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CN-121983378-A - Radio frequency cable for fireproof wireless communication and preparation method thereof

CN121983378ACN 121983378 ACN121983378 ACN 121983378ACN-121983378-A

Abstract

The application belongs to the technical field of cable sheath materials, and particularly discloses a radio frequency cable for fireproof wireless communication and a preparation method thereof. The radio-frequency cable for fireproof wireless communication comprises, by weight, 50-60 parts of nitrile rubber, 22-25 parts of acrylate rubber, 13-16 parts of chlorinated polyethylene, 2-3 parts of a silane coupling agent, 17-19 parts of a composite reinforcing material, 1-2 parts of dioctyl sebacate, 1-3 parts of an antioxidant 1010, 5-8 parts of POE-g-GMA, 3-5 parts of a flame retardant and 2-4 parts of calcium stearate, wherein the composite reinforcing material consists of silicon carbide composite, glass composite fibers and titanium dioxide. The application obtains the durable weather-proof flame-retardant outer sheath, which is suitable for normal work in daily use and severe environment.

Inventors

  • WAN JIANGUO
  • QIAN HUA
  • WU BIN
  • Jiang Zhehong

Assignees

  • 杭州普天乐电缆有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (10)

  1. 1. The radio-frequency cable for the fireproof wireless communication is characterized by comprising, by weight, 50-60 parts of nitrile rubber, 22-25 parts of acrylate rubber, 13-16 parts of chlorinated polyethylene, 2-3 parts of a silane coupling agent, 17-19 parts of a composite reinforcing material, 1-2 parts of dioctyl sebacate, 1-3 parts of an antioxidant 1010, 5-8 parts of POE-g-GMA, 3-5 parts of a flame retardant and 2-4 parts of calcium stearate, wherein the composite reinforcing material consists of a silicon carbide compound, glass composite fibers and titanium dioxide.
  2. 2. The radio frequency cable for fire-resistant wireless communication according to claim 1, wherein the silicon carbide composite is composed of silicon carbide, tung oil anhydride and modified micro-nano cellulose whiskers in a mass ratio of 1:0.2-0.4:0.1-0.3.
  3. 3. The radio frequency cable for fireproof wireless communication according to claim 2, wherein the preparation method of the modified micro-nano cellulose whisker comprises the following steps of dispersing the micro-nano cellulose whisker into deionized water, adding ethanol and a silane coupling agent kh570, stirring for 1-2h at the temperature of 45-50 ℃, drying, crushing, mixing with nano calcium carbonate and polylactic acid, and grinding to obtain the micro-nano cellulose whisker.
  4. 4. The radio frequency cable for fireproof wireless communication according to claim 3, wherein the nano calcium carbonate is pretreated by dispersing nano calcium carbonate in deionized water, adding sodium stearate, and heating at 170-180 ℃ for 2-3h to obtain pretreated nano calcium carbonate, wherein the particle size of the nano calcium carbonate is 100-150nm and 500-600nm.
  5. 5. The radio frequency cable for fire-resistant wireless communication according to claim 1, wherein the preparation method of the glass composite fiber comprises the following steps: Dispersing the silicon dioxide compound, isopropanol and glass fiber in deionized water, heating for 2-3h under reflux at 90-95 ℃, drying, dispersing into N-methyl pyrrolidone solution, adding gallic acid, stirring for 2-3h at 50-55 ℃, and drying to obtain the glass composite fiber.
  6. 6. The radio-frequency cable for fire-resistant wireless communication according to claim 5, wherein the mass ratio of the glass fiber, the silicon dioxide compound and the gallic acid is 1:0.63-0.71:1.2-1.5.
  7. 7. The radio frequency cable for fire resistant wireless communication of claim 5, wherein the preparation of the silica composite comprises the following steps: Uniformly mixing silicon dioxide, xylitol, sodium dodecyl benzene sulfonate and deionized water to obtain a mixture; uniformly mixing the aqueous polyurethane, the modified starch, the paraffin and the emulsifier, adding the mixture, and spray-drying to obtain the silicon dioxide compound.
  8. 8. The radio-frequency cable for fireproof wireless communication according to claim 1, wherein the copper strip embossing layer is longitudinally wrapped copper strip embossing, the thickness of the copper strip is 0.6-1.0mm, the embossing depth is 1.5-2.5mm, and the pitch is 4.5-5.5mm.
  9. 9. The radio frequency cable for fire resistant wireless communication of claim 1, wherein the high temperature resistant layer is a mica tape.
  10. 10. The method for preparing a radio frequency cable for fire-resistant wireless communication according to claim 1, comprising the steps of: Plasticating nitrile rubber, acrylic rubber and chlorinated polyethylene at 130-140 ℃, adding a composite reinforcing material, a silane coupling agent, a flame retardant, calcium stearate, dioctyl sebacate and an antioxidant 1010, mixing at 130-140 ℃ to obtain master batch, adding POE-g-GMA, final smelting at 90-95 ℃, discharging sheets, cooling, and preparing an adhesive tape for later use; The method comprises the steps of using an extruder to uniformly extrude a layer of ceramic fiber insulating material outside a copper core conductor, longitudinally wrapping a copper strip outside an insulating wire core, rolling concave-convex grains through a embossing machine, wrapping a layer of ceramic non-woven fabric layer, overlapping wrapping by adopting a galvanized steel strip to obtain a steel strip wrapping layer, tightly wrapping a high temperature resistant layer outside the steel strip wrapping layer to obtain a high temperature resistant layer, placing the prepared adhesive tape in the extruder, extruding, wrapping the high temperature resistant layer, and vulcanizing to obtain a finished product.

