High-temperature resistant fire-retardant co-axial cable

Abstract

The invention relates to a high-temperature resistant fire-retardant co-axial cable. The cable comprises, from the inside to the outside, a central conductor, an irradiation crosslinking foaming fire-retardant polyethylene insulation layer, a copper foil shielding layer, a copper wire weaving outer conductor layer and an outer protection layer, wherein PE base materials, together with a proper amount of fire-retardant masterbatch and nucleating agent, undergo foaming extrusion in a physical foaming machine to make insulation core wires, the foaming fire-retardant polyethylene insulation layer prepared by the insulation core wires is irradiated by an electron accelerator, the high-voltage electron beam current generated by the electron accelerator acts on the foaming fire-retardant polyethylene insulation layer, the internal structure of the foaming fire-retardant polyethylene insulation layer is changed from the original chain-shaped macromolecular structure to the three-dimensional network structure, so that the crosslinked foaming fire-retardant polyethylene insulation layer possesses better physical properties, an work at the temperature of 125 DEG C for a long time, and has the advantages of fire-retardant property, high voltage resistance, high weathering resistance, high mechanical property, high transmission property and the like.

Description

Technical field: [0001] The invention relates to a coaxial cable for communication, especially a coaxial cable which can work at 125°C for a long time and has flame-retardant properties. Background technique: [0002] With the continuous advancement of technology, the communication frequency band continues to expand, the supported rate is getting higher and higher, and the heat resistance and flame resistance are getting higher and higher. The traditional physical foaming technology can solve the problem of transmission rate very well, but due to The temperature resistance range of foamed polyethylene is between -20 and 80°C. When the cable is used in the high-frequency band, the transmission performance of the cable is greatly reduced due to the heating of the cable itself, and the heat resistance and flame retardancy are poor; traditional fluoroplastics are used Insulation has good heat resistance and flame retardancy, but it is difficult to increase the transmission rate ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous advancement of technology, the communication frequency band continues to expand, the supported rate is getting higher and higher, and the heat resistance and flame resistance are getting higher and higher. The traditional physical foaming technology can solve the problem of transmission rate very well, but due to The temperature resistance range of foamed polyethylene is between -20 and 80°C. When the cable is used in the high-frequency band, the transmission performance of the cable is greatly reduced due to the heating of the cable itself, and the heat resistance and flame retardancy are poor; traditional fluoroplastics are used Insulation has good heat resistance and flame retardancy, but it is difficult to increase the transmission rate and the material is expensive

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