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Method for preparing wave absorbing material

A technology of wave-absorbing materials and absorbents, which is applied in the field of preparation of electromagnetic noise suppression sheets, can solve the problems of large volume of wave-absorbing materials and difficulty in popularization and application, and achieve the effects of reducing volume, expanding the applicable range, and improving stability

Inactive Publication Date: 2019-11-15
东莞市天相新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a wave-absorbing material to at least solve the problem that the wave-absorbing material in the prior art has a large volume and is not easy to be popularized and applied

Method used

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Embodiment 1

[0022] The embodiment of the present invention provides a method for preparing a wave-absorbing material, including the following steps:

[0023] Step 1: Take 0.30 parts by weight of polyurethane in 0.70 parts by weight of cyclohexanone, stir and dissolve in an open container to prepare glue;

[0024] Step 2: Take 1 part by weight of Fe-Si-Al flake magnetic powder and 0.040 parts by weight of BIBP in the glue obtained in step 1, stir and dissolve in an open container to obtain a raw material solution for wave-absorbing materials;

[0025] Step 3: Take the raw material liquid of the wave-absorbing material obtained in step 2, and coat the raw material liquid of the wave-absorbing material on the polymer film at a speed of 2.3m / min, and control the coating thickness to 0.17mm during the coating process; after coating, The coating is heated and cured by segmental temperature control. The temperature control segments of the segmental temperature control are 6 segments, and the tem...

Embodiment 2

[0028] The embodiment of the present invention provides a method for preparing a wave-absorbing material, including the following steps:

[0029] Step 1: Take 0.30 parts by weight of polyurethane in 0.70 parts by weight of cyclohexanone, stir and dissolve in an open container to prepare glue;

[0030] Step 2: Take 1 part by weight of Fe-Si-Al flake magnetic powder, 0.0360 parts by weight of BIBP, and 0.0040 parts by weight of HVA-2 in the glue obtained in step 1, stir and dissolve in an open container to obtain a raw material solution for wave-absorbing materials ;

[0031] Step 3: Take the raw material liquid of the wave-absorbing material obtained in step 2, and coat the raw material liquid of the wave-absorbing material on the polymer film at a speed of 2.3m / min, and control the coating thickness to 0.17mm during the coating process; after coating, The coating is heated and cured by segmental temperature control. The temperature control segments of the segmental temperatur...

Embodiment 3

[0034] The embodiment of the present invention provides a method for preparing a wave-absorbing material, including the following steps:

[0035] Step 1: Take 0.30 parts by weight of polyurethane in 0.70 parts by weight of cyclohexanone, stir and dissolve in an open container to prepare glue;

[0036] Step 2: Take 1 part by weight of electromagnetic noise absorber (the weight ratio of Fe-Si-Al flake magnetic powder and Fe-Si-Cr flake magnetic powder is 1:1), 0.040 parts by weight of BIBP in the glue obtained in step 1, and put Stir and dissolve in an open container to obtain the raw material liquid of the wave-absorbing material;

[0037] Step 3: Take the raw material liquid of the wave-absorbing material obtained in step 2, and coat the raw material liquid of the wave-absorbing material on the polymer film at a speed of 2.3m / min, and control the coating thickness to 0.17mm during the coating process; after coating, The coating is heated and cured by segmental temperature con...

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Abstract

The invention provides a method for preparing a wave absorbing material. The method comprises the following steps: (1) weighing and adding 0.08-0.30 part (by weight) of macromolecular gel granules into 0.50-2.20 parts (by weight) of organic solvent, and carrying out stirring for dissolving, so as to prepare size; (2) weighing and adding 1 part (by weight) of electromagnetic noise absorbent and 0.005-0.040 part (by weight) of vulcanizer into the size obtained in the step (1), and carrying out stirring for dissolving, so as to obtain a wave absorbing material feedstock solution; (3) producing asemifinished wave absorbing material from the wave absorbing material feedstock solution obtained in the step (2) by adopting a coating method through sectioned temperature control; and (4) curing thesemifinished wave absorbing material, thereby obtaining the finished wave absorbing material. In the prior art, ambient electromagnetic noises are removed by adopting wave absorbing materials with electromagnetic noise suppression functions, however, the existing wave absorbing materials are relatively large in size and are not prone to popularized application, suppression performance will be severely lowered if the wave absorbing materials are subjected to thin production directly, and the wave absorbing materials cannot be used normally. The wave absorbing material produced by the preparation method provided by the invention has the advantages of small size and high suppression capability.

Description

technical field [0001] The invention relates to a preparation method of a wave-absorbing material, in particular to a preparation method of an electromagnetic noise suppression sheet. Background technique [0002] With the development of science and technology in modern society, electronic products have been widely popularized, and communication methods such as wifi and 4G have become an indispensable part of people's lives. However, the wide application of electronic products will lead to the formation of a large number of electromagnetic radiation waves. On the one hand, it will cause harm to the human body. On the other hand, for precision electronic instruments, a large number of electromagnetic radiation waves will form electromagnetic noise, which seriously affects the normal use of electronic instruments. . In order to solve the above problems, the prior art adopts a wave-absorbing material with an electromagnetic noise suppression function to remove external electro...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D175/04C09D5/32H05K9/00
CPCC08K2003/023C08K2003/0812C08K2003/0856C09D5/32C09D175/04H05K9/0081C08K7/00C08K3/08C08K3/02
Inventor 杨应彬
Owner 东莞市天相新材料科技有限公司