A flexible BV electrical wire for home decoration and its preparation method

Abstract

This application provides a flexible BV electrical wire for home decoration and its manufacturing method. The flexible BV electrical wire includes a core, a wrapping layer, and an insulation layer. The core is composed of multiple conductors twisted together. By setting the conductor material to an alloy composed of copper, zinc, aluminum, and silver, using polyurethane-modified polyvinyl chloride as the insulation layer, and using polyester film as the wrapping layer, the conductor's own ductility is significantly improved. The twisting process does not increase the core's hardness. The insulation layer itself has high flexibility. After being made into a home decoration cable, the bending radius is small during wiring, making it easy for users to run the cable in confined spaces and improving the user experience. Combined with the manufacturing method provided in this application, it has the advantages of simple operation, low implementation cost, improved user experience, and easy promotion and implementation.

Description

Technical Field

[0001] This application belongs to the field of home decoration cable manufacturing technology, specifically relating to a flexible home decoration BV wire and its preparation method. Background Technology

[0002] In the existing technology, BV wire is the most commonly used ordinary insulated wire and household wiring in people's daily lives. Especially in the process of home decoration, BV wire runs through almost the entire house layout. It has certain moisture-proof and mildew-proof properties, and has a long service life, making it one of the first choices for household wiring.

[0003] In existing technology, conventional household BV cables typically consist of a conductor layer and an insulation layer. The conductor is usually a pure copper Class 1 conductor, which is typically prepared by a single annealing process. The insulation layer is usually made of 70-degree polyvinyl chloride material, with a hardness of 95-98A. Cables made by combining these two materials have high overall hardness and low flexibility, making it difficult to peel off the insulation layer to expose the conductor core. The bending radius of the cable is large during home wiring. In home decoration, if wiring is carried out in a confined space, the existing BV cables cannot meet the user's needs, resulting in a poor user experience. Therefore, there is an urgent need for improvement. Summary of the Invention

[0004] In order to solve the technical problem that in the prior art, the conventional household BV wire conductor is a pure copper Class 1 conductor and the insulation layer is 70-degree polyvinyl chloride material, and the BV household cable made of the above two materials has high hardness and low flexibility, making it difficult to peel off the insulation layer to expose the conductor core, and the bending radius is large during the wiring process, which is inconvenient for wiring and cannot meet the user's needs, this application proposes a flexible household BV wire.

[0005] In order to solve the technical problems raised in this application, this application also provides a method for preparing flexible BV electrical wire for home decoration.

[0006] This application adopts the following solution: a flexible BV electrical wire for home decoration, including a wire core, a wrapping layer covering the wire core, and an insulation layer covering the wrapping layer. The wire core is made of multiple conductors twisted together. The conductors are made of an alloy composed of copper, zinc, aluminum, and silver. The insulation layer is made of polyurethane-modified polyvinyl chloride. The wrapping layer is made of polyester film.

[0007] Furthermore, by mass fraction, the conductor is composed of the following components: 90.1-92.5% copper, 1.3-2.4% zinc, 3.1-6.5% aluminum, and 2.1-2.5% silver.

[0008] Furthermore, the method for preparing the conductor includes the following steps:

[0009] Step 101. Electrolytic copper, zinc, aluminum and silver are sequentially added to an induction furnace and melted at 1350℃ to obtain a liquid alloy.

[0010] Step 102. Pour the liquid alloy prepared in step 101 into a sand core mold and cool it. After cooling, a conductor alloy blank is prepared.

[0011] Step 103. Transfer the conductor alloy billet prepared in step 102 to a TJ350 Confomm radial continuous extrusion press for multiple extrusions. The deformation of the billet after the first extrusion is 33-45%, and the deformation of the billet after the second extrusion is 8-12%. The conductor is obtained after the second extrusion.

[0012] Furthermore, during the secondary extrusion process in step 103, a secondary furnace annealing is performed simultaneously. The primary annealing temperature is 500-550℃, and the secondary annealing temperature is 450-500℃. After the secondary annealing is completed, the conductor is immersed in an antioxidant for 36-72 hours to obtain the conductor.

