CN113861524A - Conveyer belt covering rubber and preparation method thereof - Google Patents
Conveyer belt covering rubber and preparation method thereof Download PDFInfo
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- CN113861524A CN113861524A CN202111382185.3A CN202111382185A CN113861524A CN 113861524 A CN113861524 A CN 113861524A CN 202111382185 A CN202111382185 A CN 202111382185A CN 113861524 A CN113861524 A CN 113861524A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 96
- 239000005060 rubber Substances 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 75
- 239000003063 flame retardant Substances 0.000 claims abstract description 53
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 25
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 23
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 23
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 21
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 21
- 229920001194 natural rubber Polymers 0.000 claims abstract description 21
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000004902 Softening Agent Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 48
- 150000001875 compounds Chemical class 0.000 claims description 28
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000004073 vulcanization Methods 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000012188 paraffin wax Substances 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 6
- 238000003490 calendering Methods 0.000 claims description 6
- 239000004200 microcrystalline wax Substances 0.000 claims description 5
- 235000019808 microcrystalline wax Nutrition 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 claims description 5
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 5
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 4
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 2
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims 2
- 230000003078 antioxidant effect Effects 0.000 claims 2
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims 1
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 claims 1
- 239000004744 fabric Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- WUOBERCRSABHOT-UHFFFAOYSA-N diantimony Chemical compound [Sb]#[Sb] WUOBERCRSABHOT-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a conveyor belt covering rubber which comprises the following components in parts by weight: 60-70 parts of natural rubber, 30-40 parts of butadiene rubber, 40-60 parts of carbon black, 1-3 parts of a softening agent, 1-3 parts of an anti-aging agent, 20-40 parts of a flame retardant, 10-20 parts of an anti-adhesion agent and 5-8 parts of a vulcanizing agent. According to the conveyor belt covering rubber, natural rubber and butadiene rubber are used together, the flame retardant and the anti-adhesion agent are added in the formula, so that the flame retardant performance and the anti-adhesion icing performance of the conveyor belt are enhanced, the actual service life of the conveyor belt is prolonged, the prepared product simultaneously meets two standard requirements of a GB/T10822-2014 general purpose fabric core flame retardant conveyor belt and a HG/T3647-2014 cold-resistant conveyor belt, and the cold resistance, the anti-adhesion performance and the flame retardant performance of the conveyor belt are improved.
Description
Technical Field
The invention relates to the technical field of rubber conveying belts, in particular to a conveying belt covering rubber and a preparation method thereof.
Background
The conveyer belt is widely applied to the industrial transportation fields of coal mines, power plants, cement, steel, mines and the like. Different application areas, the conveyer belt transports the material characteristic difference, and the conveyer belt needs to possess special characteristics such as cold-resistant, wear-resisting, fire-retardant, antiseized adhesion, is applicable to the cold specific coal mine condition transportation that freezes in the north. Under extreme operating mode, the conveyer belt product is because the weather is cold, and opencut coal mine conveyer belt freezes easily, and the piling up of transportation material can't move on the conveyer belt, leads to conveyer belt and conveyer to seriously damage, surpasses for the customer and becomes serious loss.
Aiming at the problems, the invention mainly solves the problems by combining the characteristics of the materials such as natural rubber, butadiene rubber, flame retardant and anti-adhesion agent through a large number of experiments according to the requirements of icing of different severe cold open coal mine conditions in the north on the performance of the conveyer belt and aiming at the use working condition in extremely severe cold weather through a large number of experiments.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the conveyor belt covering rubber which has the advantages of good flame retardant property, excellent anti-adhesion icing property and long service life.
The technical scheme adopted by the invention is as follows:
the conveyor belt covering rubber comprises the following components in parts by weight: 60-70 parts of natural rubber, 30-40 parts of butadiene rubber, 40-60 parts of carbon black, 1-3 parts of a softening agent, 1-3 parts of an anti-aging agent, 20-40 parts of a flame retardant, 10-20 parts of an anti-adhesion agent and 5-8 parts of a vulcanizing agent.
