Polyester enameled flat copper wire and preparation process therefor

Abstract

A polyester enameled flat copper wire and a preparation process therefor. By adding silicon carbide, the hardness, wear resistance and heat resistance of the polyester enamel are improved, thereby preventing deformation of or damage to the coating at high temperatures; the addition of silicon carbide also enhances the resistance of the polyester enamel to chemical substances such as acids and bases, thereby improving the chemical corrosion resistance of the polyester enamel; palladium hydroxide / carbon is also added to further improve the performance of the polyester enamel; the addition of palladium hydroxide / carbon improves the oxidation resistance and ultraviolet resistance of the polyester enamel, thereby prolonging the service life of the prepared polyester enameled flat copper wire.

Description

Polyester enameled copper flat wire and preparation process thereof TECHNICAL FIELD

[0001] The present application belongs to the technical field of enameled copper flat wire, and relates to a polyester enameled copper flat wire and a preparation process thereof. BACKGROUND

[0002] With the improvement of working level in China, the enameled wire industry has been well developed, and the enameled wire is widely used in various fields. However, the existing enameled wire structure contains many paint layers, and each paint layer structure is composed of many single layers.

[0003] However, the thickness of each single layer structure of the existing enameled wire is uneven, so that the existing enameled wire structure generally has uneven performance and poor heat resistance. Since the performance of the enameled wire is affected by temperature change, if the high-temperature resistance is poor, the coating of the enameled wire will soften and deform, resulting in short service life and poor adhesion of the enameled wire.

[0004] Therefore, the polyester enameled copper flat wire prepared by modifying the polyester paint has high mechanical strength, high-temperature resistance and long service life. SUMMARY

[0005] The present application belongs to the technical field of enameled copper flat wire, and relates to a polyester enameled copper flat wire and a preparation process thereof.

[0006] The object of the present application can be achieved by the following technical solutions:

[0007] A polyester enameled copper flat wire comprises an inner layer of copper conductor wire and an outer layer of modified polyester paint.

[0008] By weight percentage, the saturated polyester resin is 15-20%, the phenolic resin is 15-20%, the epoxy acrylic resin is 20-30%, the styrene is 20-30%, the silicon carbide is 5-10%, the palladium hydroxide / carbon is 2-5%, the dispersing agent is 1-3%, the diluent is 1-2%, and the curing agent is 1-5%.

[0009] The specific preparation process of the modified polyester paint is as follows.

[0010] S1: The epoxy acrylic resin is heated to 200 DEG C and then the styrene is added in a mass ratio of 1:1, and stirring is performed at a speed of 400 r / min for 2 h to obtain a mixture A.

[0011] S2: The saturated polyester resin and the phenolic resin are mixed in proportion, heated to 200 DEG C, and stirred at a speed of 400 r / min for 2 h to obtain a mixture B.

[0012] S3: Add mixture B to mixture A, continue stirring at 200℃ and 400r / min, and add silicon carbide, palladium hydroxide on carbon, dispersant, and diluent in proportion, stir for 1h, then slowly cool to 50℃, to obtain mixture C;

[0013] S4: Add curing agent to mixture C in proportion, stir at 300r / min, stir for 1h, then stand for 24h, to obtain the modified polyester paint.

[0014] Further, the saturated polyester resin is one or more of polyethylene terephthalate, polybutylene terephthalate, and polyarylate.

[0015] Further, the dispersant is polyethylene glycol with a molecular weight of 800-1000.

[0016] Further, the diluent is one or more of methyl formate, butyl acetate, and acetone.

[0017] Further, the curing agent is one of diisocyanate and triisocyanate.

