A method for preparing rat- and ant-proof flexible busbar

Abstract

The present invention discloses a method for preparing a rat- and ant-proof flexible busbar, which belongs to the technical field of busbars. The flexible busbar uses a copper wire busbar as its inner core. The outer surface of the copper wire busbar is covered with a high-strength insulation layer. The outer surface of the high-strength insulation layer is covered with an XLPE natural moisture-proof layer. The outer surface of the XLPE natural moisture-proof layer is covered with a metal wrapping layer. The outer surface of the metal wrapping layer is covered with a high-density PE layer. The outer surface of the high-density PE layer is covered with a nylon protective layer. The nylon protective layer is made of a rat- and ant-proof composite nylon material. The rat- and ant-proof composite nylon material includes amino acid grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat- and ant-proof layered double metal hydroxide, lubricant, and antioxidant. The components cooperate with each other, and the prepared composite nylon material cooperates with protective layers such as metal wrapping layers to effectively prevent the invasion of rats and ants.

Description

Technical Field

[0001] The present invention relates to the technical field of busbars, and in particular to a method for preparing a rat- and ant-proof flexible busbar. Background Art

[0002] Busbars are used to transmit electrical energy in power systems, collecting and distributing electricity. They are typically made of highly conductive copper or aluminum and come in a variety of shapes and structures. Busbars are typically rigid and difficult to bend, limiting their use in applications where space is limited or where frequent bending is required. To achieve flexible busbar wiring, special designs such as plug-in bus ducts are typically used to accommodate complex wiring environments. However, these plug-in bus ducts are prone to electromagnetic interference, increasing maintenance complexity. Furthermore, they require additional space for the plug-in boxes and connection points, making them unsuitable for space-constrained applications. Furthermore, during use, busbars are susceptible to attack by pests such as rats and ants, leading to equipment damage and safety hazards. To protect busbars from being bitten by small animals such as rats and ants, repellents or toxic substances are typically added to repel or eliminate rats and ants. While this can prevent these small animals from biting, the chemical additives used can easily impact the environment and the health of users, and their effectiveness is often limited.

[0003] For this reason, a new rat-proof and ant-proof flexible busbar is urgently needed. Summary of the Invention

[0004] In view of the defects of the existing technology, the present invention designs a method for preparing a rat- and ant-proof flexible busbar. The busbar prepared can not only effectively reduce the gnawing of rats and ants from multiple layers, but also has good mechanical strength.

[0005] In order to achieve the above purpose, the present invention solves the technical problem by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides a rat-ant-proof flexible busbar, the flexible busbar comprising a copper wire busbar (1), the outer surface of the copper wire busbar (1) being coated with a high-strength insulation layer (2), the outer surface of the high-strength insulation layer (3) being coated with an XLPE natural moisture-proof layer (3), the outer surface of the XLPE natural moisture-proof layer (3) being coated with a metal wrapping layer (4), the outer surface of the metal wrapping layer (4) being coated with a high-density PE layer (5), the outer surface of the high-density PE layer (5) being coated with a nylon protective layer (6); the nylon protective layer (6) being made of a rat-ant-proof composite nylon material.

[0007] Among them, the copper wire busbar, as a conductive material, has good conductivity and corrosion resistance, can effectively transmit power signals and ensure the normal operation of power equipment. At the same time, its corrosion resistance can also extend its service life and reduce maintenance costs.

[0008] The high-strength insulation layer has excellent insulation performance, can effectively prevent leakage and short circuit phenomena in power equipment, and ensure the safe and stable operation of the equipment. In addition, the use of the high-strength insulation layer can effectively reduce the failure rate of power equipment and improve the reliability and safety of the equipment.

[0009] The XLPE natural moisture barrier, with its excellent moisture-proof properties, can effectively prevent moisture from entering the interior of power equipment, thereby extending the service life of the equipment. By using the XLPE natural moisture barrier, it can effectively reduce equipment failures caused by humid environments and improve the stability and reliability of the equipment.

