CN114898930A - Insulation film of FIW completely insulated wire in salt-resistant and corrosion-resistant environment - Google Patents
Insulation film of FIW completely insulated wire in salt-resistant and corrosion-resistant environment Download PDFInfo
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- CN114898930A CN114898930A CN202210627528.6A CN202210627528A CN114898930A CN 114898930 A CN114898930 A CN 114898930A CN 202210627528 A CN202210627528 A CN 202210627528A CN 114898930 A CN114898930 A CN 114898930A
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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
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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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
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0225—Three or more layers
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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
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- 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
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Abstract
The invention discloses an insulation film of FIW completely insulated wire in a salt-tolerant and corrosion-resistant environment, which comprises a conductor, and a basic insulation layer, a voltage-resistant insulation layer, a shielding layer and a reinforced insulation layer which are sequentially coated outside the conductor from inside to outside, wherein the insulation film is coated between the basic insulation layer and the voltage-resistant insulation layer, the insulation film is uniformly coated on the voltage-resistant insulation layer as a protective layer in a nano spraying mode through an enamelling machine, and the protective layer is used as an insulation substrate for improving the salt tolerance of the insulated wire. The insulating film disclosed by the invention can effectively reduce the thickness of the material while ensuring the insulating property, has the characteristics of high strength, high wear resistance, stronger salt corrosion resistance, high toughness and the like, improves the comprehensive performance of the insulating wire, and meets the use requirement of the insulating wire in a salt environment (the concentration is less than 3.0%).
Description
Technical Field
The invention relates to the technical field of insulated wires, in particular to an FIW insulating film for completely insulating wires in a salt-tolerant and corrosion-resistant environment.
Background
The insulated wire is a wire coated with an insulating layer, different insulating materials are selected to obtain different characteristics, FIW wire is defined as a completely insulated enameled wire in the industry and belongs to the category of enameled wires, but FIW wire is defined as a product capable of replacing the traditional TIW (three-layer insulated wire) in terms of performance.
With the continuous enlargement of the scales of industries such as the Chinese power industry, the data communication industry, the urban rail transit industry, the automobile industry, the manufacturing and processing industry and the like, the demand for the insulated wire will also increase rapidly. Meanwhile, with the rapid development of modern electronic technology, the processing and transmission of digital circuits enter a high-frequency stage, and the requirements of the magneto-electric industry are higher and the power is higher and higher when 5G comes; the requirements for high-performance materials with high voltage resistance and high insulating strength are higher and higher, and the high voltage resistance layer of the high-performance materials is required to be thinner and thinner. Among them, the conductor is important in several properties such as dielectric property, heat resistance, dimensional stability, moisture resistance, etc., and for the "outer insulating layer: high insulating property, high voltage resistance (20 KV and higher), high temperature resistance (180 ℃), and various normal performances in a salt environment (with the concentration of less than 3.0 percent, such as in seawater) are very important and must be matched with the requirements of a conductor. The original material enameled wire (1500V) and the three-layer insulated wire (6000V) in the magnetoelectric industry can not meet the requirements of the original material enameled wire and the original material insulated wire, and the insulating layer is too thick, so that the volume of the product is increased. Particularly, in seawater with high salt content, the seawater contains a large amount of salt, so that the seawater has a strong corrosion effect and is easy to cause chemical corrosion, thereby affecting the performance of the insulated wire. Therefore, in order to improve the stability and corrosion resistance of the insulated wire under severe environment, an FIW insulating film for completely insulating the wire, which resists salt and corrosion, is designed.
