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Radio frequency electromagnetic impedance match anti-electromagnetic interference composite coating, preparation and spray coating method

An anti-electromagnetic interference and impedance matching technology, applied in radiation-absorbing coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems affecting the application field of RFID, signal conduction interference and attenuation, and affecting the reliability and accuracy of data reading. and other problems, to achieve the effect of strong anti-electromagnetic signal interference ability, low RFID misreading rate and small reflection

Inactive Publication Date: 2009-02-25
西安华捷科技发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application areas that affect RFID
[0023] Before the implementation of the present invention, in RFID applications at home and abroad, when radio waves encounter metal or liquid, signal transmission will cause interference and attenuation, which will affect the reliability and accuracy of data reading

Method used

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  • Radio frequency electromagnetic impedance match anti-electromagnetic interference composite coating, preparation and spray coating method
  • Radio frequency electromagnetic impedance match anti-electromagnetic interference composite coating, preparation and spray coating method
  • Radio frequency electromagnetic impedance match anti-electromagnetic interference composite coating, preparation and spray coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] The wave-absorbing composite coating is composed of impedance matching coating and bottom carbon black coating. The impedance matching coating is composed of 58%-80% resin solution, 8%-40% nano-β silicon carbide, 1%-2% nano-nickel, 1%- 12% polystyrene; the bottom carbon black coating is composed of 75%-85% resin solution and 15%-25% carbon black.

[0104] One, the preparation method of wave-absorbing composite coating, carry out according to the following steps:

[0105] 1) Resin solution preparation:

[0106] ①Solvent preparation:

[0107] The solvent is composed of three substances: methyl isobutyl ketone, ethylene glycol butyl ether, and n-butanol. According to the mass ratio, methyl isobutyl ketone: ethylene glycol butyl ether: n-butanol=3~5:1~3:1 , stirring and mixing the above solvents evenly;

[0108] ② Dissolution of resin

[0109] Add one or two of B133 resin, epoxy resin or acrylic resin to the solvent at a constant speed and slowly, resin:solvent=7~8:2~3,...

Embodiment 2

[0126] The wave-absorbing composite coating is composed of impedance matching coating and bottom carbon black coating, and the impedance matching coating is composed of 60% to 76% resin solution, 10% to 36% nano-β silicon carbide, 1% to 2% nano-nickel, 1 %-10% polystyrene, the bottom carbon black coating is composed of 77%-82% resin solution and 18%-23% carbon black, the preparation method and spraying method are the same as in Example 1.

Embodiment 3

[0128] The wave-absorbing composite coating is composed of impedance matching coating and bottom carbon black coating, and the impedance matching coating is composed of 62%-73% resin solution, 16%-30% nano-β silicon carbide, 1%-2% nano-nickel, 1 % to 9% polystyrene, and the bottom carbon black coating is composed of 79% to 81% resin solution and 19% to 21% carbon black. The preparation method and spraying method are the same as in Example 1.

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Abstract

The invention discloses a radio-frequency electromagnetic impedance matching anti-electromagnetic interference composite coating, a preparation method and a spraying method thereof. The impedance matching coating consists of a resin solution, nano-beta silicon carbide, nano-nickel powder and polystyrene; the bottom black carbon coating consists of the resin solution and black carbon. The preparation method comprises solution preparation, resin dissolution, preparation of the impedance matching coating and preparation of the bottom black carbon coating. The spraying method is as follows: the bottom black carbon coating is first sprayed, and then the impedance matching coating is sprayed, both the coatings are dried at the temperature of 60-75 DEG C for 30min to obtain the radio-frequency electromagnetic impedance matching anti-electromagnetic interference composite coating. The coating obtained has the advantages of high electromagnetic impedance matching, strong anti-electromagnetic interference ability, wide absorption band, high absorptivity, little reflection, low RFID misreading rate, no secondary electromagnetic pollution, etc. The coating effectively solves the problem that signal transduction is interfered in and attenuated when electric waves meet metal or liquid in the RFID application, and further the reliability and accuracy of data reading are affected, thus the coating greatly expands the application field of the RFID, and can be widely used in various fields of radio frequency.

Description

technical field [0001] The invention relates to a coating and a preparation and spraying method, in particular to a radio frequency electromagnetic impedance matching anti-electromagnetic interference composite coating and a preparation and spraying method. Background technique [0002] Radio Frequency Identification (RFID) refers to the application of radio frequency identification signals to identify objects. RFID technology is a technology with a built-in radio chip, which can store a series of information. The volume of radio frequency identification products can be made extremely small, and can be attached to the entity that needs to be identified, and the stored information can be quickly read in a non-contact manner. Compared with the traditional barcode system, the advantages of RFID include: stored data can be read and written, the shape is easy to miniaturize and diversify, environmental resistance, reusable, information transmission is penetrable, and information...

Claims

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Application Information

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IPC IPC(8): C09D5/32C09D5/12C09D163/00C09D133/00C09D125/06B05D1/36B05D3/00B05D5/00
Inventor 高建中
Owner 西安华捷科技发展有限责任公司
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