阅读说明：本技术 一种输送带及其制备方法和应用 (Conveying belt and preparation method and application thereof ) 是由 孙九光 鞠岑 沈庆龙 叶家坤 王亚静 陈新杰 于 2021-01-14 设计创作，主要内容包括：本发明涉及一种输送带及其制备方法和应用,所述输送带按照重量份数包括如下组分：丁苯橡胶100份,增塑剂5-50份,阻燃剂1-36份,抗静电剂1-5份,稳定剂1-8份,润滑剂1-3份,补强剂32-50份；所述补强剂包括炭黑和研磨后的滑石粉的组合；所述炭黑的重量份数为30-40份；所述滑石粉的重量份数为2-10份。本发明所述输送带在补强剂上的成本投入较低,且具有较好的硬度和强度。(The invention relates to a conveying belt and a preparation method and application thereof, wherein the conveying belt comprises the following components in parts by weight: 100 parts of styrene butadiene rubber, 5-50 parts of plasticizer, 1-36 parts of flame retardant, 1-5 parts of antistatic agent, 1-8 parts of stabilizer, 1-3 parts of lubricant and 32-50 parts of reinforcing agent; the reinforcing agent comprises the combination of carbon black and ground talcum powder; the weight portion of the carbon black is 30-40; the talcum powder is 2-10 parts by weight. The conveyer belt has low cost investment on the reinforcing agent and has better hardness and strength.)

1. The conveying belt is characterized by comprising the following components in parts by weight: 100 parts of styrene butadiene rubber, 5-50 parts of plasticizer, 1-36 parts of flame retardant, 1-5 parts of antistatic agent, 1-8 parts of stabilizer, 1-3 parts of lubricant and 32-50 parts of reinforcing agent;

the reinforcing agent comprises the combination of carbon black and ground talcum powder;

the weight portion of the carbon black is 30-40;

the ground talcum powder is 2-10 parts by weight.

2. The conveyor belt of claim 1, wherein the plasticizer comprises phthalate esters and/or chlorinated paraffin-52;

preferably, the weight part of the phthalate ester in the conveying belt is 25-35 parts;

preferably, the parts by weight of the chlorinated paraffin-52 in the conveyer belt is 5-15 parts.

3. The conveyor belt of claim 1 or 2, wherein the flame retardant comprises any one of tris (2-chloroethyl) phosphate, antimony trioxide, zinc borate, or flame retardant FRN-255, or a combination of at least two thereof;

preferably, the weight part of the tris (2-chloroethyl) phosphate in the conveyer belt is 15-25 parts;

preferably, the weight part of the antimony trioxide in the conveying belt is 1-3 parts;

preferably, the weight part of the zinc borate in the conveying belt is 2-5 parts;

preferably, the weight part of the flame retardant FRN-255 in the conveying belt is 1-3 parts.

4. The conveyor belt of any of claims 1-3, wherein the antistatic agent comprises a nonionic antistatic agent.

5. The conveyor belt of any of claims 1-4, wherein the stabilizer comprises lead sulfate tribasic and/or lead phosphite dibasic;

preferably, the weight part of the lead sulfate tribasic in the conveyer belt is 2-5 parts;

preferably, the weight part of the dibasic lead phosphite in the conveyer belt is 1-3 parts.

6. The conveyor belt of any of claims 1-5, wherein the lubricant comprises barium stearate.

7. A method of manufacturing a conveyor belt according to any of claims 1-6, comprising the steps of: mixing styrene butadiene rubber, a plasticizer, a flame retardant, an antistatic agent, a stabilizer, a lubricant and a reinforcing agent according to parts by weight, plasticating and vulcanizing to obtain the conveying belt;

the reinforcing agent includes a combination of carbon black and ground talc.

8. The method of claim 7, wherein the plastication time is 15 to 25 minutes;

preferably, the plastication is carried out in a two-roll mill;

preferably, the temperature of the front roller in the double-roller open mill is 150-155 ℃;

preferably, the back roll temperature in the two-roll mill is 145-150 ℃.

9. The method according to claim 7 or 8, characterized in that it comprises the steps of: mixing styrene-butadiene rubber, a plasticizer, a flame retardant, an antistatic agent, a stabilizer, a lubricant and a reinforcing agent according to parts by weight, plasticating for 15-25 minutes in a double-roller open mill with the front roller temperature of 150-.

