CN110359421B - Long-life high-pressure water shutoff rubber air bag and production process - Google Patents
Long-life high-pressure water shutoff rubber air bag and production process Download PDFInfo
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- CN110359421B CN110359421B CN201910692774.8A CN201910692774A CN110359421B CN 110359421 B CN110359421 B CN 110359421B CN 201910692774 A CN201910692774 A CN 201910692774A CN 110359421 B CN110359421 B CN 110359421B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
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- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 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
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/02—Inflatable articles
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
- E02B3/106—Temporary dykes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Laminated Bodies (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention discloses a long-life high-pressure water shutoff rubber air bag and a production process thereof, and relates to the field of large-scale rubber products. The air bag comprises a bag body (1), a flange (2), a hanging ring (3) and an air charging and discharging nozzle (4), wherein the bag body is cylindrical, the two ends of the bag body are circular arcs or flat circles and are provided with the hanging ring and the flange, and one end of the bag body is provided with the air charging and discharging nozzle; the bag body comprises an EPDM outer adhesive layer, a cord or steel wire framework layer, a middle adhesive layer and a modified brominated butyl inner adhesive layer. The invention has simple and convenient production, no need of internal mold, and the pressure resistance of the obtained product is more than 1.2MPa, the service life is more than 50 years, and the environmental sanitation index exceeds the national standard by 4 orders of magnitude. The device is particularly suitable for underwater high-pressure or urban construction pipeline rush repair water, or ship launching in sea water, petroleum drilling machine and the like, and the application range is 120 m in deep water.
Description
Technical Field
The invention relates to a long-life high-pressure water shutoff rubber air bag and a production process thereof, and relates to a large-scale rubber product with continuous framework materials and high strength and a production process thereof. The device is particularly suitable for underwater high-pressure or urban construction pipeline rush repair water and ship launching, petroleum drilling rigs and the like.
Background
High strength rubber products are often reinforced with fibrous matrix materials. However, it is difficult to produce large rubber products, particularly products of the totally enclosed type (continuous reinforcing matrix fibers), by the one-time heat vulcanization method with integral molding and integral pressurization.
Such as: ma Zikun et al disclose a "a silicone rubber airbag molding method for the manufacture of engine insulation (CN 104972575B)", which is a technique of "preparing a mold and a corresponding silicone rubber green sheet according to the requirements of the airbag; then vulcanizing, bonding and secondary vulcanizing the straight tube section material, vulcanizing the end material, bonding and molding the straight tube section, sequentially bonding the two ends of the straight tube section with the end, and vulcanizing to obtain the molded silicone rubber air bag.
The production process is sectional vulcanization, the product quality is uniform and difficult to ensure, the product is not reinforced by adopting a fiber skeleton material, and the relative strength is low.
Xu Guzhong et al discloses a "a ship launching fiber reinforced rubber airbag and molding process (CN 105836072A)", which is characterized in that: the two ends of the core mould are provided with the bag heads in an equal stress structure, and the rubber bag body is provided with a rubber layer, a fiber reinforced layer and a protective layer. The forming process comprises the following steps: firstly, winding and fully distributing a rubber belt on the surface of a core mold to form a rubber layer, and secondly, fully distributing dry fiber yarns on the surface of the rubber layer by a specific geodesic winding process to form a fiber reinforced layer; then winding the rubber belt on the surface of the fiber reinforced layer in a plurality of layers to form a protective layer; and finally, vulcanizing and demolding the wound rubber air bag.
The key problems are not solved, 1) the core mold material is prepared; 2) How the shape is fixed; 3) How to vulcanize; 4) How to release the mold.
Hou Linfang et al discloses a processing method (CN 105836072A) of a rubber air bag special for an oil rig, which is characterized in that: the internal pressure of the air bag is increased by supplying water through a high-pressure pump, and the air bag is vulcanized for 50 to 70 minutes under the conditions that the temperature is 150 ℃ and the pressure is 2.5 Mpa; an automatic rubber air bag mould on a vulcanizing machine is adopted.