[0013] By employing a continuous drawing and annealing process during the alloy conductor production process, and performing secondary furnace annealing after the alloy conductor reaches a specific deformation, along with immersion in an antioxidant, the elongation of the conductor after secondary annealing can be effectively guaranteed to be within the range of 25-35%, improving the conductor's flexibility and gloss, and reducing the likelihood of oxidation and blackening. The antioxidant is a mixture of methyltriazole and ascorbic acid in a 1:1 mass ratio, which effectively prevents oxidation of the alloy conductor after annealing, thus preventing a reduction in the quality of the alloy conductor.

[0014] An alloy is prepared by combining copper, zinc, aluminum, and silver, which increases the softening temperature. However, due to the solid solution strengthening effect of silver in the alloy, the hardness of the alloy conductor can be reduced and its flexibility increased after secondary annealing. The stranding process of the alloy conductor does not increase the hardness of the wire core. Combined with the insulation layer made of polyurethane-modified polyvinyl chloride, the finished home decoration cable has a small bending radius during the wiring process, which makes it easier for users to run the cable in a confined space and improves the user experience. With the preparation method provided in this application, it has the advantages of simple operation, low implementation cost, improved user experience, and easy promotion and implementation.

[0015] Furthermore, by weight, the insulating layer is composed of the following components: 46-66 parts of polyvinyl chloride, 8-12 parts of polyurethane resin, 12-16 parts of styrene-butadiene rubber, 4-7 parts of nanofiller, 5-8 parts of insulating filler, and 3-5 parts of dispersant, wherein the nanofiller is nano-calcium carbonate and the insulating filler is α-alumina.

[0016] Furthermore, the nanofillers and insulating fillers undergo surface modification, which includes the following steps:

[0017] Step 201. Take one-third of the total weight of the nanofiller and put it into a magnetically stirred tank. Then, add titanate coupling agent dropwise until the height of the titanate coupling agent is 3-5 times the height of the nanofiller. Stop adding titanate coupling agent.

[0018] Step 202. The remaining nanofiller and insulating filler are sequentially added into a high-speed disperser and dispersed at room temperature and 2000 rpm for 30 min to obtain homogenized filler.

[0019] Step 203. The homogenized filler prepared in step 202 is put into a magnetically stirred tank and surface modified for 1-3 hours under the conditions of 70°C and 2200 rpm in a water bath. After being filtered and dried, a mixture of nanofiller and insulating filler is obtained.

[0020] Furthermore, in step 202, the homogenized filler is added to the magnetically stirred tank at a flow rate of 10-50 g / min.

[0021] Furthermore, the preparation method of the insulating layer includes the following steps: polyvinyl chloride, polyurethane resin, styrene-butadiene rubber, nanofiller, insulating filler, and dispersant are sequentially added to a high-speed disperser and dispersed for 20 minutes at 40°C and 1200 rpm. After dispersion, the mixture is transferred to a twin-screw extruder, and after sequential mixing, extrusion, cooling, and granulation, the insulating layer material is obtained.

[0022] Furthermore, the temperature of the twin-screw extruder is 95℃ in the melting section, 102℃ in the mixing section, 115℃ in the venting section, 92℃ in the extrusion section, and -0.01 MPa in the venting pressure.

[0023] By using blending modification, after the polyvinyl chloride chain segments break, polyurethane flexible groups are grafted at the break points, which improves the flexibility of the polyurethane insulation layer. To compensate for the reduction in flame retardancy and insulation after polyurethane modification, surface-modified insulating fillers and nanofillers are added. On the one hand, the integrity of the insulation layer can still be maintained to avoid cracking of the insulation layer. On the other hand, its blending performance is improved, while ensuring the flexibility, flame retardancy and insulation of the insulation layer.

[0024] To address the technical problems raised in this application, this application also provides a method for preparing flexible BV electrical wire for home decoration, comprising the following steps:

[0025] Step 301. After arranging the bundled alloy conductors in a 1+9 regular pattern, use a cage stranding machine to strand them into a conductor.

[0026] Step 302. Wrap the polyester film around the outer periphery of the conductor prepared in step 301 using a wrapping machine;

[0027] Step 303. The insulating material is extruded onto the outer periphery of the polyester film wrapped in step 302 by extrusion tube to obtain a flexible BV electrical wire for home decoration.

