Special structure data cable insulation core wire and preparation method thereof

Abstract

The invention discloses a data cable insulated core wire with a special structure and a preparation method thereof, and relates to the technical field of signal transmission, in particular to the prepared data cable insulated core wire with the special structure, the prepared data cable insulated core wire comprises four inner conductors and an insulator, the inner conductors are wrapped by the insulator, and the four inner conductors are arranged in a star shape; in the four inner conductors, the distances between every two non-adjacent inner conductors are the same; and the insulator adopts a micropore structure with uniform and consistent pores. According to the invention, the insulated core wire is prepared by adopting a synchronous integrated extrusion molding technology of the four inner conductors, so that the length of each inner conductor in the insulated core wire is kept consistent, the spacing of the inner conductors is kept stable, a twisting or arranging process after a plurality of conductors are independently insulated in a traditional structure is omitted, the core wire filling coefficient is improved, the outer diameter of a finished product of the data cable is reduced, and the production cost is reduced. And signal delay distortion caused by path difference is effectively suppressed, crosstalk interference and signal transmission attenuation between line pairs are greatly reduced, and the signal transmission quality is improved.

Description

Technical Field

[0001] This invention relates to the field of signal transmission, specifically to a special structure data cable insulated core wire and its preparation method. Background Technology

[0002] Data cables, as the core carrier of signal transmission, are widely used in Ethernet, LANs, industrial control communications, and many other fields. The insulated core wires are a crucial component of data cables, undertaking the dual mission of electrical signal isolation and transmission. Currently, in Ethernet communication systems, two-pair core wire cables are one of the commonly used transmission media, capable of meeting basic data transmission requirements. Currently, the industry primarily uses two design schemes for the core wire arrangement of two-pair Ethernet cables: a star-shaped structure or a two-pair twisted-pair structure. The star-shaped structure typically involves converging and fixing one end of the four insulated core wires, forming a star-like arrangement; the two-pair twisted-pair structure first divides the four core wires into two groups, twisting the two core wires in each group together to form a twisted pair, and then combining the two twisted pairs to form a cable core wire unit.

[0003] However, in practical applications, the star-studded structure requires more spacing between the core wires to avoid excessive compression, while the combination of two independent twisted pairs in the two-pair twisted structure increases the overall space occupied by the core wire unit. Both of these situations directly result in a larger cable outer diameter, which not only increases the consumption of raw materials and production costs but also limits its application in confined installation spaces. Furthermore, the twisting symmetry of the four core wires in the star-studded structure is poor, easily leading to uneven distribution of capacitance and inductance among the core wires. In the two-pair twisted structure, the twisting parameters of the two twisted pairs are difficult to match perfectly, and the interaction between the twisted pairs further disrupts the electrical balance of a single pair of core wires. This electrical balance defect directly limits the cable's transmission frequency, failing to meet the high-frequency bandwidth requirements of high-speed data transmission. It also exacerbates signal attenuation, causing distortion and a decrease in signal-to-noise ratio during long-distance transmission, severely affecting the reliability and stability of data transmission.

[0004] Based on this, this application proposes a special structure data cable insulated core wire and its preparation method. Summary of the Invention

[0005] This application proposes a special structure data cable insulated core wire and its preparation method, which has the following advantages: The insulated core wire is prepared by using a four-inner-conductor synchronous integral extrusion molding technology, which ensures that the length of each inner conductor in the insulated core wire is consistent and the spacing between the inner conductors is kept stable. While reducing the outer diameter of the insulated core wire, it effectively suppresses signal delay distortion caused by path differences, significantly reduces crosstalk interference between wire pairs and signal transmission attenuation, improves signal transmission quality, and solves the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this application adopts the following technical solution: a method for preparing an insulated core wire of a data cable with a special structure, comprising the following steps: S1. The insulating material is mixed with additives and then subjected to aging and pressing processes to produce insulating blank rods. S2. Simultaneously load the four inner conductor coils into the pay-off structure and adjust the pay-off tension of the inner conductors. S3. Lead out the four inner conductors and insert them into the die core of the extruder. Then rotate the die core counterclockwise and connect it to the guide rod of the extruder using a threaded connection. The number of counterclockwise rotations of the die core is the same as the number of clockwise rotations when the die core is fixed. The four inner conductors are parallel, do not cross each other, and maintain uniform tension. S4. Place the insulating blank prepared in step S1 into the extrusion host. After extrusion, the insulating material is evenly coated on the four inner conductors to form the extruded material. S4. The extruded material passes through a gasification furnace and a sintering furnace in sequence, and is formed into microporous insulation to obtain an insulated core wire; S5. The insulated core wire passes through the wire storage structure and the winding structure in sequence to achieve continuous and stable winding operation.

