A plate capacitor and a method of manufacturing the same

Abstract

The present application relates to the technical field of sensor, in particular to a plate capacitor and a preparation method thereof, wherein the plate capacitor comprises electrode plates and an elastic layer arranged between the electrode plates, the elastic layer comprises at least one rubber sheet; if the elastic layer comprises two or more rubber sheets, the multiple rubber sheet layers are made into the elastic layer through a laminating method; the surface of the rubber sheet is brushed with a first surface treatment agent material to form a first modified layer; and the surface of the electrode plate is brushed with a second surface treatment agent material to form a second modified layer. Through the control of the component and the ratio of the surface treatment agent raw material, the cooperation of the rubber composite material and the nanosheet layer material, the plate capacitor has good resilience, low-temperature resistance, high dielectric, high pressure resistance, the rubber composite material, the nanosheet layer material and the electrode plate are integrally formed, high-strength bonding is formed, and the batch stability and the service life of the plate capacitor are greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of sensor material science and technology, and in particular to a plate-type capacitor elastic layer composite material, a plate-type capacitor and a preparation method thereof. Technical Background

[0002] A plate capacitor, also known as a parallel plate capacitor, is the most basic and simplest capacitor structure. It consists of two parallel, closely spaced, insulated metal plates. Between the plates is typically filled an insulating dielectric, such as air, mica, ceramic, or plastic film. The capacitance of a plate capacitor is calculated using the formula C = εS / 4πkd, where ε is the dielectric constant of the dielectric between the plates, S is the plate area, d is the distance between the plates, and k is the electrostatic force constant.

[0003] Letting A = S / 4πk, the simplified formula is C = εA / d. This shows that the capacitance of a plate capacitor increases with the dielectric constant of the dielectric layer and decreases with the distance between the plates. A dielectric constant that is too low for the elastic layer will reduce the measurable range of the sensor capacitance, requiring high precision for capacitance detection equipment. Poor resilience of the elastic layer will cause the sensor capacitance to decrease with increasing compression cycles, affecting detection accuracy. The dielectric constant and resilience of polymers are related to their molecular structure and condensed state structure. The more flexible the molecular structure of a non-polymer, the lower the glass transition temperature and the better the resilience, but the lower the dielectric constant. Polar polymers, due to the interaction between the dipole moments of the polar groups, increase their own dielectric constant while also increasing their glass transition temperature and reducing their resilience.

[0004] Polymers are widely used in flexible sensors due to their good resilience. However, due to the inherent strength limitations of polymers, these sensors have a very small range, typically not exceeding 10 MPa. To achieve a higher range for plate-type capacitive sensors, the plate capacitor's inherent compressive strength must also be enhanced. Summary of the Invention

[0005] The purpose of the present invention is to address the technical problem that existing plate capacitors have difficulty in achieving high rebound, low temperature resistance, high dielectric strength and high compressive strength, and to provide a plate capacitor elastic layer composite material, a plate capacitor and a preparation method thereof.

[0006] In order to achieve the above-mentioned first object, the technical solution adopted by the present invention is:

[0007] A plate capacitor comprises electrode plates and an elastic layer disposed between the electrode plates, wherein the elastic layer comprises at least one layer of rubber sheet;

[0008] If the elastic layer comprises two or more rubber sheets, the elastic layer is formed by laminating the multiple rubber sheets;

[0009] The surface of the rubber sheet is coated with a first surface treatment agent material to form a first modified layer;

[0010] The surface of the electrode plate is coated with a second surface treatment agent material to form a second modified layer;

[0011] The first surface treatment agent material is mainly prepared from the following raw materials in parts by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-50 parts of nanosheet barium titanate;

[0012] The second surface treatment agent material is mainly prepared from the following raw materials in parts by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, and 0.2-0.5 parts of carbon black.

[0013] Wherein, the isocyanate material is one of isocyanate and isocyanate prepolymer or a mixture of the two.

[0014] The plate capacitor of the present invention adopts an elastic layer composite material different from that of traditional plate capacitors. The base of a rubber sheet made of the rubber composite material is brushed or rolled with a first surface treatment agent material, and a continuous layer of nano-barium titanate is formed by brushing or rolling on the surface of the rubber sheet, thereby enhancing the dielectric properties of the elastic layer.

