Electromagnetic shielding absorber

A technology of electromagnetic shielding and wave plate, applied in the direction of magnetic/electric field shielding, electrical components, radiation-absorbing coatings, etc., can solve problems such as human health hazards, electromagnetic interference, abnormal work, etc., to improve wave-absorbing performance and ensure reliability , The effect of improving the service life of the product

Active Publication Date: 2017-10-27
JIANGSU SIDIKE NEW MATERIALS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electromagnetic waves released by electronic products will cause electromagnetic interference to other electronic devices around them, making them work abnormally; at the same time, they will also cause harm to human health

Method used

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  • Electromagnetic shielding absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~4

[0034] Embodiment 1~4: A kind of wave-absorbing sheet for electromagnetic shielding, comprises graphite sheet 1, wave-absorbing layer 2 and release material layer 3 as reflective layer, is provided with the 2nd between described graphite sheet 1, wave-absorbing layer 2 An adhesive layer 4; a second adhesive layer 5 is arranged between the absorbing layer 2 and the release material layer 3;

[0035] The components and contents of the absorbing layer 2 are as shown in Table 1:

[0036] Table 1

[0037]

Example 1

Example 2

Example 3

Example 4

Absorbing powder

100 copies

100 copies

100 copies

100 copies

Butyl acrylate

20 copies

32 copies

30 copies

28 copies

acrylic acid

10 copies

15 copies

18 copies

20 copies

Isooctyl acrylate

25 copies

22 copies

32 copies

35 copies

Methyl methacrylate

18 copies

26 copies

12 copies

28 copies

Vinyl aceta...

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Abstract

The invention discloses a wave-absorbing sheet for electromagnetic shielding, comprising a graphite sheet as a reflective layer, a wave-absorbing layer and a release material layer, a first adhesive layer is arranged between the graphite sheet and the wave-absorbing layer; the absorbing A second adhesive layer is arranged between the wave layer and the release material layer; the wave-absorbing layer is composed of the following components: wave-absorbing powder, butyl acrylate, acrylic acid, isooctyl acrylate, methyl methacrylate, Vinyl acetate, 2-hydroxyethyl methacrylate, sodium polyacrylate, methyl ethyl ketone peroxide; the absorbing powder is composed of the following components: BaFe12O19, nickel oxide, nano-graphite powder, cobalt naphthenate, unsaturated Polyester, acrylic leveling agent. The wave-absorbing patch of the present invention has an attenuation rate of 88% in 2-10 GHz electromagnetic waves, which is not only beneficial to polymer adhesion, but also makes the mixed powder evenly dispersed in the polymer, thereby ensuring the reliability of electromagnetic properties.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, in particular to a wave-absorbing sheet for electromagnetic shielding. Background technique [0002] With the development of the electronics industry, more and more electronic and electrical products have entered people's lives, and the electromagnetic radiation brought by these products has an increasing impact on the environment. The electromagnetic waves released by electronic products will bring electromagnetic interference to other electronic devices around, making them work abnormally; at the same time, they will also cause harm to human health. Therefore, research and development of absorbing materials that can weaken electromagnetic radiation has become a hot topic in materials science. [0003] Absorbing materials refer to a class of materials that can effectively absorb incident electromagnetic waves and attenuate them. It converts incident electromagnetic waves into heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09D4/02C09D4/00C09D5/32C09J7/20
CPCC08L33/066C09K5/14H05K9/0088B32B7/06B32B7/12B32B9/007B32B9/04B32B9/048B32B33/00C09K3/00C08K2003/2293C08K2201/011C08L2205/035C09J2433/006C09J2433/00C09J2400/10C09J2301/16C09J2301/122C08L67/06C08L33/02C08K13/02C08K3/22C08K3/04C08K5/098B32B7/00H05K9/00C09J7/20
Inventor 金闯杨晓明
Owner JIANGSU SIDIKE NEW MATERIALS SCI & TECH CO LTD
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