CN110822190B - Waterproof sealing rubber pad with bionic structure and preparation method - Google Patents
Waterproof sealing rubber pad with bionic structure and preparation method Download PDFInfo
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- CN110822190B CN110822190B CN201911290665.XA CN201911290665A CN110822190B CN 110822190 B CN110822190 B CN 110822190B CN 201911290665 A CN201911290665 A CN 201911290665A CN 110822190 B CN110822190 B CN 110822190B
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 362
- 238000007789 sealing Methods 0.000 title claims abstract description 128
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 175
- 239000002245 particle Substances 0.000 claims description 45
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 30
- 239000011593 sulfur Substances 0.000 claims description 30
- 229910052717 sulfur Inorganic materials 0.000 claims description 30
- 150000001875 compounds Chemical class 0.000 claims description 26
- 239000006229 carbon black Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 21
- MHKLKWCYGIBEQF-UHFFFAOYSA-N 4-(1,3-benzothiazol-2-ylsulfanyl)morpholine Chemical group C1COCCN1SC1=NC2=CC=CC=C2S1 MHKLKWCYGIBEQF-UHFFFAOYSA-N 0.000 claims description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 20
- 230000000630 rising effect Effects 0.000 claims description 15
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 10
- 239000011358 absorbing material Substances 0.000 claims description 10
- 230000003712 anti-aging effect Effects 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 10
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 10
- 229920000728 polyester Polymers 0.000 claims description 10
- 239000008117 stearic acid Substances 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 239000000314 lubricant Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 5
- 238000005187 foaming Methods 0.000 claims description 5
- 239000004088 foaming agent Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims 2
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 244000043261 Hevea brasiliensis Species 0.000 description 9
- 229920000459 Nitrile rubber Polymers 0.000 description 9
- 229920003052 natural elastomer Polymers 0.000 description 9
- 229920001194 natural rubber Polymers 0.000 description 9
- 230000008961 swelling Effects 0.000 description 7
- 238000003491 array Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000001968 nicotinic acid Nutrition 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Classifications
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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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
- F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
-
- 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
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- 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
- B32B2307/54—Yield strength; Tensile strength
-
- 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
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to the technical field of rubber pads, in particular to a waterproof sealing rubber pad with a bionic structure, which consists of a common sealing rubber unit and a water expansion rubber unit, wherein the water expansion rubber unit comprises a first water expansion rubber unit, a second water expansion rubber unit, a third water expansion rubber unit, a fourth water expansion rubber unit and a fifth water expansion rubber unit, the first common sealing rubber unit, the first water expansion rubber unit, the second common sealing rubber unit and the fifth water expansion rubber unit are of annular structures which are sequentially nested from outside to inside, and the second water expansion rubber unit, the third water expansion rubber unit and the fourth water expansion rubber unit are of annular structures which are embedded in the second common sealing rubber unit from outside to inside. The rubber pad designed by the invention has the compression resistance and tensile resistance of common sealing rubber, and also has the good waterproof performance of water expansion rubber, thereby improving the comprehensive performance of the rubber pad.
Description
Technical Field
The invention relates to the technical field of rubber gaskets, in particular to a waterproof sealing rubber gasket with a bionic structure and a preparation method thereof.
Background
In water supply and drainage pipelines, particularly on flanges of pipelines and pipeline connecting parts, sealing rubber rings or rubber gaskets are often arranged, along with the continuous increase of building height and continuous improvement of living standard, the water consumption of people is increased year by year, so that the pipeline pressure is enhanced, when the pipeline is displaced, a gap is formed at the pipeline connecting position by the sealing gasket in the existing market, the sealing rubber rings lose the water-stopping sealing effect, water leakage is caused, and the single water expansion rubber gasket has excellent waterproof performance but insufficient pressure bearing strength.
Bionics is a science that mimics biology, i.e., studies on characteristics of a biological system such as structure, material, function, energy conversion, information control, etc., and applies it to a technical system to improve existing technical engineering equipment, create new technological processes, building configurations, automation devices, etc., and its task is to study the excellent ability of a biological system and model it, and then apply these principles to design and manufacture new technical equipment. In recent years, bionics is greatly colorful in various fields, shells have a multi-layer composite structure, softness and hardness are alternated, and pressure resistance is extremely strong, so that a new thought is provided for the design invention.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a waterproof sealing rubber pad with a bionic structure and a preparation method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the waterproof sealing rubber pad with the bionic structure comprises a common sealing rubber unit and a water expansion rubber unit, wherein the common sealing rubber unit comprises a first common sealing rubber unit and a second common sealing rubber unit, the water expansion rubber unit comprises a first water expansion rubber unit, a second water expansion rubber unit, a third water expansion rubber unit, a fourth water expansion rubber unit and a fifth water expansion rubber unit, the first common sealing rubber unit, the first water expansion rubber unit, the second common sealing rubber unit and the fifth water expansion rubber unit are of annular structures which are sequentially nested from outside to inside, and the second water expansion rubber unit, the third water expansion rubber unit and the fourth water expansion rubber unit are of annular structures which are embedded in the second common sealing rubber unit from outside to inside;
the water-swelling rubber unit is prepared from the following raw materials in parts by weight: water-swellable rubber: 100 parts; water absorbing material: 5-8 parts of a lubricant; composite carbon black: 40-80 parts; white carbon black: 5-15 parts; silane coupling agent: 0.5-1.5 parts; stearic acid: 4-8 parts of a lubricant; an anti-aging agent: 1-2 parts; scorch retarder CTP:0.15-0.2 part; zinc oxide: 6-10 parts; accelerator NOBS:2-3 parts; accelerator DTDM:0.1-0.3 part; sulfur: 1-3 parts;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts; high wear resistant carbon black: 40-80 parts; white carbon black: 15-30 parts of a lubricant; silane coupling agent: 1.5-3 parts; stearic acid: 2-8 parts; anti-aging agent 4020:3-5 parts; scorch retarder CTP:0.15-0.2 part; zinc oxide: 4-10 parts of a lubricant; accelerator NOBS:2-3 parts; accelerator DTDM:0.1-0.3 part; sulfur: 1-3 parts.
