An anti-interference signal control cable and its production process

Abstract

The present invention discloses an anti-interference signal control cable and a production process thereof, and relates to the field of cable technology. The production process of the present invention comprises the following steps: S1: after copper wire drawing, surface treatment and twisting, a conductor is obtained; S2: a conductor shielding layer is coated on the outside of the conductor, and an insulating layer is coated on the outside of the conductor shielding layer to obtain an insulating core wire; S3: two insulating core wires are twisted to obtain a twisted pair core; S4: the twisted pair cores are twisted to obtain a cable core; S5: a shielding layer is coated on the outside of the cable core, and a sheath layer is coated on the outside of the shielding layer to obtain an anti-interference signal control cable. The material prepared in the present application still maintains low volume resistivity, excellent electromagnetic interference shielding performance and mechanical properties under a wide temperature change.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to an anti-interference signal control cable and a production process thereof. Background Art

[0002] With the rapid development of my country's high-speed rail, the high-speed rail digital signal cable production industry has ushered in a rare development opportunity. In the application environment of high-speed rail digital signal cables, the external interference sources that affect the transmission characteristics of cable lines are mainly transmission lines, electrified railway contact networks, high-power electrical equipment, lightning discharges, radio stations and cable broadcasting networks. There are two types of impacts caused by these field sources on the high-speed rail digital model cable lines laid along the high-speed rail lines, namely dangerous impacts and interference impacts. The dangerous impacts and interference impacts caused by this external electromagnetic field have a significant impact on the transmission route of the high-speed rail digital signal cable. The severity of this malfunction phenomenon, in addition to not being able to correctly reflect the current status of the circuit, will also cause the promotion display of the signal, endangering personal safety. The unbalanced index of the capacitance to ground of the high-speed rail digital signal cable is a key indicator for evaluating the cable's resistance to external interference. The unbalanced capacitance to ground of the signal cable will increase the interference of the adjacent interference source on the cable crosstalk. The size of the capacitance imbalance indicates the cable's ability to resist external interference.

[0003] Shielding is a very effective and widely used anti-interference measure in industrial interconnect cables. All interference involving electric or magnetic fields can be suppressed by this method. Shielding can prevent interference sources from having harmful effects on the inside of the equipment or system, and can prevent harmful electromagnetic radiation in the equipment or system from propagating outward. The quality of the shield is described by shielding effectiveness, which reflects the degree of attenuation of electromagnetic waves by the shield. The shielding materials of cross-linked polyethylene insulated cables are mainly composed of ethylene polymers, olefin copolymer elastomers, conductive carbon black and additives; carbon black maintains a certain high-level structure in the polymer matrix to form a conductive path to obtain higher conductivity. The conductivity of the material depends on the dispersion and distribution of carbon black. The change in volume resistivity is mainly affected by the volume expansion effect and the electron thermal transition effect. At the beginning of the temperature rise, near room temperature, the molecular chain has low mobility and small volume expansion, and the change in volume resistivity has little to do with temperature. As the temperature rises, the semiconductor composite material shows a positive temperature coefficient. When the temperature reaches the melting temperature of the olefin copolymer elastomer, the volume expansion coefficient increases rapidly, and the conductive network of the carbon black clusters is destroyed to varying degrees, resulting in a rapid increase in the volume resistivity of the material. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-interference signal control cable and a production process thereof to solve the following technical problems:

[0005] Directly adding conductive carbon black to existing semi-conductive shielding materials causes the volume expansion coefficient to increase rapidly when the material is used at high temperatures, and the conductive network of carbon black clusters is destroyed to varying degrees, resulting in a rapid increase in the volume resistivity of the material.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A production process for an anti-interference signal control cable comprises the following steps:

[0008] S1: The wire drawing machine draws the copper material, smoothes the surface, and twists it to obtain the conductor;

[0009] S2: A semi-conductive shielding layer is coated on the conductor, and an insulating layer is coated on the side of the semi-conductive shielding layer away from the conductor to obtain an insulated core wire;