[0007] Preferably, the compression ratio of the insulating material is 1500-2500; the additive ratio when mixing the insulating material is 17.5%; the aging temperature is 30℃-35℃; the wire tension is 200gf-400gf; the cylinder size of the extruder is 1.75 inch; the pressure is 50MPa-65MPa; the vaporization furnace temperature is 180℃; and the maximum temperature of the sintering furnace is 240℃.

[0008] Preferably, the mold core includes four threaded tubes and a mold sleeve covering the threaded tubes. The outer ring of the mold sleeve at the end away from the inlet end of the threaded tube is provided with a connecting thread, and the mold sleeve is connected to the guide rod of the extrusion host through the connecting thread.

[0009] Preferably, the spacing between any two non-adjacent conduits is 1.2 times the spacing between the corresponding inner conductors, and the surface roughness Ra of the inner wall of the conduit is ≤0.4μm; the outer diameter of the mold is 1.15 times the outer diameter of the insulation.

[0010] Preferably, the specific operation of S1 is as follows: First, put the insulating material and additives into the mixer, and mix the insulating material and additives thoroughly by the reciprocating motion of the mixer in the up-down and left-right directions; 2. Place the mixed material into an aging chamber at a temperature of 30℃~35℃ for 24h~48h. 3. Remove the material from the aging chamber and use a pressing machine to press the mixed powder into a blank to make an insulating rod.

[0011] Preferably, the conduit has a multi-segment structure, including a detection tube located in the inner cavity of the mold sleeve. Both ends of the detection tube are connected to the conduit body. The detection tube and the conduit body are coaxially arranged, and the inner diameter of the detection tube is larger than the inner diameter of the conduit body, while the outer diameter of the detection tube is the same as the outer diameter of the conduit body. The inner cavity of the mold is equipped with a vision sensor and a light source, and the detection tube has a viewing window on the side near the vision sensor.

[0012] A special structure data cable insulated core wire includes an inner conductor and insulation. The inner conductor is wrapped with insulation, and there are four inner conductors arranged in a star shape.

[0013] Preferably, among the four inner conductors, the spacing between any two non-adjacent inner conductors is the same.

[0014] Preferably, the insulation adopts a microporous structure with uniform and consistent pore size.

[0015] Preferably, the insulated core wire of the special structure data cable is prepared using the aforementioned method for preparing the insulated core wire of the special structure data cable.

[0016] The present invention has the following beneficial effects: 1. The insulated core wire is prepared by using a four-inner-conductor synchronous integrated extrusion molding technology, which ensures that the length of each inner conductor in the insulated core wire is consistent, keeps the spacing of the inner conductors stable, eliminates the stranding or arrangement process of multiple conductors after separate insulation in traditional structures, improves the core wire filling coefficient, and thus reduces the outer diameter of the finished data cable.

[0017] 2. The consistent physical length and spacing of the inner conductors ensure a high degree of electrical length matching for each transmission channel between wire pairs, effectively suppressing signal delay distortion caused by path differences. At the same time, the stable conductor spacing significantly improves the uniformity of the distribution parameters of each wire pair, greatly reducing crosstalk interference and signal transmission attenuation between wire pairs, thereby improving the signal transmission quality. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating a method for preparing a specially structured data cable insulated core wire proposed in this invention. Figure 2 A diagram of the equipment used in the fabrication of an insulated core wire for a data cable with a special structure. Figure 3 A 3D model of the mold core; Figure 4 This is a cross-sectional view of the mold core; Figure 5 for Figure 4 Enlarged diagram of A in the middle; Figure 6This is a cross-sectional view of the insulated core wire of a special structure data cable proposed in this invention.

