CN105459462A - Composite type electromagnetic wave absorbing film - Google Patents
Composite type electromagnetic wave absorbing film Download PDFInfo
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- CN105459462A CN105459462A CN201410450320.7A CN201410450320A CN105459462A CN 105459462 A CN105459462 A CN 105459462A CN 201410450320 A CN201410450320 A CN 201410450320A CN 105459462 A CN105459462 A CN 105459462A
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- adhesive layer
- wave absorbing
- electromagnetic wave
- prismatic protrusions
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Abstract
The invention discloses a composite type electromagnetic wave absorbing film. The composite type electromagnetic wave absorbing film comprises a composite metallic layer, a wave absorbing layer and a release material layer; a first adhesive layer is arranged between a PET insulating layer and the composite metallic layer, a second adhesive layer is arranged between the composite metallic layer and the wave absorbing layer, and the composite metallic layer is made from a copper layer and an aluminum foil layer through laminating, a surface, in contact with the wave absorbing layer, of the composite metallic layer has a plurality of first prismatic bulge portions and second prismatic bulge portions, the height of the first prismatic bulge portions is greater than that of the second prismatic bulge portions, and the first prismatic bulge portions and the second prismatic bulge portions are arranged alternately; a third adhesive layer, a polypropylene film layer and a fourth adhesive layer are sequentially arranged between the wave absorbing layer and the release material layer; and the top of each of the first and second prismatic bulge portions is of an arc face. According to the composite type electromagnetic wave absorbing film disclosed by the invention, the utilization ratio of electromagnetic field reflection of the composite metallic layer is increased, the wave absorbing performance of pressure-sensitive adhesive tapes is remarkably improved, the dissipation of heat is facilitated, the upwarping of the film caused by temperature rise is avoided, and the stability of product performance is improved.
Description
Technical field
The invention belongs to technical field of electronic materials, particularly relate to a kind of composite electromagnetic wave absorbing film.
Background technology
Along with the application of electronic product is more and more wider, electronic product operationally generates electromagnetic waves usually.In order to reduce electromagnetic interference, one is needed to have the suction ripple film inhaling wave energy.At present, microminiaturized, Highgrade integration is the main trend of electronic product development, and the inner space of these products is relatively narrow and small.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.Therefore, design and develop that thickness is thin, quality is light, be applicable to small space, improves the utilization rate electromagnetic wave absorbent material of complex metal layer reflection of electromagnetic, becomes the direction that those skilled in the art make great efforts.
Summary of the invention
The invention provides a kind of composite electromagnetic wave absorbing film, this composite electromagnetic wave absorbing film improves the utilization rate of complex metal layer reflection of electromagnetic, significantly improve the absorbing property of pressure-sensitive tape, and be conducive to heat diffusion, also avoid, because temperature rise causes film to upwarp, improve the stability of properties of product.
For achieving the above object, the technical solution used in the present invention is: a kind of composite electromagnetic wave absorbing film, comprises complex metal layer, inhales ripple layer and separated type material layer; The first adhesive layer is provided with between PET insulating barrier and complex metal layer, the second adhesive layer is provided with between described complex metal layer and suction ripple layer, described complex metal layer is superposed by layers of copper and aluminium foil layer and forms, the surface that described complex metal layer contacts with suction ripple layer has several the first prismatic protrusions portions, the first prismatic protrusions portion, the height in described first prismatic protrusions portion is greater than the height in the second prismatic protrusions portion, and the first prismatic protrusions portion and the second prismatic protrusions portion are alternately arranged; The 3rd adhesive layer, layer of polypropylene foil and the 4th adhesive layer is disposed with between described suction ripple layer and separated type material layer; The surface that described 4th adhesive layer contacts with separated type material layer has several salient points; This first prismatic protrusions portion, the second prismatic protrusions portion are arc surface in top separately, and the radian of this arc surface is 15 ° ~ 35 °.
The technical scheme improved further in technique scheme is as follows:
1, in such scheme, the thickness of described first adhesive layer is less than the thickness of the second adhesive layer, and the thickness of described second adhesive layer is less than the 3rd adhesive layer.
2, in such scheme, the Thickness Ratio of described PET insulating barrier and layer of polypropylene foil is 10:4 ~ 6.
3, in such scheme, the average height of described salient point is 3.8 microns ~ 10 microns.