Disclosure of Invention
The technical problem to be solved by the invention is to solve the problems in the background art, and to improve the stability and corrosion resistance of the insulated wire in a severe environment, effectively reduce the thickness of the material while ensuring the insulating property, improve the comprehensive performance of the insulated wire, and meet the use requirement of the insulated wire in a salt environment, thereby designing an insulating film with salt resistance and corrosion resistance, in particular to an insulating film of FIW complete insulated wire in the salt resistance and corrosion resistance environment.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an insulating film of FIW complete insulated wire under salt-tolerant anticorrosive environment, including the conductor and from interior to outer cladding in proper order in the outer basic insulation layer of conductor, withstand voltage insulating layer, shielding layer and the enhancement insulating layer the coating has the insulating film between basic insulation layer and the withstand voltage insulating layer, the insulating film passes through the enameling machine, adopts the even coating of nanometer spraying mode to be as the inoxidizing coating on the withstand voltage insulating layer, the inoxidizing coating is used for improving the salt-tolerant ability of insulated wire as insulating substrate.
Further, the FIW insulating film for completely insulating the wire in the salt-resistant and corrosion-resistant environment is characterized in that 6-60 insulating films are coated on the voltage-resistant insulating layer, and the thickness of each insulating film is 1.0-2.0 mu m.
Further, the FIW insulating film for completely insulating the wire in the salt-tolerant and corrosion-resistant environment comprises the following raw materials in parts by weight: 910-930 parts of polyurethane resin, 0.3-0.6 part of polyamide, 0.3-0.6 part of cresol, 25-35 parts of polyarylsulfone, 8-10 parts of polytetrafluoroethylene, 35-45 parts of salt-resistant agent and 2000-4000 parts of solvent.
Further, the FIW insulating film for completely insulating the wire in the salt-tolerant and corrosion-resistant environment comprises the following raw materials in parts by weight: 920 parts of polyurethane resin, 0.5 part of polyamide, 0.5 part of cresol, 30 parts of polyarylsulfone, 9 parts of polytetrafluoroethylene, 40 parts of salt resistance agent and 3000 parts of solvent, wherein the salt resistance agent is a polymer formed by diisodecyl phthalate, reactive nano SiO2 and calcium carbonate; the solvent is any one of dimethylformamide, dimethylacetamide, N-methylpyrrolidone or dimethyl sulfoxide.
Further, the invention relates to an FIW insulating film for completely insulating wires in a salt-resistant and corrosion-resistant environment, and the preparation method of the insulating film comprises the following steps:
(1) weighing the raw materials according to the weight ratio, adding a solvent into a reaction kettle, simultaneously adding polyurethane resin, polyamide, cresol and polyarylsulfone, and uniformly stirring and mixing to prepare a mixed solvent;
(2) adding the mixed solvent into a reaction kettle, uniformly stirring, heating, gradually adding polytetrafluoroethylene, stirring and heating after the addition is finished, and keeping the temperature until the polytetrafluoroethylene is completely dissolved to obtain a semi-finished product;
(3) adding the semi-finished product into a reaction kettle, uniformly stirring, heating, gradually adding a salt-resistant agent, stirring and heating after the addition is finished, keeping the temperature until the salt-resistant agent is completely dissolved, and cooling to obtain insulating film slurry;
(4) and adding the obtained insulating film slurry into an enameling machine, uniformly coating the insulating film slurry on a pressure-resistant insulating layer (30) in a nano spraying mode, controlling the coating thickness to be 1.0-2.0 mu m, coating at least 6 layers, and finally drying to obtain the insulating film.
The insulating film of FIW completely insulated wire in the salt-tolerant and corrosion-resistant environment is coated on the existing voltage-resistant insulating layer, the insulating film is prepared by mixing polyurethane resin, polyamide, cresol, polyarylsulfone, polytetrafluoroethylene, a salt-resistant agent and a solvent to form slurry, and a protective layer is coated by an enamelling machine in a nano spraying mode, so that the insulating film has strong corrosion resistance to salt water; meanwhile, the basic insulating layer, the voltage-resistant insulating layer, the shielding layer and the reinforcing insulating layer are sequentially coated outside the conductor, so that the high insulating performance, high voltage resistance (greater than or equal to 20KV) and high temperature resistance (180 ℃) of the insulated wire are greatly improved, various performances of the insulated wire are greatly improved in a salt environment (with the concentration of less than 3.0%), the thickness of the insulating layer is only about half of the original thickness, namely about 100 mu m, and particularly the high temperature resistance, the chemical corrosion resistance and the electric insulating property in the salt-resistant environment are enhanced. The insulating film disclosed by the invention can effectively reduce the thickness of the material while ensuring the insulating property, has the characteristics of high strength, high wear resistance, stronger salt corrosion resistance, high toughness and the like, improves the comprehensive performance of the insulating wire, and meets the use requirement of the insulating wire in a salt environment (the concentration is less than 3.0%).
