阅读说明：本技术 一种新型超薄绝缘环保型特种通信电缆的制造方法 (Manufacturing method of novel ultrathin insulating environment-friendly special communication cable ) 是由 宰学龙 周俊 朱元忠 陈安鹏 郑斌 高美玲 陶恒莹 朱道进 于 2021-08-03 设计创作，主要内容包括：本发明属于电缆制造技术领域,尤其是一种新型超薄绝缘环保型特种通信电缆的制造方法,解决了现有技术中通信电缆不能满足特种行业的需要,在极端环境下不能够正常工作,很容易发生损坏等问题,所述新型超薄绝缘环保型特种通信电缆的制造方法,包括以下步骤：将镀锌铜线和镀锡铜线绞合得导体；将改性聚氯乙烯塑料挤出后拉伸包覆导体形成线芯；将硅锗合金网包覆线芯后,再用辐照交联无卤高阻燃聚烯烃材料挤包形成绝缘层；将改性硅橡胶挤包在绝缘层外,形成外护套即得。本发明电缆柔软性好,耐弯曲,具有良好的阻燃性、防水性、耐蚀性、耐老化性和抗氧化性,可广泛应用于恶劣、苛刻的环境中,大大延长通信电缆的使用稳定性和使用寿命。(The invention belongs to the technical field of cable manufacturing, in particular to a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which solves the problems that the communication cable in the prior art can not meet the requirements of special industries, can not normally work under extreme environments, is easy to damage and the like, and comprises the following steps: stranding a galvanized copper wire and a tinned copper wire to obtain a conductor; extruding the modified polyvinyl chloride plastic, and stretching the coated conductor to form a wire core; after the silicon-germanium alloy net wraps the wire core, an irradiation cross-linking halogen-free high-flame-retardant polyolefin material is used for extrusion wrapping to form an insulating layer; and extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath. The cable has the advantages of good flexibility, bending resistance, good flame retardance, waterproofness, corrosion resistance, aging resistance and oxidation resistance, can be widely applied to severe and harsh environments, and greatly prolongs the service stability and the service life of the communication cable.)

1. A manufacturing method of a novel ultrathin insulation environment-friendly special communication cable is characterized by comprising the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.25-0.45mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing modified polyvinyl chloride plastic, extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape which is matched with the cable conductor and has the thickness of 3-5mm, and further stretching the pipe shape to tightly coat the conductor to form a wire core;

s3, after wrapping the wire core by using a silicon-germanium alloy net with the thickness of 1-1.5mm, directly extruding and wrapping the irradiation cross-linking halogen-free high-flame-retardant polyolefin material on the wire core wrapped by the silicon-germanium alloy net to form an insulating layer with a compact structure;

and S4, finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, and thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

2. The manufacturing method of the novel ultrathin environment-friendly communication cable as claimed in claim 1, wherein the modified polyvinyl chloride plastic in the step S2 comprises the following raw materials in parts by weight: 70-90 parts of polyvinyl chloride, 38-45 parts of ethylene-vinyl acetate copolymer, 20-30 parts of modified glass fiber, 3-5 parts of zinc borate, 3-5 parts of acetyl tributyl citrate and 28-38 parts of isopropanol.

3. The manufacturing method of the novel ultrathin environment-friendly insulated special communication cable as claimed in claim 2, wherein the modified glass fiber is prepared by the following steps: (1) adding glass fiber into 23-28% hydrochloric acid water solution according to a material-to-solution ratio of 1:1.5-2.5, heating to 55-65 deg.C, ultrasonically dispersing for 5-10min, standing for 20-30min, filtering, washing with water to neutrality, and oven drying; (2) adding the dried glass fiber treated in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1-1.2:0.3-0.5, premixing for 3-5min at the temperature of 95-105 ℃, adding 4-dimethylaminopyridine and muscovite powder, ultrasonically dispersing for 10-20min, filtering, cleaning and drying to obtain the modified glass fiber.

4. The manufacturing method of the novel ultrathin environment-friendly insulated special communication cable as claimed in claim 3, wherein the addition amount of 4-dimethylaminopyridine in the step (2) is 4-7% of the total amount of the glass fiber treated and dried in the step (1), and the addition amount of muscovite powder is 68-75% of the total amount of the glass fiber treated and dried in the step (1).