Preferably, the conveyor belt is covered with rubber, wherein the softening agent is one or more selected from microcrystalline wax, paraffin, rubber oil and coumarone.
Preferably, the conveying belt is covered with rubber, wherein the anti-aging agent is one or more selected from anti-aging agent RD, anti-aging agent 4020 and anti-aging agent MB.
Preferably, the conveyor belt cover rubber is prepared by mixing a flame retardant and a flame retardant, wherein the flame retardant is one or more selected from chlorinated paraffin, antimony trioxide, zinc borate and aluminum hydroxide.
Preferably, the conveyer belt cover rubber is prepared by mixing a carrier belt cover rubber and an anti-adhesion agent, wherein the anti-adhesion agent is one or more selected from ultrahigh molecular weight polyethylene, oleamide and mercapto silicone oil.
Preferably, the conveyor belt is covered with rubber, wherein the vulcanizing agent is one or more selected from sulfur, vulcanizing agent DTDM and insoluble sulfur.
When the strength requirement of the covering adhesive is more than 15MPa, the elongation is more than 350 percent, and the abrasion is less than 200mm3When the temperature of the use environment is 45 ℃ below zero, the natural rubber, the butadiene rubber, the flame retardant and the anti-adhesion agent are sequentially as follows according to the mass ratio: 8:2:3:1.
When the strength requirement of the covering adhesive is more than 18MPa, the elongation is more than 400 percent, and the abrasion is less than 100mm3When the temperature of the use environment is below 50 ℃, the natural rubber, the butadiene rubber, the flame retardant and the anti-adhesion agent are sequentially as follows according to the mass ratio: 7:3:3:1.5.
When the strength requirement of the covering adhesive is more than 24MPa, the elongation is more than 450 percent, and the abrasion is less than 120mm3When the temperature of the use environment is below 50 ℃, the natural rubber, the butadiene rubber, the flame retardant and the anti-adhesion agent are sequentially as follows according to the mass ratio: 7.5:2.5:3:2.
A preparation method of conveyor belt covering rubber comprises the following steps:
(1) preparation of a first-stage rubber compound: adding 60-70 parts of natural rubber into an internal mixer for plasticating, then adding 30-40 parts of butadiene rubber for mixing, then adding 40-60 parts of carbon black, 1-3 parts of softener, 1-3 parts of anti-aging agent, 20-40 parts of flame retardant and 10-20 parts of anti-adhesion agent for mixing, controlling the mixing temperature to be 90-95 ℃, obtaining a first-stage mixed rubber, and cooling to room temperature;
(2) preparation of the two-stage rubber compound: mixing the first-stage mixing rubber obtained in the step (1) and 5-8 parts of vulcanizing agent in an internal mixer for 60-80 seconds, controlling the mixing temperature to be 90-100 ℃ to obtain second-stage mixing rubber, and cooling to room temperature;
(3) preparing a three-section extrusion mixing rubber sheet: putting the two-section rubber compound obtained in the step (2) into a calender for extruding to obtain a three-section extruded rubber compound;
(4) and (3) vulcanization: and (4) forming the three-section extruded mixing rubber sheet in the step (3) into a belt blank by a forming machine, and vulcanizing by a vulcanizing machine to obtain the super wear-resistant cold-resistant flame-retardant anti-adhesion conveying belt.
Preferably, in the preparation method of the conveyor belt cover rubber, the plastication time in the step (1) is 30-40 seconds, and the mixing time is 20-30 seconds.
Preferably, the preparation method of the conveyer belt cover rubber is characterized in that in the step (3), the extrusion temperature is controlled to be 90-105 ℃, and the calendering speed is controlled to be 5-8 m/s.
Preferably, in the preparation method of the conveyor belt cover rubber, in the step (4), the vulcanization temperature is controlled to be 145-150 ℃, the vulcanization time is controlled to be 40-50 minutes, and the vulcanization pressure is controlled to be 10-12 MPa.
The cold resistance and wear resistance of the conveyor belt covering rubber in the formula are improved by combining the cold resistance brittleness temperature of the natural raw rubber of-50 to-70 ℃, the cold resistance brittleness temperature of the cis-butadiene rubber of-70 ℃ and the excellent wear resistance of the cis-butadiene rubber.