[0028] Compared with the prior art, this application has the following beneficial effects:

[0029] This application provides a flexible BV electrical wire for home decoration and its manufacturing method. The flexible BV electrical wire includes a core, a wrapping layer, and an insulation layer. The core is composed of multiple conductors twisted together. By setting the conductor material to an alloy composed of copper, zinc, aluminum, and silver, using polyurethane-modified polyvinyl chloride as the insulation layer, and using polyester film as the wrapping layer, the conductor's own ductility is significantly improved. The twisting process does not increase the core's hardness. The insulation layer itself has high flexibility. After being made into a home decoration cable, the bending radius is small during wiring, making it easy for users to run the cable in confined spaces and improving the user experience. Combined with the manufacturing method provided in this application, it has the advantages of simple operation, low implementation cost, improved user experience, and easy promotion and implementation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0031] Figure 1 This is a cross-sectional schematic diagram of a flexible BV electrical wire for home decoration according to this application; Detailed Implementation

[0032] Combination such as Figure 1 As shown, to further illustrate this technical solution, a flexible BV electrical wire for home decoration includes a wire core 1, a wrapping layer 2 covering the wire core 1, and an insulation layer 3 covering the wrapping layer 2. The wire core 1 is formed by stranding multiple conductors 4, and the material of the conductors 4 is an alloy composed of copper, zinc, aluminum and silver. The material of the insulation layer 3 is polyurethane modified polyvinyl chloride, and the material of the wrapping layer 2 is polyester film.

[0033] This application provides a flexible BV electrical wire for home decoration and its manufacturing method. The flexible BV electrical wire includes a core, a wrapping layer, and an insulation layer. The core is composed of multiple conductors twisted together. By setting the conductor material to an alloy composed of copper, zinc, aluminum, and silver, using polyurethane-modified polyvinyl chloride as the insulation layer, and using polyester film as the wrapping layer, the conductor's own ductility is significantly improved. The twisting process does not increase the core's hardness. The insulation layer itself has high flexibility. After being made into a home decoration cable, the bending radius is small during wiring, making it easy for users to run the cable in confined spaces and improving the user experience. Combined with the manufacturing method provided in this application, it has the advantages of simple operation, low implementation cost, improved user experience, and easy promotion and implementation.

[0034] Example 1

[0035] (1) Prepare the conductor according to the composition table shown in Table 1: including the following steps:

[0036] Step 101. Electrolytic copper, zinc, aluminum and silver are sequentially added to an induction furnace and melted at 1350℃ to obtain a liquid alloy.

[0037] Step 102. Pour the liquid alloy prepared in step 101 into a sand core mold and cool it. After cooling, a conductor alloy blank is prepared.

[0038] Step 103. The conductor alloy billet prepared in step 102 is transferred to a TJ350 Confomm radial continuous extrusion press for multiple extrusions. The deformation of the billet after the first extrusion is 38%, and the deformation of the billet after the second extrusion is 9%. During the second extrusion, a second furnace annealing is performed simultaneously. The first annealing temperature is 510℃, and the second annealing temperature is 456℃. After the second annealing is completed, the billet is immersed in an antioxidant for 38 hours to obtain the conductor.

[0039] (2) Prepare the insulating layer material according to the composition table shown in Table 1: including the following steps:

[0040] Polyvinyl chloride, polyurethane resin, styrene-butadiene rubber, nanofiller, insulating filler, and dispersant are sequentially added to a high-speed disperser and dispersed at 40°C and 1200 rpm for 20 minutes. After dispersion, the mixture is transferred to a twin-screw extruder, and after sequential mixing, extrusion, cooling, and granulation, the insulating layer material is obtained.

[0041] The twin-screw extruder has a melting zone temperature of 95℃, a mixing zone temperature of 102℃, a venting zone temperature of 115℃, an extrusion zone temperature of 92℃, and a venting pressure of -0.01 MPa.

[0042] Among them, the nanofillers and insulating fillers undergo surface modification, which includes the following steps:

[0043] Step 201. Take one-third of the total weight of the nanofiller and put it into a magnetically stirred tank. Then, add titanate coupling agent dropwise until the height of the titanate coupling agent is three times the height of the nanofiller. Stop adding titanate coupling agent.

[0044] Step 202. The remaining nanofiller and insulating filler are sequentially added into a high-speed disperser and dispersed at room temperature and 2000 rpm for 30 min to obtain homogenized filler.

