CN115116665B - Preparation method of high-temperature-resistant enameled wire - Google Patents
Preparation method of high-temperature-resistant enameled wire Download PDFInfo
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- CN115116665B CN115116665B CN202210915386.3A CN202210915386A CN115116665B CN 115116665 B CN115116665 B CN 115116665B CN 202210915386 A CN202210915386 A CN 202210915386A CN 115116665 B CN115116665 B CN 115116665B
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- temperature
- modified polyester
- imide
- polyamide imide
- enameled wire
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- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000004962 Polyamide-imide Substances 0.000 claims abstract description 73
- 229920002312 polyamide-imide Polymers 0.000 claims abstract description 73
- 239000003973 paint Substances 0.000 claims abstract description 43
- 229920000728 polyester Polymers 0.000 claims abstract description 42
- 229920003055 poly(ester-imide) Polymers 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 239000007788 liquid Substances 0.000 claims description 39
- 239000002250 absorbent Substances 0.000 claims description 30
- 230000002745 absorbent Effects 0.000 claims description 30
- 239000007787 solid Substances 0.000 claims description 28
- 239000010455 vermiculite Substances 0.000 claims description 25
- 229910052902 vermiculite Inorganic materials 0.000 claims description 25
- 235000019354 vermiculite Nutrition 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- POPVULPQMGGUMJ-UHFFFAOYSA-N octasilsesquioxane cage Chemical compound O1[SiH](O[SiH](O2)O[SiH](O3)O4)O[SiH]4O[SiH]4O[SiH]1O[SiH]2O[SiH]3O4 POPVULPQMGGUMJ-UHFFFAOYSA-N 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 claims description 15
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 claims description 15
- KBXJHRABGYYAFC-UHFFFAOYSA-N octaphenylsilsesquioxane Chemical compound O1[Si](O2)(C=3C=CC=CC=3)O[Si](O3)(C=4C=CC=CC=4)O[Si](O4)(C=5C=CC=CC=5)O[Si]1(C=1C=CC=CC=1)O[Si](O1)(C=5C=CC=CC=5)O[Si]2(C=2C=CC=CC=2)O[Si]3(C=2C=CC=CC=2)O[Si]41C1=CC=CC=C1 KBXJHRABGYYAFC-UHFFFAOYSA-N 0.000 claims description 14
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 210000003298 dental enamel Anatomy 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 150000002466 imines Chemical class 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000010907 mechanical stirring Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- -1 amide imide Chemical class 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 10
- 238000010292 electrical insulation Methods 0.000 abstract description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 109
- 239000010410 layer Substances 0.000 description 53
- 239000001856 Ethyl cellulose Substances 0.000 description 32
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 32
- 229920001249 ethyl cellulose Polymers 0.000 description 32
- 235000019325 ethyl cellulose Nutrition 0.000 description 32
- 239000002245 particle Substances 0.000 description 23
- ZOYFEXPFPVDYIS-UHFFFAOYSA-N trichloro(ethyl)silane Chemical compound CC[Si](Cl)(Cl)Cl ZOYFEXPFPVDYIS-UHFFFAOYSA-N 0.000 description 22
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 20
- 238000001035 drying Methods 0.000 description 16
- 238000005507 spraying Methods 0.000 description 16
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 14
- 229910000077 silane Inorganic materials 0.000 description 14
- 239000012798 spherical particle Substances 0.000 description 14
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 11
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 9
- 239000001099 ammonium carbonate Substances 0.000 description 9
- 235000012501 ammonium carbonate Nutrition 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006664 bond formation reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000413 hydrolysate Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000003949 imides Chemical group 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 125000006000 trichloroethyl group Chemical group 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/305—Polyamides or polyesteramides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention belongs to the technical field of enameled wires, and particularly relates to a preparation method of a high-temperature-resistant enameled wire, wherein modified polyester and polyamide imide are used as paint film layers to be alternately coated to form a laminated composite laminated structure; and the number of stacked layers is not less than 10, and the number of layers of the modified polyester and the polyamide-imide is not less than 5. The invention solves the problem of poor temperature resistance of the traditional enameled wire, utilizes modified polyester and polyamide imide to form an alternating paint film structure, and ensures the rigidity and the electrical insulation performance of the insulating paint layer, ensures the enameled wire to have better softening and breakdown resistance and improves the heat resistance and the electrical insulation performance of the product by means of performance complementation and structure clamping.
Description
Technical Field
The invention belongs to the technical field of enameled wires, and particularly relates to a preparation method of a high-temperature-resistant enameled wire.