[0018] A preparation method of a polyester paint covered copper flat wire, the preparation method of the polyester paint covered copper flat wire is as follows,

[0019] S61: uniformly release the metal copper wire from the iron shaft, perform flat wire drawing operation through the flat die on the wire drawing equipment, and then perform calendering operation through the calendering die on the wire drawing equipment, to obtain the copper flat wire;

[0020] S62: transfer the drawn copper flat wire into the annealing furnace, and perform annealing at a speed of 150 m / min under nitrogen atmosphere;

[0021] S63: use the ultrasonic cleaning machine to perform ultrasonic cleaning on the annealed copper flat wire, to obtain clean copper flat wire;

[0022] S64: use 50℃ nitrogen gas to blow the copper flat wire at a flow rate of 8m / s, to obtain surface dry and clean copper flat wire;

[0023] S65: spray the modified polyester paint prepared on the surface of the copper flat wire, and perform drying treatment by laser irradiation, stand for 12h after drying, to obtain the product polyester paint covered copper flat wire.

[0024] Further, the parameters of the spraying method in S65 are spraying distance of 100-150mm and spraying rate of 80-100mm / s.

[0025] Further, the laser irradiation in S65 has a laser power of 300W, a temperature of 60℃, and an irradiation time of 20min.

[0026] Further, the thickness of the polyester paint on the surface of the prepared polyester enameled copper flat wire is 0.3 mm.

[0027] During the curing process of the polyester paint, the styrene monomer and the -CH=CH- structure in the unsaturated polyester further undergo cross-linking and curing reactions under the action of the curing agent. This reaction causes the linear molecules of the unsaturated polyester to cross-link through the styrene monomer, thereby connecting to form a thermosetting unsaturated polyester resin with a three-dimensional structure. This process enables the polyester paint film to have higher strength and better performance.

[0028] In the present application, silicon carbide is added to the polyester paint, which can significantly improve the hardness and wear resistance of the polyester paint. As a high-hardness material, silicon carbide can effectively enhance the coating structure of the polyester paint, making its surface more hard and less prone to wear and tear. In a high-temperature environment, silicon carbide can maintain stable physical and chemical properties, so the addition of silicon carbide can also improve the high-temperature resistance of the polyester paint, thereby enhancing the heat resistance of the polyester paint and preventing the coating from deforming or being damaged at high temperatures. The addition of silicon carbide can also enhance the resistance of the polyester paint to chemicals such as acids and bases, thereby improving the chemical corrosion resistance of the polyester paint and extending the service life of the coating. Silicon carbide also helps to improve the gloss of the polyester paint, making the coating more bright and beautiful, and it also helps to maintain the color stability of the polyester paint and prevent it from fading.

[0029] In the present application, palladium hydroxide / carbon is also added to further improve the performance of the polyester paint. The addition of palladium hydroxide / carbon can improve the weather resistance of the polyester paint, enhance its antioxidant and ultraviolet resistance, and prolong the service life of the prepared polyester enameled copper flat wire. Palladium hydroxide / carbon can also improve the wear resistance of the polyester paint. The hardness of carbon is relatively high, and when combined with palladium hydroxide, it can make the polyester paint coating more hard and reduce wear and tear caused by friction.

[0030] The beneficial effects of the present application are as follows:

[0031] The present application improves the hardness, wear resistance, and heat resistance of the polyester paint by adding silicon carbide, preventing the coating from deforming or being damaged at high temperatures. The addition of silicon carbide also enhances the resistance of the polyester paint to chemicals such as acids and bases, thereby improving the chemical corrosion resistance of the polyester paint. The present application also adds palladium hydroxide / carbon to further improve the performance of the polyester paint. The addition of palladium hydroxide / carbon enhances the antioxidant and ultraviolet resistance of the polyester paint, and the prepared polyester enameled copper flat wire has a longer service life. DETAILED DESCRIPTION

[0032] To further illustrate the technical means and effects taken by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail below.

