Preparation process of ultrathin paint film transposed conductor

Abstract

The invention relates to the technical field of transposed conductors, in particular to a preparation process of an ultrathin paint film transposed conductor, which comprises the following steps of: coating acetal paint on a base material, then coating intermediate modified paint, finally coating outer paint, and processing a treated copper wire into the transposed conductor. According to the ultrathin paint film transposed conductor, a copper wire is cleaned through absolute ethyl alcohol, then acetal paint, intermediate modified paint and outer paint are coated in a matched mode, finally, the transposed conductor is manufactured through the transposed conductor device and the wrapping device, the electrical performance, the heat conduction performance, the salt mist resistance and the high temperature resistance of the product are excellent, and the service life of the product is prolonged. Meanwhile, the impact resistance and the waterproof effect of the product are excellent, and the comprehensive coordination of the product is improved in a balanced manner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transposed conductor, and particularly relates to a preparation process of an ultra-thin paint film transposed conductor. BACKGROUND

[0002] In the manufacturing field of electrical equipment such as motors and transformers, the performance of the conductor directly affects the overall quality of the equipment. The widely used conductor paint film often faces a dilemma: if a thicker paint film is pursued to ensure certain performance, it will lead to an increase in the size of the equipment; if the size is attempted to be reduced and the paint film is thinned, the performance of the paint film will be affected.

[0003] In order to thin the paint film, the traditional conductor paint film reduces the electrical performance to a certain extent, which affects the electric shock protection capability of the conductor, and also affects the salt mist resistance, high temperature resistance, and the comprehensive coordination of the product, and the impact resistance and waterproofness of the product are poor, which further limits the use efficiency of the product. SUMMARY

[0004] In view of the defects of the prior art, the purpose of the present application is to provide a preparation process of an ultra-thin paint film transposed conductor to solve the problems raised in the background art.

[0005] The technical problem solved by the present application adopts the following technical scheme: The present application provides a preparation process of an ultra-thin paint film transposed conductor, comprising the following steps: Step one: copper wire is used as a base material, and is cleaned with anhydrous ethanol for 12-15 min under ultrasonic waves at an ultrasonic power of 350-400 W, and after the ultrasonic cleaning is completed, the base material is dried at 145-155 DEG C until the surface moisture content is less than 0.1%; Step two: the base material treated in step one is coated with acetal paint with a coating thickness of 0.01-0.02 mm, then is coated with intermediate modified paint with a coating thickness of 0.03-0.04 mm, and finally is coated with outer paint with a coating thickness of 0.02-0.03 mm; Step three: the copper wire treated in step two is processed into a transposed conductor, and an ultra-thin paint film transposed conductor is obtained.

[0006] Preferably, drying treatment is adopted in the coating, and the drying temperature is 180-500 DEG C, and the drying time is 20-30 min; The specific operation method for processing the copper wire into a transposed conductor is as follows: 5-87 copper wires in step two are arranged into a transposed conductor bundle through a transposed conductor device, and an insulating net is wrapped around the transposed conductor bundle through a wrapping device to form an insulating net layer, the thickness of the insulating net layer is 0.23-0.28 mm, and the wrapping tension of the insulating net is controlled at 15-23 N.

[0007] Preferably, the intermediate modified paint comprises the following raw materials by weight: Epoxy resin E51 30-35 parts, nano-cellulose-zirconium silicate combined modified extender 8-12 parts, doped nano-aluminum nitride complexing agent 7-11 parts, curing agent 4-7 parts, curing accelerator 3-5 parts, ethanol solvent 20-25 parts and silane coupling agent KH560 4-7 parts.

[0008] Preferably, the curing agent is p-xylene aniline; the curing accelerator is 2-methyl imidazole.

[0009] Preferably, the preparation method of the nano-cellulose-zirconium silicate combined modified extender is: S01: First, prepare a sodium alginate solution with a mass fraction of 10-15%, and a sodium silicate solution with a mass fraction of 4-7%; The following is measured by weight, 5-8 parts of nano-cellulose, 2-5 parts of lanthanum oxide, and 8-12 parts of sodium alginate solution and 1-3 parts of sodium silicate solution are uniformly blended and stirred to obtain a nano-cellulose-based blending liquid; S02: Preparation of zirconium silicate combined modifier: S02a: Blend 3-5 parts of zirconium silicate, 2-4 parts of diamond powder, and 1-3 parts of aluminum oxide, sinter for 1-1.5 h, sintering temperature is 300-350℃, sintering for 1-2 h, after sintering, zirconium silicate combined material is obtained; S02b: Blend 2-4 parts of sodium carboxymethyl cellulose, 1-2 parts of nano-silica sol, and 5-8 parts of dopamine hydrochloride solution and 2-3 parts of citric acid to obtain a modified liquid; Blend 5-8 parts of zirconium silicate combined material and 8-11 parts of modified liquid thoroughly, then filter and dry to obtain a zirconium silicate combined modifier; S03: Ball mill the nano-cellulose-based blending liquid and the zirconium silicate combined modifier according to a weight ratio of (11-15):7, after ball milling, filter and dry to obtain a nano-cellulose-zirconium silicate combined modified extender.

[0010] Preferably, the mass fraction of the dopamine hydrochloride solution is 7-11%; the ball milling speed in S03 is 1200-1500 r / min, and the ball milling time is 2-3 h.

[0011] The nanocellulose-zirconium silicate combined modifier is improved by mutual ball milling of a nanocellulose-based blending liquid and a zirconium silicate combined modifier, the nanocellulose-based blending liquid is prepared by blending nanocellulose with lanthanum oxide and sodium alginate solution and sodium silicate solution, the nanocellulose is blended with the sodium alginate solution and the sodium silicate solution to form a network structure with excellent toughness, the long-chain structure of the nanocellulose can disperse stress, and the hydroxyl groups of the sodium alginate form hydrogen bonds with the nanocellulose to endow the system with good ductility, thereby solving the problem that traditional rigid fillers easily cause the brittleness of paint film; The zirconium silicate combined modifier is improved by blending and optimizing a zirconium silicate combined material with a modification liquid, the zirconium silicate itself has excellent dielectric properties, is blended with aluminum oxide which has good insulation, and is further blended with diamond powder, and the three are used as a matrix, so that the insulation of the product is optimized, and the comprehensive performance of the product such as high temperature resistance and salt mist resistance is improved, and the blending of the raw materials in the modification liquid further enhances the performance of the product system.

