CN210725889U - Ultrathin flexible electromagnetic shielding film - Google Patents
Ultrathin flexible electromagnetic shielding film Download PDFInfo
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- CN210725889U CN210725889U CN201921932986.0U CN201921932986U CN210725889U CN 210725889 U CN210725889 U CN 210725889U CN 201921932986 U CN201921932986 U CN 201921932986U CN 210725889 U CN210725889 U CN 210725889U
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Abstract
The utility model discloses an ultrathin flexible electromagnetic shielding film, which comprises a release film layer and a wave-absorbing film layer, wherein the release film layer and the wave-absorbing film layer are positioned at the bottom layer, the thickness range of the wave-absorbing film layer is 20-35 microns, the wave-absorbing film layer adopts a polyvinyl fluoride film with the thickness range of 5-20 microns, the upper surface of the polyvinyl fluoride film is coated and solidified with a carboxyl iron powder coating with the thickness range of 5-20 microns, and a heat-conducting glue film layer with the thickness range of 3-25 microns is arranged between the release film layer and the polyvinyl fluoride film; the utility model discloses have very good flexibility, fish tail resistance and ageing resistance, it is excellent to inhale the wave effect moreover.
Description
Technical Field
The utility model belongs to electron shielding film field, concretely relates to ultra-thin flexible electromagnetic shielding film.
Background
With the rapid development of modern electronic industry, the number of various wireless communication systems and high-frequency electrical devices is rapidly increased, resulting in more and more problems of electromagnetic interference, electromagnetic pollution and the like. In order to solve the problems of electromagnetic interference and electromagnetic pollution, people propose to adopt an electromagnetic shielding film to realize the electromagnetic shielding function, and the main working principle of the electromagnetic shielding film is to adopt various shielding materials to effectively block and lose electromagnetic radiation.
The existing electromagnetic shielding film usually needs to adopt a viscose type composite film process, wherein, for the composite pasting between the functional layers, a middle viscose layer can be arranged, meanwhile, different functional layers need to be arranged for respectively realizing the functions of heat conduction, electromagnetic shielding and the like, so that the thickness of the shielding film is thicker, the heat conduction effect is poorer, and the existing electromagnetic shielding film also often adopts a copper foil as a wave absorbing layer, so that the whole flexibility of the electromagnetic shielding film is weaker.
Based on the applicant's intensive research and development experience in developing the electromagnetic shielding film, it is decided to seek a technical solution to solve the above technical problems.
Disclosure of Invention
In view of this, the utility model aims at providing an ultra-thin flexible electromagnetic shielding film has very good flexibility, anti fish tail and ageing resistance, and the absorbing effect is excellent moreover.
The utility model adopts the technical scheme as follows:
an ultrathin flexible electromagnetic shielding film comprises a release film layer and a wave-absorbing film layer which are positioned on a bottom layer and have the thickness range of 20-35 microns, wherein the wave-absorbing film layer is a polyvinyl fluoride film with the thickness range of 5-20 microns, a carboxyl iron powder coating with the thickness range of 5-20 microns is coated and solidified on the upper surface of the polyvinyl fluoride film, and a heat-conducting adhesive film layer with the thickness range of 3-25 microns is arranged between the release film layer and the polyvinyl fluoride film.
Preferably, the heat-conducting adhesive film layer is a heat-conducting silica gel layer, and the wave-absorbing film layer is coated and molded.
Preferably, the heat-conducting adhesive film layer is an EVA adhesive film layer, and is formed into an integral composite film structure with the polyfluortetraethylene film through direct hot-pressing composite molding.
Preferably, the release film layer is release paper.
Preferably, the outer surface of the carboxyl iron powder coating is provided with a white reflecting layer with the thickness ranging from 10 to 15 microns.
Preferably, the white reflecting layer is a white PET film.
The utility model relates to an EVA is the abbreviation of english ethylene-vinyl acetate copolymer, and wherein the literary expression is ethylene vinyl acetate copolymer, and PET is the abbreviation of english Polyethylene terephthalate, and wherein the literary expression is Polyethylene terephthalate.
The utility model discloses propose at polytetrafluoroethylene membrane upper surface coating solidification carboxyl iron powder coating for the first time, as electromagnetic shielding film's absorbing layer, wherein, the effect of carrier layer is not only played as carboxyl iron powder coating to the polytetrafluoroethylene membrane, simultaneously under very thin thickness (5-20 microns) scope, has very good flexibility, anti fish tail and ageing resistance, and then makes the utility model discloses realize ultra-thin and possess good flexible effect, moreover this applicant passes through the experimental discovery after verifying, and carboxyl iron powder coating is located the upper surface of polytetrafluoroethylene membrane, under the absorbing layer thickness condition that equals, the utility model discloses a wave-absorbing effect is obviously better than the carboxyl iron powder coating that has the same thickness, and wave-absorbing effect is excellent.
Drawings
Fig. 1 is a schematic structural diagram of an ultra-thin flexible electromagnetic shielding film 100 according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of an ultra-thin flexible electromagnetic shielding film 200 according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of an ultra-thin flexible electromagnetic shielding film 300 according to embodiment 3 of the present invention;
fig. 4 is a schematic structural view of the ultra-thin flexible electromagnetic shielding film 100' in comparative example 1 of the present invention.
Detailed Description
The embodiment of the utility model discloses ultra-thin flexible electromagnetic shielding film, including being located the bottom and its thickness scope 20-35 microns from the type rete with inhale the ripples rete, inhale the ripples rete and adopt its thickness scope at the polyfluortetraethylene membrane of 5-20 microns, and the upper surface coating solidification of polyfluortetraethylene membrane has its thickness scope at the carboxyl iron powder coating of 5-20 microns, and is equipped with the heat conduction rete that its thickness scope is 3-25 microns from between type rete and the polyfluortetraethylene membrane.