[0010] S3: Twisting two insulated core wires to obtain a twisted pair core;

[0011] S4: twisting the twisted pair cores to obtain a cable core;

[0012] S5: Covering the cable core with a shielding layer, and covering the shielding layer with a sheath layer on the side away from the cable core to obtain an interference-proof signal control cable;

[0013] The semiconductive shielding layer and the shielding layer are both made of modified polypropylene material, and the modified polypropylene material comprises the following raw materials in parts by weight: 40-60 parts by weight of polypropylene, 20-35 parts by weight of conductive material, and 60-90 parts by weight of ethylene-octene copolymer elastomer.

[0014] As a further solution of the present invention: the method for preparing the conductive material comprises the following steps:

[0015] A1: Add tetramethylenediamine and acetic acid into reaction kettle A, add dichloromaleic anhydride, raise the temperature to 40-50°C, keep the temperature for 24-48 hours, rotary evaporate and wash to obtain component 1;

[0016] A2: Add component 1, 1,3,5-tri(4-aminophenyl)benzene and acetic acid into reactor B, disperse evenly, heat to 120-130°C, keep warm for 24-36 hours, filter, wash and dry to obtain component 2;

[0017] A3: Add component 2 and methanol into reactor C, add sodium borohydride, stir at room temperature for 1-3 hours, add deionized water to stop the reaction, concentrate under reduced pressure, extract, wash and dry to obtain component 3;

[0018] A4: Add component three, dichloromethane, 4-aminothiophenol, and boron trifluoride ether complex into a reaction bottle, stir at room temperature for 1-3 hours, extract, wash, and dry to obtain component four;

[0019] A5: Mix aniline, ammonium persulfate and hydrochloric acid solution, add component 4, stir at room temperature for 3-6 hours, filter, wash and dry to obtain a conductive material.

[0020] As a further embodiment of the present invention: the mass ratio of tetramethylenediamine, acetic acid and dichloromaleic anhydride in A1 is 1:60-120:1-2.

[0021] As a further embodiment of the present invention: the mass ratio of component 1, 1,3,5-tris(4-aminophenyl)benzene and acetic acid in A2 is 10:4-8:200-500.

[0022] As a further solution of the present invention: the mass ratio of component 2, methanol and sodium borohydride in A3 is 1-1.5:15-30:0.1-0.2.

[0023] As a further embodiment of the present invention, the mass ratio of component three, dichloromethane, 4-aminothiophenol, and boron trifluoride ether complex (CAS: 109-63-7) in A4 is 5-8:100-200:3-5:2-4.

[0024] As a further embodiment of the present invention: the hydrochloric acid solution in A5 is a 1-2 mol / L hydrochloric acid aqueous solution, and the addition ratio of aniline, ammonium persulfate, hydrochloric acid solution, and component four is 1-5 g: 1-3 g: 50-100 mL: 2.5 g.

[0025] As a further solution of the present invention: the sheath layer is made of a sheath material, and the sheath material is SG-3 type polyvinyl chloride resin.

[0026] As a further solution of the present invention: the polypropylene is copolymerized polypropylene, brand K8303.

[0027] As a further solution of the present invention: the ethylene-octene copolymer elastomer is an ethylene-octene copolymer elastomer with the brand number POE8201.

[0028] As a further solution of the present invention: the insulating layer is made of insulating material, and the insulating material is copolymer polypropylene, brand K8303.

[0029] An anti-interference signal control cable is made by any of the above production processes.