10. Use of a conveyor belt according to any of claims 1-6 in the transport of coal, mineral or slag.

Technical Field

The invention relates to the technical field of chemical materials, in particular to a conveying belt and a preparation method and application thereof.

Background

The carbon black and the white carbon black are commonly used reinforcing materials for the rubber material of the conveyor belt, but due to higher cost, the production cost is reduced, the superfine composite mineral inorganic filler is used for replacing the carbon black or the white carbon black for the rubber material of the rubber product completely or partially, the production cost of the rubber material is reduced, the performance of the superfine composite mineral inorganic filler can be changed by adjusting the components and the proportion, and the application range and the effect of the superfine composite mineral inorganic filler are greatly improved.

CN108314850A discloses a rubber composition and its processing method, and a rubber product and its production method using the same, wherein the disclosed rubber composition comprises: a rubber matrix and essential components, the rubber matrix comprising: content of branched polyethylene a: a is more than 0 and less than or equal to 100 parts, and the content b of the ethylene propylene rubber and the ethylene propylene diene monomer is as follows: b is more than or equal to 0 and less than 100 parts, and the necessary components comprise: the rubber composition comprises 1.5-10 parts of a cross-linking agent and 40-200 parts of a reinforcing filler, wherein the reinforcing filler comprises carbon black and white carbon black, and also can comprise one or more of calcium carbonate, talcum powder, calcined argil, magnesium silicate and magnesium carbonate, 5-100 parts of the carbon black and 5-60 parts of the white carbon black, the rubber composition is applied to producing rubber products, and the disclosed rubber products comprise an insulating material for manufacturing high-strength wires and cables, a waterproof coiled material and a high-temperature-resistant conveying belt. The rubber product has the beneficial effects of improving the yield and the tearing strength of the rubber product and improving the service performance of the rubber product. The disclosed rubber product does not further research the type of the reinforcing agent, and the formula production cost is high.

CN106751045A discloses a wear-resistant conveyor belt rubber material and a preparation method thereof, wherein the wear-resistant conveyor belt rubber material is prepared from the following raw materials in parts by weight: 30-60 parts of butyl rubber, 20-35 parts of ABS resin, 4-10 parts of dipentamethylenethiuram tetrasulfide, 1-5 parts of zinc di-n-butyldithiocarbamate, 3-9 parts of silicon dioxide, 2-7 parts of wood fiber, 5-15 parts of sodium benzoate, 5-10 parts of phenyl silicone oil, 2-8 parts of carbon black, 6-12 parts of cyclohexyl thiophthalimide, 2-8 parts of dibenzothiazyl disulfide, 3-10 parts of talcum powder, 3-9 parts of sulfur, 3-10 parts of calcium silicate and 3-6 parts of a film-forming additive. The disclosed rubber material for the conveyor belt has the advantages of good abrasion resistance, high strength, high impact resistance and the like, but the disclosed rubber material for the conveyor belt has more types of reinforcing agents, higher carbon black proportion and higher sizing material cost.

Therefore, it is important to develop a conveyor belt with lower cost and better hardness and strength.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a conveying belt, a preparation method and application thereof, wherein the conveying belt has low cost investment on reinforcing agent and has better hardness and strength.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides a conveyor belt, which comprises the following components in parts by weight: 100 parts of styrene butadiene rubber, 5-50 parts of plasticizer, 1-36 parts of flame retardant, 1-5 parts of antistatic agent, 1-8 parts of stabilizer, 1-3 parts of lubricant and 32-50 parts of reinforcing agent;

the reinforcing agent comprises a combination of carbon black and talcum powder;

the weight portion of the carbon black is 30-40;

the ground talcum powder is 2-10 parts by weight.

The reinforcing agent in the conveying belt is the combination of carbon black and ground talcum powder, the carbon black part with higher cost is replaced by the talcum powder with lower cost, and the production cost is reduced; the carbon black and the ground talcum powder in a specific proportion not only can reduce the production cost, but also can keep the hardness and the strength of the obtained conveying belt at a higher level; compared with the unground talc raw material, the particle size of the ground talc is reduced from 74 mu m to 10 mu m, and the hardness and the strength of the obtained conveying belt are higher under the same addition amount of the ground talc.