[0033] Proportioning ratio 1: polyethylene terephthalate 15%, phenolic resin 15%, epoxy acrylate resin 25%, styrene 25%, silicon carbide 10%, palladium hydroxide on carbon 5%, PEG-1000 1%, acetone 2%, diisocyanate 2%;

[0034] Proportioning ratio 2: polyethylene terephthalate 20%, phenolic resin 20%, epoxy acrylate resin 20%, styrene 20%, silicon carbide 10%, palladium hydroxide on carbon 5%, PEG-1000 1%, acetone 2%, diisocyanate 2%;

[0035] Proportioning ratio 3: polyethylene terephthalate 15%, phenolic resin 15%, epoxy acrylate resin 30%, styrene 30%, silicon carbide 5%, palladium hydroxide on carbon 2%, PEG-1000 1%, acetone 1%, diisocyanate 1%;

[0036] Proportioning ratio 4: polyethylene terephthalate 15%, phenolic resin 20%, epoxy acrylate resin 20%, styrene 20%, silicon carbide 10%, palladium hydroxide on carbon 5%, PEG-1000 3%, acetone 2%, diisocyanate 5%;

[0037] Comparative proportioning ratio 1: polyethylene terephthalate 15%, phenolic resin 15%, epoxy acrylate resin 25%, styrene 25%, palladium hydroxide on carbon 5%, PEG-1000 1%, acetone 2%, diisocyanate 2%, deionized water 10%;

[0038] Comparative proportioning ratio 2: polyethylene terephthalate 15%, phenolic resin 15%, epoxy acrylate resin 25%, styrene 25%, silicon carbide 10%, PEG-1000 1%, acetone 2%, diisocyanate 2%, deionized water 5%;

[0039] The specific preparation process of the modified polyester paint is as follows,

[0040] S1: heat the epoxy acrylate resin to 200℃, and then add styrene in a mass ratio of 1:1 after being in a molten state, stir at a speed of 400r / min, and the stirring time is 2h, to obtain mixture A;

[0041] S2: mix polyethylene terephthalate and phenolic resin according to the proportion, heat to 200℃, and stir at a speed of 400r / min, and the stirring time is 2h, to obtain mixture B;

[0042] S3: Add mixture B to mixture A, continue stirring at 200℃ and 400r / min, and add silicon carbide, palladium hydroxide on carbon, PEG-1000 and acetone in proportion, stir for 1h, then slowly cool to 50℃ to obtain mixture C;

[0043] S4: Add diisocyanate to mixture C in proportion, stir at 300r / min, stir for 1h, and stand for 24h to obtain the modified polyester paint.

[0044] Example 1

[0045] S61: Uniformly release the copper wire from the iron shaft, perform wire drawing operation through the flat die on the wire drawing equipment, and then perform calendering operation through the calendering die on the wire drawing equipment to obtain copper flat wire;

[0046] S62: Transfer the copper flat wire after wire drawing into the annealing furnace, and perform annealing at a speed of 150 m / min under nitrogen atmosphere;

[0047] S63: Use ultrasonic cleaning machine to ultrasonically clean the copper flat wire after annealing to obtain clean copper flat wire;

[0048] S64: Use nitrogen gas at 50℃ at a flow rate of 8m / s to blow the copper flat wire to obtain surface-dried and clean copper flat wire;

[0049] S65: Spray the modified polyester paint prepared according to the proportion 1 on the surface of the copper flat wire, the spraying distance is 100mm, the spraying rate is 100mm / s, and the laser irradiation is used for drying treatment, the laser power of the laser irradiation is 300W, the temperature is 60℃, the irradiation time is 20min, and the product polyester enameled copper flat wire is obtained after drying and standing for 12h.

[0050] Example 2

[0051] S61: Uniformly release the copper wire from the iron shaft, perform wire drawing operation through the flat die on the wire drawing equipment, and then perform calendering operation through the calendering die on the wire drawing equipment to obtain copper flat wire;

[0052] S62: Transfer the copper flat wire after wire drawing into the annealing furnace, and perform annealing at a speed of 150 m / min under nitrogen atmosphere;

[0053] S63: Use ultrasonic cleaning machine to ultrasonically clean the copper flat wire after annealing to obtain clean copper flat wire;

[0054] S64: Use nitrogen gas at 50℃ at a flow rate of 8m / s to blow the copper flat wire to obtain surface-dried and clean copper flat wire;

[0055] S65: Spraying the modified polyester paint prepared according to the ratio 2 on the surface of the copper flat wire, the spraying distance is 150 mm, the spraying speed is 100 mm / s, and drying treatment is performed by laser irradiation, the laser power of the laser irradiation is 300 W, the temperature is 60 DEG C, the irradiation time is 20 min, and the product polyester enameled copper flat wire is obtained after drying and standing for 12 h.