Further, the second water-swelling rubber unit is formed by a plurality of second water-swelling rubber particle uniform annular arrays, the fourth water-swelling rubber unit is formed by a plurality of fourth water-swelling rubber particle annular uniform annular arrays, and the third water-swelling rubber unit is formed by a plurality of third water-swelling rubber particle uniform annular arrays.
Further, the water absorbing material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio is 5:4:1, the length of the polyacrylonitrile fiber is 1-3mm, and the length of the polyester fiber is 1-3mm.
Further, the first common sealing rubber unit, the second common sealing rubber unit, the first water expansion rubber unit, the second water expansion rubber unit, the third water expansion rubber unit, the fourth water expansion rubber unit and the fifth water expansion rubber unit are distributed annularly and are coaxial, and the thickness h2 of the water expansion rubber units is 1-20mm.
Further, the cross section of the second water expansion rubber particles is of an oval structure, the distances from the centers of the ellipses to the public circle center are equal, the long side b2 of the ellipses is 2-8mm, the short side a2 is 1-4mm, the distance L2 between the centers of two adjacent ellipses is 5-30mm, and the shortest distance d2 between the centers of the ellipses and the inner wall of the first water expansion rubber unit is 1-10mm.
Further, the cross section of the third water expansion rubber particles is of a circular structure, the radius r of the circle is 2-6mm, the distances from the circle centers of the circles to the public circle center are equal, the number of the third water expansion rubber particles is equal to that of the second water expansion rubber particles, and the vertical distances from the circle centers to the inner wall of the second common sealing rubber unit are equal.
Further, the cross section of the fourth water expansion rubber particles is of an oval structure, the long side b1 of the oval structure where the fourth water expansion rubber particles are located is 2-8mm, the short side a1 is 1-4mm, the distance L1 between two adjacent oval centers is 5-30mm, and the shortest distance d1 between the adjacent oval centers and the outer ring of the fifth water expansion rubber unit is 1-10mm.
Further, the thickness h1 of the first common sealing rubber unit and the second common sealing rubber unit is h2+2mm.
Further, the difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 2-20mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water expansion unit is 2-20mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 5-30mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water expansion rubber unit is 2-20mm.
The shape of the second water expansion rubber particles is the same as that of the fourth water expansion rubber particles, so that the second water expansion rubber units, the third water expansion rubber units and the fourth water expansion rubber units in the second common sealing rubber unit are complementary in structure.
The first common sealing rubber unit, the first water expansion rubber unit, the second common sealing rubber unit and the fifth water expansion rubber unit form structural complementation;
the preparation method of the waterproof sealing rubber pad with the bionic structure is used for preparing the waterproof sealing rubber pad with the bionic structure and comprises the following steps of:
firstly, preparing a common sealing rubber unit sizing material, controlling the rotor speed of an internal mixer to be 40-80RPM, controlling the temperature to be 130-150 ℃ and controlling the upper ram pressure to be 30-50N/CM2.
(1) Adding wear-resistant rubber to press the top plug, and plasticating for 120-180 seconds in an internal mixer;
(2) Adding other materials except accelerator, sulfur and foaming agent into the rising bolt, and pressing the rising bolt for 120-180 seconds;
(3) After the prepared rubber compound is cooled by air for 1-2 hours, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be operated for 8-15 times at the temperature of 60-75 ℃.
(4) And (3) air-cooling the prepared rubber compound for 2-4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, the open mill is operated for 8-15 times, the thickness of a formed rubber sheet is 1-10mm, and the rubber sheet is placed for 12-24 hours at room temperature after the forming for later use.
And secondly, preparing the water-swelling rubber unit sizing material, wherein the rotor speed of the internal mixer is controlled to be 40-80RPM, the temperature is controlled to be 130-150 ℃, and the upper ram pressure is controlled to be 30-50N/CM2.
