High-temperature and high-frequency foam fluorine plastic coaxial cable and production method thereof

Abstract

The invention discloses a high-temperature and high-frequency foam fluorine plastic coaxial cable and a production method thereof, which relate to the technical field of coaxial cables and aim at improving the humidity resistance and enhancing the wear resistance and the mechanical strength of an insulating layer. The coaxial cable comprises a cable core conductor, a PTFE (Polytetrafluoroethylene) winding layer, a metal screen layer and a protective jacket in sequence from the inside to the outside. The coaxial cable is characterized in that a PFA (Polytetrafluoroethylene) layer is arranged between the cable core conductor and the PTFE winding layer or another PFA layer is arranged between the PTFE winding layer and the metal screen layer, or two PFA layers are respectively arranged between the cable core conductor and the PTFE winding layer and between the PTFE winding layer and the metal screen layer. The coaxial cable has the advantages of favorable humidity resistance, high power transmission performance and high wear resistance and mechanical strength of the insulating layer.

Description

technical field [0001] The invention relates to the technology of coaxial cables, in particular to the technology of a high-temperature and high-frequency foamed fluoroplastic coaxial cable and its manufacturing method. Background technique [0002] The structure of the existing coaxial cable is a cable core conductor, an insulating layer, a metal shielding layer and a sheath from the inside to the outside; the insulating layer is usually wrapped with PTFE, because the PTFE foam insulation material is a fiber structure, so Its moisture-proof performance is poor, and water molecules can easily penetrate into the pores between the fibers and contact the cable core conductor, which will lead to the increase of local capacitance, oxidation of the cable core conductor, etc. In addition, because the corrugated outer peripheral surface of the PTFE wrapping layer will affect the electrical transmission performance of the cable, and the PTFE wrapping layer is easily deformed under ex...

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Problems solved by technology

[0002] The structure of the existing coaxial cable is a cable core conductor, an insulating layer, a metal shielding layer and a sheath from the inside to the outside; the insulating layer is usually wrapped with PTFE, because the PTFE foam insulation material is a fiber structure, so Its moisture-proof performance is poor, and water molecules can easily penetrate into the pores between the fibers and contact the cable core conductor, which will lead to the increase of local capacitance, oxidation of the cable core conductor, etc. In addition, because the corrugated outer peripheral surface of the PTFE wrapping layer will affect the electrical transmission performance of the cable, and the PTFE wrapping layer is easily deformed under external pressure, its wear resistance and mechanical strength are also relatively low. Difference

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