阅读说明：本技术 非氯丁胶配方阻燃输送带的配方及加工工艺 (formula and processing technology of non-neoprene formula flame-retardant conveying belt ) 是由 马群 赵绍文 宋大发 李洪涛 于 2019-05-29 设计创作，主要内容包括：本发明涉及一种非氯丁胶配方阻燃输送带的配方；本发明还涉及一种非氯丁胶配方阻燃输送带的加工工艺。本发明的有益效果在于：胶料阻燃性能达到与氯丁胶配方相媲美的质量水平,强度、磨耗等物理机械性能有较大提高,胶料易于加工操作,并且焦烧时间更长,不易焦烧,更耐贮存,成本大大降低,按较佳配比制得的覆盖胶每千克节约成本10元左右。按较佳配比制得的芯胶配方强度、粘合、阻燃等性能都完全满足标准要求,芯胶每千克节约成本8元左右。采用较佳配比的配方进行批量生产,以ST/S1250型号的钢丝绳芯阻燃输送带为例,每平方米可节约材料成本200元左右,每100米可节约材料成本2万元,若生产10000米就可节约材料成本200万元,经济效益非常可观。(the invention relates to a formula of a non-neoprene formula flame-retardant conveying belt; the invention also relates to a processing technology of the non-neoprene formula flame-retardant conveying belt. The invention has the beneficial effects that: the flame retardant property of the rubber material reaches the quality level which is comparable to that of a neoprene formula, the physical and mechanical properties such as strength, abrasion and the like are greatly improved, the rubber material is easy to process and operate, the scorching time is longer, the rubber material is difficult to scorch and more resistant to storage, the cost is greatly reduced, and the cost of each kilogram of the prepared covering rubber according to a better proportion is saved by about 10 yuan. The core glue prepared according to a better proportion has the properties of strength, adhesion, flame retardance and the like which completely meet the standard requirements, and the cost of each kilogram of core glue is saved by about 8 yuan. The formula with a better proportion is adopted for batch production, taking a steel wire rope core flame-retardant conveyor belt with the model ST/S1250 as an example, the material cost can be saved by about 200 yuan per square meter, the material cost can be saved by 2 ten thousand yuan per 100 meters, the material cost can be saved by 200 ten thousand yuan if 10000 meters are produced, and the economic benefit is very considerable.)

1. the formula of the non-chloroprene rubber formula flame-retardant conveyor belt comprises a non-chloroprene rubber cover rubber and a non-chloroprene rubber core rubber; the method is characterized in that: the non-chloroprene rubber cover rubber is prepared from the following main materials: 20 parts of natural rubber NR, 50 parts of styrene butadiene rubber SBR, 30 parts of butadiene rubber BR, 5 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 40-45 parts of medium and super wear-resistant carbon black, 1.2-1.5 parts of an accelerator, 2.6-2.8 parts of sulfur, 2.5-3.0 parts of an anti-aging agent, 1.0-1.5 parts of microcrystalline wax, 12-15 parts of an intumescent flame retardant lubricant NPFR, 2028-12 parts of a flame retardant lubricant MB2028, 2018-20 parts of a silicon flame retardant DM, 7-20 parts of a reinforcing flame retardant S8017, 6-8 parts of antimony trioxide and 25-28 parts of chlorinated paraffin;

the non-chloroprene rubber core adhesive is prepared from the following main materials: 30 parts of natural rubber NR, 70 parts of styrene butadiene rubber SBR, 5-7 parts of zinc oxide, 0.5-1.0 part of magnesium oxide, 0.5-1.0 part of stearic acid, 40-45 parts of carbon black N2208, 1.8-2.1 parts of accelerator, 2.6-2.8 parts of sulfur, 2.0-2.5 parts of anti-aging agent, 9-12 parts of ammonium polyphosphate, 8-20 parts of silicon flame retardant DM2018, 7-20 parts of reinforcing flame retardant S8017, 6-8 parts of antimonous oxide, 25-28 parts of chlorinated paraffin, 2.2 parts of cobalt boroacylate, 2.0-2.5 parts of alkyl phenolic tackifying resin SL, 2.5-3.0 parts of adhesive HMMM and 10-12 parts of white carbon black.