[0015] The isocyanate component in the first surface treatment material reacts with the hydroxyl groups of the nano-barium titanate sheet to form a strong chemical bond. Simultaneously, at high temperatures, the rubber sheet forms strong chemical crosslinks with the first surface treatment material through sulfur-sulfur and carbon-carbon bonds. Zinc oxide in the surface treatment agent provides reactivity, peroxide and sulfur initiate crosslinking reactions, and carbon black provides both coloring and reinforcement, improving mechanical properties.

[0016] The second surface treatment agent material uses raw materials similar to but different from those of the first surface treatment agent material based on the characteristics of the electrode plate, reduces the nanosheet layer of barium titanate, and keeps the other components the same, so that the first modified layer on the surface of the rubber sheet and the second modified layer on the surface of the electrode plate have good mutual affinity, and the performance of the plate capacitor is excellent.

[0017] By controlling the raw material components and ratios of the surface treatment agent and coordinating the synergistic effect of the rubber sheet made of the rubber composite material, the elastic layer composite material has good rebound, low temperature resistance, high dielectric and high compressive resistance, and a high-strength bond can be formed between the rubber sheet and the sheet layer of nano-barium titanate, greatly improving the quality of the elastic layer composite material.

[0018] Among them, nanosheet barium titanate is a nanosheet material.

[0019] Furthermore, a first surface treatment agent material is applied by roller coating or brush coating on the outer surface of the rubber sheet to form a first modified layer, thereby obtaining a rubber sheet having the first modified layer.

[0020] Furthermore, the rubber sheet is a rubber sheet made of a rubber composite material.

[0021] Furthermore, the elastic layer comprises two or more rubber sheets, and a first surface treatment material is applied to the surfaces of the rubber sheets to form a sheet-like nano-barium titanate layer on the rubber sheets. In the composite material formed by the elastic layer, the first surface treatment material is applied by brush or roller between adjacent rubber sheets. After the solvent evaporates, a first modified layer is formed on the surface of the rubber sheets. The first modified layer sandwiches the sheet-like nano-barium titanate between the adjacent rubber sheets.

[0022] Furthermore, the rubber sheet is a sheet made of a rubber composite material, specifically, the rubber sheet is mainly prepared from the following raw materials, in parts by weight: 100 parts of rubber, 40-55 parts of filler, 5-15 parts of naphthenic oil, 4-10 parts of zinc oxide, 1-2 parts of stearic acid, 2.5-3 parts of a second accelerator, 2-4 parts of a vulcanizing agent, and 2-3 parts of an antioxidant. The antioxidant comprises an amine antioxidant and a peroxide decomposing agent-type antioxidant, the vulcanizing agent is a mixture of sulfur and a second peroxide, and the rubber has a glass transition temperature below -30°C.

[0023] Preferably, in the raw material for preparing the rubber sheet, the rubber (i.e. raw rubber) is a rubber with a glass transition temperature lower than -30℃. In the raw material for preparing the rubber sheet, the rubber with a glass transition temperature lower than -30℃ is used as the main raw material. The molecular chain of the low glass transition temperature rubber is flexible and not easy to crystallize, and can maintain high elasticity at low temperature. The first surface treatment agent material is brushed or rolled between adjacent rubber sheets (i.e. rubber composite sheets), and the elastic layer composite material is prepared by stacking multiple layers. The first surface treatment agent material contains sheet-like nano-barium titanate, and the brushing or rolling method can orient the sheet-like nano-barium titanate on the rubber sheet. The sheet-like nano-barium titanate can not only increase the dielectric constant of the elastic layer composite material, but also increase the rigidity of the elastic layer composite material and improve its carrying capacity. The isocyanate component in the raw material component can react with the hydroxyl group of the sheet-like nano-barium titanate to form a firm chemical bond. At the same time, the rubber sheet can form a firm chemical cross-linking bond with the first surface treatment agent material through sulfur-sulfur bond and carbon-carbon bond at high temperature.

[0024] Further, in the raw material for preparing the rubber sheet, the filler is a mixture of carbon black and nano-spherical barium titanate.