[0010] The metal wrapping layer can effectively protect the electrical equipment from the external environment and pests, thereby extending the service life of the equipment and reducing damage and malfunctions caused by pests.

[0011] The high-density PE layer has good wear resistance and corrosion resistance, can effectively protect the power equipment from the influence of the external environment, and further extend the service life of the equipment.

[0012] The nylon protective layer has good wear resistance and high temperature resistance, can effectively prevent the power equipment from being damaged during use, and improve the durability and stability of the equipment.

[0013] In one embodiment, the rat-ant-proof composite nylon material comprises, by mass, 60-70 parts of amino acid grafted nylon resin, 15-20 parts of polyphthalamide, 8-10 parts of aluminum borate whiskers, 5-9 parts of rat-ant-proof layered double hydroxide, 1-2 parts of lubricant, and 1-2 parts of antioxidant.

[0014] In one embodiment, the rat- and ant-proof composite nylon material comprises, by mass, 65 parts of amino acid grafted nylon resin, 17 parts of polyphthalamide, 9 parts of aluminum borate whiskers, 7 parts of rat- and ant-proof layered double hydroxide, 1.5 parts of lubricant, and 1.5 parts of antioxidant.

[0015] In one embodiment, the preparation of the amino acid grafted nylon resin includes:

[0016] S1. Immerse the nylon resin in an aqueous solution of NH2O·HCl and adjust the pH to 7-9. Shake the mixture at a constant temperature of 75-85°C for 4-6 hours. After the reaction is complete, dry the mixture to obtain a modified nylon resin.

[0017] S2. Add the modified nylon resin to water, then add a cross-linking agent and L-phenylalanine, and react at 25-35°C for 22-26 hours to obtain the amino acid grafted nylon resin.

[0018] In one embodiment, the preparation of the layered double hydroxide comprises:

[0019] (1) Chlorantraniliprole and piperine are placed in an organic solvent and stirred at 60-70° C. for 1-5 hours, cooled to room temperature, and vacuum-dried to obtain a rodent and ant repellent.

[0020] (2) Calcine the LDH powder at 450-550°C for 2-4 hours and cool it to obtain layered hydroxide.

[0021] (3) The rat-ant repellent prepared in step (1) is mixed with NaOH in a mass ratio of 1:(3-7), and then layered hydroxide is added, and the mixture is reacted at 70-80° C. for 20-28 hours under protective gas. After the reaction is completed, the mixture is dried to obtain a rat-ant repellent layered double metal hydroxide.

[0022] In one embodiment, the mass ratio of 99% chlorantraniliprole to 98% piperine is (1-3):1.

[0023] In one embodiment, the lubricant is at least one of liquid paraffin, polyethylene wax, and sodium stearyl fumarate.

[0024] In one embodiment, the antioxidant is a hindered phenol antioxidant.

[0025] In one embodiment, the material of the XLPE natural moisture-proof layer is cross-linked polyethylene.

[0026] In one embodiment, the material of the metal cladding layer is aviation alloy aluminum.

[0027] In one embodiment, the material of the high-density PE layer is high-density polyethylene.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention uses a copper wire busbar as the inner core, the outer surface of the copper wire busbar is covered with a high-strength insulation layer, the outer surface of the high-strength insulation layer is covered with an XLPE natural moisture-proof layer, the outer surface of the XLPE natural moisture-proof layer is covered with a metal wrapping layer, the material of the metal wrapping layer is aviation high-strength aluminum alloy, which can prevent the gnawing of rats and ants; the outer surface of the metal wrapping layer is covered with a high-density PE layer, the material of which is high-hardness high-density PE, which further prevents pests such as rats and ants from invading power equipment, avoids damage to the copper wire busbar, and ensures the safety and reliability of the operation of power and communication lines.

