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Electromagnetic shielding cable and preparation method thereof

An electromagnetic shielding and electrostatic shielding technology, which is applied in the direction of cable/conductor manufacturing, insulated cables, cables, etc., can solve the problems affecting the reflection, absorption and guidance of electromagnetic energy flow, poor continuity and ductility, poor anti-interference and shielding effects, etc. problems, to achieve the effect of avoiding the transmission of internal signals, avoiding mutual interference, and high grounding reliability

Pending Publication Date: 2019-02-26
EAST CHINA NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

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

Method used

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  • Electromagnetic shielding cable and preparation method thereof
  • Electromagnetic shielding cable and preparation method thereof

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Embodiment Construction

[0016] See attached Figure 1~Figure 2 , the present invention is composed of an electrostatic shielding layer 2, a polyimide base layer 3, an electromagnetic shielding metal layer 4, a copper mesh layer 5 and a sheath 6 arranged in sequence outside the core wire 1, and the electrostatic shielding layer 2 is provided with an electromagnetic shielding The metal layer 4 and the copper mesh layer 5 are integrated double metal shielding structure, the electromagnetic shielding metal layer 4 is a silver film arranged on the polyimide base layer 3; the copper mesh layer 5 is a double helix copper sheet wound on the The metal shielding mesh on the electromagnetic shielding metal layer 4 ; the sheath 6 is a protective layer arranged outside the copper mesh layer 5 .

[0017] See attached figure 1 , the specific preparation of the present invention is carried out according to the following steps:

[0018] Step a: Wrap the electrostatic shielding layer 2 made of plastic material aroun...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/22H01B13/22
CPCH01B7/1875H01B7/225H01B13/22
Inventor 万尚尚张健李佳黄淳康玲朱旦荣
Owner EAST CHINA NORMAL UNIV
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