CN108987003B - Preparation method of high-toughness strong heat-resistant mica tape - Google Patents
Preparation method of high-toughness strong heat-resistant mica tape Download PDFInfo
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- CN108987003B CN108987003B CN201810872265.9A CN201810872265A CN108987003B CN 108987003 B CN108987003 B CN 108987003B CN 201810872265 A CN201810872265 A CN 201810872265A CN 108987003 B CN108987003 B CN 108987003B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/02—Drying; Impregnating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
Abstract
The invention relates to a preparation method of a high-toughness strong heat-resistant mica tape, belonging to the technical field of preparation of electric insulating materials. The invention takes the coconut fibers and the bamboo chips as raw materials to prepare a calcined product, the calcined product and organic silane are heated and mixed to obtain modified filter residue, then methyl nadic anhydride, bisphenol A epoxy resin and hydroquinone are mixed to obtain mixed emulsion, the mixed emulsion and the modified filter residue are sprayed on mica paper to be dried to obtain the high-toughness strong heat-resistant mica tape, the nano titanium dioxide particles generated in the invention can be filled in a plant fiber pipe, so that the mechanical properties of plant fibers in the coconut fibers and the bamboo chips are improved, the plant fibers are subjected to coupling modification by the organic silane, the toughness and the impact resistance of the mica tape are further improved, the nano titanium dioxide is filled in the plant fibers and adsorbed on the surfaces of the plant fibers, the high-temperature resistance of the plant fibers is obviously improved after the plant fibers are coated, and the application prospect is wide.
Description
Technical Field
The invention relates to a preparation method of a high-toughness strong heat-resistant mica tape, belonging to the technical field of preparation of electric insulating materials.
Background
The development of modern large and medium-sized high-voltage motor technology puts higher and higher requirements on the insulation performance of the motor. The working temperature, rated power, capacitance and volume of the motor are all obviously increased, the insulating structure needs to bear higher electric stress, mechanical stress, thermal stress and environmental stress, the working environment of the motor is increasingly severe, and the insulating material is required to have better insulation, heat resistance, excellent wear resistance and enough strength.
Mica tape, also called fire-resistant mica tape, is a high-performance mica insulation product. The fireproof insulating material is a coiled fireproof insulating material which is formed by bonding mica paper with an adhesive, reinforcing a plastic film or alkali-free glass cloth, baking, rolling, cutting and the like, and is usually used as an insulating and fireproof layer of a motor and a cable. According to the application, the method comprises the following steps: mica tape for motor and cable. The structure is divided into: double-sided tape, single-sided tape, triple-sided tape, double-film tape, single-film tape, and the like. According to mica, the mica can be divided into: synthetic mica tape, phlogopite tape, and muscovite tape. Because of its excellent high temperature resistance, combustion resistance and voltage resistance, it is commonly used in fire-resistant electric wires and cables. The mica tape is the most important irreplaceable insulating material in the motor, in particular in large-scale and high-voltage motors, wind driven generators and large variable-frequency speed-regulating motors.
The mica paper has good electrical property and mechanical property, good heat resistance and good chemical stability. The mica tape prepared by the mica paper substrate has excellent high temperature resistance and combustion resistance. However, mica paper has poor moisture resistance, is easy to absorb water and deteriorate in a high-humidity environment, and the mica paper processed and formed is poor in fire resistance and tensile toughness and easy to break when being wound around a cable or a motor. The mechanical property, dielectric property, heat conductivity and heat resistance of the mica tape are mainly determined by the performance of the adhesive. In the prior art, the adhesive of the mica tape is mostly based on common epoxy resin modification or common linear polyester resin, the adhesive strength is low, the crosslinking density is low, the compatibility is poor, the mica of the prepared mica tape is low in quantification, easy to fall off, low in breakdown voltage and high in dielectric loss, so that the heat productivity of a motor is large, the ageing resistance performance is poor, the flame retardant performance is poor, and the mica tape is difficult to be applied to the insulation flame retardant of the motor.
