CN102802395A - Electromagnetic shielding composite coating resistant to information leakage and radiation pollution - Google Patents
Electromagnetic shielding composite coating resistant to information leakage and radiation pollution Download PDFInfo
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- CN102802395A CN102802395A CN2012102953116A CN201210295311A CN102802395A CN 102802395 A CN102802395 A CN 102802395A CN 2012102953116 A CN2012102953116 A CN 2012102953116A CN 201210295311 A CN201210295311 A CN 201210295311A CN 102802395 A CN102802395 A CN 102802395A
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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
The present invention relates to a kind of coating for EMI shielding material, the electromagnetic shielding composite coating of a kind of specifically anti-information-leakage and radiation pollution.
Background technology
Along with the develop rapidly of electronic technology and the extensive use of electronic equipment; The information security issue direct threats that causes arrives national politics, economy, military affairs, diplomatic interests and safety because electromagnetic information is divulged a secret; In the economic field,, electromagnetic information cause divulging a secret of enterprise's trade secret also enterprise to be caused immeasurable massive losses because revealing.Electromagenetic wave radiation can be upset the body normal physiological activity in addition; Accumulate over a long period and to cause neurasthenia; Endocrine disturbance descends the physiological function of human body and immunocompetence greatly, and electromagenetic wave radiation also can be induced the human body cell variation and then caused leukaemia, tumour; Even cause that embryo chromosome changes, cause the baby to distort and pregnant woman's miscarriage.Electromagnetic radiation pollution and noise pollution, air pollution, water pollute and have been listed as current social four big pollution nuisances.
Realize that in the wide band electromagnetic wave scope information-leakage and radiation pollution control to electronic equipment are very necessary; But because the electromagnetic wave frequency range broad that electronic equipment produces; Single low frequency and high-frequency electromagnetic shielding material can not realize simultaneously that in wide frequency range traditional electromagnetic shielding material can't satisfy the shielding requirements to electronic equipment to the electromagnetic shielding action of low frequency and high frequency alternating electromagnetism ripple.
Summary of the invention
Problem to above-mentioned existence; The objective of the invention is to overcome above shortcomings and deficiencies; The electromagnetic shielding composite coating of a kind of anti-information-leakage and radiation pollution is provided, can be implemented in simultaneously in the wide frequency range electromagnetic high reflection loss, high absorption loss and high screening effectiveness.This electromagnetic shielding composite coating uses simple, and cost is low, has very strong electromagnet shield effect at wide frequency range, can satisfy the shielding requirements of military affairs, industry, science and Medical Devices.
For realizing above-mentioned purpose, the present invention adopts following design:
Apply high magnetic loss and the dielectric loss composite shielding material is made high absorbed layer at PVC plastic plate matrix surface ground floor; Apply the high conductivity composite shielding material at the second layer and make high reflection layer; Make transition zone at the 3rd layer of coating low permeability, high-saturation magnetic induction composite shielding material; Apply the high resistivity composite shielding material at outermost layer and make the electromagnetic wave impedance matching layer.Between above-mentioned each layer, apply the layer of filled material respectively.
High absorbing layer materials is the mixture that 75～78% iron based nano crystal magnetics, 18%～22% acrylic resin, 1.2%～1.5% titanate coupling agent and surplus xylenes are formed by weight content, coating layer thickness 210～220 μ m; The high reflection layer material is the mixture that 75～78% globular powdered nickels, 18%～22% acrylic resin, 1.2%～1.5% titanate coupling agent and surplus xylenes are formed by weight content, coating layer thickness 35～40 μ m; Buffer layer material is to be 18～21% globular powdered nickels, 58～60% Fe-based amorphous magnetics by weight content, the mixture that 18%～22% acrylic resin, 1.2%～1.5% titanate coupling agent and surplus xylenes are formed, coating layer thickness 65～70 μ m; The mixture that electromagnetic wave impedance matching layer material is made up of weight content 20～24% nano-nickel powders, 72～74% Fe-based amorphous magnetics, 1.2%～1.5% titanate coupling agent and surplus xylenes, coating layer thickness 100～110 μ m; Intermediate filling layer is acrylic resin, and coating layer thickness is 25～30 μ m.
Above-mentioned composite coating material is after ingredient composition, mixing, dilution, dispersion treatment; Adopt the spray gun layering to be ejected on the PVC plastic plate basis material; Through the dry curing that realizes composite coating, promptly form the electromagnetic shielding composite coating then, basis material is the PVC plastic plate.
This electromagnetic shielding composite coating adopts absorption-type and reflection-type shielding coating to combine; The electro-magnetic screen layer that is made up of " impedance matching layer+packed layer+transition zone+high reflection layer+packed layer+high absorbed layer " can be implemented in the wide frequency range electromagnetic high reflection loss, high absorption loss and high screening effectiveness simultaneously, can satisfy the requirement of military civilian industry to electromagnetic shielding.