[0030] Beneficial effects of the present invention:

[0031] (1) The present application uses tetramethylenediamine and dichloromaleic anhydride as raw materials for reaction to obtain component one; and uses 1,3,5-tri(4-aminophenyl)benzene to react with component one to obtain component two; component two prepared in the present application is a porous polymer, and nitrogen atoms are doped on the molecular chain. The present application continues to use component two as a matrix to graft amino groups on the surface of the matrix with 4-aminothiophenol in sequence, and uses aniline copolymerization to polymerize and graft polyaniline molecular chains on the surface of the matrix to obtain a conductive material. The conductive material prepared in the present application replaces the conductive carbon black in the prior art and is added to the polypropylene material for blending. The conductive material prepared in the present application forms a cluster network structure in the composite material. The present application makes the network structure of the conductive material more lost. With the polymerization of the surface polyaniline, the size of the mesh in the conductive network of the conductive material decreases, the distance between the conductive materials is shortened, and the conductivity of the material is increased. After filling the conductive material, a conductive network is formed, which makes the insulating polymer material conductive. The obtained modified polypropylene material is used to prepare a semi-conductive shielding layer and a shielding layer with good shielding performance and response function to current signals.

[0032] (2) The volume resistivity of the semiconductive shielding layer prepared by adding the conductive material prepared in the present application to the matrix has a high temperature stability. As the temperature rises, the thermal motion of the molecular chain in the polymer changes little. The thermal expansion coefficient of the conductive material prepared in the present application is similar to that of polypropylene and olefin copolymers. The distance of the conductive material matches the minimum distance for forming the electron tunneling effect. The volume resistivity still maintains a low change value during the temperature change process.

[0033] (3) The conductive material prepared in this application is added with a semi-conductive shielding layer and a shielding layer prepared in a polypropylene and olefin copolymer matrix, and an insulating layer is set between the semi-conductive shielding layer and the shielding layer, and the insulating layer is prepared with polypropylene as raw material. When electromagnetic waves are incident, they are first reflected once at the junction of air and material. Since the impedance mismatch at the interface of layered materials is higher, more electromagnetic waves are reflected and consumed; the insulating layer and the layer prepared by modified polypropylene material are arranged alternately, so that electromagnetic waves can be reflected multiple times after entering the material due to the impedance mismatch between layers, consuming energy. At the same time, multiple reflections also increase the absorption path of the material, so that more electromagnetic waves are absorbed in the conductive layer in the form of dielectric loss due to the eddy current effect. The conductive material is evenly distributed in the matrix, forming a conductive path in the entire system, which is not only beneficial to the reflection loss of electromagnetic waves at the interface of the material, but also beneficial to the dielectric loss of electromagnetic waves inside the material, thereby improving the electromagnetic shielding performance of the composite material.

[0034] (4) The conductive material prepared in the present application is a porous framework structure, and the cross-linked polymer network is embedded in the polymer matrix to form the required conductive system. When stretched, the framework structure formed by dynamic ionic bonds, hydrogen bonds or chemical assembly inside will change in shape and size as the polymer chain segments bend and stretch, and has good adhesion and mechanical properties with the insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 It is a cross-sectional schematic diagram of the anti-interference signal control cable of the present invention;

[0037] Figure 2 is a schematic cross-sectional view of a cable core of the cable of the present invention;

[0038] In the figure: 1, cable core; 2, shielding layer; 3, sheath layer; 4, twisted pair core; 5, insulated core wire; 501, conductor; 502, semi-conductive shielding layer; 503, insulating layer. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0040] Example 1

[0041] The method for preparing the conductive material comprises the following steps:

[0042] A1: Add 20 g of tetramethylenediamine and 1200 g of acetic acid into reactor A, add 20 g of dichloromaleic anhydride, heat to 40°C, keep warm for 24 hours, rotary evaporate and wash to obtain component 1;

[0043] A2: Add 20g of component 1, 8g of 1,3,5-tris(4-aminophenyl)benzene and 400g of acetic acid into reactor B, disperse evenly, heat to 120°C, keep warm for 24h, filter, wash and dry to obtain component 2;

[0044] A3: Add 10g of component 2 and 150g of methanol into reactor C, add 1g of sodium borohydride, stir at room temperature for 1h, add deionized water to stop the reaction, concentrate under reduced pressure, extract with ethyl acetate, wash and dry to obtain component 3;