[0056] Example 3

[0057] S61: The metal copper wire is uniformly discharged from the iron shaft, subjected to a drawing operation through a flat type die on the drawing equipment, and then subjected to a calendering operation through a calendering die on the drawing equipment to obtain a copper flat wire;

[0058] S62: The copper flat wire subjected to the drawing is transferred into an annealing furnace, and annealing is performed at a speed of 150 m / min under a nitrogen atmosphere;

[0059] S63: The copper flat wire after annealing is subjected to ultrasonic cleaning by using an ultrasonic cleaning machine to obtain a clean copper flat wire;

[0060] S64: The copper flat wire is blown at a flow rate of 8 m / s using nitrogen gas at 50 DEG C to obtain a copper flat wire with a dry and clean surface;

[0061] S65: Spraying the modified polyester paint prepared according to the ratio 3 on the surface of the copper flat wire, the spraying distance is 100 mm, the spraying speed is 80 mm / s, and drying treatment is performed by laser irradiation, the laser power of the laser irradiation is 300 W, the temperature is 60 DEG C, the irradiation time is 20 min, and the product polyester enameled copper flat wire is obtained after drying and standing for 12 h.

[0062] Example 4

[0063] S61: The metal copper wire is uniformly discharged from the iron shaft, subjected to a drawing operation through a flat type die on the drawing equipment, and then subjected to a calendering operation through a calendering die on the drawing equipment to obtain a copper flat wire;

[0064] S62: The copper flat wire subjected to the drawing is transferred into an annealing furnace, and annealing is performed at a speed of 150 m / min under a nitrogen atmosphere;

[0065] S63: The copper flat wire after annealing is subjected to ultrasonic cleaning by using an ultrasonic cleaning machine to obtain a clean copper flat wire;

[0066] S64: The copper flat wire is blown at a flow rate of 8 m / s using nitrogen gas at 50 DEG C to obtain a copper flat wire with a dry and clean surface;

[0067] S65: Spraying the modified polyester paint prepared according to the ratio 4 on the surface of the copper flat wire, the spraying distance is 100 mm, the spraying speed is 100 mm / s, and the drying treatment is performed by laser irradiation, the laser power of the laser irradiation is 300 W, the temperature is 60 DEG C, the irradiation time is 20 min, and after drying, the product polyester enameled copper flat wire is obtained after standing for 12 h.

[0068] Comparative Example 1

[0069] The difference between Comparative Example 1 and Example 1 is that the modified polyester paint used in S65 is the modified polyester paint of Comparative Example 1, and the remaining steps are the same.

[0070] Comparative Example 2

[0071] The difference between Comparative Example 2 and Example 1 is that the modified polyester paint used in S65 is the modified polyester paint of Comparative Example 2, and the remaining steps are the same.

[0072] The polyester enameled copper flat wire prepared is tested for mechanical strength according to GB / T 6109.2-2008 as the standard, and the specific test method is as follows,

[0073] The test sample is installed on the tensile testing machine, and the installation direction of the sample is ensured to be consistent with the tensile direction;

[0074] The tensile speed is set to 2 mm / s, the tensile force is 200 N, and the tensile time is 20 s;

[0075] The tensile condition is recorded and the tensile strength of the sample is analyzed.

[0076] The polyester enameled copper flat wire prepared is tested for bending modulus according to GB / T 9341-2008 as the standard, the polyester enameled copper flat wire sample is fixed on the clamps of the bending testing machine, and it is ensured that the sample will not slide or shift during the test, and a constant bending force is applied to the sample by the test equipment to cause bending deformation.