Background
Enameled wires are a main variety of winding wires, generally composed of two parts of a conductor and an insulating layer, and the application fields of the enameled wires include induction coils, electromagnetic coils, alternating current and direct current motors, automobile industry and the like. At present, the production of enamelled wires in China is mainly focused on varieties such as polyester, polyurethane, polyester imine and the like. The polyamide imide wire enamel is high-temperature-resistant wire enamel with excellent comprehensive performance, and is one of main varieties of high-temperature-resistant wire enamel with over 200 grades in the world. The heat-resistant and heat-resistant paint not only maintains high heat resistance and long-term use performance at 200 ℃, but also has good mechanical property, chemical corrosion resistance and refrigerant resistance, greatly improves the adhesiveness and flexibility with conductors, and improves the wear resistance, and the mechanical property of a paint film is well balanced. However, with the development of technology, the use environment of the polyamideimide enameled wire is more and more severe, and particularly, the polyamideimide is not easy to soften under the high-temperature condition, but has a higher dielectric constant, and a charge channel is easy to form and break down. Therefore, there is a need for a high temperature resistant enameled wire to meet the current requirements of the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the preparation method of the high-temperature-resistant enameled wire, which solves the problem of poor temperature resistance of the existing enameled wire, utilizes modified polyester and polyamide imide to form an alternating paint film structure, ensures the rigidity and the electrical insulation performance of an insulating paint layer in a manner of performance complementation and structure clamping, ensures the enameled wire to have better softening and breakdown resistance, and improves the heat resistance and the electrical insulation performance of products.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a preparation method of high temperature resistance enameled wire, take modified polyester and polyamide imide as paint film layer and alternately coat and form the laminated composite lamellar structure; and the thickness of the paint film layer is 1-3 mu m, the number of stacked layers is not less than 10, and the number of the modified polyester and the polyamide imide is not less than 5.
The structure has good softening breakdown resistance. The modified polyester has low dielectric constant at high temperature, but is easy to soften, the paint layer becomes thinner under the action of pressure, and the polyamide imide has higher dielectric constant and is easy to form charge channels to break down although the polyamide imide is not easy to soften at high temperature. Therefore, when the modified polyester and the polyamideimide form a laminate structure, the respective advantages of the two can be utilized to offset the respective disadvantages. The adjacent polyamide imide layers have the characteristic of difficult softening, a stable growth structure is maintained, the modified polyester is clamped by the polyamide imide layers, high-temperature deformation is not formed, the problem of high-temperature softening and thinning is solved, the layered structure of the modified polyester is maintained, and further, the polyester layer has better electric insulation capability between the polyamide imides, so that electric breakdown is effectively prevented. Therefore, the modified polyester and the polyamide imide form complementation in structure and performance, so that the rigidity and the electrical insulation performance of the insulating paint layer are ensured, the enameled wire has better softening breakdown resistance, and the heat resistance and the electrical insulation performance of the product are improved.
Furthermore, the polyamide imide is coated by adopting a polyamide imide solution with N-methyl pyrrolidone as a solvent; the preparation method of the polyamide imide solution comprises the following steps: a1, dissolving pyromellitic anhydride and trimellitic anhydride in N-methyl pyrrolidone, adding a solid water absorbent under the protection of nitrogen, and stirring at constant temperature for 0.5h to obtain a solution; the molar ratio of the pyromellitic anhydride to the trimellitic anhydride is 1:10-30, and the constant-temperature stirring temperature is 75-80 ℃, preferably 80 ℃; the solid water absorbent adopts an alumina-based vermiculite water absorbent, namely, alumina is used as a mesoporous shell layer, vermiculite is used as a water absorbing material to form a shell-core wrapping system, in the use process, N-methyl pyrrolidone has hygroscopicity, so that the solid water absorbent contains a small amount of water molecules, adverse effects are caused on the reaction, the alumina-based vermiculite water absorbent can quickly absorb the water molecules in a solvent, the effect of quick water removal is achieved, and meanwhile, in order to ensure the water absorption expansion characteristic of the vermiculite and the requirement of quick separation, a space exists between the vermiculite and the alumina, the water absorption capacity of the vermiculite is provided, and meanwhile, the structural size of the solid water absorbent is increased, so that the diameter of the solid water absorbent is 3-5mm; a2, adding diphenylmethane diisocyanate, maintaining the temperature and stirring for 3 hours, heating to react until the solution is transparent, filtering while the solution is hot, and cooling to obtain a solid water absorbent and a polyamide-imide prefabricated liquid; the ratio of the molar quantity of the diphenylmethane diisocyanate to the total molar quantity of the pyromellitic anhydride and the trimellitic anhydride is 1-1.05:1, the solid-liquid property difference of the solid water absorbent is utilized to form separation, meanwhile, the solid water absorbent with a spherical structure does not influence the solution, the separation is difficult, and the stable polyamide-imide prefabricated liquid is obtained; a3, adding octaphenyl octasilsesquioxane into the polyamide-imide prefabricated liquid for low-temperature dispersion to obtain a polyamide-imide solution, wherein the concentration of octaphenyl octasilsesquioxane in the polyamide-imide prefabricated liquid is 5-10g/L, low-temperature ultrasonic is adopted for low-temperature dispersion, the ultrasonic frequency is 30-50kHz, and the temperature is 5-10 ℃; the octaphenyl octasilsesquioxane is uniformly dispersed into the polyamide imide by adopting a low-temperature ultrasonic mode, and the dispersibility is stable based on the self viscosity of the polymer.