[0025] Preferably, the ratio of carbon black to nano-spherical barium titanate is 1:1 to 0.5.

[0026] Further, in the raw material for preparing the rubber sheet, the glass transition temperature of the raw rubber is lower than -30℃.

[0027] Further, the anti-aging agent is one or both of anti-aging agent AW and anti-aging agent 445. In the raw material for preparing the rubber sheet, the anti-aging agent is selected from one or both of the above-mentioned raw materials, which can optimize the initial performance of the rubber sheet and improve the overall performance of the capacitor.

[0028] Preferably, the anti-aging agent is a mixture of anti-aging agent AW and anti-aging agent 445, and the weight ratio of the anti-aging agent AW to the anti-aging agent 445 is 1:1. The use of one or both of anti-aging agent AW and anti-aging agent 445 can form a synergistic effect, which can capture molecular chain free radicals generated during aging and terminate the molecular chain aging reaction.

[0029] Further, the weight ratio of sulfur to the second peroxide is 0.8 to 3:1.

[0030] More preferably, the weight ratio of sulfur to the second peroxide is 1 to 2:1.

[0031] Further, the second peroxide is one or both of DCP and BIBP.

[0032] Peroxide and sulfur are used together as vulcanizing agents, which not only retains the high tensile strength and elongation of the sulfur-sulfur bond, but also forms a certain carbon-carbon bond with high bond energy and is not easily oxidized.

[0033] Furthermore, the second accelerator is a mixture of a sulfenamide accelerator and a thiuram accelerator.

[0034] Wherein, the sulfenamide accelerator is one or more of N-tert-butyl-2-benzothiazolesulfenamide, N-cyclohexyl-2-benzothiazolesulfenamide, N,N-dicyclohexyl-2-benzothiazolesulfenamide, N-oxydiethylene-2-benzothiazolesulfenamide and N-oxydiethylenethiocarbamoyl-N′-oxydiethylenesulfenamide;

[0035] The thiuram accelerator is one or more of tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethylthiuram disulfide, and bis(1,5-pentylene)thiuram tetrasulfide.

[0036] Preferably, the sulfenamide accelerator is NOBS, and the thiuram accelerator is TMTM.

[0037] Furthermore, the weight ratio of the sulfenamide accelerator to the thiuram accelerator is 2:0.5 to 2.5:0.5.

[0038] Preferably, the weight ratio of the sulfenamide accelerator to the thiuram accelerator is 2:0.5.

[0039] The accelerator in the rubber sheet formula can form a single sulfur bond by cross-linking, which is beneficial to the high temperature resistance of the material.

[0040] Furthermore, the first surface treatment agent material is mainly prepared from the following raw materials in parts by weight: 60-80 parts of organic solvent, 4-19 parts of isocyanate material, 2-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.7 parts of sulfur, 0.1-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-45 parts of nanosheet barium titanate.

[0041] Further, the first surface treatment agent material is prepared by the following weight parts of raw materials: organic solvent 60-80 parts, isocyanate material 4-18 parts, polyol 2-9 parts, first peroxide 0.5-1 part, zinc oxide 1.2-2 parts, sulfur 0.5-0.8 parts, first accelerator 0.6-0.8 parts, carbon black 0.2-0.5 parts, and nanosheet barium titanate 10-50 parts. With the preferred raw material formula of the first surface treatment agent material, the first modified layer prepared has better resilience, low temperature resistance, high dielectric, and high pressure resistance on the surface of the elastic layer composite material, and especially better bonding between the rubber sheet and the nanosheet barium titanate.

[0042] Further, the second surface treatment agent material is prepared by the following weight parts of raw materials: organic solvent 60-75 parts, isocyanate material 4-20 parts, polyol 2-10 parts, first peroxide 0.1-1 part, zinc oxide 0.5-2 parts, sulfur 0.1-0.8 parts, first accelerator 0.1-0.8 parts, and carbon black 0.2-0.5 parts.

