Preparation method of rat-proof and ant-proof flexible bus

Abstract

The invention discloses a preparation method of a rat-proof and termite-proof flexible bus, and belongs to the technical field of buses. The flexible bus takes a copper wire row as an inner core, the outer surface of the copper wire row is coated with a high-strength insulating layer, the outer surface of the high-strength insulating layer is coated with an XLPE natural damp-proof layer, the outer surface of the XLPE natural damp-proof layer is coated with a metal wrapping layer, the outer surface of the metal wrapping layer is coated with a high-density PE layer, and the outer surface of the high-density PE layer is coated with a high-density PE layer. The outer surface of the high-density PE layer is coated with a nylon protective layer; and the nylon protective layer is made of a rat-proof and termite-proof composite nylon material. Wherein the rat-and-termite-proof composite nylon material comprises amino acid grafted nylon resin, polyphthalamide, aluminum borate whiskers, rat-and-termite-proof layered double hydroxides, a lubricant and an antioxidant, all the components are matched with one another, and the prepared composite nylon material is matched with protective layers such as a metal wrapping layer and the like, so that the invasion of rats and termites can be effectively prevented.

Description

Technical Field

[0001] The 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 and have the function of collecting and distributing electricity. They are usually made of copper or aluminum with high conductivity and have different shapes and structures. Busbars are usually rigid and difficult to bend, which limits their use in applications where space is limited or frequent bending is required. In order to achieve flexible wiring of busbars, special designs such as plug-in bus ducts are generally used to adapt to complex wiring environments. However, such plug-in bus ducts are prone to electromagnetic interference, which increases the complexity of maintenance. In addition, the plug-in boxes and connection points require additional space and are not suitable for applications with limited space. In addition, during use, busbars are easily attacked by pests such as rats and ants, resulting in equipment damage and safety hazards. In order to protect the busbars from being bitten by small animals such as rats and ants, repellents or toxic substances are generally added to drive away or eliminate rats and ants. Although it can prevent the biting of rats and ants, the chemical additives used are likely to affect the environment and the health of users, and the sustained effect is poor.

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

[0004] In view of the defects of the prior art, the present invention designs a method for preparing a rat- and ant-proof flexible busbar. The prepared busbar 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- and ant-proof flexible busbar, the flexible busbar comprising a copper wire busbar (1), the copper wire busbar (1) having an outer surface covered with a high-strength insulation layer (2), the high-strength insulation layer (3) having an outer surface covered with an XLPE natural moisture-proof layer (3), the XLPE natural moisture-proof layer (3) having an outer surface covered with a metal wrapping layer (4), the metal wrapping layer (4) having an outer surface covered with a high-density PE layer (5), the high-density PE layer (5) having an outer surface covered with a nylon protective layer (6); the nylon protective layer (6) being made of a rat- and 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 good 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 layer has excellent moisture-proof properties and can effectively prevent moisture from entering the interior of the power equipment, thereby extending the service life of the equipment. By using the XLPE natural moisture barrier layer, equipment failures caused by a humid environment can be effectively reduced, and the stability and reliability of the equipment can be improved.

[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, and can effectively protect the power equipment from the influence of the external environment, further extending 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 metal hydroxides, 1-2 parts of lubricants, and 1-2 parts of antioxidants.

[0014] In one embodiment, the rat-ant-proof composite nylon material includes, 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 hydroxides, 1.5 parts of lubricants, and 1.5 parts of antioxidants.

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

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

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

[0018] In one embodiment, the preparation of the layered double metal 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 a 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 a layered hydroxide is added, and the mixture is reacted at 70-80° C. for 20-28 hours under a 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 phenolic 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 an inner core, the outer surface of the copper wire busbar is coated with a high-strength insulation layer, the outer surface of the high-strength insulation layer is coated with an XLPE natural moisture-proof layer, the outer surface of the XLPE natural moisture-proof layer is coated with a metal sheathing layer, the material of the metal sheathing layer is aviation high-strength aluminum alloy, which can prevent the gnawing of rats and ants; the outer surface of the metal sheathing layer is coated with a high-density PE layer, the material of which is high-density PE with high hardness, 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 high-density PE layer is coated with a nylon protective layer made of rat-ant-proof composite nylon material on the outer surface of the high-density PE layer. By grafting L-phenylalanine onto the nylon resin through a crosslinking agent to modify the nylon resin, 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 hydroxides, lubricants, antioxidants, etc., thereby improving the thermal deformation temperature and heat resistance of the composite material.

