CN101552044A - Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof - Google Patents
Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof Download PDFInfo
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- CN101552044A CN101552044A CNA2009100308990A CN200910030899A CN101552044A CN 101552044 A CN101552044 A CN 101552044A CN A2009100308990 A CNA2009100308990 A CN A2009100308990A CN 200910030899 A CN200910030899 A CN 200910030899A CN 101552044 A CN101552044 A CN 101552044A
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- electromagnetic wave
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- flame retardant
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Abstract
The invention relates to a novel electromagnetic wave absorbing material and a preparation method thereof. The electromagnetic wave absorbing material is a pyramid unit body which adopts flame retardant polystyrene foam plastic board as a base body; and a conductive flame retardant coating is coated on the inner surface and the outer surface of the polystyrene foam plastic board. The electromagnetic wave absorbing material is prepared by the following steps of: preparing conductive flame retardant paint, cutting and forming, brushing the conductive flame retardant coating, using an organic adhesive to bond into single pyramid and carrying out external decoration and the like. The invention effectively solves the defects that ferrite composite electromagnetic wave absorbing material has friability, large specific gravity, high energy consumption and high comprehensive cost, has the advantages of small specific gravity, simple preparing technique and low cost and effectively solves the problems of bending, picking and environmental protection and the like of polyurethane wave absorbing material.
Description
Technical field
The present invention relates to a kind of new electromagnetic wave absorbing material and preparation method thereof, relate generally to a kind of important materials of the EMC of being applied to anechoic chamber,, the test environment that satisfies the EMC test is provided.
Background technology
EMC (electromagnetic compatibility) refers generally to electric and electronic equipment can be carried out the coexisting state of function separately in common electromagnetic environment, promptly requires the various device in same electromagnetic environment operate as normal not disturb mutually again, reaches " compatibility " state.Current, under limited time, space and limited frequency spectrum resources condition, various quantity electric and electronic equipment increase sharply, and the utilization of household electrical appliance, more make these equipment spread all over huge numbers of families, the consumer dense degree is increasing, and the die is cast in the space electromagnetic environment deterioration, jeopardized the environment of human survival.Given this, countries in the world and each relevant industries are one after another to the Electro Magnetic Compatibility of the equipment standard of formulating standard, and have worked out relevant authentication implementing measure.
As everyone knows, the electromagnetic compatibility field is compared with other specialties, depend on measurement more, and electromagnetic compatibility is measured very strict again to the requirement of test condition.The EMC of electronic equipment test at present is to carry out in the EMC darkroom basically.
The EMC anechoic chamber, is built with electromagnetic wave absorbent material all with both at home and abroad all based on ferrite watt and isocyanurate foam electromagnetic wave absorbent material compound substance.
Ferrite watt quality is hard, frangible, than great, adopt the manufacturing of high temperature sintering technology, highly energy-consuming, cost is very high; Isocyanurate foam absorbing material processing technology complexity, homogeneity of product is poor, the dry run highly energy-consuming, because base material self aging action, can only guarantee 5-8 tenure of use, easily aging simultaneously dry linting, elbow, the release toxic gas etc. of producing.So the integrated cost height of ferrite and isocyanurate foam electromagnetic wave absorbent material compound substance influences its use.
Previous Chinese patent application 200610041349.5 discloses a kind of flame resisting wave-absorbing material, its technical scheme is: be to be the cube-corner elements body of matrix with the nonwoven fabrics, it is characterized in that, be coated with flame retardant coating on the surfaces externally and internally of nonwoven fabrics, outside flame retardant coating, be coated with conductive coating.But the frequency of operation height can not satisfy the needs that the EMC anechoic chamber, is built.
Summary of the invention
The purpose of this invention is to provide a kind of anechoic chamber, of EMC cheaply electromagnetic wave absorbent material, thoroughly solve ferrite watt and isocyanurate foam absorbing material cost height, easy aging defective, satisfy the requirement that the EMC anechoic chamber, is built.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electromagnetic wave absorbent material, be to be the cube-corner elements body of matrix with the polystyrol plastic foam plate material, it is characterized in that, be coated with the conduction flame retardant coating on the surfaces externally and internally of polystyrol plastic foam plate material.
Said conduction flame retardant coating, its coating are formulated by radio-radar absorber, organic composite flame-retardant, pigment dispersing agent, organic adhesion agent, water.
Wherein said organic composite flame-retardant is decabromodiphenyl oxide, tetrabromobisphenol A, Sb
2O
3In one or more.
The preferred acetylene carbon black of wherein said radio-radar absorber.