2. the formulation of a non-neoprene formulated flame retardant conveyor belt of claim 1, wherein: the raw materials are selected, and the preferable mixture ratio is as follows: the non-chloroprene rubber cover rubber is prepared from the following main materials: 20 parts of natural rubber NR, 50 parts of styrene butadiene rubber SBR, 30 parts of butadiene rubber BR, 5 parts of zinc oxide, 0.5 part of stearic acid, 45 parts of medium and super wear-resistant carbon black, 1.8 parts of accelerator, 2.8 parts of sulfur, 1.5 parts of anti-aging agent 4010NA, 1.0 part of anti-aging agent RD, 1.5 parts of microcrystalline wax, 14 parts of intumescent flame-retardant lubricant NPFR, 2028 parts of flame-retardant lubricant MB2028, 2020 parts of silicon flame retardant DM, 8020 parts of reinforcing flame retardant S, 8 parts of antimony trioxide and 22 parts of chlorinated paraffin, wherein the total weight is as follows: 251.1 parts by weight;

The non-chloroprene rubber core adhesive is prepared from the following main materials: 30 parts of natural rubber NR, 70 parts of styrene butadiene rubber SBR, 7 parts of zinc oxide, 1.0 part of magnesium oxide, 0.5 part of stearic acid, 22040 parts of carbon black N, 2.1 parts of accelerator, 2.8 parts of sulfur, 1.5 parts of antioxidant 4010NA, 0.5 part of antioxidant RD, 11 parts of ammonium polyphosphate, 2020 parts of silicon flame retardant, 8020 parts of reinforcing flame retardant S, 8 parts of antimony trioxide, 25 parts of chlorinated paraffin, 2.2 parts of cobalt boroacylate, 2.2 parts of alkyl phenolic tackifying resin SL, 3.0 parts of adhesive HMMM, 10 parts of white carbon black, and the total weight is as follows: 256.8 parts by weight.

3. A processing technology of a non-neoprene formula flame-retardant conveying belt is characterized in that: the method comprises the following steps: step 1: the manufacturing process of the non-chloroprene rubber cover rubber comprises the following steps: adding natural rubber NR, styrene butadiene rubber SBR and butadiene rubber BR into an internal mixer, adding zinc oxide, stearic acid, medium and super wear-resistant carbon black, an anti-aging agent, microcrystalline paraffin, antimony trioxide, chlorinated paraffin, an intumescent flame retardant lubricant NPFR, a flame retardant lubricant MB202, a silicon flame retardant DM20 and a reinforcing flame retardant S80 into the internal mixer together for first-stage mixing, discharging the mixture from an open mill, placing the mixture for 8 hours, then adding an accelerator and sulfur into the internal mixer for second-stage mixing, thereby obtaining mixed rubber; after the rubber compound is qualified, extruding the rubber compound by using a cold feed extruder, and feeding the rubber compound into a rubber calender through a conveyor belt to calender the rubber sheet so as to obtain a non-chloroprene rubber cover rubber sheet;

Step 2: the manufacturing process of the non-chloroprene rubber core adhesive comprises the following steps: putting natural rubber NR, styrene butadiene rubber SBR, zinc oxide, magnesium oxide, stearic acid, carbon black N220, an anti-aging agent 4010NA, an anti-aging agent RD, ammonium polyphosphate, a silicon flame retardant DM20, a reinforcing flame retardant S80, antimony trioxide, chlorinated paraffin, cobalt boroacylate, an alkyl phenolic tackifying resin SL and white carbon black into an internal mixer for first-stage mixing, putting the internal mixer after standing for 8 hours, adding an accelerator, sulfur and a binder HMMM for second-stage mixing to obtain a mixed rubber; after the rubber compound is qualified, extruding the rubber compound by using a cold feed extruder, and feeding the rubber compound into a rubber calender through a conveyor belt to calender the rubber sheet so as to obtain a non-chloroprene rubber core rubber sheet;

