CN111333963A - High-pressure-resistance rubber pipe and preparation method and application thereof - Google Patents
High-pressure-resistance rubber pipe and preparation method and application thereof Download PDFInfo
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- CN111333963A CN111333963A CN202010186096.0A CN202010186096A CN111333963A CN 111333963 A CN111333963 A CN 111333963A CN 202010186096 A CN202010186096 A CN 202010186096A CN 111333963 A CN111333963 A CN 111333963A
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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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a general shape other than plane
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/026—Knitted fabric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0261—Polyamide fibres
- B32B2262/0269—Aromatic polyamide fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
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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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- 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
Abstract
The invention provides a high-pressure-resistant rubber pipe and a preparation method and application thereof. The high-pressure-resistant rubber pipe comprises an inner rubber layer, a reinforcing layer and an outer rubber layer which are sequentially stacked from inside to outside; the preparation raw materials of the inner adhesive layer and the outer adhesive layer respectively and independently comprise the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 7-9 parts of active agent, 39.6-49.5 parts of plasticizer, 10-14 parts of adhesive, 100-120 parts of filler, 7-8 parts of vulcanizing agent and 4 parts of anti-aging agent. The pressure resistance of the rubber tube provided by the invention reaches more than 2MPa, the rubber tube has outstanding high pressure resistance, the compression permanent deformation is as low as 40%, the thinning and the light weight of the large-diameter rubber tube are realized, the rubber tube can be used as a water delivery rubber tube of an engine radiator or a retarder, the high pressure requirement of a retarder pipeline is ensured, and the reliability and the service life of a whole vehicle pipeline system are improved.
Description
Technical Field
The invention belongs to the technical field of water pipes, and particularly relates to a high-pressure-resistant rubber pipe and a preparation method and application thereof.
Background
At present, with the continuous improvement of the requirements of emission regulations, the horsepower of the engine of a heavy commercial vehicle is continuously improved, the internal pressure of the engine is also continuously improved, and higher requirements are provided for an external water circulation pipeline of the engine. Particularly, after the retarder is adopted, because the retarder waterway rubber tube is connected in series in front of the engine temperature regulator, the large flow can pass through the retarder, and the rubber tube is required to have a large caliber. Because the retarder water inlet and outlet pressure is higher, the pressure resistance requirement of the corresponding retarder rubber tube is also improved. In addition, the reliability and the service life of the commercial vehicle are also gradually increased, and the reduction of the compression permanent deformation of the rubber tube and the overall improvement of the service life and the reliability are also required.
At present, the large-diameter waterway rubber tube with the diameter of 40 mm-90 mm for commercial vehicles in the market generally has the pressure resistance requirement of 0.6 MPa-1.0 MPa. Two schemes exist in the common waterway rubber tube: firstly, the rubber tube with the silicon rubber sandwiched with the cloth is high in cost, unstable in quality, low in production efficiency and difficult to assemble; and the rubber pipe adopting EPDM (ethylene propylene diene monomer) is reinforced by polyester cords or polyester cords, so that the price is low, but the rubber pipe has the defects of high-temperature expansion, easy shedding of joints, large wall thickness and difficult installation, and has the reliability risks of cracking, bursting, leakage and the like after long-term use.
Some domestic or joint-market commercial vehicles also have EPDM rubber pipes reinforced by aramid fiber ropes, but the general wall thickness is larger, the rubber pipe with the general outer diameter of more than 50mm has the wall thickness of 5 mm-6.5 mm, the defects of difficult assembly and easy falling exist, meanwhile, because the wall thickness is large, the rigidity is increased, the vibration damping performance is reduced, the cost is high, in addition, the general compression permanent deformation is higher, and generally more than 60 percent, the low-temperature leakage failure is caused.
Therefore, the water delivery hose with high pressure resistance, thin wall, large caliber and low compression permanent deformation is to be developed in the field.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-pressure-resistant rubber pipe and a preparation method and application thereof. The rubber tube provided by the invention has the advantages of high pressure resistance and low pressure change, can be made into a thin-wall and large-caliber rubber tube and is used for a pipeline system of a vehicle, so that the high pressure requirement of a retarder pipeline is ensured, the reliability and the service life of the whole vehicle pipeline system are improved, and the thin-wall and light-weight of the large-caliber rubber tube are realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a high pressure-resistant rubber pipe, which comprises an inner rubber layer, a reinforcing layer and an outer rubber layer which are sequentially laminated from inside to outside;
the preparation raw materials of the inner adhesive layer and the outer adhesive layer respectively and independently comprise the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 7-9 parts of active agent, 39.6-49.5 parts of plasticizer, 10-14 parts of adhesive, 100-120 parts of filler, 7-8 parts of vulcanizing agent and 4 parts of anti-aging agent.