[0045] Step 203. The homogenized filler prepared in step 202 is put into a magnetically stirred tank and surface modified for 3 hours under the conditions of 70°C and 2200 rpm in a water bath. After being filtered and dried, a mixture of nanofiller and insulating filler is obtained.

[0046] (3) A method for preparing flexible BV electrical wires for home decoration, comprising the following steps:

[0047] Step 301. After arranging the bundled alloy conductors in a 1+9 regular pattern, use a cage stranding machine to strand them into a conductor.

[0048] Step 302. Wrap the polyester film around the outer periphery of the conductor prepared in step 301 using a wrapping machine;

[0049] Step 303. The insulating material is extruded onto the outer periphery of the polyester film wrapped in step 302 by extrusion tube to obtain a flexible BV electrical wire for home decoration.

[0050] Example 2

[0051] (1) Prepare the conductor according to the composition table shown in Table 1: including the following steps:

[0052] Step 101. Electrolytic copper, zinc, aluminum and silver are sequentially added to an induction furnace and melted at 1350℃ to obtain a liquid alloy.

[0053] Step 102. Pour the liquid alloy prepared in step 101 into a sand core mold and cool it. After cooling, a conductor alloy blank is prepared.

[0054] Step 103. The conductor alloy billet prepared in step 102 is transferred to a TJ350 Confomm radial continuous extrusion press for multiple extrusions. The deformation of the billet after the first extrusion is 38%, and the deformation of the billet after the second extrusion is 9%. During the second extrusion, a second furnace annealing is performed simultaneously. The first annealing temperature is 525℃, and the second annealing temperature is 480℃. After the second annealing is completed, the billet is immersed in an antioxidant for 48 hours to obtain the conductor.

[0055] (2) Prepare the insulating layer material according to the composition table shown in Table 1: including the following steps:

[0056] Polyvinyl chloride, polyurethane resin, styrene-butadiene rubber, nanofiller, insulating filler, and dispersant are sequentially added to a high-speed disperser and dispersed at 40°C and 1200 rpm for 20 minutes. After dispersion, the mixture is transferred to a twin-screw extruder, and after sequential mixing, extrusion, cooling, and granulation, the insulating layer material is obtained.

[0057] The twin-screw extruder has a melting zone temperature of 95℃, a mixing zone temperature of 102℃, a venting zone temperature of 115℃, an extrusion zone temperature of 92℃, and a venting pressure of -0.01 MPa.

[0058] Among them, the nanofillers and insulating fillers undergo surface modification, which includes the following steps:

[0059] Step 201. Take one-third of the total weight of the nanofiller and put it into a magnetically stirred tank. Then, add titanate coupling agent dropwise until the height of the titanate coupling agent is four times the height of the nanofiller. Stop adding titanate coupling agent.

[0060] Step 202. The remaining nanofiller and insulating filler are sequentially added into a high-speed disperser and dispersed at room temperature and 2000 rpm for 30 min to obtain homogenized filler.

[0061] Step 203. The homogenized filler prepared in step 202 is put into a magnetically stirred tank and surface modified for 2 hours under the conditions of 70°C and 2200 rpm in a water bath. After being filtered and dried, a mixture of nanofiller and insulating filler is obtained.

[0062] (3) A method for preparing flexible BV electrical wires for home decoration, comprising the following steps:

[0063] Step 301. After arranging the bundled alloy conductors in a 1+9 regular pattern, use a cage stranding machine to strand them into a conductor.

[0064] Step 302. Wrap the polyester film around the outer periphery of the conductor prepared in step 301 using a wrapping machine;

[0065] Step 303. The insulating material is extruded onto the outer periphery of the polyester film wrapped in step 302 by extrusion tube to obtain a flexible BV electrical wire for home decoration.

[0066] Example 3

[0067] (1) Prepare the conductor according to the composition table shown in Table 1: including the following steps:

[0068] Step 101. Electrolytic copper, zinc, aluminum and silver are sequentially added to an induction furnace and melted at 1350℃ to obtain a liquid alloy.

[0069] Step 102. Pour the liquid alloy prepared in step 101 into a sand core mold and cool it. After cooling, a conductor alloy blank is prepared.

