CN113087974A - Cloth clamping diaphragm material for air brake chamber and preparation method thereof - Google Patents
Cloth clamping diaphragm material for air brake chamber and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 71
- 239000004744 fabric Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 140
- 239000005060 rubber Substances 0.000 claims abstract description 140
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 77
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 42
- 239000004014 plasticizer Substances 0.000 claims abstract description 36
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000012190 activator Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims description 60
- 239000005062 Polybutadiene Substances 0.000 claims description 38
- 150000001875 compounds Chemical class 0.000 claims description 33
- 238000007599 discharging Methods 0.000 claims description 30
- 239000012528 membrane Substances 0.000 claims description 18
- 239000006229 carbon black Substances 0.000 claims description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 239000011593 sulfur Substances 0.000 claims description 12
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 10
- 239000010692 aromatic oil Substances 0.000 claims description 10
- UEZWYKZHXASYJN-UHFFFAOYSA-N cyclohexylthiophthalimide Chemical group O=C1C2=CC=CC=C2C(=O)N1SC1CCCCC1 UEZWYKZHXASYJN-UHFFFAOYSA-N 0.000 claims description 10
- OUBMGJOQLXMSNT-UHFFFAOYSA-N N-isopropyl-N'-phenyl-p-phenylenediamine Chemical compound C1=CC(NC(C)C)=CC=C1NC1=CC=CC=C1 OUBMGJOQLXMSNT-UHFFFAOYSA-N 0.000 claims description 9
- 229920002857 polybutadiene Polymers 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical group [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 claims description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 14
- 239000013543 active substance Substances 0.000 description 8
- 239000011787 zinc oxide Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical group [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000010059 sulfur vulcanization Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2307/00—Characterised by the use of natural rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
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- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- 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
- C08K3/02—Elements
- C08K3/04—Carbon
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
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Abstract
The invention discloses a cloth clamping diaphragm material for an air brake chamber and a preparation method thereof, wherein the cloth clamping diaphragm material comprises the following raw materials in parts by weight: 55-65 parts of NR raw rubber, 35-45 parts of BR raw rubber, 8-13 parts of plasticizer, 3-5.5 parts of activator, 1.5-4 parts of anti-aging agent, 55-65 parts of reinforcing agent, 0.2-0.4 part of anti-scorching agent, 2-3.8 parts of vulcanizing agent and 0.4-0.65 part of accelerator. The preparation method of the cloth clamping diaphragm material for the air brake chamber provided by the invention is simple in process, the obtained material has high strength, high tear resistance and excellent fatigue resistance, good elasticity can be kept in a low-temperature environment, the cloth clamping diaphragm prepared by using the material has long service life, works smoothly, and ensures that braking is sensitive and effective.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a cloth clamping diaphragm material for an air brake chamber and a preparation method thereof.
Background
The air brake air chamber is a key component of an automobile brake system, plays an important role in driving safety, plays a key role in inflating and exhausting control when an automobile brake system is used for air braking, is also called as a spring brake cylinder and is used for providing braking force for wheels and is used for driving braking, and a rubber cloth clamping diaphragm arranged in the air brake chamber plays a key role in sealing air, has very high air pressure when the air brake chamber works and can do reciprocating motion, and simultaneously, the external environment temperature for vehicle use is also met, the performance of the rubber cloth clamping diaphragm assembled in the air brake chamber can directly influence the repeated working efficiency of the air brake chamber under high and low temperature environments, and is a key product for ensuring the effective work of the air brake chamber.
The cloth clamping membrane for the brake chamber requires materials with high strength, high tear resistance, excellent low temperature resistance and aging resistance and excellent fatigue resistance.
In the prior art, the cloth clamping diaphragm material for the brake chamber uses common NR raw rubber, the common reinforcing agent is fast extrusion carbon black, a common sulfur vulcanization system is used, the rubber material is easy to generate vulcanization reversion, and the manufactured rubber diaphragm has the defects of poor fatigue resistance, short service life and common low-temperature resistance.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides the cloth clamping diaphragm material for the air brake chamber and the preparation method thereof, the preparation method is simple in process, the obtained material has high strength, high tear resistance and excellent fatigue resistance, good elasticity can be kept in a low-temperature environment, the cloth clamping diaphragm prepared by using the cloth clamping diaphragm material is long in service life, smooth in work and sensitive and effective in braking.