In the present invention, the term "high pressure resistance" means that the burst pressure of the hose is 2MPa or more. The term "from inside to outside" means from the inner wall of the tube to the outer wall of the tube.
According to the invention, through the synergistic cooperation of the raw material components of the inner and outer rubber layers, the obtained rubber tube has the advantages of high pressure resistance and low pressure change, the thin-walled lightweight, low odor and environmental friendliness of the large-diameter rubber tube are realized, the wall thickness of the tube end is uniform without inner edges, the compression permanent deformation of the tube end is low, the sealing is reliable, the problem of low-temperature micro-leakage is solved, and meanwhile, the reliability and the service life of the product are greatly improved.
In the present invention, the active agent is present in an amount of 7 to 9 parts by weight, for example, 7 parts, 7.2 parts, 7.5 parts, 7.8 parts, 8 parts, 8.2 parts, 8.5 parts, 8.8 parts, or 9 parts.
The plasticizer is 39.6 to 49.5 parts by weight, and may be, for example, 39.6 parts, 40 parts, 40.5 parts, 41 parts, 41.5 parts, 42 parts, 42.5 parts, 43 parts, 43.5 parts, 44 parts, 44.5 parts, 45 parts, 45.5 parts, 46 parts, 46.5 parts, 47 parts, 47.5 parts, 48 parts, 48.5 parts, 49 parts, 49.5 parts, or the like.
The adhesive is 10-14 parts by weight, for example, 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts or 14 parts.
The filler is 100 to 120 parts by weight, and may be, for example, 100 parts, 101 parts, 102 parts, 103 parts, 104 parts, 105 parts, 106 parts, 107 parts, 108 parts, 109 parts, 110 parts, 111 parts, 112 parts, 113 parts, 114 parts, 115 parts, 116 parts, 117 parts, 118 parts, 119 parts, or 120 parts.
The vulcanizing agent is 7 to 8 parts by weight, and may be, for example, 7 parts, 7.1 parts, 7.2 parts, 7.3 parts, 7.4 parts, 7.5 parts, 7.6 parts, 7.7 parts, 7.8 parts, 7.9 parts, 8 parts or the like.
Preferably, the activator is composed of 4 to 5 parts (e.g., 4 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 4.8 parts, 4.9 parts, or 5 parts, etc.) zinc oxide, 1.5 to 2 parts (e.g., 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts, etc.) magnesium oxide, and 1.5 to 2 parts (e.g., 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts, etc.) stearic acid.
Preferably, the plasticizer is composed of 3.6 to 4.5 parts (e.g., may be 3.6 parts, 3.7 parts, 3.8 parts, 3.9 parts, 4 parts, 4.1 parts, 4.2 parts, 4.3 parts, 4.4 parts, or 4.5 parts, etc.) coumarone resin and 36 to 45 parts (e.g., may be 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, or 45 parts, etc.) dioctyl phthalate.
Preferably, the adhesive is a neoprene adhesive and/or maleic anhydride modified polybutadiene (MLPB).
In a preferred embodiment of the present invention, the filler is one or a combination of at least two selected from the group consisting of N550 carbon black, calcium bicarbonate and kaolin.
Preferably, the vulcanizing agent is DCP (dicumyl peroxide) and/or TAIC (triallyl isocyanurate).
Preferably, the antioxidant consists of 2 parts of antioxidant RD and 2 parts of antioxidant MB.
As a preferable technical scheme of the invention, the material of the reinforced layer is aramid fiber thread rope.
Preferably, the fiber fineness of the aramid fiber rope is more than or equal to 2500D.
As the preferable technical scheme of the invention, the thickness of the inner glue layer is 2.8 +/-0.1 mm, and the thickness of the outer glue layer is 1.8 +/-0.1 mm;
preferably, the wall thickness of the high pressure resistant rubber pipe is 4.5-5 mm; for example, it may be 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, or the like.
