CN116983725B - High-strength filter plate and preparation method thereof - Google Patents
High-strength filter plate and preparation method thereof Download PDFInfo
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- CN116983725B CN116983725B CN202311261442.7A CN202311261442A CN116983725B CN 116983725 B CN116983725 B CN 116983725B CN 202311261442 A CN202311261442 A CN 202311261442A CN 116983725 B CN116983725 B CN 116983725B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims abstract description 119
- 239000005060 rubber Substances 0.000 claims abstract description 119
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 38
- 239000006229 carbon black Substances 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 29
- 239000012744 reinforcing agent Substances 0.000 claims description 27
- 239000002270 dispersing agent Substances 0.000 claims description 25
- 229920000459 Nitrile rubber Polymers 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000011787 zinc oxide Substances 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 18
- 239000002202 Polyethylene glycol Substances 0.000 claims description 16
- 235000021355 Stearic acid Nutrition 0.000 claims description 16
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 16
- 239000000395 magnesium oxide Substances 0.000 claims description 16
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 16
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 16
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 16
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 16
- 229920001223 polyethylene glycol Polymers 0.000 claims description 16
- 239000008117 stearic acid Substances 0.000 claims description 16
- 238000004140 cleaning Methods 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 239000011593 sulfur Substances 0.000 claims description 13
- 244000043261 Hevea brasiliensis Species 0.000 claims description 11
- 229920001030 Polyethylene Glycol 4000 Polymers 0.000 claims description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 11
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 11
- 239000012190 activator Substances 0.000 claims description 11
- 229920003052 natural elastomer Polymers 0.000 claims description 11
- 229920001194 natural rubber Polymers 0.000 claims description 11
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 239000004014 plasticizer Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 8
- 239000012745 toughening agent Substances 0.000 claims description 8
- 230000003213 activating effect Effects 0.000 claims description 7
- 238000004073 vulcanization Methods 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 abstract 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 23
- 230000006872 improvement Effects 0.000 description 17
- 239000004743 Polypropylene Substances 0.000 description 14
- -1 polypropylene Polymers 0.000 description 11
- 229920001155 polypropylene Polymers 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/001—Making filtering elements not provided for elsewhere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The invention relates to the technical field of processing of filter plates of sludge dewatering filter presses, in particular to a high-strength filter plate and a preparation method thereof, wherein the high-strength filter plate comprises high-hardness frame films and high-elasticity rubber diaphragm sheets in middle diaphragm sheet areas around the filter plate, and steel plates wrapped in the high-hardness frame films; the diaphragm area in the middle of the filter plate is made of high-elasticity rubber diaphragm sheets, so that the deformability of the diaphragm in the middle of the filter plate is enhanced, the situation that the diaphragm is torn and damaged is avoided, and the service life of the filter plate is prolonged.
Description
Technical Field
The invention relates to the technical field of filter plate processing, in particular to a high-strength filter plate and a preparation method thereof.
Background
The filter press is a common solid-liquid separation device, and can separate solid substances and liquid from suspension liquid by performing filter pressing, filtering and other treatments, wherein the filter press has the working principle that: each filter chamber of the filter press is composed of a plurality of groups of filter plates, and a closed filter chamber is formed between every two adjacent filter plates; under the pressure of a delivery pump, filter pulp with certain water content is fed into each filter chamber, meanwhile, the outside is pressurized and pressed to separate solids from liquid, filtrate is discharged through a drain pipe arranged at the bottom of the filter plate, and the solids remain in the filter chambers to form filter residues with low water content;
the patent number is: the patent document of CN103113666B discloses a polypropylene composite filter plate and a preparation method thereof, wherein the polypropylene composite filter plate comprises the following components in mass percent: 50-80 parts of polypropylene, 5-20 parts of graphite powder, 8-20 parts of glass fiber, 1-3.6 parts of surface treatment agent, 0.4-7.4 parts of unsaturated carboxylic acid and polypropylene graft phase solvent, 0.6-1.6 parts of maleic anhydride phase solvent, 0.4-3 parts of coupling agent and 1-4 parts of antioxidant; the preparation method comprises the steps of firstly carrying out surface treatment on graphite powder and glass fiber, then mixing polypropylene, a graft phase solvent of unsaturated carboxylic acid and polypropylene, an antioxidant and the surface-treated graphite powder into a graphite/PP mixed material at a high speed, extruding the graphite/PP mixed material and the dried glass fiber to obtain graphite modified reinforced PP particles, drying, extruding the graphite modified reinforced PP particles into a molten material, pressing and processing to form;
the following disadvantages still exist in the practical application process: the prior filter plate frame and the middle diaphragm area are a whole and made of the same material, and the polypropylene filter plate has lower hardness, so that the sealing performance of the filter plate frame is reduced, the fatigue resistance of the filter plate is reduced, the pressing stroke of the diaphragm is reduced, and the high pressing rate cannot be realized; the polypropylene filter plate has poor elasticity, so that the diaphragm in the middle of the filter plate is torn and damaged under the condition of cavity filtration, and the service life of the filter plate is shortened; in addition, after the production of the existing filter plate is finished, the two sides of the filter plate, the inlet and outlet flow channels and the balance holes of the filter plate are required to be processed again through a processing center, the processing steps are more, and the production efficiency of the filter plate is further reduced.