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Shown in the figure: 10-conductor, 20-basic insulating layer, 30-voltage-resistant insulating layer, 40-shielding layer and 50-strong insulating layer.
Detailed Description
In order to more fully explain the practice of the invention, reference will now be made to the following examples which are intended to be illustrative thereof.
Example 1:
as shown in fig. 1, the insulation film of FIW fully insulated wire in a salt-tolerant and corrosion-resistant environment according to the present invention comprises a conductor 10, and a base insulation layer 20, a voltage-resistant insulation layer 30, a shielding layer 40, and a reinforcing insulation layer 50 which are sequentially coated outside the conductor 10 from inside to outside, wherein an insulation film is coated between the base insulation layer 20 and the voltage-resistant insulation layer 30, the insulation film is uniformly coated on the voltage-resistant insulation layer 30 as a protective layer by using a nano-spraying manner through an enameling machine, and the protective layer is used as an insulation substrate for improving the salt-tolerant performance of the insulated wire. According to practical requirements, 6 insulating films are coated on the voltage-resistant insulating layer 30, and the thickness of each insulating film is 1.5-2.0 μm.
The invention also discloses a preparation method of the insulating film, which comprises the following steps:
(1) weighing the raw materials according to the weight ratio, respectively taking 910 parts of polyurethane resin, 0.6 part of polyamide, 0.4 part of cresol, 34 parts of polyarylsulfone, 10 parts of polytetrafluoroethylene, 45 parts of salt tolerance agent and 2000 parts of solvent, wherein the salt tolerance agent is a polymer formed by diisodecyl phthalate, reactive nano SiO2 and calcium carbonate, the solvent is dimethylformamide, adding the solvent into a reaction kettle, simultaneously adding the polyurethane resin, the polyamide, the cresol and the polyarylsulfone, and uniformly stirring and mixing to prepare a mixed solvent;
(2) adding the mixed solvent into a reaction kettle, uniformly stirring, heating, gradually adding polytetrafluoroethylene, stirring and heating after the addition is finished, and keeping the temperature until the polytetrafluoroethylene is completely dissolved to obtain a semi-finished product;
(3) adding the semi-finished product into a reaction kettle, uniformly stirring, heating, gradually adding a salt-resistant agent, stirring and heating after the addition is finished, keeping the temperature until the salt-resistant agent is completely dissolved, and cooling to obtain insulating film slurry;
(4) and adding the obtained insulating film slurry into an enameling machine, uniformly coating the insulating film slurry on a voltage-resistant insulating layer (30) in a nano spraying mode, and finally drying to obtain the insulating film.
Example 2:
as shown in fig. 1, the insulation film of FIW fully insulated wire in a salt-tolerant and corrosion-resistant environment according to the present invention comprises a conductor 10, and a base insulation layer 20, a voltage-resistant insulation layer 30, a shielding layer 40, and a reinforcing insulation layer 50 sequentially coated outside the conductor 10 from inside to outside, wherein an insulation film is coated between the base insulation layer 20 and the voltage-resistant insulation layer 30, the insulation film is uniformly coated on the voltage-resistant insulation layer 30 as a protective layer by an enameling machine in a nano-spraying manner, and the protective layer is used as an insulation substrate for improving salt-tolerant performance of the insulated wire. According to practical requirements, 10 insulating films are coated on the voltage-resistant insulating layer 30, and the thickness of each insulating film is 1.2-1.6 microns.
