CN115838516A - Production formula and production process of high-performance whole-core flame-retardant conveyor belt color master batch - Google Patents
Production formula and production process of high-performance whole-core flame-retardant conveyor belt color master batch Download PDFInfo
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- CN115838516A CN115838516A CN202211657921.6A CN202211657921A CN115838516A CN 115838516 A CN115838516 A CN 115838516A CN 202211657921 A CN202211657921 A CN 202211657921A CN 115838516 A CN115838516 A CN 115838516A
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Abstract
The invention discloses a production formula of a high-performance whole-core flame-retardant conveyor belt color master batch, which comprises the following raw materials in parts by mass: 44-46 parts of PVC, 8-10 parts of nitrile rubber powder, 5-6 parts of anhydrous aluminum hydroxide, 5-6 parts of inorganic filler, 0.8-1 part of reinforcing carbon black, 0.8-1 part of composite stabilizer, 0.8-1 part of lubricant, 19-21 parts of DOP, 3-4 parts of TCEP, 5-6 parts of chlorinated paraffin, 2-3 parts of antistatic agent and 1-2 parts of liquid stabilizer; the invention also discloses a production process of the high-performance flame-retardant colored master batch material for conveying. The formula of the invention reasonably and effectively prepares a flame-retardant system, a plasticizing system, an antistatic system, a reinforcing system, a wear-resistant system, a stabilizing system and the like, provides a corresponding production process, and the color master batch produced by the invention has excellent performance and low price.
Description
Technical Field
The invention relates to a production formula and a production process of a high-performance colored master batch for a whole-core flame-retardant conveyor belt, and belongs to the technical field of production of whole-core flame-retardant conveyor belts.
Background
With the development of large-scale and mechanization of the coal mine industry, the whole core flame-retardant conveyor belt with large transportation volume and long service life is more and more widely applied. This requires that the color masterbatch used for the whole core flame retardant transport has the following characteristics: (1) the comprehensive physical and mechanical properties of the product meet the standard requirements; (2) the main physical and mechanical performance indexes of the product are excellent (such as abrasion resistance, adhesive strength, tensile strength, flame retardance, antistatic property and the like); (3) the product quality is stable; (4) the price is low.
But the original color master batch material formula has the following defects in the production process and the produced whole core flame-retardant conveyor belt:
1. when the lead stabilizer is matched with a large amount of lubricant, the color master batch is subjected to secondary vulcanization extrusion and bonding, so that the adhesive strength of a covering layer and a core body is low, and the covering layer is easy to frost;
2. the flame retardant system adopts single trichloroethyl phosphate (TCEP for short), the dosage is large, the price of the product is high at present, and the cost is high;
3. the plasticizing system only adopts single dioctyl phthalate (DOP for short), the same dosage is larger, and the price of the product is higher at present, so the cost is high;
4. in order to ensure the antistatic performance of the product excessively, the antistatic system is used in a large amount, so that more precipitates are generated on the surface of the product.
5. The wear resistance of the product is not high due to incomplete modification of polyvinyl chloride (PVC for short).
Aiming at the problems, the invention redesigns the formula of the color master batch, so that the produced color master batch has excellent performance and low price.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a production formula of a high-performance whole-core flame-retardant conveyor belt colored master batch material, and aims to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: a production formula of a high-performance whole-core flame-retardant conveyor belt color master batch material comprises the following raw materials in parts by mass: 44-46 parts of PVC, 8-10 parts of nitrile rubber powder, 5-6 parts of anhydrous aluminum hydroxide, 5-6 parts of inorganic filler, 0.8-1 part of reinforcing carbon black, 0.8-1 part of composite stabilizer, 0.8-1 part of lubricant, 19-21 parts of DOP, 3-4 parts of TCEP, 5-6 parts of chlorinated paraffin, 2-3 parts of antistatic agent and 1-2 parts of liquid stabilizer.
Preferably, the feed comprises the following raw materials in parts by mass: 45 parts of PVC, 9 parts of nitrile rubber powder, 5.4 parts of anhydrous aluminum hydroxide, 5.4 parts of inorganic filler, 0.9 part of reinforcing carbon black, 0.9 part of composite stabilizer, 0.9 part of lubricant, 19.8 parts of DOP, 3.6 parts of TCEP, 5.4 parts of chlorinated paraffin, 2.3 parts of antistatic agent and 1.4 parts of liquid stabilizer.