Disclosure of Invention
The invention provides a high-strength filter plate and a preparation method thereof, which can effectively solve the problems.
The invention is realized in the following way:
a high-strength filter plate comprises a supporting steel plate and high-strength rubber sheets attached and fixed on the front side and the rear side of the supporting steel plate; the high-strength rubber sheet comprises a high-hardness frame rubber sheet positioned around the supporting steel plate and a high-elasticity rubber diaphragm sheet positioned in the middle area of the supporting steel plate;
the high-hardness frame film is prepared from the following components in parts by weight: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of an activator: 16 parts of dispersing agent: 2 parts of filler: 20-40 parts of adhesive: 5 parts of reinforcing agent: 80-111 parts of an accelerant: 2.5 parts of vulcanizing agent: 10-14 parts of scorch retarder: 0.3 parts of plasticizer 4 parts;
the high-elasticity rubber diaphragm is prepared from the following components: nitrile rubber: 100 parts of zinc oxide: 5-6 parts of aluminum silicate: 20-25 parts of silane coupling agent SI-69:2 parts of an activator: 5.5 to 6.5 portions of dispersing agent: 2 parts of adhesive: 4 parts of reinforcing agent: 60-70 parts of an accelerator: 3 parts of vulcanizing agent: 2-3 parts of plasticizer: 3-5 parts.
As a further improvement, the activator of the high-hardness frame film is zinc oxide ZLB-5M, 93 magnesium oxide, stearic acid 1801 and polyethylene glycol PEG4000; the activator of the high-elasticity rubber diaphragm is 93 magnesium oxide, stearic acid 1801 and polyethylene glycol PEG4000.
As a further improvement, the dispersing agents of the high-hardness frame film and the high-elasticity rubber diaphragm are D-R, the adhesive is 306 resin, and the vulcanizing agent is insoluble sulfur.
As a further improvement, the filler of the high-hardness frame film is ZLB-4M long fiber and short fiber.
As a further improvement, the reinforcing agent of the high-hardness frame film is carbon black N550 and white carbon black YK3MP; the reinforcing agents of the high-elasticity rubber diaphragm are carbon black N330 and carbon black N550.
As a further improvement, the accelerators of the high-hardness frame film and the high-elasticity rubber diaphragm are H70 and NS.
As a further improvement, the scorch retarder of the high-hardness frame film is PVI.
As a further improvement, the plasticizer of the high-hardness frame film and the high-elasticity rubber diaphragm are DOP environment-friendly oil.
As a further improvement, the components of the high-elasticity rubber diaphragm sheet also comprise a toughening agent, and the toughening agent is Luck H-518.
