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High-absorption light-type electromagnetic-absorbing coating

An electromagnetic wave, lightweight technology, applied in radiation-absorbing coatings, epoxy coatings, coatings, etc., can solve the problems of high specific gravity and high cost

Inactive Publication Date: 2004-01-28
长春恒威电磁兼容技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a high-absorbing light-weight electromagnetic wave absorbing coating to solve the problems of large specificity and high cost of foreign products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 100Phr of epoxy resin, 1Phr of carbon micropowder, 35phr of carbon fiber, the length of the carbon fiber is 3mm, uniformly mixed, coated into a coating with a thickness of 0.5mm, and dried at room temperature for 8hr to prepare a coating-type sheet-shaped electromagnetic wave absorber. The electromagnetic wave absorption reaches 20dB at 39GHz, and the specific gravity of the material is 1.3g / cm 3 .

Embodiment 2

[0015] 100phr of epoxy resin, 1phr of carbon micropowder, 27phr of carbon fiber, the length of the carbon fiber is 0.5mm, uniformly mixed, coated into a coating with a thickness of 0.8mm, and dried at room temperature for 8hr to prepare a coating-type sheet-shaped electromagnetic wave absorber. The absorption of electromagnetic waves at 27GHz reaches 21dB, and the specific gravity of the material is 1.3g / cm 3 .

Embodiment 3

[0017] 100phr of epoxy resin, 1phr of carbon micropowder, 30phr of carbon fiber, the length of the carbon fiber is 5mm, uniformly mixed, coated into a coating with a thickness of 0.6mm, and dried at room temperature for 8hr to prepare a coating-type sheet-shaped electromagnetic wave absorber. Prepared a soft sheet-shaped electromagnetic wave absorber that can absorb 22dB of electromagnetic waves at 33GHz, and the specific gravity of the material is 1.3g / cm 3 .

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Abstract

The present invention relates to a high absorption light type electromagnetic wave absorbing coating. it is characterized by that said invention is a coating type thin sheet shaped electromagnetic wave obsorbing body made up by using epoxy resin 100 phr, carbon micropowder 1 phr and carbon fibre 25-35 phr, the length of said carbon fibre is less than 5 mm, through the processes of uniformly mixing them, applying it and making it into a coating layer whose thicknes if 0.5-0.8 mm and drying for 8 hr at normal temp. Said invention has the extensive application range.

Description

technical field [0001] The invention belongs to an electromagnetic wave absorbing material. Background technique [0002] With the rapid development of the information society, electronic products are becoming more and more popular. While electronic products bring great convenience to people, they also bring certain harm. In particular, with the widespread use of electronic devices with built-in information processing devices, the computing speed of the CPU is getting higher and higher, and the resulting high-frequency electromagnetic wave radiation and noise pollution are becoming more and more serious. The deteriorating electromagnetic environment not only affects the communication, computer, and signal propagation of various electronic systems that human life increasingly relies on, causing malfunctions of system devices and unpredictable disasters, but also poses a threat to human health. In view of this, the International Health Organization has listed electromagnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/32C09D163/00
Inventor 郝万军
Owner 长春恒威电磁兼容技术有限公司