[0045] A4: Add 10g of component three, 200g of dichloromethane, 6g of 4-aminothiophenol, and 4g of boron trifluoride ether complex into a reaction bottle, stir at room temperature for 1h, extract with dichloromethane, wash, and dry to obtain component four;

[0046] A5: Mix 4 g of aniline, 4 g of ammonium persulfate, and 200 mL of 1-2 mol / L hydrochloric acid aqueous solution, add 10 g of component 4, stir at room temperature for 3 h, filter, wash, and dry to obtain a conductive material.

[0047] Example 2

[0048] The method for preparing the conductive material comprises the following steps:

[0049] A1: Add 20g of tetramethylenediamine and 2000g of acetic acid into reactor A, add 30g of dichloromaleic anhydride, heat to 45°C, keep warm for 36h, rotary evaporate and wash to obtain component 1;

[0050] A2: Add 20g of component 1, 14g of 1,3,5-tris(4-aminophenyl)benzene and 800g of acetic acid into reactor B, disperse evenly, heat to 125°C, keep warm for 30h, filter, wash and dry to obtain component 2;

[0051] A3: Add 12 g of component 2 and 200 g of methanol into reactor C, add 1.5 g of sodium borohydride, stir at room temperature for 2 h, add deionized water to stop the reaction, concentrate under reduced pressure, extract with ethyl acetate, wash, and dry to obtain component 3;

[0052] A4: Add 10g of component three, 300g of dichloromethane, 8g of 4-aminothiophenol, and 6g of boron trifluoride ether complex into a reaction bottle, stir at room temperature for 2h, extract with dichloromethane, wash, and dry to obtain component four;

[0053] A5: Mix 10 g of aniline, 10 g of ammonium persulfate, and 300 mL of 1 mol / L hydrochloric acid aqueous solution, add 10 g of component 4, stir at room temperature for 6 h, filter, wash, and dry to obtain a conductive material.

[0054] Example 3

[0055] The method for preparing the conductive material comprises the following steps:

[0056] A1: Add 20 g of tetramethylenediamine and 2400 g of acetic acid into reactor A, add 40 g of dichloromaleic anhydride, heat to 50°C, keep warm for 48 hours, rotary evaporate and wash to obtain component 1;

[0057] A2: Add 20g of component 1, 16g of 1,3,5-tris(4-aminophenyl)benzene and 1000g of acetic acid into reactor B, disperse evenly, heat to 130°C, keep warm for 36h, filter, wash and dry to obtain component 2;

[0058] A3: Add 15g of component 2 and 300g of methanol into reactor C, add 2g of sodium borohydride, stir at room temperature for 3h, add deionized water to stop the reaction, concentrate under reduced pressure, extract with ethyl acetate, wash and dry to obtain component 3;

[0059] A4: Add 16 g of component three, 400 g of dichloromethane, 10 g of 4-aminothiophenol, and 8 g of boron trifluoride ether complex into a reaction bottle, stir at room temperature for 3 h, extract with dichloromethane, wash, and dry to obtain component four;

[0060] A5: Mix 20 g of aniline, 12 g of ammonium persulfate, and 400 mL of 1 mol / L hydrochloric acid aqueous solution, add 10 g of component 4, stir at room temperature for 6 h, filter, wash, and dry to obtain a conductive material.

[0061] Example 4

[0062] The modified polypropylene material includes the following raw materials in parts by weight:

[0063] 40 parts by weight of polypropylene (copolymer polypropylene with the brand name K8303), 20 parts by weight of the conductive material prepared in Example 1, and 60 parts by weight of ethylene-octene copolymer elastomer with the brand name POE8201.

[0064] Example 5

[0065] The modified polypropylene material includes the following raw materials in parts by weight:

[0066] 40 parts by weight of polypropylene (copolymer polypropylene with the brand name K8303), 20 parts by weight of the conductive material prepared in Example 2, and 60 parts by weight of ethylene-octene copolymer elastomer with the brand name POE8201.