[0043] Further, the polyol is at least one of terminal hydroxyl polybutadiene and terminal amine polybutadiene. On the one hand, the terminal hydroxyl polybutadiene and the terminal amine polybutadiene can provide double bonds to enable the surface treatment agent to react with the interface of the laminated rubber, and on the other hand, the terminal hydroxyl polybutadiene and the terminal amine polybutadiene have good flexibility and can improve the low temperature resistance of the surface treatment agent.

[0044] Further, the polyol is terminal hydroxyl polybutadiene with an average molecular weight of 1000-5000.

[0045] Preferably, the polyol is terminal hydroxyl polybutadiene with an average molecular weight of 3000-5000.

[0046] It is found through a large number of experimental studies that the average molecular weight of the terminal hydroxyl polybutadiene affects the viscosity and rigidity of the surface treatment agent. It is found that when the average molecular weight is less than 1000, the rigidity of the surface treatment agent after reaction is too large, affecting the bonding. When the average molecular weight is higher than 5000, the viscosity of the surface treatment agent is too large, affecting its infiltration effect on the interface.

[0047] Further, in the first surface treatment agent material and the second surface treatment agent material, the organic solvent is one or more of toluene, xylene, and ethylbenzene.

[0048] Further, the isocyanate is at least one of hexamethylene diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, and polymethylene polyphenyl isocyanate.

[0049] Further, the isocyanate prepolymer is prepared from isocyanate and terminal hydroxyl polybutadiene.

[0050] Furthermore, the isocyanate prepolymer is mainly prepared by the following method:

[0051] a. Vacuum the hydroxyl-terminated polybutadiene at 110-130°C to remove water;

[0052] b. Mix isocyanate and hydroxy-terminated polybutadiene at room temperature in an NCO:OH ratio of 1 to 3:1, and then react at 60°C to 90°C for 1.5 to 3 hours. After the reaction is completed, an isocyanate prepolymer is obtained.

[0053] Furthermore, the first peroxide is benzoyl peroxide.

[0054] Furthermore, the first accelerator is a sulfenamide accelerator, and preferably the first accelerator is accelerator CZ.

[0055] Furthermore, the first surface treatment agent material is prepared by the following method:

[0056] Step S1: vacuumize the polyol at 110-130° C., remove water, and cool to room temperature;

[0057] Step S2: under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1, and react for 2 hours;

[0058] Step S3: adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, carbon black, and nanosheet barium titanate to the reactant obtained in step S2 in sequence, and stirring at room temperature to obtain a first surface treatment agent material.

[0059] Furthermore, the second surface treatment agent material is prepared by the following method:

[0060] Step S1: vacuumize the polyol at 110-130° C., remove water, and cool to room temperature;

[0061] Step S2: under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1, and react for 2 hours;

[0062] Step S3: adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, and carbon black to the reactant obtained in step S2 in sequence, and stirring at room temperature to obtain a second surface treatment agent material.

[0063] Furthermore, the elastic layer is prepared by the following method:

[0064] T1. Take the raw materials for preparing the rubber sheet and mix them to obtain the rubber sheet.

[0065] T2. Prepare the first surface treatment agent material and set aside.

[0066] T3. Cut rubber sheets according to specifications;

[0067] Then, the first surface treatment material obtained in step T2 is applied by roller or brush to the surface of the rubber sheet and allowed to stand to form a rubber sheet having a first modified layer. At least one rubber sheet having a first modified layer is used as the elastic layer. If two or more rubber sheets having the first modified layer are present, they are stacked to form a composite material having an elastic layer.

[0068] Furthermore, the specific operation steps in T1 are as follows: kneading the raw rubber, filler, naphthenic oil, zinc oxide, stearic acid, a second accelerator, and an antioxidant in a proportioned manner in an internal mixer, sheeting to obtain a rubber mix, then mixing the rubber mix with a vulcanizing agent, sheeting to obtain a rubber sheet, i.e., a rubber composite material sheet.

[0069] The ratio of the above-mentioned raw rubber, filler, naphthenic oil, zinc oxide, stearic acid, second accelerator and antioxidant is: 100 parts of rubber, 40-55 parts of filler, 5-15 parts of naphthenic oil, 4-10 parts of zinc oxide, 1-2 parts of stearic acid, 2.5-3 parts of second accelerator, 2-4 parts of vulcanizer and 2-3 parts of antioxidant.