Preferably, the inner diameter of the high pressure resistant rubber pipe is 40-90 mm; for example, it may be 40mm, 45mm, 50mm, 55mm, 60mm, 63.5mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, or the like.
As a preferred technical scheme of the invention, the preparation raw materials of the inner adhesive layer and the outer adhesive layer respectively and independently comprise the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 4-5 parts of zinc oxide, 1.5-2 parts of magnesium oxide, 1.5-2 parts of stearic acid, 3.6-4.5 parts of coumarone resin, 36-45 parts of dioctyl phthalate, 10-14 parts of adhesive, 100-120 parts of filler, 7-8 parts of vulcanizing agent and 4 parts of anti-aging agent.
In a second aspect, the present invention provides a method for manufacturing a high pressure resistant rubber hose according to the first aspect, the method comprising the steps of:
(1) plasticating ethylene propylene diene monomer in an internal mixer;
(2) mixing the ethylene propylene diene monomer treated in the step (1) with other components except a vulcanizing agent in an internal mixer to obtain a rubber compound;
(3) thinly passing the mixed rubber obtained in the step (2) and a vulcanizing agent in an open mill, and then smashing the mixed rubber in a rubber overturning machine to obtain an inner rubber layer rubber material and an outer rubber layer rubber material respectively;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder to form an inner rubber layer, knitting a reinforcing layer on the inner rubber layer, putting the outer rubber layer rubber material obtained in the step (3) into the extruder, and extruding the outer rubber layer outside the reinforcing layer to obtain a high-pressure-resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber pipe blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber pipe, pressurizing, shaping, vulcanizing and obtaining the high-pressure-resistant rubber pipe.
As a preferred embodiment of the present invention, the temperature of the plastication in the step (1) is 70 to 90 ℃ and may be, for example, 70 ℃, 72 ℃, 75 ℃, 78 ℃, 80 ℃, 82 ℃, 85 ℃, 88 ℃ or 90 ℃ or the like; the time period required was 5 minutes.
Preferably, the mixing time in step (2) is 8 minutes, the binder removal temperature is 110-.
Preferably, step (2) further comprises: after the mixing is finished, cooling the mixed rubber to below 60 ℃, and standing for 24 hours.
Preferably, the roller distance of the open mill in the step (3) is 0.6-0.8mm, and the number of thin passing is 3.
Preferably, the distance between the rollers of the glue turning machine in the step (3) is 8mm, and the time for glue smashing is 3 minutes.
Preferably, three layers of filter screens are arranged in the extruder head in the step (4), and the mesh number of the filter screens is respectively 16 meshes, 60 meshes and 16 meshes.
Preferably, the knitting in step (4) is performed by a flat knitting process.
Preferably, the density of the knitted net in the step (4) is more than or equal to 20/5 cm; for example, 20/5cm, 22/5cm, 25/5cm, etc. may be mentioned.
Preferably, the extrusion temperature of the outer glue layer in the step (4) is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃ and the screw section is 35 ℃; the screw speed for extruding the outer glue layer was 20 rpm.
Preferably, the temperature of the vulcanization in the step (5) is 150-; the time is 30 to 35 minutes, and may be, for example, 30 minutes, 31 minutes, 32 minutes, 33 minutes, 34 minutes, 35 minutes, or the like.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 70-90 ℃ for 5 minutes, and standing for more than 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except the vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a mixing machine after the temperature reaches 110-120 ℃, cooling to below 60 ℃, and then placing for 24 hours;
(3) adding the rubber compound obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.6-0.8mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing after finishing, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; the reinforced layer is knitted on the inner rubber layer by adopting a flat knitting process, and the net flower density is more than or equal to 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber tube blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber tube, pressurizing and shaping, putting the high-pressure-resistant rubber tube blank into a vulcanizing tank, vulcanizing at the temperature of 150 plus 155 ℃ for 30-35 minutes, taking out the high-pressure-resistant rubber tube blank after vulcanization, and performing end cutting and trimming after depoling, cooling and cleaning to obtain the high-pressure-resistant rubber tube.
In a third aspect, the invention provides a use of the high pressure resistant rubber hose of the first aspect, which is characterized in that the high pressure resistant rubber hose is used as a water delivery high pressure resistant rubber hose of an engine radiator or a retarder.