[0012] Preferably, the preparation method of the doping nanometer aluminum nitride comprehensive modifier is as follows: S11: nanometer aluminum nitride is stirred in a sufficient amount of 10-15% potassium permanganate solution, then washed with boiling water for 3-5 times to obtain pretreated nanometer aluminum nitride; S10: β-cyclodextrin, silane coupling agent KH550 and ethanol aqueous solution are fully blended according to the weight ratio (3-5):2: (5-8) to obtain a β-cyclodextrin solution; S12: 3-5 parts of graphene, 2-4 parts of titanium dioxide and 5-8 parts of the β-cyclodextrin solution are fully blended according to the weight parts to obtain a graphene solution; 4-7 parts of the pretreated nanometer aluminum nitride and 5-8 parts of the graphene solution are subjected to ultrasonic treatment, and after the ultrasonic treatment, a nanometer aluminum nitride-graphene hybrid solution is obtained; S13: the nanometer aluminum nitride-graphene hybrid solution and the basalt fiber agent are mixed according to the weight ratio (7-11):5, ball milled at a rotation speed of 1000-1500 r / min for 2-3 h, and then subjected to suction filtration and drying to obtain the doping nanometer aluminum nitride comprehensive modifier.

[0013] Nanometer aluminum nitride has excellent thermal conductivity, and is improved by activation with a potassium permanganate solution and optimized by ultrasonic treatment with a graphene solution, the graphene, titanium dioxide and β-cyclodextrin in the graphene solution are improved by mutual blending, the graphene and titanium dioxide are blended with the nanometer aluminum nitride to further enhance the performance of the system; The β-cyclodextrin, the silane coupling agent KH550 and the ethanol aqueous solution are cooperated and optimized, the β-cyclodextrin has amphiphilicity, and the amino group (-NH2) at one end of the silane coupling agent KH550 can be combined with the β-cyclodextrin, and the siloxane group at the other end can react with the hydroxyl group on the surface of the inorganic components such as nano-aluminum nitride, graphene and titanium dioxide to form a chemical bond connection, effectively improving the interfacial compatibility of the inorganic filler and the organic matrix.

[0014] Preferably, the mass fraction of the ethanol aqueous solution is 75-85%; the ultrasonic power of the ultrasonic treatment is 450-500W, and the ultrasonic treatment is performed for 1-2h.

[0015] Preferably, the preparation method of the basalt fiber agent is as follows: The basalt fiber is preheated at 55-60℃ for 1-2h to obtain preheated basalt fiber, and the preheated basalt fiber is immersed in a treatment liquid with a weight of 5-8 times of the total weight of the preheated basalt fiber for immersion treatment, the immersion ultrasonic power is 350-400W, the immersion time is 1-2h, after the immersion is completed, the basalt fiber agent is obtained by filtration and drying. The treatment liquid comprises the following raw materials in parts by weight: 3-5 parts of mica powder, 2-5 parts of quartz powder, 2-3 parts of halloysite nanotubes, and 5-8 parts of a 10-15% sodium dodecyl sulfate solution.

[0016] The mica powder and the quartz powder have excellent mechanical stability, and can form a "reinforcing skeleton" on the surface of the fiber to directly improve the tensile strength, wear resistance and impact resistance of the basalt fiber; the halloysite nanotubes can fill the small pores on the surface of the fiber to further optimize the structural density of the fiber and reduce stress concentration when the fiber is stressed; meanwhile, the mica powder and the quartz powder are chemically inert minerals, and the coating layers thereof can form a "barrier" on the surface of the basalt fiber to reduce the sensitivity of the fiber to corrosive media such as water, acid and alkali, thereby prolonging the service life of the fiber in a complex environment, so that the basalt fiber agent further enhances the performance of the product in the system.

[0017] Preferably, the preparation method of the outer paint is as follows: 120-130 parts by weight of dimethylbenzene is added to a reaction kettle, heated to 45-50℃, then 100-120 parts by weight of an epoxy resin with a number average molecular weight of 5000-8000 and a softening point of 145-150℃ is added, stirred and kept warm, then cooled to room temperature, 45-50 parts by weight of 3-methyltetrahydrophthalic anhydride, 2-3 parts by weight of epoxy soybean oil and 0.5-0.7 parts by weight of polyacrylate with a number average molecular weight of 5000-6000 are added, and stirred and reacted for 2h, the stirring speed is 150-170r / min, and the stirring is completed to obtain the outer paint. The outer paint is prepared by the existing technical method, the process is simple, and the performance of the product is further enhanced.

[0018] Compared with the prior art, the present application has the following advantages: The super-thin paint film transposed conductor of the present application adopts copper wire cleaned by anhydrous ethanol, and then is coated with acetal paint, intermediate modified paint and outer paint, and finally is made into a transposed conductor through a transposed conductor device and a wrapping device. The product has excellent electrical performance, heat conduction performance, salt mist resistance and high temperature resistance, and has excellent impact resistance and waterproof effect. The comprehensive coordination of the product is balanced and improved. Through the synergistic effect of three-layer super-thin functional paint film design and core modifier, the comprehensive performance is guaranteed and even improved while the paint film is thinned to the extreme: the bottom acetal paint realizes close adhesion with the copper substrate, the middle modified paint bears the core functions of electrical insulation, heat conduction and mechanical protection, and the outer paint strengthens the weather resistance. Through the coordination and optimization between layers, the performance of the super-thin paint film transposed conductor product is comprehensively improved. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] The preparation process of the super-thin paint film transposed conductor of the present embodiment includes the following steps: Step one: take copper wire as the substrate, and clean it by anhydrous ethanol ultrasonic cleaning for 12-15 min at an ultrasonic power of 350-400 W. After ultrasonic cleaning, dry the copper wire at 145-155℃ until the surface moisture content is less than 0.1%; Step two: coat the substrate treated in step one with acetal paint, with a coating thickness of 0.01-0.02 mm, then coat it with intermediate modified paint, with a coating thickness of 0.03-0.04 mm, and finally coat it with outer paint, with a coating thickness of 0.02-0.03 mm; Step three: process the copper wire treated in step two into a transposed conductor, and a super-thin paint film transposed conductor is obtained.