The invention provides a cloth clamping diaphragm material for an air brake chamber, which comprises the following raw materials in parts by weight: 55-65 parts of NR raw rubber, 35-45 parts of BR raw rubber, 8-13 parts of plasticizer, 3-5.5 parts of activator, 1.5-4 parts of anti-aging agent, 55-65 parts of reinforcing agent, 0.2-0.4 part of anti-scorching agent, 2-3.8 parts of vulcanizing agent and 0.4-0.65 part of accelerator.
Preferably, the raw materials comprise the following components in parts by weight: 60 parts of NR raw rubber, 40 parts of BR raw rubber, 10 parts of plasticizer, 5 parts of activator, 3 parts of anti-aging agent, 58 parts of reinforcing agent, 0.3 part of anti-scorching agent, 3 parts of vulcanizing agent and 0.5 part of accelerator.
Preferably, the NR raw rubber has a Mooney viscosity ML (1+4) at 100 ℃ of 55 to 65; the BR crude rubber is butadiene rubber BR9000 with Mooney viscosity of 100 ℃ and ML (1+4) of 41-49.
Preferably, the plasticizer is an environmentally friendly plasticizer.
Preferably, the environment-friendly plasticizer is environment-friendly aromatic oil.
Preferably, the environment-friendly plasticizer is aromatic oil with the pour point less than or equal to minus 40 ℃.
Preferably, the active agent is activated zinc oxide; the reinforcing agent is high wear-resistant carbon black; the scorch retarder is N-cyclohexyl thiophthalimide; the anti-aging agent is a mixture of an anti-aging agent IPPD and an anti-aging agent TMQ.
Preferably, the vulcanizing agent is sulfur and the accelerator is accelerator DM.
Preferably, the vulcanizing agent is sulfur masterbatch.
The invention also provides a preparation method of the cloth clamping diaphragm material for the air brake chamber, which comprises the following steps:
s1, putting NR raw rubber, BR raw rubber, a plasticizer, an activator, an anti-aging agent, a reinforcing agent and an anti-scorching agent into a banburying device according to the weight ratio, mixing and discharging rubber to obtain primary rubber compound;
s2, placing the primary rubber compound, the vulcanizing agent and the accelerator into an internal mixing device for mixing, and discharging rubber to obtain a secondary rubber compound;
and S3, thinly passing the secondary rubber compound on an open mill, and discharging to obtain the cloth clamping diaphragm material for the air brake air chamber.
Preferably, in S1, the NR crude rubber and the BR crude rubber are put into an internal mixer to be plasticated according to the weight ratio, and then the reinforcing agent, the activator, the scorch retarder, the plasticizer and the antioxidant are put into the internal mixer to be mixed and discharged to obtain a primary rubber compound.
Preferably, in the process of feeding the NR raw rubber and the BR raw rubber, the feeding temperature is 45-55 ℃; the plastication time is 40-45 s.
Preferably, in S1, the mixing time is 450-550S; the temperature of the rubber discharge is 150-155 ℃.
Preferably, in S2, the feeding temperature is 58-62 ℃; the temperature of the rubber discharge is 100-105 ℃; the mixing time is 200-250 s.
Preferably, in S3, the secondary rubber compound is passed through an open mill 3 times and taken out to obtain the cloth sandwiched diaphragm material for air brake chambers.
The reinforcing agent is made of high wear-resistant carbon black, so that the strength of the rubber material is improved, the rubber material has excellent processability, and the fatigue resistance of the material can be improved.
The environment-friendly plasticizer should select aromatic oil with the pour point less than or equal to minus 40 ℃ to optimize the low temperature resistance of the material.