(1) Adding foaming rubber to press a top bolt, and plasticating for 120-180 seconds in an internal mixer;
(2) Adding other materials except accelerator and sulfur into the rising top bolt, and pressing the top bolt for 120-180 seconds;
(3) After the prepared rubber compound is cooled by air for 1-2 hours, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the open mill is required to be operated for 8-15 times at the temperature of 60-75 ℃.
(4) And (3) air-cooling the prepared rubber compound for 2-4 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, the open mill is operated for 8-15 times, the thickness of a formed rubber sheet is 5-10mm, and the rubber sheet is placed for 12-24 hours at room temperature after the forming for later use.
And thirdly, the common sealing rubber and the water expansion rubber prepared in the first step and the second step are subjected to compression molding and combination according to the respective structural shapes, then are put into a mold for pressurizing 5-20MP, are heated to 130-150 ℃ for 10-30 minutes, and are subjected to water cooling for 30 minutes to prepare the rubber.
The waterproof sealing rubber pad with the bionic structure has the beneficial effects that: the rubber pad is designed by adopting the compression-resistant principle of the deep sea shell, is designed into a soft and hard combined sealing pad structure, and is embedded with round particles and oval particles in the rubber pad, so that the purposes of compression resistance and water resistance are achieved.
Drawings
Fig. 1 is a schematic front view of a waterproof sealing rubber pad with a bionic structure according to the present invention;
fig. 2 is a schematic view of a longitudinal section H-H of a waterproof sealing rubber pad with a bionic structure according to the present invention.
In the figure: A. a first ordinary sealing rubber unit, B, a first water expansion rubber unit, C, a second ordinary sealing rubber unit, D, a second water expansion rubber unit, E, a third water expansion rubber unit, F, a fourth water expansion rubber unit, G, a fifth water expansion rubber unit, R1, an inner ring radius of the fifth water expansion rubber unit, R2, an outer ring radius of the fifth water expansion rubber unit or an inner ring radius of the second ordinary sealing rubber unit, R3, an inner ring radius of the first water expansion rubber unit or an inner ring radius of the first ordinary sealing rubber unit, R4, an outer ring radius of the first water expansion rubber unit or an inner ring radius of the first ordinary sealing rubber unit, R5, an outer ring radius of the first ordinary sealing rubber unit, L1, a distance between oval center points of two adjacent fourth water expansion rubber particles, L2, distances between the center points of ellipses of two adjacent second water expansion rubber particles, L3 and L4, the closest distance between the center points of the second water expansion rubber particles and the centers of ellipses of two adjacent third water expansion rubber particles, a1, the shorter sides of the ellipses of the fourth water expansion rubber particles, B1, the longer sides of the ellipses of the fourth water expansion rubber particles, a2, the shorter sides of the ellipses of the second water expansion rubber particles, B1, the longer sides of the ellipses of the second water expansion rubber particles, D1, the closest distance between the inner rings of the fifth water expansion rubber units and the edges of the fourth water expansion rubber particles, D2, the closest distance between the inner rings of the first water expansion rubber units and the edges of the ellipses of the third water expansion rubber particles, h1, the thickness of the common sealing rubber, h2, the thickness difference between the upper surfaces of the common sealing rubber and the upper surfaces of the water expansion rubber, k2, the thickness difference between the lower surface of the general sealing rubber and the lower surface of the water swelling rubber.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1: referring to fig. 1-2, the waterproof sealing rubber pad with the bionic structure in the embodiment comprises a first common sealing rubber unit a and a second common sealing rubber unit C, wherein the water expansion rubber units comprise a first water expansion rubber unit B, a second water expansion rubber unit D, a third water expansion rubber unit E, a fourth water expansion rubber unit F and a fifth water expansion rubber unit G, the first common sealing rubber unit a, the first water expansion rubber unit B, the second common sealing rubber unit C and the fifth water expansion rubber unit G are in an annular structure which is sequentially nested from outside to inside, and the second water expansion rubber unit D, the third water expansion rubber unit E and the fourth water expansion rubber unit F are in an annular structure which is embedded in the second common sealing rubber unit C from outside to inside;
the second water-swelling rubber unit D is formed by a plurality of second water-swelling rubber particle uniform annular arrays, the fourth water-swelling rubber unit F is formed by a plurality of fourth water-swelling rubber particle annular uniform annular arrays, and the third water-swelling rubber unit E is formed by a plurality of third water-swelling rubber particle uniform annular arrays.
The first common sealing rubber unit A, the second common sealing rubber unit C, the first water expansion rubber unit B, the second water expansion rubber unit D, the third water expansion rubber unit E, the fourth water expansion rubber unit F and the fifth water expansion rubber unit G are distributed in an annular mode and are coaxial, the intersection point of the cross section of the first common sealing rubber unit A, the second common sealing rubber unit C, the first water expansion rubber unit B, the second water expansion rubber unit D, the third water expansion rubber unit E, the fourth water expansion rubber unit F and the fifth water expansion rubber unit G is a common circle center, and the thickness h2 of the water expansion rubber units is 13mm.