Description

Radio frequency cable for fireproof wireless communication and preparation method thereof Technical Field The application relates to the technical field of cable sheath materials, in particular to a radio frequency cable for fireproof wireless communication and a preparation method thereof. Background The fire threatens the communication cable greatly, and the communication network is widely distributed in all corners of cities, such as places of high-rise buildings, subways, data centers and the like. Once a fire disaster occurs, the common communication cable can be rapidly destroyed due to the characteristics of inflammability, low temperature resistance and the like, so that the communication is interrupted, and a fire protection system, emergency lighting, communication equipment and the like cannot normally operate. Under the scene of fire, the interruption of information transmission can seriously influence works such as fire control command and dispatch, personnel emergency rescue communication, public warning and help seeking, for example, in high-rise building fires, firefighters rely on the communication system to mutually cooperate for rescue, communication cable damage can make command information unable to transmit, delay rescue opportunity. On the other hand, in order to ensure public safety and reliability of the communication system, communication enterprises need fireproof communication cables with better performance in order to meet requirements and avoid serious accident liabilities caused by communication interruption. The radio frequency fireproof cable can use a standard radio frequency connector as an emergency communication cable, and other colors are used for marking the appearance, so that the radio frequency fireproof cable can help all workers engaged in indoor wiring of a building to realize quick identification. Currently, indoor flame-retardant cables are generally wrapped with metal bushings or fire-resistant materials, and these additional protective measures increase the size, weight and cost of the cable, and the bending radius of the cable is also increased, resulting in more difficult, time-consuming, labor-consuming and expensive installation. Current construction of radio frequency fire resistant cables generally comprises an inner conductor, an insulating layer, a shielding layer, a jacket, which in addition to being fire resistant also requires excellent mechanical properties, being able to withstand damage from harsh environments, such as frictional losses with other surfaces during installation, towing or long term vibrations. Disclosure of Invention In order to solve the problems of poor mechanical property and poor wear resistance of the sheath, the application provides a radio frequency cable for fireproof wireless communication and a preparation method thereof. The application provides a radio frequency cable for fireproof wireless communication, which adopts the following technical scheme: The radio-frequency cable for the fireproof wireless communication comprises, by weight, 50-60 parts of nitrile rubber, 22-25 parts of acrylate rubber, 13-16 parts of chlorinated polyethylene, 2-3 parts of a silane coupling agent, 17-19 parts of a composite reinforcing material, 1-2 parts of dioctyl sebacate, 1-3 parts of an antioxidant 1010, 5-8 parts of POE-g-GMA, 3-5 parts of a flame retardant and 2-4 parts of calcium stearate, wherein the composite reinforcing material consists of silicon carbide composite, glass composite fibers and titanium dioxide. By adopting the technical scheme, the copper core conductor is responsible for transmitting radio frequency signals, and the ceramic fiber insulating layer is not burnt and melted at high temperature, so that the structural integrity can be maintained, the insulation between conductors is ensured, and the signal transmission can be maintained even in a fire disaster. The copper strip embossing layer is used as a shielding layer, and the embossing design increases the flexibility of the cable. The second fireproof barrier of the ceramic non-woven fabric layer further enhances the whole fireproof heat-insulating capacity and plays roles of wrapping and buffering. The steel strip is wrapped around the cladding to provide mechanical protection and additional shielding effectiveness. The cable jacket is the outermost layer of protection, providing the daily durability of the cable. The high temperature resistant layer is exposed to high temperature after the outer layer is ablated, provides mechanical support and heat insulation for the internal structure and is the first physical barrier against impact and vibration. In the cable sheath material, the nitrile rubber provides excellent oil resistance, wear resistance, air tightness and good mechanical strength, and the acrylate rubber and the nitrile rubber have good compatibility, excellent heat resistance, ozone resistance and ultraviolet resistance, so that the aging performa