[0070] Step 103. Transfer the conductor alloy billet prepared in step 102 to a TJ350 Confomm radial continuous extrusion press for multiple extrusions. The deformation of the billet after the first extrusion is 33-45%, and the deformation of the billet after the second extrusion is 8-12%. During the second extrusion, a second furnace annealing is performed simultaneously. The first annealing temperature is 500-550℃, and the second annealing temperature is 450-500℃. After the second annealing is completed, the billet is immersed in an antioxidant for 36-72 hours to obtain the conductor.

[0071] (2) Prepare the insulating layer material according to the composition table shown in Table 1: including the following steps:

[0072] Polyvinyl chloride, polyurethane resin, styrene-butadiene rubber, nanofiller, insulating filler, and dispersant are sequentially added to a high-speed disperser and dispersed at 40°C and 1200 rpm for 20 minutes. After dispersion, the mixture is transferred to a twin-screw extruder, and after sequential mixing, extrusion, cooling, and granulation, the insulating layer material is obtained.

[0073] The twin-screw extruder has a melting zone temperature of 95℃, a mixing zone temperature of 102℃, a venting zone temperature of 115℃, an extrusion zone temperature of 92℃, and a venting pressure of -0.01 MPa.

[0074] Among them, the nanofillers and insulating fillers undergo surface modification, which includes the following steps:

[0075] Step 201. Take one-third of the total weight of the nanofiller and put it into a magnetically stirred tank. Then, add titanate coupling agent dropwise until the height of the titanate coupling agent is 5 times the height of the nanofiller. Stop adding titanate coupling agent.

[0076] Step 202. The remaining nanofiller and insulating filler are sequentially added into a high-speed disperser and dispersed at room temperature and 2000 rpm for 30 min to obtain homogenized filler.

[0077] Step 203. The homogenized filler prepared in step 202 is put into a magnetically stirred tank and surface modified for 1 hour under the conditions of 70°C and 2200 rpm in a water bath. After being filtered and dried, a mixture of nanofiller and insulating filler is obtained.

[0078] (3) A method for preparing flexible BV electrical wires for home decoration, comprising the following steps:

[0079] Step 301. After arranging the bundled alloy conductors in a 1+9 regular pattern, use a cage stranding machine to strand them into a conductor.

[0080] Step 302. Wrap the polyester film around the outer periphery of the conductor prepared in step 301 using a wrapping machine;

[0081] Step 303. The insulating material is extruded onto the outer periphery of the polyester film wrapped in step 302 by extrusion tube to obtain a flexible BV electrical wire for home decoration.

[0082] Comparative Example 1

[0083] The material of the insulation layer in Example 3 was replaced with commercially available 70°C polyvinyl chloride.

[0084] Comparative Example 2

[0085] The alloy conductor in Example 3 was replaced with a pure copper type 1 copper conductor.

[0086] Comparative Example 3

[0087] In the alloy conductor preparation process of Example 3, the secondary furnace annealing was replaced with primary annealing, and the annealing temperature was 550°C.

[0088] Table 1. Composition of each component in Examples 1-3

[0089]

[0090] The conductor test specimens, insulation test specimens, and cable samples prepared in Examples 1-3 and Comparative Examples 1-3 were tested according to GB / T 4074.3-2008. The elongation at break in GB / T 4074.3-2008 was used as the standard for evaluating the flexibility of the cable. The test results are shown in the table below:

[0091] Table 2 Test Results of Examples 1-3 and Comparative Examples 1-3

[0092]

[0093]

[0094] As shown in Table 2, the test results indicate that in Comparative Example 1, the insulation material was replaced with commercially available 70°C polyvinyl chloride (PVC). PVC has high hardness, resulting in a cable with high overall hardness and low flexibility, making it unsuitable for wiring in confined spaces. In Comparative Example 2, the alloy conductor was replaced with pure copper (Class 1). The alloy conductor, through the combination of copper, zinc, aluminum, and silver, increases the alloy's softening temperature. However, due to the solid solution strengthening effect of silver in the alloy, combined with the softening effect of aluminum and zinc, the alloy conductor's flexibility is effectively improved compared to pure copper. In Comparative Example 3, the secondary furnace annealing was replaced with primary annealing at a temperature of 550°C, which is the same as the annealing process for existing and pure copper conductors. Secondary annealing significantly improves the alloy conductor's flexibility and effectively reduces its hardness, making the cable easier for users to run in confined spaces.