The preferred acrylic emulsion of wherein said organic adhesion agent.
Wherein said pigment dispersing agent preferred dispersants M.
Further, because the EMC anechoic chamber, is a hollow body with the electromagnetic wave absorbent material structure, the little pyramid of inner insertion is useful to material high frequency absorption performance.
Another object of the present invention provides the preparation method of said electro-magnetic wave absorption absorbing material, specifically may further comprise the steps:
1) preparation conduction anti-flaming dope: radio-radar absorber, organic fire-retardant, pigment dispersing agent, organic adhesion agent, water are mixed, be mixed with the conduction anti-flaming dope;
2) excision forming: the polyphenyl foam plastic plate is cut into trapezoidal sheet material with cutting machine
3) brushing conduction flame retardant coating: the anti-flaming dope that will conduct electricity is coated on the inside and outside surface of polystyrol plastic foam plate matrix and oven dry.
4) with the single pyramid of the bonding one-tenth of organic adhesion agent;
5) outer decoration impression moulding: paste PVC Boeing film on the pyramid surface and carry out incrustation.
In order to make product of the present invention have preferable performance, the proportioning of conduction anti-flaming dope is recommended following weight portion among the present invention:
Radio-radar absorber 4.5-5.5 part, organic adhesion agent 20-25 part, organic fire-retardant 2.5-3.5 part, pigment dispersing agent 0.8-1.2 part, water 65-70 part.
The present invention develops a kind of present widely used ferrite and compound electromagnetic wave absorbent material of isocyanurate foam absorbing material of being different from fully, effectively solved the ferrite composite electromagnetic absorption material frangible, than great, highly energy-consuming, defective that integrated cost is high, have the advantage that proportion is little, manufacturing process is simple, cost is low, efficiently solve problems such as polyurethane wave-absorbing material elbow, dry linting, environmental protection.This material uses PVC Boeing film to carry out outer the decoration, and color and luster is simple and elegant, and with the EMC anechoic chamber, bright in appearance of its construction, daylighting is effective, and price only is ferrite watt and 1/3 of isocyanurate foam pyramid absorbing material compound substance.This electromagnetic wave absorbent material can guarantee more than 10 years serviceable life.
Description of drawings
Fig. 1 is the cube-corner elements body stereographic map of electromagnetic wave absorbent material of the present invention;
Fig. 2 is the sectional view of Fig. 1.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Employed in the present invention term unless other explanation is arranged, generally has the implication of those of ordinary skills' common sense.
In following embodiment, various processes of Xiang Ximiaoshuing and method are not conventional methods as known in the art.
Embodiment 1:
(following umber is to revise by top ratio range)
With the polystyrol plastic foam plate material is matrix; With 4.5 parts of acetylene carbon blacks, 25 parts of organic adhesion agents (as acrylic emulsion), 2 parts of decabromodiphenyl oxides, Sb
2O
3After 0.5 part, 0.8 part of spreading agent and water are placed on for 65 parts and are uniformly dispersed in the high speed dispersor; Grind one time with sand mill, make the conduction anti-flaming dope even, fine and smooth; According to drawing, the polystyrol plastic foam plate material is cut into trapezoidal with cutting machine, use special-purpose coating apparatus will cut out trapezoidal good inside and outside surface-coated conduction anti-flaming dope, 60 ℃ of left and right sides temperature oven dry.Conduct electricity the sheet material of flame retardant coating with brushing, brush coating, paste into pyramid (as Fig. 1, Fig. 2); Decorate the outside surface of pyramid with the PVC Boeing film of band gum.
The novel wave-absorbing material that the present invention makes after tested its performance shown in table 1, table 2
Table 1 novel wave-absorbing material performance test of the present invention
Table 2. nonwoven fabrics pyramid absorbing material and absorbing material of the present invention contrast
Embodiment 2:
Substantially the same manner as Example 1, difference is that the conduction anti-flaming dope is pressed following preparation: 5.5 parts of acetylene carbon blacks, 20 parts of organic adhesion agents, 3.5 parts of tetrabromobisphenol As, 1.2 parts of spreading agents, 70 parts in water.
The invention is not restricted to these disclosed embodiments, the present invention will cover the scope described in the patent book, and the various modification of power claimed range and equivalence variation.
Claims (7)
1, a kind of electromagnetic wave absorbent material is to be the cube-corner elements body of matrix with the flame retardant polystyrene foam plastic plate, it is characterized in that, is coated with the conduction flame retardant coating on the surfaces externally and internally of polystyrol plastic foam plate.