The invention also discloses a preparation method of the insulating film, which comprises the following steps:
(1) weighing raw materials according to a weight ratio, respectively taking 920 parts of polyurethane resin, 0.5 part of polyamide, 0.5 part of cresol, 30 parts of polyarylsulfone, 9 parts of polytetrafluoroethylene, 40 parts of salt tolerance agent and 3000 parts of solvent, wherein the salt tolerance agent is a polymer formed by diisodecyl phthalate, reactive nano SiO2 and calcium carbonate, the solvent is dimethylacetamide, adding the solvent into a reaction kettle, simultaneously adding the polyurethane resin, the polyamide, the cresol and the polyarylsulfone, and stirring and mixing uniformly to prepare a mixed solvent;
(2) adding the mixed solvent into a reaction kettle, uniformly stirring, heating, gradually adding polytetrafluoroethylene, stirring and heating after the addition is finished, and keeping the temperature until the polytetrafluoroethylene is completely dissolved to obtain a semi-finished product;
(3) adding the semi-finished product into a reaction kettle, uniformly stirring, heating, gradually adding a salt-resistant agent, stirring and heating after the addition is finished, keeping the temperature until the salt-resistant agent is completely dissolved, and cooling to obtain insulating film slurry;
(4) and adding the obtained insulating film slurry into an enameling machine, uniformly coating the insulating film slurry on a voltage-resistant insulating layer (30) in a nano spraying mode, and finally drying to obtain the insulating film.
Example 3:
as shown in fig. 1, the insulation film of FIW fully insulated wire in a salt-tolerant and corrosion-resistant environment according to the present invention comprises a conductor 10, and a base insulation layer 20, a voltage-resistant insulation layer 30, a shielding layer 40, and a reinforcing insulation layer 50 sequentially coated outside the conductor 10 from inside to outside, wherein an insulation film is coated between the base insulation layer 20 and the voltage-resistant insulation layer 30, the insulation film is uniformly coated on the voltage-resistant insulation layer 30 as a protective layer by an enameling machine in a nano-spraying manner, and the protective layer is used as an insulation substrate for improving salt-tolerant performance of the insulated wire. According to practical requirements, 20 insulating films are coated on the voltage-resistant insulating layer 30, and the thickness of each insulating film is 1.0-1.5 μm.
The invention also discloses a preparation method of the insulating film, which comprises the following steps:
(1) weighing 930 parts of polyurethane resin, 0.4 part of polyamide, 0.6 part of cresol, 25 parts of polyarylsulfone, 8 parts of polytetrafluoroethylene, 36 parts of a salt-resistant agent and 4000 parts of a solvent, wherein the salt-resistant agent is a polymer formed by diisodecyl phthalate, reactive nano SiO2 and calcium carbonate; adding the solvent into a reaction kettle, simultaneously adding polyurethane resin, polyamide, cresol and polyarylsulfone, and uniformly stirring and mixing to prepare a mixed solvent;
(2) adding the mixed solvent into a reaction kettle, uniformly stirring, heating, gradually adding polytetrafluoroethylene, stirring and heating after the addition is finished, and keeping the temperature until the polytetrafluoroethylene is completely dissolved to obtain a semi-finished product;
(3) adding the semi-finished product into a reaction kettle, uniformly stirring, heating, gradually adding a salt-resistant agent, stirring and heating after the addition is finished, keeping the temperature until the salt-resistant agent is completely dissolved, and cooling to obtain insulating film slurry;
(4) and adding the obtained insulating film slurry into an enameling machine, uniformly coating the insulating film slurry on a voltage-resistant insulating layer (30) in a nano spraying mode, and finally drying to obtain the insulating film.
According to the related technical standard of JB/T7599-2013 enameled winding wire insulating paint, the insulating wires prepared in the first embodiment, the second embodiment and the third embodiment of the invention are tested, and through the test, all indexes of the insulating wires meet the related technical standard of JB/T7599-2013 enameled winding wire insulating paint.
