CN205196228U - Wide band electromagnetic wave absorbs complex body with fire -retardant characteristic - Google Patents
Wide band electromagnetic wave absorbs complex body with fire -retardant characteristic Download PDFInfo
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- CN205196228U CN205196228U CN201520550636.3U CN201520550636U CN205196228U CN 205196228 U CN205196228 U CN 205196228U CN 201520550636 U CN201520550636 U CN 201520550636U CN 205196228 U CN205196228 U CN 205196228U
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- electromagnetic wave
- soft magnetic
- iron
- magnetic alloy
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Abstract
The utility model discloses a wide band electromagnetic wave absorbs complex body with fire -retardant characteristic, including the polymer main part, the equipartition has a plurality of iron -based soft magnetic alloy granules in the polymer main part, iron -based soft magnetic alloy particle surface covers 2 coatings of mg (OH), iron -based soft magnetic alloy granule is spherical, square, sheet -like, needle -like, fibrous. The utility model discloses a specific electromagnetic wave absorbing structure can enough increase the width that the electromagnetic wave absorbs the frequency channel, can improve fire -retardant characteristic again, can wide application in electronic product anti -electromagnetic interference field.
Description
Technical field
The utility model relates to the wide band electromagnetic wave sorption complex with flame-retarding characteristic.
Background technology
The application of electromagnetism interference (EMI) material suppresses one of the most cost-effective means of electromagnetic interference in electronic devices and components, and it is formed through specific processes by absorbent and polymeric binder usually.Absorbent refers to and effectively can absorb incident electromagnetic wave, and the class material by power conversion electromagnetic energy being consumed or electromagnetic wave is disappeared because of interference.According to the difference of absorption mechanism, the lossy medium of absorbing material can be divided into resistor-type, dielectric type and magnetizing mediums type three class.Magnetic loss material comprises ferrite powder, metal powder and other nano material etc.They generally not only have dielectric loss but also have magnetic loss, are suitable as very much anti-EMI filter absorbing material, it is characterized in that: high magnetic permeability, high saturation magnetization and low coercive force.
Iron is the most basic magnetic element, and due to magnetic property excellence, rich reserves and cost advantage, ferrous alloy becomes one of most important wave absorbing agent.By suppressing formation and the eddy current of metallicl magnetic material closure domain, the anti-EMI filter performance of ghz band excellence can be obtained.But along with the increase of frequency, the eddy current loss that the low resistance of this kind of material causes limits its application at high frequency.Therefore, find a kind of technical scheme can expanded its electro-magnetic wave absorption frequency range and especially increase the assimilation effect of high band and seem particularly important.
On the other hand, the flame-retarding characteristic of electronic message unit is very necessary and crucial, because once breaking out of fire and the collapse causing electronic information will cause heavy losses.For absorbing material, the approach improving flame-retarding characteristic can be divided three classes: (1) carries out flame-retardant modified to wave absorbing agent; (2) design new polymer molecular structure and make it that there is essential high flame retardant; (3) fire retardant is added.Wherein, this method of the interpolation of fire retardant cost is lower and can realize fast.At present, fire retardant the most common is halogenated flame retardant, as TDE.But halogenated flame retardant exists and to have an impact this unavoidable problem to human body and environment always, cause its restriction being always subject to various countries' environmental protection instruction (as RoHS Directive 2002/95/EC specifies).Therefore, containing one of the exploitation important topic becoming industry development of the absorbing material of halogen-free type fire retardant.
Utility model content
The purpose of this utility model is to provide a kind of wide band electromagnetic wave sorption complex with flame-retarding characteristic, it adopts specific electromagnetic wave absorbing structure, the width of electro-magnetic wave absorption frequency range can either be increased, can flame-retarding characteristic be improved again, the field of electronic product electromagnetism interference can be widely used in.
For achieving the above object, the technical solution of the utility model is a kind of wide band electromagnetic wave sorption complex with flame-retarding characteristic of design, comprise polymer body, be evenly equipped with some iron-base soft magnetic alloy particles in described polymer body, described iron-base soft magnetic alloy particle surface covers Mg (OH)
2coating;
Described iron-base soft magnetic alloy particle is spherical, square, sheet shape, needle-like, threadiness.
Preferably, the dimension D of iron-base soft magnetic alloy particle
50be 1 ~ 500 micron, preferably 10 ~ 300 microns, be preferably 20 ~ 100 microns.
Preferably, described iron-base soft magnetic alloy particle comprises: FeSi, FeAl, FeSiAl, FeSiB, FeNi, FeCo.
Preferably, described Mg (OH)
2coating, its content is 0.1wt% ~ 30wt%.
Preferably, described polymer body adopts thermoplastic polymer, comprise: polyester resin, polyvinyl resin, Corvic, polypropylene, polystyrene, Merlon, nylon, epoxy resin, polyacrylics, polyurethane resin, polyvinyl butyral resin, PETG, polybutylene terephthalate (PBT), fiber-like resin, itrile group butadiene type rubber, styrene butadiene class rubber, butyl rubber, chlorinated polyethylene rubber, ethylene propylene rubber, acrylonitrile-butadiene rubber, polysulfide, acrylonitrile-butadiene-styrene copolymer, silicon rubber, natural rubber.