The preparation method comprises the following specific steps:
step one: preparing a high-hardness frame film and a high-elasticity rubber diaphragm sheet respectively;
the preparation method of the high-hardness frame film comprises the following specific steps:
s1: mixing the nitrile rubber, the natural rubber, the butadiene styrene rubber, the activating agent, the dispersing agent, the filler and the adhesive, putting into an internal mixer, mixing for 3 minutes, and opening the internal mixer for cleaning;
s2: adding half DOP environment-friendly oil and half reinforcing agent into an internal mixer, continuously banburying to 90 ℃, and then opening the internal mixer for cleaning;
s3: adding the rest half DOP environmental protection oil and half reinforcing agent into an internal mixer, continuously banburying to 100 ℃, opening equipment to clean and continuously banburying to 110-120 ℃ to obtain primary high-hardness rubber compound, and discharging and cooling;
s4: feeding primary high-hardness rubber compound into an internal mixer, mixing to 80 ℃, discharging, rapidly feeding into an open mill, adding an accelerator, a vulcanizing agent and a scorch retarder, turning back and forth for 6 times on the left and right sides of a rubber turning swing arm of the open mill, discharging after uniform mixing, adjusting the thickness of a rubber sheet, and cooling to obtain a rubber sheet with a high-hardness frame;
the specific steps for preparing the high-elasticity rubber diaphragm are as follows:
s1, mixing and putting nitrile rubber, zinc oxide, an activating agent, a dispersing agent, an adhesive and a silane coupling agent into an internal mixer for mixing for 3 minutes, and opening the internal mixer for cleaning;
s2, mixing the reinforcing agent and aluminum silicate, putting the mixture into an internal mixer, plasticating for 3 minutes, adding half DOP environment-friendly oil and half reinforcing agent into the internal mixer, banburying to 90 ℃, and opening the internal mixer for cleaning;
s3: adding the rest half DOP environmental protection oil and half reinforcing agent into an internal mixer, continuously banburying to 100 ℃, then opening equipment for cleaning, continuously banburying to 110 ℃ to prepare primary high-elasticity rubber compound, and putting the primary high-elasticity rubber compound into an open mill for banburying and cooling;
s4: feeding primary high-elasticity rubber compound into an internal mixer, mixing to 80 ℃, discharging, rapidly feeding into an open mill, adding an accelerator and a vulcanizing agent, turning back and forth for 6 times left and right by a rubber turning swing arm of the open mill, uniformly mixing, discharging, adjusting the thickness of a rubber sheet, and cooling to obtain a high-elasticity rubber diaphragm sheet;
step two: cutting a corresponding supporting steel plate according to the shape of the filter plate, derusting the surface of the steel plate, spraying a rubber adhesive on the surface of the steel plate after derusting, and drying for later use;
step three: cutting the high-hardness frame film and the high-elasticity rubber diaphragm sheet obtained in the step one into the shapes required by the frame of the filter plate and the middle diaphragm respectively through a cutting die to obtain a preformed high-hardness frame film and a high-elasticity rubber diaphragm sheet;
step four: preheating a filter plate die by using a plate vulcanizing machine, wherein the frame area of the filter plate is 155 ℃, the position of a diaphragm in the middle of the filter plate is 140 ℃, and respectively placing a preformed high-hardness frame rubber sheet and a high-elasticity rubber diaphragm in the frame and the middle of the die;
step five: the flat vulcanizing machine is combined with a film and rapidly exhausted under 20 ℃, and then vulcanization is carried out, wherein the vulcanization time is 75 minutes;
step six: taking out the vulcanized finished product, removing frame burrs, and cooling to obtain a high-strength rubber sheet;
step seven: the high-strength rubber sheet is aligned with the supporting steel plate and is assembled and fixed on the front side and the rear side of the supporting steel plate through bolts respectively.
The beneficial effects of the invention are as follows:
the frame of the filter plate is made of the high-hardness frame film wrapped steel plate, so that the frame of the filter plate has strong compression deformation resistance, the sealing performance of the filter plate can be ensured, the squeezing stroke is prolonged, the high squeezing rate is realized, and the water content of a filter cake is reduced; the diaphragm area in the middle of the filter plate is made of high-elasticity rubber diaphragm sheets, so that the deformability of the diaphragm in the middle of the filter plate is enhanced, the situation that the diaphragm is torn and damaged is avoided, and the service life of the filter plate is prolonged.
According to the filter plate, the high-hardness frame film and the high-elasticity rubber diaphragm sheet are respectively prefabricated in a combined treatment mode of the high-hardness frame and the high-elasticity rubber diaphragm sheet, the steel plate corresponding to the shape of the high-hardness frame is cut, the steel plate is wrapped in the high-hardness frame, and finally the filter plate wrapped with the steel plate is placed in a die of a flat vulcanizing machine to be vulcanized and formed, so that a vulcanized finished product does not need to be processed according to a liquid inlet and outlet channel of the filter plate, and the processing efficiency of the filter plate is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a high strength filter plate according to the present invention;
fig. 2 is a schematic structural view of a filter plate mold provided by the invention.
In the figure: supporting steel plate-1, high-hardness frame film-2, high-elasticity rubber diaphragm-3 and filter plate mould-4.