Compared with the prior art, the invention has the following beneficial effects:
the hose provided by the invention has the advantages that the pressure resistance of a bursting test is more than 2MPa, the hose has outstanding high pressure resistance, after the hose is processed at a high temperature of 130 ℃ for 1h, the change rate of the outer diameter under the pressure of 0.30MPa is less than or equal to 15%, the reliability and the service life of the hose are greatly improved through verification of PVT (pressure of 0.30MPa, vibration and temperature alternation) for 180h, the hose can be made into a large-diameter (inner diameter of 40-90mm) thin-wall (wall thickness of 4.5-5mm) hose, the thinning and the light weight of the large-diameter hose are realized, the rigidity is relatively small, and.
The rubber tube provided by the invention solves the quality problems of high-temperature expansion, falling off and the like of the EPDM water tube commonly used in the current industry. The silicon rubber tube formed by manual winding is replaced, so that the weight and cost can be reduced, the production efficiency is high, and the product quality is stable.
The rubber tube provided by the invention is low in odor and environment-friendly, adopts a stub-free metal cap process, ensures that the wall thickness of the tube end is uniform and has no inner edge, the compression permanent deformation of the tube end is low and reaches 35-45%, the sealing is reliable, the problem of low-temperature micro-leakage of a commercial vehicle pipeline system is solved, and the technical level of products and industries is improved.
Drawings
FIG. 1 is a schematic sectional view of a high pressure-resistant hose according to the present invention;
wherein, 1 is an outer glue layer, 2 is a reinforced layer, and 3 is an inner glue layer.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It should be understood by those skilled in the art that the specific embodiments are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a high pressure-resistant rubber pipe, which has a structure as shown in fig. 1, and comprises an inner rubber layer 3, a reinforcing layer 2 and an outer rubber layer 1 from inside to outside in sequence;
the inner rubber layer 3 and the outer rubber layer 1 are prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 4 parts of zinc oxide, 2 parts of magnesium oxide, 1.5 parts of stearic acid, 4.5 parts of coumarone resin, 36 parts of dioctyl phthalate, 14 parts of A-9014 parts of N550 carbon black, 8 parts of DCP, 2 parts of anti-aging agent RD and 2 parts of anti-aging agent MB;
the thickness of the inner glue layer 3 is 2.8mm, and the thickness of the outer glue layer is 1.8 mm; the enhancement layer 2 is formed by 2500D aramid fiber rope through flat knitting, and the inner diameter of the rubber tube is 40 mm.
The preparation method of the high-pressure-resistant rubber pipe comprises the following steps:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 70 ℃ for 5 minutes, and standing for 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except the vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a milling machine after the temperature reaches 110 ℃, cooling to below 60 ℃, and placing for 24 hours;
(3) adding the mixed rubber obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.6mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing the rubber strips after the completion, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; knitting the reinforced layer on the inner rubber layer by adopting a flat knitting process, wherein the net flower density is 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber pipe blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber pipe, pressurizing and shaping, putting the high-pressure-resistant rubber pipe blank into a vulcanizing tank, vulcanizing at 150 ℃ for 35 minutes, taking out the high-pressure-resistant rubber pipe blank after vulcanization, and performing end cutting and trimming after depoling, cooling and cleaning to obtain the high-pressure-resistant rubber pipe.
Example 2
The embodiment provides a high pressure-resistant rubber pipe, which has a structure as shown in fig. 1, and comprises an inner rubber layer 3, a reinforcing layer 2 and an outer rubber layer 1 from inside to outside in sequence;
the inner rubber layer 3 and the outer rubber layer 1 are prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 5 parts of zinc oxide, 1.5 parts of magnesium oxide, 2 parts of stearic acid, 3.6 parts of coumarone resin, 45 parts of dioctyl phthalate, 10 parts of MLPB, 120 parts of calcium bicarbonate, 7 parts of TAIC, 2 parts of anti-aging agent RD and 2 parts of anti-aging agent MB;
the thickness of the inner glue layer 3 is 2.8mm, and the thickness of the outer glue layer is 1.8 mm; the enhancement layer 2 is formed by 2500D aramid fiber ropes through flat knitting; the inner diameter of the rubber tube is 70 mm.