The problems are as follows: 1) The semi-finished tire preforming process does not adopt an internal mold, and the shape and the size of the semi-finished tire are difficult to ensure; 2) Cumbersome and costly automated airbag molds are used.
Disclosure of Invention
The invention aims to provide an underwater long-life high-pressure water shutoff rubber air bag and a production process thereof, and relates to the field of large-scale rubber products with continuous high strength framework materials and preparation. The invention has simple and convenient production; the pressure resistance of the product is more than 1.2MPa, the service life is more than 50 years, and the environmental sanitation index exceeds the national standard by 4 orders of magnitude. The device is particularly used for underwater high-pressure or urban construction pipeline rush repair water blocking, or ship launching, petroleum drilling machine and the like.
The invention aims at realizing the following technical scheme:
The utility model provides a long-life high pressure water shutoff rubber gasbag, the gasbag includes bag body, flange, rings and fills the bleed mouth, and the bag body is the cylinder, and both ends are circular arc or plain circle and all are equipped with flange and two rings, and one of them end still is equipped with fills the bleed mouth; the bag body comprises an EPDM outer adhesive layer, a cord or steel wire framework layer which is crossed and paved at an angle of 46-56 degrees, a middle adhesive layer which is formed by combining neoprene and natural adhesive, and a brominated butyl inner adhesive layer which is modified by maleic anhydride suspension grafting; the outer adhesive layer comprises the following components in mass: 100 parts of EPDM, 220 parts of carbon black N, 50 parts of naphthenic oil, 10 parts of zinc oxide, 5 parts of SA, 1 part of OVP and 1-10 parts of alkali metal salt.
The long-life high-pressure water shutoff rubber air bag is characterized in that the maximum size of the air bag is as follows: the diameter phi 4m x11 m is long.
The long-life high-pressure water shutoff rubber air bag is characterized in that the cord or the steel wire framework layer is formed by winding a double-layer cord or steel wire mesh coated with rubber at an angle of 46-56 degrees, and is paved in a crossing manner at an angle of 90 degrees, and the double surfaces of each layer of cord or steel wire mesh are coated with middle rubber.
The long-life high-pressure water shutoff rubber air bag is characterized in that the cord is made of polyester or nylon; the steel wire layer adopts 304 stainless steel mesh.
The production process of the long-life high-pressure water shutoff rubber air bag comprises the following specific production steps of: (1) Manufacturing a disposable cylinder mould by using paper pulp, wherein one end of the mould is provided with an air tap hole; (2) plasticating, compounding, mixing and blanking raw rubber; (3) dipping and hanging glue on the framework layer; (4) Sequentially winding an inner adhesive layer, a framework layer, a middle adhesive layer and an outer adhesive layer on a paper mold, and preforming; (5) winding a plurality of layers of water adhesive tapes on the preformed product blank; (6) integral vulcanization; (7) Taking out, dissolving the boiled water adhesive tape, and introducing hot water to remove broken paper pulp; (8) installing end flanges, air nozzles and hanging rings.
The production process of the long-life high-pressure water shutoff rubber air bag is characterized in that the disposable cylinder mould is manufactured by paper pulp, and specifically comprises the following steps: breaking waste paper with shredder, soaking in water to obtain pasty pulp; adhering a layer of paper on the cylinder steel core, wherein one end of the paper is provided with an air tap hole, adding an inner piece of the flange in advance, and pasting pasty paper pulp on the paper; and naturally dehydrating and hardening at room temperature to obtain the cylindrical paper mold with inner flanges at two ends.
