CN110643108A - Rubber tube material for automobile and preparation method of rubber tube - Google Patents
Rubber tube material for automobile and preparation method of rubber tube Download PDFInfo
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- CN110643108A CN110643108A CN201911044590.7A CN201911044590A CN110643108A CN 110643108 A CN110643108 A CN 110643108A CN 201911044590 A CN201911044590 A CN 201911044590A CN 110643108 A CN110643108 A CN 110643108A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a rubber tube material for an automobile and a preparation method of a rubber tube, wherein the material comprises the following raw materials in parts by weight: 55-65 parts of ethylene acrylate rubber, 5-10 parts of fluororubber, 20-30 parts of acrylate rubber, 5-10 parts of methyl vinyl silicone rubber, 2-3 parts of fluorosilicone rubber, 3-5 parts of polytetrafluoroethylene, 5-10 parts of aramid short fiber and 2-5 parts of polyimide short fiber. The hose prepared by blending the materials has good high temperature resistance, the use temperature range can reach-45 to +200 ℃, the hose has excellent high-temperature oil-gas permeation resistance, the high-temperature resistance, the tearing resistance and the negative pressure resistance of the hose can be obviously improved by adding the aramid fiber short fibers and the polyimide short fibers, the cracking, early breaking and hose flattening in the use process of the hose are effectively prevented, the oil-gas permeation leakage is effectively prevented, the service life of the hose is prolonged, and the hose can be used as a hose at a turbocharging air inlet end or an air outlet end of an air filter.
Description
Technical Field
The invention relates to the field of automobile rubber pipes, in particular to an automobile rubber pipe material and a preparation method of a rubber pipe.
Background
The use of exhaust gas turbocharger technology is a mainstream trend in the current development of the automotive industry in order to improve the efficiency of energy usage and meet increasingly stringent automotive emission standards.
The exhaust gas turbocharger technology is that exhaust gas is used for driving the turbocharger to compress fresh air filtered by an air filter at a high speed, the air input of an engine in unit time and space is improved, fuel oil is combusted more fully, compared with a traditional natural air suction engine with the same displacement, the output power can be effectively improved by about 40%, meanwhile, the air temperature is rapidly increased through turbocharging, and the maximum temperature of a heavy commercial vehicle can reach more than 250 ℃. In order to effectively control the emission of automobile exhaust gas in each automobile factory, the exhaust gas generated in the crank case must be separated by an oil-gas separator with a closed structure, but 20-50% of oil gas still returns to an engine air inlet system for circulation through a crank case pipeline, so that the automobile air inlet and cooling system pipeline contains a large amount of oil gas components. Thus, the turbocharger air inlet rubber pipe is required to have excellent permeability resistance, high temperature resistance, oil resistance and high temperature tearing resistance.
Meanwhile, the problems of wire aging, pipeline oil leakage, traffic accident impact and the like can occur in the using process of the automobile, so that the automobile combustion accident can be caused; in order to effectively avoid the occurrence of automobile spontaneous combustion accidents, various automobile factories put forward flame retardant requirements on non-metallic materials for automobiles. If the nonmetal pipelines in the automobile fluid pipelines, particularly various rubber hoses, can reach the standard of more than US UL 94V-1, the combustion can be delayed under special conditions, and powerful guarantee is provided for rescuing lives in time. At present, the rubber tube at the air inlet end of the turbocharger or the rubber tube at the air outlet end of the air filter in China mainly adopts materials such as ethylene-acrylate rubber (AEM), acrylate rubber (ACM) or chlorohydrin rubber (ECO) and the like, and has no requirement on flame retardant property and reaches related flame retardant standards.
Disclosure of Invention
The invention provides a rubber tube material for an automobile and a preparation method of the rubber tube, which have excellent flame retardance and low permeability, and have excellent high-temperature resistance and high tear resistance.