[0021] In the present embodiment, drying treatment is used for coating, and the drying temperature is 180-500℃, and the drying time is 20-30 min; The specific operation method for processing the copper wire into a transposed conductor is as follows: 5-87 copper wires in step two are prepared into a transposed conductor bundle through a transposed conductor device, and an insulating net layer is formed by wrapping the insulating net outside the transposed conductor bundle using a wrapping device. The thickness of the insulating net layer is 0.23-0.28 mm, and the wrapping tension of the insulating net is controlled at 15-23 N.

[0022] The intermediate modified paint of the embodiment comprises the following raw materials in parts by weight: Epoxy resin E51 30-35 parts, nanocellulose-zirconium silicate combined modified extender 8-12 parts, doping nanometer aluminum nitride comprehensive modifier 7-11 parts, curing agent 4-7 parts, curing accelerator 3-5 parts, ethanol solvent 20-25 parts, and silane coupling agent KH560 4-7 parts.

[0023] The curing agent of the embodiment is p-xylene diamine; and the curing accelerator is 2-methyl imidazole.

[0024] The preparation method of the nanocellulose-zirconium silicate combined modified extender of the embodiment is as follows: S01: First, prepare a sodium alginate solution with a mass fraction of 10-15% and a sodium silicate solution with a mass fraction of 4-7%; The following is measured by parts by weight. 5-8 parts of nanocellulose, 2-5 parts of lanthanum oxide, and 8-12 parts of sodium alginate solution and 1-3 parts of sodium silicate solution are uniformly blended and stirred to obtain a nanocellulose-based blending liquid; S02: Preparation of a modifier combined with zirconium silicate: S02a: Blend 3-5 parts of zirconium silicate, 2-4 parts of diamond powder, and 1-3 parts of aluminum oxide, sinter for 1-1.5 h, sinter at a temperature of 300-350°C for 1-2 h, and after sintering, obtain a zirconium silicate combination; S02b: Blend 2-4 parts of sodium carboxymethyl cellulose, 1-2 parts of nano-silica sol, and 5-8 parts of dopamine hydrochloride solution and 2-3 parts of citric acid to obtain a modified liquid; Blend 5-8 parts of the zirconium silicate combination and 8-11 parts of the modified liquid, then filter and dry to obtain a modifier combined with zirconium silicate; S03: Ball mill the nanocellulose-based blending liquid and the modifier combined with zirconium silicate at a weight ratio of (11-15):7, filter and dry after ball milling to obtain a nanocellulose-zirconium silicate combined modified extender.

[0025] The mass fraction of the dopamine hydrochloride solution of the embodiment is 7-11%; and the ball milling speed for the ball milling treatment in S03 is 1200-1500 r / min, and the ball milling time is 2-3 h.

[0026] The preparation method of the doping nanometer aluminum nitride comprehensive modifier of the embodiment is as follows: S11: Stir the nanometer aluminum nitride in a sufficient amount of potassium permanganate solution with a mass fraction of 10-15% until fully mixed, then wash with boiling water for 3-5 times to obtain pretreated nanometer aluminum nitride; Blending β-cyclodextrin, silane coupling agent KH550 and ethanol aqueous solution according to weight ratio (3-5):2:(5-8) sufficiently to obtain β-cyclodextrin solution; S12: according to weight parts, 3-5 parts of graphene, 2-4 parts of titanium dioxide and 5-8 parts of β-cyclodextrin solution are blended sufficiently to obtain graphene solution; 4-7 parts of pretreated nano-aluminum nitride and 5-8 parts of graphene solution are subjected to ultrasonic treatment, and after the ultrasonic treatment is completed, nano-aluminum nitride-graphene hybrid solution is obtained; S13: the nano-aluminum nitride-graphene hybrid solution and the basalt fiber agent are mixed according to weight ratio (7-11):5, ball milling treatment is performed, the ball milling speed is 1000-1500 r / min, the ball milling time is 2-3 h, after the ball milling is completed, suction filtration and drying are performed to obtain the basalt fiber agent doped with nano-aluminum nitride.

[0027] The mass fraction of the ethanol aqueous solution in this embodiment is 75-85%; the ultrasonic power of the ultrasonic treatment is 450-500 W, and the ultrasonic treatment time is 1-2 h.

[0028] The preparation method of the basalt fiber agent in this embodiment is as follows: The basalt fiber is first preheated at 55-60℃ for 1-2 h to obtain preheated basalt fiber, and the preheated basalt fiber is immersed in a treatment liquid which is 5-8 times the weight of the preheated basalt fiber to perform immersion treatment; the immersion ultrasonic power is 350-400 W, and the immersion time is 1-2 h; after the immersion is completed, suction filtration and drying are performed to obtain the basalt fiber agent; The treatment liquid comprises the following raw materials in parts by weight: 3-5 parts of mica powder, 2-5 parts of quartz powder, 2-3 parts of halloysite nanotubes, and 5-8 parts of a 10-15% mass fraction sodium dodecyl sulfate solution.

[0029] The preparation method of the outer paint in this embodiment is as follows: 120-130 parts by weight of dimethylbenzene are added to a reaction kettle, heated to 45-50℃, then 100-120 parts by weight of an epoxy resin with a number average molecular weight of 5000-8000 and a softening point of 145-150℃ are added, and stirring is performed under heat preservation, then the temperature is lowered to room temperature, 45-50 parts by weight of 3-methyltetrahydrophthalic anhydride, 2-3 parts by weight of epoxy soybean oil, and 0.5-0.7 parts by weight of a polyacrylate with a number average molecular weight of 5000-6000 are added, stirring reaction treatment is performed for 2 h, the stirring speed is 150-170 r / min, and after the stirring is completed, the outer paint is obtained.