The cross section of second water swelling rubber granule is oval structure, oval center reaches public centre of a circle the distance equal, oval long limit B2 is 4mm, and minor face a2 is 1mm, and distance L2 between two adjacent oval centers is 5mm, oval center is 1mm apart from the nearest distance d2 of first water swelling rubber unit B inner wall.
The cross section of the third water expansion rubber particles is of a circular structure, the radius r of the circle is 2mm, the distances from the circle centers of the circles to the public circle center are equal, the number of the third water expansion rubber particles is equal to that of the second water expansion rubber particles, the distances from the circle centers to the centers of two adjacent ellipses are equal, namely L3=L4, and the vertical distances from the circle centers to the inner wall of the second common sealing rubber unit C are equal.
The cross section of the fourth water expansion rubber particles is of an oval structure, the distance from the center of the oval where the fourth water expansion rubber particles are located to the public circle center is equal, the long side b1 of the oval structure where the fourth water expansion rubber particles are located is 4mm, the short side a1 of the oval structure is 1mm, the distance L1 between two adjacent oval centers is 5mm, and the nearest distance d1 between the oval centers and the outer ring of the fifth water expansion rubber unit G is 1mm.
The difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 3mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water expansion unit is 2mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 6mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water expansion rubber unit is 2mm.
In deep sea, some deep sea shells have wavy outer surfaces, and shells of the shells alternate from inside to outside, because the deep sea shells are always subjected to great seawater pressure when living in hundreds of meters or even thousands of meters, and the wavy geometric surface and inner soft and hard alternate structure can enable the shells to bear greater compressive strength at the same thickness, and the structure is gradually formed through evolution for hundreds of millions of years and is quite scientific and reasonable in stress. The soft and hard alternate sealing rubber pad structure is designed, and the surface is formed by circles and ellipses with different rules and depths, so that the purposes of compression resistance and water resistance are achieved.
Proper non-smooth treatment of sealing surfaces is a development direction of future mechanical sealing elements, in order to increase bearing capacity and oil film rigidity between sealing elements and reduce friction and abrasion, etsion I and Burstein L in 1996 propose sealing element models with regular non-smooth surface structures, and when hemispherical micro pits are uniformly distributed on one sealing surface, sealing performance is greatly improved. According to this principle, circular and oval pit structures are added on the surface of the sealing rubber pad, so that the sealing effect is very good.
The water-swellable rubber unit of this example was prepared from the following raw materials in parts by weight: water-swellable rubber: 100 parts; water absorbing material: 5 parts; composite carbon black: 40 parts; white carbon black: 5 parts; silane coupling agent: 0.5 parts; stearic acid: 4 parts; an anti-aging agent: 1 part; scorch retarder CTP:0.15 parts; zinc oxide: 6 parts; accelerator NOBS:2 parts; accelerator DTDM:0.1 part; sulfur: 1 part;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts; high wear resistant carbon black: 40 parts; white carbon black: 15 parts; silane coupling agent: 1.5 parts; stearic acid: 2 parts; anti-aging agent 4020:3 parts; scorch retarder CTP:0.15 parts; zinc oxide: 4 parts; accelerator NOBS:2 parts; accelerator DTDM:0.1 part; sulfur: 1 part.
The water-swelling rubber consists of natural rubber, nitrile rubber and water-absorbent resin, and the mass ratio of the water-swelling rubber to the water-absorbent resin is 4:4:2.
the water absorbing material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio is 5:4:1, the length of the polyacrylonitrile fiber is 1mm, and the length of the polyester fiber is 1mm.
The composite carbon black consists of N774, N660, N330 and N234, and the mass ratio is 3:3:3:1.
the common sealing rubber consists of nitrile rubber, natural rubber and chloroprene rubber, and the mass ratio of the nitrile rubber to the natural rubber is 6:3:1.
Is composed of N774, N660, N330 and N234, and the mass ratio is 5:2:2:1.
the preparation method of the waterproof sealing rubber pad with the bionic structure comprises the following steps:
and firstly, preparing a common sealing rubber unit sizing material, wherein the rotor speed of an internal mixer is controlled to be 40RPM, the temperature is 130 ℃, and the upper ram pressure is 30N/CM2.
(1) Adding foaming rubber to press a top plug, and plasticating for 120 seconds in an internal mixer;
(2) Adding other materials except accelerator, sulfur and foaming agent into the rising bolt, and pressing the rising bolt for 120 seconds;
(3) After the prepared rubber compound is cooled for 1 hour by air, an accelerator NOBS and an accelerator DTDM are added on an open mill, and the temperature of the open mill is required to be 60 ℃ and the open mill is required to be operated for 8 times.
(4) After the prepared rubber compound is cooled by air for 2 hours, sulfur is added into an open mill, the temperature of the open mill is required to be 60 ℃, the open mill is operated for 8 times, and the rubber compound is placed for 12 hours at room temperature after molding for standby.
And secondly, preparing the sizing material of the water-swelling rubber unit, wherein the rotor speed of the internal mixer is controlled to be 40RPM, the temperature is 130 ℃, and the upper ram pressure is 30N/CM2.
