CN104893606A - Broadband wave-absorbing film - Google Patents
Broadband wave-absorbing film Download PDFInfo
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- CN104893606A CN104893606A CN201510260694.7A CN201510260694A CN104893606A CN 104893606 A CN104893606 A CN 104893606A CN 201510260694 A CN201510260694 A CN 201510260694A CN 104893606 A CN104893606 A CN 104893606A
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Abstract
The invention discloses a broadband wave-absorbing film which comprises an insulating layer, a wave-absorbing layer used as a reflecting layer, an absorber and a release material layer. A first adhesive layer is arranged between the insulating layer and the wave-absorbing layer. A second adhesive layer is arranged between the wave-absorbing layer and the absorber. A third adhesive layer is disposed between the absorber and the release material layer. The absorber is composed of the following ingredients: 100 parts of a wave-absorbing powder, 20-35 parts of butyl acrylate, 10-20 parts of acrylic acid, 20-35 parts of 2-ethylhexyl acrylate, 10-30 parts of methyl methacrylate, 1-3 parts of vinyl acetate, 0.1-1 part of methacrylic acid-2-hydroxyl ethyl, 0.5-2 parts of sodium polyacrylat and 0.4-1 part of methylethyl ketone peroxide. The broadband wave-absorbing film has a strong electromagnetic wave absorption characteristic. Attenuation rate reaches 85% at 2-10 GHz of electromagnetic wave, and heat-conducting property of the whole wave-absorbing layer is also raised, thus being beneficial to diffusion of heat generated by electromagnetic wave. Performance stability is improved, and service life of the product is prolonged.
Description
Technical field
The invention belongs to technical field of electronic materials, particularly relate to a kind of wide-band and wave-absorbing pad pasting.
Background technology
Along with the development of electron trade, increasing electric equipment products has come into the life of people, and the impact of the Electromagnetic Radiation on Environment that these products bring also increases day by day.The hertzian wave of electronic product release, brings electromagnetic interference can to other electronics of surrounding, make its operation irregularity; Also can work the mischief to HUMAN HEALTH simultaneously.Therefore, research and development can weaken the absorbing material of electromagnetic radiation, have become the heat subject that Materials science is paid close attention to.
Absorbing material refers to and effectively can absorb incident electromagnetic wave and the class material making it decay, and incident electromagnetic wave to be changed into heat energy or other form of energy to reach the object of inhaling ripple by different losses mechanism by it.In absorbing material, patch-type absorbing material thickness is thin, easy to use, for reduction electromagnetic radiation, prevents electromagnetic interference from having good effect, is relatively applicable to being applied in electronic product.And the main trend of electronic product development is microminiaturized, Highgrade integration, interiors of products space is relatively narrow and small.Therefore, under the prerequisite ensureing absorbing property, how material is manufactured to obtain face the biggest problem of the enough thin people of being.
Summary of the invention
The invention provides a kind of wide-band and wave-absorbing pad pasting, this wide-band and wave-absorbing pad pasting has stronger electromaganic wave absorbing property, 85% is reached in the electromagnetic rate of fall-off of 2 ~ 10GHz, also improve the heat conductivility of whole suction ripple layer, be conducive to the heat expanding produced by hertzian wave, improve stability and product work-ing life of performance.
For achieving the above object, the technical solution used in the present invention is: a kind of wide-band and wave-absorbing pad pasting, comprise insulation layer, as reflecting layer graphite flake, inhale ripple and separated type material layer; The first adhesive layer is provided with between described insulation layer, graphite flake; The second adhesive layer is provided with between described graphite flake, suction ripple; The 3rd adhesive layer is provided with between described suction ripple, separated type material layer;
Described suction ripple layer is composed of the following components:
Wave-absorbing powder 100 parts,
Butyl acrylate 20 ~ 35 parts,
10 ~ 20 parts, vinylformic acid,
Isooctyl acrylate monomer 20 ~ 35 parts,
Methyl methacrylate 10 ~ 30 parts,
Vinyl acetate between to for plastic 1 ~ 3 part,
2-hydroxyethyl methacrylate 0.1 ~ 1 part,
Sodium polyacrylate 0.5 ~ 2 part,
Methylethyl ketone peroxide 0.4 ~ 1 part;
Described wave-absorbing powder is composed of the following components:
BaFe
12o
19100 parts,
Nickel sesquioxide 38 ~ 42 parts,
Nano graphite powder 9 ~ 12 parts,
Naphthoic acid cobalt 18 ~ 22 parts,
Unsaturated polyester 50 ~ 60 parts,
Acrylic acid or the like flow agent 40 ~ 50 parts.
