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High-temperature-resistant high-permeability wave absorbing sheet and preparation method thereof

A technology with high magnetic permeability and high temperature resistance, applied in chemical instruments and methods, electronic equipment, other household appliances, etc. The effect of high temperature resistance, high magnetic permeability and excellent high temperature resistance

Inactive Publication Date: 2020-01-10
江门江益磁材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will bring two major challenges. The first is that the electromagnetic interference of electronic equipment is more serious, and the second is that electronic equipment generates more heat and operates at a higher temperature.

Method used

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  • High-temperature-resistant high-permeability wave absorbing sheet and preparation method thereof
  • High-temperature-resistant high-permeability wave absorbing sheet and preparation method thereof
  • High-temperature-resistant high-permeability wave absorbing sheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a high-permeability wave-absorbing sheet with high temperature resistance and a preparation method thereof. The high-permeability wave-absorbing sheet with high temperature resistance of this embodiment comprises the following components by weight:

[0027]

[0028] Among them, the soft magnetic alloy powder is flat FeSiAl, D 50 =50-60μm, sheet thickness below 1μm; binder is nitrile rubber with 41% acrylonitrile content, Mooney viscosity 55-60; vulcanizing agent is brominated phenolic resin; dispersant is pyrophosphate dispersant; organic solvent It is ethyl acetate and butyl acetate, and the mass ratio of ethyl acetate and butyl acetate is 3:2.

[0029] The preparation method of the absorbing sheet of the present embodiment is as follows:

[0030] (1) Mix the components of the above-mentioned wave-absorbing sheet, and use a planetary mixer to stir and disperse at a medium speed, and the stirring time is 2 hours;

[0031] (2) Stir at low s...

Embodiment 2

[0035] This embodiment provides a high-permeability wave-absorbing sheet with high temperature resistance and a preparation method thereof. The high-permeability wave-absorbing sheet with high temperature resistance of this embodiment comprises the following components by weight:

[0036]

[0037] Among them, the soft magnetic alloy powder is flat FeSiAl, D 50 =50-60μm, sheet thickness below 1μm; binder is nitrile rubber with 41% acrylonitrile content, Mooney viscosity 55-60; vulcanizing agent is brominated phenolic resin; dispersant is pyrophosphate dispersant; organic solvent It is ethyl acetate and butyl acetate, and the mass ratio of ethyl acetate and butyl acetate is 3:2.

[0038] The preparation method of the absorbing sheet of the present embodiment is as follows:

[0039] (1) Mix the components of the above-mentioned wave-absorbing sheet, and use a planetary mixer to stir and disperse at a medium speed for 2 hours;

[0040] (2) Stir at low speed and cooperate wit...

Embodiment 3

[0044] This embodiment provides a high-permeability wave-absorbing sheet with high temperature resistance and a preparation method thereof. The high-permeability wave-absorbing sheet with high temperature resistance of this embodiment comprises the following components by weight:

[0045]

[0046] Among them, the soft magnetic alloy powder is flat FeSiAl, D 50 =50-60μm, sheet thickness below 1μm; binder is nitrile rubber with 41% acrylonitrile content, Mooney viscosity 55-60; vulcanizing agent is brominated phenolic resin; dispersant is pyrophosphate dispersant; organic solvent It is ethyl acetate and butyl acetate, and the mass ratio of ethyl acetate and butyl acetate is 3:2.

[0047] The preparation method of the absorbing sheet of the present embodiment is as follows:

[0048] (1) Mix the components of the above-mentioned wave-absorbing sheet, and use a planetary mixer to stir and disperse at a medium speed for 2 hours;

[0049] (2) Stir at low speed and cooperate wit...

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Abstract

The invention discloses a high-temperature-resistant high-permeability wave absorbing sheet and a preparation method thereof. The wave absorbing sheet comprises, by weight, 100 parts of soft magneticalloy powder, 10-20 parts of an adhesive, 0.5-3 parts of a vulcanizing agent, 1-3 parts of a dispersant and 150-200 parts of an organic solvent. The wave absorbing sheet has high magnetic conductivityand high-temperature resistance, can be stably used for at 120 DEG C a long time, and has a longer service life than wave absorbing sheets which can only be used at 80 DEG C in the prior art.

Description

technical field [0001] The invention relates to the field of electromagnetic protection, in particular to a high-temperature-resistant high-permeability wave-absorbing sheet and a preparation method thereof. Background technique [0002] Electronic products represented by smart phones and computers are becoming more and more popular. With the development of small, thin and multi-functional electronic equipment, a large number of electronic components will also be packaged in the circuit substrate. Especially in the 5G era, the integration and signal transmission density of smartphones have been further improved. This will bring two major challenges. The first is that the electromagnetic interference of electronic equipment is more serious, and the second is that electronic equipment generates more heat and operates at a higher temperature. [0003] Electromagnetic wave absorbing materials will become a rigid demand in the future 5G era. It can effectively convert harmful el...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L61/14C08K3/08C08J5/18B32B15/02B32B15/16B32B33/00B32B37/06B32B37/10B32B37/24B32B38/00
CPCB32B5/16B32B5/30B32B15/02B32B15/16B32B33/00B32B37/06B32B37/10B32B37/24B32B2038/0076B32B2255/10B32B2255/205B32B2264/105B32B2264/12B32B2307/212B32B2307/306B32B2457/00C08J5/18C08J2309/02C08J2461/14C08K3/08C08K2201/01
Inventor 李俊李喜雄陈中艳
Owner 江门江益磁材有限公司
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