5. The manufacturing method of the novel ultrathin insulating environment-friendly special communication cable as claimed in claim 2, characterized in that the preparation method of the modified polyvinyl chloride plastic is as follows: (1) dispersing the modified glass fiber in isopropanol at 50-70 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 10-20min to obtain a mixed solution; (2) and (2) adding polyvinyl chloride, the ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 5-10min to obtain the modified polyvinyl chloride plastic.

6. The method for manufacturing a novel ultra-thin insulated environment-friendly special communication cable according to claim 1, wherein the stretching conditions in step S2 are specifically as follows: the stretching temperature is 118-124 ℃, the stretching speed is 15-22mm/min, and the stretching ratio is 4-8 times.

7. The method for manufacturing a novel ultra-thin insulating environment-friendly special communication cable according to claim 1, wherein the irradiation cross-linking halogen-free high flame retardant polyolefin material in step S3 is prepared by blending 60-70 parts by weight of polyethylene, 20-30 parts by weight of polymethyl methacrylate, 2-4 parts by weight of zinc borate, 12-18 parts by weight of nano magnesium hydroxide, 4-7 parts by weight of paraffin-based white oil, 1-3 parts by weight of hydroxyphenylpropionamide benzoic acid and 1-3 parts by weight of dioctyl sebacate uniformly, extruding, and finally performing irradiation processing and thermal extension to obtain the irradiation cross-linking halogen-free high flame retardant polyolefin material.

8. The manufacturing method of the novel ultrathin environment-friendly communication cable as claimed in claim 7, wherein the irradiation processing specifically refers to: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂And irradiating the wire for 10-20min at the irradiation dose rate of 10kGy/h in the atmosphere.

9. The method as claimed in claim 1, wherein the modified silicone rubber in step S4 is prepared by mixing 58-65 parts by weight of silicone rubber, 32-40 parts by weight of thermoplastic polyurethane elastomer, 16-20 parts by weight of modifier, 4-5 parts by weight of dibutyl sebacate, 1-3 parts by weight of L-aminopropionic acid and 1-3 parts by weight of ethylene glycol butyl ether acetate, and banburying.

10. The manufacturing method of the novel ultrathin environment-friendly insulated special communication cable as claimed in claim 9, wherein the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 5-7:1-2: 6-9.

Technical Field

The invention relates to the technical field of cable manufacturing, in particular to a manufacturing method of a novel ultrathin insulation environment-friendly special communication cable.

Background

The electric wire and cable is an indispensable basic equipment for transmitting electric energy, transmitting information and manufacturing equipment such as various motors, electric appliances, instruments, automobiles, machine tools and the like, and is a necessary basic product in the electrification and information-based society.

With the development of communication technology, the wireless mobile communication has the following development trend: (1) The communication method is developed towards a higher frequency direction, the application frequency range is changed from a 50-150M Hz frequency range to a 450-1800M Hz frequency range, and the communication capacity is larger; (2) the development is towards high-quality lines: digital transmission, high code rate transmission; (3) towards urban and confined areas where population density is relatively concentrated: such as tunnels, semi-buried highways, underground parking lots, mines, etc.

The special communication cable is required to transmit signals in a special environment, and generally, the use condition and the environment are harsh and harsh, the weather condition is variable, the change of landform is abnormal, and the special communication cable comprises a marsh wetland, a hard rocky land or a desert and the like. Most of the existing communication cables cannot meet the requirements of special industries due to the problems of materials, structures or manufacturing processes, are poor in waterproof, corrosion-resistant, folding-resistant, twisting-resistant, pulling-resistant, pressing-resistant and the like, cannot normally work in extreme environments, are easy to damage, and have the problems of signal transmission distortion, unsmooth signal transmission and the like due to the unstable working condition. Based on the above statement, the invention provides a manufacturing method of a novel ultrathin insulation environment-friendly special communication cable.