Because technique scheme is used, the present invention compared with prior art has following advantages:
Composite electromagnetic wave absorbing film of the present invention, it is superposed the complex metal layer that forms and inhales the surface that ripple layer contacts and have several the first prismatic protrusions portions by layers of copper and aluminium foil layer, first prismatic protrusions portion, the height in described first prismatic protrusions portion is greater than the height in the second prismatic protrusions portion, improve the utilization rate of complex metal layer reflection of electromagnetic, arranging of complex metal layer can form re-absorption effect, significantly improve the absorbing property of pressure-sensitive tape, simultaneously, due to electromagnetic wave absorption a large amount of in use, temperature can be caused to raise, this metal level with several prismatic protrusions portions, avoid the too concentrated of heat, be conducive to heat diffusion, also avoid because temperature rise causes film to upwarp, improve the stability of properties of product, secondly, its first prismatic protrusions portion, the first prismatic protrusions portion are arc surface in top separately, and the radian of this arc surface is 15 ° ~ 35 °, decreases the interference between light and light, further increases absorbing property, secondly, it is inhaled between ripple layer and separated type material layer and is disposed with the 3rd adhesive layer, layer of polypropylene foil and the 4th adhesive layer, has increased substantially the effect that its proof voltage punctures, has also improved and inhale ripple film strength, again, the surface that its 4th adhesive layer contacts with separated type material layer has several salient points, the discharge of gas when being conducive to fitting, thus avoids the generation of bubble.
Accompanying drawing explanation
Accompanying drawing 1 is composite electromagnetic wave absorbing film structural representation of the present invention;
Accompanying drawing 2 is comparative example pressure-sensitive tape structural representation.
In above accompanying drawing: 1, salient point; 2, complex metal layer; 21, layers of copper; 22, aluminium foil layer; 3, ripple layer is inhaled; 4, separated type material layer; 5, layer of polypropylene foil; 6, the second adhesive layer; 7, the 3rd adhesive layer; 81, the first prismatic protrusions portion; 82, the second prismatic protrusions portion; 9, the 4th adhesive layer; 10, arc surface.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1: a kind of composite electromagnetic wave absorbing film, comprises complex metal layer 2, inhales ripple layer 3 and separated type material layer 4; The first adhesive layer 5 is provided with between PET insulating barrier 1 and complex metal layer 2, the second adhesive layer 6 is provided with between described complex metal layer 2 and suction ripple layer 3, described complex metal layer 2 is superposed by layers of copper 21 and aluminium foil layer 22 and forms, the surface that described complex metal layer 2 contacts with suction ripple layer 3 has several prismatic protrusions portions 82 of the first prismatic protrusions portion 81, first, the height in described first prismatic protrusions portion 81 is greater than the height in the second prismatic protrusions portion 82, and the first prismatic protrusions portion 81 and the second prismatic protrusions portion 82 are alternately arranged; The 3rd adhesive layer 7, layer of polypropylene foil 5 and the 4th adhesive layer 9 is disposed with between described suction ripple layer 3 and separated type material layer 4; The surface that described 4th adhesive layer 9 contacts with separated type material layer 4 has several salient points 1; This prismatic protrusions portion 82 of the first prismatic protrusions portion 81, second is arc surface 10 in top separately, and the radian of this arc surface is 25 °.
Above-mentioned PET insulating barrier 1 is 10:6 with the Thickness Ratio of layer of polypropylene foil 5; The average height of above-mentioned salient point 1 is 8 microns.
Inhale ripple layer by soft magnetic powder and macromolecule matrix is mixing forms, the electromagnetic wave discharged by electronic product 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 insulating barrier 1 thickness is 6 microns; Described PET insulating barrier 1 is 10:5 with the Thickness Ratio of layer of polypropylene foil 5.