Description of drawings
Fig. 1 electromagnetic shielding composite coating applies the coating profile structural representation that forms.
1. PVC plastic plates among Fig. 1; 2. high absorbed layer; 3. packed layer; 4. high reflection layer; 5. packed layer; 6. transition zone; 7. packed layer; 8. impedance matching layer
Embodiment
Below in conjunction with Fig. 1 the raw material sources of composite coating, the preparation of composite coating and the coating processing of composite coating are further described.
1, the raw material sources of composite coating:
Iron based nano crystal magnetic (shape: irregular; Granularity: 4～8 μ m) commercially available, Hunan Metallurgical Material Inst..
Fe-based amorphous magnetic (shape: en plaque; Granularity: 5～10 μ m); Commercially available, Hunan Metallurgical Material Inst..
Globular powdered nickel (shape: ball shape; Granularity: 5～15 μ m) commercially available, Hunan Metallurgical Material Inst..
Nano-nickel powder (shape: atom bulk; Granularity: 3～5 μ m) commercially available, Hunan Metallurgical Material Inst..
Titanate coupling agent (D401 type): commercially available, Nanjing dawn chemical industry Co., Ltd;
Acrylic resin (1020 type): commercially available, the Shanghai height is revealed Engineering Co., Ltd;
Xylenes: commercially available, chemical industry Co., Ltd is rather tried in Nanjing;
2, the preparation of composite coating
(1) preparation of high absorbed layer coating
Take by weighing 760 gram iron based nano crystal magnetics and 180 gram acrylic resins, mix, add 14 gram titanate coupling agents, add 46 gram xylenes then and dilute, mixture is put into the ball mill ball milling, ball milling time 25min, rotating speed 300r/min.Ball milling is poured high absorbed layer coating in the paint can that is labeled as No. 1 into after accomplishing.
(2) preparation of high reflection layer coating
Take by weighing 760 gram globular powdered nickels and 180 gram acrylic resins, mix, add 14 gram titanate coupling agents, add 46 gram xylenes then and dilute, mixture is put into the ball mill ball milling, ball milling time 25min, rotating speed 300r/min.Ball milling is poured high reflection layer coating in the paint can that is labeled as No. 2 into after accomplishing.
(3) preparation of transition zone coating
Take by weighing 180 gram globular powdered nickels, the 580 Fe-based amorphous magnetics of gram and 180 gram acrylic resins, mix, add 14 gram titanate coupling agents; Adding 46 gram xylenes then dilutes; Mixture is put into the ball mill ball milling, ball milling time 25min, rotating speed 300r/min.Ball milling is poured transition zone coating in the paint can that is labeled as No. 3 into after accomplishing.
(4) preparation of anti-matching layer coating
Take by weighing 180 gram globular powdered nickels and the 580 Fe-based amorphous magnetics of gram and 180 gram acrylic resins, mix, add 14 gram titanate coupling agents; Adding 46 gram xylenes then dilutes; Mixture is put into the ball mill ball milling, ball milling time 25min, rotating speed 300r/min.Ball milling is poured anti-matching layer coating in the paint can that is labeled as No. 4 into after accomplishing.
(5) preparation of packed layer coating
Take by weighing 900 gram acrylic resins, add 100 gram xylenes and dilute, mixture is put into the ball mill ball milling, ball milling time 25min, rotating speed 300r/min.Ball milling is poured packed layer coating in the paint can that is labeled as No. 5 into after accomplishing.
3, the coating processing of composite coating
(1) PVC plastic sheet surface clean:
As substrate, to PVC plastic plate 1 surface finish,, remove the greasy dirt, spot of PVC plastic plate 1 surface attachment etc. with PVC plastic plate 1 to increase PVC plastic plate 1 surface roughness with sand paper, then with banana oil to PVC plastic plate 1 surface clean, airing.
(2) spraying of composite shielding coating:
PVC plastic plate 1 horizontal fixed is good, with spray gun above-mentioned composite coating layering is ejected on the PVC plastic plate 1 high absorbed layer 2 coating layer thicknesses 210～220 μ m then; High reflection layer 4 coating layer thicknesses 35～40 μ m; Transition zone 6 coating layer thicknesses 65～70 μ m, anti-matching layer 8 coating layer thicknesses 100～110 μ m, packed layer 2, packed layer 4, packed layer 6 coating layer thicknesses 25～30 μ m; In Shade 24 hours of PVC plastic plate after the spray treatment; Dry, fully solidify, promptly form the electromagnetic shielding composite coating at PVC plastic plate 1.
Claims (8)
1. the electromagnetic shielding composite coating of anti-information-leakage and radiation pollution is characterized in that, applies high magnetic loss and the dielectric loss composite shielding material is made high absorbed layer at PVC plastic plate matrix surface ground floor; Apply the high conductivity composite shielding material at the second layer and make high reflection layer; Make transition zone at the 3rd layer of coating low permeability, high-saturation magnetic induction composite shielding material; Apply the high resistivity composite shielding material at outermost layer and make the electromagnetic wave impedance matching layer, between above-mentioned each layer, apply the layer of filled material respectively.
2. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution; It is characterized in that; High absorbing layer materials is the mixture that 75～78% iron based nano crystal magnetics, 18%～22% acrylic resin, 1.2%～1.5% titanate coupling agent and surplus xylenes are formed by weight content, coating layer thickness 210～220 μ m.
3. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution; It is characterized in that; The high reflection layer material is the mixture that 75～78% globular powdered nickels, 18%～22% acrylic resin, 1.2%～1.5% titanate coupling agent and surplus xylenes are formed by weight content, coating layer thickness 35～40 μ m.
4. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution; It is characterized in that; Buffer layer material is to be 18～21% globular powdered nickels, 58～60% Fe-based amorphous magnetics by weight content; The mixture that 18%～22% acrylic resin, 1.2%～1.5% titanate coupling agent and surplus xylenes are formed, coating layer thickness 65～70 μ m.
5. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution; It is characterized in that; The mixture that electromagnetic wave impedance matching layer material is made up of weight content 20～24% nano-nickel powders, 72～74% Fe-based amorphous magnetics, 1.2%～1.5% titanate coupling agent and surplus xylenes, coating layer thickness 100～110 μ m.
6. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution is characterized in that the intermediate filling layer material is acrylic resin, and coating layer thickness is 25～30 μ m.
7. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution; It is characterized in that; Above-mentioned composite coating material is after ingredient composition, mixing, dilution, Ball milling are handled; Adopt the spray gun layering to be ejected on the PVC plastic matrix material, through the dry curing that realizes composite coating, promptly form the electromagnetic shielding composite coating then.
8. the electromagnetic shielding composite coating of a kind of anti-information-leakage according to claim 1 and radiation pollution is characterized in that basis material is the PVC plastic plate.
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| CN2012102953116A CN102802395A (en) | 2012-08-19 | 2012-08-19 | Electromagnetic shielding composite coating resistant to information leakage and radiation pollution |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104039121A (en) * | 2013-03-08 | 2014-09-10 | 祝琼 | Wave-absorbing magnetic-conductive shielding film and manufacture method thereof |
| CN106141165A (en) * | 2012-12-26 | 2016-11-23 | 胜美达集团株式会社 | A kind of mixture and employ the manufacture method of inductance of this mixture |
| CN106659100A (en) * | 2016-11-10 | 2017-05-10 | 无锡市明盛强力风机有限公司 | Manganese dioxide modified wave-absorbing material |
| CN108285604A (en) * | 2018-03-07 | 2018-07-17 | 孙奉生 | A kind of composite material for shielding electromagnetic radiation |
| CN109835010A (en) * | 2017-11-29 | 2019-06-04 | 深圳光启岗达创新科技有限公司 | A kind of Wave suction composite material and preparation method thereof |
| CN109994236A (en) * | 2017-12-29 | 2019-07-09 | 中国核动力研究设计院 | A kind of integrated form shielding material composite construction |
| CN111740585A (en) * | 2020-06-04 | 2020-10-02 | 许继集团有限公司 | Electromagnetic interference preventing flexible direct current converter valve secondary board card and manufacturing method |
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2012
- 2012-08-19 CN CN2012102953116A patent/CN102802395A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106141165A (en) * | 2012-12-26 | 2016-11-23 | 胜美达集团株式会社 | A kind of mixture and employ the manufacture method of inductance of this mixture |
| CN104039121A (en) * | 2013-03-08 | 2014-09-10 | 祝琼 | Wave-absorbing magnetic-conductive shielding film and manufacture method thereof |
| CN104039121B (en) * | 2013-03-08 | 2017-10-31 | 祝琼 | One kind inhales waveguide magnetic shield film and preparation method thereof |
| CN106659100A (en) * | 2016-11-10 | 2017-05-10 | 无锡市明盛强力风机有限公司 | Manganese dioxide modified wave-absorbing material |
| CN109835010A (en) * | 2017-11-29 | 2019-06-04 | 深圳光启岗达创新科技有限公司 | A kind of Wave suction composite material and preparation method thereof |
| CN109835010B (en) * | 2017-11-29 | 2021-12-17 | 深圳光启岗达创新科技有限公司 | Wave-absorbing composite material and preparation method thereof |
| CN109994236A (en) * | 2017-12-29 | 2019-07-09 | 中国核动力研究设计院 | A kind of integrated form shielding material composite construction |
| CN108285604A (en) * | 2018-03-07 | 2018-07-17 | 孙奉生 | A kind of composite material for shielding electromagnetic radiation |
| CN111740585A (en) * | 2020-06-04 | 2020-10-02 | 许继集团有限公司 | Electromagnetic interference preventing flexible direct current converter valve secondary board card and manufacturing method |
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Application publication date: 20121128 |