CN108239491A - Electro-magnetic wave absorption film - Google Patents

Electro-magnetic wave absorption film Download PDF

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Publication number
CN108239491A
CN108239491A CN201711439503.9A CN201711439503A CN108239491A CN 108239491 A CN108239491 A CN 108239491A CN 201711439503 A CN201711439503 A CN 201711439503A CN 108239491 A CN108239491 A CN 108239491A
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layer
parts
wave
adhesive layer
electro
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金闯
梁豪
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Jiangsu Stick New Materials Polytron Technologies Inc
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Jiangsu Stick New Materials Polytron Technologies Inc
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Priority to CN201711439503.9A priority Critical patent/CN108239491A/en
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    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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  • Chemical & Material Sciences (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • Polymers & Plastics (AREA)
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  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention discloses a kind of electro-magnetic wave absorption film, including metal layer, inhales wave layer and separated type material layer；The first adhesive layer is provided between PET insulating layers and metal layer, the second adhesive layer is provided between the metal layer and suction wave layer, third adhesive layer, layer of polypropylene foil and the 4th adhesive layer are disposed between the suction wave layer and separated type material layer；The surface that 4th adhesive layer is contacted with separated type material layer has several salient points；The suction wave layer is composed of the following components：100 parts of wave-absorbing powder, 20 parts of butyl acrylate, 10 parts of acrylic acid, 25 parts of Isooctyl acrylate monomer, 18 parts of methyl methacrylate, 1 part of vinyl acetate, 0.2 part of 2 hydroxyl ethyl ester of methacrylic acid, 1.5 parts of Sodium Polyacrylate, 0.6 part of methyl ethyl ketone peroxide.Electro-magnetic wave absorption film of the present invention significantly improves the absorbing property of Protection glue band, and with stronger electromaganic wave absorbing property, reaches 85% in the attenuation rate of 2 ~ 10GHz electromagnetic waves.