[0030] Then, the present invention coats the outer surface of the high-density PE layer with a nylon protective layer made of a rat-ant-proof composite nylon material. By grafting L-phenylalanine onto the nylon resin through a cross-linking agent, the polarity of the nylon resin can be increased and the compatibility with other materials can be improved. At the same time, due to the π-π stacking and hydrogen bonding between the aromatic ring and amino group of the L-phenylalanine and the nylon resin, the mechanical strength and toughness of the composite material are provided. The aromatic structure of the L-phenylalanine has high thermal stability, and cooperates and synergizes with other components such as polyphthalamide, aluminum borate whiskers, rat-ant-proof layered double metal hydroxide, lubricant, and antioxidant, thereby improving the heat deformation temperature and heat resistance of the composite material.

[0031] Furthermore, the present invention utilizes the rodent and ant repellent composed of chlorantraniliprole and piperine to be inserted into the layered double metal hydroxide, thereby realizing a sustained release function and achieving the purpose of long-term protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural schematic diagram of a rat and ant-proof flexible busbar provided by an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Copper wire busbar; 2. High-strength insulation layer; 3. XLPE natural moisture-proof layer; 4. Metal wrapping layer; 5. High-density PE layer; 6. Nylon protective layer. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the present invention, the test methods used are conventional methods unless otherwise specified; the materials, reagents, etc. used are reagents and materials that can be obtained from commercial channels unless otherwise specified.

[0038] In the present invention, the hardener used is a substance that can crosslink high-density polyethylene (HDPE) from a linear structure to a network or body structure, and is not limited to triethylenetetramine, but can also be dipropylenetriamine, diethylaminopropylamine, etc.

[0039] An embodiment of the present invention provides a rat- and ant-proof flexible busbar, which includes a copper wire busbar 1, a high-strength insulation layer 2, an XLPE natural moisture-proof layer 3, a metal wrapping layer 4, a high-density PE layer 5 and a nylon protective layer 6.

[0040] like Figure 1 As shown, the copper wire busbar 1 is located at the center of the busbar, and its outer surface is covered with a high-strength insulation layer 2, the outer surface of the high-strength insulation layer 2 is covered with an XLPE natural moisture-proof layer 3, the outer surface of the XLPE natural moisture-proof layer 3 is covered with a metal wrapping layer 4, the outer surface of the metal wrapping layer 4 is covered with a high-density PE layer 5, and the outer surface of the high-density PE layer 5 is covered with a nylon protective layer 6.

[0041] Specifically, the copper wire busbar 1 uses 32 bare copper wires with a diameter of 3 mm; the material of the high-strength insulation layer is high-strength insulation material; the material of the XLPE natural moisture-proof layer is cross-linked polyethylene; the material of the metal wrapping layer is aviation alloy aluminum; the material of the high-density PE layer is high-density polyethylene (HDPE); the material of the nylon protective layer 6 is rat-proof and ant-proof composite nylon material.

[0042] The preparation method of the rat-proof and ant-proof flexible busbar comprises the following steps:

[0043] 1. Preparation of copper wire bar 1: A plurality of bare copper wires are arranged through a stretching and twisting process to obtain copper wire bar 1.

[0044] 2. Preparation of high-strength insulation layer 2: After melting polyvinyl chloride (PVC) particles, extrude them through an extruder and wrap them around the outer surface of the copper wire bar 1. Cool them to form a high-strength insulation layer 2 with a thickness of 2 mm.

[0045] 3. Preparation of XLPE natural moisture barrier layer 3: After melting cross-linked polyethylene plastic particles, extrude them through an extruder and wrap them around the outer surface of the high-strength insulation layer 2. Cool them to form XLPE natural moisture barrier layer 3 with a thickness of 1 mm.

[0046] 4. Preparation of metal wrapping layer 4: Aviation alloy aluminum wire with a wire diameter of 2 mm is braided on the outer surface of XLPE natural moisture-proof layer 3 to form metal wrapping layer 4 with a thickness of 2 mm; the braiding angle is 45°, and the braiding density is greater than 90%.