Preferably, the PVC, the nitrile rubber powder, the anhydrous aluminum hydroxide, the inorganic filler, the reinforcing carbon black, the composite stabilizer and the lubricant are powdery materials, and the DOP, the TCEP, the chlorinated paraffin, the antistatic agent and the liquid stabilizer are liquid materials.
A production process of a high-performance whole-core flame-retardant conveyor belt colored master batch material comprises the following steps:
(1) Weighing various raw materials according to a formula for later use;
(2) Starting the mixing stirrer at the rotating speed of 120-150r/min, firstly putting PVC into the mixing stirrer, and then adding the composite stabilizer into the mixing stirrer;
(3) After 2-3 minutes, adjusting the rotating speed of the mixing stirrer to 1100-1200r/min;
(4) Stirring until the temperature of the materials in the mixing stirrer reaches 50-55 ℃, adding the weighed and mixed DOP, TCEP, chlorinated paraffin, antistatic agent and liquid stabilizer into the mixing stirrer after mixing, and maintaining the rotating speed of the mixing stirrer at 1100-1200r/min;
(5) Continuously stirring until the temperature of materials in the mixing stirrer reaches 85-90 ℃, sequentially adding the weighed anhydrous aluminum hydroxide, the inorganic filler, the reinforcing carbon black and the lubricant into the mixing stirrer, continuously stirring the materials until the temperature reaches 105-110 ℃, maintaining the rotating speed of the mixing stirrer at 1100-1200r/min, preparing to open a pneumatic valve of the mixing stirrer, and discharging;
(6) Starting a cooling stirrer, opening a cooling water circulation system, putting the mixture in the mixing stirrer into the cooling stirrer through a pneumatic valve, cooling the mixture through water circulation, adding nitrile rubber powder when the temperature of the mixture is reduced to below 50-53 ℃, continuously stirring for 5-10 minutes to obtain a master batch, and putting the uniformly mixed master batch into a master batch storage device;
(7) Transporting the master batch to a screw extruder charging barrel by using a negative pressure pumping system, wherein the screw extruder charging barrel is divided into five barrels, and the temperatures are respectively set to be 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 160-165 ℃; keeping the temperature of the extruder barrel for 30min after the temperature reaches the set temperature, setting the rotating speed of the extruder to be 800-900r/min and the granulating rotating speed to be 140-160r/min, starting master batch granulation, cooling the master batch by a cyclone tower, and then storing the master batch in a colored master batch storage device;
(8) And (5) checking the color master batch.
The principle of the invention is as follows:
the new formula determines a stable system, a plasticizing system, a flame-retardant system and a lubricating system according to the performance of raw materials and the design requirements of the formula, and the dosage of the materials meeting the requirements of antistatic property, wear resistance, tensile property and the like.
The PVC is a main material of SG-3 type PVC, PVC is extremely sensitive to heat, slight thermal decomposition reaction can occur when the heating temperature is higher than 90 ℃, the decomposition reaction is intensified when the temperature reaches 120 ℃, and the PVC is gradually changed from original white to yellow-red-brown-black in 10 minutes at 150 ℃. In order to ensure that PVC is not decomposed in the stirring and heating extrusion processes, a bistable system with a liquid barium-cadmium stabilizer as a main component and a high-efficiency composite stabilizer as an auxiliary component is adopted to replace a lead stabilizer. The catalytic degradation of the hydrogen chloride is prevented by capturing the hydrogen chloride generated by the thermal decomposition of the PVC. The two stabilizers have excellent light and heat stability and dispersibility, greatly improve the uniformity of mixing and dispersing with PVC, and are beneficial to production and quality management.
Secondly, the flame retardant property of the color master batch material is required to reach the MT/T914-2019 standard, the PVC has excellent flame retardant property, but the flame retardant property is reduced after the plasticizer, the modifier and other materials are added, a flame retardant system is redesigned in the formula, the flame retardant system mainly comprising TCEP and secondarily comprising anhydrous aluminum hydroxide and chlorinated paraffin is adopted, the flame retardant property of the color master batch material is ensured to reach the standard, the amount of the TCEP is reduced through the three flame retardant systems, and the reduction of the material cost is realized.
Thirdly, the plasticizing system has the effects of weakening the acting force among PVC molecular chains, reducing the vitrification temperature, the flowing temperature and the melting point of the contained microcrystal, increasing the fluidity, improving the processing performance and the low temperature resistance, influencing the indexes of the coloring master batch, such as the tensile strength, the impact elasticity, the Shore hardness and the like, and reducing the dosage of DOP by using DOP as a main plasticizer and chlorinated paraffin as an auxiliary plasticizer in a new formula through comprehensive comparison, thereby realizing the reduction of the material cost.