[0070] Another object of the present invention is to provide a method for preparing the above-mentioned plate capacitor.

[0071] The present invention controls the raw material components and ratios of the second surface treatment agent material, and cooperates with the synergistic effect of the elastic layer composite material to make the plate capacitor have good rebound, low temperature resistance, high dielectric strength, and high compressive resistance. The elastic layer composite material and the electrode plate are integrally formed by molding. After molding, the elastic layer composite material and the electrode plate can form a high-strength bond, which greatly improves the batch stability of the plate capacitor product. The preparation process is simple and is conducive to industrial large-scale production and application.

[0072] A method for preparing a plate capacitor comprises the following steps:

[0073] The rubber material is mixed to obtain a rubber sheet for later use; a first surface treatment agent material is prepared for later use;

[0074] Cutting the rubber sheet according to specifications; then, applying the first surface treatment agent material by roller coating or brushing on the surface of the rubber sheet, and letting it stand to obtain a modified rubber sheet;

[0075] A second surface treatment agent material is prepared and set aside; the electrode plate is cut according to specifications, and the surface of the electrode plate is sandblasted and degreased; then, the second surface treatment agent material is roller-coated or brushed onto the outer surface of the electrode plate and allowed to stand to obtain a modified electrode plate;

[0076] At least one layer of modified film is stacked as an elastic layer and placed between modified electrode plates; then, it is placed in a mold, vulcanized and molded at 135-150° C., and demoulded to obtain a plate capacitor.

[0077] Further, the first surface treatment agent material is roller-coated or brush-coated on the rubber sheet, and the coating amount is controlled to be 20-50g / m 2 .

[0078] Further, the second surface treatment agent material is roller-coated or brushed onto the electrode plate, and the coating amount is controlled to be 20-50g / m 2 .

[0079] Furthermore, the first surface treatment agent material is prepared by the following method:

[0080] B101. Vacuum the polyol at 110-130°C according to the proportion, remove water, and cool to room temperature.

[0081] B102. Under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1 and react for 2 h.

[0082] B103. Add an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, carbon black, and flaky nano-barium titanate to the reactant obtained in B102 in order according to proportion, and stir at room temperature to obtain a first surface treatment agent material.

[0083] Furthermore, the second surface treatment agent material is prepared by the following method:

[0084] B201. Vacuum the polyol at 110-130°C according to the proportion, remove water, and cool to room temperature.

[0085] B202. Under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1 and react for 2 h.

[0086] B203. Add an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, and carbon black to the reactant obtained in B202 in order according to proportion, and stir at room temperature to obtain a second surface treatment agent material.

[0087] The plate capacitor provided by the application is obtained by placing the electrode plate coated with the second surface treatment agent material on the upper and lower surfaces of the elastic layer composite material, and then vulcanizing and forming, and then demolding to obtain the plate capacitor.

[0088] To sum up, due to the adoption of the technical scheme, the beneficial effects of the application are:

[0089] 1. The elastic layer composite material provided by the application is a layered nanometer biomimetic material formed by using rubber sheets (i.e., rubber composite material sheets) as surface treatment substrates, and by coating the nanometer barium titanate sheet layer by brushing or rolling.

[0090] 2. The elastic layer composite material has good resilience, low-temperature resistance, high dielectricity and high pressure resistance by controlling the components and proportions of the surface treatment agent raw materials and by the synergistic effect of the rubber sheets (i.e., rubber composite material sheets), and the rubber composite material sheets and the nanometer barium titanate sheet layer can form a high-strength bond, greatly improving the quality of the elastic layer composite material.

[0091] 3. The rubber composite material, the nanometer sheet layer material and the electrode plate of the plate capacitor provided by the application are integrally formed, forming a high-strength bond, greatly improving the batch stability and service life of the plate capacitor.

[0092] 4. The plate capacitor provided by the application has a simple preparation process, which is conducive to industrialized mass production and application. BRIEF DESCRIPTION OF DRAWINGS

[0093] Figure 1 Figure 6 is a graph showing the change of the capacitance of the plate capacitor of Example 6 with stress at -20℃. DETAILED DESCRIPTION

[0094] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the following examples are used to further illustrate the application. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0095] The raw reagents used in the examples and comparative examples of the application can be chemical reagents of the following brands, purities or specifications, but are not limited to the reagents of the following specifications or models. Reagents with equivalent functions / effects known to those skilled in the art can be replaced without affecting the implementation of the technical scheme of the application.