The invention has the advantages that:
according to the conveyor belt covering rubber, natural rubber and butadiene rubber are used together, the flame retardant and the anti-adhesion agent are added in the formula, so that the flame retardant performance and the anti-adhesion icing performance of the conveyor belt are enhanced, the actual service life of the conveyor belt is prolonged, the prepared product simultaneously meets two standard requirements of a GB/T10822-2014 general purpose fabric core flame retardant conveyor belt and a HG/T3647-2014 cold-resistant conveyor belt, and the cold resistance, the anti-adhesion performance and the flame retardant performance of the conveyor belt are improved.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The conveyor belt covering rubber comprises the following components in parts by weight: 60 parts of natural rubber, 40 parts of butadiene rubber, 40 parts of carbon black, 1 part of softener (coumarone, microcrystalline wax), 1 part of anti-aging agent (anti-aging agent RD and anti-aging agent 4020: 1), 20 parts of flame retardant (chlorinated paraffin, antimony trioxide, aluminum hydroxide, zinc borate: 7:1:4:5), 10 parts of anti-adhesion agent (mercapto silicone oil, oleamide: 5:3), and 5 parts of vulcanizing agent (sulfur, vulcanizing agent DTDM: 1).
A preparation method of conveyor belt covering rubber comprises the following steps:
(1) preparation of a first-stage rubber compound: adding 60 parts of natural rubber into an internal mixer for plasticating for 30-40 seconds, then adding 40 parts of butadiene rubber for mixing for 20-30 seconds, then adding 40 parts of carbon black, 1 part of softener, 1 part of anti-aging agent, 20 parts of flame retardant and 150 parts of anti-adhesion agent, controlling the mixing temperature at 90-95 ℃ to obtain a first-stage mixed rubber, and cooling to room temperature;
(2) preparation of the two-stage rubber compound: 5 parts of the primary mixing gum prepared in the step (1) and a vulcanizing agent. Continuously putting the mixture into an internal mixer for mixing for 60-80 seconds, controlling the mixing temperature at 90-100 ℃ to obtain two-stage rubber compound, and cooling to room temperature;
(3) preparing a three-section extrusion mixing rubber sheet: extruding the two-stage rubber compound in a calender, wherein the extrusion temperature is controlled to be 90-105 ℃, and the calendering speed is controlled to be 5-8 m/s, so as to obtain a three-stage extruded rubber sheet;
(4) and (3) vulcanization: and (3) after the three-section mixing rubber sheet is molded into a belt blank by a molding machine, vulcanizing by a vulcanizing machine, controlling the vulcanizing temperature to be 145-150 ℃, controlling the vulcanizing time to be 40-50 minutes, and controlling the vulcanizing pressure to be 10-12 MPa to obtain the ultra-wear-resistant cold-resistant flame-retardant anti-adhesion conveying belt.
Example 2
The conveyor belt covering rubber comprises the following components in parts by weight: 70 parts of natural rubber, 30 parts of butadiene rubber, 60 parts of carbon black, 3 parts of a softener (coumarone, microcrystalline wax-3: 1), 3 parts of an anti-aging agent (anti-aging agent RD and anti-aging agent 4020-1: 1), 40 parts of a flame retardant (chlorinated paraffin, diantimony trioxide, aluminum hydroxide, zinc borate-7: 1:4:5), 20 parts of an anti-adhesion agent (mercapto silicone oil, oleamide-5: 3) and 8 parts of a vulcanizing agent (sulfur, vulcanizing agent DTDM-1: 1).