The production process of the long-life high-pressure water shutoff rubber air bag comprises the following steps of sequentially winding an inner adhesive layer, a framework layer, a middle adhesive layer and an outer adhesive layer on a paper mold: (1) Forming an inner adhesive layer modified brominated butyl rubber sheet on a paper mold according to the designed thickness, wherein the butt joint parts of the rubber sheets are connected in a slope manner; (2) Winding a plurality of layers of rubberized cords at an angle of 46-56 degrees, crossing the cords at an angle of 90 degrees, and reserving the rubberized cords within 300mm at the two ends of the roller for pre-lapping treatment, wherein each layer of cords is separated by a polypropylene film; (3) The whole middle glue layer film is arranged, and the butt joint of the films is cut with a groove for bonding; (4) And (3) integrally adhering the EPDM outer adhesive layer film, and cutting grooves at the butt joint of the films.
The production process of the long-life high-pressure water shutoff rubber air bag comprises the steps of wrapping the water proof fabric with the water proof fabric, and putting on the water proof fabric to form the fabric protection bag.
The production process of the long-life high-pressure water shutoff rubber air bag comprises the following steps: pressurizing in vulcanizing tank for 0.6MPa/30min; the pulp mould keeps the internal pressure of 0.63MPa; and after the integral vulcanization is finished, taking out, and removing the boiled water adhesive tape to obtain a product containing the pulp mould, and introducing hot water into the product to remove the crushed pulp.
The production process of the long-life high-pressure water shutoff rubber air bag comprises the steps that the end flange consists of an inner flange and an outer flange, and is provided with hanging rings and bolts; one of the end flanges is also provided with an air tap.
The invention has the advantages and effects that:
1) Eight vinyl cage type silsesquioxane (OVP) is added into the EPDM outer adhesive layer, so that the outer adhesive layer has excellent comprehensive performance, particularly processing performance, and the mechanical property and wear resistance of the material are improved;
2) The maleic anhydride suspension grafting modified brominated butyl rubber is adopted as an inner rubber layer, so that the air tightness of the inner rubber layer is improved, and the outer rubber, the middle rubber and the inner rubber are well co-vulcanized;
3) The disposable paper mould is adopted, so that the one-step forming and vulcanization of a high-pressure and high-strength large seamless rubber product are met, and the complex process of taking out the inner mould is avoided;
4) The reinforced framework is formed by winding a rubberized cord or steel wire mesh in a double-layer (not less than 2 layers) at an angle of 46-56 degrees, and is laid in a crossing way at an angle of 90 degrees, so that the material and the product are uniformly stressed and flexible;
5) The water-in-water cloth pressurizing mode is adopted, so that the vulcanizing process is simpler, and an outer die is not needed;
6) The rubberized fabric protective bag is worn, so that the product can be prevented from contacting steam, and the quality and the production stability of the product are prevented from being influenced.
The production process is simple and convenient to operate, can meet the one-step molding and vulcanization of high-pressure and high-strength large-scale seamless rubber products, and has good production stability; the produced large rubber air bag has high compressive strength (the using pressure is more than 1.2 MPa), the service life in seawater is more than 50 years, and the environmental sanitation index exceeds the national standard by 4 orders of magnitude.
Drawings
FIG. 1 is a cross-sectional view of an air bag body of the present invention;
FIG. 2 is a diagram of an airbag product of the present invention;
FIG. 3 is an end view of an airbag product of the present invention.
Detailed Description
The present application will be described in detail with reference to the accompanying drawings.
Fig. 1 is a cross-sectional view of an air bag body according to the present invention, illustrating the relative orientations of the structural layers of the air bag body, and is labeled: 1A-outer adhesive layer, 1B-skeleton layer, 1C-middle adhesive layer and 1D-inner adhesive layer.
FIG. 2 is a schematic representation of an airbag product of the present invention, labeled: 1-a bag body, 2-flanges, 3-hanging rings and 4-charging and discharging nozzles;
FIG. 3 is an end view of an airbag product of the present invention.
The air bag comprises a bag body 1, a flange 2, a hanging ring 3 and an air charging and discharging nozzle 4; wherein, the bag body is cylindrical, the two ends are circular arcs or flat circles and are provided with a flange 2 and two hanging rings 3, and one end is also provided with an air charging and discharging nozzle 4; the bag body comprises an EPDM outer adhesive layer 1A, a cord or steel wire framework layer 1B, a neoprene and natural adhesive combined middle adhesive layer 1C and a maleic anhydride suspension grafting modified brominated butyl inner adhesive layer 1D.