The conventional mica tape has the defects of low heat conductivity coefficient, poor mechanical property at the temperature of over 100 ℃ and the like (for example, the bending strength at the temperature of 100 ℃ is only 20-30 MPa). In addition, the mica tape produced by the prior art has the defect that the air permeability of the mica tape with less glue is reduced because the gaps among mica sheets are filled due to the large amount of the adhesive in the mica paper. In the VPI treatment process, rapid permeation of impregnating resin is influenced, air gaps and voids are easily formed in an insulation structure treated by VPI, partial discharge can be generated in the operation process of the motor, and the reliability and the service life of the motor are directly influenced.
Therefore, there is a need to develop a mica tape that can solve the above performance problems.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the defects that the prior mica tape is not good in high temperature resistance and is easy to be decomposed and damaged by heat when in use, and meanwhile, the prior mica tape is poor in toughness and insufficient in impact resistance, so that the mica tape is easy to break and is easy to be damaged by collision, the preparation method of the high-toughness strong-heat-resistant mica tape is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
a preparation method of a high-toughness strong heat-resistant mica tape is characterized by comprising the following specific preparation steps:
(1) placing the coconut shreds and the bamboo chips with equal mass into a beaker, soaking the coconut shreds and the bamboo chips in distilled water, heating the temperature in the beaker at a constant temperature, filtering the heated coconut shreds and the bamboo chips to obtain filter residues, soaking the filter residues in a sodium hydroxide solution for 3-5 hours, filtering the filter residues to obtain filter cakes, washing the filter cakes with distilled water for 3-5 times, and then placing the filter cakes into an oven to dry;
(2) putting the filter cake into a mortar, grinding the filter cake into threads, and weighing the filter cake, tetrabutyl titanate and ethanol solution according to a mass ratio of 3: 1: 10, putting the beaker into a beaker, stirring the beaker for 30-40 min by using a stirrer, putting the beaker into an ultrasonic oscillator for oscillation, and performing suction filtration after ultrasonic oscillation to obtain reaction solid;
(3) putting the reaction solid into a muffle furnace, heating to 230-260 ℃ at a heating rate of 10-15 ℃/min under an argon environment, heating at a constant temperature for 90-100 min to obtain a calcined product, weighing 7-9 parts by weight of the calcined product, 13-15 parts by weight of an ethanol solution with a mass fraction of 40-50% and 2-4 parts by weight of gamma-aminopropyltriethoxysilane into a beaker, putting the beaker into a water bath kettle with a water bath temperature of 80-90 ℃, heating at the constant temperature for 30-40 min, and filtering after heating to obtain modified filter residue;
(4) weighing 1-2 parts of methyl nadic anhydride, 13-15 parts of bisphenol A epoxy resin and 8-10 parts of hydroquinone in parts by weight, putting the mixture into a three-neck flask for condensation and reflux to prepare a condensed reflux liquid, and mixing the condensed reflux liquid with ethylene diamine tetraacetic acid in a mass ratio of 15: 1 putting into a beaker for mixing, and stirring by a stirrer to prepare mixed emulsion;
(5) mixing the mixed emulsion with the standby modified filter residue according to the mass ratio of 15: 1, pouring the mixture into a rubber plate, uniformly mixing, placing the rubber plate into a vacuum drying oven, standing for 4-6 hours at a constant temperature after the temperature of the vacuum drying oven is raised to 180-200 ℃, preparing a reaction colloidal product, uniformly spraying the reaction colloidal substance on mica paper, and placing the mica paper into an oven for drying after spraying to prepare the high-toughness strong heat-resistant mica tape.
The temperature in the beaker in the step (1) is raised to 95-100 ℃, the constant-temperature heating time is 3-5 hours, the mass fraction of the sodium hydroxide solution is 3-5%, the temperature in the oven is 70-80 ℃, and the drying time is 12-14 hours.
The mass fraction of the ethanol solution in the step (2) is 40-50%, the frequency in an ultrasonic oscillator is 35-40 kHz, and the oscillation time is 14-16 h.