The technical scheme adopted by the invention is that the rubber tube material for the automobile comprises the following raw materials in parts by weight: 55-65 parts of ethylene acrylate rubber (AEM), 5-10 parts of Fluororubber (FPM), 20-30 parts of acrylate rubber (ACM), 5-10 parts of methyl vinyl silicone rubber (VMQ), 2-3 parts of fluorosilicone rubber (FVMQ), 3-5 parts of Polytetrafluoroethylene (PTFE), 5-10 parts of aramid short fiber and 2-5 parts of polyimide short fiber.
Further, the raw materials also comprise 1-2 parts of vulcanizing agent, 3-5 parts of vulcanizing aid, 30-38 parts of plasticizer, 28-46 parts of reinforcing agent, 21-38 parts of flame retardant and 2-4 parts of acid acceptor. The vulcanizing agent is filled into a low-melting plastic bag and added together.
Furthermore, the vulcanizing agent is a peroxide vulcanizing agent, so that the pressure deformation strength of the vulcanized product is improved, and the high temperature resistance is enhanced; the vulcanization auxiliary agent is TAIC, so that the crosslinking density of the product is increased, and meanwhile, the early vulcanization can be prevented; the plasticizer is TOTM25-30 parts and palm wax 5-8 parts, and improves the sulfur mobility.
Furthermore, the reinforcing agent comprises 20-30 parts of N550 carbon black, 5-10 parts of N990 carbon black and 3-6 parts of fumed silica, so that the comprehensive reinforcing performance is improved.
Furthermore, the flame retardant is 5-9 parts of antimony trioxide, 10-15 parts of zinc borate, 3-8 parts of aluminum hydroxide and 3-6 parts of phosphate ester, and a synergistic flame retardant effect is generated by matching various flame retardants to meet the requirements; the acid absorbent is MgO, absorbs acid substances and improves the vulcanization efficiency.
The invention also relates to a method for preparing the rubber hose material, which comprises the following steps:
1) weighing raw materials according to the proportion, mixing to obtain mixed rubber, standing and standing for uniform dispersion;
2) extruding the rubber compound obtained in the step 1) through a preforming machine, cutting the rubber compound and a rotary blade of a machine head into cylinders with calibrated weight, cooling, and storing in a container for later use in an isolated manner;
3) heating the cylinder obtained in the step 2) at 50-70 ℃ for 10-20 min; then putting the mixture into a rubber injection cylinder of a rubber injection machine with upper and lower hot plates provided with product molds, and extruding the rubber material into a product mold cavity by the injection machine for vulcanization; and after vulcanization is finished, the mold can be pulled out and the rubber edges are removed, and finally secondary vulcanization is carried out to obtain the finished product of the automobile rubber tube.
Further, an open mill or an internal mixer is adopted during mixing in the step 1), and the standing time is more than 16 h.
Further, the thickness of the sheet pressed in the step 2) is 5-6mm, a rubber calender is adopted for pressing, and a cooling machine is used for cooling.
Further, when the first vulcanization is carried out in the step 3), closing the upper and lower hot plates of the rubber machine, slowly pressing and exhausting for 3-4 times, wherein the vulcanization temperature is 175 +/-5 ℃, and the vulcanization time is 360 +/-20S.
Further, in the secondary vulcanization in the step 3), the vulcanization temperature is 170 +/-5 ℃ and the vulcanization time is 3 hours.