(1) Adding wear-resistant rubber to press the top plug, and plasticating for 120 seconds in an internal mixer;
(2) Adding other materials except accelerator and sulfur into the rising top bolt, and pressing the top bolt for 120 seconds;
(3) After the prepared rubber compound is cooled for 1 hour by air, an accelerator NOBS and an accelerator DTDM are added on an open mill, and the temperature of the open mill is required to be 60 ℃ and the open mill is required to be operated for 8 times.
(4) After the prepared rubber compound is cooled by air for 2 hours, sulfur is added into an open mill, the temperature of the open mill is required to be 75 ℃, the open mill is operated for 8 times, and the rubber compound is placed for 12 hours at room temperature after molding for standby.
And thirdly, the common sealing rubber and the water expansion rubber prepared in the first step and the second step are subjected to compression molding and combination according to the respective structural shapes, then are put into a mold to be pressurized for 5MP, heated to 130 ℃ for 40 minutes, and are subjected to water cooling for 30 minutes to prepare the rubber.
Example 2: the difference between the waterproof sealing rubber pad with the bionic structure and the embodiment 1 is that: the weight fractions of the components are as follows: water-swellable rubber: 100 parts; water absorbing material: 7 parts; composite carbon black: 60 parts; white carbon black: 10 parts; silane coupling agent: 1 part; stearic acid: 6 parts; an anti-aging agent: 1.5 parts; scorch retarder CTP:0.17 parts; zinc oxide: 8 parts; accelerator NOBS:2.5 parts; accelerator DTDM:0.2 parts; sulfur: 2 parts; the common sealing rubber unit comprises the following components in parts by weight: ordinary sealing rubber: 100 parts; high wear resistant carbon black: 60 parts; white carbon black: 23 parts; silane coupling agent: 2.2 parts; stearic acid: 5 parts; anti-aging agent 4020:4 parts; scorch retarder CTP:0.18 parts; zinc oxide: 7 parts; accelerator NOBS:2.5 parts; accelerator DTDM:0.2 parts; sulfur: 2 parts.
The water-swelling rubber consists of natural rubber, nitrile rubber and water-absorbent resin, and the mass ratio of the water-swelling rubber is 4:4:2.
the water absorbing material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio is 5:4:1, the length of the polyacrylonitrile fiber is 2mm, and the length of the polyester fiber is 2mm.
The composite carbon black consists of N774, N660, N330 and N234, and the mass ratio is 3:3:3:1.
the common sealing rubber consists of nitrile rubber, natural rubber and chloroprene rubber, and the mass ratio of the nitrile rubber to the natural rubber is 6:3:1.
Is composed of N774, N660, N330 and N234, and the mass ratio is 5:2:2:1.
the invention also provides a preparation method of the waterproof sealing rubber pad with the bionic structure, which comprises the following steps:
and firstly, preparing a rubber material of a common sealing rubber unit, controlling the rotor speed of an internal mixer to be 60RPM, controlling the temperature to be 140 ℃, and controlling the upper ram pressure to be 40N/CM2.
(1) Adding foaming rubber to press a top plug, and plasticating for 160 seconds in an internal mixer;
(2) Adding other materials except accelerator, sulfur and foaming agent into the rising bolt, and keeping the rising bolt for 160 seconds;
(3) After the prepared rubber compound is cooled for 1.5 hours by air, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the temperature of the open mill is required to be 68 ℃ and the open mill is operated for 11 times.
(4) After the prepared rubber compound is air-cooled for 3 hours, sulfur is added into an open mill, the temperature of the open mill is required to be 80 ℃, the open mill is operated for 11 times, and the rubber compound is formed and then placed at room temperature for 18 hours for standby.
And secondly, preparing the sizing material of the water expansion rubber unit, wherein the rotor speed of the internal mixer is controlled to be 60RPM, the temperature is 140 ℃, and the upper ram pressure is 40N/CM2.
(1) Adding wear-resistant rubber to press the top plug, and plasticating for 160 seconds in an internal mixer;
(2) Adding other materials except accelerator and sulfur into the rising top bolt, and pressing the top bolt for 160 seconds;
(3) After the prepared rubber compound is cooled for 1.5 hours by air, an accelerator NOBS and an accelerator DTDM are added into an open mill, and the temperature of the open mill is required to be 68 ℃ and the open mill is operated for 11 times.
(4) And (3) air-cooling the prepared rubber compound for 2.5 hours, adding sulfur into an open mill, wherein the temperature of the open mill is required to be 68 ℃, the open mill is operated for 11 times, and the formed rubber compound is placed at room temperature for 18 hours for later use.
And thirdly, the common sealing rubber and the water expansion rubber prepared in the first step and the second step are subjected to compression molding and combination according to the respective structural shapes, then are put into a mold to be pressurized for 12MP, heated to 140 ℃ for 20 minutes, and are subjected to water cooling for 30 minutes to prepare the rubber.