A preparation method of conveyor belt covering rubber comprises the following steps:
(1) preparation of a first-stage rubber compound: putting 70 parts of natural rubber into an internal mixer for plasticating for 30-40 seconds, then adding 30 parts of butadiene rubber for mixing for 20-30 seconds, then adding 60 parts of carbon black, 3 parts of softener, 3 parts of anti-aging agent, 40 parts of flame retardant and 20 parts of anti-adhesion agent, controlling the mixing temperature at 90-95 ℃ to obtain a first-stage mixed rubber, and cooling to room temperature;
(2) preparation of the two-stage rubber compound: 8 parts of the primary mixing gum prepared in the step (1) and 8 parts of vulcanizing agent. Continuously putting the mixture into an internal mixer for mixing for 60-80 seconds, controlling the mixing temperature at 90-100 ℃ to obtain two-stage rubber compound, and cooling to room temperature;
(3) preparing a three-section extrusion mixing rubber sheet: extruding the two-stage rubber compound in a calender, wherein the extrusion temperature is controlled to be 90-105 ℃, and the calendering speed is controlled to be 5-8 m/s, so as to obtain a three-stage extruded rubber sheet;
(4) and (3) vulcanization: and (3) after the three-section mixing rubber sheet is molded into a belt blank by a molding machine, vulcanizing by a vulcanizing machine, controlling the vulcanizing temperature to be 145-150 ℃, controlling the vulcanizing time to be 40-50 minutes, and controlling the vulcanizing pressure to be 10-12 MPa to obtain the ultra-wear-resistant cold-resistant flame-retardant anti-adhesion conveying belt.
Example 3
The conveyor belt covering rubber comprises the following components in parts by weight: 65 parts of natural rubber, 35 parts of butadiene rubber, 50 parts of carbon black, 2 parts of a softener (coumarone, microcrystalline wax is 3:1), 2 parts of an anti-aging agent (anti-aging agent RD and anti-aging agent 4020 is 1:1), 30 parts of a flame retardant (chlorinated paraffin, diantimony trioxide, aluminum hydroxide, zinc borate is 7:1:4:5), 15 parts of an anti-adhesion agent (mercapto silicone oil, oleamide is 5:3), and 6 parts of a vulcanizing agent (sulfur, vulcanizing agent DTDM is 1: 1).
A preparation method of conveyor belt covering rubber comprises the following steps:
(1) preparation of a first-stage rubber compound: putting 65 parts of natural rubber into an internal mixer for plasticating for 30-40 seconds, adding 35 parts of butadiene rubber for mixing for 20-30 seconds, then adding 50 parts of carbon black, 2 parts of softener, 2 parts of anti-aging agent, 30 parts of flame retardant and 15 parts of anti-adhesion agent, controlling the mixing temperature at 90-95 ℃ to obtain a first-stage mixed rubber, and cooling to room temperature;
(2) preparation of the two-stage rubber compound: continuously putting the first-stage rubber compound prepared in the step (1) and 6 parts of vulcanizing agent into an internal mixer for mixing for 60-80 seconds, controlling the mixing temperature at 90-100 ℃ to obtain a second-stage rubber compound, and cooling to room temperature;
(3) preparing a three-section extrusion mixing rubber sheet: extruding the two-stage rubber compound in a calender, wherein the extrusion temperature is controlled to be 90-105 ℃, and the calendering speed is controlled to be 5-8 m/s, so as to obtain a three-stage extruded rubber sheet;
(4) and (3) vulcanization: and (3) after the three-section extruded mixing rubber sheet is molded into a belt blank by a molding machine, vulcanizing by a vulcanizing machine, controlling the vulcanizing temperature to be 145-150 ℃, the vulcanizing time to be 40-50 minutes and the vulcanizing pressure to be 10-12 MPa, thus obtaining the ultra-wear-resistant cold-resistant flame-retardant anti-adhesion conveyer belt.
Comparative example 3
The conveyor belt covering rubber comprises the following components in parts by weight:
65 parts of natural rubber, 35 parts of butadiene rubber, 50 parts of carbon black, 2 parts of a softener (coumarone, microcrystalline wax is 3:1), 2 parts of an anti-aging agent (anti-aging agent RD and anti-aging agent 4020 is 1:1), 30 parts of a flame retardant (chlorinated paraffin, antimony trioxide, aluminum hydroxide, zinc borate is 7:1:4:5), 0 part of an anti-adhesion agent and 6 parts of a vulcanizing agent (sulfur and vulcanizing agent DTDM is 1: 1).
