mixing temperature of 100°C and a mixing time of 170s to obtain a rubber layer.

[0043] Step 4, compounding and vulcanization: the adhesive tape prepared in step 3 is laminated with the aramid belt core through a four-roll calender (roller temperature is 105°C, calendering speed is 7m / s) to obtain an adhesive tape; the covering rubber prepared in step 2 is processed through a cold feed pin extruder to obtain a covering rubber film, and then the adhesive tape and the covering rubber film are compounded to obtain a flame-retardant and cut-resistant aramid conveyor belt blank, and then vulcanized to obtain a flame-retardant and cut-resistant aramid conveyor belt finished product.

[0044] Example 3

[0045] A flame retardant and cut resistant aramid conveyor belt, the preparation method of which comprises the following steps:

[0046] Step 1: Preparation of the core layer: aramid fiber and flame retardant fiber are blended in a ratio of 3:2, and then the aramid core layer is made through a weaving process.

[0047] Step 2, preparation of covering layer: by weight, 90 parts of styrene-butadiene rubber and 10 parts of high styrene rubber are added to an internal mixer, followed by 5 parts of nano zinc oxide and 3 parts of stearic acid, 5 parts of anti-cutting resin (dicyclopentadiene phenolic resin KPE-F6135), 8 parts of silane coupling agent Si69, 8 parts of coumarone resin, 2 parts of antioxidant BLE and 4 parts of antioxidant RD, 5 parts of flame retardant ammonium polyphosphate, 5 parts of antimony trioxide and 25 parts of chlorinated paraffin, 55 parts of white carbon black and 25 parts of carbon black N550, and mixing at 140°C for one stage for 300s; after standing for 8h, 2.5 parts of sulfur and 1.5 parts of accelerator M are added, and mixing is carried out at 110°C for two stages for 180s to obtain a covering rubber.

[0048] Step 3, preparation of the rubber layer: by weight, 70 parts of styrene-butadiene rubber and 30 parts of natural rubber are added to an internal mixer, followed by 4 parts of nano zinc oxide and 2 parts of stearic acid, 3 parts of antioxidant BLE and 3 parts of antioxidant RD, 10 parts of aromatic oil, 5 parts of adhesive RA and 3 parts of adhesive RS, 8 parts of white carbon black, 22 parts of carbon black N220 and 20 parts of carbon black N330, and a first-stage mixing is carried out at a mixing temperature of 150°C and a mixing time of 270s to obtain a first-stage mixed rubber; after standing for 8 hours, 3 parts of sulfur and 1.5 parts of accelerator NS are added, and a second-stage mixing is carried out at a mixing temperature of 105°C and a mixing time of 180s to obtain a rubber layer.

[0049] Step 4, compounding and vulcanization: the adhesive tape prepared in step 3 is laminated with the aramid belt core through a four-roll calender (roller temperature is 110°C, calendering speed is 8m / s) to obtain an adhesive tape, the covering rubber prepared in step 2 is processed through a cold feed pin extruder to obtain a covering rubber film, and then the adhesive tape and the covering rubber film are compounded to obtain a flame-retardant and cut-resistant aramid conveyor belt blank, which is then vulcanized to obtain a flame-retardant and cut-resistant aramid conveyor belt finished product.

[0050] The physical and mechanical properties of the finished belts prepared in Examples 1 to 3 and the commercially available conventional conveyor belt products in Comparative Examples 1 to 3 were tested, and the test results are shown in Tables 1 to 3 below.

[0051] Among them, comparative example 1 is a conventional fabric core flame retardant conveyor belt; comparative example 2 is a conventional aramid conveyor belt; comparative example 3 is a conventional flame retardant aramid conveyor belt.

[0052] Test conditions: striking frequency: 120 times / min, rotation frequency: 720r / min, time: 20min.

[0053] Test equipment: RCC-I rubber dynamic cutting tester (Beijing Wanhui Yifang Technology Development Co., Ltd.).

[0054] Table 1 Comparison of cutting resistance of covering glue

[0055] Covering rubber anti-cutting performance Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Example 3 <![CDATA[Cutting loss / mm 3 > 2109 1875 2085 964 764 621

[0056] Table 2 Comparison of flame retardant properties

[0057]

[0058] Note: "Inextinguishable" means that after the flame of the alcohol burner is removed, the flame of the sample remains burning for more than 1 minute.

[0059] Table 3 Adhesion performance comparison

[0060]

[0061] in conclusion:

[0062] It can be seen from the test results in Tables 1 to 3 above that the flame-retardant and cut-resistant aramid conveyor belt of the present invention shows significant advantages in performance. Compared with the conventional conveyor belts of Comparative Examples 1 to 3, the cutting resistance of the covering rubber is greatly improved, and the cutting loss of Examples 1 to 3 is significantly lower than that of the comparative example, indicating that the conveyor belt of the present invention can effectively resist cutting damage and greatly extend the service life of the conveyor belt. In terms of flame retardancy, the flame duration of the alcohol blowtorch test of Examples 1 to 3 is much shorter than that of Comparative Example 1, and there is no situation where the flame does not go out for a long time like in Comparative Example 2, which is basically equivalent to Comparative Example 3, fully demonstrating the excellent flame retardant effect, which can effectively reduce the risk of fire and ensure production safety. In terms of bonding performance, the bonding strength between the covering rubber and the cloth layer of Examples 1 to 3 is close to or even better than that of conventional aramid conveyor belts, ensuring the stability of the conveyor belt structure.

