Flexible category-7 Ethernet cable and preparation process thereof

Abstract

The invention discloses a flexible category-7 Ethernet cable and a preparation process thereof. The pair twisting pitches of the four cable cores are 19.8mm, 11.2mm, 16.8mm and 14.4mm respectively. The cabling pitches of the four cable cores are 87+ / -2mm. The pitch differences of the adjacent cable cores are 8.6mm, 5.6mm, 5.4mm and 2.4mm respectively. The pitch differences of the opposite cable cores are 3mm and 3.2mm respectively. The pitches of the four cable cores have maximum common multiple and are controlled at 4, 5, 6 and 7 times of the outer diameter of pair twisting in order to reducecrosstalk, and have minimum pitch difference in order to reduce delay. In addition, the pitch difference between the adjacent cable cores is maximized, and the pitch difference between the opposite cable cores is minimized, so as to ensure the transmission performance of the Ethernet cable. Two wire cores are pair-twisted and then wrapped with an aluminum-plastic composite tape or longitudinal wrapped with sub shields. It is required that the thickness of the aluminum base in the aluminum-plastic composite tape should not be less than 0.04 mm. The attenuation and crosstalk indexes of the cable are reduced.

Description

Technical field [0001] The invention relates to a flexible type 7 Ethernet cable and a preparation process thereof, which is suitable for use in environments such as relatively closed high-speed and ultra-high-speed rail transit vehicles or rail transit platforms with concentrated personnel. Background technique [0002] In recent years, as a representative of "Made in China", China's rail transit equipment has continuously made breakthroughs in the international market, completing the process from digestion and absorption to re-innovation, from the initial export of accessories to the export of complete vehicles. The rapid development of rail transit in my country is inseparable from the technological improvement of our country, especially the improvement of independent research and development capabilities. At the same time, it also puts forward higher requirements for Ethernet cables for rail transit vehicles, from data cables to CAT 5 and CAT 5e. Up to now, the transmission fr...

AI Technical Summary

Problems solved by technology

As people's requirements for data transmission are getting higher and higher, the existing technology uses a single bare copper conductor structure, which cannot meet the flexible requirements of rail transit equipment, and for the stranded wire conductor structure containing plating, the existing technology Technical tolerance structural design can not meet the requirements of end customers

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