Preferably, the environment-friendly plasticizer can be selected from environment-friendly aromatic oil V500 in Han Dynasty of Germany.
The NR raw rubber is natural rubber, preferably the NR raw rubber with Mooney viscosity of 100 ℃ ML (1+4) of 55-65, ensures the strength of the material and simultaneously meets the requirement of good vulcanization molding process.
The BR crude rubber, namely butadiene rubber, is preferably high-quality BR crude rubber BR9000 with the Mooney viscosity of 100 ℃ ML (1+4) of 41-49, and the low-temperature and fatigue resistance performance of the material is optimized.
The scorch retarder is N-cyclohexyl thiophthalimide, namely the scorch retarder CTP, can improve the scorching performance of the rubber material and improve the processing safety.
The anti-aging agent is an ozone aging resistant p-phenylenediamine anti-aging agent IPPD and a heat aging resistant anti-aging agent TMQ, which can simultaneously take ozone aging resistance and heat aging resistance into consideration, and as for a specific example, the anti-aging agent can be commonly used in the field, and is not described again here.
The vulcanizing agent is sulfur, preferably easily dispersible masterbatch, and the accelerator is accelerator DM, which are commonly used in sulfur vulcanization systems, and specific examples thereof can be commonly used in the field, and are not described herein again.
In addition to the raw materials, other chemical raw materials commonly used in the field, such as processing aids and the like, can be properly added into the formula of the cloth-sandwiched diaphragm material for the air brake chamber.
According to the cloth clamping diaphragm material for the air brake air chamber, disclosed by the invention, NR raw rubber is specifically selected and used as the raw materials, BR raw rubber, a plasticizer, an active agent, an anti-aging agent, a reinforcing agent, an anti-scorching agent, a vulcanizing agent and an accelerant are used as the raw materials, the dosage of each raw material is optimized, so that the diaphragm material has high strength and high tear resistance and has excellent low temperature resistance and fatigue resistance, and the cloth clamping diaphragm material can be applied to the air brake air chamber to ensure that a driver can brake more timely and safely, and the durability is greatly improved, so that the localization process of the cloth clamping diaphragm for the air brake air chamber with international brands is accelerated, and the competitiveness of the matched high-end vehicle type similar products is improved; in the preparation method of the material, a mixing process of secondary mixing is adopted, and the primary mixing and rubber discharge temperature is high, so that the raw material with a higher melting point in the raw material and the packaging bag are fully melted and dispersed in the mixing process; the secondary mixing and rubber discharging temperature is low, so that the risk that the rubber scorching influences the product quality is reduced; and after fully mixing, thinly passing the mixture on an open mill for 3 times, and then discharging the mixture to ensure the dispersion uniformity of the rubber material.
The preparation method of the cloth-sandwiched diaphragm material for the air brake chamber is simple in process and mild in condition, and the cloth-sandwiched diaphragm material obtained by the method has high strength, high tear resistance and excellent fatigue resistance, and can keep good elasticity in a low-temperature environment, so that the cloth-sandwiched diaphragm works smoothly, and the braking is ensured to be sensitive and effective.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A cloth clamping membrane material for a pneumatic brake air chamber comprises the following raw materials in parts by mass: 60 parts of NR raw rubber, 40 parts of BR raw rubber, 10 parts of environment-friendly plasticizer, 5 parts of activator, 3 parts of anti-aging agent, 58 parts of high-wear-resistance carbon black, 0.3 part of anti-scorching agent, 3 parts of vulcanizing agent and 0.5 part of accelerator.