The preparation method of the high-pressure-resistant rubber pipe comprises the following steps:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 90 ℃ for 5 minutes, and standing for 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except the vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a milling machine after the temperature reaches 120 ℃, cooling to below 60 ℃, and placing for 24 hours;
(3) adding the mixed rubber obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.8mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing the rubber strips after the completion, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; knitting the reinforced layer on the inner rubber layer by adopting a flat knitting process, wherein the net flower density is 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber tube blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber tube, pressurizing and shaping, putting the high-pressure-resistant rubber tube into a vulcanizing tank, vulcanizing at 155 ℃ for 30 minutes, taking out after vulcanization, and performing core removal, cooling and cleaning to perform end cutting and finishing to obtain the high-pressure-resistant rubber tube.
Example 3
The embodiment provides a high pressure-resistant rubber pipe, which has a structure as shown in fig. 1, and comprises an inner rubber layer 3, a reinforcing layer 2 and an outer rubber layer 1 from inside to outside in sequence;
the inner rubber layer 3 and the outer rubber layer 1 are prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 4.5 parts of zinc oxide, 1.8 parts of magnesium oxide, 1.8 parts of stearic acid, 4 parts of coumarone resin, 40 parts of dioctyl phthalate, 12 parts of MLPB, 110 parts of argil, 7.5 parts of DCP, 2 parts of anti-aging agent RD and 2 parts of anti-aging agent MB;
the thickness of the inner glue layer 3 is 2.8mm, and the thickness of the outer glue layer is 1.8 mm; the enhancement layer 2 is formed by 2500D aramid fiber ropes through flat knitting; the inner diameter of the rubber tube is 90 mm.
The preparation method of the high-pressure-resistant rubber pipe comprises the following steps:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 80 ℃ for 5 minutes, and standing for 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except a vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a milling machine after the temperature reaches 115 ℃, cooling to below 60 ℃, and then placing for 24 hours;
(3) adding the mixed rubber obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.7mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing the rubber strips after the completion, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; knitting the reinforced layer on the inner rubber layer by adopting a flat knitting process, wherein the net flower density is 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber pipe blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber pipe, pressurizing and shaping, putting the high-pressure-resistant rubber pipe blank into a vulcanizing tank, vulcanizing at 152 ℃ for 32 minutes, taking out the high-pressure-resistant rubber pipe blank after vulcanization, and performing end cutting and trimming after depoling, cooling and cleaning to obtain the high-pressure-resistant rubber pipe.
Example 4
The embodiment provides a high pressure-resistant rubber pipe, which has a structure as shown in fig. 1, and comprises an inner rubber layer 3, a reinforcing layer 2 and an outer rubber layer 1 from inside to outside in sequence; the inner rubber layer 3 and the outer rubber layer 1 are prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 4.8 parts of zinc oxide, 1.6 parts of magnesium oxide, 2 parts of stearic acid, 4.3 parts of coumarone resin, 43 parts of dioctyl phthalate, A-905 parts, 6 parts of MLPB, 60 parts of N550 carbon black, 60 parts of argil, 7.2 parts of DCP, 2 parts of anti-aging agent RD and 2 parts of anti-aging agent MB.
The thickness of the inner glue layer 3 is 2.8mm, and the thickness of the outer glue layer is 1.8 mm; the enhancement layer 2 is formed by 2500D aramid fiber ropes through flat knitting; the inner diameter of the rubber tube is 50 mm.
The preparation method of the high-pressure-resistant rubber pipe comprises the following steps:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 80 ℃ for 5 minutes, and standing for 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except a vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a milling machine after the temperature reaches 115 ℃, cooling to below 60 ℃, and then placing for 24 hours;
(3) adding the mixed rubber obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.7mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing the rubber strips after the completion, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; knitting the reinforced layer on the inner rubber layer by adopting a flat knitting process, wherein the net flower density is 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber pipe blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber pipe, pressurizing and shaping, putting the high-pressure-resistant rubber pipe blank into a vulcanizing tank, vulcanizing at 152 ℃ for 32 minutes, taking out the high-pressure-resistant rubber pipe blank after vulcanization, and performing end cutting and trimming after depoling, cooling and cleaning to obtain the high-pressure-resistant rubber pipe.