Detailed Description
The detailed description of the embodiments of the invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
The existing filter plate frame and the middle membrane area are made of the same material in a whole, and the polypropylene filter plate has lower hardness, so that the sealing performance of the filter plate frame is reduced, the fatigue resistance of the filter plate is reduced, the squeezing stroke of a diaphragm is reduced, and high squeezing rate cannot be realized; the polypropylene filter plate has poor elasticity, so that the membrane in the middle of the filter plate is torn and damaged under the condition of cavity filtration, and the service life of the filter plate is shortened; in addition, after the production of the existing filter plate is finished, the two sides of the filter plate, the inlet and outlet flow channels and the balance holes of the filter plate are required to be processed again through a processing center, the processing steps are more, the production efficiency of the filter plate is further reduced, and in order to solve the technical problems, the following technical scheme is provided:
a high-strength filter plate comprises a supporting steel plate and high-strength rubber sheets attached and fixed on the front side and the rear side of the supporting steel plate; the high-strength rubber sheet comprises a high-hardness frame rubber sheet positioned around the supporting steel plate and a high-elasticity rubber diaphragm sheet positioned in the middle area of the supporting steel plate;
the high-hardness frame film is prepared from the following components in parts by weight: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of an activator: 16 parts of dispersing agent: 2 parts of filler: 20-40 parts of adhesive: 5 parts of reinforcing agent: 80-111 parts of an accelerant: 2.5 parts of vulcanizing agent: 10-14 parts of scorch retarder: 0.3 parts of plasticizer 4 parts;
the high-elasticity rubber diaphragm is prepared from the following components: nitrile rubber: 100 parts of zinc oxide: 5-6 parts of aluminum silicate: 20-25 parts of silane coupling agent SI-69:2 parts of an activator: 5.5 to 6.5 portions of dispersing agent: 2 parts of adhesive: 4 parts of reinforcing agent: 60-70 parts of an accelerator: 3 parts of vulcanizing agent: 2-3 parts of plasticizer: 3-5 parts.
As a further improvement, the activator of the high-hardness frame film is zinc oxide ZLB-5M, 93 magnesium oxide, stearic acid 1801 and polyethylene glycol PEG4000; the activator of the high-elasticity rubber diaphragm is 93 magnesium oxide, stearic acid 1801 and polyethylene glycol PEG4000.
As a further improvement, the dispersing agents of the high-hardness frame film and the high-elasticity rubber diaphragm are D-R, the adhesive is 306 resin, and the vulcanizing agent is insoluble sulfur.
As a further improvement, the filler of the high-hardness frame film is ZLB-4M long fiber and short fiber.
As a further improvement, the reinforcing agent of the high-hardness frame film is carbon black N550 and white carbon black YK3MP; the reinforcing agents of the high-elasticity rubber diaphragm are carbon black N330 and carbon black N550.
As a further improvement, the accelerators of the high-hardness frame film and the high-elasticity rubber diaphragm are H70 and NS.
As a further improvement, the scorch retarder of the high-hardness frame film is PVI.
As a further improvement, the plasticizers of the high-hardness frame film and the high-elasticity rubber diaphragm are DOP environment-friendly oil, namely dioctyl phthalate, and the chemical formula is C 24 H 38 O 4 Is an organic ester compound, and can increase the elasticity and toughness of rubber.
As a further improvement, the components of the high-elasticity rubber diaphragm also comprise a toughening agent, wherein the toughening agent is Luck H-518, and the Luck H-518 auxiliary agent can improve and enhance the tearing strength of rubber products, has excellent ageing resistance, can be used in severe weather and severe environment, is beneficial to the smoothness of rubber in the processing processes of mixing, extrusion and the like, and increases the softness and ductility of the rubber.
