CN114571697A - Preparation method of oil-resistant rubber hose with good tear resistance - Google Patents
Preparation method of oil-resistant rubber hose with good tear resistance Download PDFInfo
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- CN114571697A CN114571697A CN202210239396.XA CN202210239396A CN114571697A CN 114571697 A CN114571697 A CN 114571697A CN 202210239396 A CN202210239396 A CN 202210239396A CN 114571697 A CN114571697 A CN 114571697A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 136
- 239000005060 rubber Substances 0.000 title claims abstract description 136
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 238000004073 vulcanization Methods 0.000 claims abstract description 19
- 239000004014 plasticizer Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 239000003365 glass fiber Substances 0.000 claims abstract description 8
- 229920000728 polyester Polymers 0.000 claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000010074 rubber mixing Methods 0.000 claims abstract description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 238000009941 weaving Methods 0.000 claims description 17
- 229920000459 Nitrile rubber Polymers 0.000 claims description 10
- 239000005662 Paraffin oil Substances 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000292 calcium oxide Substances 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 239000006229 carbon black Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 10
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 10
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 10
- 239000008117 stearic acid Substances 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 10
- 125000003473 lipid group Chemical group 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 238000005809 transesterification reaction Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000009940 knitting Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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Classifications
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L11/00—Compositions of homopolymers or copolymers of chloroprene
-
- 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
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a preparation method of an oil-resistant rubber pipe with good tear resistance, which comprises the following steps: 1) raw material preparation, 2) mixing and rubber mixing, 3) extrusion molding and 4) vulcanization molding. According to the preparation method of the oil-resistant rubber pipe with good tear resistance, a vulcanizing system of a vulcanizing agent and an accelerator is adopted, and the ratio is reasonably adjusted, so that the mechanical property of the rubber pipe is optimal, and the high-pressure resistance is enhanced; the plasticizer and the anti-aging agent are adopted, so that the oil resistance, the flexibility resistance, the high temperature resistance and the heat-resistant stability of the rubber tube are improved, and the problems that the rubber tube is easy to age, the elasticity is poor, and the strength and the sealing performance are reduced are solved; the glass fiber yarns and the polyester yarns are used as the toughening layers, so that the rubber tube has high wear resistance and toughness, the tear resistance of the rubber tube is effectively improved, and the service life of the rubber tube is prolonged. Meanwhile, the process is simple to set and easy to operate, and has the advantage of environmental friendliness.
Description
Technical Field
The invention relates to the technical field of rubber tube preparation, in particular to a preparation method of an oil-resistant rubber tube with good tear resistance.
Background
Rubber hoses are used for conveying tubular rubber products of the type used for conveying gaseous, liquid, pasty or granular materials. The rubber tube consists of an inner rubber layer, an outer rubber layer and a toughening layer, wherein the toughening layer can be made of cotton fibers, various synthetic fibers, carbon fibers or asbestos, steel wires and the like, and the inner rubber layer and the outer rubber layer of a common rubber tube are made of natural rubber, styrene butadiene rubber or butadiene rubber.
However, the oil-resistant rubber tube adopted in the existing engineering machinery heats oil liquid due to power loss of a hydraulic system when the engineering machinery works, and due to the influence of the outside air temperature, the oil temperature can be rapidly increased, the higher the oil liquid use temperature is, the more the rubber is easy to age, the lower the elasticity is, the strength and the sealing performance are reduced, and the rubber tube can burst rapidly, so that the use effect is influenced. Therefore, a novel preparation method of the oil-resistant rubber hose with good tear resistance is provided.