Wherein, the mass composition of outer glue film is: 100 parts of EPDM, 220 parts of carbon black N, 50 parts of naphthenic oil, 10 parts of zinc oxide, 5 parts of SA, 1 part of OVP and 1-10 parts of alkali metal salt.
The cord or steel wire skeleton layer is formed by winding double layers of cord or steel wire gauze coated with rubber at an angle of 46-56 degrees, and is crossly paved at an angle of 90 degrees, and the double sides of each layer of cord or steel wire gauze are coated with middle rubber. The cord is polyester or nylon; the steel wire layer adopts 304 stainless steel mesh.
The maximum size of the air bag of the invention is phi 4m (diameter) x 11m (length).
The preparation process of the air bag comprises the following steps:
Step 1: breaking waste paper with shredder, soaking in water to obtain pasty pulp; adhering a layer of paper on the cylinder steel core, wherein one end of the paper is provided with an air tap hole, adding an inner piece of the flange in advance, and pasting pasty paper pulp on the paper; naturally dehydrating and hardening at room temperature to form the cylinder paper mold with inner flanges at two ends.
Step 2: raw rubber plasticating, compounding, mixing and blanking
(2-1) EPDM outer gel layer: according to the formula (weight portions), 100 portions of EPDM, 220 portions of carbon black N, 50 portions of naphthenic oil, 10 portions of zinc oxide, 5 portions of SA,1 portion of OVP and 1 to 10 portions of naphthenic oil. On an open mill, the method is operated according to the following technical process: rubber covered roller, zinc oxide, carbon black, stearic acid oil, OVP, accelerator and sulfur, mixing uniformly, cooling and discharging (50-70 ℃/less than 27 minutes/roller speed ratio 1.05-1.2:1) for standby.
The physical and mechanical properties of the vulcanized rubber are shown in Table 1, and the service life of the vulcanized rubber is as follows the international standard ISO 11346:1997, the hot air accelerated aging test at 70 ℃, 80 ℃ and 90 ℃ is carried out, the service life at 23 ℃ is extrapolated to 79.3 years (the safety factor is 2) according to the tensile property, and the food hygienic property is as shown in Table 2 according to national standard GB 4806.1-94 "hygienic Standard for rubber products for food".
(2-2) A middle adhesive layer used by neoprene and natural adhesive in combination: the general neoprene rubber comprises, by mass, 50 parts of epoxy modified natural rubber, 50 parts of S,1 part of TMTD,1.5 parts of tetrapod-like zinc oxide whiskers, 7 parts of BC,40 parts of SA,3 parts of naphthenic oil, 20 parts of TM808,2 parts of magnesium oxide, 4 parts of age resister 4010,1 parts of age resister D,1 part of tert-butylphenol formaldehyde resin and 30 parts of tert-butylphenol formaldehyde resin. On an open mill, the method is operated according to the following technical process: plasticating, compounding, mixing, high-temperature reinforcement, low-temperature crosslinking and sheet feeding for standby.
The physical and mechanical properties of the vulcanized rubber are shown in Table 3.
(2-3) Raw rubber plasticating, compounding, mixing and blanking (standby) of a maleic anhydride suspension grafting modified brominated butyl rubber inner rubber layer.
The vulcanized rubber material properties are tested and are shown in Table 4.
Step 3: and (3) dipping the high-strength cord or the steel wire mesh, and then hanging the middle glue layer glue on the double sides of the four-way calender to form a raw adhesive tape for later use.
The physical properties of the composite gum-applied fabric were also tested and are shown in Table 5.