In addition, the finished insulated wires prepared in the first, second and third examples were tested for seawater salt spray corrosion resistance, seawater moisture impregnation resistance and torsion resistance.
The finished insulated wire product has the requirements on seawater salt mist corrosion resistance: three finished cable samples with the length of 1.2m are placed in a solution with the salt content (NaCl) mass concentration of 20% and the temperature of 35 +/-1 ℃ for soaking for 45 days. The insulating wire is bent in a U shape when being soaked, and the two ends of the sample are respectively 35cm exposed out of the water surface; after the soaking is finished, the cable can pass the withstand voltage test of AC10kV/5 min; the cable is wound on a round shaft with the diameter of 9 times the outer diameter of a cable sample, and the condition that no visually visible cracks exist on the insulating surface and the insulation is not stripped from the insulated wire in the process is required. After the test was completed, no peeling occurred.
The finished insulated wire has the requirements on seawater moisture resistant impregnation performance: the insulated dielectric constant of the cable is not more than 6 after the cable is soaked in water with the temperature of 85 ℃ for 1 day, the AC capacitance increment between the end of the soaking day 4 and the end of the soaking day 1 is not more than 5, the AC capacitance increment between the end of the soaking day 14 and the end of the soaking day 7 is not more than 3, the stability factor after the cable is soaked for 14 days is not more than 1, and the insulated resistance constant after the cable is soaked for 96 days is not less than 3250M omega.Km. After the test, the resistance constants were all larger than 6450 M.OMEGA.Km. No peeling occurred.
The torsion resistance of the finished insulated wire product is required: and at the low temperature of minus 40 ℃, the finished insulated wire is twisted clockwise by 360 degrees, then is restored to a natural state, is twisted counterclockwise by the same angle, then is restored to the natural state again, is a period, 12000 periods of tests are carried out according to the stipulation, and the twisting speed is 720-1080 degrees/min. During the period, the heat cycle tests of 8-hour electrifying heating and 16-hour natural cooling are simultaneously carried out, and during the electrifying period, the conductor temperature is stabilized at the maximum working temperature of the cable, and 14 heat cycle tests are carried out in total. After the test is finished, the appearance of the insulated wire has no cracking phenomenon.
By adopting the insulating film, the insulating film is coated on the existing voltage-resistant insulating layer 30, and the insulating film is coated by an enamelling machine in a nano-spraying mode to form a protective layer, so that the insulating film has strong corrosion resistance to salt water, and the prepared insulating wire has high insulating performance, high voltage resistance (greater than or equal to 20KV) and high temperature resistance (180 ℃), various performances of the prepared insulating wire are greatly improved in a salt environment (the concentration is less than 3.0%), and the thickness of the insulating layer is only about half of the original thickness.
In conclusion, the insulating film disclosed by the invention can effectively reduce the thickness of the material while ensuring the insulating property, has the characteristics of high strength, high wear resistance, stronger salt corrosion resistance, high toughness and the like, improves the comprehensive performance of the insulating wire, and meets the use requirement of the insulating wire in a salt environment (with the concentration of less than 3.0%).
The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments, the above description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, and any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.
Claims (5)
1. An insulating film of FIW complete insulated wire under salt-tolerant anticorrosive environment, including the conductor and from interior to outer cladding in proper order in the outer basic insulation layer of conductor, withstand voltage insulating layer, shielding layer and enhancement insulating layer, its characterized in that: the insulating film coats between basic insulating layer and the withstand voltage insulating layer, the insulating film passes through the enameling machine, adopts the nanometer spraying mode even coating as the inoxidizing coating on the withstand voltage insulating layer, the inoxidizing coating is used for improving the salt tolerance of insulated wire as insulating substrate.