The technical scheme improved further in technique scheme is as follows:
1, in such scheme, BaFe in described wave-absorbing powder
12o
19, nickel sesquioxide, Nano graphite powder and naphthoic acid cobalt mix according to 10:4:1:2 weight ratio.
2, in such scheme, described separated type material layer is off-style paper layer or release film layer.
3, in such scheme, described first adhesive layer, the second adhesive layer, the 3rd adhesive layer are esters of acrylic acid adhesive layer.
4, in such scheme, described unsaturated polyester is formed by the synthesis of MALEIC ANHYDRIDE, Tetra hydro Phthalic anhydride and propylene glycol.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, wide-band and wave-absorbing pad pasting of the present invention, it is inhaled ripple layer and adopts composite wave-absorbing powder BaFe
12o
19100 parts, nickel sesquioxide, Nano graphite powder, naphthoic acid cobalt and butyl acrylate 20 ~ 35 parts, 10 ~ 20 parts, vinylformic acid, Isooctyl acrylate monomer 20 ~ 35 parts, methyl methacrylate 10 ~ 30, vinyl acetate between to for plastic 1 ~ 3, 2-hydroxyethyl methacrylate 0.1 ~ 1 part synergy, there is stronger electromaganic wave absorbing property, 85% is reached in the electromagnetic rate of fall-off of 2 ~ 10GHz, further interpolation sodium polyacrylate 0.5 ~ 2 part, methylethyl ketone peroxide 0.4 ~ 1 part, both be conducive to polymer latex to glue, also mixed powder is made to be uniformly dispersed in the polymer, thus ensure that the reliability of electromagnetic performance, secondly, be equipped with unsaturated polyester in formula further, heat conductivility that acrylic acid or the like flow agent improves whole suction ripple layer, be conducive to the heat expanding produced by hertzian wave, improve stability and product work-ing life of performance.
2, wide-band and wave-absorbing pad pasting of the present invention, it comprise insulation layer, as reflecting layer suction ripple layer, inhale ripple and separated type material layer; The first adhesive layer is provided with between described insulation layer, suction ripple layer; The second adhesive layer is provided with between described suction ripple layer, suction ripple; The 3rd adhesive layer is provided with between described suction ripple, separated type material layer; Material thickness is very thin, and general thickness is less than 0.8mm; Arranging of reflecting layer can form re-absorption effect, significantly improves the absorbing property of material; The setting of insulation layer improves the outward appearance of inhaling ripple paster, and makes it while effective electromagnetic wave absorption, improve its proof voltage to puncture effect.
Accompanying drawing explanation
Accompanying drawing 1 is wide-band and wave-absorbing film structure schematic diagram of the present invention.
In above accompanying drawing: 1, insulation layer; 2, graphite flake; 3, ripple is inhaled; 4, separated type material layer; 5, the first adhesive layer; 6, the second adhesive layer; 7, the 3rd adhesive layer.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1 ~ 4: a kind of wide-band and wave-absorbing pad pasting, comprise insulation layer 1, as reflecting layer graphite flake 2, inhale ripple 3 and separated type material layer 4; The first adhesive layer 5 is provided with between described insulation layer 1, graphite flake 2; The second adhesive layer 6 is provided with between described graphite flake 2, suction ripple 3; The 3rd adhesive layer 7 is provided with between described suction ripple 3, separated type material layer 4;
Component and the content of described suction ripple layer 3 are as shown in table 1:
Table 1
The composition of content component as shown in Table 2 of described wave-absorbing powder:
Table 2
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| BaFe 12O 19 | 100 parts | 100 parts | 100 parts | 100 parts |
| Nickel sesquioxide | 38 parts | 40 parts | 42 parts | 40 parts |
| Nano graphite powder | 12 parts | 10 parts | 9 parts | 10 parts |
| Naphthoic acid cobalt | 19 parts | 20 parts | 22 parts | 20 parts |
| Unsaturated polyester | 52 parts | 60 parts | 55 parts | 50 parts |
| Acrylic acid or the like flow agent | 40 parts | 50 parts | 48 parts | 42 parts |
The thickness of above-mentioned first adhesive layer 5 is less than the thickness of the second adhesive layer 6, and the thickness of described second adhesive layer 7 is less than the 3rd adhesive layer 7.