The invention provides a specific formulation of several high-strength rubber sheets, but is not limited to the following:
embodiment one: high-hardness frame film: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of zinc oxide ZLB-5M:6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:2 parts of polyethylene glycol PEG4000:5 parts of dispersing agent D-R:2 parts of ZLB-4M long fiber: 10 parts of short fibers: 10 parts of 306 resin: 5 parts of carbon black N550:55 parts of white carbon black YK3MP:25 parts of accelerator H70:1.5 parts of accelerator NS:1 part of insoluble sulfur: 10 parts of scorch retarder PVI:0.3 parts of DOP environment-friendly oil 4 parts;
high-elasticity rubber diaphragm: nitrile rubber: 100 parts of zinc oxide: 6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:1 part of polyethylene glycol PEG4000:1.5 parts of dispersant D-R:2 parts of 306 resin: 4 parts of silane coupling agent SI-69:2 parts of aluminum silicate: 20 parts of carbon black N330:50 parts of carbon black N550:10 parts of accelerator H70:1 part of accelerator NS:2 parts of insoluble sulfur: 3 parts of DOP environment-friendly oil and 5 parts of DOP environment-friendly oil;
embodiment two: high-hardness frame film: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of zinc oxide ZLB-5M:6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:2 parts of polyethylene glycol PEG4000:5 parts of dispersing agent D-R:2 parts of ZLB-4M long fiber: 10 parts of short fibers: 10 parts of 306 resin: 5 parts of carbon black N550:65 parts of white carbon black YK3MP:25 parts of accelerator H70:1.5 parts of accelerator NS:1 part of insoluble sulfur: 12 parts of scorch retarder PVI:0.3 parts of DOP environment-friendly oil 4 parts;
high-elasticity rubber diaphragm: nitrile rubber: 100 parts of zinc oxide: 6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:1 part of polyethylene glycol PEG4000:1.5 parts of dispersant D-R:2 parts of 306 resin: 4 parts of silane coupling agent SI-69:2 parts of aluminum silicate: 25 parts of carbon black N330:40 parts of carbon black N550:20 parts of accelerator H70:1 part of accelerator NS:2 parts of insoluble sulfur: 2 parts of DOP environment-friendly oil and 3 parts of DOP environment-friendly oil;
embodiment III: high-hardness frame film: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of zinc oxide ZLB-5M:6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:2 parts of polyethylene glycol PEG4000:5 parts of dispersing agent D-R:2 parts of ZLB-4M long fiber: 15 parts of short fibers: 15 parts of 306 resin: 5 parts of carbon black N550:70 parts of white carbon black YK3MP:30 parts of accelerator H70:1.5 parts of accelerator NS:1 part of insoluble sulfur: 12 parts of scorch retarder PVI:0.3 parts of DOP environment-friendly oil 4 parts;
high-elasticity rubber diaphragm: nitrile rubber: 100 parts of zinc oxide: 5 parts of 93 magnesium oxide: 4 parts of stearic acid 1801:1 part of polyethylene glycol PEG4000:1.5 parts of dispersant D-R:2 parts of 306 resin: 4 parts of silane coupling agent SI-69:2 parts of aluminum silicate: 25 parts of carbon black N330:35 parts of carbon black N550:25 parts of accelerator H70:1 part of accelerator NS:2 parts of insoluble sulfur: 2.3 parts of DOP environment-friendly oil, 5 parts;
embodiment four: high-hardness frame film: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of zinc oxide ZLB-5M:6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:2 parts of polyethylene glycol PEG4000:5 parts of dispersing agent D-R:2 parts of ZLB-4M long fiber: 20 parts of short fibers: 15 parts of 306 resin: 5 parts of carbon black N550:70 parts of white carbon black YK3MP:35 parts of accelerator H70:1.5 parts of accelerator NS:1 part of insoluble sulfur: 12 parts of scorch retarder PVI:0.3 parts of DOP environment-friendly oil 4 parts;
high-elasticity rubber diaphragm: nitrile rubber: 100 parts of zinc oxide: 6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:1 part of polyethylene glycol PEG4000:1.5 parts of dispersant D-R:2 parts of 306 resin: 4 parts of silane coupling agent SI-69:2 parts of aluminum silicate: 25 parts of carbon black N330:30 parts of carbon black N550:40 parts of accelerator H70:1 part of accelerator NS:2 parts of insoluble sulfur: 2.3 parts of DOP environment-friendly oil, 5 parts of toughening agent: 2 parts;
fifth embodiment: high-hardness frame film: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of zinc oxide ZLB-5M:6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:2 parts of polyethylene glycol PEG4000:5 parts of dispersing agent D-R:2 parts of ZLB-4M long fiber: 20 parts of short fibers: 20 parts of 306 resin: 5 parts of carbon black N550:76 parts of white carbon black YK3MP:35 parts of accelerator H70:1.5 parts of accelerator NS:1 part of insoluble sulfur: 14 parts of scorch retarder PVI:0.3 parts of DOP environment-friendly oil 4 parts;