The weight portion of the plasticizer is 5-50 parts, such as 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts and the like.

The flame retardant is 1-36 parts by weight, such as 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts and the like.

The antistatic agent is 1-5 parts by weight, such as 2 parts, 3 parts, 4 parts and the like.

The weight portion of the stabilizer is 1-8 parts, such as 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts and the like.

The lubricant is 1-3 parts by weight, such as 1.5 parts, 2 parts, 2.5 parts, and the like.

The reinforcing agent is 32-50 parts by weight, such as 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts and the like.

The carbon black is 30 to 40 parts by weight, such as 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts and the like.

The talcum powder is 2-10 parts by weight, such as 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and the like.

Preferably, the plasticizer comprises phthalate and/or chlorinated paraffin-52.

Preferably, the parts by weight of the phthalate ester in the conveyor belt are from 25 to 35 parts, such as 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, and the like.

Preferably, the parts by weight of the chlorinated paraffin-52 in the conveyor belt is 5-15 parts, such as 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, and the like.

Preferably, the flame retardant comprises any one of tris (2-chloroethyl) phosphate (TCEP), antimony trioxide, zinc borate or flame retardant FRN-255 or a combination of at least two of which typical but non-limiting combinations include: combinations of TCEP and antimony trioxide, combinations of antimony trioxide, zinc borate and flame retardants FRN-255, combinations of TCEP, antimony trioxide, zinc borate and flame retardants FRN-255, and the like.

Preferably, the tris (2-chloroethyl) phosphate is present in the conveyor belt in an amount of 15 to 25 parts by weight, such as 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, etc.

Preferably, the antimony trioxide is present in the conveyor belt in 1-3 parts by weight, such as 1.5 parts, 2 parts, 2.5 parts, etc.

Preferably, the zinc borate is present in the conveyor belt in an amount of 2 to 5 parts by weight, such as 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, etc.

Preferably, the weight parts of the flame retardant FRN-255 in the conveyor belt are 1-3 parts, such as 1.5 parts, 2 parts, 2.5 parts, etc.

Preferably, the antistatic agent comprises a nonionic antistatic agent. Such as TF 480, etc.

Preferably, the stabilizer comprises lead sulfate tribasic and/or lead phosphite dibasic.

Preferably, the parts by weight of the lead sulfate tribasic in the conveyor belt are 2-5 parts, such as 2.5 parts, 3 parts, 3.5 parts, 4 parts, etc.

Preferably, the dibasic lead phosphite is present in the conveyor belt in an amount of 1-3 parts by weight, such as 1.5 parts, 2 parts, 2.5 parts, etc.

Preferably, the lubricant comprises barium stearate.

In a second aspect, the present invention provides a method for manufacturing the conveyor belt of the first aspect, the method comprising the steps of: mixing styrene butadiene rubber, a plasticizer, a flame retardant, an antistatic agent, a stabilizer, a lubricant and a reinforcing agent according to parts by weight, plasticating and vulcanizing to obtain the conveying belt;

the reinforcing agent includes a combination of carbon black and ground talc.

Preferably, the time of the mastication is 15-25 minutes, such as 16 minutes, 17 minutes, 18 minutes, 19 minutes, 20 minutes, 21 minutes, 22 minutes, 23 minutes, 24 minutes, and the like.

Preferably, the plastication is carried out in a two-roll mill.

Preferably, the front roll temperature in the two-roll mill is 150 ℃ and 155 ℃, such as 151 ℃, 152 ℃, 153 ℃, 154 ℃ and the like.

Preferably, the back roll temperature in the two-roll mill is 145-150 ℃, such as 146 ℃, 147 ℃, 148 ℃, 149 ℃ and the like.

As a preferred technical scheme, the preparation method comprises the following steps: mixing styrene-butadiene rubber, a plasticizer, a flame retardant, an antistatic agent, a stabilizer, a lubricant and a reinforcing agent according to parts by weight, plasticating for 15-25 minutes in a double-roller open mill with the front roller temperature of 150-.

In a third aspect, the present invention provides use of a conveyor belt according to the first aspect in the transportation of coal slag, mineral aggregate or slag.