[0019] In the diagram: 11. Inner conductor; 12. Insulation; 21. Wire feeding structure; 22. Pushing main unit; 23. Gasification furnace; 24. Sintering furnace; 25. Wire guide roller; 26. Wire storage structure; 27. Winding structure; 28. Die core; 31. Wire threading tube; 32. Die sleeve; 33. Connecting thread; 34. Vision sensor; 35. Light source; 311. Detection tube; 312. Wire threading tube body; 313. Viewing window. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to preferred embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 5 As shown, a method for preparing an insulated core wire of a data cable with a special structure includes the following steps: S1. The insulating material is mixed with additives and then subjected to aging and pressing processes to produce insulating blank rods. The specific operation is as follows: 1. Put the insulating material and additives into the mixer, and mix the insulating material and additives thoroughly by the reciprocating motion of the mixer in the up, down and left and right directions; the compression ratio of the insulating material is 1500 to 2500; the additive addition ratio is 17.5% when mixing the insulating material.

[0022] 2. Place the mixed material into an aging chamber at a temperature of 30℃~35℃ for 24h~48h. 3. Remove the material from the aging chamber and use a pressing machine to press the mixed powder into a blank to make an insulating rod.

[0023] S2. Simultaneously load the four inner conductor coils into the pay-off structure 21, and adjust the pay-off tension of the inner conductors to 200gf to 400gf.

[0024] S3. Lead out the four inner conductors 11 and insert them into the die core 28 of the extruder. Then, rotate the die core 28 counterclockwise and connect it to the guide rod of the extruder 22 using a threaded connection. The number of counterclockwise rotations of the die core 28 is the same as the number of clockwise rotations when the die core 28 is fixed. This ensures that after the die core 28 is installed, the four inner conductors are parallel, do not cross each other, and are arranged in a star shape, with uniform tension. This ensures that the length of each inner conductor remains consistent and the spacing between the inner conductors 11 remains stable during the fabrication process of the insulated core wire.

[0025] S4. The insulating blank prepared in step S1 is placed into the extrusion host 22. After extrusion, the insulating material is evenly coated on the four inner conductors 11 to form the extruded material. The cylinder size of the extruder is 1.75 inches and the pressure is 50MPa~65MPa. During the extrusion process, the outer diameter fluctuation of the insulating core wire is ±0.015mm.

[0026] S4. The extruded material passes through the vaporization furnace 23 and the sintering furnace 24 in sequence, and the microporous insulation 12 is formed to obtain the insulated core wire. The temperature of the vaporization furnace is 180℃, and the maximum temperature of the sintering furnace is 240℃. A sizing die is set at the outlet of the sintering furnace 24.

[0027] S5. The insulated core wire passes through the wire storage structure 26 and the winding structure 27 in sequence to achieve continuous and stable winding operation.

[0028] As described above, the insulated core wire prepared using the synchronous integrated extrusion molding technology of four inner conductors achieves consistent length of each inner conductor within the insulated core wire, ensuring stable spacing between the inner conductors. This eliminates the stranding or arrangement process after individual insulation of multiple conductors in traditional structures, improving the core wire fill factor and thus reducing the outer diameter of the finished data cable. Furthermore, it ensures a high degree of electrical length matching between each transmission channel of the wire pairs, effectively suppressing signal delay distortion caused by path differences. At the same time, the stable conductor spacing significantly improves the uniformity of the distribution parameters of each wire pair, greatly reducing crosstalk interference and signal transmission attenuation between wire pairs, thereby improving signal transmission quality.

[0029] As described above, a method for preparing insulated core wires for a special structure data cable is described. The apparatus used in this method includes a pay-off structure 21, a pusher, and a winding structure 27. The pusher is located between the winding structure 27 and the pay-off structure 21. Guide rollers 25 are provided between the pay-off structure 21 and the pusher, and between the winding structure 27 and the pusher, to constrain the core wire path and achieve precise guidance of the insulated core wire. The pusher includes a pusher main unit 22, a vaporization furnace 23, and a sintering furnace 24. Guide rollers 25 are also provided between the pusher main unit 22 and the vaporization furnace 23, and between the sintering furnace 24 and the vaporization furnace 23. A sizing die adapted to the size of the insulated core wire is provided at the sintering zone outlet. A wire storage structure 26 is provided between the sintering furnace 24 and the winding structure 27. The wire storage structure 26 controls the dynamic balance of the length of the insulated core wire between the winding structure 27 and the wire storage structure 26 through tension adjustment. This can effectively buffer the instantaneous fluctuation of the sintering furnace discharge speed and avoid abnormal fluctuations in the winding tension of the winding structure 27 caused by the sudden change in speed, thus ensuring the tension stability of the insulated core wire during the winding process.