A preparation method of the cloth clamping membrane material for the air brake chamber comprises the following steps:
s1, first mixing: adjusting the temperature of an internal mixing chamber of an internal mixer to 50 ℃, and putting NR raw rubber and BR raw rubber into the internal mixing chamber for plastication; after plasticating for 45s, adding reinforcing agent high wear-resistant carbon black, an active agent, an environment-friendly plasticizer, an anti-aging agent and an anti-scorching agent into an internal mixing chamber, mixing for 450s after the feeding is finished, discharging rubber at 155 ℃, discharging sheets, cooling and storing to obtain primary rubber compound;
s2, second mixing: adjusting the temperature of an internal mixing chamber of an internal mixer to 60 ℃, adding a vulcanizing agent, an accelerator and the obtained primary rubber compound into the internal mixing chamber for mixing for 250s, and discharging rubber when the temperature reaches 105 ℃ to obtain a secondary rubber compound;
s3, open mixing: and after internal mixing is finished, thinly passing the secondary rubber compound for 3 times in an open mill, discharging, cooling and storing to obtain the cloth clamping membrane material for the air brake chamber.
Comparative example 1
A cloth clamping membrane material for a pneumatic brake air chamber comprises the following raw materials in parts by mass: 100 parts of NR raw rubber, 15 parts of environment-friendly plasticizer, 5 parts of activator, 3 parts of anti-aging agent, 58 parts of reinforcing agent fast extrusion carbon black, 3 parts of vulcanizing agent and 0.5 part of accelerator.
A preparation method of the cloth clamping membrane material for the air brake chamber comprises the following steps:
s1, first mixing: adjusting the temperature of an internal mixing chamber of an internal mixer to 45 ℃, and putting NR raw rubber into the internal mixing chamber for plastication; after plasticating for 35s, adding a reinforcing agent into the mixing chamber to quickly extrude carbon black, an active agent, an environment-friendly plasticizer and an anti-aging agent, mixing for 510s after the materials are added, discharging rubber at 140 ℃, discharging sheets, cooling and storing to obtain primary rubber compound;
s2, second mixing: adjusting the temperature of an internal mixing chamber to 55 ℃, adding a vulcanizing agent, an accelerator and the obtained primary rubber compound into the internal mixing chamber for mixing for 210s, and discharging rubber when the temperature reaches 100 ℃ to obtain a secondary rubber compound;
s3, open mixing: and after banburying is finished, thinly passing the secondary rubber compound for 3 times in an open mill, discharging, cooling and storing to obtain the cloth sandwiched membrane material.
Comparative example 2
A cloth clamping membrane material for a pneumatic brake air chamber comprises the following raw materials in parts by mass: 100 parts of NR raw rubber, 15 parts of environment-friendly plasticizer, 5 parts of activator, 3 parts of anti-aging agent, 58 parts of reinforcing agent fast extrusion carbon black and 3 parts of vulcanizing agent.
A preparation method of the cloth clamping membrane material for the air brake chamber comprises the following steps:
s1, first mixing: adjusting the temperature of an internal mixing chamber of an internal mixer to 65 ℃, and adding NR raw rubber into the internal mixing chamber for plastication; after plasticating for 55s, adding a reinforcing agent into the mixing chamber to quickly extrude carbon black, an active agent, an environment-friendly plasticizer and an anti-aging agent, mixing for 580s after the materials are added, discharging rubber at 160 ℃, discharging sheets, cooling and storing to obtain primary rubber compound;
s2, adjusting the temperature of an internal mixing chamber of an internal mixer to 55 ℃, adding a vulcanizing agent and the obtained primary rubber compound into the internal mixing chamber for mixing for 300S, discharging rubber when the temperature reaches 115 ℃, and discharging, cooling and storing.
In example 1 and comparative examples 1 to 2, the NR raw rubber had a Mooney viscosity of 55 at 100 ℃ ML (1+ 4); the BR crude rubber is butadiene rubber BR9000 with Mooney viscosity of 100 ℃ and ML (1+4) of 49; the environment-friendly plasticizer is an environment-friendly aromatic oil V500 from Hansheng of Germany; the active agent is active zinc oxide; the scorch retarder is N-cyclohexyl thiophthalimide; the anti-aging agent is a mixture of an anti-aging agent IPPD and an anti-aging agent TMQ; the vulcanizing agent is sulfur masterbatch, and the accelerator is accelerator DM.