2. An FIW insulating film for fully insulating wires in a salt and corrosion resistant environment according to claim 1, wherein: 6-60 insulating films are coated on the voltage-resistant insulating layer, and the thickness of each insulating film is 1.0-2.0 mu m.
3. The insulating film of FIW completely insulating wires in the environment of salt and corrosion resistance according to claim 1, wherein the insulating film comprises the following raw materials in parts by weight: 910-930 parts of polyurethane resin, 0.3-0.6 part of polyamide, 0.3-0.6 part of cresol, 25-35 parts of polyarylsulfone, 8-10 parts of polytetrafluoroethylene, 35-45 parts of salt-resistant agent and 2000-4000 parts of solvent.
4. The insulating film of FIW completely insulating wires in a salt and corrosion resistant environment according to claim 3, wherein the insulating film comprises the following raw materials in parts by weight: 920 parts of polyurethane resin, 0.5 part of polyamide, 0.5 part of cresol, 30 parts of polyarylsulfone, 9 parts of polytetrafluoroethylene, 40 parts of salt resistance agent and 3000 parts of solvent, wherein the salt resistance agent is a polymer formed by diisodecyl phthalate, reactive nano SiO2 and calcium carbonate; the solvent is any one of dimethylformamide, dimethylacetamide, N-methylpyrrolidone or dimethyl sulfoxide.
5. The insulating film of FIW completely insulating wires in the environment of salt and corrosion resistance according to any one of claims 3 or 4, wherein the preparation method of the insulating film comprises the following steps:
(1) weighing the raw materials according to the weight ratio, adding a solvent into a reaction kettle, simultaneously adding polyurethane resin, polyamide, cresol and polyarylsulfone, and uniformly stirring and mixing to prepare a mixed solvent;
(2) adding the mixed solvent into a reaction kettle, uniformly stirring, heating, gradually adding polytetrafluoroethylene, stirring and heating after the addition is finished, and keeping the temperature until the polytetrafluoroethylene is completely dissolved to obtain a semi-finished product;
(3) adding the semi-finished product into a reaction kettle, uniformly stirring, heating, gradually adding a salt-resistant agent, stirring and heating after the addition is finished, keeping the temperature until the salt-resistant agent is completely dissolved, and cooling to obtain insulating film slurry;
(4) and adding the obtained insulating film slurry into an enameling machine, uniformly coating the insulating film slurry on a pressure-resistant insulating layer (30) in a nano spraying mode, controlling the coating thickness to be 1.0-2.0 mu m, coating at least 6 layers, and finally drying to obtain the insulating film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210627528.6A CN114898930A (en) | 2022-06-06 | 2022-06-06 | Insulation film of FIW completely insulated wire in salt-resistant and corrosion-resistant environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210627528.6A CN114898930A (en) | 2022-06-06 | 2022-06-06 | Insulation film of FIW completely insulated wire in salt-resistant and corrosion-resistant environment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111768922A (en) * | 2020-07-01 | 2020-10-13 | 广东电网有限责任公司 | Coating method of bus insulating layer, bus and power equipment |
| CN112143361A (en) * | 2020-10-10 | 2020-12-29 | 安顺市乾辰谷材科技有限公司 | Insulating paint for salt corrosion resistant FIW completely insulated wire |
| CN212624912U (en) * | 2020-04-29 | 2021-02-26 | 安顺市乾辰谷材科技有限公司 | Heat-resistant FIW completely-insulated wire |
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- 2022-06-06 CN CN202210627528.6A patent/CN114898930A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212624912U (en) * | 2020-04-29 | 2021-02-26 | 安顺市乾辰谷材科技有限公司 | Heat-resistant FIW completely-insulated wire |
| CN111768922A (en) * | 2020-07-01 | 2020-10-13 | 广东电网有限责任公司 | Coating method of bus insulating layer, bus and power equipment |
| CN112143361A (en) * | 2020-10-10 | 2020-12-29 | 安顺市乾辰谷材科技有限公司 | Insulating paint for salt corrosion resistant FIW completely insulated wire |
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