[0030] The extruder's die core 28 includes four conduits 31 and a die sleeve 32 covering the conduits 31. The outer ring of the die sleeve 32, away from the wire inlet end of the conduit 31, is provided with a connecting thread 33. The die sleeve 32 is connected to the guide rod of the extruder main unit 22 via the connecting thread 33. The spacing between any two non-adjacent conduits 31 is 1.2 times the spacing between the corresponding inner conductors. The surface roughness Ra of the inner wall of the conduit 31 is ≤0.4μm. The outer diameter of the die sleeve 32 is 1.15 times the outer diameter of the insulation 12.

[0031] The conduit 31 has a multi-segment structure, including a detection tube 311 located inside the cavity of the mold sleeve 32. Both ends of the detection tube 311 are connected to a conduit body 312. The detection tube 311 and the conduit body 312 are coaxially arranged, with the inner diameter of the detection tube 311 larger than the inner diameter of the conduit body 312, and the outer diameter of the detection tube 311 being the same as the outer diameter of the conduit body 312. The size of the detection tube 311 can be set according to requirements and is not limited here. Through the setting of the detection tube 311, the inner conductor can be suspended within the detection tube 311, improving the accuracy of visual inspection. The inner cavity of the mold sleeve 32 is equipped with a vision sensor 34 and a light source 35, and the detection tube 311 has a viewing window 313 on the side near the vision sensor 30. The vision sensor 34 can collect data on the position of the inner conductor inside the conduit 31. Based on the collected data and the base position data of the inner conductor inside the conduit 31 when it is not worn, the controller of this application can determine whether the conduit 31 is worn. When wear occurs, the controller of this application can trigger an early warning mechanism so that the staff can replace the worn conduit 31 in time.

[0032] In Example 2, the inner conductor 11 is a single silver-plated copper wire with a surface roughness Ra≤0.8μm, an outer diameter tolerance ≤±0.003mm, an outer diameter tolerance ≤±0.01mm, and the insulation material is polytetrafluoroethylene with an insulation density of 1.7±0.05 and a dielectric constant of 1.5~1.6.

[0033] The steps for preparing a 24AWG inner conductor insulated core wire using a special structure data cable insulated core wire preparation method are as follows: (1) Select a grade of polytetrafluoroethylene material with a compression ratio of 1500 to 2500, and add 17.5% of the additives. Place the added material in a mixer and mix the polytetrafluoroethylene material and the additives thoroughly by reciprocating the up-down and left-right movements of the mixer. (2) Place the mixed material into an aging chamber at a temperature of 30℃~35℃ for aging time of 24h~48h; (3) Take the material out of the aging chamber and use a compact press to press the polytetrafluoroethylene powder into a compact; (4) Place the blank into the extruder, install the inner conductor of the silver-plated copper wire with the required surface roughness into the wire feeding frame, and adjust the tension of the wire feeding frame. The wire feeding tension is 300gf. (5) Connect the die core with a spacing of 2.1mm between non-adjacent stainless steel tubes to the guide rod of the extrusion machine through the connecting thread 33, and record the number of rotations; (6) Lead out the 4 inner conductors and insert them into the mold core. Rotate them counterclockwise in advance, with the number of rotations being the same as the number of rotations when fixed. After completing the rotation, connect the mold core to the guide rod by rotation to ensure that the 4 core wires are parallel and do not cross each other. (7) Place the 3.5mm die into the extruder and merge the extruder head; (8) Set the temperature of the gasification furnace of the extrusion equipment to 180℃, and the temperatures of each sintering zone to 140℃, 195℃, 200℃, 240℃, 200℃ and 150℃ respectively. Fix a sizing mold with a size of 3.05mm at the outlet of the sintering zone. (9) Turn on the extruder, set the traction speed to 8m / min to 12m / min, adjust the push rod speed to adjust the outer diameter of the core wire that has just been extruded but has not yet entered the gasification furnace to 3.50mm to 3.55mm. Adjust the traction speed at any time during the extrusion process to keep the fluctuation value of the outer diameter at ±0.015mm. (10) Two non-adjacent inner conductors with a spacing of 1.75 mm and an outer diameter of 3.05 mm are obtained.

