Coaxial cable and production process thereof

Abstract

The invention discloses a coaxial cable and a production process thereof, and aims to provide a coaxial cable which is prevented from being damped easily and has stable transmission quality and high electric performance, and a production process thereof. The coaxial cable comprises an inner conductor (1), an outer conductor (3), an outer jacket (4) and a combined insulating layer, wherein the combined insulating layer comprises an inner thin layer (21), a foamed insulating layer (22) and an outer thin layer (23); the inner thin layer (21), the foamed insulating layer (22) and the outer thin layer (23) are sequentially coated at the periphery of the inner conductor (1) from inside to outside; the outer conductor body (3) is arranged at the periphery of the outer thin layer (23); and the outer jacket (4) is coated outside the outer conductor (4). The invention can be widely applied to the fields of coaxial cables and production thereof.

Description

Technical field [0001] The invention relates to a coaxial cable and its production process. Background technique [0002] The existing aluminum-plastic composite tape-type outer conductor coaxial cable uses a single foamed insulation layer for its insulation layer. In practical applications, due to its structural defects and imperfect production process, the product has the following shortcomings: [0003] 1. Poor moisture resistance: (1) A single foamed insulating layer is directly squeezed onto the inner conductor, and its adhesion is poor. During the production and construction process, the cable will bend, straighten and straighten the inner conductor. There is a gap between the conductor and the foamed insulating layer, which is easy to enter the moisture and cause the surface of the inner conductor to oxidize. (2) The insulator adopts a single foamed insulation layer, which is easy to enter the water and be damp. In the process of outsourcing the physical foamed insulation l...

AI Technical Summary

Problems solved by technology

[0004] 2. When the aluminum-plastic composite tape enters the longitudinal wrapping process, and its metal face faces outward, after passing through the longitudinal wrapping mold, the longitudinal scratches on the surface are serious

[0005] 3. Poor electrical performance: due to the entry of moisture, although the insulation resistance value can barely meet the corresponding standard requirements (≥5000MΩ.Km), it is low and the use is extremely unstable

[0006] 4. Narrow transmission frequency band: The existing coaxial cable has a narrow transmission frequency and poor shielding performance due to factors such as the thickness of the aluminum base of the aluminum-plastic composite tape is 0.1mm, and scratches on the metal surface. The shielding attenuation of the 5MHz frequency is about 90dB

[0007] 5. Poor stability and reliability. Because it is easy to be affected by moisture, the conductor will be oxidized, and the insulation resistance value is low, resulting in poor stability and reliability of the transmission line.

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