[0030] Embodiment 1. The preparation process of the ultra-thin paint film transposed conductor in this embodiment includes the following steps: Step one: copper wire is used as the base material, anhydrous ethanol is used for ultrasonic cleaning for 12 min, the ultrasonic power is 350 W, and after the ultrasonic treatment is completed, the copper wire is dried at 145℃ until the surface water content is less than 0.1%. Step two: the substrate treated in step one is coated with an acetal paint with a coating thickness of 0.01 mm, then coated with an intermediate modified paint with a coating thickness of 0.03 mm, and finally coated with an outer paint with a coating thickness of 0.02 mm; Step three: the copper wire treated in step two is processed into a transposed conductor, thereby obtaining a transposed conductor with an ultra-thin paint film.

[0031] In this embodiment, drying treatment is used in each coating, and the drying temperature is 180°C, and the drying time is 20 min. The specific operation method for processing the copper wire into a transposed conductor is as follows: Five copper wires in step two are arranged into a transposed conductor bundle through a transposed conductor device, and an insulating net is wrapped around the transposed conductor bundle to form an insulating net layer through a wrapping device, and the thickness of the insulating net layer is 0.23 mm, and the wrapping tension of the insulating net is controlled at 15 N.

[0032] The intermediate modified paint in this embodiment comprises the following raw materials in parts by weight: Epoxy resin E51 30 parts, nanocellulose-zirconium silicate combined modified additive 8 parts, nanometer aluminum nitride doped comprehensive modifier 7 parts, curing agent 4 parts, curing accelerator 3 parts, ethanol solvent 20 parts, and silane coupling agent KH560 4 parts.

[0033] The curing agent in this embodiment is p-xylene aniline, and the curing accelerator is 2-methyl imidazole.

[0034] The preparation method of the nanocellulose-zirconium silicate combined modified additive in this embodiment is as follows: S01: first prepare a 10% sodium alginate solution by mass fraction and a 4% sodium silicate solution by mass fraction; The following are measured by weight parts, 5 parts of nanocellulose, 2 parts of lanthanum oxide, and 8 parts of sodium alginate solution and 1 part of sodium silicate solution are uniformly blended and stirred to obtain a nanocellulose-based blending liquid; S02: preparation of a zirconium silicate combined modifier: S02a: 3 parts of zirconium silicate, 2 parts of diamond powder, and 1 part of aluminum oxide are blended and sintered for 1 h at a sintering temperature of 300°C, and sintering is performed for 1 h, and after sintering, a zirconium silicate combined material is obtained; S02b: 2 parts of sodium carboxymethyl cellulose, 1 part of nano-silica sol, and 5 parts of dopamine hydrochloride solution and 2 parts of citric acid are fully blended to obtain a modified liquid; 5 parts of the zirconium silicate combined material and 8 parts of the modified liquid are fully blended, then filtered and dried to obtain a zirconium silicate combined modifier; S03: The nano-cellulose-based blending liquid and the zirconium silicate combined modifier are ball milled according to a weight ratio of 11:7, and after the ball milling, filtration and drying are performed to obtain the nano-cellulose-zirconium silicate combined additive.

[0035] The mass fraction of the dopamine hydrochloride solution in this embodiment is 7%; the ball milling speed in S03 is 1200 r / min, and the ball milling time is 2h.

[0036] The preparation method of the doping nano-aluminum nitride comprehensive regulator in this embodiment is as follows: S11: The nano-aluminum nitride is stirred in a sufficient amount of 10% mass fraction potassium permanganate solution, and then boiled in water for 3 times to obtain the pretreated nano-aluminum nitride; The beta-cyclodextrin, silane coupling agent KH550 and ethanol aqueous solution are blended according to a weight ratio of 3:2:5 to obtain a beta-cyclodextrin solution; S12: According to the weight part measurement, 3 parts of graphene, 2 parts of titanium dioxide and 5 parts of the beta-cyclodextrin solution are blended to obtain a graphene solution; 4 parts of the pretreated nano-aluminum nitride and 5 parts of the graphene solution are ultrasonically treated, and after the ultrasonic treatment, a nano-aluminum nitride-graphene hybrid solution is obtained; S13: The nano-aluminum nitride-graphene hybrid solution and the basalt fiber agent are uniformly mixed and ball milled according to a weight ratio of 7:5, the ball milling speed is 1000 r / min, the ball milling time is 2h, and after the ball milling, filtration and drying are performed to obtain the doping nano-aluminum nitride comprehensive regulator.

[0037] The mass fraction of the ethanol aqueous solution in this embodiment is 75%; the ultrasonic power in the ultrasonic treatment is 450W, and the ultrasonic time is 1h.

[0038] The preparation method of the basalt fiber agent in this embodiment is as follows: The basalt fiber is first preheated at 55℃ for 1h to obtain the preheated basalt fiber, and the preheated basalt fiber is immersed in a treatment liquid with a weight of 5 times the total weight of the preheated basalt fiber; the immersion ultrasonic power is 350W, and the immersion time is 1h; after the immersion, filtration and drying are performed to obtain the basalt fiber agent. The treatment liquid includes the following raw materials in parts by weight: 3 parts of mica powder, 2 parts of quartz powder and 2 parts of halloysite nanotubes, and 5 parts of 10% mass fraction sodium dodecyl sulfate solution.

[0039] The preparation method of the external paint in this embodiment is as follows: 120 parts by weight of xylene was added into a reaction kettle, heated to 45℃, then 100 parts by weight of epoxy resin with a number average molecular weight of 5000 and a softening point of 145℃ was added, and stirred at room temperature, then 45 parts by weight of 3-methyltetrahydrophthalic anhydride, 2 parts by weight of epoxy soybean oil and 0.5 parts by weight of polyacrylate with a number average molecular weight of 5000 were added and stirred for 2 hours at a stirring speed of 150 r / min, and the outer paint was obtained after the stirring was completed.

[0040] Example 2. The preparation process of the super-thin paint film transposed conductor of the embodiment comprises the following steps: Step one: the copper wire was used as the base material, and was ultrasonically cleaned with anhydrous ethanol for 15 minutes at an ultrasonic power of 400 W, and was dried at 155℃ until the surface water content was less than 0.1%; Step two: the base material treated in step one was coated with acetal paint with a coating thickness of 0.02 mm, then was coated with intermediate modified paint with a coating thickness of 0.04 mm, and finally was coated with outer paint with a coating thickness of 0.03 mm; Step three: the copper wire treated in step two was processed into a transposed conductor, and a super-thin paint film transposed conductor was obtained.