And (4) raising the temperature in the muffle furnace in the step (3) to 230-260 ℃ at a temperature raising rate of 10-15 ℃/min, heating at a constant temperature for 90-100 min, and heating at a water bath temperature of 80-90 ℃ for 30-40 min.
The stirring speed in the three-neck flask in the step (4) is 100-120 r/min, the water bath temperature is 80-90 ℃, the condensation reflux time is 70-90 min, the rotating speed of the stirrer is 300-330 r/min, and the stirring time is 30-40 min.
The temperature in the vacuum drying oven in the step (5) is 80-90 ℃, the vacuum degree is 150-200 Pa, the standing time is 60-80 min, the temperature in the oven is 110-120 ℃, and the drying time is 4-6 h.
The beneficial technical effects of the invention are as follows:
(1) the invention firstly mixes the coconut silk and the bamboo chips and puts them into a beaker for heating, then soaks them in alkali liquor, mixes them with tetrabutyl titanate after soaking, puts them into a muffle furnace for high temperature calcination after mixing, and gets the calcined product, heats and mixes the calcined product and organic silane, filters them to get the modified filter residue, then mixes and heats methyl nadic anhydride, bisphenol A type epoxy resin and hydroquinone for condensation reflux to get the mixed emulsion, then mixes the mixed emulsion and the modified filter residue and puts them into a rubber disc for drying, and sprays them on mica paper after drying to get the high tenacity strong heat-resisting mica tape. The tetrabutyl titanate is attached to the fiber before high-temperature reaction, and the plant fiber is in a tubular structure, so that the generated nano titanium dioxide particles can be filled in the plant fiber tube, the mechanical properties of the plant fiber in the coconut shred and the bamboo chip are improved, the toughness and the impact resistance of the mica tape are improved, the plant fiber is modified by coupling of organic silane, the cohesiveness of the plant fiber and a resin material is enhanced, and the toughness and the impact resistance of the mica tape are further improved;
(2) according to the invention, tetrabutyl titanate is soaked and mixed with plant fibers extracted from coconut shreds and bamboo chips, titanium dioxide is generated in a high-temperature calcination mode, nano titanium dioxide is filled into the plant fibers and adsorbed on the surfaces of the plant fibers, the nano titanium dioxide has excellent high-temperature resistance, the high-temperature resistance of the plant fibers is obviously improved after the plant fibers are coated, meanwhile, the plant fibers are modified by utilizing organosilane, and Si-O bonds are introduced into a mica tape, so that the heat resistance of the mica tape is improved, and the mica tape has a wide application prospect.
Detailed Description
Placing the coconut shreds and the bamboo chips with equal mass into a beaker, soaking the coconut shreds and the bamboo chips with distilled water, raising the temperature in the beaker to 95-100 ℃, heating at a constant temperature for 3-5 hours, filtering to obtain filter residues, soaking the filter residues in a sodium hydroxide solution with the mass fraction of 3-5%, filtering to obtain filter cakes after soaking for 3-5 hours, washing the filter cakes with distilled water for 3-5 times, and then placing the filter cakes into an oven with the temperature of 70-80 ℃ for drying for 12-14 hours; putting the filter cake into a mortar, grinding the filter cake into threads, weighing the filter cake, tetrabutyl titanate and 40-50% of ethanol solution according to a mass ratio of 3: 1: 10, putting the beaker into a beaker, stirring the beaker for 30-40 min by using a stirrer, putting the beaker into an ultrasonic oscillator, oscillating the beaker for 14-16 h at the frequency of 35-40 kHz, and performing suction filtration after ultrasonic oscillation to obtain reaction solid; putting the reaction solid into a muffle furnace, heating to 230-260 ℃ at a heating rate of 10-15 ℃/min under an argon environment, heating at a constant temperature for 90-100 min to obtain a calcined product, weighing 7-9 parts by weight of the calcined product, 13-15 parts by weight of an ethanol solution with a mass fraction of 40-50% and 2-4 parts by weight of gamma-aminopropyltriethoxysilane into a beaker, putting the beaker into a water bath kettle with a water bath temperature of 80-90 ℃, heating at the constant