[0067] Example 6

[0068] The modified polypropylene material includes the following raw materials in parts by weight:

[0069] 40 parts by weight of polypropylene (copolymer polypropylene with the brand name K8303), 20 parts by weight of the conductive material prepared in Example 3, and 60 parts by weight of ethylene-octene copolymer elastomer with the brand name POE8201.

[0070] Example 7

[0071] See also Figure 1-2 , a production process for anti-interference signal control cable, comprising the following steps:

[0072] S1: The wire drawing machine draws the copper material, performs surface smoothing treatment, and twists it to obtain the conductor 501;

[0073] S2: The modified polypropylene material prepared in Example 4 is coated on the outside of the conductor 501 as a semi-conductive shielding layer 502, and the copolymer polypropylene with the brand K8303 is coated on the side of the conductor shielding layer 502 away from the conductor 501 as an insulating layer 503 to obtain an insulated core wire 5;

[0074] S3: twisting two insulated core wires 5 to obtain a twisted pair core 4;

[0075] S4: twisting the twisted pair core 4 to obtain the cable core 1;

[0076] S5: The modified polypropylene material prepared in Example 4 is coated on the cable core 1 as a shielding layer 2, and the side of the shielding layer 2 away from the cable core 1 is coated with SG-3 type polyvinyl chloride resin as a sheath layer 3 to obtain an interference-proof signal control cable.

[0077] Example 8

[0078] See also Figure 1-2 Compared with Example 7, this embodiment only replaces the modified polypropylene material prepared in Example 4 used in Example 7 with the modified polypropylene material prepared in Example 5 in equal amount, and the other components and production processes are completely the same.

[0079] Example 9

[0080] See also Figure 1-2 Compared with Example 7, this embodiment only replaces the modified polypropylene material prepared in Example 4 used in Example 7 with the modified polypropylene material prepared in Example 6 in equal amount, and the other components and production processes are completely the same.

[0081] Comparative Example 1

[0082] The method for preparing the conductive material comprises the following steps:

[0083] A1: Add 20 g of tetramethylenediamine and 1200 g of acetic acid into reactor A, add 20 g of dichloromaleic anhydride, heat to 40°C, keep warm for 24 hours, rotary evaporate and wash to obtain component 1;

[0084] A2: Add 20g of component 1, 8g of 1,3.5-tris(4-aminophenyl)benzene and 400g of acetic acid into reactor B, disperse evenly, heat to 120°C, keep warm for 24h, filter, wash and dry to obtain a conductive material.

[0085] Comparative Example 2

[0086] The method for preparing the conductive material comprises the following steps:

[0087] A1: Add 20 g of tetramethylenediamine and 1200 g of acetic acid into reactor A, add 20 g of dichloromaleic anhydride, heat to 40°C, keep warm for 24 hours, rotary evaporate and wash to obtain component 1;

[0088] A2: Add 20g of component 1, 8g of 1,3.5-tris(4-aminophenyl)benzene and 400g of acetic acid into reactor B, disperse evenly, heat to 120°C, keep warm for 24h, filter, wash and dry to obtain component 2;

[0089] A3: Add 10g of component 2 and 150g of methanol into reactor C, add 1g of sodium borohydride, stir at room temperature for 1h, add deionized water to stop the reaction, concentrate under reduced pressure, extract with ethyl acetate, wash and dry to obtain a conductive material.

[0090] Comparative Example 3

[0091] The modified polypropylene material includes the following raw materials in parts by weight:

[0092] Compared with Example 4, in Comparative Example 3, only the conductive material added in Example 4 is replaced by the conductive material prepared in Comparative Example 1 in equal amount, and the other components are completely consistent with those in Example 4.