Disclosure of Invention
The invention mainly aims to provide a preparation method of an oil-resistant rubber pipe with good tear resistance, which can effectively solve the problems in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of an oil-resistant rubber hose with good tear resistance comprises the following steps:
1) preparing raw materials: 40-65 parts of chloroprene rubber, 35-50 parts of nitrile rubber, 50-60 parts of N550 carbon black, 10-15 parts of dioctyl sebacate, 0.5-1.5 parts of a transesterification catalyst, 3-7 parts of zinc oxide, 3-10 parts of calcium oxide, 0.8 part of stearic acid, 4-8 parts of a plasticizer, 2-5 parts of an anti-aging agent, 1-3 parts of an accelerator and 3-6 parts of a vulcanizing agent;
2) mixing and refining: firstly, adding N550 carbon black, dioctyl sebacate and a lipid exchange catalyst into a rubber barrel of a double-roller rubber mixing mill for one time, uniformly stirring for 5-10min, then adding chloroprene rubber and nitrile rubber, continuously stirring for 15-30min, then sequentially adding zinc oxide, calcium oxide, stearic acid, a plasticizer and an anti-aging agent, continuously stirring for 3-5min, finally sequentially adding an accelerator and a vulcanizing agent, and stirring for 10-15min to obtain a finished product rubber material;
3) and (3) extrusion molding: extruding and molding the finished rubber material by a first screw extruder to prepare an inner rubber tube, winding and weaving the toughening layer on the surface of the inner rubber tube by a weaving machine, and finally coating the outer rubber tube on the surface of the inner rubber tube by a second screw extruder to prepare an oil-resistant rubber tube with good tear resistance;
4) and (3) vulcanization and shaping: and placing the prepared oil-resistant rubber tube with good tear resistance of the initial finished product in a vulcanizing tank for vulcanization molding, controlling the temperature in the vulcanizing tank to be 140-180 ℃, and vulcanizing for 45-75min to prepare the oil-resistant rubber tube with good tear resistance of the final finished product, taking out the oil-resistant rubber tube with good tear resistance of the final finished product, trimming burrs, and naturally cooling to obtain the finished product.
As a further description of the above technical solution, the toughening layer is disposed between the inner rubber tube and the outer rubber tube, and the inner rubber tube and the outer rubber tube comprise the same raw materials.
As a further description of the above technical solution, the toughening layer is woven by using glass fiber yarns and polyester yarns.
As a further description of the above technical solution, the knitting method of the toughening layer includes at least one of plain knitting, lock knitting, and winding.
As a further description of the above technical solution, the oil-resistant rubber hose needs to be kept still for 30 hours at a constant temperature after vulcanization.
As further description of the technical scheme, the plasticizer in the raw material of the inner rubber tube is paraffin oil, and the molecular weight of Ca in the paraffin oil is 7-9%.
As further described in the technical scheme, the discharging speed of the extruder ranges from 0KG/h to 500 KG/h.
Compared with the prior art, the invention has the following beneficial effects: by adopting a vulcanizing system of a vulcanizing agent and an accelerant and reasonably adjusting the proportion, the mechanical property of the rubber tube is optimal, and the high-pressure resistance is enhanced; the plasticizer and the anti-aging agent are adopted, so that the oil resistance, the flexibility resistance, the high temperature resistance and the heat-resistant stability of the rubber tube are improved, and the problems that the rubber tube is easy to age, the elasticity is poor, and the strength and the sealing performance are reduced are solved; the glass fiber yarns and the polyester yarns are used as the toughening layers, so that the rubber tube has high wear resistance and toughness, the tear resistance of the rubber tube is effectively improved, and the service life of the rubber tube is prolonged. Meanwhile, the process is simple in arrangement and easy to operate, and has the advantage of being environment-friendly.
Drawings
Fig. 1 is a main flow schematic diagram of a preparation method of an oil-resistant rubber hose with good tear resistance.
