Phase line composite optical cable coating particle and processing method thereof

Abstract

The invention discloses phase line composite optical cable coating particles and a processing method thereof. The phase line composite optical cable coating particles comprise the following raw material components in parts by weight: 50-65 parts of nickel-plated hollow glass microspheres, 20-30 parts of hexagonal boron nitride, 5-10 parts of micron diamond, 3-5 parts of expansible graphite, 4-6 parts of a flame retardant, 1-3 parts of silicon dioxide aerogel, 2-3 parts of hyperbranched polysiloxane and 180-350 parts of a rubber base material. The invention relates to the technical field of phase line composite optical cables. According to the phase line composite optical cable coating particle and the processing method thereof, the nickel-plated hollow glass microspheres are used for constructing a lightweight heat-conducting framework to provide a compression-resistant buffer effect, micron diamond and hexagonal boron nitride are matched for constructing a heat-conducting network to improve the heat dissipation capability, compressive strength and wear resistance, and silicon dioxide aerogel is matched for ensuring good insulation performance; through cooperation of the flame retardant, the expansible graphite and the silicon dioxide aerogel, good flame retardant performance is provided, the interface bonding force with a rubber base material is improved, and the stability and consistency of the performance of coated particles are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phase line composite optical cable, in particular to a phase line composite optical cable coating particle and a processing method thereof. BACKGROUND

[0002] The phase line composite optical cable is OPPC optical cable, which is a special power optical cable. The optical fiber unit is combined in the phase line, and the phase line and communication have dual functions. The OPPC optical cable directly integrates the optical fiber unit into the power phase line, replacing the traditional aluminum-clad steel or aluminum alloy conductor. It is not only a conductor for power transmission, but also a carrier for optical communication. The optical fiber is usually placed in the center or layer-twisted structure, and the outer layer is a conductive material, mainly used in voltage grades below 110kV, suburban distribution networks and rural power grids. It not only needs to have excellent heat dissipation performance to quickly dissipate heat and prevent safety hazards caused by local overheating, but also needs to have excellent insulation performance to ensure the stability and safety of signal transmission. At the same time, the flame retardation and pressure resistance are also important indicators to measure the quality of the cable, especially in special application scenarios such as mining and photovoltaic, the cable needs to withstand extreme environmental tests to ensure the continuous and stable operation of the system.

[0003] However, the cable material of the traditional phase line composite optical cable often cannot meet these high performance requirements at the same time. A single material either has insufficient heat dissipation, leading to heat accumulation, or has poor insulation, affecting signal transmission quality, or has obvious short boards in flame retardation and pressure resistance. Therefore, a new type of cable material with multiple performances of high heat dissipation, insulation, flame retardation and pressure resistance is urgently needed. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a phase line composite optical cable coating particle and a processing method thereof, which solves the problem that a single material either has insufficient heat dissipation, leading to heat accumulation, or has poor insulation, affecting signal transmission quality, or has obvious short boards in flame retardation and pressure resistance.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme: On the one hand A phase line composite optical cable coating particle, the raw material components thereof include, by weight: 58 parts of nickel-plated hollow glass microspheres, 25 parts of hexagonal boron nitride, 8 parts of micron diamond, 4 parts of expandable graphite, 5 parts of flame retardant, 2 parts of silica aerogel, 2 parts of hyperbranched polysiloxane and 235 parts of rubber base material.

[0006] The present application is further provided as follows: the particle size interval of the nickel-plated hollow glass microspheres includes A, B and C, wherein the particle size interval of A is less than 30 microns, the particle size interval of B is 30-80 microns, and the particle size interval of C is 80-120 microns. The A, B and C are in a mass ratio of 15-25:50-60:15-25.

[0007] The application further provides a preparation method of the expandable graphite, which comprises the following steps: The natural flake graphite, concentrated sulfuric acid, nitric acid and potassium permanganate are sequentially taken in a mass ratio of 1:8:1:0.5, stirred at 35 DEG C for 4 hours, and then intercalated compounds are obtained, and then the intercalated compounds are washed with deionized water until the pH value is 6, and then the intercalated compounds are vacuum dried at 80 DEG C for 12 hours, and then the intercalated compounds are heated in a muffle furnace at 900 DEG C for 30 seconds, and then the worm-like expandable graphite is obtained.

[0008] The application further provides a preparation method of the flame retardant, which comprises the following steps: The ammonium polyphosphate, pentaerythritol and melamine are configured in a molar ratio of 3:1:1, and then the mixture is placed in a high-speed mixer and mixed at 2000 rpm for 10 minutes, and then the mixture is heated at 150 DEG C for 2 hours, and then the flame retardant is obtained.