Example 5
The embodiment provides a high pressure-resistant rubber pipe, which has a structure as shown in fig. 1, and comprises an inner rubber layer 3, a reinforcing layer 2 and an outer rubber layer 1 from inside to outside in sequence; the inner rubber layer 3 and the outer rubber layer 1 are prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 5 parts of zinc oxide, 2 parts of magnesium oxide, 1.5 parts of stearic acid, 3.8 parts of coumarone resin, 38 parts of dioctyl phthalate, A-904 parts of MLPB, 55 parts of N550 carbon black, 50 parts of calcium bicarbonate, 8 parts of TAIC, 2 parts of anti-aging agent RD and 2 parts of anti-aging agent MB.
The thickness of the inner glue layer 3 is 2.8mm, and the thickness of the outer glue layer is 1.8 mm; the enhancement layer 2 is formed by 2500D aramid fiber ropes through flat knitting; the inner diameter of the rubber tube is 63.5 mm.
The preparation method of the high-pressure-resistant rubber pipe comprises the following steps:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 80 ℃ for 5 minutes, and standing for 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except a vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a milling machine after the temperature reaches 115 ℃, cooling to below 60 ℃, and then placing for 24 hours;
(3) adding the mixed rubber obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.7mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing the rubber strips after the completion, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; knitting the reinforced layer on the inner rubber layer by adopting a flat knitting process, wherein the net flower density is 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber pipe blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber pipe, pressurizing and shaping, putting the high-pressure-resistant rubber pipe blank into a vulcanizing tank, vulcanizing at 152 ℃ for 32 minutes, taking out the high-pressure-resistant rubber pipe blank after vulcanization, and performing end cutting and trimming after depoling, cooling and cleaning to obtain the high-pressure-resistant rubber pipe.
Performance testing
The performance of the hoses provided in examples 1-5 above was tested by the following test methods:
pressure resistance pressure: cutting a hose with the length of 400mm from a sample or a product to obtain the sample, connecting the sample on a blasting test bed, filling a test medium (water or other media which do not corrode an inner rubber layer of the hose and test equipment) into the test bed, removing all air, pressurizing at the speed of 2MPa/min +/-0.5 MPa/min until the hose bursts, wherein the pressure at the moment is pressure-resistant pressure.
Rate of change of outer diameter: placing the rubber tube at the temperature of 130 +/-2 ℃ for 1h, pressurizing to 0.3MPa, maintaining the pressure for 3min, measuring the outer diameter of the rubber tube before and after testing, and calculating the change rate of the outer diameter.
Compression set test: performing a test according to the regulation of GB/T7759.1-2015, preparing a B-type sample on a hose, wherein the diameter of the sample is 13.0mm +/-0.5 mm, the thickness of the sample is the thickness of the hose, the compression rate is 25%, the test temperature is 125 +/-3 ℃, and the test time is 72h +/-2 h; after the test is finished, the test device is taken out according to the method A, the sample is loosened, the height of the sample is measured after the test device is placed for 30min, and the compression permanent deformation is calculated.
PVT test:
the ambient temperature was raised from ambient to 100 deg.C, the cooling fluid was heated to 105 deg.C + -8 deg.C, and the flow rate through the sample was controlled to about 20L/min while circulating the sample from 50kPa at 15kPa to 300kPa + -15 kPa. The time is about 1 h. And continuing the vibration and pressure test for 4 h. Note: the temperature of the sample piece must be at least 105 c within 4 h. The room temperature and the medium temperature of the environmental chamber are reduced to-10 ℃, and the cooling liquid heater and the vibration system are closed. The time is about 1 h. Note: the pressure cycle continued unchanged for 1 h.
Closing the pressure cycle, continuously cooling to-40 ℃, and cooling for about 1 h; soaking the sample piece for 1h at low temperature. Note: the temperature of the sample must be below-32 ℃ within 1 h. This phase shuts down the coolant heater, coolant flow device, pressure cycling and vibration system. After the low-temperature soaking is finished, the test is repeated, and one test period is about 8 hours.
The test is carried out for 25 complete test cycles, about 200 h. And observing whether leakage failure occurs.