Detailed Description
In order to make the technical means, the creation characteristics and the achievement purposes of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, the present invention provides a technical solution: a preparation method of an oil-resistant rubber hose with good tear resistance comprises the following steps:
1) preparing raw materials: 45 parts of chloroprene rubber, 50 parts of nitrile rubber, 55 parts of N550 carbon black, 12 parts of dioctyl sebacate, 0.8 part of a lipid exchange catalyst, 5 parts of zinc oxide, 6 parts of calcium oxide, 0.8 part of stearic acid, 7 parts of a plasticizer, 3 parts of an anti-aging agent, 2.5 parts of an accelerator and 5 parts of a vulcanizing agent;
2) mixing and refining: firstly, adding N550 carbon black, dioctyl sebacate and a lipid exchange catalyst into a rubber barrel of a double-roller rubber mixing mill for one time, uniformly stirring for 8min, then adding chloroprene rubber and nitrile rubber, continuously stirring for 20min, then sequentially adding zinc oxide, calcium oxide, stearic acid, a plasticizer and an anti-aging agent, continuously stirring for 3min, finally sequentially adding an accelerator and a vulcanizing agent, and stirring for 15min to obtain a finished product rubber material;
3) and (3) extrusion molding: extruding and molding the finished rubber material by a first screw extruder to prepare an inner rubber tube, winding and weaving the toughening layer on the surface of the inner rubber tube by a weaving machine, and finally coating the outer rubber tube on the surface of the inner rubber tube by a second screw extruder to prepare an oil-resistant rubber tube with good tear resistance;
4) and (3) vulcanization and shaping: and placing the prepared oil-resistant rubber tube with good tear resistance of the primary finished product in a vulcanizing tank for vulcanization molding, controlling the temperature in the vulcanizing tank to be 150 ℃ and the vulcanization time to be 55min to prepare the oil-resistant rubber tube with good tear resistance of the final finished product, taking out the oil-resistant rubber tube with good tear resistance of the final finished product, trimming burrs, and naturally cooling to obtain the finished product.
The toughening layer is arranged between the inner rubber tube and the outer rubber tube, and the inner rubber tube and the outer rubber tube comprise the same raw materials. The toughening layer is obtained by weaving glass fiber yarns and polyester yarns. The weaving method of the toughening layer comprises plain knitting and winding. And standing the oil-resistant rubber tube for 30 hours at a constant temperature after vulcanization. The plasticizer in the raw material of the inner rubber tube is paraffin oil, and the molecular weight of Ca in the paraffin oil is 7.5%. The discharge speed of the extruder ranged from 300 KG/h.
Example 2:
referring to fig. 1, the present invention provides a technical solution: a preparation method of an oil-resistant rubber hose with good tear resistance comprises the following steps:
1) preparing raw materials: 60 parts of chloroprene rubber, 45 parts of nitrile rubber, 60 parts of N550 carbon black, 15 parts of dioctyl sebacate, 0.6 part of a lipid exchange catalyst, 7 parts of zinc oxide, 4 parts of calcium oxide, 0.8 part of stearic acid, 5 parts of a plasticizer, 4 parts of an anti-aging agent, 3 parts of an accelerator and 6 parts of a vulcanizing agent;
2) mixing and refining: firstly, adding N550 carbon black, dioctyl sebacate and a lipid exchange catalyst into a rubber barrel of a double-roller rubber mixing mill for one time, uniformly stirring for 6min, then adding chloroprene rubber and nitrile rubber, continuously stirring for 25min, then sequentially adding zinc oxide, calcium oxide, stearic acid, a plasticizer and an anti-aging agent, continuously stirring for 5min, finally sequentially adding an accelerator and a vulcanizing agent, and stirring for 12min to obtain a finished product rubber material;
3) and (3) extrusion molding: extruding and molding the finished rubber material by a first screw extruder to prepare an inner rubber tube, winding and weaving the toughening layer on the surface of the inner rubber tube by a weaving machine, and finally coating the outer rubber tube on the surface of the inner rubber tube by a second screw extruder to prepare an oil-resistant rubber tube with good tear resistance;
4) and (3) vulcanization and shaping: and placing the prepared oil-resistant rubber tube with good tear resistance of the primary finished product in a vulcanizing tank for vulcanization molding, controlling the temperature in the vulcanizing tank to be 165 ℃ and the vulcanization time to be 60min to prepare the oil-resistant rubber tube with good tear resistance of the final finished product, taking out the oil-resistant rubber tube with good tear resistance of the final finished product, trimming burrs, and naturally cooling to obtain the finished product.