The materials obtained in example 1 and comparative examples 1-2 were tested and the results are given in the following table:
as can be seen from the above table, the overall performance of example 1 is optimal; according to the invention, the NR raw rubber, BR raw rubber, high wear-resistant carbon black, an activator, an anti-aging agent, and a scorch retarder, a vulcanizing agent and an accelerator are used in cooperation, so that the material produced under the optimized process condition has the characteristics of high tear resistance, excellent fatigue resistance, good low-temperature resistance, long rubber scorching time, safe processing and storage and the like while ensuring high strength. The material is very suitable for producing a cloth clamping diaphragm product for a pneumatic brake air chamber. The finished product made of the cloth clamping diaphragm material for the air brake air chamber is subjected to assembly endurance test, and the experimental result shows that compared with the cloth clamping diaphragm made of the common material, the finished product is subjected to 100 ten thousand times of fatigue resistance test after high-temperature 80 ℃ and low-temperature-40 ℃ cyclic endurance test for 1440 hours, the air brake air chamber can normally work, the air inflation and exhaust processes are smooth, and the product with the cloth clamping diaphragm disassembled from the assembly is complete and has no damage. When the cloth clamping membrane made of common materials is subjected to the endurance test, the exhaust process of the air brake chamber is not smooth, the brake reaction speed is delayed, and when the test is not completely finished, the phenomenon of air leakage to different degrees already occurs, which has a direct relation with the low temperature resistance, the tear resistance and the fatigue endurance performance of the cloth clamping membrane material.
Example 2
A cloth clamping membrane material for a pneumatic brake air chamber comprises the following raw materials in parts by weight: 55 parts of NR raw rubber, 45 parts of BR raw rubber, 8 parts of plasticizer, 4 parts of active zinc oxide, 1 part of anti-aging agent IPPD, 1 part of anti-aging agent TMQ, 65 parts of high wear-resistant carbon black, 0.2 part of N-cyclohexyl thiophthalimide, 3.8 parts of sulfur master batch and 0.4 part of accelerator DM; wherein the NR raw rubber has a Mooney viscosity of 55 at 100 ℃ ML (1+ 4); the BR crude rubber is butadiene rubber BR9000 with Mooney viscosity of 100 ℃ and ML (1+4) of 49; the plasticizer is aromatic oil with a pour point of-40 ℃.
The invention also provides a preparation method of the cloth clamping diaphragm material for the air brake chamber, which comprises the following steps:
s1, putting NR raw rubber and BR raw rubber into an internal mixing device according to the weight ratio for plastication for 40S, then putting reinforcing agent high wear-resistant carbon black, active zinc oxide, N-cyclohexyl thiophthalimide, plasticizer, anti-aging agent IPPD and anti-aging agent TMQ, mixing for 450S, and discharging rubber to obtain primary rubber compound; wherein, in the process of adding the NR crude rubber and the BR crude rubber, the feeding temperature is 55 ℃; the temperature of the rubber discharge is 155 ℃;
s2, placing the primary rubber compound, the sulfur master batch particles and the accelerator DM into an internal mixing device for mixing for 200S, and discharging rubber to obtain a secondary rubber compound; wherein the feeding temperature is 58 ℃, and the glue discharging temperature is 105 ℃;
and S3, thinly passing the secondary rubber compound on an open mill, and discharging to obtain the cloth clamping diaphragm material for the air brake air chamber.
Example 3
A cloth clamping membrane material for a pneumatic brake air chamber comprises the following raw materials in parts by weight: 65 parts of NR raw rubber, 35 parts of BR raw rubber, 11 parts of plasticizer, 5.5 parts of active zinc oxide, 1 part of anti-aging agent IPPD, 0.5 part of anti-aging agent TMQ, 58 parts of high wear-resistant carbon black, 0.4 part of N-cyclohexyl thiophthalimide, 2 parts of sulfur master batch and 0.65 part of accelerator DM; wherein the NR raw rubber has a Mooney viscosity of 65 at 100 ℃ ML (1+ 4); the BR crude rubber is butadiene rubber BR9000 with Mooney viscosity of 100 ℃ and ML (1+4) of 41; the plasticizer is aromatic oil with a pour point of-45 ℃.