Disclosure of Invention

The invention aims to solve the problems that the communication cable in the prior art cannot meet the requirements of special industries due to the problems of materials, structures or manufacturing processes, is poor in waterproof, corrosion-resistant, folding-resistant, twisting-resistant, pulling-resistant, pressing-resistant and the like, cannot normally work in extreme environments, is easy to damage, and has the problems of distortion of signal transmission, unsmooth signal transmission and the like due to unstable work.

A manufacturing method of a novel ultrathin insulating environment-friendly special communication cable comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.25-0.45mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing modified polyvinyl chloride plastic, extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape which is matched with the cable conductor and has the thickness of 3-5mm, and further stretching the pipe shape to tightly coat the conductor to form a wire core;

s3, after wrapping the wire core by using a silicon-germanium alloy net with the thickness of 1-1.5mm, directly extruding and wrapping the irradiation cross-linking halogen-free high-flame-retardant polyolefin material on the wire core wrapped by the silicon-germanium alloy net to form an insulating layer with a compact structure;

and S4, finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, and thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

Preferably, the modified polyvinyl chloride plastic in step S2 includes the following raw materials in parts by weight: 70-90 parts of polyvinyl chloride, 38-45 parts of ethylene-vinyl acetate copolymer, 20-30 parts of modified glass fiber, 3-5 parts of zinc borate, 3-5 parts of acetyl tributyl citrate and 28-38 parts of isopropanol.

Preferably, the modified glass fiber is prepared by the following method: (1) adding glass fiber into 23-28% hydrochloric acid water solution according to a material-to-solution ratio of 1:1.5-2.5, heating to 55-65 deg.C, ultrasonically dispersing for 5-10min, standing for 20-30min, filtering, washing with water to neutrality, and oven drying; (2) adding the dried glass fiber treated in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1-1.2:0.3-0.5, premixing for 3-5min at the temperature of 95-105 ℃, adding 4-dimethylaminopyridine and muscovite powder, ultrasonically dispersing for 10-20min, filtering, cleaning and drying to obtain the modified glass fiber.

Preferably, the adding amount of the 4-dimethylaminopyridine in the step (2) is 4-7% of the total amount of the glass fiber treated and dried in the step (1), and the adding amount of the muscovite powder is 68-75% of the total amount of the glass fiber treated and dried in the step (1).

Preferably, the preparation method of the modified polyvinyl chloride plastic comprises the following steps: (1) dispersing the modified glass fiber in isopropanol at 50-70 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 10-20min to obtain a mixed solution; (2) and (2) adding polyvinyl chloride, the ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 5-10min to obtain the modified polyvinyl chloride plastic.

Preferably, the stretching conditions in step S2 are specifically: the stretching temperature is 118-124 ℃, the stretching speed is 15-22mm/min, and the stretching ratio is 4-8 times.

Preferably, in the step S3, the irradiation cross-linking halogen-free high flame retardant polyolefin material is prepared by uniformly blending 60-70 parts by weight of polyethylene, 20-30 parts by weight of polymethyl methacrylate, 2-4 parts by weight of zinc borate, 12-18 parts by weight of nano magnesium hydroxide, 4-7 parts by weight of paraffin-based white oil, 1-3 parts by weight of hydroxyphenylpropionamide benzoic acid and 1-3 parts by weight of dioctyl sebacate, extruding, and finally performing irradiation processing and thermal extension to obtain the irradiation cross-linking halogen-free high flame retardant polyolefin material.

Preferably, the irradiation processing specifically refers to: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂And irradiating the wire for 10-20min at the irradiation dose rate of 10kGy/h in the atmosphere.

Preferably, the modified silicone rubber in step S4 is prepared by mixing and banburying 58-65 parts by weight of silicone rubber, 32-40 parts by weight of thermoplastic polyurethane elastomer, 16-20 parts by weight of modifier, 4-5 parts by weight of dibutyl sebacate, 1-3 parts by weight of L-aminopropionic acid and 1-3 parts by weight of butyl cellosolve acetate.

Preferably, the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 5-7:1-2: 6-9.