[0034] The steps for preparing a 26AWG inner conductor insulated core wire using a special structure data cable insulated core wire preparation method are as follows: (1) Select a polytetrafluoroethylene material with a compression ratio of 1500 to 2500 and an additive addition ratio of 17.5%. Put the added material into a mixer and mix the polytetrafluoroethylene material and additives thoroughly by reciprocating the up-down and left-right movements of the mixer. (2) Place the mixed material into an aging chamber at a temperature of 30℃~35℃ for aging time of 24h~48h; (3) Take the material out of the aging chamber and use a compact press to press the polytetrafluoroethylene powder into a compact; (4) Place the blank into the extruder, install the inner conductor of the silver-plated copper wire with the required surface roughness into the wire feeding frame, and adjust the tension of the wire feeding frame. The wire feeding tension is 250gf. (5) Connect the die core with a spacing of 1.75mm between non-adjacent stainless steel tubes to the guide rod of the extrusion machine through the connecting thread 33, and record the number of rotations; (6) Lead out the 4 inner conductors and insert them into the mold core. Rotate them counterclockwise in advance, with the number of rotations being the same as the number of rotations when fixed. After completing the rotation, connect the mold core to the guide rod by rotation to ensure that the 4 core wires are parallel and do not cross each other. (7) Place the 2.90mm die into the extruder and merge the extruder head; (8) Set the temperature of the gasification furnace of the extrusion equipment to 180℃, and the temperatures of each sintering zone to 140℃, 195℃, 200℃, 230℃, 200℃ and 150℃ respectively. Fix a sizing mold with a size of 2.53mm at the outlet of the sintering zone. (9) Turn on the extruder, set the traction speed to 10m / min to 15m / min, adjust the push rod speed to adjust the outer diameter of the core wire that has just been extruded but has not yet entered the gasification furnace to 2.90mm to 2.95mm. Adjust the traction speed at any time during the extrusion process to keep the fluctuation value of the outer diameter at ±0.015mm. (10) Two non-adjacent inner conductors with a spacing of 1.47 mm and an outer diameter of 2.53 mm are obtained.

[0035] like Figure 6 As shown, a special structure data cable insulated core wire is prepared using a special structure data cable insulated core wire preparation method. It includes an inner conductor 11 and insulation 12. The inner conductors 11 are wrapped by the insulation 12. There are four inner conductors 11 arranged in a star shape. The spacing between any two non-adjacent inner conductors 11 is the same. The insulation 12 adopts a microporous structure with uniform pore size.

[0036] In summary, this invention enables the synchronous integral extrusion of four inner conductors, ensuring that the physical length of each inner conductor remains consistent and the spacing between them is stable. This structure of the insulated core wire allows for a reduction in the outer diameter of the finished cable, maintains consistent electrical length for each transmission path between wire pairs, enables the transmission of higher frequencies, exhibits lower attenuation, and delivers higher quality signals.

[0037] The beneficial effects of this invention are: 1) small size and light weight; 2) low dielectric constant and low dielectric loss; 3) high consistency of inner conductor electrical length; 4) superior temperature resistance (-55℃ to +200℃). Cables processed using the insulated core wires of this invention can achieve higher transmission frequencies, lower attenuation, support network transmission of 10 Gigabit Ethernet and above, and have the advantages of superior temperature resistance, saving installation space and reducing product weight. Compared with existing data cables, the signal transmission quality and speed are better, and the finished product can be widely used in aerospace, high-speed transmission and other fields.