And step 3: a strip blank process: compounding the non-chloroprene rubber cover rubber obtained in the step 1 and the non-chloroprene rubber core rubber obtained in the step 2 on a forming machine to form a composite rubber sheet of a cover rubber sheet and a core rubber sheet; or directly passing through a rubber calender to compound the cover rubber sheet and the core rubber sheet; sending the obtained composite rubber sheet to a cold pressing process of a steel wire rope core conveying belt production line, carrying out cold pressing on an upper composite rubber sheet, a steel wire rope and a lower composite rubber sheet together, and cutting off redundant rubber sheets on two sides of the width to form a belt blank;

and 4, step 4: and (3) a vulcanization process: and (3) drawing the belt blank obtained by cold pressing into a flat plate of a vulcanizing machine for vulcanizing, wherein the temperature is controlled at 147-155 ℃, the time is 30-50 minutes, and the unit pressure is 2.5-3.5 MPa.

Technical Field

The invention relates to a conveying belt, in particular to a formula and a processing technology of a non-chloroprene rubber formula flame-retardant conveying belt.

background

At present, the flame-retardant steel wire rope core conveying belt for coal mines has good mechanical characteristics, the strength of the conveying belt can reach about 7500KN/m, obviously, the strength of the conveying belt can not be met by the fabric core conveying belt, so the flame-retardant steel wire rope core conveying belt occupies an extremely important position in long-distance and large-capacity coal conveying and other bulk material conveying systems with fire risks, and the flame-retardant steel wire rope core conveying belt occupies about 1/2 and is in a rising trend in the production of the whole steel wire rope core conveying belt.

China is a world coal producing big country, the flame-retardant steel wire rope core conveying belt for the coal mine has wide market prospect, is well valued by China, and has established a professional standard with legislative property for the flame-retardant steel wire rope core conveying belt so as to ensure the safety of production and transportation. The flame-retardant antistatic property specified in the standard of MT668-2008 flame-retardant steel wire rope core conveyer belt for coal mine is the highest grade requirement of the flame-retardant conveyer belt products at home and abroad. At present, most of the existing conveying belt production enterprises in China are produced by adopting chloroprene rubber as a base material, the oxygen index of the chloroprene rubber is 38% -41%, the chloroprene rubber can be combusted when contacting a fire source, but can be automatically extinguished immediately after leaving the fire, and therefore, the chloroprene rubber formula rubber material has excellent flame retardant property. But also has the disadvantages of over high price cost, poor operability of the rubber material easy to stick to the roller, easy scorching and self-vulcanization of the neoprene rubber material, and short storage period; the conveyer belt of the neoprene formula also has the defects of no wear resistance, no cold resistance and the like. The conveyor belt industry also ranks the steel wire rope core flame-retardant conveyor belt with a non-neoprene formula as a development direction, but the currently processed steel wire rope core flame-retardant conveyor belt with the non-neoprene formula cannot meet the requirements. The company successfully develops the non-neoprene flame-retardant formula through tests and researches.

disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve one of the problems, the formula of the flame-retardant conveying belt with the non-chloroprene rubber formula is provided, natural rubber NR, styrene butadiene rubber SBR and butadiene rubber BR are used for replacing chloroprene rubber as base materials to prepare a flame-retardant antistatic covering rubber material, the natural rubber NR and the styrene butadiene rubber SBR are used for replacing chloroprene rubber as the base materials to prepare a flame-retardant core rubber material, and the steel wire rope core flame-retardant conveying belt for coal mines is produced.

the technical scheme adopted by the invention for solving the problems is as follows:

The formula of the non-chloroprene rubber formula flame-retardant conveyor belt comprises a non-chloroprene rubber cover rubber and a non-chloroprene rubber core rubber; the method is characterized in that: the non-chloroprene rubber cover rubber is prepared from the following main materials: 20 parts of natural rubber NR, 50 parts of styrene butadiene rubber SBR, 30 parts of butadiene rubber BR, 5 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 40-45 parts of medium and super wear-resistant carbon black, 1.2-1.5 parts of an accelerator, 2.6-2.8 parts of sulfur, 2.5-3.0 parts of an anti-aging agent, 1.0-1.5 parts of microcrystalline wax, 12-15 parts of an intumescent flame retardant lubricant NPFR, 2028-12 parts of a flame retardant lubricant MB2028, 2018-20 parts of a silicon flame retardant DM, 7-20 parts of a reinforcing flame retardant S8017, 6-8 parts of antimony trioxide and 25-28 parts of chlorinated paraffin;