Further, the preparation method of the solid water absorbing agent comprises the following steps: b1, mixing vermiculite with ethyl cellulose and micro-nano ammonium carbonate, adding silane diethyl ether liquid, stirring to form slurry, then placing the slurry into a mould, and extruding to form spherical particles, wherein the mass ratio of the vermiculite to the ethyl cellulose is 10:1, the mass of the ammonium carbonate is 3% of the mass of the ethyl cellulose, the silane in the silane diethyl ether liquid adopts trichloroethyl silane, the concentration of the trichloroethyl silane in diethyl ether is 5g/L, the mass of the silane diethyl ether liquid to the ethyl cellulose is 5:1, the extrusion temperature is 40 ℃, and the pressure is 0.13MPa; the method comprises the steps of utilizing the solubility of diethyl ether to ethyl cellulose to form viscous slurry, removing diethyl ether in constant-temperature extrusion, and integrating to form spherical particles; b2, coating ethylcellulose-diethyl ether liquid on the surfaces of the spherical particles, then drying at constant temperature, and repeating for a plurality of times until the diameters of the spherical particles are doubled to obtain the particle balls; the mass ratio of the ethyl cellulose to the diethyl ether in the ethyl cellulose diethyl ether liquid is 2:5, and the constant-temperature drying temperature is 40 ℃; the method utilizes the solubility and volatility of diethyl ether to achieve the deposition of ethyl cellulose on the surfaces of spherical particles and the coating effect; meanwhile, stable compatible connection is formed by utilizing the homogeneity of the ethyl cellulose, so that a stable and compact connection effect is achieved; b3, dissolving ethyl trichlorosilane in diethyl ether to form a dissolving solution, spraying the dissolving solution onto the surfaces of the particle balls, and drying to obtain coated particle balls; then adding aluminum isopropoxide into isopropanol, stirring uniformly, and spraying to the surfaces of the coated particles to form secondary coating, thus obtaining double-coated particlesPellets, the concentration of the ethyl trichlorosilane in the diethyl ether is 50g/L, and the spraying amount is 5mL/cm 2 The drying temperature is 40 ℃, the concentration of the aluminum isopropoxide in the isopropanol is 80g/L, and the spraying amount is 5mL/cm 2 The method comprises the steps of utilizing the solubility of diethyl ether to ethyl cellulose, ensuring that ethyl trichlorosilane is deposited on the surface of the ethyl cellulose, and forming an ethyl trichlorosilane liquid film on the surface after diethyl ether is dried and removed; as aluminum isopropoxide is sprayed to the surface, the insoluble characteristic of isopropanol and ethyl trichlorosilane ensures that aluminum isopropoxide forms a stable liquid film on the surface, thereby achieving a liquid film structure wrapped layer by layer; b4, placing the double-coated particle balls into a reaction kettle, standing for 10min, heating for 30min, taking out and sintering to obtain the solid water absorbent with a shell-core structure, wherein the atmosphere of the reaction kettle is the atmosphere of nitrogen and water vapor, the volume ratio of the water vapor is 8%, and the temperature of the standing treatment is 40 ℃; the temperature of the heating treatment is 90 ℃, and the temperature of the sintering treatment is 600 ℃; the method comprises the steps of utilizing the adsorbability of isopropanol to water to quickly absorb water molecules in air, promoting aluminum isopropoxide and ethyl trichlorosilane to form in-situ hydrolysis, forming a stable cross-linking structure in the heating treatment process, providing a precursor condition for the subsequent formation of a surface layer taking aluminum oxide as a shell and taking a silicon-oxygen three-dimensional material as a frame, meanwhile, forming micro-nano ammonium carbonate to decompose in the heating process to generate water molecules, forming hydrolysis reaction between the water molecules and the ethyl trichlorosilane at the moment, and primarily fixing vermiculite, wherein the water absorption expansion is not influenced by the fact that the vermiculite is locally fixed in a small amount based on the small content of the ethyl trichlorosilane; at the moment, water molecules are absorbed by vermiculite and transferred to the ethyl trichlorosilane to form a reaction; in the sintering process, the ethyl cellulose is heated to decompose and completely removed, and the hydrolysate on the surface layer forms hydroxyl polymerization to finally form a stable mesoporous structure. The process fully utilizes the hydrophobicity of the ethyl cellulose, achieves synchronous hydrolysis reaction under the condition of internal and external intervals, simultaneously forms a surface layer and an inner core, and achieves a shell-core structure with a space when the ethyl cellulose is removed so as to meet the expansion requirement of vermiculite.