Example 3, this example differs from example 1 in that the water-swellable rubber unit is prepared from the following raw materials in parts by weight: water-swellable rubber: 100 parts; water absorbing material: 8 parts; composite carbon black: 80 parts; white carbon black: 15 parts; silane coupling agent: 1.5 parts; stearic acid: 8 parts; an anti-aging agent: 2 parts; scorch retarder CTP:0.2 parts; zinc oxide: 10 parts; accelerator NOBS:3 parts; accelerator DTDM:0.3 parts; sulfur: 3 parts;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts; high wear resistant carbon black: 80 parts; white carbon black: 30 parts; silane coupling agent: 3 parts; stearic acid: 8 parts; anti-aging agent 4020:5 parts; scorch retarder CTP:0.2 parts; zinc oxide: 10 parts; accelerator NOBS:3 parts; accelerator DTDM:0.3 parts; sulfur: 3 parts.
The water-swelling rubber consists of natural rubber, nitrile rubber and water-absorbent resin, and the mass ratio of the water-swelling rubber is 4:4:2.
the water absorbing material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio is 5:4:1, the length of the polyacrylonitrile fiber is 3mm, and the length of the polyester fiber is 3mm.
The composite carbon black consists of N774, N660, N330 and N234, and the mass ratio is 3:3:3:1.
the common sealing rubber consists of nitrile rubber, natural rubber and chloroprene rubber, and the mass ratio of the nitrile rubber to the natural rubber is 6:3:1. The high wear-resistant carbon black consists of N774, N660, N330 and N234, and the mass ratio is 5:2:2:1.
the preparation method of the waterproof sealing rubber pad with the bionic structure comprises the following steps:
and firstly, preparing a rubber material of a common sealing rubber unit, controlling the rotor speed of an internal mixer to be 80RPM, controlling the temperature to be 150 ℃ and controlling the upper ram pressure to be 50N/CM2.
(1) Adding foaming rubber to press a top bolt, and plasticating for 180 seconds in an internal mixer;
(2) Adding other materials except accelerator, sulfur and foaming agent into the rising bolt, and pressing the rising bolt for 180 seconds;
(3) After the prepared rubber compound is cooled for 2 hours by air, an accelerator NOBS and an accelerator DTDM are added on an open mill, and the temperature of the open mill is required to be 75 ℃, and the open mill is operated for 15 times.
(4) After the prepared rubber compound is air-cooled for 4 hours, sulfur is added into an open mill, the temperature of the open mill is required to be 75 ℃, the open mill is operated for 15 times, and the rubber compound is placed for 24 hours at room temperature after molding for standby.
And secondly, preparing the sizing material of the water-swelling rubber unit, wherein the rotor speed of the internal mixer is controlled to be 80RPM, the temperature is 150 ℃, and the upper ram pressure is 50N/CM2.
(1) Adding wear-resistant rubber to press the top plug, and plasticating for 180 seconds in an internal mixer;
(2) Adding other materials except accelerator and sulfur into the rising top bolt, and pressing the top bolt for 180 seconds;
(3) After the prepared rubber compound is cooled for 2 hours by air, an accelerator NOBS and an accelerator DTDM are added on an open mill, and the temperature of the open mill is required to be 75 ℃, and the open mill is operated for 15 times.
(4) After the prepared rubber compound is air-cooled for 4 hours, sulfur is added into an open mill, the temperature of the open mill is required to be 75 ℃, the open mill is operated for 15 times, and the rubber compound is placed for 24 hours at room temperature after molding for standby.
And thirdly, the common sealing rubber and the water expansion rubber prepared in the first step and the second step are subjected to compression molding and combination according to the respective structural shapes, then are put into a mold to be pressurized for 20MP, heated for 15 minutes at 150 ℃, and are subjected to water cooling for 15 minutes to prepare the rubber.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Comparative example 1: the difference between the comparative example and the example 1 is that the waterproof sealing rubber pad with the bionic structure is prepared by adopting the common rubber described in the example 1.
Comparative example 2: the comparative example is different from example 1 in that the waterproof sealing rubber pad with the bionic structure is prepared by adopting the water expansion rubber described in example 1.
Table 1 shows the specific measurement parameters of the sample of the gasket for each example:
| comparative example 1 | Comparative example 2 | Example 1 | Example 2 | Example 3 | |
| Tensile strength MPa | 19.2 | 10.5 | 24.2 | 22.5 | 21.1 |
| Elongation at break% | 296 | 217 | 345 | 358 | 398 |
| Bear the water pressure MPa | 0.3 | 0.6 | 1.0 | 0.8 | 0.5 |
| Various performances of the alloy are reduced by 48 h after aging at 80 DEG C | 35-40 | 37-43 | 8-12% | 9-15% | 12-19% |
Example 4: the present embodiment differs from embodiment 1 in that the thickness h2 of the water-swellable rubber unit is 8mm. The cross section of second water swelling rubber granule is oval structure, oval center reaches the distance of public centre of a circle equal, oval long limit B2 is 3mm, and minor face a2 is 2mm, and distance L2 between two adjacent oval centers is 6mm, oval center is 2mm apart from the nearest distance d2 of first water swelling rubber unit B inner wall. The cross section of the third water expansion rubber particles is of a circular structure, the radius r of the circle is 3mm, the long side b1 of the oval structure where the fourth water expansion rubber particles are located is 3mm, the short side a1 is 2mm, the distance L1 between two adjacent oval centers is 6mm, and the nearest distance d1 between the adjacent oval centers and the outer ring of the fifth water expansion rubber unit G is 2mm.
The difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 9mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water expansion unit is 6mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 18mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water expansion rubber unit is 6mm.
Example 5, this example differs from example 1 in that the thickness h2 of the water-swellable rubber unit is 20mm.
The cross section of second water swelling rubber granule is oval structure, oval center reaches the distance of public centre of a circle equal, oval long limit B2 is 6mm, and minor face a2 is 3mm, and distance L2 between two adjacent oval centers is 8mm, oval center is 3mm apart from the nearest distance d2 of first water swelling rubber unit B inner wall.
The cross section of the third water expansion rubber particles is of a circular structure, the radius r of the circle is 4mm, the long side b6 of the oval structure where the fourth water expansion rubber particles are located is 4mm, the short side a1 is 3mm, the distance L1 between two adjacent oval centers is 8mm, and the nearest distance d1 between the adjacent oval centers and the outer ring of the fifth water expansion rubber unit G is 3mm.
The difference between the outer ring radius R5 and the inner ring radius R4 of the first common sealing rubber unit is 10mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water expansion unit is 8mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second common sealing rubber unit is 26mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water expansion rubber unit is 8mm.
Table 2 shows the specific measurement parameters of the sample of the gasket for each example: .
| Example 1 | Example 4 | Example 5 | |
| Tensile strength MPa | 24.2 | 23.2 | 22.8 |
| Elongation at break% | 367 | 370 | 384 |
| Bear the water pressure MPa | 1.0 | 0.8 | 0.6 |
| Various performances of the alloy are reduced by 48 h after aging at 80 DEG C | 9-11% | 10-15% | 12-16% |
The waterproof sealing rubber pad with the composite structure has the compression resistance and tensile resistance of common sealing rubber, and also has the good waterproof performance of water expansion rubber, so that the comprehensive performance is obviously improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The waterproof sealing rubber pad with the bionic structure is characterized by comprising a common sealing rubber unit and a water expansion rubber unit, wherein the common sealing rubber unit comprises a first common sealing rubber unit (A) and a second common sealing rubber unit (C), the water expansion rubber unit comprises a first water expansion rubber unit (B), a second water expansion rubber unit (D), a third water expansion rubber unit (E), a fourth water expansion rubber unit (F) and a fifth water expansion rubber unit (G), the first common sealing rubber unit (A), the first water expansion rubber unit (B), the second common sealing rubber unit (C) and the fifth water expansion rubber unit (G) are of annular structures which are sequentially nested from outside to inside, and the second water expansion rubber unit (D), the third water expansion rubber unit (E) and the fourth water expansion rubber unit (F) are of annular structures which are embedded in the second common sealing rubber unit (C) from outside to inside;
the water-swelling rubber unit is prepared from the following raw materials in parts by weight: water-swellable rubber: 100 parts; water absorbing material: 5-8 parts of a lubricant; composite carbon black: 40-80 parts; white carbon black: 5-15 parts; silane coupling agent: 0.5-1.5 parts; stearic acid: 4-8 parts of a lubricant; an anti-aging agent: 1-2 parts; scorch retarder CTP:0.15-0.2 part; zinc oxide: 6-10 parts; accelerator NOBS:2-3 parts; accelerator DTDM:0.1-0.3 part; sulfur: 1-3 parts;
the common sealing rubber unit is prepared from the following raw materials in parts by weight: ordinary sealing rubber: 100 parts; high wear resistant carbon black: 40-80 parts; white carbon black: 15-30 parts of a lubricant; silane coupling agent: 1.5-3 parts; stearic acid: 2-8 parts; anti-aging agent 4020:3-5 parts; scorch retarder CTP:0.15-0.2 part; zinc oxide: 4-10 parts of a lubricant; accelerator NOBS:2-3 parts; accelerator DTDM:0.1-0.3 part; sulfur: 1-3 parts.
2. The waterproof sealing rubber pad of a bionic structure according to claim 1, wherein the second water-swelling rubber unit (D) is formed by a plurality of second water-swelling rubber particles in a uniform annular array, the fourth water-swelling rubber unit (F) is formed by a plurality of fourth water-swelling rubber particles in a uniform annular array, and the third water-swelling rubber unit (E) is formed by a plurality of third water-swelling rubber particles in a uniform annular array.
3. The waterproof sealing rubber gasket with the bionic structure according to claim 1, wherein the water absorbing material consists of nano starch essence, polyacrylonitrile fiber and polyester fiber, and the mass ratio is 5:4:1, the length of the polyacrylonitrile fiber is 1-3mm, and the length of the polyester fiber is 1-3mm.