The results of the above tests are shown in table 1 below:
TABLE 1
The test results in table 1 show that the pressure resistance of the rubber tube provided by the invention reaches more than 2MPa, the rubber tube has outstanding high pressure resistance, the rubber tube is combined with low compression permanent deformation performance, and the failure problems such as leakage and the like do not occur in a PVT test, so that the rubber tube realizes the thin wall and light weight of the large-diameter rubber tube, can be used as a water delivery rubber tube of an engine radiator or a retarder, ensures the high pressure requirement of a retarder pipeline, improves the reliability and the service life of a whole vehicle pipeline system, and simultaneously reduces the cost by more than 40 percent compared with the rubber tube for the whole foreign vehicle.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A high pressure-resistant rubber pipe is characterized by comprising an inner rubber layer, a reinforcing layer and an outer rubber layer which are sequentially laminated from inside to outside;
the preparation raw materials of the inner adhesive layer and the outer adhesive layer respectively and independently comprise the following components in parts by weight: 100 parts of ethylene propylene diene monomer, 7-9 parts of active agent, 39.6-49.5 parts of plasticizer, 10-14 parts of adhesive, 100-120 parts of filler, 7-8 parts of vulcanizing agent and 4 parts of anti-aging agent.
2. The high pressure resistant rubber hose according to claim 1, wherein the activator is composed of 4-5 parts of zinc oxide, 1.5-2 parts of magnesium oxide and 1.5-2 parts of stearic acid;
preferably, the plasticizer consists of 3.6-4.5 parts of coumarone resin and 36-45 parts of dioctyl phthalate;
preferably, the adhesive is a neoprene adhesive and/or a maleic anhydride modified polybutadiene.
3. The high pressure resistant hose according to claim 1 or 2, wherein the filler is one or a combination of at least two selected from the group consisting of N550 carbon black, calcium bicarbonate and china clay;
preferably, the vulcanizing agent is DCP and/or TAIC;
preferably, the antioxidant consists of 2 parts of antioxidant RD and 2 parts of antioxidant MB.
4. The high pressure hose according to any one of claims 1 to 3, wherein the material of the reinforcement layer is aramid cord;
preferably, the fiber fineness of the aramid fiber rope is more than or equal to 2500D.
5. The high pressure resistant rubber hose according to any one of claims 1 to 4, wherein the thickness of the inner rubber layer is 2.8 ± 0.1mm, and the thickness of the outer rubber layer is 1.8 ± 0.1 mm;
preferably, the wall thickness of the high pressure resistant rubber pipe is 4.5-5 mm;
preferably, the inner diameter of the high pressure-resistant rubber hose is 40-90 mm.
6. The high pressure resistant rubber hose according to any one of claims 1 to 5, wherein the raw materials for preparing the inner rubber layer and the outer rubber layer each independently comprise, in parts by weight: 100 parts of ethylene propylene diene monomer, 4-5 parts of zinc oxide, 1.5-2 parts of magnesium oxide, 1.5-2 parts of stearic acid, 3.6-4.5 parts of coumarone resin, 36-45 parts of dioctyl phthalate, 10-14 parts of adhesive, 100-120 parts of filler, 7-8 parts of vulcanizing agent and 4 parts of anti-aging agent.
7. A method for manufacturing a high pressure resistant hose according to any one of claims 1 to 6, comprising the steps of:
(1) plasticating ethylene propylene diene monomer in an internal mixer;
(2) mixing the ethylene propylene diene monomer treated in the step (1) with other components except a vulcanizing agent in an internal mixer to obtain a rubber compound;
(3) thinly passing the mixed rubber obtained in the step (2) and a vulcanizing agent in an open mill, and then smashing the mixed rubber in a rubber overturning machine to obtain an inner rubber layer rubber material and an outer rubber layer rubber material respectively;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder to form an inner rubber layer, knitting a reinforcing layer on the inner rubber layer, putting the outer rubber layer rubber material obtained in the step (3) into the extruder, and extruding the outer rubber layer outside the reinforcing layer to obtain a high-pressure-resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber pipe blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber pipe, pressurizing, shaping, vulcanizing and obtaining the high-pressure-resistant rubber pipe.