The modified polyester adopts modified polyester imide paint containing octavinyl octasilsesquioxane, octavinyl octasilsesquioxane is uniformly dispersed in the polyester paint, stable dispersibility is formed in a polyester system, a modified polyester layer and a polyamide imide layer are staggered to form a coating layer, octavinyl octasilsesquioxane and octaphenyl octasilsesquioxane form a crosslinking reaction at a connecting surface at high temperature, and a silicon-oxygen system structure is achieved by utilizing a vinyl and silicon-hydrogen bond forming reaction, namely, a silicon-oxygen connecting structure taking octasilsesquioxane as a main body is formed between the polyester layer and the polyamide imide layer at intervals, so that the electrical performance and breakdown temperature between the octavinyl octasilsesquioxane and the polyamide imide layer are greatly improved. The mass ratio of the modified polyester is as follows: 4-5 parts of octavinyl octasilsesquioxane and 40-50 parts of modified polyester imide paint, and uniformly mixing the octavinyl octasilsesquioxane and the modified polyester imide paint in a mechanical stirring manner to obtain the modified polyester paint.
According to the preparation method of the high-temperature-resistant enameled wire, polyamide imide and modified polyester are alternately coated outside the bare copper wire, baking and curing are carried out after each coating, so that the prefabricated enameled wire can be obtained, and finally, the surface of the enameled wire is coated with a layer of surface lubricant, so that the enameled wire can be tightly arranged when the enameled wire is wound, and a user can conveniently wind a coil.
Further, the baking and curing process is carried out from the lower layer of the baking furnace to the lower layer, the inlet temperature of the baking furnace is 155+/-5 ℃, the temperature of the lower layer of the baking furnace is 260+/-5 ℃, the curing temperature is 400+/-5 ℃, the main circulating fan is 1200r/min, the waste discharge fan is 980r/min, and the lower furnace mouth fan is 740r/min.
From the above description, it can be seen that the present invention has the following advantages:
1. the invention solves the problem of poor temperature resistance of the traditional enameled wire, utilizes modified polyester and polyamide imide to form an alternating paint film structure, and ensures the rigidity and the electrical insulation performance of the insulating paint layer, ensures the enameled wire to have better softening and breakdown resistance and improves the heat resistance and the electrical insulation performance of the product by means of performance complementation and structure clamping.
2. According to the invention, octavinyl octasilsesquioxane and octaphenyl octasilsesquioxane are utilized to form a POSS-based composite connection structure, and a silicon-oxygen connection structure taking octasilsesquioxane as a main body is formed between a polyester layer and a polyamide imide layer at intervals, so that the electrical performance and breakdown temperature between the polyester layer and the polyamide imide layer are greatly improved.
Detailed Description
The invention is described in detail with reference to examples, but without any limitation to the claims of the invention.
A preparation method of high temperature resistance enameled wire, take modified polyester and polyamide imide as paint film layer and alternately coat and form the laminated composite lamellar structure; and the thickness of the paint film layer is 3 mu m, the number of stacked layers is 10, and each of the modified polyester and the polyamide imide is 5.
The polyamide imide is formed by coating a polyamide imide solution with N-methyl pyrrolidone as a solvent; the preparation method of the polyamide imide solution comprises the following steps: a1, dissolving pyromellitic anhydride and trimellitic anhydride in N-methyl pyrrolidone, adding a solid water absorbent under the protection of nitrogen, and stirring at constant temperature for 0.5h to obtain a solution; the molar ratio of the pyromellitic anhydride to the trimellitic anhydride is 1:10, and the constant-temperature stirring temperature is 75 ℃; the solid water absorbent adopts an alumina-based vermiculite water absorbent, namely, alumina is used as a mesoporous shell layer, and vermiculite is used as a water absorbing material to form a shell-core wrapping system; a2, adding diphenylmethane diisocyanate, maintaining the temperature and stirring for 3 hours, heating to react until the solution is transparent, filtering while the solution is hot, and cooling to obtain a solid water absorbent and a polyamide-imide prefabricated liquid; the ratio of the molar quantity of the diphenylmethane diisocyanate to the total molar quantity of the pyromellitic anhydride and the trimellitic anhydride is 1:1, a3, octaphenyl octasilsesquioxane is added into the polyamide imide prefabricated liquid to be dispersed at a low temperature to obtain a polyamide imide solution, the concentration of the octaphenyl octasilsesquioxane in the polyamide imide prefabricated liquid is 5g/L, low-temperature ultrasonic is adopted for low-temperature dispersion, the ultrasonic frequency is 30kHz, and the temperature is 5 ℃.