[0009] The application further provides a preparation method of the hyperbranched polysiloxane, which comprises the following steps: The hydrogen-containing polymethylsiloxane and allyl polyether are configured in a molar ratio of 1:1.2, and then 200 ppm of Karstedt catalyst is added, and then the mixture is reacted at 80 DEG C for 3 hours under nitrogen protection, and then the hyperbranched polysiloxane is obtained.

[0010] The application further provides that the rubber base material is one of ethylene-propylene rubber, vinyl silicone rubber and chlorinated polyethylene rubber.

[0011] Another aspect The application further discloses a processing method of phase line composite optical cable coated particles, and specifically comprises the following steps: S1, raw material dispersion: the nickel-plated hollow glass microspheres, hexagonal boron nitride and micron diamond are premixed at 15 rpm for 10 minutes, the expandable graphite, the flame retardant, the silica aerogel and the hyperbranched polysiloxane are continuously mixed for 15 minutes, and then the mixture is obtained; S2, mixing and stirring: the rubber base material is plasticized, and then is placed in a high-speed mixer together with the mixture, and then the mixture is mixed at 60 rpm at 100-140 DEG C for 8-12 minutes; S3, extrusion molding: the mixed material is placed in a double-screw extruder, and then a strip-shaped material is output, wherein the feeding section is at 100 DEG C, the melting section is at 160 DEG C, the metering section is at 150 DEG C, and the die head is at 140 DEG C; S4, granulation: the strip-shaped material is cut at 60 DEG C by using an underwater cutting system, and then is placed in a boiling drying bed and dried at 80 DEG C for 2 hours, and then the coated particles are obtained.

[0012] The application provides a phase line composite optical cable coated particle and a processing method thereof. The application constructs a light-weight heat-conducting framework by using nickel-plated hollow glass microspheres, provides compression resistance and buffering, constructs a heat-conducting network by cooperating with micron diamond and hexagonal boron nitride, can improve heat dissipation capacity, and can improve compression strength and wear resistance of the material, guarantees good insulation performance under cooperation of hexagonal boron nitride, nickel-plated hollow glass microspheres and silica aerogel, provides good flame retardant performance by cooperation of flame retardant, expandable graphite and silica aerogel, improves interfacial adhesion with a rubber base material by cooperation of the arrangement of hyperbranched polysiloxane, and guarantees stability and consistency of the coated particle performance. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0014] The embodiments of the application provide the following technical solutions: Embodiment 1 A phase line composite optical cable coated particle, raw material components thereof include, by weight fraction: 50 parts of nickel-plated hollow glass microspheres, the nickel-plated hollow glass microspheres are prepared by using hollow glass microspheres as carriers and chemically plating nickel-phosphorus alloy thereon, the particle size interval of the nickel-plated hollow glass microspheres includes A type, B type and C type, the particle size interval of the A type is less than 30 microns, the particle size interval of the B type is 30-80 microns, and the particle size interval of the C type is 80-120 microns, and the A type, the B type and the C type are in a mass ratio of 15:60:15; 30 parts of hexagonal boron nitride; 10 parts of micron diamond, the particle size interval of the micron diamond is 1-5 microns; 3 parts of expandable graphite, a preparation method of the expandable graphite is as follows: natural flake graphite, concentrated sulfuric acid, nitric acid and potassium permanganate are sequentially taken in a mass ratio of 1:8:1:0.5, stirring is performed at 35 DEG C for 4 hours, an interlayer compound is obtained, washing is performed with deionized water until pH=6, vacuum drying is performed at 80 DEG C for 12 hours, and then worm-like expandable graphite is obtained by keeping at 900 DEG C in a muffle furnace for 30 seconds; 4 parts of flame retardant, the flame retardant is prepared in the following manner: ammonium polyphosphate, pentaerythritol and melamine are configured in a molar ratio of 3:1:1, placed in a high-speed mixer, mixed at 2000 rpm for 10 minutes, and then kept at 150 DEG C for 2 hours to obtain the flame retardant; 1 part of silica aerogel; Hyperbranched polysiloxane 2 parts, the preparation method of the hyperbranched polysiloxane is: configuring hydrogen-containing polymethylsiloxane and allyl polyether in a molar ratio of 1:1.2, adding 200 ppm of Karstedt catalyst, and reacting at 80℃ for 3h under nitrogen protection to obtain the hyperbranched polysiloxane; Rubber base material 350 parts, ethylene-propylene rubber is selected as the rubber base material.