high-elasticity rubber diaphragm: nitrile rubber: 100 parts of zinc oxide: 6 parts of 93 magnesium oxide: 3 parts of stearic acid 1801:1 part of polyethylene glycol PEG4000:1.5 parts of dispersant D-R:2 parts of 306 resin: 4 parts of silane coupling agent SI-69:2 parts of aluminum silicate: 25 parts of carbon black N330:30 parts of carbon black N550:40 parts of accelerator H70:1 part of accelerator NS:2 parts of insoluble sulfur: 2.3 parts of DOP environment-friendly oil, 5 parts of toughening agent: 4 parts;
the preparation method of the high-strength filter plate comprises the following specific steps:
step one: preparing a high-hardness frame film and a high-elasticity rubber diaphragm sheet respectively;
the preparation method of the high-hardness frame film comprises the following specific steps:
s1: mixing the nitrile rubber, the natural rubber, the butadiene styrene rubber, the activating agent, the dispersing agent, the filler and the adhesive, putting into an internal mixer, mixing for 3 minutes, and opening the internal mixer for cleaning;
s2: adding half DOP environment-friendly oil and half reinforcing agent into an internal mixer, continuously banburying to 90 ℃, and then opening the internal mixer for cleaning;
s3: adding the rest half DOP environmental protection oil and half reinforcing agent into an internal mixer, continuously banburying to 100 ℃, opening equipment to clean and continuously banburying to 110-120 ℃ to obtain primary high-hardness rubber compound, and discharging and cooling;
s4: feeding primary high-hardness rubber compound into an internal mixer, mixing to 80 ℃, discharging, rapidly feeding into an open mill, adding an accelerator, a vulcanizing agent and a scorch retarder, turning back and forth for 6 times on the left and right sides of a rubber turning swing arm of the open mill, discharging after uniform mixing, adjusting the thickness of a rubber sheet, and cooling to obtain a rubber sheet with a high-hardness frame;
the specific steps for preparing the high-elasticity rubber diaphragm are as follows:
s1, mixing and putting nitrile rubber, zinc oxide, an activating agent, a dispersing agent, an adhesive and a silane coupling agent into an internal mixer for mixing for 3 minutes, and opening the internal mixer for cleaning;
s2, mixing the reinforcing agent and aluminum silicate, putting the mixture into an internal mixer, plasticating for 3 minutes, adding half DOP environment-friendly oil and half reinforcing agent into the internal mixer, banburying to 90 ℃, and opening the internal mixer for cleaning;
s3: adding the rest half DOP environmental protection oil and half reinforcing agent into an internal mixer, continuously banburying to 100 ℃, then opening equipment for cleaning, continuously banburying to 110 ℃ to prepare primary high-elasticity rubber compound, and putting the primary high-elasticity rubber compound into an open mill for banburying and cooling;
s4: feeding primary high-elasticity rubber compound into an internal mixer, mixing to 80 ℃, discharging, rapidly feeding into an open mill, adding an accelerator and a vulcanizing agent, turning back and forth for 6 times left and right by a rubber turning swing arm of the open mill, uniformly mixing, discharging, adjusting the thickness of a rubber sheet, and cooling to obtain a high-elasticity rubber diaphragm sheet;
step two: cutting a corresponding supporting steel plate according to the shape of the filter plate, derusting the surface of the steel plate, spraying a rubber adhesive on the surface of the steel plate after derusting, and drying for later use;
step three: cutting the high-hardness frame film and the high-elasticity rubber diaphragm sheet obtained in the step one into the shapes required by the frame of the filter plate and the middle diaphragm respectively through a cutting die to obtain a preformed high-hardness frame film and a high-elasticity rubber diaphragm sheet;
step four: preheating a filter plate mould 4 by using a plate vulcanizing machine, wherein the frame area of the filter plate is 155 ℃, the position of a diaphragm in the middle of the filter plate is 140 ℃, and respectively placing a preformed high-hardness frame rubber sheet and a high-elasticity rubber diaphragm in the frame and the middle of the mould;
step five: the flat vulcanizing machine is combined with a film and rapidly exhausted under 20 ℃, and then vulcanization is carried out, wherein the vulcanization time is 75 minutes;
step six: taking out the vulcanized finished product, removing frame burrs, and cooling to obtain a high-strength rubber sheet;
step seven: the high-strength rubber sheet is aligned with the supporting steel plate and is assembled and fixed on the front side and the rear side of the supporting steel plate through bolts respectively.