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Example 1: referring to fig. 1, an ultra-thin flexible electromagnetic shielding film 100 includes a release film layer 110 and a wave-absorbing film layer 120, which are located at a bottom layer and have a thickness range of 20-35 microns, the wave-absorbing film layer 120 adopts a polyvinyl fluoride film 121 having a thickness range of 5-20 microns, a carboxyl iron powder coating 122 having a thickness range of 5-20 microns is coated and cured on the upper surface of the polyvinyl fluoride film 121, and a heat-conductive adhesive film layer 130 having a thickness range of 3-25 microns is disposed between the release film layer 110 and the polyvinyl fluoride film 120; preferably, in this embodiment, the heat-conducting silica gel layer is used as the heat-conducting adhesive film layer 130, and the wave-absorbing film layer 120 is coated and formed, in other embodiments, a double-sided tape may be directly used, but the thickness of the double-sided tape is thicker than that of the heat-conducting silica gel layer formed by coating; preferably, in the present embodiment, the release film layer 110 is release paper.
Specifically, in this embodiment, the thickness of the polyvinyl fluoride film 121 is 10 micrometers, the thickness of the carboxyl iron powder coating layer 122 is 10 micrometers, the thickness of the heat conductive adhesive film layer 130 is 5 micrometers, and the thickness of the release film layer 110 is 25 micrometers.
Example 2: the remaining technical solutions of this embodiment 2 are the same as those of embodiment 1, except that in this embodiment 2, referring to the ultra-thin flexible electromagnetic shielding film 200 shown in fig. 2, the heat-conducting adhesive film 230 is formed by directly hot-pressing and compounding an EVA adhesive film layer with a thickness of 10 micrometers and a polyvinyl fluoride film 221 to form an integrated composite film structure.
Example 3: the remaining technical solutions of this embodiment 3 are the same as those of embodiment 1, except that in this embodiment 3, referring to fig. 3, a white reflective layer 340 with a thickness range of 10-15 μm is disposed on an outer surface of the carboxyl iron powder coating 322; preferably, in the present embodiment, the white reflective layer 340 employs a white PET film having a thickness of 10 μm.
Comparative example 1: the remaining technical solutions of comparative example 1 are the same as those of example 1, except that in comparative example 1, please refer to the ultra-thin flexible electromagnetic shielding film 100 'shown in fig. 4, the wave-absorbing film layer 120' adopts a carboxyl iron powder coating layer which is coated on the heat-conducting adhesive film layer 130 'and has a thickness of 20 micrometers, and the heat-conducting adhesive film layer 130' adopts a double-sided adhesive tape with a thickness of 20 micrometers.
The embodiment firstly proposes that a cured carboxyl iron powder coating is coated on the upper surface of a polyvinyl fluoride film to serve as a wave absorbing layer of an electromagnetic shielding film, wherein the polyvinyl fluoride film serves as a carrier layer and has very good flexibility, scratch resistance and aging resistance in a very thin thickness (5-20 microns), so that the embodiment achieves ultrathin and good flexibility effects.
The application also specifically detects the wave-absorbing effect performance of the implementation effects of the above examples 1 to 3 and the comparative example 1, and the test results refer to the following table 1:
table 1 comparison of the effects of the present application
As can be seen from table 1 above, the embodiment of the present application has very good electronic shielding effect.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The ultrathin flexible electromagnetic shielding film is characterized by comprising a release film layer and a wave-absorbing film layer which are positioned on a bottom layer and have the thickness range of 20-35 micrometers, wherein the wave-absorbing film layer is a polyvinyl fluoride film with the thickness range of 5-20 micrometers, a carboxyl iron powder coating with the thickness range of 5-20 micrometers is coated and solidified on the upper surface of the polyvinyl fluoride film, and a heat-conducting adhesive film layer with the thickness range of 3-25 micrometers is arranged between the release film layer and the polyvinyl fluoride film.
2. The ultra-thin flexible electromagnetic shielding film of claim 1, wherein the heat-conducting adhesive film layer is a heat-conducting silica gel layer, and is coated and molded on the wave-absorbing film layer.
3. The ultra-thin flexible electromagnetic shielding film according to claim 1, wherein the heat conductive adhesive film layer is an EVA adhesive film layer, and is directly hot-pressed and composite-molded with the polyvinyl fluoride film to form an integrated composite film structure.
4. The ultra-thin flexible electromagnetic shielding film according to claim 1, wherein the release film layer is release paper.
5. The ultra-thin flexible electro-magnetic shielding film of claim 1, wherein the outer surface of the carboxyl iron powder coating layer is provided with a white reflective layer having a thickness in the range of 10-15 μm.
6. The ultra-thin flexible electromagnetic shielding film of claim 5, wherein the white reflective layer is white PET film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921932986.0U CN210725889U (en) | 2019-11-11 | 2019-11-11 | Ultrathin flexible electromagnetic shielding film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921932986.0U CN210725889U (en) | 2019-11-11 | 2019-11-11 | Ultrathin flexible electromagnetic shielding film |
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| CN210725889U true CN210725889U (en) | 2020-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111787685A (en) * | 2020-07-30 | 2020-10-16 | 山东劲拓新材料科技有限公司 | Reflection-type electromagnetic shielding film for FPC and preparation method thereof |
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2019
- 2019-11-11 CN CN201921932986.0U patent/CN210725889U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111787685A (en) * | 2020-07-30 | 2020-10-16 | 山东劲拓新材料科技有限公司 | Reflection-type electromagnetic shielding film for FPC and preparation method thereof |
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