[0093] Comparative Example 4

[0094] The modified polypropylene material includes the following raw materials in parts by weight:

[0095] Compared with Example 4, Comparative Example 4 only replaces the conductive material added in Example 4 with the conductive material prepared in Comparative Example 2 in equal amount, and the other components are completely consistent with Example 4.

[0096] Comparative Example 5

[0097] Compared with Example 7, only the modified polypropylene material prepared in Example 4 used in Example 7 is replaced by the modified polypropylene material prepared in Example 5 in equal amount, and the other components and production processes are completely the same.

[0098] Comparative Example 6

[0099] Compared with Example 7, only the modified polypropylene material prepared in Example 4 used in Example 7 is replaced by the modified polypropylene material prepared in Comparative Example 4 in equal amount, and the other components and production processes are completely the same.

[0100] Comparative Example 7

[0101] Compared with Example 7, only the modified polypropylene material prepared in Example 4 used in Example 7 is replaced by the modified polypropylene material prepared in Comparative Example 5 in equal amounts, and the other components and production processes are completely the same.

[0102] Performance Testing

[0103] (1) Volume resistivity: According to GB / T11017.2-2014 "Rated voltage 110kV cross-linked polyethylene insulated power cable and its accessories Part 2: Cable", the sample is tested using the four-electrode method. The sample size is 110mm×50mmx1mm, the average heating rate is 2℃ / min, and the test results are shown in Table 1;

[0104] Table 1: Volume resistivity statistics of Examples 4-6 and Comparative Examples 3-4

[0105]

[0106] It can be seen from Table 1 that the modified polypropylene material prepared in the present application has a low volume resistivity as a semi-conductive shielding layer and a shielding layer material, and is used as a shielding material in cables, and still maintains a low volume resistivity at an operating temperature of 30-120 degrees Celsius.

[0107] (2) Electromagnetic interference shielding performance test:

[0108] Sample preparation:

[0109] ① At room temperature, the raw materials of the modified polypropylene material were extruded and granulated according to the ratios of Examples 4-6 using a twin-screw extruder of model SHJ20 produced by Nanjing Jieente Electromechanical Co., Ltd., with a processing temperature of 210° C. and a screw speed of 13.5 r / min to obtain a modified polypropylene material.

[0110] ② At room temperature, use a single-screw extruder of model SJ30 produced by Zhangjiagang Chuangjia Machinery Co., Ltd. to extrude the modified polypropylene material and the copolymer polypropylene of brand K8303 as the raw material of the insulating layer through the extruder, respectively, with a processing temperature of 210°C and a screw speed of 8.5r / min. And co-extrude the composite sheet, the thickness of the layered material is 2mm. Among them, Example 4 is a composite sheet obtained by co-extruding the raw material and the copolymer polypropylene, which is Example 4-1; Example 5 is a composite sheet obtained by co-extruding the raw material and the copolymer polypropylene, which is Example 5-1; Example 6 is a composite sheet obtained by co-extruding the raw material and the copolymer polypropylene, which is Example 6-1; Comparative Example 3 is a composite sheet obtained by co-extruding the raw material and the copolymer polypropylene, which is Comparative Example 3-1; Comparative Example 4 is a composite sheet obtained by co-extruding the raw material and the copolymer polypropylene, which is Comparative Example 4-1;

[0111] According to the military standard SJ20524 of the electronics industry of the People's Republic of China, the electromagnetic shielding performance of Example 4-1, Example 5-1, Example 6-1, Comparative Example 3-1, and Comparative Example 4-1 was tested using an Agilent 8720 ET electromagnetic shielding tester to detect the electromagnetic wave shielding performance at 0.5-18 GHz. The sample was a disc with a diameter of 10 mm and a thickness of 2 mm. The test results are shown in Table 2;

[0112] (3) Mechanical property test: Using a SANS microcomputer-controlled electronic universal testing machine, at room temperature, a load of 500N, and a tensile speed of 50mm / min, Example 4-1, Example 5-1, Example 6-1, Comparative Example 3-1, and Comparative Example 4-1 were tested. The test results are shown in Table 2.