[0041] In the embodiment, drying treatment was used for coating, the drying temperature was 500℃, and the drying time was 30 minutes; The specific operation method for processing the copper wire into a transposed conductor was as follows: 87 copper wires in step two were arranged into a transposed conductor bundle through a transposed conductor device, and an insulating net layer was formed by wrapping the insulating net around the transposed conductor bundle using a wrapping device, the thickness of the insulating net layer was 0.28 mm, and the wrapping tension of the insulating net was controlled at 23 N.

[0042] The intermediate modified paint of the embodiment comprises the following raw materials by weight: epoxy resin E51 35 parts, nano-cellulose-zirconium silicate combined modified extender 12 parts, nano-aluminum nitride doped comprehensive modifier 11 parts, curing agent 7 parts, curing accelerator 5 parts, ethanol solvent 25 parts and silane coupling agent KH560 7 parts.

[0043] The curing agent of the embodiment is p-xylene aniline, and the curing accelerator is 2-methyl imidazole.

[0044] The preparation method of the nano-cellulose-zirconium silicate combined modified extender of the embodiment is as follows: S01: first prepare a sodium alginate solution with a mass fraction of 15% and a sodium silicate solution with a mass fraction of 7%; The following is measured by weight parts, 8 parts of nanocellulose, 5 parts of lanthanum oxide and 12 parts of sodium alginate solution and 3 parts of sodium silicate solution are uniformly blended and stirred to obtain a nanocellulose-based blending liquid; S02: Preparation of a zirconium silicate combined modifier: S02a: 5 parts of zirconium silicate, 4 parts of diamond powder and 3 parts of aluminum oxide are blended and sintered for 1.5 h, the sintering temperature is 350℃, and the sintering time is 2 h. After sintering, a zirconium silicate combined material is obtained; S02b: 4 parts of sodium carboxymethyl cellulose, 2 parts of nanosilica sol and 8 parts of dopamine hydrochloride solution and 3 parts of citric acid are fully blended to obtain a modification liquid; 8 parts of zirconium silicate combined material and 11 parts of modification liquid are fully blended, then filtered and dried to obtain a zirconium silicate combined modifier; S03: The nanocellulose-based blending liquid and the zirconium silicate combined modifier are ball milled at a weight ratio of 15:7. After ball milling, the mixture is filtered and dried to obtain a nanocellulose-zirconium silicate combined additive.

[0045] The mass fraction of dopamine hydrochloride solution in this embodiment is 11%; the ball milling speed in S03 is 1500 r / min, and the ball milling time is 3 h.

[0046] The preparation method of the nanometer aluminum nitride doped comprehensive regulator in this embodiment is as follows: S11: Nanometer aluminum nitride is fully stirred in a sufficient amount of 15% potassium permanganate solution, and then boiled in water for 5 times to obtain pretreated nanometer aluminum nitride; The beta-cyclodextrin, silane coupling agent KH550 and ethanol aqueous solution are fully blended at a weight ratio of 5:2:8 to obtain a beta-cyclodextrin solution; S12: 5 parts of graphene, 4 parts of titanium dioxide and 8 parts of beta-cyclodextrin solution are fully blended to obtain a graphene solution; 7 parts of pretreated nanometer aluminum nitride and 8 parts of graphene solution are subjected to ultrasonic treatment, and after ultrasonic treatment, a nanometer aluminum nitride-graphene hybrid solution is obtained; S13: The nanometer aluminum nitride-graphene hybrid solution and the basalt fiber agent are uniformly mixed and subjected to ball milling treatment at a weight ratio of 11:5, the ball milling speed is 1500 r / min, the ball milling time is 3 h, and after ball milling, the mixture is filtered and dried to obtain a nanometer aluminum nitride doped comprehensive regulator.

[0047] The mass fraction of ethanol aqueous solution in this embodiment is 85%; the ultrasonic power for ultrasonic treatment is 500 W, and the ultrasonic time is 2 h.

[0048] The preparation method of the basalt fiber agent in this embodiment is as follows: The basalt fiber is preheated at 60℃ for 2h to obtain preheated basalt fiber, the preheated basalt fiber is immersed in a treatment solution with a weight of 8 times of the total weight of the preheated basalt fiber, the immersion ultrasonic power is 400W, the immersion time is 2h, after the immersion, the basalt fiber agent is obtained by filtration and drying. The treatment solution comprises the following raw materials by weight: 5 parts of mica powder, 5 parts of quartz powder, 3 parts of halloysite nanotubes, and 8 parts of a 15% mass fraction sodium dodecyl sulfate solution.

[0049] The preparation method of the outer paint of the embodiment is as follows: 130 parts by weight of dimethylbenzene is added into a reaction kettle, heated to 50℃, then 120 parts by weight of epoxy resin with a number average molecular weight of 8000 and a softening point of 150℃ is added, heated and stirred, cooled to room temperature, then 50 parts by weight of 3-methyltetrahydrophthalic anhydride, 3 parts by weight of epoxy soybean oil and 0.7 parts by weight of polyacrylate with a number average molecular weight of 6000 are added and stirred for 2h, the stirring speed is 170r / min, and the outer paint is obtained after stirring.

[0050] Example 3. The preparation process of the super-thin paint film transposed conductor of the embodiment comprises the following steps: Step one: the copper wire is used as the base material, ultrasonic cleaning is performed with anhydrous ethanol for 13.5min, the ultrasonic power is 375W, and the base material is dried at 150℃ until the surface water content is less than 0.1%; Step two: the base material treated in step one is coated with acetal paint with a coating thickness of 0.015mm, then coated with intermediate modified paint with a coating thickness of 0.035mm, and finally coated with outer paint with a coating thickness of 0.025mm; Step three: the copper wire treated in step two is processed into a transposed conductor, and a super-thin paint film transposed conductor is obtained.