The invention also provides a preparation method of the cloth clamping diaphragm material for the air brake chamber, which comprises the following steps:
s1, putting NR raw rubber and BR raw rubber into an internal mixing device according to the weight ratio for plastication for 45S, then putting reinforcing agent high-wear-resistance carbon black, active zinc oxide as an active agent, anti-coking agent N-cyclohexyl thiophthalimide, plasticizer, anti-aging agent IPPD and anti-aging agent TMQ, mixing for 550S, and discharging rubber to obtain primary rubber compound; wherein, in the process of adding the NR crude rubber and the BR crude rubber, the feeding temperature is 50 ℃; the temperature of the rubber discharge is 150 ℃;
s2, placing the primary rubber compound, the sulfur master batch particles and the accelerator DM into an internal mixing device for mixing for 220S, and discharging rubber to obtain a secondary rubber compound; wherein the feeding temperature is 62 ℃; the temperature of the rubber discharge is 100 ℃;
and S3, thinly passing the secondary rubber compound on an open mill for 3 times, and discharging to obtain the cloth clamping diaphragm material for the air brake air chamber.
Example 4
A cloth clamping membrane material for a pneumatic brake air chamber comprises the following raw materials in parts by weight: 60 parts of NR raw rubber, 38 parts of BR raw rubber, 12 parts of plasticizer, 3 parts of active zinc oxide serving as activator, 4 parts of anti-aging agent, 55 parts of high-wear-resistance carbon black serving as reinforcing agent, 0.28 part of scorch retarder N-cyclohexyl thiophthalimide, 2.3 parts of vulcanizing agent sulfur masterbatch particles and 0.6 part of accelerator DM; wherein the NR raw rubber has a Mooney viscosity ML (1+4) at 100 ℃ of 60; the BR crude rubber is butadiene rubber BR9000 with Mooney viscosity of 100 ℃ and ML (1+4) of 47; the plasticizer is aromatic oil with a pour point of-55 ℃; the anti-aging agent is an anti-aging agent IPPD and an anti-aging agent TMQ in a weight ratio of 3: 1.
The invention also provides a preparation method of the cloth clamping diaphragm material for the air brake chamber, which comprises the following steps:
s1, putting NR raw rubber and BR raw rubber into an internal mixing device according to the weight ratio for plastication for 43S, then putting reinforcing agent high-wear-resistance carbon black, active zinc oxide serving as an active agent, anti-coking agent N-cyclohexyl thiophthalimide, plasticizer and anti-aging agent, mixing for 520S, and discharging rubber to obtain primary rubber compound; wherein, in the process of adding the NR crude rubber and the BR crude rubber, the feeding temperature is 45 ℃; the temperature of the rubber discharge is 152 ℃;
s2, placing the primary rubber compound, the sulfur master batch particles and the accelerator DM into an internal mixing device for mixing for 250S, and discharging rubber to obtain a secondary rubber compound; wherein the feeding temperature is 60 ℃; the temperature of the rubber discharge is 103 ℃;
and S3, thinly passing the secondary rubber compound on an open mill, and discharging to obtain the cloth clamping diaphragm material for the air brake air chamber.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A cloth clamping membrane material for a pneumatic brake air chamber is characterized by comprising the following raw materials in parts by weight: 55-65 parts of NR raw rubber, 35-45 parts of BR raw rubber, 8-13 parts of plasticizer, 3-5.5 parts of activator, 1.5-4 parts of anti-aging agent, 55-65 parts of reinforcing agent, 0.2-0.4 part of anti-scorching agent, 2-3.8 parts of vulcanizing agent and 0.4-0.65 part of accelerator.
2. A cloth sandwiched diaphragm material for an air brake chamber according to claim 1, which comprises the following raw materials in parts by weight: 60 parts of NR raw rubber, 40 parts of BR raw rubber, 10 parts of plasticizer, 5 parts of activator, 3 parts of anti-aging agent, 58 parts of reinforcing agent, 0.3 part of anti-scorching agent, 3 parts of vulcanizing agent and 0.5 part of accelerator.