[0096] Butadiene rubber, molecular weight 1000-5000, purchased Company.

[0097] Carbon black, 99% pure, purchased from company.

[0098] Nano-spherical barium titanate, purity 99.9%, average particle size 100nm, purchased from company.

[0099] Nanosheet barium titanate was purchased from Shandong Guoci Functional Materials Co., Ltd.

[0100] Naphthenic oil, analytical grade AR, was purchased from Chengdu Kelong Chemicals Co., Ltd.

[0101] Zinc oxide, purity 99.95%, was purchased from Chengdu Kelong Chemical Co., Ltd.

[0102] Stearic acid, analytical grade, was purchased from Chengdu Kelong Chemicals Co., Ltd.

[0103] NOBS, also known as accelerator NOBS, is N-(oxydiethylene)-2-benzothiazole sulfenamide, analytically pure, purchased from company.

[0104] TMTM, tetramethylthiuram monosulfide, 97% purity, purchased from company.

[0105] DCP, i.e. 1,3-dichloro-2-propanol, with a purity of 98%, was purchased from company.

[0106] Accelerator CZ, N-cyclohexylbenzothiazole-2-sulphenamide, CAS: 95-33-0, was purchased from Jiangsu Bosite Chemical Technology Co., Ltd.

[0107] Antioxidant AW, namely ethoxyquinoline, purity 90%, purchased from company.

[0108] Antioxidant 445, i.e. 4,4'-di(phenylisopropyl)diphenylamine, purity 98%, purchased from company.

[0109] The fractions of the raw materials and intermediate materials used in the following examples are all weight parts, and the weight of each part can be 0.5 g, 1 g, or 10 g according to the small test or pilot scale of the experiment. Specifically, the weight of each part selected in the experiment is 1 gram.

[0110] Example 1

[0111] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 10 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into a 0.1 mm rubber sheet (hereinafter referred to as a sheet).

[0112] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 1000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature and set aside. Add 4 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen atmosphere, stir and heat to 80°C ± 5°C at a stirring speed of 120 r / min, then slowly add 1 part of hydroxy-terminated polybutadiene with an average molecular weight of 1000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 10 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0113] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0114] Step 4: Remove water from the hydroxy-terminated polybutadiene with an average molecular weight of 1000 by vacuuming at 120°C for 1 hour. After removal of water, cool to room temperature. Add 4 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring rate of 120 r / min. Then, slowly add 1 part of hydroxy-terminated polybutadiene with an average molecular weight of 1000 and allow to react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir at room temperature to obtain the second surface treatment agent material.

[0115] Step 5: Cut the electrode plate into the specified shape, i.e. prepare the electrode plate, and perform surface sandblasting and degreasing. Apply the polyurethane surface treatment agent (i.e. the second surface treatment agent material, the main active ingredient is polyurethane, the same below) obtained in step 4 evenly to the surface of the electrode plate by roller or brush, and control the coating amount to 30g / m 2 , wait until the solvent evaporates completely and set aside.

[0116] Step 6: The rubber sheets obtained in step 3 are stacked in multiple layers and placed between the treated plates in a mold for vulcanization at 135° C. After vulcanization for 60 minutes, the plates are demoulded and trimmed to obtain a plate capacitor.

[0117] Example 2

[0118] Step 1: Weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 15 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix the mixture evenly in an internal mixer, remove the sheet, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the cis-1,4-butadiene rubber mix into 0.1 mm rubber sheets.

[0119] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 5000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen atmosphere, stir and heat to 80°C ± 5°C at a stirring speed of 120 r / min, then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 5000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 20 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0120] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0121] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 5000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen protection and stir until the temperature reaches 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 5000 and react for 2 hours before the reaction is terminated. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0122] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0123] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0124] Example 3

[0125] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0126] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stir and heat to 80°C ± 5°C at a stirring speed of 120 r / min, then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 30 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0127] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0128] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0129] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0130] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0131] Example 4

[0132] Step 1: Weigh 100 parts of cis-1,4-butadiene rubber, 20 parts of carbon black, 30 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the cis-1,4-butadiene rubber mix into 0.1 mm rubber sheets.