2, electromagnetic wave absorbent material as claimed in claim 1 is characterized in that, said conduction flame retardant coating, its coating are formulated by radio-radar absorber, organic composite flame-retardant, pigment dispersing agent, organic adhesion agent water.
3, electromagnetic wave absorbent material as claimed in claim 2 is characterized in that, wherein said organic composite flame-retardant is decabromodiphenyl oxide, tetrabromobisphenol A, Sb
2O
3In one or more.
4, electromagnetic wave absorbent material as claimed in claim 2 is characterized in that, wherein said radio-radar absorber is an acetylene carbon black.
5, electromagnetic wave absorbent material as claimed in claim 2 is characterized in that, wherein said organic adhesion agent is an acrylic emulsion.
6, electromagnetic wave absorbent material as claimed in claim 2 is characterized in that, the cube-corner elements body is provided with one or more little cube-corner elements body in the bottom.
7, prepare the method for the described electromagnetic wave absorbent material of claim 1, it is characterized in that, may further comprise the steps:
1) preparation conduction anti-flaming dope: radio-radar absorber, organic fire-retardant, pigment dispersing agent, organic adhesion agent, water are mixed, be mixed with the conduction anti-flaming dope;
2) excision forming: the polyphenyl foam plastic plate is cut into trapezoidal sheet material with cutting machine;
3) brushing conduction flame retardant coating: the anti-flaming dope that will conduct electricity is coated on the polystyrol plastic foam plate matrix surfaces externally and internally and oven dry;
4) with the single pyramid of the bonding one-tenth of organic adhesion agent;
5) the outer decoration: paste PVC Boeing film on the pyramid surface and carry out incrustation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100308990A CN101552044A (en) | 2009-04-17 | 2009-04-17 | Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100308990A CN101552044A (en) | 2009-04-17 | 2009-04-17 | Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof |
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|---|---|
| CN101552044A true CN101552044A (en) | 2009-10-07 |
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|---|---|---|---|
| CNA2009100308990A Pending CN101552044A (en) | 2009-04-17 | 2009-04-17 | Electromagnetic wave absorbing material used for EMC electric wave darkroom and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701797A (en) * | 2012-01-31 | 2012-10-03 | 鸿康磁业电子（昆山）有限公司 | Ferrite coating of porous ceramic |
| CN103700410A (en) * | 2013-12-31 | 2014-04-02 | 南京南大波平电子信息有限公司 | Difficult-to-burn type wave-absorbing material for electromagnetic compatible anechoic chamber and preparation method thereof |
| CN106147702A (en) * | 2015-04-03 | 2016-11-23 | 深圳光启尖端技术有限责任公司 | A kind of Wave suction composite material and preparation method thereof |
| CN106519471A (en) * | 2016-10-26 | 2017-03-22 | 大连东信微波技术有限公司 | Wave absorbing material and preparation method thereof |
| CN109353100A (en) * | 2018-09-28 | 2019-02-19 | 南京波平电子科技有限公司 | The high power combined absorbing material of nonflammable broadband |
| CN109796623A (en) * | 2019-01-28 | 2019-05-24 | 南京波平电子科技有限公司 | A kind of electromagnetic compatibility takes into account antenna measurement absorbing material and preparation method thereof |
-
2009
- 2009-04-17 CN CNA2009100308990A patent/CN101552044A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701797A (en) * | 2012-01-31 | 2012-10-03 | 鸿康磁业电子（昆山）有限公司 | Ferrite coating of porous ceramic |
| CN103700410A (en) * | 2013-12-31 | 2014-04-02 | 南京南大波平电子信息有限公司 | Difficult-to-burn type wave-absorbing material for electromagnetic compatible anechoic chamber and preparation method thereof |
| CN106147702A (en) * | 2015-04-03 | 2016-11-23 | 深圳光启尖端技术有限责任公司 | A kind of Wave suction composite material and preparation method thereof |
| CN106147702B (en) * | 2015-04-03 | 2020-07-31 | 深圳光启尖端技术有限责任公司 | Wave-absorbing composite material and preparation method thereof |
| CN106519471A (en) * | 2016-10-26 | 2017-03-22 | 大连东信微波技术有限公司 | Wave absorbing material and preparation method thereof |
| CN109353100A (en) * | 2018-09-28 | 2019-02-19 | 南京波平电子科技有限公司 | The high power combined absorbing material of nonflammable broadband |
| CN109796623A (en) * | 2019-01-28 | 2019-05-24 | 南京波平电子科技有限公司 | A kind of electromagnetic compatibility takes into account antenna measurement absorbing material and preparation method thereof |
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Open date: 20091007 |