[0095] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flexible BV electrical wire for home decoration, characterized in that, It includes a wire core (1), a wrapping layer (2) covering the wire core (1), and an insulation layer (3) covering the wrapping layer (2). The wire core (1) is made of multiple conductors (4) twisted together. The conductors (4) are made of an alloy composed of copper, zinc, aluminum and silver. The insulation layer (3) is made of polyurethane modified polyvinyl chloride. The wrapping layer (2) is made of polyester film. The conductor (4) is composed of the following components by mass fraction: 90.1-92.5% copper, 1.3-2.4% zinc, 3.1-6.5% aluminum, and 2.1-2.5% silver; The insulating layer (3) is composed of the following components by weight: 46-66 parts of polyvinyl chloride, 8-12 parts of polyurethane resin, 12-16 parts of styrene-butadiene rubber, 4-7 parts of nanofiller, 5-8 parts of insulating filler, and 3-5 parts of dispersant, wherein the nanofiller is nano-calcium carbonate and the insulating filler is α-alumina.

2. The flexible BV electrical wire for home decoration according to claim 1, characterized in that, The method for preparing the conductor (4) includes the following steps: Step 101. Electrolytic copper, zinc, aluminum and silver are sequentially added to an induction furnace and melted at 1350℃ to obtain a liquid alloy. Step 102. Pour the liquid alloy prepared in step 101 into a sand core mold and cool it. After cooling, a conductor alloy blank is prepared. Step 103. Transfer the conductor alloy billet prepared in step 102 to a TJ350Confomm radial continuous extrusion press for multiple extrusions. The deformation of the billet after the first extrusion is 33-45%, and the deformation of the billet after the second extrusion is 8-12%. The conductor (4) is obtained after the second extrusion.

3. The flexible BV electrical wire for home decoration according to claim 2, characterized in that, In step 103, during the secondary extrusion process, a secondary furnace annealing is carried out simultaneously. The primary annealing temperature is 500-550℃, and the secondary annealing temperature is 450-500℃. After the secondary annealing is completed, the conductor (4) is immersed in an antioxidant for 36-72 hours.

4. The flexible BV electrical wire for home decoration according to claim 1, characterized in that, Nanofillers and insulating fillers undergo surface modification, which includes the following steps: Step 201. Take one-third of the total weight of the nanofiller and put it into a magnetically stirred tank. Then, add titanate coupling agent dropwise until the height of the titanate coupling agent is 3-5 times the height of the nanofiller. Stop adding titanate coupling agent. Step 202. Add the remaining nanofiller and insulating filler to the high-speed dispersant in sequence, and disperse them at room temperature and 2000 rpm for 30 min to obtain homogenized filler; Step 203. The homogenized filler prepared in step 202 is put into a magnetically stirred tank and surface modified for 1-3 hours under the conditions of 70°C and 2200 rpm in a water bath. After being filtered and dried, a mixture of nanofiller and insulating filler is obtained.

5. A flexible BV electrical wire for home decoration according to claim 4, characterized in that, In step 202, the homogenized filler is added to the magnetically stirred tank at a flow rate of 10-50 g / min.

6. The flexible BV electrical wire for home decoration according to claim 1, characterized in that, The preparation method of the insulating layer (3) includes the following steps: polyvinyl chloride, polyurethane resin, styrene-butadiene rubber, nanofiller, insulating filler and dispersant are sequentially added to a high-speed dispersant and dispersed at 40°C and 1200 rpm for 20 min. After dispersion, the mixture is transferred to a twin-screw extruder, and after sequential mixing, extrusion, cooling and granulation, the insulating layer material is obtained.

7. A flexible BV electrical wire for home decoration according to claim 6, characterized in that, The temperature of the twin-screw extruder is 95℃ in the melting section, 102℃ in the mixing section, 115℃ in the venting section, 92℃ in the extrusion section, and -0.01 MPa in the venting pressure.

8. A method for preparing a flexible BV electrical wire for home decoration according to any one of claims 1-7, characterized in that, Includes the following steps: Step 301. After arranging the bundled alloy conductors in a 1+9 regular pattern, use a cage stranding machine to strand them into a conductor. Step 302. Wrap the polyester film around the outer periphery of the conductor prepared in step 301 using a wrapping machine; Step 303. The insulating material is extruded onto the outer periphery of the polyester film wrapped in step 302 by extrusion tube to obtain a flexible BV electrical wire for home decoration.

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