[0113] Table 2: Statistical table of performance test data of Examples 4-1 to 6-1 and Comparative Examples 3-1 to 4-1

[0114]

[0115] It can be seen from Table 2 that the modified polypropylene material prepared in the present application is composited with the polypropylene material of the insulating layer and has excellent mechanical properties and electromagnetic shielding properties.

[0116] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A production process for anti-interference signal control cables, characterized in that: The steps include: S1: A wire drawing machine draws the copper material, performs surface smoothing treatment, and twists the copper material to obtain a conductor (501); S2: Wrapping a semi-conductive shielding layer (502) around the conductor (501), and wrapping an insulating layer (503) around a side of the semi-conductive shielding layer (502) away from the conductor (501), to obtain an insulated core wire (5); S3: twisting two insulated core wires (5) to obtain a twisted pair core (4); S4: twisting the twisted pair cores (4) to obtain a cable core (1); S5: Covering the cable core (1) with a shielding layer (2), and covering the shielding layer (2) with a sheath layer (3) on a side away from the cable core (1), thereby obtaining an interference-proof signal control cable; The semi-conductive shielding layer (502) and the shielding layer (2) are both made of modified polypropylene material, wherein the modified polypropylene material comprises the following raw materials in parts by weight: 40-60 parts by weight of polypropylene, 20-35 parts by weight of conductive material, and 60-90 parts by weight of ethylene-octene copolymer elastomer; The method for preparing the conductive material comprises the following steps: A1: Add tetramethylenediamine and acetic acid into reaction kettle A, add dichloromaleic anhydride, raise the temperature to 40-50°C, keep the temperature for 24-48 hours, rotary evaporate and wash to obtain component 1; A2: Add component 1, 1,3,5-tri(4-aminophenyl)benzene and acetic acid into reactor B, disperse evenly, heat to 120-130°C, keep warm for 24-36 hours, filter, wash and dry to obtain component 2; A3: Add component 2 and methanol into reactor C, add sodium borohydride, stir at room temperature for 1-3 hours, add deionized water to stop the reaction, concentrate under reduced pressure, extract, wash and dry to obtain component 3; A4: Add component three, dichloromethane, 4-aminothiophenol, and boron trifluoride ether complex into a reaction bottle, stir at room temperature for 1-3 hours, extract, wash, and dry to obtain component four; A5: Mix aniline, ammonium persulfate and hydrochloric acid solution, add component 4, stir at room temperature for 3-6 hours, filter, wash and dry to obtain a conductive material.

2. The production process of an anti-interference signal control cable according to claim 1 is characterized in that: The mass ratio of tetramethylenediamine, acetic acid and dichloromaleic anhydride in A1 is 1:60-120:1-2.

3. The production process of an anti-interference signal control cable according to claim 1 is characterized in that: The mass ratio of component 1, 1,3,5-tris(4-aminophenyl)benzene and acetic acid in A2 is 10:4-8:200-500.

4. The production process of an anti-interference signal control cable according to claim 1 is characterized in that: The mass ratio of component 2, methanol and sodium borohydride in A3 is 1-1.5:15-30:0.1-0.

2.

5. The production process of an anti-interference signal control cable according to claim 1 is characterized in that: The mass ratio of component three, dichloromethane, 4-aminothiophenol and boron trifluoride ether complex in A4 is 5-8:100-200:3-5:2-4.

6. The production process of an anti-interference signal control cable according to claim 1 is characterized in that: The hydrochloric acid solution in A5 is a 1-2 mol / L hydrochloric acid aqueous solution, and the addition ratio of aniline, ammonium persulfate, hydrochloric acid solution, and component four is 1-5 g: 1-3 g: 50-100 mL: 2.5 g. 7.An anti-interference signal control cable, characterized in that: Made by the production process described in any one of claims 1-6.

Images