Description

Electro-magnetic wave absorption film
Technical field
The invention belongs to technical field of electronic materials more particularly to a kind of electro-magnetic wave absorption films.
Background technology
At present, as shielding material, the piece of widely used metal or net are heavier, there is housing domestic demand of the configuration in equipment The problem of spending labour and time.Moreover, the piece or net of metal have there are electro-magnetic wave absorption ability it is big anisotropic Tendency, i.e., the tendency that electro-magnetic wave absorption ability is remarkably decreased when the incidence angle of electromagnetic wave increases.The electricity that electronic product releases Magnetic wave can bring electromagnetic interference to other electronic equipments of surrounding, make its operation irregularity；Also health can be caused to endanger simultaneously Evil.For at present, micromation, Highgrade integration are the main trends of electronic product development, and the inner space of these products is opposite It is narrow.In absorbing material, patch-type absorbing material thickness is thin, easy to use, for reducing electromagnetic radiation, preventing electromagnetic interference from having Good effect, compares and is suitably applied in electronic product.Therefore, thin thickness, light weight are designed and developed, suitable for small space Patch-type electromagnetic wave absorbent material, become those skilled in the art effort direction.
Invention content
The present invention provides a kind of electro-magnetic wave absorption film, this electro-magnetic wave absorption film improves the utilization of metal layer reflection electromagnetic field Rate, significantly improves the absorbing property of Protection glue band, and avoids the excessively concentration of heat, is conducive to heat diffusion, also avoids Since Wen Sheng causes film to upwarp, the stability of properties of product is improved.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of electro-magnetic wave absorption film including metal layer, is inhaled Wave layer and separated type material layer；The first adhesive layer is provided between PET insulating layers and metal layer, between the metal layer and suction wave layer The second adhesive layer is provided with, third adhesive layer, layer of polypropylene foil are disposed between the suction wave layer and separated type material layer With the 4th adhesive layer；The surface that 4th adhesive layer is contacted with separated type material layer has several salient points；
The suction wave layer is composed of the following components：100 parts of wave-absorbing powder, 20 parts of butyl acrylate, 10 parts of acrylic acid, acrylic acid are different 25 parts of monooctyl ester, 18 parts of methyl methacrylate, 1 part of vinyl acetate, 0.2 part of 2-hydroxyethyl methacry-late, Sodium Polyacrylate 1.5 parts, 0.6 part of methyl ethyl ketone peroxide；
The wave-absorbing powder is composed of the following components：
100 parts of carbonyl iron dust,
50 ~ 60 parts of nickel sesquioxide,
5 ~ 10 parts of nano graphite powder,
10 ~ 15 parts of cobalt chloride,
60 ~ 70 parts of unsaturated polyester (UP),
40 ~ 50 parts of neopelex.
Further improved technical solution is as follows in above-mentioned technical proposal：
1st, in said program, the thickness of first adhesive layer is less than the thickness of the second adhesive layer.
2nd, in said program, the thickness of second adhesive layer is less than third adhesive layer.
Since above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
1st, electro-magnetic wave absorption film of the present invention inhales wave layer using composite wave-absorbing powder carbonyl iron dust, nickel sesquioxide, nano-graphite Powder, cobalt chloride and butyl acrylate, acrylic acid, Isooctyl acrylate monomer, methyl methacrylate, vinyl acetate, methacrylic acid- 2- hydroxyl ethyl esters act synergistically, and have stronger electromaganic wave absorbing property, reach 85% in the attenuation rate of 2 ~ 10GHz electromagnetic waves, into one Step addition Sodium Polyacrylate, methyl ethyl ketone peroxide, not only improve polymer gluing, but also mixed powder disperses in the polymer Uniformly, so as to ensure that the reliability of electromagnetic performance；Secondly, unsaturated polyester (UP), detergent alkylate sulphur are further equipped in formula Sour sodium improves the entire heat conductivility for inhaling wave layer, is conducive to the heat expanding for generating electromagnetic wave, improves the stabilization of performance Property and product service life.
2nd, electro-magnetic wave absorption film of the present invention, which raises the utilization rate of metal layer reflection electromagnetic field, the setting of metal layer can It is repeatedly absorbed with being formed, significantly improves the absorbing property of pad pasting；Secondly, it inhales and is set gradually between wave layer and separated type material layer There are third adhesive layer, layer of polypropylene foil and the 4th adhesive layer, the effect of its proof voltage breakdown is greatly improved, also improves Inhale wave film strength；Again, the surface that the 4th adhesive layer is contacted with separated type material layer has several salient points, is conducive to be bonded When gas discharge, so as to avoid the generation of bubble.
Description of the drawings
Attached drawing 1 is electro-magnetic wave absorption membrane structure diagram of the present invention；
Attached drawing 2 is the partial structural diagram of attached drawing 1.
In the figures above：1st, salient point；2nd, metal layer；3rd, wave layer is inhaled；4th, separated type material layer；5th, layer of polypropylene foil；6th, Two adhesive layers；7th, third adhesive layer；8th, the 4th adhesive layer.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments：
Embodiment：A kind of electro-magnetic wave absorption film including metal layer 2, inhales wave layer 3 and separated type material layer 4；PET insulating layers 1 and metal The first adhesive layer is provided between layer 2, the second adhesive layer 6 is provided between the metal layer 2 and suction wave layer 3；The suction wave layer 3 Third adhesive layer 7,5 and the 4th adhesive layer 8 of layer of polypropylene foil are disposed between separated type material layer 4；4th glue The surface that adhesion coating 8 is contacted with separated type material layer 4 has several salient points 1.
The component and content for inhaling wave layer 3：The suction wave layer 3 is composed of the following components：100 parts of wave-absorbing powder, propylene 20 parts of acid butyl ester, 10 parts of acrylic acid, 25 parts of Isooctyl acrylate monomer, 18 parts of methyl methacrylate, 1 part of vinyl acetate, methyl-prop 0.2 part of olefin(e) acid -2- hydroxyl ethyl esters, 1.5 parts of Sodium Polyacrylate, 0.6 part of methyl ethyl ketone peroxide；
The wave-absorbing powder is grouped as by following content groups：100 parts of carbonyl iron dust, 55 parts of nickel sesquioxide, nano graphite powder 6 Part, 12 parts of cobalt chloride, 60 parts of unsaturated polyester (UP), 40 parts of neopelex.
The thickness of above-mentioned first adhesive layer is less than the thickness of the second adhesive layer 6, and the thickness of second adhesive layer 7 is less than the Three adhesive layers 7.
The thickness ratio of above-mentioned PET insulating layers 1 and layer of polypropylene foil 10 is 10：4~6.
Above-mentioned unsaturated polyester (UP) is synthesized by maleic anhydride, phthalic anhydride and propylene glycol.
Embodiment is as shown in table 3 in the maximum reflection coefficient and effective bandwidth of 2 ~ 18GHz frequency ranges：
Table 3
Inhale wave plate thickness Maximum reflection coefficient（dB） ≤ -8 dB effective bandwidths（GHz）
Embodiment 0.2mm -18 2~6
The thickness ratio of above-mentioned PET insulating layers 1 and layer of polypropylene foil 5 is 10： 6；The average height of above-mentioned salient point 1 is 8 microns.
Above-mentioned 1 thickness of PET insulating layers is 6 microns；The thickness ratio of the PET insulating layers 1 and layer of polypropylene foil 5 is 10： 5。
Above-described embodiment inhales the preparation process of wave layer 3, includes the following steps：
The first step：By carbonyl iron dust, nickel sesquioxide, nano graphite powder, cobalt chloride, unsaturated polyester (UP) part, detergent alkylate sulphur Sour sodium is uniformly mixed, and stirs to form mixed powder in 84 ~ 86 DEG C of conditions；
Second step：By butyl acrylate, acrylic acid, Isooctyl acrylate monomer, methyl methacrylate, vinyl acetate, metering system Acid -2- hydroxyl ethyl esters, Sodium Polyacrylate are mixed with the mixed powder of the first step, and are disperseed 1 ~ 2 hour through high speed agitator, so as to mixed Conjunction is formed uniformly mixture；
Third walks：It keeps the temperature after the mixture of second step is heated to 80 ~ 85 DEG C in a kettle, divides 1 ~ 3 time in insulating process It adds in methyl ethyl ketone peroxide and obtains and inhale wave mixed liquor, the soaking time is 4 ~ 10 hours；
4th step：The suction wave mixed liquor that third step obtains is coated on substrate；
5th step：Baking is carried out to the suction wave mixed liquor in the 4th step and forms suction wave layer.
During using above-mentioned electro-magnetic wave absorption film, which raises the utilization rate of metal layer reflection electromagnetic field, the settings of metal layer Multiple absorption can be formed, significantly improves the absorbing property of pad pasting；Secondly, it inhales and is set successively between wave layer and separated type material layer Third adhesive layer, layer of polypropylene foil and the 4th adhesive layer are equipped with, the effect of its proof voltage breakdown is greatly improved, also improves Suction wave film strength；Again, the surface that the 4th adhesive layer is contacted with separated type material layer has several salient points, is conducive to paste The discharge of gas during conjunction, so as to avoid the generation of bubble.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, should be covered by the protection scope of the present invention.