[0051] In the embodiment, drying treatment is used for coating, the drying temperature is 420℃, and the drying time is 25min; The specific operation method for processing the copper wire into a transposed conductor is as follows: 43 copper wires in step two are arranged into a transposed conductor bundle through a transposed conductor device, and an insulating net layer is formed by winding the insulating net around the transposed conductor bundle through a winding device, the thickness of the insulating net layer is 0.25mm, and the winding tension of the insulating net is controlled at 20N.

[0052] The intermediate modified paint of the embodiment comprises the following raw materials by weight: Epoxy resin E51 32.5 parts, nanocellulose-zirconium silicate combined modified extender 10 parts, doping nanometer aluminum nitride comprehensive regulator 9 parts, curing agent 5.5 parts, curing accelerator 4 parts, ethanol solvent 22.5 parts and silane coupling agent KH560 5.5 parts.

[0053] The curing agent of the embodiment is p-xylene diamine; and the curing accelerator is 2-methyl imidazole.

[0054] The preparation method of the nanocellulose-zirconium silicate combined modified extender of the embodiment is as follows: S01: First, prepare a 12.5% by mass sodium alginate solution and a 5.5% by mass sodium silicate solution; The following is measured by weight parts, 6.5 parts of nanocellulose, 3.5 parts of lanthanum oxide, 10 parts of sodium alginate solution and 2 parts of sodium silicate solution are uniformly blended and stirred to obtain a nanocellulose-based blending liquid; S02: Preparation of the zirconium silicate combined modifier: S02a: 4 parts of zirconium silicate, 3 parts of diamond powder and 2 parts of aluminum oxide are blended and sintered for 1.25 h at a sintering temperature of 325℃, and sintered for 1.5 h. After sintering, a zirconium silicate combined material is obtained; S02b: 3 parts of sodium carboxymethyl cellulose, 1.5 parts of nanometer silicon sol and 6.5 parts of dopamine hydrochloride solution and 2.5 parts of citric acid are fully blended to obtain a modified liquid; 6.5 parts of the zirconium silicate combined material and 9 parts of the modified liquid are fully blended, then filtered and dried to obtain a zirconium silicate combined modifier; S03: The nanocellulose-based blending liquid and the zirconium silicate combined modifier are ball milled at a weight ratio of 13:7. After ball milling, the mixture is filtered and dried to obtain a nanocellulose-zirconium silicate combined modified extender.

[0055] The mass fraction of the dopamine hydrochloride solution of the embodiment is 9%; and the ball milling speed in S03 is 1350 r / min, and the ball milling time is 2.5 h.

[0056] The preparation method of the doping nanometer aluminum nitride comprehensive regulator of the embodiment is as follows: S11: Nanometer aluminum nitride is fully stirred in a sufficient amount of 12.5% by mass potassium permanganate solution, and then washed with boiling water for 4 times to obtain pretreated nanometer aluminum nitride; The β-cyclodextrin, the silane coupling agent KH550 and the ethanol aqueous solution are fully blended at a weight ratio of 4:2: (5-8) to obtain a β-cyclodextrin liquid. S12: 4 parts of graphene, 3 parts of titanium dioxide and 6.5 parts of β-cyclodextrin were blended according to the weight parts to obtain a graphene liquid; 5.5 parts of pretreated nano-aluminum nitride and 6.5 parts of graphene liquid were subjected to ultrasonic treatment, and after the ultrasonic treatment was completed, a nano-aluminum nitride-graphene hybrid liquid was obtained; S13: The nano-aluminum nitride-graphene hybrid liquid and the basalt fiber agent were mixed according to a weight ratio of 9:5, ball milled, the ball milling speed was 1250 r / min, the ball milling time was 2.5 h, after the ball milling was completed, suction filtration and drying were performed to obtain a basalt fiber agent doped with nano-aluminum nitride.

[0057] The mass fraction of the ethanol aqueous solution in this embodiment was 80%; the ultrasonic power for the ultrasonic treatment was 475 W, and the ultrasonic treatment time was 1.5 h.

[0058] The preparation method of the basalt fiber agent in this embodiment was as follows: The basalt fiber was first preheated at 58℃ for 1.5 h to obtain preheated basalt fiber, and the preheated basalt fiber was immersed in a treatment liquid in an amount of 6.5 times the weight of the preheated basalt fiber for treatment, the immersion ultrasonic power was 375 W, the immersion time was 1.5 h, after the immersion was completed, suction filtration and drying were performed to obtain a basalt fiber agent; The treatment liquid included the following raw materials in parts by weight: 4 parts of mica powder, 3.5 parts of quartz powder, 2.5 parts of halloysite nanotubes, and 6.5 parts of a 12.5% mass fraction sodium dodecyl sulfate solution.

[0059] The preparation method of the outer paint in this embodiment was as follows: 125 parts by weight of dimethylbenzene were added to a reaction kettle, heated to 47.5℃, then 110 parts by weight of an epoxy resin with a number average molecular weight of 7000 and a softening point of 148℃ were added, and stirred at constant temperature, then the temperature was lowered to room temperature, 47.5 parts by weight of 3-methyltetrahydrophthalic anhydride, 2.5 parts by weight of epoxy soybean oil, and 0.6 parts by weight of a polyacrylate with a number average molecular weight of 5500 were added, and stirred and reacted for 2 h at a stirring speed of 160 r / min, and after the stirring was completed, an outer paint was obtained.

[0060] Comparative Example 1 The difference between this example and Example 3 was that no additive based on nano-cellulose-zirconium silicate combined modification was added in the preparation of the intermediate modified paint.

[0061] Comparative Example 2 The difference between this example and Example 3 was that no modifier based on nano-cellulose-zirconium silicate combined modification was added in the preparation of the additive based on nano-cellulose-zirconium silicate combined modification.

[0062] Comparative Example 3 The difference between this example and Example 3 was that no zirconium silicate combined material was added in the preparation of the modifier based on zirconium silicate combined modification.

[0063] Comparative Example 4 Different from example 3 is that no diamond powder and alumina are added in the zirconium silicate combination material.

[0064] Comparative example 5 Different from example 3 is that no nano-cellulose-based blending liquid is added in the preparation of the nano-cellulose-silicon dioxide combination additive.