Wherein the preparation method of the solid water absorbing agent comprises the following steps: b1, mixing vermiculite, ethyl cellulose and micro-nano ammonium carbonate, adding silane-diethyl ether liquid, stirring to form slurry, and then placing the slurry into a mould for extrusion to form spherical particles, wherein the mass ratio of the vermiculite to the ethyl cellulose is 10:1, and the mass ratio of the ammonium carbonate is 10:13% of the mass of ethyl cellulose, wherein the silane in the silane diethyl ether liquid adopts trichloroethyl silane, the concentration of the trichloroethyl silane in diethyl ether is 5g/L, the mass of the silane diethyl ether liquid and the mass of the ethyl cellulose are 5:1, the extrusion temperature is 40 ℃, and the pressure is 0.13MPa; b2, coating ethylcellulose-diethyl ether liquid on the surfaces of the spherical particles, then drying at constant temperature, and repeating for a plurality of times until the diameters of the spherical particles are doubled to obtain the particle balls; the mass ratio of the ethyl cellulose to the diethyl ether in the ethyl cellulose diethyl ether liquid is 2:5, and the constant-temperature drying temperature is 40 ℃; b3, dissolving ethyl trichlorosilane in diethyl ether to form a dissolving solution, spraying the dissolving solution onto the surfaces of the particle balls, and drying to obtain coated particle balls; then adding aluminum isopropoxide into isopropanol, stirring uniformly, and spraying to the surface of the coated particle ball to form a secondary coating, thereby obtaining a double-coated particle ball, wherein the concentration of the ethyl trichlorosilane in the diethyl ether is 50g/L, and the spraying amount is 5mL/cm 2 The drying temperature is 40 ℃, the concentration of the aluminum isopropoxide in the isopropanol is 80g/L, and the spraying amount is 5mL/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the b4, placing the double-coated particle balls into a reaction kettle, standing for 10min, heating for 30min, taking out and sintering to obtain the solid water absorbent with a shell-core structure, wherein the atmosphere of the reaction kettle is the atmosphere of nitrogen and water vapor, the volume ratio of the water vapor is 8%, and the temperature of the standing treatment is 40 ℃; the temperature of the heating treatment is 90 ℃ and the temperature of the sintering treatment is 600 ℃.
The modified polyester adopts modified polyester imine paint containing octavinyl octasilsesquioxane; the mass ratio of the modified polyester is as follows: and (3) 4 parts of octavinyl octasilsesquioxane and 40 parts of modified polyester imide paint (RT 9669T modified polyimide insulating paint), and uniformly mixing the octavinyl octasilsesquioxane and the modified polyester imide paint in a mechanical stirring mode to obtain the modified polyester paint.
According to the preparation method of the high-temperature-resistant enameled wire, polyamide imide and modified polyester are alternately coated outside the bare copper wire, baking and curing are carried out after each coating, so that a prefabricated enameled wire can be obtained, and finally, a layer of surface lubricant is coated on the surface of the enameled wire, so that the enameled wire can be tightly arranged when the enameled wire is wound, and a user can conveniently wind a coil; the baking solidification process is that the baking furnace passes through the lower layer from the lower layer of the baking furnace, the inlet temperature of the baking furnace is 155+/-5 ℃, the temperature of the lower layer of the baking furnace is 260+/-5 ℃, the solidifying temperature is 400+/-5 ℃, the main circulation fan is 1200r/min, the waste discharge fan is 980r/min, and the lower furnace mouth fan is 740r/min.
Example 2
A preparation method of high temperature resistance enameled wire, take modified polyester and polyamide imide as paint film layer and alternately coat and form the laminated composite lamellar structure; and the thickness of the paint film layer is 1 mu m, the number of stacked layers is 20, and 10 layers of modified polyester and polyamide imide are respectively formed.
The polyamide imide is formed by coating a polyamide imide solution with N-methyl pyrrolidone as a solvent; the preparation method of the polyamide imide solution comprises the following steps: a1, dissolving pyromellitic anhydride and trimellitic anhydride in N-methyl pyrrolidone, adding a solid water absorbent under the protection of nitrogen, and stirring at constant temperature for 0.5h to obtain a solution; the molar ratio of the pyromellitic anhydride to the trimellitic anhydride is 1:30, and the constant-temperature stirring temperature is 80 ℃; the solid water absorbent adopts an alumina-based vermiculite water absorbent, namely, alumina is used as a mesoporous shell layer, and vermiculite is used as a water absorbing material to form a shell-core wrapping system; a2, adding diphenylmethane diisocyanate, maintaining the temperature and stirring for 3 hours, heating to react until the solution is transparent, filtering while the solution is hot, and cooling to obtain a solid water absorbent and a polyamide-imide prefabricated liquid; the ratio of the molar quantity of the diphenylmethane diisocyanate to the total molar quantity of the pyromellitic anhydride and the trimellitic anhydride is 1.05:1, a3, octaphenyl octasilsesquioxane is added into the polyamide imide prefabricated liquid to be dispersed at a low temperature to obtain a polyamide imide solution, the concentration of the octaphenyl octasilsesquioxane in the polyamide imide prefabricated liquid is 10g/L, low-temperature ultrasonic is adopted for low-temperature dispersion, the ultrasonic frequency is 50kHz, and the temperature is 10 ℃.