Step 4: after an inner adhesive layer butyl rubber sheet is paved on a paper mold, winding a double layer (not lower than 2 layers) of rubberized cord or steel wire mesh according to an angle of 46-56 degrees, crossing the upper layer at an angle of 90 degrees, and respectively leaving rubber-free cord in 300mm at two ends of a roller for pre-lapping treatment (the cord layers are separated by a polypropylene film); the whole middle rubber film is adhered, and a groove is cut at the butt joint of the rubber films; covering a rubber sheet on the whole, and cutting a groove at the butt joint of the rubber sheet for bonding;
step 5: wrapping pressurized water cloth, putting on a rubberized fabric protective bag (made of waterproof rubberized fabric), and pressurizing in a vulcanizing tank for 0.6MPa/30min; the pulp mould was kept at an internal pressure of 0.63MPa.
Step6: and after the vulcanization is completed at 150 ℃ for 30min, taking out, opening the water cloth to obtain a product containing the pulp mould, and introducing hot water into the product to remove the crushed pulp.
Step 7: mounting end flange, air cock and rings.
The long-life high-pressure water shutoff rubber air bag is manufactured.
The testing method comprises the following steps:
GB/T2941-2006 Standard temperature, humidity and time for environmental Conditioning and testing of rubber samples (eqv ISO 23529:2004);
GB/T528-2009 determination of tensile stress Strain Properties of vulcanized rubber or thermoplastic rubber (eqv ISO 37:2005);
GB/T529-2008 "determination of tear Strength of vulcanized rubber or thermoplastic rubber (trouser, right-angle and crescent shaped samples) (eqv ISO 34:2004);
GB/T531.2-2009 method for testing indentation hardness of rubber pocket durometer (idt ISO 7619-2:2004);
GB/T3512-2001 "accelerated ageing and Heat resistance test of vulcanized rubber or thermoplastic rubber by hot air" (neq ISO 188:2011);
GB/T7759-2015 "determination of compression set at Normal temperature and high temperature for vulcanized rubber, thermoplastic rubber" (eqv ISO 815:2008);
GB/T7762-2014 static tensile test method for ozone aging resistance test of vulcanized rubber (neq ISO 1431/1:2004);
GB/T9865.1-1996 preparation of first part of samples and specimens of vulcanized rubber or thermoplastic rubber: physical test (idt ISO 4461-1:1993);
GB/T15256-2014 (eqv ISO 812:2011, method for measuring low-temperature brittleness of vulcanized rubber);
ISO 11346：2014"Rubber, vulcanized or thermoplastic - Estimation of life-time and maximum temperature of use from an Arrhenius plot";
GB 4806.11-2016 rubber materials for food contact and products;
GB/T532-2008 "determination of adhesion Strength of vulcanized rubber to fabrics" (neq ISO 36:2005);
HG/T2580-2008 determination of tensile Strength and elongation at break of rubber or Plastic coated fabrics (eqv ISO 1421:1977);
ASTM D 3985-05 Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor1.
Example 1
1) Disposable paper mould manufacturing: breaking waste paper with shredder, soaking in water to obtain pasty pulp; adhering a layer of paper on a cylinder steel core with the diameter of 0.5m multiplied by 1m prepared in advance, wherein one end of the cylinder steel core is provided with a small air nozzle hole, adding an inner piece with a prepared flange in advance, and pasting pasty paper pulp on the inner piece; naturally dehydrating and hardening at room temperature to form the cylinder paper mold with inner flanges at two ends.
2) And (3) preparing each layer of mixed rubber sheet:
(2-1) EPDM outer gel layer: according to the formula (mass portion), 100 portions of EPDM, 50 portions of carbon black N220, 10 portions of naphthenic oil, 5 portions of zinc oxide, SA,1 portion of OVP and 10 portions of naphthenic oil. On an open mill, the method is operated according to the following technical process: rubber covered roller, zinc oxide, carbon black, stearic acid oil, OVP, accelerator, sulfur, mixing evenly, cooling and discharging (50-70 ℃/less than 27 minutes/roller speed ratio 1.05-1.2:1).