[0031] Furthermore, the rat and ant repellent composed of chlorantraniliprole and piperine is inserted into the layered double metal hydroxide to realize a sustained release function and achieve 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 drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a structural schematic diagram of a rat and ant-proof flexible busbar provided in 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 creative work 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 kind of 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 row 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 bus 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 winding layer 4, the outer surface of the metal winding 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 row 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 winding 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- and ant-proof composite nylon material.

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

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

[0044] 2. Preparation of high-strength insulating layer 2: After polyvinyl chloride (PVC) particles are melted, they are extruded through an extruder and wrapped around the outer surface of the copper wire row 1, and cooled to form a high-strength insulating layer 2 with a thickness of 2 mm.

[0045] 3. Preparation of XLPE natural moisture barrier layer 3: After the cross-linked polyethylene plastic particles are melted, they are extruded through an extruder and wrapped around the outer surface of the high-strength insulation layer 2, and cooled to form an XLPE natural moisture barrier layer 3 with a thickness of 1 mm.

[0046] 4. Prepare the metal wrapping layer 4: Use aviation alloy aluminum wire with a wire diameter of 2 mm to weave on the outer surface of the XLPE natural moisture-proof layer 3 to form a metal wrapping layer 4 with a thickness of 2 mm; the weaving angle is 45°, and the weaving 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 on the outer surface of the metal wrapping layer 4 through a mold using injection molding technology, 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 whisker, rat-ant-proof layered double metal hydroxide, lubricant and antioxidant are mixed and extruded into granules, and then melted and wrapped on the outer surface of high-density PE layer 5 by injection molding by an injection molding machine, and cooled to form a nylon protective layer with a thickness of 1 mm; the specific formula of the rat-ant-proof composite nylon material is shown in Table 1 below.

[0049] Table 1 Formula of rat and ant-proof composite nylon material (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 with constant temperature 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, and then 1.5 g of EDC (1-ethyl-(3-dimethylaminopropyl)carbodiimide), 2.2 g of NHS (N-hydroxysuccinimide) and 4 g of L-phenylalanine were added. 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 metal 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 is heated to 500° C. at a rate of 5° C. / min and calcined for 3 h, and then cooled to obtain a layered hydroxide.

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

[0061] 3. Add amino acid grafted nylon resin, polyphthalamide, aluminum borate whisker, rat and ant resistant layered double metal hydroxide, lubricant and antioxidant into a twin-screw extruder, melt blend at 180° C. for 15 min, with a rotation speed of 400 rpm, extrude into granules, and then melt and then wrap the granules on the outer surface of the high-density PE layer 5 with an injection molding machine, and cool 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 subjected to constant temperature oscillation reaction at 85°C for 4 h. After the reaction was completed, the modified nylon resin was obtained by drying.

[0067] (2) 2 g of modified nylon resin was added to 200 mL of deionized water, and then 1.5 g of EDC (1-ethyl-(3-dimethylaminopropyl)carbodiimide), 2.2 g of NHS (N-hydroxysuccinimide) and 2 g of L-phenylalanine were added. 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 mixture was dried to obtain the amino acid grafted nylon resin.

[0068] 2. The preparation of the layered double metal 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 obtain a rat and ant repellent. The mass ratio of 99% chlorantraniliprole to 98% piperine was 1:1.

[0070] (2) The magnesium aluminum hydrotalcite powder is 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 a 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 whisker, rat-ant-proof layered double metal hydroxide, lubricant, and antioxidant into a twin-screw extruder, melt blend at 190° C. for 20 min, rotate at 300 rpm, extruded into granules, and then melted and then wrapped on the outer surface of the high-density PE layer 5 by injection molding using an injection molding machine, and cooled to form a nylon protective layer 6. In this preparation example, the lubricant is sodium stearyl fumarate; 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 with constant temperature 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, and then 1.5 g of EDC (1-ethyl-(3-dimethylaminopropyl)carbodiimide), 2.2 g of NHS (N-hydroxysuccinimide) and 4 g of L-phenylalanine were added. 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 metal 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 obtain a rat and ant repellent. The mass ratio of 99% chlorantraniliprole to 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 and ant repellent prepared in step (1) is mixed with NaOH in a mass ratio of 1:7, and then a layered hydroxide is added, and the mixture is reacted at 70° C. for 28 h under nitrogen protection. After the reaction is completed, the mixture is dried to obtain a rat and ant repellent layered double metal hydroxide.