[0077] The experimental results of the examples and comparative examples are as follows,

[0078] Modified polyester paint ratio Tensile strength (MPa) Bending modulus (MPa) Example 1 Ratio 1 2 4 9 7 Example 2 Ratio 2 1 8 4 7 6 Example 3 Ratio 3 1 9 1 4 7 0 Example 4 Ratio 4 1 8 1 4 7 9 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 9 8 1 3 2 5 10 1 1 3 5 2

[0079] From the experimental results, it can be seen that the modification of the polyester paint effectively improves the mechanical strength of the product polyester enameled copper flat wire prepared, and the Example 1 is the best embodiment.

[0080] When the present application is used:

[0081] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been described above with preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solutions of the present application. Any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still falls within the scope of the technical solutions of the present application.

Claims

1. A polyester enamelled flat copper wire comprising an inner layer of metallic copper conductor wire and an outer layer of modified polyester enamel, characterised in that, The modified polyester paint formula is as follows, Saturated polyester resin 15-20%, phenolic resin 15-20%, epoxy acrylic resin 20-30%, styrene 20-30%, silicon carbide 5-10%, palladium hydroxide on carbon 2-5%, dispersant 1-3%, diluent 1-2%, curing agent 1-5% by weight percentage, The specific preparation process of the modified polyester paint is as follows, S1: heat the epoxy acrylic resin to 200℃, and then add styrene in a mass ratio of 1:1 after being in a molten state, stir at a speed of 400r / min, and stir for 2h to obtain mixture A; S2: mix the saturated polyester resin and the phenolic resin according to the proportion, heat to 200℃, and stir at a speed of 400r / min for 2h to obtain mixture B; S3: add mixture B to mixture A, continue to stir at a temperature of 200℃ and a speed of 400r / min, and add silicon carbide, palladium hydroxide on carbon, dispersant, and diluent according to the proportion, stir for 1h, then slowly cool to 50℃ to obtain mixture C; S4: add the curing agent to mixture C according to the proportion, stir at a speed of 300r / min, and after stirring for 1h, stand for 24h to obtain the modified polyester paint.

2. The polyester enamelled flat copper wire of claim 1, wherein, The saturated polyester resin is one or more of polyethylene terephthalate, polybutylene terephthalate, and polyarylate.

3. The polyester enamelled rectangular copper wire of claim 1, wherein, The dispersant is polyethylene glycol with a molecular weight of 800-1000.

4. The polyester enamelled rectangular copper wire of claim 1, wherein, The diluent is one or more of methyl formate, butyl acetate, and acetone.

5. The polyester enamelled rectangular copper wire of claim 1, wherein, The curing agent is one of diisocyanate and triisocyanate.

6. A method for preparing a polyester enameled flat copper wire, implemented based on the polyester enameled flat copper wire according to any one of claims 1 to 5, characterized in that, The preparation method of the polyester paint covered copper flat wire is as follows, S61: uniformly release the metal copper wire from the iron shaft, perform flattening operation on the flattening die of the wire drawing equipment, and then perform calendering operation on the calendering die of the wire drawing equipment to obtain the copper flat wire; S62: transfer the drawn copper flat wire into the annealing furnace, and perform annealing at a speed of 150 m / min under nitrogen atmosphere; S63: use the ultrasonic cleaning machine to clean the annealed copper flat wire to obtain clean copper flat wire; S64: use 50℃ nitrogen gas to blow the copper flat wire at a flow rate of 8m / s to obtain surface-dried and clean copper flat wire; S65: spray the modified polyester paint prepared on the surface of the copper flat wire, and perform drying treatment by laser irradiation, stand for 12h after drying to obtain the product polyester paint covered copper flat wire.

7. The method of producing a polyester enamelled flat copper wire according to claim 6, characterized in that, The parameters of the spraying method in S65 are a spraying distance of 100-150mm and a spraying rate of 80-100mm / s.

8. The method for preparing a polyester enameled copper flat wire according to claim 6, characterized in that, The laser irradiation in S65 has a laser power of 300W, a temperature of 60℃, and an irradiation time of 20min.

9. The method for preparing a polyester enameled copper flat wire according to claim 6, characterized in that, The thickness of the polyester paint on the surface of the prepared polyester paint covered copper flat wire is 0.3mm.