Wherein the preparation method of the solid water absorbing agent comprises the following steps: b1, mixing vermiculite, ethyl cellulose and micro-nano ammonium carbonate, adding silane-diethyl ether liquid, stirring to form slurry, and then placing the slurry into a mould for extrusion to form spherical particles, wherein the mass ratio of the vermiculite to the ethyl cellulose is 10:1, the mass of the ammonium carbonate is 3% of the mass of the ethyl cellulose, and the silane-diethyl ether liquidThe silane in (1) adopts trichloroethyl silane, the concentration of the trichloroethyl silane in diethyl ether is 5g/L, the mass ratio of the silane diethyl ether liquid to the ethyl cellulose is 5:1, the extrusion temperature is 40 ℃, and the pressure is 0.13MPa; b2, coating ethylcellulose-diethyl ether liquid on the surfaces of the spherical particles, then drying at constant temperature, and repeating for a plurality of times until the diameters of the spherical particles are doubled to obtain the particle balls; the mass ratio of the ethyl cellulose to the diethyl ether in the ethyl cellulose diethyl ether liquid is 2:5, and the constant-temperature drying temperature is 40 ℃; b3, dissolving ethyl trichlorosilane in diethyl ether to form a dissolving solution, spraying the dissolving solution onto the surfaces of the particle balls, and drying to obtain coated particle balls; then adding aluminum isopropoxide into isopropanol, stirring uniformly, and spraying to the surface of the coated particle ball to form a secondary coating, thereby obtaining a double-coated particle ball, wherein the concentration of the ethyl trichlorosilane in the diethyl ether is 50g/L, and the spraying amount is 5mL/cm 2 The drying temperature is 40 ℃, the concentration of the aluminum isopropoxide in the isopropanol is 80g/L, and the spraying amount is 5mL/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the b4, placing the double-coated particle balls into a reaction kettle, standing for 10min, heating for 30min, taking out and sintering to obtain the solid water absorbent with a shell-core structure, wherein the atmosphere of the reaction kettle is the atmosphere of nitrogen and water vapor, the volume ratio of the water vapor is 8%, and the temperature of the standing treatment is 40 ℃; the temperature of the heating treatment is 90 ℃ and the temperature of the sintering treatment is 600 ℃.
The modified polyester adopts modified polyester imine paint containing octavinyl octasilsesquioxane; the mass ratio of the modified polyester is as follows: and (3) mixing 5 parts of octavinyl octasilsesquioxane and 50 parts of modified polyester imide paint (RT 9669T modified polyimide insulating paint) uniformly by a mechanical stirring mode to obtain the modified polyester paint.
According to the preparation method of the high-temperature-resistant enameled wire, polyamide imide and modified polyester are alternately coated outside the bare copper wire, baking and curing are carried out after each coating, so that a prefabricated enameled wire can be obtained, and finally, a layer of surface lubricant is coated on the surface of the enameled wire, so that the enameled wire can be tightly arranged when the enameled wire is wound, and a user can conveniently wind a coil; the baking solidification process is that the baking furnace passes through the lower layer from the lower layer of the baking furnace, the inlet temperature of the baking furnace is 155+/-5 ℃, the temperature of the lower layer of the baking furnace is 260+/-5 ℃, the solidifying temperature is 400+/-5 ℃, the main circulation fan is 1200r/min, the waste discharge fan is 980r/min, and the lower furnace mouth fan is 740r/min.
Example 3
A preparation method of high temperature resistance enameled wire, take modified polyester and polyamide imide as paint film layer and alternately coat and form the laminated composite lamellar structure; and the thickness of the paint film layer is 2 mu m, the number of stacked layers is 20, and 10 layers of modified polyester and polyamide imide are respectively formed.
The polyamide imide is formed by coating a polyamide imide solution with N-methyl pyrrolidone as a solvent; the preparation method of the polyamide imide solution comprises the following steps: a1, dissolving pyromellitic anhydride and trimellitic anhydride in N-methyl pyrrolidone, adding a solid water absorbent under the protection of nitrogen, and stirring at constant temperature for 0.5h to obtain a solution; the molar ratio of the pyromellitic anhydride to the trimellitic anhydride is 1:20, and the constant-temperature stirring temperature is 80 ℃; the solid water absorbent adopts an alumina-based vermiculite water absorbent, namely, alumina is used as a mesoporous shell layer, and vermiculite is used as a water absorbing material to form a shell-core wrapping system; a2, adding diphenylmethane diisocyanate, maintaining the temperature and stirring for 3 hours, heating to react until the solution is transparent, filtering while the solution is hot, and cooling to obtain a solid water absorbent and a polyamide-imide prefabricated liquid; the ratio of the molar quantity of the diphenylmethane diisocyanate to the total molar quantity of the pyromellitic anhydride and the trimellitic anhydride is 1:1, a3, octaphenyl octasilsesquioxane is added into the polyamide imide prefabricated liquid to be dispersed at a low temperature to obtain a polyamide imide solution, the concentration of the octaphenyl octasilsesquioxane in the polyamide imide prefabricated liquid is 8g/L, low-temperature ultrasonic is adopted for low-temperature dispersion, the ultrasonic frequency is 40kHz, and the temperature is 8 ℃.