[0133] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stir and heat to 80°C ± 5°C at a stirring speed of 120 r / min, then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 30 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0134] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0135] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0136] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m2 , and wait for the solvent to evaporate completely before use.

[0137] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0138] Example 5

[0139] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0140] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen protection and stir until the temperature reaches 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 40 parts of nanosheet barium titanate to the above reactants in sequence, and stir at room temperature to obtain the first surface treatment agent material.

[0141] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0142] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0143] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0144] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0145] Example 6

[0146] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0147] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen atmosphere, stir and heat to 80°C ± 5°C at a stirring speed of 120 r / min, then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 50 parts of nanosheet barium titanate to the above reactants in sequence, and stir at room temperature to obtain the first surface treatment agent material.

[0148] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0149] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0150] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0151] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0152] Example 7

[0153] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 17 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0154] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen atmosphere, stir, and heat to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 25 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0155] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0156] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0157] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0158] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0159] Example 8

[0160] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 17 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0161] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen protection, stir and heat to 80°C ± 5°C at a stirring speed of 120 r / min, then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 35 parts of nanosheet barium titanate to the above reactants in sequence, and stir at room temperature to obtain the first surface treatment agent material.

[0162] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0163] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0164] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0165] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0166] Example 9

[0167] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 17 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0168] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen atmosphere, stir, and heat to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, and 40 parts of nanosheet barium titanate to the above reactants in sequence, and stir at room temperature to obtain the first surface treatment agent material.

[0169] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m2 , and cut into specified shapes after the solvent evaporates.

[0170] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0171] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0172] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0173] Comparative Example 1

[0174] Step 1: Weigh 100 parts of cis-1,4-butadiene rubber, 50 parts of carbon black, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, cut them into sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the cis-1,4-butadiene rubber mix into 0.1 mm rubber sheets.

[0175] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0176] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m2 , and cut into specified shapes after the solvent evaporates.

[0177] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0178] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0179] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0180] Comparative Example 2

[0181] Step 1: Weigh 100 parts of butyl rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Mix them evenly in an internal mixer, remove the sheets, and obtain a rubber mix, which is set aside for use. Then, mix the rubber mix evenly with a vulcanizing agent, and cast the butyl rubber mix into 0.1 mm rubber sheets.

[0182] Step 2: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0183] Step 3: Apply the first surface treatment agent obtained in step 2 evenly on the rubber sheet obtained in step 1, and control the coating amount to 30g / m 2 , and cut into specified shapes after the solvent evaporates.

[0184] Step 4: Vacuum the hydroxy-terminated polybutadiene with an average molecular weight of 3000 at 120°C for 1 hour to remove water. After the water is removed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under nitrogen, stirring and heating to 80°C ± 5°C at a stirring speed of 120 r / min. Then slowly add 10 parts of hydroxy-terminated polybutadiene with an average molecular weight of 3000 and react for 2 hours before terminating the reaction. Then, add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, and 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0185] Step 5: Cut the plate into the required shape, and perform sandblasting and degreasing on the surface. Apply the polyurethane surface treatment agent obtained in step 4 evenly to the surface of the plate by roller or brush, and control the coating amount to 30g / m 2 , and wait for the solvent to evaporate completely before use.

[0186] Step 6: Place the rubber sheets obtained in step 3 in multiple layers between the plates treated in step 5 in a mold and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0187] The rubber bearing obtained in the present invention is subjected to physical property tests using the following standards. The specific test methods or reference standards are as follows.

[0188] GB / T 7760-2003 was used to test the peel strength between the elastic layer composite material and the electrode plate.

[0189] GB / T 15256-2014 was used to test the low temperature resistance of the elastic layer composite material.

[0190] The compression modulus of plate capacitors was tested using a universal mechanical testing machine.

[0191] GB / T 5594.4-2015 is used to test the dielectric constant of board capacitors.