1. The blending material is prepared from ethylene acrylate rubber (AEM), Fluororubber (FPM), acrylate rubber (ACM), methyl vinyl silicone rubber (VMQ), fluorosilicone rubber (FVMQ), Polytetrafluoroethylene (PTFE), aramid short fiber and polyimide short fiber, and by adding materials with excellent high and low temperature resistance, such as VMQ, FPM and FVMQ, compared with single ethylene acrylate rubber (AEM) or single acrylate rubber (ACM), the oil resistance can be improved by more than 20 percent, the low temperature resistance can reach-45 ℃, the blending material has more excellent high temperature resistance, the use temperature can reach 200 ℃, and the blending material is far superior to the use temperature range of 170 ℃ of the ethylene acrylate rubber (AEM) or the acrylate rubber (ACM); the high temperature resistance of the blending material is improved, the volatile matter of the material can be effectively reduced, the small molecular acidic volatile matter such as HF and HCl under the high temperature condition of the rubber tube can be reduced to a certain extent, and the influence on the environment is reduced. By adding VMQ, FPM and FVMQ, the product can be used at 200 deg.C for a long period of time. The compactness performance of the rubber tube after C-F bond crosslinking in molecular structures of Fluororubber (FPM), fluorosilicone rubber (FVMQ) and Polytetrafluoroethylene (PTFE) is excellent, the high-temperature oil-gas permeation resistance of the rubber tube can be greatly improved after the Fluororubber (FPM), fluorosilicone rubber (FVMQ) and Polytetrafluoroethylene (PTFE) are added, and the influence of oil-gas permeation in an automobile pipeline on the environment can be effectively avoided. The aramid short fiber and the polyimide fiber form a cross sea-island structure with rubber, so that the high-temperature tearing resistance of the rubber tube is obviously improved, the rubber tube is effectively prevented from being damaged in the early stage in the using process, and the driving safety of a vehicle is greatly improved; effectively prevent oil gas leakage and prolong the service life of the rubber pipe.
2. By adding flame retardants such as antimony trioxide, zinc borate, aluminum hydroxide and phosphate ester and the like and adding outstanding flame retardancy of Fluororubber (FPM) fluorosilicone rubber (FVMQ), aramid fiber and polyimide fiber, the blending material has excellent flame retardancy and can reach V-1 grade and above standards in UL 94.
3. The production process of the rubber tube can adopt an automatic control injection vulcanization process, and compared with the traditional extrusion molding process, the production process has the characteristics of stable size of a molded product, good consistency, simple process flow, low cost, small environmental pollution and the like.
Detailed Description
The invention is further illustrated by the following examples, but the scope of the invention as claimed is not limited to the scope of the examples.
Example 1:
the rubber hose material for the automobile comprises the following raw materials: 22Kg of ethylene acrylate rubber, 4Kg of fluororubber, 12Kg of acrylate rubber, 2Kg of methyl vinyl silicone rubber (VMQ), 1.2Kg of fluorosilicone rubber, 2Kg of polytetrafluoroethylene, 2Kg of aramid short fiber and 0.8Kg of polyimide short fiber, 0.8Kg of peroxide vulcanizing agent, 1.6Kg of TAIC vulcanizing aid, 10Kg of TOTM plasticizer, 8Kg of N550 carbon black, 2Kg of N990 carbon black, 1.6Kg of MgO, 2.4Kg of palm wax, 3.2Kg of antimony trioxide, 6Kg of 3.5 water zinc borate, 2.8Kg of aluminum hydroxide, 2Kg of phosphate ester and 1.2Kg of white carbon black by gas phase method.
Example 2:
the rubber tube material for the automobile comprises the following raw materials: 26Kg of ethylene acrylate rubber, 2Kg of fluororubber, 8Kg of acrylate rubber, 4Kg of methyl vinyl silicone rubber (VMQ), 0.8Kg of fluorosilicone rubber, 1.2Kg of polytetrafluoroethylene, 4Kg of aramid short fiber and 2Kg of polyimide short fiber, 0.4Kg of peroxide vulcanizing agent, 1.2Kg of TAIC vulcanizing aid, 11.2Kg of TOTM plasticizer, 12Kg of N550 carbon black, 3.2Kg of N990 carbon black, 0.8Kg of MgO, 3.2Kg of carnauba wax, 3.6Kg of antimony trioxide, 4Kg of zinc borate, 1.2Kg of aluminum hydroxide, 1.2Kg of phosphate and 2.4Kg of fumed silica.
Example 3:
the rubber hose material for the automobile comprises the following raw materials: 24Kg of ethylene acrylate rubber, 2Kg of fluororubber, 10Kg of acrylate rubber, 3.2Kg of methyl vinyl silicone rubber (VMQ), 1Kg of fluorosilicone rubber, 1.6Kg of polytetrafluoroethylene, 3.2Kg of aramid short fiber, 1.2Kg of polyimide short fiber, 0.6Kg of peroxide vulcanizing agent, 1.6Kg of TAIC vulcanizing aid, 10.4Kg of TOTM plasticizer, 10Kg of N550 carbon black, 3.2Kg of N990 carbon black, 1.2Kg of MgO1, 2.4Kg of palm wax, 2.8Kg of antimony trioxide, 4.8Kg of zinc borate, 2.4Kg of aluminum hydroxide, 2Kg of phosphate ester and 2Kg of fumed silica.