The inner rubber tube and the outer rubber tube are made of the same raw material components, the toughening layer is woven by glass fiber yarns and polyester threads, the weaving method is winding weaving, and the toughening layer is arranged between the inner rubber tube and the outer rubber tube.
And standing the oil-resistant rubber tube for 30 hours at a constant temperature after vulcanization.
The plasticizer in the raw material of the inner rubber tube is paraffin oil, and the molecular weight of Ca in the paraffin oil is 8%. The discharge speed of the extruder ranged from 450 KG/h.
Example 3:
referring to fig. 1, the present invention provides a technical solution: a preparation method of an oil-resistant rubber hose with good tear resistance comprises the following steps:
1) preparing raw materials: 50 parts of chloroprene rubber, 42 parts of nitrile rubber, 58 parts of N550 carbon black, 13 parts of dioctyl sebacate, 1.2 parts of a lipid exchange catalyst, 5.5 parts of zinc oxide, 8 parts of calcium oxide, 0.8 part of stearic acid, 5.5 parts of a plasticizer, 5 parts of an anti-aging agent, 2 parts of an accelerator and 5 parts of a vulcanizing agent;
2) mixing and refining: firstly, adding N550 carbon black, dioctyl sebacate and a lipid exchange catalyst into a rubber barrel of a double-roller rubber mixing mill for one time, uniformly stirring for 7min, then adding chloroprene rubber and nitrile rubber, continuously stirring for 28min, then sequentially adding zinc oxide, calcium oxide, stearic acid, a plasticizer and an anti-aging agent, continuously stirring for 4min, finally sequentially adding an accelerator and a vulcanizing agent, and stirring for 13min to obtain a finished product rubber material;
3) and (3) extrusion molding: extruding and molding the finished rubber material by a first screw extruder to prepare an inner rubber tube, winding and weaving the toughening layer on the surface of the inner rubber tube by a weaving machine, and finally coating the outer rubber tube on the surface of the inner rubber tube by a second screw extruder to prepare an oil-resistant rubber tube with good tear resistance;
4) and (3) vulcanization and shaping: and placing the prepared oil-resistant rubber tube with good tear resistance of the primary finished product in a vulcanizing tank for vulcanization molding, controlling the temperature in the vulcanizing tank to be 170 ℃ and the vulcanization time to be 65min to prepare the oil-resistant rubber tube with good tear resistance of the final finished product, taking out the oil-resistant rubber tube with good tear resistance of the final finished product, trimming burrs, and naturally cooling to obtain the finished product.
The components of the inner rubber tube and the outer rubber tube are the same, the plasticizer in the raw material of the inner rubber tube is paraffin oil, the molecular weight of Ca in the paraffin oil is 9%, the discharging speed range of the extruder is 400KG/h, and when the oil-resistant rubber tube is vulcanized, the oil-resistant rubber tube needs to be kept still for 30h at a constant temperature.
The toughening layer is arranged between the inner rubber tube and the outer rubber tube and is woven by glass fiber yarns and polyester threads, and the weaving method is to use locking needles and winding in a mixed manner.