[0192] The LCR tester and universal mechanical testing machine were used to test the change of pressure with capacitance of plate capacitors at low temperature.

[0193] GBT7759.1-2015 is used to test the compression permanent deformation of plate capacitors.

[0194] The performance of the materials was tested using the above methods or in accordance with national standards, and the properties of the materials and plate capacitors prepared in the examples and comparative examples were finally obtained, as shown in the following table.

[0195] Table 1 Physical properties test results

[0196]

[0197]

[0198] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plate capacitor, characterized in that: It includes electrode plates and an elastic layer disposed between the electrode plates, wherein the elastic layer includes at least one layer of rubber sheet; If the elastic layer comprises two or more rubber sheets, the elastic layer is formed by laminating the multiple rubber sheets; The surface of the rubber sheet is coated with a first surface treatment agent material to form a first modified layer; The surface of the electrode plate is coated with a second surface treatment agent material to form a second modified layer; The first surface treatment agent material is mainly prepared from the following raw materials in parts by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-50 parts of nanosheet barium titanate; The second surface treatment agent material is mainly prepared from the following raw materials in parts by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, and 0.2-0.5 parts of carbon black; Wherein, the isocyanate material is one of isocyanate and isocyanate prepolymer or a mixture of the two.

2. A plate capacitor according to claim 1, characterized in that: The rubber sheet is made of a rubber composite material.

3. The plate capacitor according to claim 1, characterized in that: The rubber sheet is a sheet made of a rubber composite material. Specifically, the rubber sheet is mainly prepared from the following raw materials in parts by weight: 100 parts of rubber, 40-55 parts of filler, 5-15 parts of cyclohexane oil, 4-10 parts of zinc oxide, 1-2 parts of stearic acid, 2.5-3 parts of a second accelerator, 2-4 parts of a vulcanizing agent, and 2-3 parts of an antioxidant; wherein the antioxidant comprises an amine antioxidant and a peroxide decomposition agent-type antioxidant, and the vulcanizing agent is a mixture of sulfur and a second peroxide; and the rubber has a glass transition temperature below -30°C.

4. A plate capacitor according to claim 3, characterized in that: In the raw materials for preparing the film, the filler is a mixture of carbon black and nano-spherical barium titanate.

5. The plate capacitor according to claim 3, characterized in that: The antioxidants are antioxidant AW and antioxidant 445.

6. The plate capacitor according to claim 3, characterized in that: The polyol is one or both of hydroxyl-terminated polybutadiene and amine-terminated polybutadiene.

7. The plate capacitor according to claim 1, characterized in that: The isocyanate prepolymer is prepared from isocyanate and terminal hydroxyl polybutadiene.

8. The plate capacitor according to claim 1, characterized in that: The first surface treatment agent material is prepared by the following method: Step S1: vacuumize the polyol at 110-130° C., remove water, and cool to room temperature; Step S2: under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1, and react for 2 hours; Step S3: adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, carbon black, and nanosheet barium titanate to the reactant obtained in step S2 in sequence, and stirring at room temperature to obtain a first surface treatment agent material.

9. A method for preparing a plate capacitor according to any one of claims 1 to 8, characterized in that: The following steps are involved: The rubber material is mixed to obtain a rubber sheet for later use; a first surface treatment agent material is prepared for later use; Cut rubber sheets to specifications; Then, the first surface treatment agent material is rolled or brushed onto the surface of the rubber sheet and allowed to stand to obtain a modified rubber sheet; A second surface treatment agent material is prepared and set aside; the electrode plate is cut according to specifications, and the surface of the electrode plate is sandblasted and degreased; then, the second surface treatment agent material is roller-coated or brushed onto the outer surface of the electrode plate and allowed to stand to obtain a modified electrode plate; stacking at least one layer of modified film as an elastic layer and placing it between the modified electrode plates; Then, the plate capacitor is obtained by placing the plate into a mold, vulcanizing and molding the plate at 135-150°C, and demolding the plate.

10. The method for preparing a plate capacitor according to claim 9, characterized in that: The first surface treatment agent material is applied on the rubber sheet by roller or brush, and the coating amount is controlled to be 20-50g / m 2 .

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