[0015] A processing method of a phase line composite optical cable coated particle, characterized in that it specifically comprises the following steps: S1, raw material dispersion: mix the nickel-plated hollow glass microspheres, hexagonal boron nitride and micron diamond at 15 rpm for 10 min, add expandable graphite, flame retardant, silica aerogel and hyperbranched polysiloxane and continue mixing for 15 min to obtain a mixture; S2, mixing and stirring: after plasticizing the rubber base material, place it together with the mixture in a high-speed mixer at 120℃ and 60 rpm for 10 min; S3, extrusion molding: place the mixed material in a double screw extruder, and output a strip-shaped material, wherein the feeding section is 100℃, the melting section is 160℃, the metering section is 150℃, and the die head is 140℃; S4, granulation: after cutting the strip-shaped material at 60℃ using an underwater pelletizing system, place it in a boiling drying bed and dry it at 80℃ for 2h to obtain coated particles.

[0016] Example 2 The difference between this example and Example 1 is that a phase line composite optical cable coated particle, the raw material components include: Nickel-plated hollow glass microspheres 58 parts, A, B and C in a mass ratio of 21:55:19; Hexagonal boron nitride 25 parts; Micron diamond 8 parts; Expandable graphite 4 parts; Flame retardant 5 parts; Silica aerogel 2 parts; Hyperbranched polysiloxane 2 parts; Rubber base material 235 parts, vinyl silicone rubber is selected as the rubber base material.

[0017] S2, mixing and stirring: after plasticizing the rubber base material, place it together with the mixture in a high-speed mixer at 100℃ and 60 rpm for 10 min.

[0018] Example 3 The difference between this example and Example 1 is that a phase line composite optical cable coated particle, the raw material components include: Nickel-coated hollow glass microspheres 65 parts, A, B and C in a mass ratio of 25:50:25; Hexagonal boron nitride 20 parts; Micron diamond 5 parts; Expandable graphite 5 parts; Flame retardant 6 parts; Silica aerogel 3 parts; Hyperbranched polysiloxane 3 parts; Rubber base material 180 parts, selected as chlorinated polyethylene rubber as the rubber base material.

[0019] S2, mixing and stirring: after mastication of the rubber base material, it is placed in a high-speed mixer with the mixed material, mixed at 140°C for 10 minutes at 60 rpm.

[0020] Further explanation, hexagonal boron nitride as a two-dimensional thermal conductive filler, the in-plane thermal conductivity can reach 300 W / (m·K), forming a continuous thermal conductive network in the rubber base material, improving the thermal conductivity efficiency of the material, micron diamond as a three-dimensional thermal conductive node, connecting the two-dimensional thermal conductive network formed by hexagonal boron nitride, further improving the longitudinal thermal conductivity efficiency of the material, so that the heat can be quickly conducted out from the inside of the cable, and the nickel-coated hollow glass microspheres enhance the thermal conduction path, which together guarantees the excellent thermal conductivity of the coated particles.

[0021] Further explanation, hexagonal boron nitride has excellent insulation performance, its high resistivity and low dielectric loss effectively guarantee the stability and safety of signal transmission, and the insulation performance of nickel-coated hollow glass microspheres is also excellent, and the silica aerogel has extremely low dielectric constant and dielectric loss, which further improves the insulation performance of the material, which together guarantees the good insulation performance of the coated particles.

[0022] Further explanation, the flame retardant decomposes to produce phosphoric acid substances when heated, catalyzing carbon to form a dense carbon layer, effectively blocking the transfer of heat and oxygen, and the expandable graphite expands to form a worm-like thermal conduction path when heated, and the generated expanded carbon layer acts as a physical barrier layer, which synergistically enhances the flame retardant grade of the material, and the silica aerogel itself has excellent thermal stability and can maintain structural stability at high temperatures, further enhancing the flame retardant performance of the material, which together guarantees the excellent flame retardant performance of the coated particles.

[0023] Further explanation, the nickel-coated hollow glass microspheres have a low density of only 0.1-0.6 g / cm 3 , and the compressive strength can reach more than 35 MPa, effectively improving the compressive performance of the material, while reducing the overall density of the material, and the high hardness of micron diamond enhances the wear resistance and compressive strength of the material, enabling the cable to withstand greater external pressure without deformation, which together guarantees the excellent compressive performance of the coated particles.

[0024] Simulation experiment In order to test the use performance of the coated particles, the thermal conductivity, insulation, flame retardancy and pressure resistance are tested by taking PVC cable, PE cable, PP cable and XLPE cable as comparative references, wherein the thermal conductivity is tested by using a laser thermal conductivity instrument according to ASTM E1461 and ISO 22007 standards, the insulation is tested by using a high resistance meter method according to GB / T 1410 and ASTM D257 standards, taking volume resistivity as the evaluation standard, the flame retardancy is evaluated by using an oxygen index method (GB / T 2406) and a smoke density rating method (ISO 5660), and the pressure resistance is tested by using a universal testing machine method according to GB / T 1041 and ASTM D695 standards, and the test results are shown in Table 1: Table 1 As shown in Table 1, the coated particles provided by the application are superior to common PVC, PE, PP and XLPE cable materials in terms of thermal conductivity and pressure resistance, and the insulation is superior to PVC, PP and XLPE cable materials, and secondly, in terms of flame retardant performance, the oxygen index of the coated particles provided by the application can reach 45%, and the smoke density rating is low during combustion, and the flame retardant performance is superior to common PVC, PE, PP and XLPE cable materials.