After vulcanization at 150 ℃ for 30min, the physical and mechanical properties are shown in Table 1, and the service life is as per international standard ISO 11346:1997, the hot air accelerated aging test at 70 ℃, 80 ℃ and 90 ℃ is carried out, the service life at 23 ℃ is extrapolated to 79.3 years (the safety factor is 2) according to the tensile property, and the food hygienic property is as shown in Table 2 according to national standard GB 4806.1-94 "hygienic Standard for rubber products for food".
(2-2) A middle adhesive layer used by neoprene and natural adhesive in combination: the general neoprene rubber comprises, by mass, 50 parts of epoxy modified natural rubber, 50 parts of S,1 part of TMTD,1.5 parts of tetrapod-like zinc oxide whiskers, 7 parts of BC,40 parts of SA,3 parts of naphthenic oil, 20 parts of TM808,2 parts of magnesium oxide, 4 parts of age resister 4010,1 parts of age resister D,1 part of tert-butylphenol formaldehyde resin and 30 parts of tert-butylphenol formaldehyde resin. On an open mill, the method is operated according to the following technical process: plasticating, compounding, mixing, high-temperature reinforcement, low-temperature crosslinking and sheet feeding.
The physical and mechanical properties after vulcanization at 150℃for 30min are shown in Table 3.
(2-3) Raw rubber plasticating, compounding, mixing and blanking of a maleic anhydride suspension grafting modified brominated butyl rubber inner rubber layer. The physical and mechanical properties after vulcanization at 150℃for 30min are shown in Table 4.
3) Preparing a skeleton fiber layer: and (3) dipping the high-strength polyester cord, and then hanging a middle glue layer glue stock on the double sides of the four-way calender to prepare the raw adhesive tape.
4) After an inner adhesive layer butyl rubber sheet is paved on a paper mould, winding two layers of rubberized polyester cord yarns according to an angle of 46-56 degrees, crossing the rubberized polyester cord yarns at an angle of 90 degrees, and carrying out pre-lapping treatment on the rubberized cord yarns which are respectively left in 300mm at two ends of a roller (the cord yarn layers are separated by a polypropylene film); the whole middle glue layer film is arranged, and the butt joint of the films is cut with a groove for bonding; covering a rubber sheet on the whole, and cutting a groove at the butt joint of the rubber sheet for bonding;
5) Wrapping pressurized water cloth, putting on a rubberized fabric protective bag (made of waterproof rubberized fabric), and pressurizing in a vulcanizing tank for 0.6MPa/30min; the pulp mould was kept at an internal pressure of 0.63MPa.
6) And after the vulcanization is completed at 150 ℃ for 30min, taking out, opening the water cloth to obtain a product containing the pulp mould, and introducing hot water into the product to remove the crushed pulp.
7) The end flange, the air tap and the hanging ring are ready for installation.
Namely, the long-life high-pressure water shutoff rubber air bag with the phi of 0.5m multiplied by 1m in seawater (underwater) is manufactured.
Comparative example 1
The outer and inner rubber layers of EPDM were brominated butyl rubber without suspension grafting modification with maleic anhydride, and the outer and inner rubber were prepared as in example 1 and the physical and mechanical properties of the vulcanizate are shown in table 1. It can be seen that: EPDM outer gels without OVP have poorer overall properties, in particular abrasion resistance; the air tightness of the brominated butyl rubber modified with the suspension graft without maleic anhydride is significantly poorer than that of the modified brominated butyl rubber.
Comparative example 2
A skeletal fiber layer was prepared using plain polyester canvas instead of polyester cord, and a skeletal fiber layer was prepared as in example 1, and the physical and mechanical properties of the vulcanized rubber are shown in table 5. It can be seen that: the plain polyester canvas is relatively dense, and the rubber "hands" on both sides of the skeleton fiber are relatively difficult, so that the adhesive strength between the rubber and the fabric is slightly low.
Example 2
The EPDM outer gel layer was prepared as in example 1 with an OVP of 1 part and a frame fiber layer of a galvanized 304 stainless steel mesh (pore size 0.5-3mm, wire diameter 0.2-3 mm). The physical properties of the outer gel and the gum-applied fabric are shown in Table 6 and Table 7.