Fourthly, the dosage of the antistatic agent is reduced, and the indexes can be reached through experiments.
Fifthly, the dosage of the nitrile rubber powder which is a modified material with good compatibility with PVC is increased, and the wear resistance of the whole core flame-retardant conveyor belt is improved.
And sixthly, a lubricating system is changed, and polyethylene wax (PE wax for short) with good external lubricity is used, so that the melt fluidity of PVC is increased, the adhesion of the master batch to metal surfaces of an extruder and a die is effectively improved, and the processing of the color master batch is facilitated.
The invention has the beneficial effects that: compared with the original formula, the formula of the invention is reasonably and effectively provided with a flame retardant system, a plasticizing system, an antistatic system, a reinforcing system, a wear-resistant system, a stabilizing system and the like, and provides a corresponding production process.
Drawings
FIG. 1 is a flow chart of the production process of the present invention.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1:
a production formula of a high-performance whole-core flame-retardant conveyor belt color master batch material comprises the following raw materials in parts by mass: the composite material comprises the following raw materials in parts by mass: 45 parts of PVC, 9 parts of nitrile rubber powder, 5.4 parts of anhydrous aluminum hydroxide, 5.4 parts of inorganic filler, 0.9 part of reinforcing carbon black, 0.9 part of composite stabilizer, 0.9 part of lubricant, 19.8 parts of DOP, 3.6 parts of TCEP, 5.4 parts of chlorinated paraffin, 2.3 parts of antistatic agent and 1.4 parts of liquid stabilizer.
Preferably, the PVC, the nitrile rubber powder, the anhydrous aluminum hydroxide, the inorganic filler, the reinforcing carbon black, the composite stabilizer and the lubricant are powdery materials, and the DOP, the TCEP, the chlorinated paraffin, the antistatic agent and the liquid stabilizer are liquid materials.
A production process of a high-performance whole-core flame-retardant conveyor belt colored master batch material comprises the following steps:
(1) Weighing various raw materials according to a formula for later use;
(2) Starting a mixing stirrer at the rotating speed of 120r/min, firstly putting PVC into the mixing stirrer, and then adding the composite stabilizer into the mixing stirrer;
(3) After 2-3 minutes, adjusting the rotating speed of the mixing stirrer to 1100r/min;
(4) Stirring until the temperature of the materials in the mixing stirrer reaches 50 ℃, mixing the weighed and mixed DOP, the TCEP, the chlorinated paraffin, the antistatic agent and the liquid stabilizer, and then adding the mixture into the mixing stirrer, wherein the rotating speed of the mixing stirrer is maintained at 1100r/min;
(5) Continuously stirring until the temperature of materials in the mixing stirrer reaches 85 ℃, sequentially adding the weighed anhydrous aluminum hydroxide, the weighed inorganic filler, the weighed reinforcing carbon black and the weighed lubricant into the mixing stirrer, continuously stirring the materials until the temperature reaches 105 ℃, maintaining the rotating speed of the mixing stirrer at 1100r/min, preparing to open a pneumatic valve of the mixing stirrer, and discharging;
(6) Starting a cooling stirrer, opening a cooling water circulation system, putting the mixture in a mixing stirrer into the cooling stirrer through a pneumatic valve, cooling the mixture through water circulation, adding nitrile rubber powder when the temperature of the mixture is reduced to below 50 ℃, continuously stirring for 5 minutes to obtain a master batch, and putting the uniformly mixed master batch into a master batch storage device;
(7) Conveying the master batch to a screw extruder charging barrel by using a negative pressure pumping system, wherein the screw extruder charging barrel is divided into five barrels, and the temperatures are respectively set to 130 ℃, 140 ℃, 150 ℃, 155 ℃ and 160 ℃; keeping the temperature of the extruder barrel for 30min after the temperature reaches the set temperature, setting the rotating speed of the extruder to be 800-900r/min and the granulating rotating speed to be 140r/min, starting master batch granulation, cooling the master batch by a cyclone tower, and then storing the master batch in a color master batch storage device;
(8) And (5) checking the color master batch.