[0065] Comparative example 6 Different from example 3 is that no nano-cellulose and lanthanum oxide are added in the nano-cellulose-based blending liquid.

[0066] Comparative example 7 Different from example 3 is that no nano-aluminum nitride-doped comprehensive additive is added.

[0067] Comparative example 8 Different from example 3 is that no nano-aluminum nitride-graphene hybrid liquid is added in the preparation of the nano-aluminum nitride-doped comprehensive additive.

[0068] Comparative example 9 Different from example 3 is that no pretreated nano-aluminum nitride is added in the preparation of the nano-aluminum nitride-graphene hybrid liquid.

[0069] Comparative example 10 Different from example 3 is that no graphene and titanium dioxide are added in the graphene liquid in the preparation of the nano-aluminum nitride-graphene hybrid liquid.

[0070] Comparative example 11 Different from example 3 is that the β-cyclodextrin liquid is replaced by an ethanol solution with a mass fraction of 80% in the preparation of the nano-aluminum nitride-graphene hybrid liquid.

[0071] Comparative example 12 Different from example 3 is that no basalt fiber agent is added in the preparation of the nano-aluminum nitride-doped comprehensive additive.

[0072] The products of examples 1-3 and comparative examples 1-12 are subjected to electrical performance, thermal conductivity performance, salt spray resistance (5% sodium chloride salt spray), high temperature resistance (500°C), and product impact resistance and waterproof performance tests, and the performance tests are shown in Table 1, which is a comprehensive performance test result table of the products. Table 1:

[0073] From examples 1-3 and comparative examples 1-12, it can be seen that the insulation resistance coefficient of example 3 can reach 527.5 Ω / cm. The impact strength can reach 68 cm, the thermal conductivity can reach 0.799 W / (m.K), the water contact angle can reach 148 degrees, the salt mist resistance time can be up to 1161h, the high temperature resistance time can be up to 1057h, the electrical performance, thermal conductivity, salt mist resistance, high temperature resistance, impact resistance and water resistance of the product are excellent, and the comprehensive performance of the product can be improved in a coordinated manner; As seen from the comparative examples 1-12 and the example 3, without adding one of the additives based on the nano-cellulose-zirconium silicate combined modification and the blending agent doped with nano-aluminum nitride in the preparation of the intermediate modified paint, the product performance is significantly poor, and only by using the two in a coordinated manner, the product performance effect is the most significant; Without adding the zirconium silicate combined modifier in the preparation of the additive based on the nano-cellulose-zirconium silicate combined modification, without adding the zirconium silicate combined material in the preparation of the zirconium silicate combined modifier, without adding the diamond powder and the aluminum oxide in the zirconium silicate combined material, without adding the nano-cellulose in the preparation of the additive based on the nano-cellulose-zirconium silicate combined modification, and without adding the nano-cellulose and the lanthanum oxide in the nano-cellulose blending liquid, the product performance has a different degree of deterioration trend, the additive based on the nano-cellulose-zirconium silicate combined modification prepared by using the nano-cellulose blending liquid and the zirconium silicate combined modifier obtained by the specific method has the most significant product performance effect, and the effect is not obvious by using other methods instead. Without adding the nano-aluminum nitride-graphene hybrid liquid in the preparation of the blending agent doped with nano-aluminum nitride, without adding the pretreated nano-aluminum nitride in the preparation of the nano-aluminum nitride-graphene hybrid liquid, without adding the graphene and the titanium dioxide in the graphene liquid in the preparation of the nano-aluminum nitride-graphene hybrid liquid, and without adding the basalt fiber agent in the preparation of the blending agent doped with nano-aluminum nitride, the product performance has a different degree of deterioration trend; Meanwhile, without adding the basalt fiber agent in the preparation of the blending agent doped with nano-aluminum nitride, the product performance has a relatively large change trend, and the preparation of the nano-aluminum nitride-graphene hybrid liquid has the specificity, the blending agent doped with nano-aluminum nitride obtained by using the specific method has the most significant product performance effect.

[0074] The application further explores the performance of the product by the basalt fiber agent; Experimental example 1 The same as example 3, only the treatment liquid is not added in the basalt fiber agent.

[0075] Experimental example 2 The same as example 3, only the mica powder is not added in the treatment liquid.

[0076] Experimental example 3 The same as example 3, except that no quartz powder is added in the treatment liquid.

[0077] Experimental example 4 The same as example 3, except that no halloysite nanotube is added in the treatment liquid.

[0078] Experimental example 5 The same as example 3, except that no basalt fiber is added in the basalt fiber agent.

[0079] The products of experimental examples 1-5 are further tested for performance, and the performance test is shown in Table 2 below, which is the performance influence test of the basalt fiber agent on the product, as shown in Table 2 below. Table 2

[0080] From experimental examples 1-5, it can be seen that the performance of the product is most obviously poor when no treatment liquid is added in the basalt fiber agent and no basalt fiber is added in the basalt fiber agent. When no mica powder is added in the treatment liquid, no quartz powder is added in the treatment liquid, and no halloysite nanotube is added in the treatment liquid, the performance of the product has a tendency to deteriorate. Only when the treatment liquid prepared by the specific method of the present application is combined with the basalt fiber to form the specific basalt fiber agent, the performance of the product is most significant. In the preparation of the basalt fiber agent, the raw materials are indispensable. Only when the specific raw material ratio of the present application is used, the effect of other raw material ratios is not as significant as that of the present application.

[0081] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application should be defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and range of equivalents of the claims.

[0082] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A process for preparing an ultra-thin paint-film transposed conductor, characterized by, It comprises the following steps: Step one: take copper wire as the base material, and clean it with anhydrous ethanol for 12-15 minutes under ultrasonic waves with a power of 350-400 W; after the ultrasonic cleaning, dry the copper wire at 145-155 C until the water content on the surface is less than 0.1%; Step two: coat the base material treated in step one with acetal paint with a thickness of 0.01-0.02 mm, then coat it with intermediate modified paint with a thickness of 0.03-0.04 mm, and finally coat it with topcoat with a thickness of 0.02-0.03 mm; Step three: process the copper wire treated in step two into transposed wire, and thus obtain the transposed wire with ultra-thin paint film.