4. The waterproof sealing rubber pad with the bionic structure according to claim 1, wherein the first common sealing rubber unit (a), the second common sealing rubber unit (C), the first water expansion rubber unit (B), the second water expansion rubber unit (D), the third water expansion rubber unit (E), the fourth water expansion rubber unit (F) and the fifth water expansion rubber unit (G) are annularly distributed and coaxial, and the thickness h2 of the water expansion rubber units is 1-20mm.
5. The waterproof sealing rubber pad with a bionic structure according to claim 2, wherein the cross section of the second water-swelling rubber particles is in an elliptic structure, the distances from the centers of the ellipses to the public circle center are equal, the long side B2 of the ellipse is 2-8mm, the short side a2 of the ellipse is 1-4mm, the distance L2 between the centers of two adjacent ellipses is 5-30mm, and the nearest distance d2 between the centers of the ellipse and the inner wall of the first water-swelling rubber unit (B) is 1-10mm.
6. The waterproof sealing rubber gasket with the bionic structure according to claim 2, wherein the cross section of the third water expansion rubber particles is of a circular structure, the radius r of the circle is 2-6mm, the distances from the center of each circle to the common center are equal, the number of the third water expansion rubber particles is equal to the number of the second water expansion rubber particles, and the vertical distances from the center of the circle to the inner wall of the second common sealing rubber unit (C) are equal.
7. The waterproof sealing rubber pad with the bionic structure according to claim 2, wherein the cross section of the fourth water expansion rubber particles is an oval structure, the long side b1 of the oval structure where the fourth water expansion rubber particles are located is 2-8mm, the short side a1 is 1-4mm, the distance L1 between the centers of two adjacent ellipses is 5-30mm, and the nearest distance d1 from the outer ring of the fifth water expansion rubber unit (G) is 1-10mm.
8. The waterproof sealing rubber gasket of a bionic structure according to claim 4, wherein the thickness h1 of the first and second common sealing rubber units (a, C) is h2+2mm.
9. The waterproof sealing rubber gasket of a bionic structure according to claim 1, wherein the difference between the outer ring radius R5 and the inner ring radius R4 of the first ordinary sealing rubber unit is 2-20mm, the difference between the outer ring radius R4 and the inner ring radius R3 of the first water expansion unit is 2-20mm, the difference between the outer ring radius R3 and the inner ring radius R2 of the second ordinary sealing rubber unit is 5-30mm, and the difference between the outer ring radius R2 and the inner ring radius R1 of the fifth water expansion rubber unit is 2-20mm.
10. A method for preparing the waterproof sealing rubber gasket with a bionic structure, which is used for preparing the waterproof sealing rubber gasket with a bionic structure according to any one of claims 1 to 9, and is characterized by comprising the following steps:
firstly, preparing a common sealing rubber unit sizing material, controlling the rotor speed of an internal mixer to be 40-80RPM, controlling the temperature to be 130-150 ℃ and controlling the upper ram pressure to be 30-50N/CM2;
(1) Adding wear-resistant rubber to press the top plug, and plasticating for 120-180 seconds in an internal mixer;
(2) Adding other materials except accelerator, sulfur and foaming agent into the rising bolt, and pressing the rising bolt for 120-180 seconds;
(3) After the prepared rubber compound is cooled for 1-2 hours by air, adding an accelerator NOBS and an accelerator DTDM on an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, and the open mill is operated for 8-15 times;
(4) Cooling the prepared rubber compound for 2-4 hours by air, adding sulfur on an open mill, requiring the temperature of the open mill to be 60-75 ℃, conducting open milling for 8-15 times, and standing for 12-24 hours at room temperature after molding for later use;
secondly, preparing a water-swelling rubber unit sizing material, wherein the rotor speed of the internal mixer is controlled to be 40-80RPM, the temperature is 130-150 ℃, and the upper bolt pressure is 30-50N/CM2;
(1) Adding foaming rubber to press a top bolt, and plasticating for 120-180 seconds in an internal mixer;
(2) Adding other materials except accelerator and sulfur into the rising top bolt, and pressing the top bolt for 120-180 seconds;
(3) After the prepared rubber compound is cooled for 1-2 hours by air, adding an accelerator NOBS and an accelerator DTDM on an open mill, wherein the temperature of the open mill is required to be 60-75 ℃, and the open mill is operated for 8-15 times;
(4) Cooling the prepared rubber compound for 2-4 hours by air, adding sulfur on an open mill, requiring the temperature of the open mill to be 60-75 ℃, conducting open milling for 8-15 times, and standing for 12-24 hours at room temperature after molding for later use;
and thirdly, the common sealing rubber and the water expansion rubber prepared in the first step and the second step are subjected to compression molding and combination according to the respective structural shapes, then are put into a mold for pressurizing 5-20MP, are heated to 130-150 ℃ for 10-30 minutes, and are subjected to water cooling for 30 minutes to prepare the rubber.
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| JPH07138413A (en) * | 1993-11-15 | 1995-05-30 | Nitto Kako Kk | Water-swellable rubber composition and water-swellable rubber waterstop material |
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