Electromagnetic shielding composite material

A composite material, electromagnetic shielding technology, applied in shielding materials, magnetic/electric field shielding, electrical components, etc., can solve the problems of low shielding efficiency and insufficient designability, and achieve excellent performance, improve shielding efficiency, and good shielding performance. Effect

Inactive Publication Date: 2016-05-04
WUHAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

However, the shielding function of the unit has low s

Method used

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  • Electromagnetic shielding composite material
  • Electromagnetic shielding composite material

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Embodiment Construction

[0023] The following examples further illustrate the technical solutions of the present invention, but are not intended to limit the protection scope of the present invention.

[0024] The electromagnetic shielding composite material is alternately stacked with electromagnetic wave absorbing layers and electromagnetic wave reflecting layers from the surface to the inside; a layer of electromagnetic wave absorbing layer and a layer of electromagnetic wave reflecting layer below constitute a shielding unit; refer to the attached figure 1 shown.

[0025] The electromagnetic wave absorbing layer (1a, 2a, 3a, 4a) is made of matrix resin, fiber carrier and electromagnetic absorbing functional body; the electromagnetic wave reflecting layer (1r, 2r, 3r, 4r) is made of matrix resin and electromagnetic reflecting functional body ; The electromagnetic reflective function body is a mixed mat mixed with chopped carbon fiber and chopped glass fiber; wherein, the mass percentage of chopped ...

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Abstract

The invention discloses an electromagnetic shielding composite material. Electromagnetic wave absorption layers and electromagnetic wave reflection layers are alternately overlapped to form electromagnetic shielding function bodies; the electromagnetic wave absorption layers are formed by compositing matrix resin, fiber carriers and electromagnetic absorption function bodies; the electromagnetic wave absorption layers are formed by compositing matrix resin and electromagnetic gradient reflection function bodies; in the overlapped electromagnetic wave reflection layers, the mass percentage compositions of short cut carbon fibers increase in gradient along the incident directions of the electromagnetic waves. According to the electromagnetic shielding composite material of the invention, the incident electromagnetic waves generate multi-reflection; the propagation paths of the electromagnetic waves in the material are increased; increase of the multi-reflection loss and absorption loss enables the shielding efficiency of the material to be increased; in adoption of the reflection layers of gradient structure, the electromagnetic waves will not escape away from the shielding material rapidly for reflection; more electromagnetic waves can enter the next shielding unit; therefore, the shielding efficiency of the material is further improved.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to an electromagnetic shielding composite material. Background technique [0002] Traditional electromagnetic shielding materials mostly use metal and its alloy sheets, thin sheets, thin strips, thin nets and other materials. The above-mentioned traditional shielding materials consume more metal resources, consume a lot of energy for processing, and have high costs. As the metal corrodes, the shielding effectiveness decreases. The designability of shielding effectiveness is also poor. The shielding mechanism is mainly reflection, which is not conducive to reducing electromagnetic pollution. It has poor applicability in many places that require higher shielding effectiveness. [0003] The research and development of electromagnetic shielding composite materials has attracted more and more people's attention, and new shielding materials have emerged in an endless strea...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/0088H05K9/009
Inventor 王钧陈润华杨小利
Owner WUHAN UNIV OF TECH
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