2. The preparation process of an ultra-thin paint film transposed conductor according to claim 1, characterized in that, All the coating processes are followed by drying at a temperature of 180-500 C for 20-30 minutes; The specific operation method for processing the copper wire into transposed wire is as follows: Take 5-87 copper wires treated in step two and process them into transposed wire harness through a transposed wire device; and then wrap the insulating net around the transposed wire harness to form an insulating net layer with a thickness of 0.23-0.28 mm, and the wrapping tension of the insulating net is controlled within 15-23 N.

3. The process for preparing an ultra-thin paint film transposed conductor according to claim 2, characterized in that, The intermediate modified paint comprises the following raw materials by weight: Epoxy resin E51 30-35 parts, nano-cellulose-zirconium silicate combined modified additive 8-12 parts, nano-aluminum nitride doped comprehensive additive 7-11 parts, curing agent 4-7 parts, curing accelerator 3-5 parts, ethanol solvent 20-25 parts, and silane coupling agent KH560 4-7 parts.

4. The manufacturing process of an ultra-thin paint film transposed conductor according to claim 3, characterized in that, The curing agent is p-xylene aniline; and the curing accelerator is 2-methyl imidazole.

5. The process for preparing an ultra-thin paint film transposed conductor according to claim 3, wherein The preparation method of the nano-cellulose-zirconium silicate combined modified additive is as follows: S01: first prepare a sodium alginate solution with a mass fraction of 10-15% and a sodium silicate solution with a mass fraction of 4-7%; The following are measured by weight: 5-8 parts of nano-cellulose, 2-5 parts of lanthanum oxide, 8-12 parts of sodium alginate solution, and 1-3 parts of sodium silicate solution are uniformly blended and stirred to obtain a nano-cellulose-based blending liquid; S02: preparation of the zirconium silicate combined modifier: S02a: blend and sinter 3-5 parts of zirconium silicate, 2-4 parts of diamond powder, and 1-3 parts of aluminum oxide for 1-1.5 hours at a sintering temperature of 300-350 C, and sinter for 1-2 hours; after the sintering, a zirconium silicate combined material is obtained; S02b: blend and fully mix 2-4 parts of sodium carboxymethyl cellulose, 1-2 parts of nano-silica sol, 5-8 parts of dopamine hydrochloride solution, and 2-3 parts of citric acid to obtain a modified liquid; Blend and fully mix 5-8 parts of the zirconium silicate combined material and 8-11 parts of the modified liquid, then filter and dry to obtain the zirconium silicate combined modifier; S03: ball mill the nano-cellulose-based blending liquid and the zirconium silicate combined modifier according to a weight ratio of (11-15):7; after the ball milling, filter and dry to obtain the nano-cellulose-zirconium silicate combined modified additive.

6. The process for preparing an ultra-thin paint-film transposed conductor according to claim 5, wherein The mass fraction of the dopamine hydrochloride solution is 7-11%; and the ball milling speed in S03 is 1200-1500 r / min, and the ball milling time is 2-3 hours.

7. The process for preparing an ultra-thin paint film transposed conductor according to claim 1, wherein The preparation method of the nano-aluminum nitride doped comprehensive additive is as follows: S11: the nano-aluminum nitride is stirred in a sufficient amount of 10-15wt% potassium permanganate solution, then washed with boiling water for 3-5 times to obtain the pretreated nano-aluminum nitride; The β-cyclodextrin, silane coupling agent KH550 and ethanol aqueous solution are blended in a weight ratio of (3-5):2:(5-8) to obtain a β-cyclodextrin solution; S12: 3-5 parts of graphene, 2-4 parts of titanium dioxide and 5-8 parts of the β-cyclodextrin solution are blended in a weight ratio of 3-5:2:5-8 to obtain a graphene solution; 4-7 parts of the pretreated nano-aluminum nitride and 5-8 parts of the graphene solution are subjected to ultrasonic treatment, and after the ultrasonic treatment, a nano-aluminum nitride-graphene hybrid solution is obtained; S13: the nano-aluminum nitride-graphene hybrid solution and the basalt fiber agent are mixed in a weight ratio of (7-11):5, and then subjected to ball milling at a rotation speed of 1000-1500r / min for 2-3h; after the ball milling, the mixture is subjected to suction filtration and drying to obtain a basalt fiber agent doped with nano-aluminum nitride.

8. The process for preparing an ultra-thin paint-film transposed conductor according to claim 7, characterized in that, The ethanol aqueous solution has a mass fraction of 75-85%, and the ultrasonic treatment is performed at an ultrasonic power of 450-500W for 1-2h.

9. The process for preparing an ultra-thin paint-film transposed conductor according to claim 7, wherein The basalt fiber agent is prepared by: The basalt fiber is preheated at 55-60℃ for 1-2h to obtain preheated basalt fiber, and then the preheated basalt fiber is immersed in a treatment solution in an amount of 5-8 times the weight of the preheated basalt fiber; the immersion is performed at an ultrasonic power of 350-400W for 1-2h; after the immersion, the mixture is subjected to suction filtration and drying to obtain the basalt fiber agent; The treatment solution comprises the following raw materials in a weight ratio of 3-5 parts of mica powder, 2-5 parts of quartz powder, 2-3 parts of halloysite nanotubes and 5-8 parts of 10-15wt% sodium dodecyl sulfate solution.

10. The process for preparing an ultra-thin paint film transposed conductor according to claim 1, wherein The outer paint is prepared by: 120-130 parts by weight of dimethylbenzene are added to a reaction kettle, and then the kettle is heated to 45-50℃; then 100-120 parts by weight of epoxy resin with a number average molecular weight of 5000-8000 and a softening point of 145-150℃ are added, and the mixture is stirred and kept warm; then the mixture is cooled to room temperature, and 45-50 parts by weight of 3-methyltetrahydrophthalic anhydride, 2-3 parts by weight of epoxy soybean oil and 0.5-0.7 parts by weight of polyacrylate with a number average molecular weight of 5000-6000 are added; the mixture is stirred and reacted for 2h at a stirring speed of 150-170r / min; after the stirring, an outer paint is obtained.

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