[0082] 3. Add amino acid grafted nylon resin, polyphthalamide, aluminum borate whisker, rat and ant resistant layered double metal hydroxide, lubricant and antioxidant into a twin-screw extruder, melt blend at 170°C for 10 minutes, with a rotation speed of 500 rpm, extrude into granules, and then melt and then wrap them around the outer surface of the high-density PE layer 5 with an injection molding machine, and cool 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 to replace the modified nylon resin, and the other contents 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 and ant-proof layered double metal hydroxide, and the other contents 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 the other contents 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. The 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 load deformation temperature of plastics.

[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] Then, the load deformation temperature of the nylon materials obtained in Examples 1-3 is basically above 320°C, indicating that the nylon materials obtained 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 likely to be damaged when bitten, thereby extending the service life; at the same time, the aromatic structure of L-phenylalanine has high thermal stability, which improves the heat deformation temperature of the material.

[0106] Test Example 2

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

[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 Failure 55.7 Comparative Example 5 2 generally 57.0

[0113] It can be seen from Table 4 that the busbar of the present invention can effectively prevent termites from infesting and rats from gnawing, indicating that the busbar of the present invention has good anti-rat and ant properties. Then, by testing the electrical conductivity of the busbar, 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, high-density PE layer and other sheaths are made of high-strength materials to prevent the gnawing of rats and ants, thereby avoiding damage to the copper wire bus and ensuring the normal operation of the power equipment.

[0114] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes 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 bar (1); the outer surface of the copper wire bar (1) is coated with a high-strength insulation layer (2); the outer surface of the high-strength insulation layer (3) is coated with an XLPE natural moisture-proof layer (3); the outer surface of the XLPE natural moisture-proof layer (3) is coated with a metal wrapping layer (4); the outer surface of the metal wrapping layer (4) is coated with a high-density PE layer (5); the outer surface of the high-density PE layer (5) is coated with a nylon protective layer (6); the nylon protective layer (6) is made of rat- and ant-proof composite nylon material.

2. The rat- and ant-proof flexible busbar according to claim 1, characterized in that: 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 metal hydroxides, 1-2 parts of lubricants, and 1-2 parts of antioxidants.

3. The rat- and ant-proof flexible busbar according to claim 2, 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 hydroxides, 1.5 parts of lubricants, and 1.5 parts of antioxidants.

4. The rat- and ant-proof flexible busbar according to claim 2, characterized in that: The preparation of the amino acid grafted nylon resin comprises: S1. Immerse the nylon resin in an aqueous solution of NH2O·HCl, adjust the pH to 7-9, and react at a constant temperature of 75-85°C for 4-6 hours. After the reaction is completed, dry to obtain a modified nylon resin; S2. Add the modified nylon resin into water, then add the cross-linking agent and L-phenylalanine, and react at 25-35°C for 22-26h to obtain the amino acid grafted nylon resin.

5. The rat- and ant-proof flexible busbar according to claim 2, characterized in that: The preparation of the 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) Calcine the LDH powder at 450-550°C for 2-4 hours and cool it to obtain a 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 a layered hydroxide is added, and the mixture is reacted at 70-80° C. for 20-28 hours under a protective gas. After the reaction is completed, the mixture is dried to obtain a rat-ant repellent layered double metal hydroxide.

6. The rat- and ant-proof flexible busbar according to claim 4, characterized in that: The mass ratio of the 99% chlorantraniliprole to the 98% piperine is (1-3):

1.

7. The rat- and ant-proof flexible busbar according to claim 2, characterized in that: The lubricant is at least one of liquid paraffin, polyethylene wax and sodium stearyl fumarate.

8. The rat- and ant-proof flexible busbar according to claim 2, characterized in that: The antioxidant is a hindered phenol antioxidant.

9. The rat- 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.

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

11. The rat- 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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