Above-mentioned PET insulation layer 1 is 10:4 ~ 6 with the Thickness Ratio of layer of polypropylene foil 10.
Above-mentioned unsaturated polyester is formed by the synthesis of MALEIC ANHYDRIDE, Tetra hydro Phthalic anhydride and propylene glycol.
Embodiment 1 ~ 4 the maximum reflection coefficient of 2 ~ 18GHz frequency range and effective bandwidth as shown in table 3:
Table 3
| Inhale ripple layer thickness | Maximum reflection coefficient (dB) | ≤-8 dB effective bandwidths (GHz) | |
| Embodiment 1 | 0.2mm | -21 | 2~13 |
| Embodiment 2 | 0.4mm | -23 | 2~15 |
| Embodiment 3 | 0.6mm | -30 | 2~16 |
| Embodiment 4 | 0.8mm | -35 | 2~18 |
The hertzian wave that electronic product discharges by suction ripple layer converts the energy of heat energy or other form to reach the effect reducing electromagnetic radiation in the mode such as electrical loss, magnetic loss, within the scope of 2 ~ 18GHz, there is good absorption, the reflection of electromagnetic wave resorption ripple layer of incidence can be formed re-absorption effect.
Above-mentioned PET insulation layer 1 thickness is 6 microns; Described PET insulation layer 1 is 10:5 with the Thickness Ratio of layer of polypropylene foil 10.
Inhale the preparation technology of ripple layer in above-described embodiment wide-band and wave-absorbing pad pasting, comprise the following steps:
The first step: by BaFe
12o
19100 parts, nickel sesquioxide 38 ~ 42 parts, Nano graphite powder 9 ~ 12 parts, naphthoic acid cobalt 18 ~ 22 parts, unsaturated polyester 50 ~ 60 parts, acrylic acid or the like flow agent 40 ~ 50 parts mix, and stir 84 ~ 86 DEG C of conditions and form mixed powders;
Second step: butyl acrylate 20 ~ 35 parts, 10 ~ 20 parts, vinylformic acid, Isooctyl acrylate monomer 20 ~ 35 parts, methyl methacrylate 10 ~ 30, vinyl acetate between to for plastic 1 ~ 3,2-hydroxyethyl methacrylate 0.1 ~ 1 part, sodium polyacrylate 0.5 ~ 2 part are mixed with the mixed powder of the first step, and through high speed agitator dispersion 1 ~ 2 hour, thus mix formation mixture;
3rd step: be incubated after in a kettle. the mixture of second step being heated to 80 ~ 85 DEG C, divide in insulating process and add methylethyl ketone peroxide 0.4 ~ 1 part acquisition suction ripple mixed solution for 1 ~ 3 time, described soaking time is 4 ~ 10 hours;
4th step: the suction ripple mixed solution that the 3rd step obtains is coated on substrate;
5th step: baking is carried out to the suction ripple mixed solution in the 4th step and forms suction ripple layer.
When adopting the above-mentioned suction ripple paster for electronic product, wide-band and wave-absorbing pad pasting has stronger electromaganic wave absorbing property, 85% is reached in the electromagnetic rate of fall-off of 2 ~ 10GHz, also improve the heat conductivility of whole suction ripple layer, be conducive to the heat expanding produced by hertzian wave, improve stability and product work-ing life of performance.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to spirit of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (5)
1. a wide-band and wave-absorbing pad pasting, is characterized in that: comprise insulation layer (1), as reflecting layer graphite flake (2), inhale ripple (3) and separated type material layer (4); The first adhesive layer (5) is provided with between described insulation layer (1), graphite flake (2); The second adhesive layer (6) is provided with between described graphite flake (2), suction ripple (3); The 3rd adhesive layer (7) is provided with between described suction ripple (3), separated type material layer (4);
Described suction ripple (3) is composed of the following components:
Wave-absorbing powder 100 parts,
Butyl acrylate 20 ~ 35 parts,
10 ~ 20 parts, vinylformic acid,
Isooctyl acrylate monomer 20 ~ 35 parts,
Methyl methacrylate 10 ~ 30 parts,
Vinyl acetate between to for plastic 1 ~ 3 part,
2-hydroxyethyl methacrylate 0.1 ~ 1 part,
Sodium polyacrylate 0.5 ~ 2 part,
Methylethyl ketone peroxide 0.4 ~ 1 part;
Described wave-absorbing powder is composed of the following components:
BaFe
12o
19100 parts,
Nickel sesquioxide 38 ~ 42 parts,
Nano graphite powder 9 ~ 12 parts,
Naphthoic acid cobalt 18 ~ 22 parts,
Unsaturated polyester 50 ~ 60 parts,
Acrylic acid or the like flow agent 40 ~ 50 parts.