[0025] Although the embodiments of the application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A phase line composite optical cable coating particle, characterized in that: The raw material components include, by weight, 50-65 parts of nickel-plated hollow glass microspheres, 20-30 parts of hexagonal boron nitride, 5-10 parts of micron diamonds, 3-5 parts of expandable graphite, 4-6 parts of flame retardant, 1-3 parts of silicon dioxide aerogel, 2-3 parts of hyperbranched polysiloxane and 180-350 parts of rubber base material.

2. The phase line composite optical cable coating particles according to claim 1, characterized in that: The raw material components include, by weight, 50 parts of nickel-plated hollow glass microspheres, 30 parts of hexagonal boron nitride, 10 parts of micron diamond, 3 parts of expandable graphite, 4 parts of flame retardant, 1 part of silica aerogel, 2 parts of hyperbranched polysiloxane and 350 parts of rubber base material.

3. The phase line composite optical cable coating particles according to claim 1, characterized in that: The raw material components include, by weight, 58 parts of nickel-plated hollow glass microspheres, 25 parts of hexagonal boron nitride, 8 parts of micron diamond, 4 parts of expandable graphite, 5 parts of flame retardant, 2 parts of silica aerogel, 2 parts of hyperbranched polysiloxane and 235 parts of rubber base material.

4. The phase line composite optical cable coating particles according to claim 1, characterized in that: The raw material components include, by weight, 65 parts of nickel-plated hollow glass microspheres, 20 parts of hexagonal boron nitride, 5 parts of micron diamond, 5 parts of expandable graphite, 6 parts of flame retardant, 3 parts of silica aerogel, 3 parts of hyperbranched polysiloxane and 180 parts of rubber base material.

5. The phase line composite optical cable coating particles according to claim 1, characterized in that: The particle size ranges of the nickel-plated hollow glass microspheres include Class A, Class B and Class C, wherein the Class A particle size range is less than 30 μm, the Class B particle size range is 30-80 μm, and the Class C particle size range is 80-120 μm; The mass ratio of Class A, Class B and Class C is: 15-25:50-60:15-25.

6. The phase line composite optical cable coating particles according to claim 1, characterized in that: The preparation method of the expandable graphite comprises: Natural flake graphite, concentrated sulfuric acid, nitric acid and potassium permanganate were weighed in sequence in a mass ratio of 1:8:1:0.5, stirred at 35°C for 4 hours to obtain an intercalation compound, washed with deionized water to pH = 6, vacuum dried at 80°C for 12 hours, and then kept in a muffle furnace at 900°C for 30 seconds to obtain worm-like expandable graphite.

7. The phase line composite optical cable coating particles according to claim 1, characterized in that: The preparation method of the flame retardant comprises: Ammonium polyphosphate, pentaerythritol and melamine were prepared in a molar ratio of 3:1:1, placed in a high-speed mixer, mixed at 2000 rpm for 10 minutes, and then kept at 150° C. for 2 hours to obtain a flame retardant.

8. The phase line composite optical cable coating particles according to claim 1, characterized in that: The preparation method of the hyperbranched polysiloxane comprises: Hydrogenated polymethylsiloxane and allyl polyether were prepared in a molar ratio of 1:1.2, 200 ppm of Karstedt catalyst was added, and the mixture was reacted at 80° C. for 3 h under nitrogen protection to obtain hyperbranched polysiloxane.

9. The phase line composite optical cable coating particles according to claim 1, characterized in that: The rubber base material is one of ethylene propylene rubber, vinyl silicone rubber and chlorinated polyethylene rubber.

10. A method for processing phase line composite optical cable coating particles, characterized in that: The specific steps include: S1. Raw material dispersion: nickel-plated hollow glass microspheres, hexagonal boron nitride, and microdiamond were premixed at 15 rpm for 10 min, expandable graphite, flame retardant, silica aerogel, and hyperbranched polysiloxane were added, and mixing was continued for 15 min to obtain a mixture; S2. Mixing and stirring: After plasticizing the rubber base material, place it together with the mixed material in a high-speed mixer and mix at 60 rpm at 100-140°C for 8-12 minutes; S3, extrusion molding: the mixed material is placed in a twin-screw extruder to output strip material, wherein the feeding section is 100 ° C, the melting section is 160 ° C, the metering section is 150 ° C, and the head is 140 ° C; S4. Granulation: After the strip material is cut by an underwater pelletizing system at 60°C, it is placed on a boiling drying bed and dried at 80°C for 2 hours to obtain coated particles.

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