the non-chloroprene rubber core adhesive is prepared from the following main materials: natural rubber NR 30, styrene butadiene rubber SBR 70, zinc oxide 5-7 parts by weight, magnesium oxide 0.5-1.0 part by weight, stearic acid 0.5-1.0 part by weight, carbon black N22040-45 parts by weight, accelerator 1.8-2.1 parts by weight, sulfur 2.6-2.8 parts by weight, anti-aging agent 2.0-2.5 parts by weight, ammonium polyphosphate 9-12 parts by weight, silicon flame retardant DM2018-20 parts by weight, reinforcing flame retardant S8017-20 parts by weight, antimony trioxide 6-8 parts by weight, chlorinated paraffin 25-28 parts by weight, cobalt boracylate 2.2 parts by weight, alkyl phenolic tackifying resin SL 2.0-2.5 parts by weight, adhesive HMMM 2.5-3.0 parts by weight and white carbon black 10-12 parts by weight.

the raw materials are selected, and the preferable mixture ratio is as follows: the non-chloroprene rubber cover rubber is prepared from the following main materials: 20 parts of natural rubber NR, 50 parts of styrene butadiene rubber SBR, 30 parts of butadiene rubber BR, 5 parts of zinc oxide, 0.5 part of stearic acid, 45 parts of medium and super wear-resistant carbon black, 1.8 parts of accelerator, 2.8 parts of sulfur, 1.5 parts of anti-aging agent 4010NA, 1.0 part of anti-aging agent RD, 1.5 parts of microcrystalline wax, 14 parts of intumescent flame-retardant lubricant NPFR, 2028 parts of flame-retardant lubricant MB2028, 2020 parts of silicon flame retardant DM, 8020 parts of reinforcing flame retardant S, 8 parts of antimony trioxide and 22 parts of chlorinated paraffin, wherein the total weight is as follows: 251.1 parts by weight;

The non-chloroprene rubber core adhesive is prepared from the following main materials: 30 parts of natural rubber NR, 70 parts of styrene butadiene rubber SBR, 7 parts of zinc oxide, 1.0 part of magnesium oxide, 0.5 part of stearic acid, 22040 parts of carbon black N, 2.1 parts of accelerator, 2.8 parts of sulfur, 1.5 parts of antioxidant 4010NA, 0.5 part of antioxidant RD, 11 parts of ammonium polyphosphate, 2020 parts of silicon flame retardant, 8020 parts of reinforcing flame retardant S, 8 parts of antimony trioxide, 25 parts of chlorinated paraffin, 2.2 parts of cobalt boroacylate, 2.2 parts of alkyl phenolic tackifying resin SL, 3.0 parts of adhesive HMMM, 10 parts of white carbon black, and the total weight is as follows: 256.8 parts by weight.

The invention also provides a processing technology of the non-neoprene formula flame-retardant conveying belt, which comprises the following steps:

step 1: the manufacturing process of the non-chloroprene rubber cover rubber comprises the following steps: adding natural rubber NR, styrene butadiene rubber SBR and butadiene rubber BR into an internal mixer, adding zinc oxide, stearic acid, medium and super wear-resistant carbon black, an anti-aging agent, microcrystalline paraffin, antimony trioxide, chlorinated paraffin, an intumescent flame retardant lubricant NPFR, a flame retardant lubricant MB202, a silicon flame retardant DM20 and a reinforcing flame retardant S80 into the internal mixer together for first-stage mixing, discharging the mixture from an open mill, placing the mixture for 8 hours, then adding an accelerator and sulfur into the internal mixer for second-stage mixing, thereby obtaining mixed rubber; after the rubber compound is qualified, extruding the rubber compound by using a cold feed extruder, and feeding the rubber compound into a rubber calender through a conveyor belt to calender the rubber sheet so as to obtain a non-chloroprene rubber cover rubber sheet;