2. wide-band and wave-absorbing pad pasting according to claim 1, is characterized in that: BaFe in described wave-absorbing powder
12o
19, nickel sesquioxide, Nano graphite powder and naphthoic acid cobalt mix according to 10:4:1:2 weight ratio.
3. wide-band and wave-absorbing pad pasting according to claim 1, is characterized in that: described separated type material layer (4) is off-style paper layer or release film layer.
4. wide-band and wave-absorbing pad pasting according to claim 1, is characterized in that: described first adhesive layer (5), the second adhesive layer (6), the 3rd adhesive layer (7) are esters of acrylic acid adhesive layer.
5. wide-band and wave-absorbing pad pasting according to claim 1, is characterized in that: described unsaturated polyester is formed by the synthesis of MALEIC ANHYDRIDE, Tetra hydro Phthalic anhydride and propylene glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260694.7A CN104893606A (en) | 2015-05-21 | 2015-05-21 | Broadband wave-absorbing film |
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|---|---|---|---|
| CN201510260694.7A CN104893606A (en) | 2015-05-21 | 2015-05-21 | Broadband wave-absorbing film |
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| CN104893606A true CN104893606A (en) | 2015-09-09 |
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| CN201510260694.7A Pending CN104893606A (en) | 2015-05-21 | 2015-05-21 | Broadband wave-absorbing film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561163A (en) * | 2022-03-24 | 2022-05-31 | 苏州益邦电子材料有限公司 | Inhale ripples insulating piece and insulating piece coil stock convenient to prevent slow-witted detection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54121046A (en) * | 1978-03-13 | 1979-09-19 | Tdk Corp | Electric wave absorbing material |
| CN203105050U (en) * | 2013-02-18 | 2013-07-31 | 苏州斯迪克新材料科技股份有限公司 | Wave absorbing patch for electronic product |
| CN103740233A (en) * | 2014-01-08 | 2014-04-23 | 南京信息工程大学 | Micrometer wave absorbing coating material and preparation method thereof |
| CN103923337A (en) * | 2014-04-30 | 2014-07-16 | 湖南兆恒材料科技有限公司 | Composite polymethacrylimide foam wave absorption material |
| CN104302159A (en) * | 2014-09-04 | 2015-01-21 | 苏州斯迪克新材料科技股份有限公司 | Wideband multi-use wave absorbing film |
-
2015
- 2015-05-21 CN CN201510260694.7A patent/CN104893606A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54121046A (en) * | 1978-03-13 | 1979-09-19 | Tdk Corp | Electric wave absorbing material |
| CN203105050U (en) * | 2013-02-18 | 2013-07-31 | 苏州斯迪克新材料科技股份有限公司 | Wave absorbing patch for electronic product |
| CN103740233A (en) * | 2014-01-08 | 2014-04-23 | 南京信息工程大学 | Micrometer wave absorbing coating material and preparation method thereof |
| CN103923337A (en) * | 2014-04-30 | 2014-07-16 | 湖南兆恒材料科技有限公司 | Composite polymethacrylimide foam wave absorption material |
| CN104302159A (en) * | 2014-09-04 | 2015-01-21 | 苏州斯迪克新材料科技股份有限公司 | Wideband multi-use wave absorbing film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561163A (en) * | 2022-03-24 | 2022-05-31 | 苏州益邦电子材料有限公司 | Inhale ripples insulating piece and insulating piece coil stock convenient to prevent slow-witted detection |
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Address after: 223900 Sihong Province Economic Development Zone, Suqian, West Ocean West Road, No. 6 Applicant after: Jiangsu Stick new materials Polytron Technologies Inc Address before: 215400 Taicang, Suzhou, Taicang Economic Development Zone, Qingdao West Road, No. 11, No. Applicant before: Suzhou Sidike New Material Science & Technology Co., Ltd. |
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Application publication date: 20150909 |
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