Example 3
The amount of OVP in the EPDM outer gel layer was 5 parts and a backbone fiber layer was prepared by using nylon cord instead of polyester cord, as in example 1. The physical properties of the outer gel and the gum-applied fabric are shown in Table 6 and Table 7. It can be seen that: good results can still be obtained.
Example 4
As in example 1, a long life, high pressure, water blocking rubber bladder of Φ4.0mX10 m was made from 2000D90 polyester cord. The pressure resistance test is carried out by an air compressor, and no pressure drop exists after 1.2MPa multiplied by 24 hs.
TABLE 1 outer glue line Properties
Vulcanization conditions: 150 ℃ x 30min
Table 2 outer glue layer food sanitation inspection
Vulcanization conditions: 150 ℃ x 30min
Performance of the glue line in Table 3
Vulcanization conditions: 150 ℃ x 30min
Table 4 inner glue line performance
Vulcanization conditions: 150 ℃ x 30min
Table 5 physical Properties of the composite gum-applied Fabric
The tensile strength of the compound adhesive coated fabric is not lower than the tensile strength of the coated fabric itself
TABLE 6 performance of outer glue layer
Vulcanization conditions: 150 ℃ x 30min
Table 7 physical Properties of the Compound gum liniments
The tensile strength of the compound gum coated fabric is not lower than the tensile strength of the coated fabric.
From the results in the tables and the detailed description, it can be seen that:
1) The EPDM external adhesive containing the OVP has excellent comprehensive performance, in particular to the improvement of the processability, the mechanical property of the material and the wear resistance;
2) The maleic anhydride suspension grafted modified brominated butyl rubber is used as an inner rubber layer, so that the air tightness of the rubber is improved, and the outer rubber, the middle rubber and the inner rubber are well co-vulcanized;
3) The disposable paper mould is adopted, so that the one-step forming and vulcanization of a high-pressure and high-strength large seamless rubber product are met, and the complex process of taking out the inner mould is avoided;
4) The reinforced framework adopts double layers of cord threads or steel wire meshes which are wound and glued at an angle of 46-56 degrees, and the reinforced framework is laid in a crossing way at an angle of 90 degrees, so that the material and the product are uniformly stressed and flexible;
5) The water-in-water cloth pressurizing mode is adopted, so that the vulcanizing process is simpler, and an outer die is not needed;
6) The rubberized fabric protective bag is worn, so that the product can be prevented from contacting steam, and the quality and the production stability of the product are prevented from being influenced.
The production process is simple and convenient to operate, can meet the one-step molding and vulcanization of high-pressure and high-strength large-scale seamless rubber products, and has good production stability; the produced large rubber air bag has high compressive strength (the using pressure is more than 1.2 MPa), the service life in seawater is more than 50 years, and the environmental sanitation index exceeds the national standard by 4 orders of magnitude.
Meanwhile, a new economic growth point is formed, the reference effect is provided for the development of related theory and application of materials and large-scale rubber products, and important social benefit and economic benefit are provided.