Advantage of the present utility model and beneficial effect are: provide a kind of wide band electromagnetic wave sorption complex with flame-retarding characteristic, it adopts specific electromagnetic wave absorbing structure, the width of electro-magnetic wave absorption frequency range can either be increased, can flame-retarding characteristic be improved again, the field of electronic product electromagnetism interference can be widely used in.
Electro-magnetic wave absorption complex of the present utility model, compared with identical weight percentage filling type wave-absorber, has wider absorption frequency range.
Electro-magnetic wave absorption complex of the present utility model, flame-retarding characteristic is improved significantly (with reference to UL94 standard testing).
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only for clearly the technical solution of the utility model being described, and can not limit protection range of the present utility model with this.
The technical scheme that the utility model is specifically implemented is:
As shown in Figure 1, a kind of wide band electromagnetic wave sorption complex with flame-retarding characteristic, comprises polymer body, is evenly equipped with some iron-base soft magnetic alloy particles 11 in described polymer body, described iron-base soft magnetic alloy particle 11 surface coverage Mg (OH)
2coating 13;
Described iron-base soft magnetic alloy particle 11 is spherical, square, sheet shape, needle-like, threadiness.
The dimension D of iron-base soft magnetic alloy particle 11
50be 1 ~ 500 micron, preferably 10 ~ 300 microns, be preferably 20 ~ 100 microns.
Described iron-base soft magnetic alloy particle 11 comprises: FeSi, FeAl, FeSiAl, FeSiB, FeNi, FeCo.
Described Mg (OH)
2coating 13, its content is 0.1wt% ~ 30wt%.
Described polymer body adopts thermoplastic polymer, comprise: polyester resin, polyvinyl resin, Corvic, polypropylene, polystyrene, Merlon, nylon, epoxy resin, polyacrylics, polyurethane resin, polyvinyl butyral resin, PETG, polybutylene terephthalate (PBT), fiber-like resin, itrile group butadiene type rubber, styrene butadiene class rubber, butyl rubber, chlorinated polyethylene rubber, ethylene propylene rubber, acrylonitrile-butadiene rubber, polysulfide, acrylonitrile-butadiene-styrene copolymer, silicon rubber, natural rubber.
Mg (OH)
2the resistivity of coating 13 can up to 1011 Ω/cm, and between magnetically soft alloy particle, increase suitable magnesium hydroxide coating can reduce magnetic action between particle, and increase resistance loss, this all contributes to the electro-magnetic wave absorption effect improving whole absorber.In addition, magnesium hydroxide is also a kind of filled-type fire retardant, discharges Bound moisture by during decomposes, absorbs a large amount of latent heat, reduce the surface temperature of synthetic material in flame that it fills, there is the effect suppressing polymer unwinds and cool produced fuel gas.Magnesium hydroxide (340 ~ 490 DEG C) when being heated decomposes, and the activated magnesia of generation is attached to the carrying out that combustible surface prevents again burning further.Magnesium hydroxide not only produces without any harmful substance in whole fire-retardant process, and its product decomposed can also absorb the macromolecule such as rubber, plastics while fire-retardant in a large number and to burn the pernicious gas and smog that produce, activated magnesia constantly absorbs imperfect combustion fusing residue, eliminating smog while stopping very soon from making burning, stoping molten drop, is a kind of good environmental protection inorganic fire retardant.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. there is the wide band electromagnetic wave sorption complex of flame-retarding characteristic, it is characterized in that:
Comprise polymer body, be evenly equipped with some iron-base soft magnetic alloy particles in described polymer body, described iron-base soft magnetic alloy particle surface covers Mg (OH)
2coating;
Described iron-base soft magnetic alloy particle is spherical, square, sheet shape, needle-like, threadiness.
2. the wide band electromagnetic wave sorption complex with flame-retarding characteristic according to claim 1, is characterized in that, the dimension D of iron-base soft magnetic alloy particle
50it is 1 ~ 500 micron.
3. the wide band electromagnetic wave sorption complex with flame-retarding characteristic according to claim 2, is characterized in that, the dimension D of iron-base soft magnetic alloy particle
50it is 10 ~ 300 microns.
4. the wide band electromagnetic wave sorption complex with flame-retarding characteristic according to claim 3, is characterized in that, the dimension D of iron-base soft magnetic alloy particle
50it is 20 ~ 100 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520550636.3U CN205196228U (en) | 2015-07-28 | 2015-07-28 | Wide band electromagnetic wave absorbs complex body with fire -retardant characteristic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520550636.3U CN205196228U (en) | 2015-07-28 | 2015-07-28 | Wide band electromagnetic wave absorbs complex body with fire -retardant characteristic |
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|---|---|
| CN205196228U true CN205196228U (en) | 2016-04-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025695A (en) * | 2015-07-28 | 2015-11-04 | 苏州驭奇材料科技有限公司 | Broadband electromagnetic wave absorption complex with flame-retarding characteristics and manufacturing method of complex |
-
2015
- 2015-07-28 CN CN201520550636.3U patent/CN205196228U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025695A (en) * | 2015-07-28 | 2015-11-04 | 苏州驭奇材料科技有限公司 | Broadband electromagnetic wave absorption complex with flame-retarding characteristics and manufacturing method of complex |
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| GR01 | Patent grant |