Flexible anti-aging shielding twisted pair cable and preparation method thereof

Abstract

The invention discloses a flexible anti-aging shielding twisted pair cable and a preparation method thereof. The cable is characterized in that four twisted-pair wire cores and a cross-shaped fillingcore material are twisted together to form a cable core, the exterior of the cable core is coated with a fluororesin wrapping tape layer, an aluminum-plastic composite tape wrapping layer, a copper wire shielding winding layer and a silane grafted crosslinked high-density polyethylene insulating layer, the pair-twisted wire core is formed by pair twisting of two insulating wire cores, each insulating wire core comprises an inner conductor and a silane grafted crosslinked low-density polyethylene insulating layer, a nickel copper damage prevention coating and a zinc oxide barrier layer are sequentially sprayed outside the inner conductor and the copper wire shielding winding layer, the cross-shaped filling core material comprises a cross-shaped resin matrix and an aluminum foil layer, an aluminum-plastic composite belt wrapping layer is of an aluminum-plastic composite belt gap wrapping structure, and the aluminum-plastic composite belt comprises an aluminum foil belt outer layer and aPET resin belt inner layer. The cable is advantaged in that the cable effectively suppresses signal interference caused by crosstalk between the pair-twisted wire cores, can effectively suppress a copper damage phenomenon of an insulating layer, and has better mechanical strength, flexibility and electrical characteristics.

Description

technical field [0001] The invention relates to the technical field of communication cables, in particular to a flexible aging-resistant shielded twisted-pair cable and a preparation method thereof. Background technique [0002] Twisted pair is the most commonly used transmission medium in integrated wiring engineering. It consists of two copper wires with an insulating protective layer, twisted according to a certain pitch, which can reduce the degree of signal interference, and the radio waves radiated by each wire during transmission will be offset by the radio waves emitted by the other wire . Twisted pair is divided into unshielded twisted pair and shielded twisted pair. The shielded wiring system has been recognized by more and more users, and its good performance in electromagnetic compatibility is also being recognized by more users. In addition to polyvinyl chloride, polyolefin is also widely used for the insulating layer of shielded twisted-pair cables. Usually,...

AI Technical Summary

Problems solved by technology

In addition to polyvinyl chloride, polyolefin is also widely used for the insulating layer of shielded twisted-pair cables. Usually, it is made of foamed resin, such as polypropylene. Production

When the cable is formed, each pair of twisted cores is directly contacted and twisted, so that the signal interference caused by the crosstalk between the twisted cores cannot be fully suppressed

Moreover, after the copper conductor and the shielding layer are in direct contact with the insulating layer, copper damage will occur, which will reduce the anti-oxidation performance of the antioxidant in the insulating material, thereby weakening the anti-aging ability of the insulating material. Loss of effectiveness, reduced service life

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