step 2: the manufacturing process of the non-chloroprene rubber core adhesive comprises the following steps: putting natural rubber NR, styrene butadiene rubber SBR, zinc oxide, magnesium oxide, stearic acid, carbon black N220, an anti-aging agent 4010NA, an anti-aging agent RD, ammonium polyphosphate, a silicon flame retardant DM20, a reinforcing flame retardant S80, antimony trioxide, chlorinated paraffin, cobalt boroacylate, an alkyl phenolic tackifying resin SL and white carbon black into an internal mixer for first-stage mixing, putting the internal mixer after standing for 8 hours, adding an accelerator, sulfur and a binder HMMM for second-stage mixing to obtain a mixed rubber; after the rubber compound is qualified, extruding the rubber compound by using a cold feed extruder, and feeding the rubber compound into a rubber calender through a conveyor belt to calender the rubber sheet so as to obtain a non-chloroprene rubber core rubber sheet;

And step 3: a strip blank process: compounding the non-chloroprene rubber cover rubber obtained in the step 1 and the non-chloroprene rubber core rubber obtained in the step 2 on a forming machine to form a composite rubber sheet of a cover rubber sheet and a core rubber sheet; or directly passing through a rubber calender to compound the cover rubber sheet and the core rubber sheet; sending the obtained composite rubber sheet to a cold pressing process of a steel wire rope core conveying belt production line, carrying out cold pressing on an upper composite rubber sheet, a steel wire rope and a lower composite rubber sheet together, and cutting off redundant rubber sheets on two sides of the width to form a belt blank;

And 4, step 4: and (3) a vulcanization process: and (3) drawing the belt blank obtained by cold pressing into a flat plate of a vulcanizing machine for vulcanizing, wherein the temperature is controlled at 147-155 ℃, the time is 30-50 minutes, and the unit pressure is 2.5-3.5 MPa.

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

Natural rubber NR, styrene butadiene rubber SBR and butadiene rubber BR have oxygen indexes of 18-22% and belong to flammable rubber, and if the rubber material meets the flame retardant performance requirement of MT668-2008 standard, a large number of novel flame retardants are required to be selected, and through a large number of experimental researches, three novel flame retardants are finally selected, so that the flame retardant performance is well solved, and the physical and mechanical properties are guaranteed. One is a nitrogen-phosphorus intumescent flame retardant lubricant NPFR, one is an organosilicon flame retardant DM20, the other is an American product reinforcing flame retardant S80, the three flame retardants are high-efficiency environment-friendly flame retardants successfully developed at home and abroad in recent years, the three flame retardants form a very effective flame retardant system, and then are used together with conventional flame retardants such as antimony trioxide, a flame retardant lubricant MB202 and chlorinated paraffin in a scientific and reasonable proportion, the flame retardant property of the rubber material reaches the quality level comparable to that of a chloroprene rubber formula, the physical and mechanical properties such as strength and abrasion are greatly improved, the cost is greatly reduced, and the cost of the prepared covering rubber per kilogram is saved by about 10 yuan according to a better proportion. The core glue prepared according to a better proportion has the properties of strength, adhesion, flame retardance and the like which completely meet the standard requirements, and the cost of each kilogram of core glue is saved by about 8 yuan. The formula with a better proportion is adopted for batch production, taking a steel wire rope core flame-retardant conveyor belt with the model ST/S1250 as an example, the material cost can be saved by about 200 yuan per square meter, the material cost can be saved by 2 ten thousand yuan per 100 meters, the material cost can be saved by 200 ten thousand yuan if 10000 meters, and the economic benefit is very considerable.

The application adopts the wire rope core flame-retardant conveyor belt produced by the non-neoprene formula with better proportioning, and the non-neoprene cover rubber is detected by a company quality inspection department: tensile strength of 18.5MPa, elongation at break of 510%, alcohol blast burner burning for 1.5 s, DIN roller abrasion of 168mm³ non-neoprene core glue: the tensile strength is 17.7MPa, the elongation at break is 450 percent, the alcohol blast burner burns for 2.6 seconds, the drawing force of the steel wire rope with the diameter of phi 5.5mm is 160N/mm, and all indexes completely meet the MT668-2008 standard requirement.

drawings

in order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a cross-section of a conveyor belt sample block produced according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.