A preparation method of conveyor belt covering rubber comprises the following steps:
(1) preparation of a first-stage rubber compound: putting 65 parts of natural rubber into an internal mixer for plasticating for 30-40 seconds, adding 35 parts of butadiene rubber for mixing for 20-30 seconds, then adding 50 parts of carbon black, 2 parts of softener, 2 parts of anti-aging agent, 30 parts of flame retardant and 0 part of anti-adhesion agent, controlling the mixing temperature at 90-95 ℃ to obtain a first-stage mixed rubber, and cooling to room temperature;
(2) preparation of the two-stage rubber compound: continuously putting the first-stage rubber compound prepared in the step (1) and 6 parts of vulcanizing agent into an internal mixer for mixing for 60-80 seconds, controlling the mixing temperature at 90-100 ℃ to obtain a second-stage rubber compound, and cooling to room temperature;
(3) preparing a three-section extrusion mixing rubber sheet: extruding the two-stage rubber compound in a calender, wherein the extrusion temperature is controlled to be 90-105 ℃, and the calendering speed is controlled to be 5-8 m/s, so as to obtain a three-stage extruded rubber sheet;
(4) and (3) vulcanization: and (3) after the three-section mixing rubber sheet is molded into a belt blank by a molding machine, vulcanizing by a vulcanizing machine, controlling the vulcanizing temperature to be 145-150 ℃, controlling the vulcanizing time to be 40-50 minutes, and controlling the vulcanizing pressure to be 10-12 MPa to obtain the ultra-wear-resistant cold-resistant flame-retardant anti-adhesion conveying belt.
The super wear-resistant cold-resistant flame-retardant anti-adhesion conveyor belt covering rubber prepared in examples 1 to 3 and comparative example 3 was subjected to basic mechanical property tests, and the specific results are shown in table 1.
TABLE 1
| Test items | Standard of merit | Example 1 | Example 2 | Example 3 | Comparative example 3 |
| 300% definite elongation/MPa | - | 9.7 | 10.3 | 10.1 | 10.1 |
| Tensile strength/MPa | ≥24 | 24.8 | 25.8 | 25.2 | 25.3 |
| Elongation/percent | ≥450 | 592 | 618 | 615 | 613 |
| hardness/Shore A | - | 63 | 64 | 64 | 66 |
| Abrasion mm3 | ≤120 | 80 | 60 | 72 | 70 |
As can be seen from Table 1, the addition of the anti-adhesion agent in example 3 and the absence of the anti-adhesion agent in comparative example 3 have no significant effect on the basic mechanical properties of the formulation and have no effect on the service life of the flame-retardant conveyor belt, such as mechanical strength use and the like.
The super wear-resistant cold-resistant flame-retardant anti-adhesion conveyor belt covering rubber prepared in examples 1 to 3 and comparative example 3 was subjected to a cold resistance test, and the test results are shown in table 2.
TABLE 2
As can be seen from Table 2, the natural rubber and the butadiene rubber are used together in the formula, so that the cold resistance is excellent, and in the example 3 and the comparative example 3, the anti-adhesion agent has little influence on the cold resistance of the flame-retardant conveyor belt.
The super wear-resistant cold-resistant flame-retardant anti-adhesion conveyor belt cover rubber prepared in examples 1 to 3 and comparative example 3 was subjected to a flame-retardant performance test, and the test results are shown in table 3.
TABLE 3
As can be seen from Table 3, the flame retardant property of the formulation changes with the change of the amount of the flame retardant, but the anti-adhesion agent has little influence on the flame retardant property of the flame retardant conveyor belt in example 3 and comparative example 3.
The super wear-resistant cold-resistant flame-retardant anti-adhesion conveyor belt cover rubber prepared in examples 1 to 3 and comparative example 3 was subjected to an anti-adhesion performance test, and the test results are shown in table 4.
TABLE 4
As can be seen from Table 4, the anti-adhesion performance of the formula changes with the change of the dosage of the anti-adhesion agent, and the anti-adhesion effect of the anti-adhesion agent on the flame retardant conveyor belt is obvious from example 3 and comparative example 3.