Comparative example 1:
the rubber hose material for the automobile comprises the following raw materials: 24Kg of ethylene acrylate rubber, 2Kg of fluororubber, 10Kg of acrylate rubber, 3.2Kg of methyl vinyl silicone rubber (VMQ), 1Kg of fluorosilicone rubber, 1.6Kg of polytetrafluoroethylene, 0.6Kg of peroxide curing agent, 1.6Kg of TAIC curing assistant, 10.4Kg of TOTM plasticizer, 10Kg of N550 carbon black, 3.2Kg of N990 carbon black, 1.2Kg of MgO1, 2.4Kg of palm wax, 2.8Kg of antimony trioxide, 4.8Kg of zinc borate, 2.4Kg of aluminum hydroxide, 2Kg of phosphate ester and 2Kg of fumed silica.
Comparative example 2:
the rubber tube material for the automobile comprises the following raw materials in parts by weight (Kg): 30Kg of ethylene acrylate rubber, 2.5Kg of fluororubber, 12.5Kg of acrylate rubber, 4Kg of methyl vinyl silicone rubber (VMQ), 1.25Kg of fluorosilicone rubber, 2Kg of polytetrafluoroethylene, 4Kg of aramid short fiber, 0.75Kg of peroxide vulcanizing agent, 2Kg of TAIC vulcanizing assistant, 13Kg of TOTM plasticizer, 12.5Kg of N550 carbon black, 4Kg of N990 carbon black, 1.5Kg of MgO, 3Kg of palm wax and 2.5Kg of fumed silica.
When the materials in the embodiments and the comparative examples are used for preparing the automobile rubber hose, the concrete steps are as follows:
1. the components are respectively weighed according to the weight of the process formula, and are respectively mixed on an open mill or in an internal mixer to be processed into rubber compound. The mixed rubber needs to be parked for not less than 16 hours so that the compounding ingredients are fully and uniformly dispersed.
2. And pressing the mixed rubber which is uniformly placed and dispersed into a 5-6mm sheet shape by a three-roller rubber calender, cooling by an 8-roller cooling machine, isolating by using a PP film and coiling.
3. And extruding the rolled rubber sheet into a solid columnar semi-finished product by using a rubber pre-forming machine.
4. Preheating the solid columnar semi-finished product at 100 ℃ for 10-20 min.
5. And putting the preheated solid columnar semi-finished product into a rubber injection cylinder of a rubber injection press, wherein upper and lower hot plates are provided with product molds.
6. Closing the upper and lower hot plates of the rubber machine, slowly pressing and exhausting for 3-4 times, wherein the vulcanization temperature is 175 +/-5 ℃, and the vulcanization time is 360 +/-20 seconds.
7. And opening the upper and lower hot plates of the glue injection machine, pulling the vulcanized rubber tube off the core rod of the mold, and removing the small rubber edges.
8. And (3) putting the product subjected to the appearance inspection into a hot air oven or a vulcanization drying tunnel for secondary vulcanization at the temperature of 170 +/-5 ℃ for 3 hours, and taking out to obtain a finished product.
The properties of the products obtained in the above examples and comparative examples are shown in Table 1 below.
TABLE 1
Claims (10)
1. The rubber tube material for the automobile is characterized by comprising the following raw materials in parts by weight: 55-65 parts of ethylene acrylate rubber, 5-10 parts of fluororubber, 20-30 parts of acrylate rubber, 5-10 parts of methyl vinyl silicone rubber, 2-3 parts of fluorosilicone rubber, 3-5 parts of polytetrafluoroethylene, 5-10 parts of aramid short fiber and 2-5 parts of polyimide short fiber.