temperature for 30-40 min, and filtering after heating to obtain modified filter residue; weighing 1-2 parts by weight of methyl nadic anhydride, 13-15 parts by weight of bisphenol A epoxy resin and 8-10 parts by weight of hydroquinone, putting the mixture into a three-neck flask, carrying out constant-temperature condensation and reflux for 70-90 min under the conditions that the stirring speed is 100-120 r/min and the water bath temperature is 80-90 ℃ to prepare a condensation reflux liquid, and mixing the condensation reflux liquid with ethylenediamine tetraacetic acid according to the mass ratio of 15: 1, putting the mixture into a beaker for mixing, and stirring the mixture for 30 to 40min by a stirrer at the rotating speed of 300 to 330r/min to prepare mixed emulsion; mixing the mixed emulsion with the standby modified filter residue according to the mass ratio of 15: 1, pouring the mixture into a rubber plate, uniformly mixing, placing the rubber plate into a vacuum drying oven, standing for 60-80 min under the conditions that the temperature is 80-90 ℃ and the vacuum degree is 150-200 Pa, raising the temperature of the vacuum drying oven to 180-200 ℃, standing for 4-6 h at constant temperature to obtain a reaction colloidal product, uniformly spraying the reaction colloidal product on mica paper, and placing the mica paper into an oven to dry for 4-6 h at the temperature of 110-120 ℃ to obtain the high-toughness strong heat-resistant mica tape.
Placing the coconut shreds and the bamboo chips with equal mass into a beaker, soaking the coconut shreds and the bamboo chips in distilled water, raising the temperature in the beaker to 95 ℃, heating at a constant temperature for 3 hours, filtering after heating to obtain filter residue, soaking the filter residue in a sodium hydroxide solution with the mass fraction of 3%, filtering after soaking for 3 hours to obtain a filter cake, washing the filter cake with distilled water for 3 times, and then placing the filter cake into an oven with the temperature of 70 ℃ for drying for 12 hours; putting the filter cake into a mortar, grinding the filter cake into threads, weighing the filter cake, tetrabutyl titanate and 40% ethanol solution according to the mass ratio of 3: 1: 10, putting the beaker into a beaker, stirring the beaker for 30min by using a stirrer, putting the beaker into an ultrasonic oscillator, oscillating the beaker for 14h at the frequency of 35kHz, and filtering the beaker after ultrasonic oscillation to obtain reaction solid; putting the reaction solid into a muffle furnace, heating to 230 ℃ at a heating rate of 10 ℃/min under an argon environment, heating at a constant temperature for 90min to obtain a calcined product, weighing 7 parts by weight of the calcined product, 13 parts by weight of an ethanol solution with a mass fraction of 40% and 2 parts by weight of gamma-aminopropyltriethoxysilane into a beaker, putting the beaker into a water bath kettle with a water bath temperature of 80 ℃, heating at the constant temperature for 30min, and filtering after heating to obtain modified filter residue; weighing 1 part of methyl nadic anhydride, 13 parts of bisphenol A epoxy resin and 8 parts of hydroquinone in parts by weight, putting the mixture into a three-neck flask, carrying out constant-temperature condensation and reflux for 70min under the conditions that the stirring speed is 100r/min and the water bath temperature is 80 ℃ to prepare a condensation reflux liquid, and mixing the condensation reflux liquid with ethylenediamine tetraacetic acid according to the mass ratio of 15: 1, putting the mixture into a beaker for mixing, and stirring the mixture for 30min by a stirrer at the rotating speed of 300r/min to prepare mixed emulsion; mixing the mixed emulsion with the standby modified filter residue according to the mass ratio of 15: 1, pouring the mica paper into a rubber plate, uniformly mixing, placing the rubber plate into a vacuum drying oven, standing for 60min under the conditions that the temperature is 80 ℃ and the vacuum degree is 150Pa, raising the temperature of the vacuum drying oven to 180 ℃, standing for 4h at constant temperature to obtain a reaction colloidal product, uniformly spraying the reaction colloidal product on mica paper, and placing the mica paper into an oven after spraying, and drying for 4h under the condition that the temperature is 110 ℃ to obtain the high-toughness strong heat-resistant mica tape.