According to the conveyor belt covering rubber, natural rubber and butadiene rubber are used together, the flame retardant and the anti-adhesion agent are added in the formula, so that the flame retardant performance and the anti-adhesion icing performance of the conveyor belt are enhanced, the actual service life of the conveyor belt is prolonged, the prepared product simultaneously meets two standard requirements of a GB/T10822-2014 general purpose fabric core flame retardant conveyor belt and a HG/T3647-2014 cold-resistant conveyor belt, and the technical difficulty of the flame retardant conveyor belt in the aspects of cold resistance and release adhesion performance is overcome.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The conveyor belt covering rubber is characterized by comprising the following components in parts by weight: 60-70 parts of natural rubber, 30-40 parts of butadiene rubber, 40-60 parts of carbon black, 1-3 parts of a softening agent, 1-3 parts of an anti-aging agent, 20-40 parts of a flame retardant, 10-20 parts of an anti-adhesion agent and 5-8 parts of a vulcanizing agent.
2. The conveyor belt cover compound of claim 1, wherein the softening agent is selected from one or more of microcrystalline wax, paraffin wax, rubber oil, and coumarone.
3. The conveyor belt cover rubber according to claim 1, wherein the antioxidant is one or more selected from the group consisting of antioxidant RD, antioxidant 4020 and antioxidant MB.
4. The conveyor belt cover rubber according to claim 1, wherein the flame retardant is one or more selected from chlorinated paraffin, antimony trioxide, zinc borate and aluminum hydroxide.
5. The conveyor belt cover rubber according to claim 1, wherein the anti-adhesion agent is one or more selected from the group consisting of ultra-high molecular weight polyethylene, oleamide and mercapto silicone oil.
6. The conveyor belt cover compound of claim 1, wherein the vulcanizing agent is selected from one or more of sulfur, vulcanizing agent DTDM and insoluble sulfur.
7. The preparation method of the conveyor belt covering rubber is characterized by comprising the following steps:
(1) preparation of a first-stage rubber compound: adding 60-70 parts of natural rubber into an internal mixer for plasticating, then adding 30-40 parts of butadiene rubber for mixing, then adding 40-60 parts of carbon black, 1-3 parts of softener, 1-3 parts of anti-aging agent, 20-40 parts of flame retardant and 10-20 parts of anti-adhesion agent for mixing, controlling the mixing temperature to be 90-95 ℃, obtaining a first-stage mixed rubber, and cooling to room temperature;
(2) preparation of the two-stage rubber compound: mixing the first-stage mixing rubber obtained in the step (1) and 5-8 parts of vulcanizing agent in an internal mixer for 60-80 seconds, controlling the mixing temperature to be 90-100 ℃ to obtain second-stage mixing rubber, and cooling to room temperature;
(3) preparing a three-section extrusion mixing rubber sheet: putting the two-section rubber compound obtained in the step (2) into a calender for extruding to obtain a three-section extruded rubber compound;
(4) and (3) vulcanization: and (4) forming the three-section extruded mixing rubber sheet in the step (3) into a belt blank by a forming machine, and vulcanizing by a vulcanizing machine to obtain the super wear-resistant cold-resistant flame-retardant anti-adhesion conveying belt.
8. The preparation method of the conveyor belt cover rubber according to claim 7, wherein the plastication time in the step (1) is 30-40 seconds, and the mixing time is 20-30 seconds.
9. The preparation method of the conveyor belt cover rubber according to claim 7, wherein the extrusion temperature in the step (3) is controlled to be 90-105 ℃, and the calendering speed is controlled to be 5-8 m/s.
10. The preparation method of the conveyor belt cover rubber according to claim 7, wherein in the step (4), the vulcanization temperature is controlled to be 145-150 ℃, the vulcanization time is controlled to be 40-50 minutes, and the vulcanization pressure is controlled to be 10-12 MPa.
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| CN115710386A (en) * | 2022-12-22 | 2023-02-24 | 安徽中意胶带有限责任公司 | High-wear-resistance flame-retardant conveyor belt covering rubber and preparation method thereof |
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Application publication date: 20211231 |