Embodiment 2: a kind of composite electromagnetic wave absorbing film, comprises complex metal layer 2, inhales ripple layer 3 and separated type material layer 4; The first adhesive layer 5 is provided with between PET insulating barrier 1 and complex metal layer 2, the second adhesive layer 6 is provided with between described complex metal layer 2 and suction ripple layer 3, described complex metal layer 2 is superposed by layers of copper 21 and aluminium foil layer 22 and forms, the surface that described complex metal layer 2 contacts with suction ripple layer 3 has several prismatic protrusions portions 82 of the first prismatic protrusions portion 81, first, the height in described first prismatic protrusions portion 81 is greater than the height in the second prismatic protrusions portion 82, and the first prismatic protrusions portion 81 and the second prismatic protrusions portion 82 are alternately arranged; The 3rd adhesive layer 7, layer of polypropylene foil 5 and the 4th adhesive layer 9 is disposed with between described suction ripple layer 3 and separated type material layer 4; The surface that described 4th adhesive layer 9 contacts with separated type material layer 4 has several salient points 1; This prismatic protrusions portion 82 of the first prismatic protrusions portion 81, second is arc surface 10 in top separately, and the radian of this arc surface is 32 °.
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 insulating barrier 1 is 10:5 with the Thickness Ratio of layer of polypropylene foil 5; The height of above-mentioned salient point 1 is 5 microns.
Inhale ripple layer by soft magnetic powder and macromolecule matrix is mixing forms, the electromagnetic wave discharged by electronic product 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 insulating barrier 1 thickness is 8 microns; Described first adhesive layer 5, second adhesive layer 6 and the 3rd adhesive layer 7 are esters of acrylic acid adhesive layer; Described PET insulating barrier 1 is 10:4 with the Thickness Ratio of layer of polypropylene foil 5.
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.The average height of described salient point 1 is 4.8 microns ~ 5 microns.
When adopting above-mentioned composite electromagnetic wave absorbing film, it is superposed the complex metal layer that forms and inhales the surface that ripple layer contacts and have several the first prismatic protrusions portions by layers of copper and aluminium foil layer, first prismatic protrusions portion, the height in described first prismatic protrusions portion is greater than the height in the second prismatic protrusions portion, improve the utilization rate of complex metal layer reflection of electromagnetic, arranging of complex metal layer can form re-absorption effect, significantly improve the absorbing property of pressure-sensitive tape, simultaneously, due to electromagnetic wave absorption a large amount of in use, temperature can be caused to raise, this metal level with several prismatic protrusions portions, avoid the too concentrated of heat, be conducive to heat diffusion, also avoid because temperature rise causes film to upwarp, improve the stability of properties of product, secondly, its first prismatic protrusions portion, the first prismatic protrusions portion are arc surface in top separately, and the radian of this arc surface is 15 ° ~ 35 °, decreases the interference between light and light, further increases absorbing property, again, it is inhaled between ripple layer and separated type material layer and is disposed with the 3rd adhesive layer, layer of polypropylene foil and the 4th adhesive layer, has increased substantially the effect that its proof voltage punctures, has also improved and inhale ripple film strength, again, the surface that its 4th adhesive layer contacts with separated type material layer has several salient points, the discharge of gas when being conducive to fitting, thus avoids the generation of bubble.
Comparative example 1: a kind of composite electromagnetic wave absorbing film, comprises complex metal layer 2, inhales ripple layer 3 and separated type material layer 4; Be provided with the first adhesive layer 5 between PET insulating barrier 1 and complex metal layer 2, be provided with the second adhesive layer 6 between described complex metal layer 2 and suction ripple layer 3, described complex metal layer 2 is superposed by layers of copper 21 and aluminium foil layer 22 and forms; The 3rd adhesive layer 7, layer of polypropylene foil 5 and the 4th adhesive layer 9 is disposed with between described suction ripple layer 3 and separated type material layer 4; The surface that described 4th adhesive layer 9 contacts with separated type material layer 4 has several salient points 1.
Comparative example 2: a kind of composite electromagnetic wave absorbing film, comprises complex metal layer 2, inhales ripple layer 3 and separated type material layer 4; Be provided with the first adhesive layer 5 between PET insulating barrier 1 and metal copper layer, between described metal copper layer and suction ripple layer 3, be provided with the second adhesive layer 6; The 3rd adhesive layer 7, layer of polypropylene foil 5 and the 4th adhesive layer 9 is disposed with between described suction ripple layer 3 and separated type material layer 4; The surface that described 4th adhesive layer 9 contacts with separated type material layer 4 has several salient points 1.