Placing the coconut shreds and the bamboo chips with equal mass into a beaker, soaking the coconut shreds and the bamboo chips in distilled water, raising the temperature in the beaker to 97 ℃, heating at a constant temperature for 4 hours, filtering after heating to obtain filter residue, soaking the filter residue in a sodium hydroxide solution with the mass fraction of 4%, filtering after soaking for 4 hours to obtain a filter cake, washing the filter cake with distilled water for 4 times, and then placing the filter cake into an oven with the temperature of 75 ℃ for drying for 13 hours; putting the filter cake into a mortar, grinding the filter cake into threads, weighing the filter cake, tetrabutyl titanate and 45 mass percent ethanol solution according to a mass ratio of 3: 1: 10, putting the beaker into a beaker, stirring the beaker for 35min by using a stirrer, putting the beaker into an ultrasonic oscillator, oscillating the beaker for 15h at the frequency of 37kHz, and filtering the beaker after ultrasonic oscillation to obtain reaction solid; putting the reaction solid into a muffle furnace, heating to 245 ℃ at a heating rate of 13 ℃/min under an argon environment, heating at a constant temperature for 95min to obtain a calcined product, weighing 8 parts by weight of the calcined product, 14 parts by weight of 45% ethanol solution and 3 parts by weight of gamma-aminopropyltriethoxysilane into a beaker, placing the beaker into a water bath kettle with a water bath temperature of 85 ℃, heating at the constant temperature for 35min, and filtering after heating to obtain modified filter residue; weighing 1 part of methyl nadic anhydride, 14 parts of bisphenol A epoxy resin and 9 parts of hydroquinone in parts by weight, putting the mixture into a three-neck flask, carrying out constant-temperature condensation and reflux for 80min under the conditions that the stirring speed is 110r/min and the water bath temperature is 85 ℃, preparing a condensation reflux liquid, and mixing the condensation reflux liquid with ethylenediamine tetraacetic acid according to the mass ratio of 15: 1, putting the mixture into a beaker for mixing, and stirring the mixture for 35min by a stirrer at the rotating speed of 315r/min to prepare mixed emulsion; mixing the mixed emulsion with the standby modified filter residue according to the mass ratio of 15: 1, pouring the mica paper into a rubber plate, uniformly mixing, placing the rubber plate into a vacuum drying oven, standing for 70min under the conditions that the temperature is 85 ℃ and the vacuum degree is 175Pa, raising the temperature of the vacuum drying oven to 190 ℃, standing for 5h at constant temperature to obtain a reaction colloidal product, uniformly spraying the reaction colloidal product on mica paper, and placing the mica paper into an oven after spraying, and drying for 5h under the condition that the temperature is 115 ℃ to obtain the high-toughness strong heat-resistant mica tape.
