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Wave-absorbing plate for electromagnetic shielding

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

Active Publication Date: 2015-09-09
SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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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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  • Wave-absorbing plate for electromagnetic shielding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~4

[0034] Embodiments 1 to 4: a wave absorbing sheet for electromagnetic shielding, comprising a graphite sheet 1 as a reflective layer, a wave absorbing layer 2 and a release material layer 3, and a second layer is arranged between the graphite sheet 1 and the wave absorbing layer 2. an adhesive layer 4; a second adhesive layer 5 is arranged between the wave-absorbing layer 2 and the release material layer 3;

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

[0036] Table 1

[0037] Example 1 Example 2 Example 3 Example 4 Absorber powder 100 copies 100 copies 100 copies 100 copies Butyl acrylate 20 servings 32 servings 30 servings 28 servings acrylic acid 10 servings 15 servings 18 servings 20 servings Isooctyl Acrylate 25 servings 22 servings 32 servings 35 servings methyl methacrylate 18 servings 26 servings 12 servings 28 servings Vinyl acetate 1 ...

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Abstract

The invention discloses a wave-absorbing plate for electromagnetic shielding. The wave-absorbing plate comprises graphite flake used as a reflecting layer, a wave-absorbing layer and a release material layer. A first adhesive layer is arranged between the graphite flake and the wave-absorbing layer. A second adhesive layer is disposed between the wave-absorbing layer and the release material layer. The wave-absorbing layer is composed of the following ingredients: a wave-absorbing powder, butyl acrylate, acrylic acid, 2-ethylhexyl acrylate, methyl methacrylate, vinyl acetate, methacrylic acid-2-hydroxyl ethyl, sodium polyacrylat and methylethyl ketone peroxide. The wave-absorbing powder is composed of the following ingredients: BaFe12O19, nickel sesquioxide, nano-graphite powder, cobalt naphtenate, unsaturated polyester and an acrylic leveling agent. Attenuation rate of the wave-absorbing plate reaches 88% at 2-10 GHz of electromagnetic wave, thus being beneficial to gluing of a polymer and uniform dispersing of mixed powders in the polymer. Therefore, reliability of electromagnetic property is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates 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, the development of absorbing materials that can weaken electromagnetic radiation has become a hot topic in materials science. [0003] Absorbers refer to a class of materials that can effectively absorb incident electromagnetic waves and attenuate them. They convert incident electromagnetic waves into heat or oth...

Claims

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Application Information

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Patent Type & Authority Applications(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 SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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