The manufacturing method of the novel ultrathin insulating environment-friendly special communication cable provided by the invention has the following beneficial effects:

1. the invention uses the twisted and compacted tinned copper wires and galvanized copper wires as the conductor of the communication cable, adopts the process of extrusion forming and drawing to coat the modified polyvinyl chloride material on the periphery of the conductor to form a wire core, and then sequentially coats a silicon germanium alloy net, an extruded insulating layer and a sheath layer to prepare the required novel ultrathin insulating environment-friendly special communication cable; the preparation method is simple, and the problems of core deviation of the polyvinyl chloride layer and abrasion and scratching of the wire core in the production process are effectively avoided by adopting a conductor coating process which is stretched after extrusion forming; the communication cable obtained by the invention has good flexibility, bending resistance, good flame retardance, waterproofness, corrosion resistance, aging resistance and oxidation resistance, can be widely applied to severe and harsh environments, particularly high-humidity, high-heat or high-cold areas, and greatly prolongs the service stability and the service life of the communication cable.

2. The invention modifies the glass fiber, greatly improves the enhanced toughness, improves the wear resistance and the dispersibility, and then mixes the glass fiber with the polyvinyl chloride, the ethylene-vinyl acetate copolymer, the zinc borate, the acetyl tributyl citrate and the isopropanol to prepare the modified polyvinyl chloride, and the obtained modified polyvinyl chloride has high mechanical strength, impact resistance, flame retardance, wear resistance, heat insulation and good corrosion resistance.

3. According to the invention, the silicon germanium alloy net is used for wrapping the wire core, and then the wire core is wrapped with the irradiation crosslinking halogen-free high-flame-retardant polyolefin material to form the insulating layer, so that the electric field on the outer surface of the wire core is effectively ensured to be uniform, and meanwhile, different effects of good buffering, shielding, heat insulation, oil resistance, cold resistance, flame retardance, cracking resistance and the like are achieved.

4. The modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol, and the modifier is mixed and banburied with silicone rubber, a thermoplastic polyurethane elastomer, the modifier, dibutyl sebacate, L-aminopropionic acid and ethylene glycol butyl ether acetate to prepare the modified silicone rubber which has good mechanical property, high heat resistance, cold resistance, durability and stability; the modified silicon rubber has certain improved waterproof, corrosion resistant, folding, twisting, pulling, pressing and other performances.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Example one

The invention provides a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.25mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing a wire core:

weighing 70 parts of polyvinyl chloride, 38 parts of ethylene-vinyl acetate copolymer, 20 parts of modified glass fiber, 3 parts of zinc borate, 3 parts of acetyl tributyl citrate and 28 parts of isopropanol for later use, wherein the modified glass fiber is prepared by the following method: (1) adding glass fiber into 23% hydrochloric acid water solution according to a material-to-liquid ratio of 1:1.5, heating to 55 ℃, performing ultrasonic dispersion for 5min, performing heat preservation and standing treatment for 20min, filtering, washing with water to neutrality, and drying; (2) adding the dried glass fiber treated in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1:0.3, premixing for 3min at the temperature of 95 ℃, adding 4-dimethylaminopyridine accounting for 4% of the total amount of the dried glass fiber treated in the step (1) and muscovite powder accounting for 68% of the total amount of the dried glass fiber treated in the step (1), and performing ultrasonic dispersion for 10min, filtering, cleaning and drying to obtain the modified glass fiber;

preparing modified polyvinyl chloride plastic: (1) dispersing modified glass fiber in isopropanol at 50 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 10min to obtain a mixed solution; (2) adding polyvinyl chloride, ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 5min to obtain modified polyvinyl chloride plastic;

extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape which is matched with the cable conductor and has the thickness of 3mm, and further stretching the pipe shape to tightly coat the cable conductor to form a wire core, wherein the stretching temperature is 118 ℃, the stretching speed is 15mm/min, and the stretching multiple is 4 times;

s3, extruding an insulating layer:

uniformly blending 60 parts by weight of polyethylene, 20 parts by weight of polymethyl methacrylate, 2 parts by weight of zinc borate, 12 parts by weight of nano magnesium hydroxide, 4 parts by weight of paraffin-based white oil, 1 part by weight of hydroxyphenylpropionamide benzoic acid and 1 part by weight of dioctyl sebacate, extruding, and finally carrying out irradiation processing and thermal extension to obtain the irradiation crosslinking halogen-free high-strength polyethylene terephthalateThe flame-retardant polyolefin material is characterized in that the irradiation processing specifically refers to the following steps: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂In the atmosphere, irradiating the wire for 10min at the irradiation dose rate of 10 kGy/h;

after a silicon germanium alloy net with the thickness of 1mm is used for wrapping the wire core, the irradiation cross-linking halogen-free high-flame-retardant polyolefin material is directly extruded and wrapped on the wire core wrapped by the silicon germanium alloy net to form an insulating layer with a compact structure;

s4, extruding an outer sheath:

mixing and banburying 58 parts by weight of silicone rubber, 32 parts by weight of thermoplastic polyurethane elastomer, 16 parts by weight of modifier, 4 parts by weight of dibutyl sebacate, 1 part by weight of L-aminopropionic acid and 1 part by weight of ethylene glycol butyl ether acetate to prepare modified silicone rubber, wherein the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 5:1: 6;

and finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

Example two

The invention provides a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.35mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing a wire core:

weighing 80 parts of polyvinyl chloride, 42 parts of ethylene-vinyl acetate copolymer, 25 parts of modified glass fiber, 4 parts of zinc borate, 4 parts of acetyl tributyl citrate and 33 parts of isopropanol for later use, wherein the modified glass fiber is prepared by the following method: (1) adding glass fiber into 25% hydrochloric acid water solution according to the material-to-liquid ratio of 1:2, heating to 60 ℃, performing ultrasonic dispersion for 8min, then performing heat preservation and standing for 25min, filtering, washing with water to be neutral, and drying; (2) adding the glass fiber treated and dried in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1.1:0.4, premixing for 4min at the temperature of 100 ℃, adding 4-dimethylaminopyridine accounting for 5.5% of the total amount of the glass fiber treated and dried in the step (1) and 72% of muscovite powder, and carrying out ultrasonic dispersion for 15min, filtering, cleaning and drying to obtain the modified glass fiber;

preparing modified polyvinyl chloride plastic: (1) dispersing the modified glass fiber in isopropanol at the temperature of 60 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 15min to obtain a mixed solution; (2) adding polyvinyl chloride, ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 8min to obtain modified polyvinyl chloride plastic;

extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape with the thickness of 4mm matched with the cable conductor, and further stretching the pipe shape to tightly coat the conductor to form a wire core, wherein the stretching temperature is 121 ℃, the stretching speed is 18mm/min, and the stretching multiple is 6 times;

s3, extruding an insulating layer:

uniformly blending 65 parts by weight of polyethylene, 25 parts by weight of polymethyl methacrylate, 3 parts by weight of zinc borate, 15 parts by weight of nano magnesium hydroxide, 5.5 parts by weight of paraffin-based white oil, 2 parts by weight of hydroxyphenylpropionamide benzoic acid and 2 parts by weight of dioctyl sebacate, extruding, and finally carrying out irradiation processing and thermal extension to obtain the irradiation crosslinking halogen-free high-flame-retardant polyolefin material, wherein the irradiation processing specifically refers to: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂Irradiating the wire for 15min at the irradiation dose rate of 10kGy/h in the atmosphere;

after a silicon germanium alloy net with the thickness of 1.2mm is used for wrapping the wire core, the irradiation cross-linking halogen-free high-flame-retardant polyolefin material is directly extruded and wrapped on the wire core wrapped by the silicon germanium alloy net to form an insulating layer with a compact structure;

s4, extruding an outer sheath:

mixing and banburying 62 parts by weight of silicone rubber, 36 parts by weight of thermoplastic polyurethane elastomer, 18 parts by weight of modifier, 4.5 parts by weight of dibutyl sebacate, 2 parts by weight of L-aminopropionic acid and 2 parts by weight of ethylene glycol butyl ether acetate to prepare modified silicone rubber, wherein the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 6:1.5: 7.5;

and finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

EXAMPLE III

The invention provides a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.45mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing a wire core:

