Electromagnetic shielding composite coating resistant to information leakage and radiation pollution

Abstract

The invention relates to an electromagnetic shielding composite coating resistant to information leakage and radiation pollution. The electromagnetic shielding composite coating is characterized in that a composite shielding material with high magnetic loss and high dielectric loss is coated on the first layer on the surface of a PVC (Polyvinyl Chloride) plastic plate to serve as a high-absorption layer; a composite shielding material with high electric conductivity is coated on the second layer on the surface of the PVC plastic plate to serve as a high-reflection layer; a composite shielding material with low magnetic conductivity and high saturation magnetic induction is coated on the third layer on the surface of the PVC plastic plate to serve as a transition layer; and a composite shielding material with high resistivity is coated on the outermost layer on the surface of the PVC plastic plate to serve as a electromagnetic wave impedance matching layer, a filling material is respectively coated among the layers. After being subjected to treatments including component preparation, mixing, diluting, and ball milling dispersion, the materials of the composite coating are sprayed to a PVC plastic matrix material through a spray gun layer by layer, and then are dried to be solidified to form an electromagnetic shielding composite coating layer. According to the invention, a material and structure integrated design technology is adopted, the electromagnetic shielding composite coating can be used to achieve the purposes of high reflection loss, high absorption loss and high shielding effectiveness to electromagnetic waves within a broadband range of 1MHz-1GHz at the same time.

Description

technical field [0001] The invention relates to an electromagnetic shielding coating material, in particular to an electromagnetic shielding composite coating resistant to information leakage and radiation pollution. Background technique [0002] With the rapid development of electronic technology and the wide application of electronic equipment, information security issues caused by electromagnetic information leakage directly threaten the political, economic, military, and diplomatic interests and security of the country. The leakage of confidentiality also causes immeasurable huge losses to the enterprise. In addition, electromagnetic wave radiation will disturb the normal physiological activities of the human body. Over time, it will lead to neurasthenia and endocrine disorders, which will greatly reduce the physiological function and immunity of the human body. Electromagnetic wave radiation will also induce human cell mutation and cause leukemia, tumors, and even cause...

AI Technical Summary

Problems solved by technology

[0003] It is very necessary to realize the information leakage and radiation pollution prevention and control of electronic equipment in the range of broadband electromagnetic waves. However, due to the wide frequency band of electromagnetic waves generated by electronic equipment, a single low-frequency and high-frequency electromagnetic shielding material cannot simultaneously realize protection against low-frequency and high-frequency electromagnetic waves within a wide frequency range. The electromagnetic shielding effect of high-frequency alternating electromagnetic waves, traditional electromagnetic shielding materials cannot meet the shielding requirements for electronic equipment

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