In the technical scheme, in the first step, the open mill and the internal mixer are all common equipment in the field, and parameters such as rotating speed, volume, rotor, roll spacing and the like are all regulated and controlled by a person skilled in the art according to actual material characteristics; the way of receiving/feeding the film by the open mill depends on the requirement on production efficiency, and can be an automatic control mode or a manual mode;
table 1 shows the formulations of examples 1-5:
；
the high hardness frame film and the high elastic rubber diaphragm sheet obtained in the above examples 1 to 5 were tested for hardness according to ASTM D2240-05, ASTM D624-00e1 for tear strength, ASTM D395-03 for compression set, ASTM D412-06ae2 for elongation, and the test results are shown in Table 2;
detecting the ambient temperature of a laboratory at 23+/-2 ℃ and the relative humidity at 50+/-5% RH; the test shape of the tensile test is a dumbbell-shaped DieC test piece, and the test speed is 500mm/min; test shape of tear Strength: dieC test piece, test speed is 500mm/min; test temperature for compression set: the test time is 72 hours at 70 ℃ and the compression ratio is 25%.
Table 2 shows the properties of the high hardness border film and the high elastic rubber diaphragm obtained in examples 1-5:
from tables 1 and 2, it can be derived that, in the fifth embodiment, the high-hardness frame film and the supporting steel plate prepared by the method of the invention have excellent mechanical properties, especially the compression deformation capability of the high-hardness frame film and the tensile property of the high-elasticity rubber diaphragm are greatly improved;
the filter plate of the filter press is made by wrapping a high-strength rubber sheet and a supporting steel plate, and the high-strength rubber sheet consists of a high-hardness frame rubber sheet and a high-elasticity rubber diaphragm sheet, so that the compression deformation capacity of the frame of the filter plate is enhanced, the sealing performance of the filter plate is ensured, the squeezing stroke is prolonged, the high squeezing rate is realized, and the water content of a filter cake is further reduced; the diaphragm area in the middle of the filter plate is made of high-elasticity rubber diaphragm sheets, so that the deformation capacity of the diaphragm in the middle of the filter plate is enhanced, the situation that the diaphragm is torn and damaged is avoided, and the service life of the filter plate is prolonged.
Through prefabricating the high-hardness frame film around the filter plate and the high-elasticity rubber diaphragm in middle diaphragm region respectively to cut out the steel sheet that corresponds high-hardness frame shape, wrap up the steel sheet in high-hardness frame, finally through putting into the mould of press vulcanizer the high-hardness frame that wraps up with the steel sheet and high-elasticity rubber diaphragm filter plate, and be equipped with the required business turn over liquid passageway of filter plate in the mould of step four, can accomplish the formation of passageway when filter plate is made, the finished product after the vulcanization need not to process according to the business turn over liquid passageway of filter plate again, avoided the loaded down with trivial details step of follow-up processing, improved production efficiency, simplified production flow, time and human cost have still been practiced thrift simultaneously.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A high strength filter plate, characterized by: comprises a supporting steel plate and high-strength rubber sheets attached and fixed on the front side and the rear side of the supporting steel plate; the high-strength rubber sheet comprises a high-hardness frame rubber sheet positioned around the supporting steel plate and a high-elasticity rubber diaphragm sheet positioned in the middle area of the supporting steel plate;
the high-hardness frame film is prepared from the following components in parts by weight: nitrile rubber: 55 parts of natural rubber: 15 parts of styrene-butadiene rubber: 30 parts of an activator: 16 parts of dispersing agent: 2 parts of filler: 20-40 parts of adhesive: 5 parts of reinforcing agent: 80-111 parts of an accelerant: 2.5 parts of vulcanizing agent: 10-14 parts of scorch retarder: 0.3 parts of plasticizer 4 parts;
the high-elasticity rubber diaphragm is prepared from the following components: nitrile rubber: 100 parts of zinc oxide: 5-6 parts of aluminum silicate: 20-25 parts of silane coupling agent SI-69:2 parts of an activator: 5.5 to 6.5 portions of dispersing agent: 2 parts of adhesive: 4 parts of reinforcing agent: 60-70 parts of an accelerator: 3 parts of vulcanizing agent: 2-3 parts of plasticizer: 3-5 parts;
the activating agent of the high-hardness frame film is zinc oxide ZLB-5M, 93 magnesium oxide, stearic acid 1801 and polyethylene glycol PEG4000; the activators of the high-elasticity rubber diaphragm are 93 magnesium oxide, stearic acid 1801 and polyethylene glycol PEG4000;
the dispersing agents of the high-hardness frame film and the high-elasticity rubber diaphragm are D-R, the adhesives are 306 resin, and the vulcanizing agents are insoluble sulfur;
the filler of the high-hardness frame film is ZLB-4M long fiber and short fiber;
the reinforcing agents of the high-hardness frame film are carbon black N550 and white carbon black YK3MP; the reinforcing agents of the high-elasticity rubber diaphragm are carbon black N330 and carbon black N550;
the accelerators of the high-hardness frame film and the high-elasticity rubber diaphragm are H70 and NS;
the scorch retarder of the high-hardness frame film is PVI;
and the plasticizer of the high-hardness frame film and the high-elasticity rubber diaphragm is DOP environment-friendly oil.