Claims (6)
1. A production process of a long-life high-pressure water shutoff rubber air bag is characterized by comprising the following steps of: the air bag comprises a bag body (1), a flange (2), hanging rings (3) and an air charging and discharging nozzle (4), wherein the bag body is cylindrical, the two ends of the bag body are circular arcs or flat circles, the two ends of the bag body are respectively provided with the flange (2) and the two hanging rings (3), and one end of the bag body is also provided with the air charging and discharging nozzle (4); the bag body comprises an EPDM outer adhesive layer, a cord or steel wire framework layer which is crossed and paved at an angle of 46-56 degrees, a middle adhesive layer which is formed by combining neoprene and natural adhesive, and a brominated butyl inner adhesive layer which is modified by maleic anhydride suspension grafting; the outer adhesive layer comprises the following components by mass: 100 parts of EPDM, 220 parts of carbon black N, 10 parts of naphthenic oil, 5 parts of zinc oxide, 1 part of SA and 1 to 10 parts of OVP; the maximum size of the air bag is: the diameter phi 4m multiplied by 11m is long; the cord or steel wire framework layer is formed by winding a double-layer cord or steel wire mesh coated with rubber at an angle of 46-56 degrees, and is crossly paved at an angle of 90 degrees, and the double sides of each layer of cord or steel wire mesh are coated with middle rubber; the cord is polyester or nylon; the steel wire layer adopts a 304 stainless steel net; the production process of the long-life high-pressure water shutoff rubber air bag specifically comprises the following production steps: (1) Manufacturing a disposable cylinder mould by using paper pulp, wherein one end of the mould is provided with an air tap hole; (2) plasticating, compounding, mixing and blanking raw rubber; (3) dipping and hanging glue on the framework layer; (4) Sequentially winding an inner adhesive layer, a framework layer, a middle adhesive layer and an outer adhesive layer on a paper mold, and preforming; (5) winding a plurality of layers of water adhesive tapes on the preformed product blank; (6) integral vulcanization; (7) Taking out, dissolving the boiled water adhesive tape, and introducing hot water to remove broken paper pulp; (8) installing end flanges, air nozzles and hanging rings.
2. The process for producing the long-life high-pressure water shutoff rubber air bag according to claim 1, which is characterized in that: the disposable cylinder mould manufactured by paper pulp is specifically: breaking waste paper with shredder, soaking in water to obtain pasty pulp; adhering a layer of paper on the cylinder steel core, wherein one end of the paper is provided with an air tap hole, adding an inner piece of the flange in advance, and pasting pasty paper pulp on the paper; and naturally dehydrating and hardening at room temperature to obtain the cylindrical paper mold with inner flanges at two ends.
3. The process for producing the long-life high-pressure water shutoff rubber air bag according to claim 1, which is characterized in that: the paper-made mould is sequentially wound with an inner adhesive layer, a framework layer, a middle adhesive layer and an outer adhesive layer, and the specific operation is as follows: (1) Forming an inner adhesive layer modified brominated butyl rubber sheet on a paper mold according to the designed thickness, wherein the butt joint parts of the rubber sheets are connected in a slope manner; (2) Winding a plurality of layers of rubberized cords at an angle of 46-56 degrees, crossing the cords at an angle of 90 degrees, and reserving the rubberized cords within 300mm at the two ends of the roller for pre-lapping treatment, wherein each layer of cords is separated by a polypropylene film; (3) The whole middle glue layer film is arranged, and the butt joint of the films is cut with a groove for bonding; (4) And (3) integrally adhering the EPDM outer adhesive layer film, and cutting grooves at the butt joint of the films.
4. The process for producing the long-life high-pressure water shutoff rubber air bag according to claim 1, which is characterized in that: the winding water rubberized fabric is a rubberized fabric protecting bag which is made of a wrapped pressurized water cloth and is worn with the waterproof rubberized fabric.
5. The process for producing the long-life high-pressure water shutoff rubber air bag according to claim 1, which is characterized in that: the integral vulcanization is as follows: pressurizing in vulcanizing tank for 0.6MPa/30min; the pulp mould keeps the internal pressure of 0.63MPa; and after the integral vulcanization is finished, taking out, and removing the boiled water adhesive tape to obtain a product containing the pulp mould, and introducing hot water into the product to remove the crushed pulp.
6. The process for producing the long-life high-pressure water shutoff rubber air bag according to claim 1, which is characterized in that: the end flange consists of an inner flange and an outer flange, and is provided with a lifting ring and a bolt; one of the end flanges is also provided with an air tap.
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| CN111941888B (en) * | 2020-08-10 | 2022-04-12 | 中国人民解放军海军工程大学 | Capsule manufacturing assembly and capsule manufacturing process |
| CN112895244A (en) * | 2021-01-11 | 2021-06-04 | 上海淞江减震器集团有限公司 | Rubber joint vulcanization process |
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