The arc method of testing of reflectivity is adopted to detect, test performance: in 2GHZ-4GHZ frequency range, absorbing property is as follows:
| Inhale ripple layer thickness | 100μm | 200μm | 500μm | 1㎜ | 2㎜ | 5㎜ |
| Comparative example 1 | -1.5dB | -2.3dB | -3.2 dB | -5 dB | -8.3 dB | -11.1 dB |
| Comparative example 2 | -1.5dB | -2.2 dB | -3.2dB | -4.8 dB | -8.3 dB | -11dB |
| Embodiment 1 | -2.9dB | -3.8dB | -5.6 dB | -7.5dB | -10.8dB | -14dB |
| Embodiment 2 | -2.8dB | -3.9 dB | -5.8 dB | -7.3 dB | -10.7 dB | -13.8 dB |
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 Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (4)
1. a composite electromagnetic wave absorbing film, is characterized in that: comprise complex metal layer (2), inhale ripple layer (3) and separated type material layer (4), the first adhesive layer (5) is provided with between PET insulating barrier (1) and complex metal layer (2), the second adhesive layer (6) is provided with between described complex metal layer (2) and suction ripple layer (3), described complex metal layer (2) is superposed by layers of copper (21) and aluminium foil layer (22) and forms, the surface that this complex metal layer (2) contacts with suction ripple layer (3) has several the first prismatic protrusions portions (81), second prismatic protrusions portion (82), the height in described first prismatic protrusions portion (81) is greater than the height in the second prismatic protrusions portion (82), first prismatic protrusions portion (81) and the second prismatic protrusions portion (82) are alternately arranged, the 3rd adhesive layer (7), layer of polypropylene foil (5) and the 4th adhesive layer (9) is disposed with between described suction ripple layer (3) and separated type material layer (4), the surface that described 4th adhesive layer (9) contacts with separated type material layer (4) has several salient points (1), this the first prismatic protrusions portion (81), the second prismatic protrusions portion (82) are arc surface (10) in top separately, and the radian of this arc surface is 15 ° ~ 35 °.
2. composite electromagnetic wave absorbing film according to claim 1, is characterized in that: the thickness of described 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).
3. composite electromagnetic wave absorbing film according to claim 1, is characterized in that: described PET insulating barrier (1) is 10:4 ~ 6 with the Thickness Ratio of layer of polypropylene foil (5).
4. composite electromagnetic wave absorbing film according to claim 1, is characterized in that: the average height of described salient point (1) is 3.8 microns ~ 10 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450320.7A CN105459462A (en) | 2014-09-04 | 2014-09-04 | Composite type electromagnetic wave absorbing film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450320.7A CN105459462A (en) | 2014-09-04 | 2014-09-04 | Composite type electromagnetic wave absorbing film |
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| CN105459462A true CN105459462A (en) | 2016-04-06 |
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| CN201410450320.7A Pending CN105459462A (en) | 2014-09-04 | 2014-09-04 | Composite type electromagnetic wave absorbing film |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1849621A2 (en) * | 2000-01-21 | 2007-10-31 | JDS Uniphase Corporation | Optically variable security devices |
| CN202936363U (en) * | 2012-12-05 | 2013-05-15 | 苏州斯迪克新材料科技股份有限公司 | Self-stripping protective pasting film |
| CN203095967U (en) * | 2013-02-18 | 2013-07-31 | 苏州斯迪克新材料科技股份有限公司 | Adhering film applied to electronic products |
| CN103889197A (en) * | 2012-12-21 | 2014-06-25 | 财团法人工业技术研究院 | Shielding composite membrane |
| CN204183968U (en) * | 2014-09-04 | 2015-03-04 | 斯迪克新型材料（江苏）有限公司 | Composite electromagnetic wave absorbing film |
-
2014
- 2014-09-04 CN CN201410450320.7A patent/CN105459462A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1849621A2 (en) * | 2000-01-21 | 2007-10-31 | JDS Uniphase Corporation | Optically variable security devices |
| CN202936363U (en) * | 2012-12-05 | 2013-05-15 | 苏州斯迪克新材料科技股份有限公司 | Self-stripping protective pasting film |
| CN103889197A (en) * | 2012-12-21 | 2014-06-25 | 财团法人工业技术研究院 | Shielding composite membrane |
| CN203095967U (en) * | 2013-02-18 | 2013-07-31 | 苏州斯迪克新材料科技股份有限公司 | Adhering film applied to electronic products |
| CN204183968U (en) * | 2014-09-04 | 2015-03-04 | 斯迪克新型材料（江苏）有限公司 | Composite electromagnetic wave absorbing film |
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Application publication date: 20160406 |