[0063] The flame-retardant and cut-resistant aramid conveyor belt and the preparation method thereof of the present invention effectively solve the problem of insufficient cut-resistant performance of existing flame-retardant conveyor belts, have the advantages of high strength, high flame retardancy and good adhesion, and have broad application prospects. They will play an important role in industrial production, especially in fields with stringent requirements on conveyor belt performance, such as coal mining, and will effectively promote the safe and efficient development of related industries.

[0064] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A flame retardant and cut resistant aramid conveyor belt, characterized in that: The conveyor belt comprises an aramid core layer, a rubber layer arranged on the aramid core layer, and a covering rubber layer arranged on the rubber layer, wherein the aramid core layer is interwoven with aramid fibers and flame-retardant fibers; The adhesive layer comprises: by weight, 40-70 parts of styrene-butadiene rubber, 30-60 parts of natural rubber, 35-50 parts of reinforcing filler, 4-6 parts of activator, 3-6 parts of antioxidant, 5-10 parts of plasticizer, 5-8 parts of adhesive, and 2.5-4.5 parts of vulcanizer; The covering rubber layer includes, by weight, 80-90 parts of styrene-butadiene rubber, 10-20 parts of high styrene rubber, 1-5 parts of cut-resistant resin, 50-80 parts of reinforcing filler, 6-8 parts of activator, 4-8 parts of silane coupling agent, 4-8 parts of plasticizer, 3-6 parts of antioxidant, 25-35 parts of flame retardant, and 2-4 parts of vulcanizer.

2. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The reinforcing filler is selected from one or more of white carbon black, carbon black N220, carbon black N330, and carbon black N550.

3. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The active agent is nano zinc oxide and stearic acid; the adhesive is a mixture of adhesive RA and adhesive RS.

4. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The antioxidant is selected from one or more of antioxidant RD, antioxidant 6PPD, antioxidant microcrystalline wax, and antioxidant BLE.

5. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The plasticizer is selected from one or both of coumarone resin and aromatic oil.

6. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The flame retardant is selected from one or more of aluminum hydroxide, chlorinated paraffin, antimony trioxide, and ammonium polyphosphate.

7. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The anti-cutting resin is selected from one or more of dicyclopentadiene phenolic resin KPE-F6095, dicyclopentadiene phenolic resin KPE-F6115 or dicyclopentadiene phenolic resin KPE-F6135; the silane coupling agent is Si69.

8. The flame retardant and cut resistant aramid conveyor belt according to claim 1, characterized in that: The vulcanizing agent is selected from one or more of sulfur, accelerator CZ, accelerator NS or accelerator M.

9. A method for preparing a flame retardant and cut resistant aramid conveyor belt, characterized in that: The following steps are involved: Step 1: Preparation of the belt core layer: aramid fiber and flame retardant fiber are blended in a certain proportion, and then the aramid belt core layer is made by a weaving process; Step 2, preparation of covering rubber layer: by weight, add 80-90 parts of styrene-butadiene rubber and 10-20 parts of high styrene rubber into an internal mixer, then add 6-8 parts of active agent, 1-5 parts of anti-cutting resin, 4-8 parts of silane coupling agent, 4-8 parts of plasticizer, 3-6 parts of antioxidant, 25-35 parts of flame retardant, 50-80 parts of reinforcing filler, and perform one-stage mixing to obtain a first-stage mixed rubber; after standing for 8 hours, add 2-4 parts of vulcanizing agent, perform two-stage mixing to obtain covering rubber; Step 3, preparation of the rubber layer: by weight, add 40-70 parts of styrene-butadiene rubber and 30-60 parts of natural rubber into an internal mixer, then add 4-6 parts of activator, 3-6 parts of antioxidant, 5-10 parts of plasticizer, 5-8 parts of adhesive, and 35-50 parts of reinforcing filler; after standing for 8 hours, add 2.5-4.5 parts of vulcanizer, perform two-stage mixing, and obtain the rubber layer; Step 4, compounding and vulcanization: the adhesive tape obtained in step 3 is laminated to the aramid belt core through a four-roll calender to obtain an adhesive tape; the covering rubber obtained in step 2 is processed through a cold feed pin extruder to obtain a covering rubber film, and then the adhesive tape and the covering rubber film are compounded to obtain a flame-retardant and cut-resistant aramid conveyor belt embryo, which is then vulcanized to obtain a flame-retardant and cut-resistant aramid conveyor belt finished product.

10. The method for preparing the flame retardant and cut resistant aramid conveyor belt according to claim 9, characterized in that: The mixing temperature of the first mixing stage in the second step is 125-140° C., and the mixing time is 240-300 seconds; the mixing temperature of the second mixing stage is 90-110° C., and the mixing time is 120-180 seconds; In the step 3, the mixing temperature of the first mixing stage is 140-150° C., and the mixing time is 200-270 s; the mixing temperature of the second mixing stage is 90-105° C., and the mixing time is 120-180 s; In the step 4, the roller temperature of the four-roll calender is 90-110° C., and the calendering speed is 5-8 m / s.

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