Placing the coconut shreds and the bamboo chips with equal mass into a beaker, soaking the coconut shreds and the bamboo chips in distilled water, raising the temperature in the beaker to 100 ℃, heating at a constant temperature for 5 hours, filtering after heating to obtain filter residue, soaking the filter residue in a sodium hydroxide solution with the mass fraction of 5%, filtering after soaking for 5 hours to obtain a filter cake, washing the filter cake with distilled water for 5 times, and then placing the filter cake into an oven with the temperature of 80 ℃ for drying for 14 hours; putting the filter cake into a mortar, grinding the filter cake into threads, weighing the filter cake, tetrabutyl titanate and 50% ethanol solution according to the mass ratio of 3: 1: 10, putting the beaker into a stirrer, stirring for 40min, putting the beaker into an ultrasonic oscillator, oscillating for 16h at the frequency of 40kHz, and filtering after ultrasonic oscillation to obtain reaction solid; putting the reaction solid into a muffle furnace, heating to 260 ℃ at a heating rate of 15 ℃/min under an argon environment, heating at a constant temperature for 100min to obtain a calcined product, weighing 9 parts by weight of the calcined product, 15 parts by weight of 50% ethanol solution and 4 parts by weight of gamma-aminopropyltriethoxysilane into a beaker, placing the beaker into a water bath kettle with a water bath temperature of 90 ℃, heating at the constant temperature for 40min, and filtering after heating to obtain modified filter residue; weighing 2 parts of methyl nadic anhydride, 15 parts of bisphenol A epoxy resin and 10 parts of hydroquinone in parts by weight, putting the mixture into a three-neck flask, carrying out constant-temperature condensation and reflux for 90min under the conditions that the stirring speed is 120r/min and the water bath temperature is 90 ℃ to prepare a condensation reflux liquid, and mixing the condensation reflux liquid with ethylenediamine tetraacetic acid according to the mass ratio of 15: 1, putting the mixture into a beaker for mixing, and stirring the mixture for 40min by a stirrer at the rotating speed of 330r/min to prepare mixed emulsion; mixing the mixed emulsion with the standby modified filter residue according to the mass ratio of 15: 1, pouring the mica paper into a rubber plate, uniformly mixing, placing the rubber plate into a vacuum drying oven, standing for 80min under the conditions that the temperature is 90 ℃ and the vacuum degree is 200Pa, raising the temperature of the vacuum drying oven to 200 ℃, standing for 6h at constant temperature to obtain a reaction colloidal product, uniformly spraying the reaction colloidal product on mica paper, and placing the mica paper into an oven after spraying, and drying for 6h under the condition that the temperature is 120 ℃ to obtain the high-toughness strong heat-resistant mica tape.
Comparative example mica tape manufactured by a company of Suzhou city was used as a comparative example
The high-toughness strong heat-resistant mica tapes prepared by the method and the mica tapes in the comparative examples are detected, and the detection results are shown in table 1:
tensile strength
The test was carried out with reference to the standard GB/T50192.2-2009.
The thermal conductivity is tested with reference to the standard DIN 52612T 1.
TABLE 1 measurement results of Properties
As can be seen from the data in Table 1, the high-toughness strong heat-resistant mica tape prepared by the invention has the advantages of high strength, good thermal conductivity and strong high temperature resistance, can be used for a long time at 800 ℃, does not generate combustion phenomenon, is an ideal high-temperature-resistant flame-retardant tape-shaped electrical insulating material, and has wide application prospect.
Claims (5)
1. A preparation method of a high-toughness strong heat-resistant mica tape is characterized by comprising the following specific preparation steps:
(1) placing the coconut shreds and the bamboo chips with equal mass into a beaker, soaking the coconut shreds and the bamboo chips in distilled water, heating the temperature in the beaker at a constant temperature, filtering the heated coconut shreds and the bamboo chips to obtain filter residues, soaking the filter residues in a sodium hydroxide solution for 3-5 hours, filtering the filter residues to obtain filter cakes, washing the filter cakes with distilled water for 3-5 times, and then placing the filter cakes into an oven to dry;
(2) putting the filter cake into a mortar, grinding the filter cake into threads, and weighing the filter cake, tetrabutyl titanate and ethanol solution according to a mass ratio of 3: 1: 10, putting the beaker into a beaker, stirring the beaker for 30-40 min by using a stirrer, putting the beaker into an ultrasonic oscillator for oscillation, and performing suction filtration after ultrasonic oscillation to obtain reaction solid;
(3) putting the reaction solid into a muffle furnace, heating to 230-260 ℃ at a heating rate of 10-15 ℃/min under an argon environment, heating at a constant temperature for 90-100 min to obtain a calcined product, weighing 7-9 parts by weight of the calcined product, 13-15 parts by weight of an ethanol solution with a mass fraction of 40-50% and 2-4 parts by weight of gamma-aminopropyltriethoxysilane into a beaker, putting the beaker into a water bath kettle with a water bath temperature of 80-90 ℃, heating at the constant temperature for 30-40 min, and filtering after heating to obtain modified filter residue;
(4) weighing 1-2 parts of methyl nadic anhydride, 13-15 parts of bisphenol A epoxy resin and 8-10 parts of hydroquinone in parts by weight, putting the mixture into a three-neck flask for condensation and reflux to prepare a condensed reflux liquid, and mixing the condensed reflux liquid with ethylene diamine tetraacetic acid in a mass ratio of 15: 1 putting into a beaker for mixing, and stirring by a stirrer to prepare mixed emulsion;
(5) mixing the mixed emulsion with the standby modified filter residue according to the mass ratio of 15: 1, pouring the mixture into a rubber plate, uniformly mixing, placing the rubber plate into a vacuum drying oven, standing for 4-6 hours at a constant temperature after the temperature of the vacuum drying oven is raised to 180-200 ℃, preparing a reaction colloidal product, uniformly spraying the reaction colloidal substance on mica paper, and placing the mica paper into an oven for drying after spraying to prepare the high-toughness strong heat-resistant mica tape.