[0047] 5. Preparation of high-density PE layer 5: High-density polyethylene (HDPE) particles and hardener (triethylenetetramine) are mixed in a ratio of 20:3 and melted, and then wrapped around the outer surface of the metal wrapping layer 4 using injection molding technology through a mold and cooled to form a high-density PE layer 5 with a thickness of 1 mm.

[0048] 6. Preparation of Nylon Protective Layer 6: Amino acid-grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat-ant-resistant layered double hydroxide, lubricant, and antioxidant were mixed and extruded into granules. The mixture was then melted and injection molded onto the outer surface of high-density PE layer 5 using an injection molding machine. The mixture was cooled to form a nylon protective layer having a thickness of 1 mm. The specific formula of the rat-ant-resistant composite nylon material is shown in Table 1 below.

[0049] Table 1: Formula of rat- and ant-proof composite nylon materials (by mass)

[0050]

[0051]

[0052] Preparation Example 1

[0053] A method for preparing a nylon protective layer 6, wherein the raw materials are accurately weighed according to Table 1, and the preparation method comprises the following steps:

[0054] 1. Preparation of the amino acid grafted nylon resin:

[0055] (1) First, 10 g of nylon 6 resin was immersed in 500 mL of 0.4 mol / L NH2O·HCl aqueous solution, and the pH was adjusted to 8 with NaOH solution. The mixture was kept at 80°C for 5 h under constant temperature and oscillation. After the reaction was completed, the modified nylon resin was obtained by drying.

[0056] (2) 2 g of modified nylon resin was added to 200 mL of deionized water, followed by the addition of 1.5 g of EDC (1-ethyl-(3-dimethylaminopropyl)carbodiimide), 2.2 g of NHS (N-hydroxysuccinimide) and 4 g of L-phenylalanine. The mixture was reacted at 30 °C for 24 h. After the reaction, the reaction product was dialyzed for 2 days using a dialysis bag with a molecular weight cutoff of 5000 to remove unreacted amino acids. The deionized water was replaced every 12 h. After dialysis, the amino acid-grafted nylon resin was obtained by drying.

[0057] 2. The preparation of the layered double hydroxide comprises:

[0058] (1) 99% chlorantraniliprole and 98% piperine were respectively placed in methanol and stirred at 65°C for 3 hours, cooled to room temperature, and vacuum-dried to obtain a rodent and ant repellent.

[0059] (2) The magnesium aluminum hydrotalcite powder was heated to 500°C at a rate of 5°C / min and calcined for 3 hours, and then cooled to obtain a layered hydroxide.

[0060] (3) The rat-ant repellent prepared in step (1) was mixed with NaOH in a mass ratio of 1:2, and then layered hydroxide was added, and the mixture was reacted at 75° C. for 24 h under nitrogen protection. After the reaction was completed, the mixture was dried to obtain a rat-ant repellent layered double metal hydroxide.

[0061] 3. Add amino acid grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat and ant-proof layered double metal hydroxide, lubricant, and antioxidant into a twin-screw extruder, melt blend at 180°C for 15 minutes at a speed of 400 rpm, extruded into granules, and then melted and injection-molded onto the outer surface of the high-density PE layer 5 using an injection molding machine, and cooled to form a nylon protective layer 6.

[0062] In this preparation example, the lubricant is liquid paraffin; and the antioxidant is 2,6-di-tert-butyl-4-methylphenol.

[0063] Preparation Example 2

[0064] A method for preparing a nylon protective layer 6, wherein the raw materials are accurately weighed according to Table 1, and the preparation method comprises the following steps:

[0065] 1. Preparation of the amino acid grafted nylon resin:

[0066] (1) First, 10 g of nylon 6 resin was immersed in 500 mL of 0.4 mol / L NH2O·HCl aqueous solution, and the pH was adjusted to 7 with NaOH solution. The mixture was kept in a constant temperature of 85°C for 4 h and dried after the reaction to obtain the modified nylon resin.