Compared with the prior art, the invention has the following beneficial effects:

the conveyer belt has low cost investment on the reinforcing agent and has better hardness and strength. The average hardness of the conveyer belt is 62-68SHA degrees, the average tensile strength is more than 20.2MPa, and the average elongation at break is more than 402%.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

Examples 1 to 7 and comparative examples 1 to 2

The conveying belt comprises the following components in parts by weight as shown in tables 1 and 2:

TABLE 1

TABLE 2

In tables 1 and 2, the styrene-butadiene rubber was purchased from Shanghai Rich New Material science and technology Co., Ltd and is named as styrene-butadiene rubber 1502; the chlorinated paraffin-52 is purchased from Nanjing national Wei chemical Co., Ltd, and has the brand number of A-1; the antistatic agent is purchased from a positive chemical auxiliary agent company Limited in Tianjin and has the brand number of TF 480; the flame retardant FRN-255 is purchased from New Material science and technology Limited company of Anhui Ding and has the brand number of FRN-255; the carbon black is purchased from flourishing chemical company Limited in Neze, and the brand is carbon black N330; talcum powder is available from Jiangsu Yongxin powder science and technology Co., Ltd under the designation WF-501.

The conveyor belt provided in example 1, wherein the method of making comprises the steps of:

grinding a talcum powder raw material (unground talcum powder with the particle size of 74 mu m) by a CMD2000 superfine grinder to obtain ground talcum powder with the particle size of 10 mu m, mixing styrene-butadiene rubber, a plasticizer, a flame retardant, an antistatic agent, a stabilizer, a lubricant, carbon black and the ground talcum powder according to parts by weight, plasticating for 20 minutes in a double-roller open mill with a front roller temperature of 152 ℃ and a rear roller temperature of 148 ℃, and vulcanizing to obtain the conveying belt.

The conveyor belt provided in embodiment 2, the method of making comprising the steps of:

the manufacturing method of this example is different from that of example 1 in that the front roll temperature is 150 c, the rear roll temperature is 145 c, and the mastication time is 25 minutes, and the rest is the same as example 1.

The conveyor belt provided in example 3, wherein the method of making comprises the steps of:

the manufacturing method of this example is different from that of example 1 in that the front roll temperature is 155 deg.C, the rear roll temperature is 150 deg.C, and the mastication time is 15 minutes, and the rest is the same as example 1.

The manufacturing methods of the conveyer belts described in examples 4 to 7 and comparative examples 1 to 2 are different from example 1 only in the amount of each component added and the kind of the component, and are specifically shown in tables 1 to 2.

Performance testing

And (3) closing the conveyer belts in the examples 1-7 and the comparative examples 1-2 under the pressure of 5MPa, raising the temperature to 165 ℃, pressurizing to 15MPa, keeping the pressure and the temperature unchanged, tabletting after 5min, taking out the tablets, cooling to room temperature, and testing the mechanical properties after placing for 24 hours.

The test results are summarized in table 3.

TABLE 3

The data in the table 3 show that the average hardness of the conveyer belt is 62-68SHA degrees, the average tensile strength is more than 20.2MPa, and the average elongation at break is more than 402 percent, and the conveyer belt of the invention uses cheap talcum powder for grinding and then partially replaces carbon black as a reinforcing agent, so that the average hardness, the average strength and the average elongation of the conveyer belt can be kept at higher levels on the premise of reducing the cost.

Analysis of comparative example 1 and example 1 shows that, compared with comparative example 1, the average hardness, the average strength and the average elongation of the conveyer belt in example 1 are reduced, but the reduction range is low, the industrial production requirement can be met, and the cost reduction is greatly reduced.

As can be seen from the analysis of comparative example 2 and example 5, the mechanical properties of comparative example 2 are inferior to those of example 5, and even the rubber which can not meet the requirements of industrial production (rubber sheet requirements: hardness is 60-75SHA DEG, average tensile strength is more than or equal to 20MPa, and elongation at break is more than or equal to 400%), thereby demonstrating that when carbon black is used in combination with ground talc, the average hardness, average strength and average elongation of the obtained conveyor belt are better than those of carbon black and unground talc, and the cost reduction can be achieved on the basis of meeting the basic industrial requirements.

The present invention is illustrated in detail by the examples described above, but the present invention is not limited to the details described above, i.e., it is not intended that the present invention be implemented by relying on the details described above. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.