weighing 90 parts of polyvinyl chloride, 45 parts of ethylene-vinyl acetate copolymer, 30 parts of modified glass fiber, 5 parts of zinc borate, 5 parts of acetyl tributyl citrate and 38 parts of isopropanol for later use, wherein the modified glass fiber is prepared by the following method: (1) adding glass fiber into 28% hydrochloric acid water solution according to the material-to-liquid ratio of 1:2.5, heating to 65 ℃, performing ultrasonic dispersion for 10min, then performing heat preservation and standing treatment for 30min, filtering, washing with water to be neutral, and drying; (2) adding the glass fiber treated and dried in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1.2:0.5, premixing for 5min at 105 ℃, adding 4-dimethylaminopyridine accounting for 7% of the total amount of the glass fiber treated and dried in the step (1) and muscovite powder accounting for 75% of the total amount of the glass fiber treated and dried in the step (1), and performing ultrasonic dispersion for 20min, filtering, cleaning and drying to obtain the modified glass fiber;

preparing modified polyvinyl chloride plastic: (1) dispersing the modified glass fiber in isopropanol at the temperature of 70 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 20min to obtain a mixed solution; (2) adding polyvinyl chloride, ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 10min to obtain modified polyvinyl chloride plastic;

extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape which is matched with the cable conductor and has the thickness of 5mm, and further stretching the pipe shape to tightly coat the cable conductor to form a wire core, wherein the stretching temperature is 124 ℃, the stretching speed is 22mm/min, and the stretching multiple is 8 times;

s3, extruding an insulating layer:

uniformly blending 70 parts by weight of polyethylene, 30 parts by weight of polymethyl methacrylate, 4 parts by weight of zinc borate, 18 parts by weight of nano magnesium hydroxide, 7 parts by weight of paraffin-based white oil, 3 parts by weight of hydroxyphenylpropionamide benzoic acid and 3 parts by weight of dioctyl sebacate, extruding, and finally carrying out irradiation processing and thermal extension to obtain the irradiation crosslinking halogen-free high-flame-retardant polyolefin material, wherein the irradiation processing specifically comprises the following steps: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂Irradiating the wire for 20min at the irradiation dose rate of 10kGy/h in the atmosphere;

after a silicon germanium alloy net with the thickness of 1.5mm is used for wrapping the wire core, the irradiation cross-linking halogen-free high-flame-retardant polyolefin material is directly extruded and wrapped on the wire core wrapped by the silicon germanium alloy net to form an insulating layer with a compact structure;

s4, extruding an outer sheath:

mixing and banburying 65 parts by weight of silicone rubber, 40 parts by weight of thermoplastic polyurethane elastomer, 20 parts by weight of modifier, 5 parts by weight of dibutyl sebacate, 3 parts by weight of L-aminopropionic acid and 3 parts by weight of ethylene glycol butyl ether acetate to prepare modified silicone rubber, wherein the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 7:2: 9;

and finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

Comparative example 1

The invention provides a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.25mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing a wire core:

weighing 70 parts of polyvinyl chloride, 38 parts of ethylene-vinyl acetate copolymer, 20 parts of glass fiber, 3 parts of zinc borate, 3 parts of acetyl tributyl citrate and 28 parts of isopropanol for later use;

preparing modified polyvinyl chloride plastic: (1) dispersing glass fiber in isopropanol at 50 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 10min to obtain a mixed solution; (2) adding polyvinyl chloride, ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 5min to obtain modified polyvinyl chloride plastic;

extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape which is matched with the cable conductor and has the thickness of 3mm, and further stretching the pipe shape to tightly coat the cable conductor to form a wire core, wherein the stretching temperature is 118 ℃, the stretching speed is 15mm/min, and the stretching multiple is 4 times;

s3, extruding an insulating layer:

uniformly blending 60 parts by weight of polyethylene, 20 parts by weight of polymethyl methacrylate, 2 parts by weight of zinc borate, 12 parts by weight of nano magnesium hydroxide, 4 parts by weight of paraffin-based white oil, 1 part by weight of hydroxyphenylpropionamide benzoic acid and 1 part by weight of dioctyl sebacate, extruding, and finally carrying out irradiation processing and thermal extension to obtain the irradiation crosslinking halogen-free high-flame-retardant polyolefin material, wherein the irradiation processing specifically comprises the following steps: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂In the atmosphere, irradiating the wire for 10min at the irradiation dose rate of 10 kGy/h;