[0067] (2) 2 g of modified nylon resin was added to 200 mL of deionized water, followed by the addition of 1.5 g of EDC (1-ethyl-(3-dimethylaminopropyl)carbodiimide), 2.2 g of NHS (N-hydroxysuccinimide), and 2 g of L-phenylalanine. The mixture was reacted at 25 °C for 26 h. After the reaction, the reaction product was dialyzed for 2 days using a dialysis bag with a molecular weight cutoff of 5000 to remove unreacted amino acids. The deionized water was replaced every 12 h. After dialysis, the amino acid-grafted nylon resin was obtained by drying.

[0068] 2. The preparation of the layered double hydroxide comprises:

[0069] (1) 99% chlorantraniliprole and 98% piperine were respectively placed in methanol and stirred at 65°C for 3 hours, cooled to room temperature, and vacuum-dried to prepare a rodent and ant repellent. The mass ratio of the 99% chlorantraniliprole to the 98% piperine was 1:1.

[0070] (2) The magnesium aluminum hydrotalcite powder was heated to 450°C at a rate of 5°C / min and calcined for 4 h, and then cooled to obtain a layered hydroxide.

[0071] (3) The rat-ant repellent prepared in step (1) is mixed with NaOH in a mass ratio of 1:3, and then layered hydroxide is added, and the mixture is reacted at 80° C. for 20 h under nitrogen protection. After the reaction is completed, the mixture is dried to obtain a rat-ant repellent layered double metal hydroxide.

[0072] 3. Add amino acid-grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat-ant-resistant layered double hydroxide, lubricant, and antioxidant to a twin-screw extruder, melt-blend at 190°C for 20 minutes at 300 rpm, extrude into pellets, remelt, and then injection mold the pellets onto the outer surface of high-density PE layer 5 using an injection molding machine. Cool and form nylon protective layer 6. In this preparation example, the lubricant is sodium stearyl fumarate, and the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

[0073] Preparation Example 3

[0074] A method for preparing a nylon protective layer 6, wherein the raw materials are accurately weighed according to Table 1, and the preparation method comprises the following steps:

[0075] 1. Preparation of the amino acid grafted nylon resin:

[0076] (1) First, 10 g of nylon 6 resin was immersed in 500 mL of 0.4 mol / L NH2O·HCl aqueous solution, and the pH was adjusted to 9 with NaOH solution. The mixture was kept at 75°C for 6 h under constant temperature and oscillation. After the reaction was completed, the modified nylon resin was obtained by drying.

[0077] (2) 2 g of modified nylon resin was added to 200 mL of deionized water, followed by the addition of 1.5 g of EDC (1-ethyl-(3-dimethylaminopropyl)carbodiimide), 2.2 g of NHS (N-hydroxysuccinimide) and 4 g of L-phenylalanine. The mixture was reacted at 35 °C for 22 h. After the reaction, the reaction product was dialyzed for 2 days using a dialysis bag with a molecular weight cutoff of 5000 to remove unreacted amino acids. The deionized water was replaced every 12 h. After dialysis, the amino acid-grafted nylon resin was obtained by drying.

[0078] 2. The preparation of the layered double hydroxide comprises:

[0079] (1) 99% chlorantraniliprole and 98% piperine were respectively placed in methanol and stirred at 65°C for 3 hours, cooled to room temperature, and vacuum-dried to prepare a rodent and ant repellent. The mass ratio of the 99% chlorantraniliprole to the 98% piperine was 3:1.

[0080] (2) The magnesium aluminum hydrotalcite powder was heated to 550°C at a rate of 5°C / min and calcined for 2 h, and then cooled to obtain a layered hydroxide.

[0081] (3) The rat-ant repellent prepared in step (1) was mixed with NaOH in a mass ratio of 1:7, and then layered hydroxide was added, and the mixture was reacted at 70° C. for 28 h under nitrogen protection. After the reaction was completed, the mixture was dried to obtain a rat-ant repellent layered double metal hydroxide.