Wherein the preparation method of the solid water absorbing agent comprises the following steps: b1, mixing vermiculite, ethyl cellulose and micro-nano ammonium carbonate, adding silane diethyl ether liquid, stirring to form slurry, then placing into a mould, extruding to form spherical particles, wherein the mass ratio of the vermiculite to the ethyl cellulose is 10:1, the mass of the ammonium carbonate is 3% of the mass of the ethyl cellulose, and the silane in the silane diethyl ether liquid adopts trichloroethyl silane, and trichloroethyl silaneThe concentration of the silane in the diethyl ether is 5g/L, the mass ratio of the silane diethyl ether liquid to the ethyl cellulose is 5:1, the extrusion temperature is 40 ℃, and the pressure is 0.13MPa; b2, coating ethylcellulose-diethyl ether liquid on the surfaces of the spherical particles, then drying at constant temperature, and repeating for a plurality of times until the diameters of the spherical particles are doubled to obtain the particle balls; the mass ratio of the ethyl cellulose to the diethyl ether in the ethyl cellulose diethyl ether liquid is 2:5, and the constant-temperature drying temperature is 40 ℃; b3, dissolving ethyl trichlorosilane in diethyl ether to form a dissolving solution, spraying the dissolving solution onto the surfaces of the particle balls, and drying to obtain coated particle balls; then adding aluminum isopropoxide into isopropanol, stirring uniformly, and spraying to the surface of the coated particle ball to form a secondary coating, thereby obtaining a double-coated particle ball, wherein the concentration of the ethyl trichlorosilane in the diethyl ether is 50g/L, and the spraying amount is 5mL/cm 2 The drying temperature is 40 ℃, the concentration of the aluminum isopropoxide in the isopropanol is 80g/L, and the spraying amount is 5mL/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the b4, placing the double-coated particle balls into a reaction kettle, standing for 10min, heating for 30min, taking out and sintering to obtain the solid water absorbent with a shell-core structure, wherein the atmosphere of the reaction kettle is the atmosphere of nitrogen and water vapor, the volume ratio of the water vapor is 8%, and the temperature of the standing treatment is 40 ℃; the temperature of the heating treatment is 90 ℃ and the temperature of the sintering treatment is 600 ℃.
The modified polyester adopts modified polyester imine paint containing octavinyl octasilsesquioxane; the mass ratio of the modified polyester is as follows: 4 parts of octavinyl octasilsesquioxane and 45 parts of modified polyester imide paint (RT 9669T modified polyimide insulating paint), and uniformly mixing the two by a mechanical stirring mode to obtain the modified polyester paint.
According to the preparation method of the high-temperature-resistant enameled wire, polyamide imide and modified polyester are alternately coated outside the bare copper wire, baking and curing are carried out after each coating, so that a prefabricated enameled wire can be obtained, and finally, a layer of surface lubricant is coated on the surface of the enameled wire, so that the enameled wire can be tightly arranged when the enameled wire is wound, and a user can conveniently wind a coil; the baking solidification process is that the baking furnace passes through the lower layer from the lower layer of the baking furnace, the inlet temperature of the baking furnace is 155+/-5 ℃, the temperature of the lower layer of the baking furnace is 260+/-5 ℃, the solidifying temperature is 400+/-5 ℃, the main circulation fan is 1200r/min, the waste discharge fan is 980r/min, and the lower furnace mouth fan is 740r/min.
The following tests were carried out using the products of examples 1-3 as test examples and using the commercially available polyamideimide enameled wire products as comparative examples:
| example 1 | Example 2 | Example 3 | Comparative example | |
| Adhesion property | Good quality | Good quality | Good quality | Good quality |
| Breakdown voltage KV | 4.15 | 4.31 | 4.23 | 3.93 |
| Softening breakdown (DEG C) | 452 | 468 | 465 | 376 |
| High temperature and high humidity testing | Qualified product | Qualified product | Qualified product | Qualified product |
It is to be understood that the foregoing detailed description of the invention is merely illustrative of the invention and is not limited to the embodiments of the invention. It will be understood by those of ordinary skill in the art that the present invention may be modified or substituted for elements thereof to achieve the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.