Through detection, various indexes of the color master batch disclosed by the invention are shown in the following table
As can be seen from the table above, the product performance of the color master batch material provided by the invention completely meets the product performance required by the standard, and the color master batch material has better performance and low price.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (4)
1. A production formula of a high-performance whole-core flame-retardant conveyor belt color master batch material is characterized in that: the composite material comprises the following raw materials in parts by mass: 44-46 parts of PVC, 8-10 parts of nitrile rubber powder, 5-6 parts of anhydrous aluminum hydroxide, 5-6 parts of inorganic filler, 0.8-1 part of reinforcing carbon black, 0.8-1 part of composite stabilizer, 0.8-1 part of lubricant, 19-21 parts of DOP, 3-4 parts of TCEP, 5-6 parts of chlorinated paraffin, 2-3 parts of antistatic agent and 1-2 parts of liquid stabilizer.
2. The production formula of the high-performance whole-core flame-retardant conveyor belt colored master batch according to claim 1, characterized in that: the composite material comprises the following raw materials in parts by mass: 45 parts of PVC, 9 parts of nitrile rubber powder, 5.4 parts of anhydrous aluminum hydroxide, 5.4 parts of inorganic filler, 0.9 part of reinforcing carbon black, 0.9 part of composite stabilizer, 0.9 part of lubricant, 19.8 parts of DOP, 3.6 parts of TCEP, 5.4 parts of chlorinated paraffin, 2.3 parts of antistatic agent and 1.4 parts of liquid stabilizer.
3. The production formula of the high-performance whole-core flame-retardant conveyor belt colored master batch according to claim 1, characterized in that: the PVC, the nitrile rubber powder, the anhydrous aluminum hydroxide, the inorganic filler, the reinforcing carbon black, the composite stabilizer and the lubricant are powdery materials, and the DOP, the TCEP, the chlorinated paraffin, the antistatic agent and the liquid stabilizer are liquid materials.
4. The process for producing the high-performance whole-core flame-retardant conveyor belt colored master batch according to any one of claims 1 to 3, wherein the process comprises the following steps: the method comprises the following steps:
weighing various raw materials according to a formula for later use;
starting the mixing stirrer at the rotating speed of 120-150r/min, firstly putting PVC into the mixing stirrer, and then adding the composite stabilizer into the mixing stirrer;
after 2-3 minutes, adjusting the rotating speed of the mixing stirrer to 1100-1200r/min;
stirring until the temperature of the materials in the mixing stirrer reaches 50-55 ℃, mixing the weighed and mixed DOP, TCEP, chlorinated paraffin, antistatic agent and liquid stabilizer, and adding the mixture into the mixing stirrer, wherein the rotating speed of the mixing stirrer is maintained at 1100-1200r/min;
continuously stirring until the temperature of materials in the mixing stirrer reaches 85-90 ℃, sequentially adding the weighed anhydrous aluminum hydroxide, the inorganic filler, the reinforcing carbon black and the lubricant into the mixing stirrer, continuously stirring the materials until the temperature reaches 105-110 ℃, maintaining the rotating speed of the mixing stirrer at 1100-1200r/min, preparing to open a pneumatic valve of the mixing stirrer, and discharging;
starting a cooling stirrer, opening a cooling water circulation system, putting the mixture in the mixing stirrer into the cooling stirrer through a pneumatic valve, cooling the mixture through water circulation, adding nitrile rubber powder when the temperature of the mixture is reduced to below 50-53 ℃, continuously stirring for 5-10 minutes to obtain a master batch, and putting the uniformly mixed master batch into a master batch storage device;
transporting the master batch to a screw extruder charging barrel by using a negative pressure pumping system, wherein the screw extruder charging barrel is divided into five barrels, and the temperatures are respectively set to be 130-135 ℃, 140-145 ℃, 150-155 ℃, 155-160 ℃ and 160-165 ℃; keeping the temperature of the extruder barrel for 30min after the temperature reaches the set temperature, setting the rotating speed of the extruder to be 800-900r/min and the granulating rotating speed to be 140-160r/min, starting master batch granulation, cooling the master batch by a cyclone tower, and then storing the master batch in a colored master batch storage device;
and (5) checking the color master batch.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348590A (en) * | 2007-07-19 | 2009-01-21 | 徐凤祥 | Special material for mining flame-retardant conveyer belt coating rubber and manufacturing method thereof |
| CN103524914A (en) * | 2012-07-03 | 2014-01-22 | 酒泉荣泰橡胶制品有限公司 | Flame-retardant conveying belt covering adhesive for mine and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348590A (en) * | 2007-07-19 | 2009-01-21 | 徐凤祥 | Special material for mining flame-retardant conveyer belt coating rubber and manufacturing method thereof |
| CN103524914A (en) * | 2012-07-03 | 2014-01-22 | 酒泉荣泰橡胶制品有限公司 | Flame-retardant conveying belt covering adhesive for mine and preparation method thereof |
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