after a silicon germanium alloy net with the thickness of 1mm is used for wrapping the wire core, the irradiation cross-linking halogen-free high-flame-retardant polyolefin material is directly extruded and wrapped on the wire core wrapped by the silicon germanium alloy net to form an insulating layer with a compact structure;

s4, extruding an outer sheath:

mixing and banburying 58 parts by weight of silicone rubber, 32 parts by weight of thermoplastic polyurethane elastomer, 16 parts by weight of modifier, 4 parts by weight of dibutyl sebacate, 1 part by weight of L-aminopropionic acid and 1 part by weight of ethylene glycol butyl ether acetate to prepare modified silicone rubber, wherein the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 5:1: 6;

and finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

Comparative example No. two

The invention provides a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.25mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing a wire core:

weighing 70 parts of polyvinyl chloride, 38 parts of ethylene-vinyl acetate copolymer, 20 parts of modified glass fiber, 3 parts of zinc borate, 3 parts of acetyl tributyl citrate and 28 parts of isopropanol for later use, wherein the modified glass fiber is prepared by the following method: (1) adding glass fiber into 23% hydrochloric acid water solution according to a material-to-liquid ratio of 1:1.5, heating to 55 ℃, performing ultrasonic dispersion for 5min, performing heat preservation and standing treatment for 20min, filtering, washing with water to neutrality, and drying; (2) adding the dried glass fiber treated in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1:0.3, premixing for 3min at the temperature of 95 ℃, adding 4-dimethylaminopyridine accounting for 4% of the total amount of the dried glass fiber treated in the step (1) and muscovite powder accounting for 68% of the total amount of the dried glass fiber treated in the step (1), and performing ultrasonic dispersion for 10min, filtering, cleaning and drying to obtain the modified glass fiber;

preparing modified polyvinyl chloride plastic: (1) dispersing modified glass fiber in isopropanol at 50 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 10min to obtain a mixed solution; (2) adding polyvinyl chloride, ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 5min to obtain modified polyvinyl chloride plastic;

extruding and wrapping the modified polyvinyl chloride plastic outside a cable conductor to form a wire core;

s3, extruding an insulating layer:

uniformly blending 60 parts by weight of polyethylene, 20 parts by weight of polymethyl methacrylate, 2 parts by weight of zinc borate, 12 parts by weight of nano magnesium hydroxide, 4 parts by weight of paraffin-based white oil, 1 part by weight of hydroxyphenylpropionamide benzoic acid and 1 part by weight of dioctyl sebacate, extruding, and finally carrying out irradiation processing and thermal extension to obtain the irradiation crosslinking halogen-free high-flame-retardant polyolefin material, wherein the irradiation processing specifically comprises the following steps: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂In the atmosphere, irradiating the wire for 10min at the irradiation dose rate of 10 kGy/h;

after a silicon germanium alloy net with the thickness of 1mm is used for wrapping the wire core, the irradiation cross-linking halogen-free high-flame-retardant polyolefin material is directly extruded and wrapped on the wire core wrapped by the silicon germanium alloy net to form an insulating layer with a compact structure;

s4, extruding an outer sheath:

mixing and banburying 58 parts by weight of silicone rubber, 32 parts by weight of thermoplastic polyurethane elastomer, 16 parts by weight of modifier, 4 parts by weight of dibutyl sebacate, 1 part by weight of L-aminopropionic acid and 1 part by weight of ethylene glycol butyl ether acetate to prepare modified silicone rubber, wherein the modifier is prepared by compounding octadecyl acrylate, 3- (methacryloyloxy) propyl trimethoxy silane and polyethylene glycol in a mass ratio of 5:1: 6;

and finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

Comparative example No. three

The invention provides a manufacturing method of a novel ultrathin insulating environment-friendly special communication cable, which comprises the following steps:

