Electromagnetic shielding cable and preparation method thereof

Abstract

The invention discloses an electromagnetic shielding cable and a preparation method thereof. The cable is characterized in that a double metal shielding structure in which an electromagnetic shieldingmetal layer and a copper mesh layer are integrated is arranged outside an electrostatic shielding layer; the copper mesh layer is a metal shielding net, and double-spiral copper sheet are wound on the electromagnetic shielding metal layer; and the electromagnetic shielding metal layer is a dense silver film which is formed by silver nanoparticles which grow on a polyimide base layer in agglomeration through a redox chemical process. The specific preparation method comprises the steps of polyimide solution configuration, polyimide curing and ring opening and silver ion reduction. Compared withthe prior art, the cable provided by the invention has the advantages of simple structure, convenient processing, light weight and good electromagnetic protection effect. Internal signal transmissionis greatly prevented from outside electromagnetic interference. The performance of electromagnetic wave shielding of the cable is further improved.

Description

technical field [0001] The invention relates to the technical field of cable manufacturing, in particular to an electromagnetic shielding cable with a double-metal protection layer combined with a copper mesh and a silver layer and a preparation method thereof. Background technique [0002] Electromagnetic compatibility is to add a metal shielding layer outside the ordinary unshielded wiring system, and use the reflection, absorption and skin effect of the metal shielding layer to realize the function of preventing electromagnetic interference and electromagnetic radiation. The shielding system comprehensively utilizes the balance principle of twisted pair wires And the shielding effect of the shielding layer, so it has very good electromagnetic compatibility characteristics. For good electromagnetic shielding, the entire surface of the shielding body must be conductive and continuous, and the other is that there must be no conductors that directly penetrate the shielding bod...

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Problems solved by technology

[0003] The shielding layer of cables in the prior art is generally braided copper mesh or copper foil (aluminum) with poor surface continuity and ductility. There are many conductive discontinuities on the shielding body, especially the non-conductive gaps formed at the joints of different parts. It greatly affects the reflection, absorption and guidance of electromagnetic energy flow, and the anti-interference and shielding effect is poor

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