8. The method according to claim 7, wherein the temperature of the mastication in the step (1) is 70 to 90 ℃ for 5 minutes;
preferably, the mixing time in the step (2) is 8 minutes, and the glue discharging temperature is 110-120 ℃;
preferably, step (2) further comprises: after the mixing is finished, cooling the mixed rubber to below 60 ℃, and standing for 24 hours;
preferably, the roller distance of the open mill in the step (3) is 0.6-0.8mm, and the number of thin passing is 3;
preferably, the distance between the rollers of the glue turning machine in the step (3) is 8mm, and the time for glue smashing is 3 minutes;
preferably, three layers of filter screens are arranged in the extruder head in the step (4), and the mesh number of the filter screens is respectively 16 meshes, 60 meshes and 16 meshes;
preferably, the knitting in the step (4) adopts a flat knitting process;
preferably, the density of the knitted net in the step (4) is more than or equal to 20/5 cm;
preferably, the extrusion temperature of the outer glue layer in the step (4) is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃ and the screw section is 35 ℃; the rotating speed of the screw for extruding the outer rubber layer is 20 rpm;
preferably, the temperature of the vulcanization in the step (5) is 150 ℃ and 155 ℃ for 30-35 minutes.
9. The method according to claim 7 or 8, characterized in that it comprises the steps of:
(1) plasticating ethylene propylene diene monomer rubber in an internal mixer at 70-90 ℃ for 5 minutes, and standing for more than 8 hours after discharging;
(2) mixing the ethylene propylene diene monomer treated in the step (1) and other components except the vulcanizing agent in an internal mixer for 8 minutes, discharging the mixed rubber on a roller of a mixing machine after the temperature reaches 110-120 ℃, cooling to below 60 ℃, and then placing for 24 hours;
(3) adding the rubber compound obtained in the step (2) and a vulcanizing agent into an open mill, thinly passing for 3 times at a roll distance of 0.6-0.8mm, then tamping for 3 minutes in a rubber turning machine at a roll distance of 8mm, cooling and standing after finishing, and respectively obtaining an inner rubber layer rubber material and an outer rubber layer rubber material;
(4) extruding the inner rubber layer rubber material obtained in the step (3) by using an extruder; the reinforced layer is knitted on the inner rubber layer by adopting a flat knitting process, and the net flower density is more than or equal to 20/5 cm; putting the outer rubber layer rubber material obtained in the step (3) into an extruder, and extruding the outer rubber layer outside the enhancement layer, wherein the extrusion temperature of the outer rubber layer is as follows: the head is 80 ℃, the extrusion section is 70 ℃, the plasticizing section is 55 ℃, the feeding section is 45 ℃, the screw section is 35 ℃, and the rotating speed of the screw for extruding the outer rubber layer is 20 rpm; three layers of filter screens are arranged in the extruder heads of the inner adhesive layer and the outer adhesive layer, and the mesh number of the filter screens is 16 meshes, 60 meshes and 16 meshes respectively; obtaining a high pressure resistant rubber pipe blank;
(5) sleeving the high-pressure-resistant rubber tube blank obtained in the step (4) on a mold mandrel, adding stub bar-free metal caps at two ends of the high-pressure-resistant rubber tube, pressurizing and shaping, putting the high-pressure-resistant rubber tube blank into a vulcanizing tank, vulcanizing at the temperature of 150 plus 155 ℃ for 30-35 minutes, taking out the high-pressure-resistant rubber tube blank after vulcanization, and performing end cutting and trimming after depoling, cooling and cleaning to obtain the high-pressure-resistant rubber tube.
10. Use of a high pressure hose according to any of claims 1-6 as a water hose for engine radiators or retarders.
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| CN113669513A (en) * | 2021-07-06 | 2021-11-19 | 中裕软管科技股份有限公司 | Water absorption device with variable pipe diameter |
| CN114593282A (en) * | 2022-03-10 | 2022-06-07 | 一汽解放汽车有限公司 | Low-compression permanent deformation rubber tube and preparation method and application thereof |
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| CN107474403A (en) * | 2017-09-05 | 2017-12-15 | 武城水星天元橡塑材料科技研发有限公司 | Glue material and preparation method and application inside and outside a kind of compound rubber pipe |
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| US20050058795A1 (en) * | 2003-09-15 | 2005-03-17 | Beck Harold D. | Vinyl ester hose and method for manufacture of such hose |
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| CN112677522A (en) * | 2020-12-18 | 2021-04-20 | 中国第一汽车股份有限公司 | Preparation method of high-temperature-resistant low-pressure-variable cooling rubber pipe |
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| CN114593282B (en) * | 2022-03-10 | 2024-03-19 | 一汽解放汽车有限公司 | Low-compression permanent deformation rubber tube and preparation method and application thereof |
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