Claims (3)

1. a kind of electro-magnetic wave absorption film, it is characterised in that：Including metal layer（2）, inhale wave layer（3）With separated type material layer（4）；PET Insulating layer（1）With metal layer（2）Between be provided with the first adhesive layer, the metal layer（2）With inhaling wave layer（3）Between be provided with Two adhesive layers（6）, the suction wave layer（3）With separated type material layer（4）Between be disposed with third adhesive layer（7）, polypropylene it is thin Film layer（5）With the 4th adhesive layer（8）；
The suction wave layer（3）It is composed of the following components：100 parts of wave-absorbing powder, 20 parts of butyl acrylate, 10 parts of acrylic acid, propylene Different 25 parts of the monooctyl ester of acid, 18 parts of methyl methacrylate, 1 part of vinyl acetate, 0.2 part of 2-hydroxyethyl methacry-late, polyacrylic acid 1.5 parts of sodium, 0.6 part of methyl ethyl ketone peroxide；
The wave-absorbing powder is composed of the following components：
100 parts of carbonyl iron dust,
50 ~ 60 parts of nickel sesquioxide,
5 ~ 10 parts of nano graphite powder,
10 ~ 15 parts of cobalt chloride,
60 ~ 70 parts of unsaturated polyester (UP),
40 ~ 50 parts of neopelex.
2. electro-magnetic wave absorption film according to claim 1, it is characterised in that：The thickness of first adhesive layer is less than second Adhesive layer（6）Thickness.
3. electro-magnetic wave absorption film according to claim 1, it is characterised in that：Second adhesive layer（7）Thickness be less than Third adhesive layer（7）.
CN201711439503.9A 2015-05-21 2015-05-21 Electro-magnetic wave absorption film Pending CN108239491A (en)

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CN201711439394.0A Pending CN108251003A (en) 2015-05-21 2015-05-21 High reliability inhales wave film
CN201711439503.9A Pending CN108239491A (en) 2015-05-21 2015-05-21 Electro-magnetic wave absorption film
CN201510261015.8A Active CN105034483B (en) 2015-05-21 2015-05-21 Shielding pad pasting with heat sinking function
CN201711439416.3A Pending CN108248152A (en) 2015-05-21 2015-05-21 Electromagnetic shielding protection pad pasting
CN201711439531.0A Pending CN108251004A (en) 2015-05-21 2015-05-21 Composite electromagnetic absorbs pad pasting
CN201711439417.8A Pending CN108382033A (en) 2015-05-21 2015-05-21 Electromagnetic shielding film
CN201711439455.3A Pending CN108130004A (en) 2015-05-21 2015-05-21 Electromagnetic shielding inhales waveguide hotting mask
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CN201711439531.0A Pending CN108251004A (en) 2015-05-21 2015-05-21 Composite electromagnetic absorbs pad pasting
CN201711439417.8A Pending CN108382033A (en) 2015-05-21 2015-05-21 Electromagnetic shielding film
CN201711439455.3A Pending CN108130004A (en) 2015-05-21 2015-05-21 Electromagnetic shielding inhales waveguide hotting mask
CN201711439523.6A Pending CN108611013A (en) 2015-05-21 2015-05-21 Wave film is inhaled in heat dissipation

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CN108219699A (en) 2018-06-29
CN108382033A (en) 2018-08-10
CN108251003A (en) 2018-07-06
CN108611013A (en) 2018-10-02
CN108251004A (en) 2018-07-06
CN108248152A (en) 2018-07-06
CN105034483B (en) 2018-12-25
CN105034483A (en) 2015-11-11

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Application publication date: 20180703