2. The hose material according to claim 1, wherein: the raw materials also comprise 1-2 parts of vulcanizing agent, 3-5 parts of vulcanizing assistant, 30-38 parts of plasticizer, 28-46 parts of reinforcing agent, 21-38 parts of flame retardant and 2-4 parts of acid acceptor.
3. The hose material according to claim 2, wherein: the vulcanizing agent is a peroxide vulcanizing agent, the vulcanizing assistant is TAIC, and the plasticizer is TOTM25-30 parts and palm wax 5-8 parts.
4. The hose material according to claim 2, wherein: the reinforcing agent comprises 20-30 parts of N550 carbon black, 5-10 parts of N990 carbon black and 3-6 parts of fumed silica.
5. The hose material according to claim 2, wherein: the flame retardant is 5-9 parts of antimony trioxide, 10-15 parts of zinc borate, 3-8 parts of aluminum hydroxide and 3-6 parts of phosphate; the acid acceptor is MgO.
6. A method of making the hose material of any one of claims 1-4, comprising the steps of:
1) weighing raw materials according to the proportion, mixing to obtain mixed rubber, standing and standing for uniform dispersion;
2) extruding the rubber compound obtained in the step 1) through a preforming machine, cutting the rubber compound and a rotary blade of a machine head into cylinders with calibrated weight, cooling, and storing in a container for later use in an isolated manner;
3) heating the cylinder obtained in the step 2) at 50-70 ℃ for 10-20 min; then putting the mixture into a rubber injection cylinder of a rubber injection machine with upper and lower hot plates provided with product molds, and extruding the rubber material into a product mold cavity by the injection machine for vulcanization; and after vulcanization is finished, the mold can be pulled out and the rubber edges are removed, and finally secondary vulcanization is carried out to obtain the finished product of the automobile rubber tube.
7. The method of claim 6, wherein: in the step 1), an open mill or an internal mixer is adopted during mixing, and the standing time is more than 16 h.
8. The method of claim 6, wherein: the thickness of the sheet pressed in the step 2) is 5-6mm, a rubber calender is adopted for pressing, and a cooling machine is used for cooling.
9. The method of claim 6, wherein: closing the upper and lower hot plates of the rubber machine during the first vulcanization in the step 3), slowly pressing and exhausting for 3-4 times, wherein the vulcanization temperature is 175 +/-5 ℃, and the vulcanization time is 360 +/-20 seconds.
10. The method of claim 6, wherein: and 3) during secondary vulcanization in the step 3), the vulcanization temperature is 170 +/-5 ℃, and the vulcanization time is 3 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911044590.7A CN110643108A (en) | 2019-10-30 | 2019-10-30 | Rubber tube material for automobile and preparation method of rubber tube |
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| CN201911044590.7A CN110643108A (en) | 2019-10-30 | 2019-10-30 | Rubber tube material for automobile and preparation method of rubber tube |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112812412A (en) * | 2020-12-30 | 2021-05-18 | 北京天元奥特橡塑有限公司 | EVM, ACM, AEM and CM blended composite rubber tube and preparation method thereof |
| CN115895145A (en) * | 2022-11-29 | 2023-04-04 | 芜湖集拓橡胶技术有限公司 | Low-pollution and fuel-resistant oil filler sheath formula |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084285A (en) * | 2017-04-10 | 2017-08-22 | 山东美晨科技股份有限公司 | A kind of ethylene-acrylate rubber turbine pressurized hose and preparation method thereof |
-
2019
- 2019-10-30 CN CN201911044590.7A patent/CN110643108A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084285A (en) * | 2017-04-10 | 2017-08-22 | 山东美晨科技股份有限公司 | A kind of ethylene-acrylate rubber turbine pressurized hose and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112812412A (en) * | 2020-12-30 | 2021-05-18 | 北京天元奥特橡塑有限公司 | EVM, ACM, AEM and CM blended composite rubber tube and preparation method thereof |
| CN115895145A (en) * | 2022-11-29 | 2023-04-04 | 芜湖集拓橡胶技术有限公司 | Low-pollution and fuel-resistant oil filler sheath formula |
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Application publication date: 20200103 |