[0082] 3. Add amino acid grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat and ant-proof layered double metal hydroxide, lubricant, and antioxidant into a twin-screw extruder, melt blend at 170°C for 10 minutes at a speed of 500 rpm, extruded into granules, and then melted and injection-molded onto the outer surface of the high-density PE layer 5 using an injection molding machine, and cooled to form a nylon protective layer 6.

[0083] In this preparation example, the lubricant is polyethylene wax; and the antioxidant is 2,6-di-tert-butyl-4-methylphenol.

[0084] Comparative Example 1

[0085] The difference between Comparative Example 1 and Preparation Example 1 is that the formula of the rat- and ant-proof composite nylon material is different, and the other aspects are the same.

[0086] The formula of the rat- and ant-proof composite nylon material is shown in Table 1.

[0087] Comparative Example 2

[0088] The difference between Comparative Example 2 and Preparation Example 1 is that the formula of the rat- and ant-proof composite nylon material is different, and the other aspects are the same.

[0089] The formula of the rat- and ant-proof composite nylon material is shown in Table 1.

[0090] Comparative Example 3

[0091] The difference between Comparative Example 3 and Preparation Example 1 is that an equal amount of nylon 6 resin is used instead of the modified nylon resin, and all other conditions are the same.

[0092] Comparative Example 4

[0093] The difference between Comparative Example 4 and Preparation Example is that an equal amount of magnesium-aluminum hydrotalcite powder is used to replace the rat-ant-proof layered double metal hydroxide, and all other conditions are the same.

[0094] Comparative Example 5

[0095] The difference between Comparative Example 5 and Preparation Example is that an equal amount of rat and ant repellent is used to replace the rat and ant repellent layered double metal hydroxide, and all other conditions are the same.

[0096] The rat and ant repellent is commercially available synthetic capsaicin (n-nonanoic acid vanillamide).

[0097] Test Example 1

[0098] The rat-ant-proof composite nylon materials prepared in Preparation Examples 1-3 and Comparative Examples 1-5 were tested for tensile strength, wear resistance, and high temperature resistance. Specific test indicators are as follows:

[0099] 1. Tensile strength: GB / T 1040.1-2018 Determination of tensile properties of plastics.

[0100] 2. Wear resistance: ASTM D3884 wear resistance test method, testing the wear amount after 5000 revolutions of friction.

[0101] 3. High temperature resistance: ISO 75-2 Determination of deflection temperature of plastics under load.

[0102] Table 2 Performance test results of different anti-rat and ant composite nylon materials

[0103]

[0104] The higher the tensile strength, the less likely the nylon material is to break when subjected to a tensile force. As shown in Table 2, the tensile strength of the nylon materials prepared in Examples 1-3 is much higher than that in Comparative Examples 1-5, and the friction loss is all below 0.4, indicating that the nylon material prepared in the present invention has good mechanical properties and durability.

[0105] The load deformation temperature of the nylon materials prepared in Examples 1-3 is generally above 320°C, indicating that the nylon materials prepared in the present invention have good high temperature resistance. This is because the amino acid-modified nylon resin improves the mechanical strength of the composite material, making it less susceptible to damage when bitten, thereby extending its service life. At the same time, the aromatic structure of L-phenylalanine has high thermal stability, which increases the heat deformation temperature of the material.

[0106] Test Example 2

[0107] The busbars made of the rat- and ant-proof composite nylon materials of Preparation Examples 1-3 and Comparative Examples 1-5 were subjected to rat- and ant-proof tests respectively:

[0108] The busbar is tested according to Part 9, Termite Test, and Part 10, Rat Gnawing Test in JB / T 10696.10-2011 Test Methods for Mechanical and Physical and Chemical Properties of Wires and Cables. The judgment criteria are shown in Table 3 below.