s1, respectively selecting 5 galvanized copper wires and 5 tinned copper wires with the diameters of 0.25mm, sequentially arranging the galvanized copper wires and the tinned copper wires at intervals, and twisting and compacting the galvanized copper wires and the tinned copper wires to obtain a cable conductor;

s2, preparing a wire core:

weighing 70 parts of polyvinyl chloride, 38 parts of ethylene-vinyl acetate copolymer, 20 parts of modified glass fiber, 3 parts of zinc borate, 3 parts of acetyl tributyl citrate and 28 parts of isopropanol for later use, wherein the modified glass fiber is prepared by the following method: (1) adding glass fiber into 23% hydrochloric acid water solution according to a material-to-liquid ratio of 1:1.5, heating to 55 ℃, performing ultrasonic dispersion for 5min, performing heat preservation and standing treatment for 20min, filtering, washing with water to neutrality, and drying; (2) adding the dried glass fiber treated in the step (1), N-dimethylacetamide and butyl stearate into an ultrasonic dispersion machine together according to the mass ratio of 1:1:0.3, premixing for 3min at the temperature of 95 ℃, adding 4-dimethylaminopyridine accounting for 4% of the total amount of the dried glass fiber treated in the step (1) and muscovite powder accounting for 68% of the total amount of the dried glass fiber treated in the step (1), and performing ultrasonic dispersion for 10min, filtering, cleaning and drying to obtain the modified glass fiber;

preparing modified polyvinyl chloride plastic: (1) dispersing modified glass fiber in isopropanol at 50 ℃, adding acetyl tributyl citrate and zinc borate, and stirring for 10min to obtain a mixed solution; (2) adding polyvinyl chloride, ethylene-vinyl acetate copolymer and the mixture obtained in the step (1) into an internal mixer, and mixing and internally mixing for 5min to obtain modified polyvinyl chloride plastic;

extruding the modified polyvinyl chloride plastic to preliminarily form a pipe shape which is matched with the cable conductor and has the thickness of 3mm, and further stretching the pipe shape to tightly coat the cable conductor to form a wire core, wherein the stretching temperature is 118 ℃, the stretching speed is 15mm/min, and the stretching multiple is 4 times;

s3, extruding an insulating layer:

uniformly blending 60 parts by weight of polyethylene, 20 parts by weight of polymethyl methacrylate, 2 parts by weight of zinc borate, 12 parts by weight of nano magnesium hydroxide, 4 parts by weight of paraffin-based white oil, 1 part by weight of hydroxyphenylpropionamide benzoic acid and 1 part by weight of dioctyl sebacate, extruding, and finally carrying out irradiation processing and thermal extension to obtain the irradiation crosslinking halogen-free high-flame-retardant polyolefin material, wherein the irradiation processing specifically comprises the following steps: by gamma⁶⁰C_OThe source strength is 3.7 multiplied by 10¹⁵Radiation source of Bq, at room temperature, N₂In the atmosphere, irradiating the wire for 10min at the irradiation dose rate of 10 kGy/h;

after a silicon germanium alloy net with the thickness of 1mm is used for wrapping the wire core, the irradiation cross-linking halogen-free high-flame-retardant polyolefin material is directly extruded and wrapped on the wire core wrapped by the silicon germanium alloy net to form an insulating layer with a compact structure;

s4, extruding an outer sheath:

mixing and banburying 58 parts by weight of silicone rubber, 32 parts by weight of thermoplastic polyurethane elastomer, 16 parts by weight of modifier, 4 parts by weight of dibutyl sebacate, 1 part by weight of L-aminopropionic acid and 1 part by weight of ethylene glycol butyl ether acetate to prepare modified silicone rubber, wherein the modifier is octadecyl acrylate;

and finally, extruding and wrapping the modified silicon rubber outside the insulating layer to form an outer sheath with a compact structure, thus obtaining the required novel ultrathin insulating environment-friendly special communication cable.

And (3) performance testing:

the special communication cables prepared in the first third embodiment of the invention and the first third comparative embodiments are subjected to performance tests, and the detection results are as follows:

note: abrasion conditions: CS17 round, 1000 g/round, 5000r/m 23 ℃.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.