[0038] All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional techniques such as bolt connections that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The materials and specifications of each component can be selected according to requirements and are not limited here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing an insulated core wire of a data cable with a special structure, characterized in that, Includes the following steps: S1. The insulating material is mixed with additives and then subjected to aging and pressing processes to produce insulating blank rods. S2. Simultaneously insert the four inner conductor coils into the wire feeding structure (21) and adjust the wire feeding tension of the inner conductors. S3. Lead out the four inner conductors (11) and insert them into the die core (28) of the extruder. Then rotate the die core (28) counterclockwise and connect it to the guide rod of the extruder host (22) using a threaded connection. The number of counterclockwise rotations of the die core (28) is the same as the number of clockwise rotations when the die core (28) is fixed. The four inner conductors are parallel, do not cross each other, are arranged in a star shape, and the tension is kept uniform. S4. Place the insulating blank prepared in step S1 into the extrusion host (22). After extrusion, the insulating material is evenly coated on the four inner conductors (11) to form the extruded material. S4. The extruded material passes through a gasification furnace (23) and a sintering furnace (24) in sequence, and is formed by microporous insulation (12) to obtain an insulated core wire; S5. The insulated core wire passes through the wire storage structure (26) and the winding structure (27) in sequence to achieve continuous and stable winding operation.

2. The method for preparing the insulated core wire of a special structure data cable according to claim 1, characterized in that: The compression ratio of the insulating material is 1500-2500; the additive ratio when mixing the insulating material is 17.5%; the aging temperature is 30℃-35℃; the wire tension is 200gf-400gf; the cylinder size of the extruder is 1.75 inch; the pressure is 50MPa-65MPa; the vaporization furnace temperature is 180℃; and the maximum temperature of the sintering furnace is 240℃.

3. The method for preparing a special structure data cable insulated core wire according to claim 1, characterized in that: The mold core (28) includes four wire tubes (31) and a mold sleeve (32) covering the wire tubes (31). The outer ring of the mold sleeve (32) away from the wire inlet end of the wire tube (31) is provided with a connecting thread (33). The mold sleeve (32) is connected to the guide rod of the extrusion host (22) by means of the connecting thread.

4. The method for preparing a special structure data cable insulated core wire according to claim 3, characterized in that: The spacing between any two non-adjacent conduits (31) is 1.2 times the spacing between the corresponding inner conductors, and the surface roughness Ra of the inner wall of the conduit (31) is ≤0.4μm; the outer diameter of the mold (32) is 1.15 times the outer diameter of the insulation (12).

5. The method for preparing a special structure data cable insulated core wire according to claim 1, characterized in that: The specific operation of S1 is as follows: First, put the insulating material and additives into the mixer, and mix the insulating material and additives thoroughly by the reciprocating motion of the mixer in the up, down, left and right directions.

2. Place the mixed material into an aging chamber at a temperature of 30℃~35℃ for 24h~48h.

3. Remove the material from the aging chamber and use a pressing machine to press the mixed powder into a blank to make an insulating rod.

6. The method for preparing a special structure data cable insulated core wire according to claim 3, characterized in that: The conduit (31) has a multi-segment structure, including a detection tube (311) located in the inner cavity of the mold sleeve (32). Both ends of the detection tube (311) are connected to the conduit body (312). The detection tube (311) and the conduit body (312) are coaxially arranged, and the inner diameter of the detection tube (311) is larger than the inner diameter of the conduit body (312). The outer diameter of the detection tube (311) is the same as the outer diameter of the conduit body (312). The inner cavity of the mold (32) is provided with a vision sensor (34) and a light source (35), and the detection tube (311) is provided with a viewing window (313) on the side near the vision sensor (34).

7. A special structure data cable insulated core wire, characterized in that: It includes an inner conductor (11) and insulation (12), the inner conductor (11) is wrapped by insulation (12), and there are four inner conductors (11) arranged in a star shape.

8. The insulated core wire of a special structure data cable according to claim 7, characterized in that: In the four inner conductors (11), the spacing between any two non-adjacent inner conductors (11) is the same.

9. The insulated core wire of a special structure data cable according to claim 7, characterized in that: The insulation (12) adopts a microporous structure with uniform pore size.

10. The insulated core wire of a special structure data cable according to claim 7, characterized in that: A special structure data cable insulated core wire is prepared using the preparation method of the special structure data cable insulated core wire described in claim 1.

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