2. The method for preparing the high-toughness strong heat-resistant mica tape according to claim 1, wherein the method comprises the following steps: the temperature in the beaker in the step (1) is raised to 95-100 ℃, the constant-temperature heating time is 3-5 hours, the mass fraction of the sodium hydroxide solution is 3-5%, the temperature in the oven is 70-80 ℃, and the drying time is 12-14 hours.
3. The method for preparing the high-toughness strong heat-resistant mica tape according to claim 1, wherein the method comprises the following steps: the mass fraction of the ethanol solution in the step (2) is 40-50%, the frequency in an ultrasonic oscillator is 35-40 kHz, and the oscillation time is 14-16 h.
4. The method for preparing the high-toughness strong heat-resistant mica tape according to claim 1, wherein the method comprises the following steps: the stirring speed in the three-neck flask in the step (4) is 100-120 r/min, the water bath temperature is 80-90 ℃, the condensation reflux time is 70-90 min, the rotating speed of the stirrer is 300-330 r/min, and the stirring time is 30-40 min.
5. The method for preparing the high-toughness strong heat-resistant mica tape according to claim 1, wherein the method comprises the following steps: the temperature in the vacuum drying oven in the step (5) is 80-90 ℃, the vacuum degree is 150-200 Pa, the standing time is 60-80 min, the temperature in the oven is 110-120 ℃, and the drying time is 4-6 h.
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| CN102651261A (en) * | 2012-05-28 | 2012-08-29 | 四川美丰云母工业有限责任公司 | Manufacture method of mica paper for capacitor |
| CN103880326A (en) * | 2014-02-18 | 2014-06-25 | 南通中菱绝缘材料有限公司 | Mica paper and production method |
| CN107134328A (en) * | 2017-04-21 | 2017-09-05 | 汪逸凡 | A kind of preparation method of the ageing-resistant mica tape of few glue-type |
| CN108172352A (en) * | 2017-12-01 | 2018-06-15 | 吴义峰 | A kind of preparation method of high heat conduction mica tape |
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2018
- 2018-08-02 CN CN201810872265.9A patent/CN108987003B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010130276A1 (en) * | 2009-05-13 | 2010-11-18 | Loewe-Fuerstenberg Armand | Method and device for producing solid-like, biodegradable fertilizer or soil-loosening agents from municipal and/or industrial sludge |
| CN102651261A (en) * | 2012-05-28 | 2012-08-29 | 四川美丰云母工业有限责任公司 | Manufacture method of mica paper for capacitor |
| CN103880326A (en) * | 2014-02-18 | 2014-06-25 | 南通中菱绝缘材料有限公司 | Mica paper and production method |
| CN107134328A (en) * | 2017-04-21 | 2017-09-05 | 汪逸凡 | A kind of preparation method of the ageing-resistant mica tape of few glue-type |
| CN108172352A (en) * | 2017-12-01 | 2018-06-15 | 吴义峰 | A kind of preparation method of high heat conduction mica tape |
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