3. The cloth sandwiching membrane material for a pneumatic brake air chamber according to claim 1 or 2, wherein the NR crude rubber has a mooney viscosity of 100 ℃ ML (1+4) of 55 to 65; the BR crude rubber is butadiene rubber BR9000 with Mooney viscosity of 100 ℃ and ML (1+4) of 41-49.
4. A cloth sandwiched diaphragm material for an air brake chamber according to claim 1 or 2, wherein said plasticizer is an environment-friendly plasticizer; preferably, the environment-friendly plasticizer is environment-friendly aromatic oil; preferably, the environment-friendly plasticizer is aromatic oil with the pour point less than or equal to minus 40 ℃.
5. A cloth sandwiching diaphragm material for air brake chambers according to claim 1 or 2, wherein said activator is activated zinc oxide; the reinforcing agent is high wear-resistant carbon black; the scorch retarder is N-cyclohexyl thiophthalimide; the anti-aging agent is a mixture of an anti-aging agent IPPD and an anti-aging agent TMQ.
6. The cloth sandwiched diaphragm material for air brake chambers according to claim 1 or 2, wherein said vulcanizing agent is sulfur, and said accelerator is accelerator DM; preferably, the vulcanizing agent is sulfur masterbatch.
7. A method for preparing a cloth sandwiched diaphragm material for an air brake chamber according to any one of claims 1 to 6, comprising the steps of:
s1, putting NR raw rubber, BR raw rubber, a plasticizer, an activator, an anti-aging agent, a reinforcing agent and an anti-scorching agent into a banburying device according to the weight ratio, mixing and discharging rubber to obtain primary rubber compound;
s2, placing the primary rubber compound, the vulcanizing agent and the accelerator into an internal mixing device for mixing, and discharging rubber to obtain a secondary rubber compound;
and S3, thinly passing the secondary rubber compound on an open mill, and discharging to obtain the cloth clamping diaphragm material for the air brake air chamber.
8. The method for preparing the cloth sandwiched membrane material for the air brake chamber of claim 7, wherein in S1, NR raw rubber and BR raw rubber are put into an internal mixing device according to the weight ratio for plastication, and then reinforcing agent, activator, anti-scorching agent, plasticizer and anti-aging agent are put into the internal mixing device for mixing and rubber removal to obtain a primary rubber compound; preferably, in the process of feeding the NR raw rubber and the BR raw rubber, the feeding temperature is 45-55 ℃; the plastication time is 40-45 s.
9. The method for preparing a cloth sandwiched membrane material for an air brake chamber as claimed in claim 7, wherein in S1, the mixing time is 450-; the temperature of the rubber discharge is 150-155 ℃.
10. The method for preparing a cloth sandwiched diaphragm material for a pneumatic brake air chamber according to any one of claims 7 to 9, wherein in S2, the feeding temperature is 58 to 62 ℃; the temperature of the rubber discharge is 100-105 ℃; the mixing time is 200-250 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110228959.0A CN113087974A (en) | 2021-03-02 | 2021-03-02 | Cloth clamping diaphragm material for air brake chamber and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110228959.0A CN113087974A (en) | 2021-03-02 | 2021-03-02 | Cloth clamping diaphragm material for air brake chamber and preparation method thereof |
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| CN113087974A true CN113087974A (en) | 2021-07-09 |
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| CN202110228959.0A Pending CN113087974A (en) | 2021-03-02 | 2021-03-02 | Cloth clamping diaphragm material for air brake chamber and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114479208A (en) * | 2022-02-15 | 2022-05-13 | 贵州大众橡胶有限公司 | Rubber diaphragm sizing material for automobile brake chamber and preparation method thereof |
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2021
- 2021-03-02 CN CN202110228959.0A patent/CN113087974A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114479208A (en) * | 2022-02-15 | 2022-05-13 | 贵州大众橡胶有限公司 | Rubber diaphragm sizing material for automobile brake chamber and preparation method thereof |
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Application publication date: 20210709 |