[0109] Table 3 Cable Anti-rat and Ant Test Judgment Standards

[0110]

[0111] Table 4 Test results of rat and ant resistance performance of different busbars

[0112] Group Termite infestation Rat gnawing Conductivity (%) Example 1 1 significant 62.3 Example 2 1 significant 60.1 Example 3 2 significant 61.5 Comparative Example 1 2 significant 60.6 Comparative Example 2 3 generally 56.3 Comparative Example 3 3 generally 58.9 Comparative Example 4 4 Unqualified 55.7 Comparative Example 5 2 generally 57.0

[0113] As shown in Table 4, the busbar of the present invention can effectively prevent termite infestation and rat gnawing, indicating that the busbar of the present invention has good resistance to termites and rats. The electrical conductivity of the busbar is then tested. Although the electrical conductivity of Example 1 is higher than that of Comparative Examples 1-5, the difference in conductivity is relatively small. This is because when the nylon sheath is bitten through, the metal sheath and high-density PE layer are still protected from termites and rats due to the high-strength materials used. This prevents the copper busbar from being damaged, thereby preventing damage and ensuring the normal operation of the power equipment.

[0114] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A rat and ant proof flexible busbar, characterized in that: The flexible busbar comprises a copper wire busbar (1), the outer surface of the copper wire busbar (1) is covered with a high-strength insulation layer (2), the outer surface of the high-strength insulation layer (3) is covered with an XLPE natural moisture-proof layer (3), the outer surface of the XLPE natural moisture-proof layer (3) is covered with a metal wrapping layer (4), the outer surface of the metal wrapping layer (4) is covered with a high-density PE layer (5), and the outer surface of the high-density PE layer (5) is covered with a nylon protective layer (6); the nylon protective layer (6) is made of a rat-proof and ant-proof composite nylon material; The rat-ant-proof composite nylon material comprises, by mass, 60-70 parts of amino acid-grafted nylon resin, 15-20 parts of polyphthalamide, 8-10 parts of aluminum borate whiskers, 5-9 parts of rat-ant-proof layered double hydroxide, 1-2 parts of lubricant, and 1-2 parts of antioxidant; The preparation of the amino acid grafted nylon resin comprises: S1. Immerse the nylon resin in an aqueous solution of NH2O·HCl and adjust the pH to 7-9. Shake the mixture at a constant temperature of 75-85°C for 4-6 hours. After the reaction is complete, dry the mixture to obtain a modified nylon resin. S2. The modified nylon resin was added to water, and then a crosslinking agent and L-phenylalanine were added, and the reaction was carried out at 25-35 ° C for 22-26h to obtain an amino acid grafted nylon resin; The preparation of the rat- and ant-proof layered double metal hydroxide comprises: (1) Chlorantraniliprole and piperine are placed in an organic solvent and stirred at 60-70°C for 1-5 hours, cooled to room temperature, and vacuum dried to obtain a rodent and ant repellent; (2) calcining magnesium aluminum hydrotalcite powder at 450-550°C for 2-4 hours and cooling to obtain layered hydroxide; (3) The rat-ant repellent prepared in step (1) is mixed with NaOH in a mass ratio of 1:(3-7), and then layered hydroxide is added. The mixture is reacted at 70-80° C. for 20-28 hours under protective gas. After the reaction is completed, the mixture is dried to obtain a rat-ant repellent layered double metal hydroxide.

2. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The rat-ant-proof composite nylon material comprises, by mass, 65 parts of amino acid-grafted nylon resin, 17 parts of polyphthalamide, 9 parts of aluminum borate whiskers, 7 parts of rat-ant-proof layered double metal hydroxide, 1.5 parts of lubricant, and 1.5 parts of antioxidant.

3. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The mass ratio of the chlorantraniliprole to piperine is (1-3):1; the purity of the chlorantraniliprole is 99%, and the purity of the piperine is 98%.

4. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The lubricant is at least one of liquid paraffin, polyethylene wax, and sodium stearyl fumarate.

5. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The antioxidant is a hindered phenol antioxidant.

6. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The material of the XLPE natural moisture-proof layer is cross-linked polyethylene.

7. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The material of the metal cladding layer is aviation alloy aluminum.

8. The rat-proof and ant-proof flexible busbar according to claim 1, characterized in that: The material of the high-density PE layer is high-density polyethylene.

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