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Halogen-free flame-retardant noise suppression sheet and preparation method thereof

A noise suppression sheet, flame retardant technology, applied in the field of composite material manufacturing, can solve the problems of destroying the magnetic powder arrangement, poor absorbing performance, affecting the absorbing performance, etc., to improve surface wettability, good absorbing performance, good The effect of interface combination

Active Publication Date: 2016-04-13
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason why the current commercially available halogen-free and flame-retardant noise suppression sheets have poor microwave absorption performance is that the noise suppression sheets need to be filled with a large amount of halogen-free flame retardants to meet the flame-retardant requirements, which limits the filling amount of magnetic powder and affects In addition, the unevenly dispersed flame retardant particles are easy to agglomerate in the matrix, destroying the arrangement of the magnetic powder in the matrix, providing a channel for the transmission of electromagnetic noise, thereby deteriorating the absorbing performance

Method used

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  • Halogen-free flame-retardant noise suppression sheet and preparation method thereof
  • Halogen-free flame-retardant noise suppression sheet and preparation method thereof
  • Halogen-free flame-retardant noise suppression sheet and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A preparation method of a halogen-free flame-retardant noise suppression sheet, comprising the following steps:

[0037] (1) Select a polymer binder as the matrix, and select a high-loss flake soft magnetic alloy powder as the magnetic powder, wherein the filling amount of the magnetic powder is 6 times the mass of the matrix;

[0038] (2), prepare the modified solution of coupling agent and solvent: join coupling agent in the solvent, the quality of solvent is 10 times of coupling agent;

[0039] (3), flame retardant surface modification: get the modified solution and flame retardant in step (2), the quality of flame retardant is 100 times of coupling agent quality in the solution, mix in proportion, fully stir, bake dry reserve;

[0040] (4), magnetic powder surface modification: get the modified solution and the magnetic powder in the step (2), the quality of the magnetic powder is 100 times of the coupling agent quality in the solution, mix in proportion, fully sti...

Embodiment 2

[0054] A preparation method of a halogen-free flame-retardant noise suppression sheet, comprising the following steps:

[0055] (1) Select a polymer binder as the matrix, and select high-loss flaky soft magnetic alloy powder as the magnetic powder, wherein the filling amount of the magnetic powder is 10 times the mass of the matrix;

[0056] (2), prepare the modified solution of coupling agent and solvent: the coupling agent is added in the solvent, and the quality of the solvent is 5000 times of the coupling agent;

[0057] (3), flame retardant surface modification: get the modified solution and flame retardant in step (2), the quality of flame retardant is 100 times of coupling agent quality in the solution, mix in proportion, fully stir, bake dry standby;

[0058] (4), surface modification of magnetic powder: get the modified solution and magnetic powder in step (2), the quality of magnetic powder is 1000 times of the coupling agent quality in the solution, mix in proporti...

Embodiment 3 and comparative Embodiment 1

[0072] The difference between Example 3 and Example 1 is that: Nitrile rubber, flake Fe-Si-Al magnetic powder and red phosphorus are used as the matrix (binder), flat magnetic powder and flame retardant respectively. Prepare a solution of silane coupling agent (KH-550) and acetone at a ratio of 1:400, add red phosphorus flame retardant to the solution, the mass ratio of red phosphorus to silane coupling agent is 100:0.6, and use an electric mixer After stirring for 1 hour, the mixture was dried in an oven at 40° C. for 2 hours, and collected after all the solvent evaporated for future use. Mix the silane coupling agent (KH-550) and acetone at a ratio of 1:300, add Fe-Si-Al flake magnetic powder into the solution, the mass ratio of the magnetic powder to the silane coupling agent is 100:0.25, and use an electric mixer After stirring for 1 hour, the mixture was dried in an oven at 40° C. for 1.5 hours, and collected after all the solvent evaporated for future use. Put the modif...

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Abstract

The invention discloses a halogen-free flame-retardant noise suppression sheet. The halogen-free flame-retardant noise suppression sheet comprises the following components by mass: 1 g of base body, 6-10 g of magnetic powder, 0.0064-0.11 g of a coupling agent, 0.4-1 g of a flame retardant and 0.01-0.1 g of an auxiliary material. The invention further discloses a preparation method for the halogen-free flame-retardant noise suppression sheet. The halogen-free flame-retardant noise suppression sheet disclosed by the invention has the characteristics of simple preparation process, low preparation cost and environment friendliness as well as flame retardance, wave absorption performance and the like through optimizing the components and the internal structure of the noise suppression sheet.

Description

technical field [0001] The invention belongs to the field of composite material manufacturing, and in particular relates to a halogen-free flame-retardant noise suppression sheet and a preparation method thereof. Background technique [0002] With the rapid development of electronic information technology, electronic products tend to be miniaturized, high-frequency, and highly integrated, and the problems of electromagnetic interference (EMI) and electromagnetic compatibility (EMC) are becoming more and more prominent. Noise suppression sheets can solve the above problems to a certain extent, and are more and more widely used. [0003] Noise suppression sheet is a kind of composite wave-absorbing material with high-molecular material binder as matrix and high-loss flat soft magnetic alloy magnetic powder as filler. The noise suppression (wave absorption) performance is mainly affected by the filling ratio of the magnetic powder and its orderly arrangement in the matrix. ...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08L101/00C08L9/02C08K9/04C08K3/08C08K3/02C08K3/22
CPCC08K3/02C08K3/08C08K3/22C08K3/2279C08K9/04C08K9/06C08K2003/023C08K2003/026C08K2003/0812C08K2003/0856C08K2003/0862C08K2003/2224C08K2003/2227C08L2201/02C08L2201/22C08L21/00C08L101/00C08L9/02
Inventor 刘立东叶怡婷郝斌杜军杰刘克霞
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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