2. The high strength filter plate of claim 1, wherein: the components of the high-elasticity rubber diaphragm sheet also comprise a toughening agent, and the toughening agent is Luck H-518.
3. A method of making a high strength filter plate according to any one of claims 1-2, wherein:
the preparation method comprises the following specific steps:
step one: preparing a high-hardness frame film and a high-elasticity rubber diaphragm sheet respectively;
the preparation method of the high-hardness frame film comprises the following specific steps:
s1: mixing the nitrile rubber, the natural rubber, the butadiene styrene rubber, the activating agent, the dispersing agent, the filler and the adhesive, putting into an internal mixer, mixing for 3 minutes, and opening the internal mixer for cleaning;
s2: adding half DOP environment-friendly oil and half reinforcing agent into an internal mixer, continuously banburying to 90 ℃, and then opening the internal mixer for cleaning;
s3: adding the rest half DOP environmental protection oil and half reinforcing agent into an internal mixer, continuously banburying to 100 ℃, opening equipment to clean and continuously banburying to 110-120 ℃ to obtain primary high-hardness rubber compound, and discharging and cooling;
s4: feeding primary high-hardness rubber compound into an internal mixer, mixing to 80 ℃, discharging, rapidly feeding into an open mill, adding an accelerator, a vulcanizing agent and a scorch retarder, turning back and forth for 6 times on the left and right sides of a rubber turning swing arm of the open mill, discharging after uniform mixing, adjusting the thickness of a rubber sheet, and cooling to obtain a rubber sheet with a high-hardness frame;
the specific steps for preparing the high-elasticity rubber diaphragm are as follows:
s1, mixing and putting nitrile rubber, zinc oxide, an activating agent, a dispersing agent, an adhesive and a silane coupling agent into an internal mixer for mixing for 3 minutes, and opening the internal mixer for cleaning;
s2, mixing the reinforcing agent and aluminum silicate, putting the mixture into an internal mixer, plasticating for 3 minutes, adding half DOP environment-friendly oil and half reinforcing agent into the internal mixer, banburying to 90 ℃, and opening the internal mixer for cleaning;
s3: adding the rest half DOP environmental protection oil and half reinforcing agent into an internal mixer, continuously banburying to 100 ℃, then opening equipment for cleaning, continuously banburying to 110 ℃ to prepare primary high-elasticity rubber compound, and putting the primary high-elasticity rubber compound into an open mill for banburying and cooling;
s4: feeding primary high-elasticity rubber compound into an internal mixer, mixing to 80 ℃, discharging, rapidly feeding into an open mill, adding an accelerator and a vulcanizing agent, turning back and forth for 6 times left and right by a rubber turning swing arm of the open mill, uniformly mixing, discharging, adjusting the thickness of a rubber sheet, and cooling to obtain a high-elasticity rubber diaphragm sheet;
step two: cutting a corresponding supporting steel plate according to the shape of the filter plate, derusting the surface of the steel plate, spraying a rubber adhesive on the surface of the steel plate after derusting, and drying for later use;
step three: cutting the high-hardness frame film and the high-elasticity rubber diaphragm sheet obtained in the step one into the shapes required by the frame of the filter plate and the middle diaphragm respectively through a cutting die to obtain a preformed high-hardness frame film and a high-elasticity rubber diaphragm sheet;
step four: preheating a filter plate die by using a plate vulcanizing machine, wherein the frame area of the filter plate is 155 ℃, the position of a diaphragm in the middle of the filter plate is 140 ℃, and respectively placing a preformed high-hardness frame rubber sheet and a high-elasticity rubber diaphragm in the frame and the middle of the die;
step five: the flat vulcanizing machine is combined with a film and rapidly exhausted under 20 ℃, and then vulcanization is carried out, wherein the vulcanization time is 75 minutes;
step six: taking out the vulcanized finished product, removing frame burrs, and cooling to obtain a high-strength rubber sheet;
step seven: the high-strength rubber sheet is aligned with the supporting steel plate and is assembled and fixed on the front side and the rear side of the supporting steel plate through bolts respectively.
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