Claims (6)
1. A preparation method of a high temperature resistance enameled wire is characterized by comprising the following steps of: alternately coating modified polyester and polyamide imide as paint film layers to form a laminated composite laminated structure; and the number of stacked layers is not less than 10, and the number of the layers of the modified polyester and the polyamide imide is not less than 5 respectively;
the polyamide imide is formed by coating a polyamide imide solution with N-methyl pyrrolidone as a solvent; the amide imide contains octaphenyl octasilsesquioxane;
the preparation method of the polyamide imide solution comprises the following steps: a1, dissolving pyromellitic anhydride and trimellitic anhydride in N-methyl pyrrolidone, adding a solid water absorbent under the protection of nitrogen, and stirring at constant temperature for 0.5h to obtain a solution; the molar ratio of the pyromellitic anhydride to the trimellitic anhydride is 1:10-30, and the constant-temperature stirring temperature is 75-80 ℃; the solid water absorbent adopts an alumina-based vermiculite water absorbent, a2, diphenylmethane diisocyanate is added, the temperature is kept for stirring for 3 hours, the temperature is raised to react until the solution is transparent, and the solid water absorbent and the polyamide-imide prefabricated liquid are obtained after filtering while the solution is hot; the ratio of the molar quantity of the diphenylmethane diisocyanate to the total molar quantity of the pyromellitic anhydride and the trimellitic anhydride is 1-1.05:1, a3, octaphenyl octasilsesquioxane is added into the polyamide imide prefabricated liquid to be dispersed at a low temperature to obtain a polyamide imide solution, the concentration of the octaphenyl octasilsesquioxane in the polyamide imide prefabricated liquid is 5-10g/L, low-temperature ultrasonic is adopted for low-temperature dispersion, the ultrasonic frequency is 30-50kHz, and the temperature is 5-10 ℃.
2. The method for manufacturing a high temperature resistant enamel wire according to claim 1, characterized in that: the thickness of the paint film layer is 1-3 mu m.
3. The method for manufacturing a high temperature resistant enamel wire according to claim 1, characterized in that: the modified polyester adopts modified polyester imine paint containing octavinyl octasilsesquioxane.
4. The method for manufacturing a high temperature resistant enamel wire according to claim 3, wherein: the mass ratio of the modified polyester is as follows: 4-5 parts of octavinyl octasilsesquioxane and 40-50 parts of modified polyester imide paint, and uniformly mixing the octavinyl octasilsesquioxane and the modified polyester imide paint in a mechanical stirring manner to obtain the modified polyester paint.
5. The method for manufacturing a high temperature resistant enamel wire according to claim 1, characterized in that: according to the preparation method of the high-temperature-resistant enameled wire, polyamide imide and modified polyester are alternately coated outside the bare copper wire, baking and curing are carried out after each coating, so that the prefabricated enameled wire can be obtained, and finally, the surface of the enameled wire is coated with a layer of surface lubricant, so that the enameled wire can be tightly arranged when the enameled wire is wound, and a user can conveniently wind a coil.
6. The method for manufacturing a high temperature resistant enamel wire according to claim 5, wherein: the baking solidification process is that the baking furnace passes through the lower layer from the lower layer of the baking furnace, the inlet temperature of the baking furnace is 155+/-5 ℃, the temperature of the lower layer of the baking furnace is 260+/-5 ℃, the solidifying temperature is 400+/-5 ℃, the main circulation fan is 1200r/min, the waste discharge fan is 980r/min, and the lower furnace mouth fan is 740r/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204257239U (en) * | 2014-12-30 | 2015-04-08 | 浙江洪波科技股份有限公司 | High-temperature resistant enamelled wire |
| CN106543652A (en) * | 2015-09-18 | 2017-03-29 | 上海东升新材料有限公司 | A kind of modified poly-succinic fourth diester nano composite material and preparation method thereof |
| CN106876012A (en) * | 2017-02-23 | 2017-06-20 | 海安县天星电工材料有限公司 | High-temperature resistant enamelled wire |
| CN109616259A (en) * | 2018-12-10 | 2019-04-12 | 先登高科电气有限公司 | It is a kind of using water-based insulating paint as the manufacture craft of the enameled wire of insulating layer |
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| JP2009212034A (en) * | 2008-03-06 | 2009-09-17 | Hitachi Magnet Wire Corp | Varnish for partial discharge resistant enameled wire and partial discharge resistant enameled wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204257239U (en) * | 2014-12-30 | 2015-04-08 | 浙江洪波科技股份有限公司 | High-temperature resistant enamelled wire |
| CN106543652A (en) * | 2015-09-18 | 2017-03-29 | 上海东升新材料有限公司 | A kind of modified poly-succinic fourth diester nano composite material and preparation method thereof |
| CN106876012A (en) * | 2017-02-23 | 2017-06-20 | 海安县天星电工材料有限公司 | High-temperature resistant enamelled wire |
| CN109616259A (en) * | 2018-12-10 | 2019-04-12 | 先登高科电气有限公司 | It is a kind of using water-based insulating paint as the manufacture craft of the enameled wire of insulating layer |
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