The invention relates to a preparation method of an oil-resistant rubber tube with good tear resistance, which adopts a vulcanization system of a vulcanizing agent and an accelerator, and reasonably adjusts the proportion to ensure that the mechanical property of the rubber tube is optimal and the high-pressure resistance is enhanced; the plasticizer and the anti-aging agent are adopted, so that the oil resistance, the flexibility resistance, the high temperature resistance and the heat resistance stability of the rubber tube are improved, and the problems that the rubber tube is easy to age, the elasticity is poor, and the strength and the sealing performance are reduced are solved; the glass fiber yarns and the polyester yarns are used as the toughening layers, so that the rubber tube has high wear resistance and toughness, the tear resistance of the rubber tube is effectively improved, and the service life of the rubber tube is prolonged. Meanwhile, the process is simple in arrangement and easy to operate, and has the advantage of being environment-friendly.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The preparation method of the oil-resistant rubber pipe with good tear resistance is characterized by comprising the following steps:
preparing raw materials: 40-65 parts of chloroprene rubber, 35-50 parts of nitrile rubber, 50-60 parts of N550 carbon black, 10-15 parts of dioctyl sebacate, 0.5-1.5 parts of a transesterification catalyst, 3-7 parts of zinc oxide, 3-10 parts of calcium oxide, 0.8 part of stearic acid, 4-8 parts of a plasticizer, 2-5 parts of an anti-aging agent, 1-3 parts of an accelerator and 3-6 parts of a vulcanizing agent;
mixing and refining: firstly, adding N550 carbon black, dioctyl sebacate and a lipid exchange catalyst into a rubber barrel of a double-roller rubber mixing mill for one time, uniformly stirring for 5-10min, then adding chloroprene rubber and nitrile rubber, continuously stirring for 15-30min, then sequentially adding zinc oxide, calcium oxide, stearic acid, a plasticizer and an anti-aging agent, continuously stirring for 3-5min, finally sequentially adding an accelerator and a vulcanizing agent, and stirring for 10-15min to obtain a finished product rubber material;
and (3) extrusion molding: extruding and molding the finished rubber material by a first screw extruder to prepare an inner rubber tube, winding and weaving the toughening layer on the surface of the inner rubber tube by a weaving machine, and finally coating the outer rubber tube on the surface of the inner rubber tube by a second screw extruder to prepare an oil-resistant rubber tube with good tear resistance;
and (3) vulcanization and shaping: and placing the prepared oil-resistant rubber tube with good tear resistance of the initial finished product in a vulcanizing tank for vulcanization molding, controlling the temperature in the vulcanizing tank to be 140-180 ℃, and vulcanizing for 45-75min to prepare the oil-resistant rubber tube with good tear resistance of the final finished product, taking out the oil-resistant rubber tube with good tear resistance of the final finished product, trimming burrs, and naturally cooling to obtain the finished product.
2. The method for preparing the oil-resistant rubber hose with good tear resistance according to claim 1, wherein the toughening layer is arranged between the inner rubber hose and the outer rubber hose, and the inner rubber hose and the outer rubber hose comprise the same raw materials.
3. The method for preparing the oil-resistant rubber hose with good tear resistance according to claim 1, wherein the toughening layer is obtained by weaving glass fiber yarns and polyester yarns.
4. The method for preparing the oil-resistant rubber hose with good tear resistance according to claim 3, wherein the weaving method of the toughening layer comprises at least one of plain stitch, lock stitch and winding.
5. The method for preparing the oil-resistant rubber tube with good tear resistance according to claim 1, wherein the oil-resistant rubber tube is required to be kept still for 30 hours at a constant temperature after vulcanization.
6. The method for preparing the oil-resistant rubber hose with good tear resistance according to claim 1, wherein the plasticizer in the raw material of the inner rubber hose is paraffin oil, and the molecular weight of Ca in the paraffin oil is 7-9%.
7. The preparation method of the oil-resistant rubber hose with good tear resistance according to claim 1, wherein the discharge speed of the extruder is 0-500 KG/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239396.XA CN114571697A (en) | 2022-03-11 | 2022-03-11 | Preparation method of oil-resistant rubber hose with good tear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210239396.XA CN114571697A (en) | 2022-03-11 | 2022-03-11 | Preparation method of oil-resistant rubber hose with good tear resistance |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720900A (en) * | 2012-06-25 | 2012-10-10 | 浙江峻和橡胶科技有限公司 | Fuel rubber pipe and production process thereof |
| CN107325357A (en) * | 2017-08-22 | 2017-11-07 | 浙江久运汽车零部件有限公司 | A kind of transparent high thermoplasticity neoprene pipe and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720900A (en) * | 2012-06-25 | 2012-10-10 | 浙江峻和橡胶科技有限公司 | Fuel rubber pipe and production process thereof |
| CN107325357A (en) * | 2017-08-22 | 2017-11-07 | 浙江久运汽车零部件有限公司 | A kind of transparent high thermoplasticity neoprene pipe and preparation method thereof |
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