CN108382033A - Electromagnetic shielding film - Google Patents

Electromagnetic shielding film Download PDF

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Publication number
CN108382033A
CN108382033A CN201711439417.8A CN201711439417A CN108382033A CN 108382033 A CN108382033 A CN 108382033A CN 201711439417 A CN201711439417 A CN 201711439417A CN 108382033 A CN108382033 A CN 108382033A
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China
Prior art keywords
layer
parts
adhesive layer
wave
shielding film
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CN201711439417.8A
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Chinese (zh)
Inventor
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 CN201711439417.8A priority Critical patent/CN108382033A/en
Publication of CN108382033A publication Critical patent/CN108382033A/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
    • B32B15/08—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 of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/08—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 of synthetic resin
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Abstract

The present invention discloses a kind of electromagnetic shielding film, including metal layer, suction wave layer and separated type material layer；It is provided with the first adhesive layer 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 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.Electromagnetic shielding film of the present invention significantly improves the absorbing property of Protection glue band, and is conducive to the discharge of gas when fitting, so as to avoid the generation of bubble.

Description

Electromagnetic shielding film
Technical field
The invention belongs to technical field of electronic materials more particularly to a kind of electromagnetic shielding films.
Background technology
Currently, the piece of widely used metal or net are heavier as shielding material, there is shell domestic demand of the configuration in equipment The problem of spending labour and time.Moreover, there are electro-magnetic wave absorption abilities to have greatly anisotropic for the piece or net of metal 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, it designs and develops thin thickness, light weight, be 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 electromagnetic shielding film, this electromagnetic shielding 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 electromagnetic shielding film, including metal layer, suction 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 It is provided with the second adhesive layer, 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, 30 parts of butyl acrylate, 18 parts of acrylic acid, acrylic acid are different 32 parts of monooctyl ester, 12 parts of methyl methacrylate, 1.8 parts of vinyl acetate, 0.8 part of 2-hydroxyethyl methacry-late, Sodium Polyacrylate 1.2 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, nano graphite powder 5 ~ 10 Part, 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：
1, in said program, the thickness of second adhesive layer is less than third adhesive layer.
2, in said program, the thickness of first adhesive layer is less than the thickness of the second adhesive layer.
Since above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
1, electromagnetic shielding 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, 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.
2, electromagnetic shielding 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.
Specific implementation mode
With reference to embodiment, the invention will be further described：
Embodiment：A kind of electromagnetic shielding film, including metal layer, suction wave layer and separated type material layer；PET insulating layers and metal layer it Between be provided with the first adhesive layer, be provided with the second adhesive layer between the metal layer and suction wave layer；The suction wave layer and release material Third adhesive layer, layer of polypropylene foil and the 4th adhesive layer are disposed between the bed of material；4th adhesive layer and release material The surface of bed of material contact has several salient points；
The suction wave layer is composed of the following components：100 parts of wave-absorbing powder, 30 parts of butyl acrylate, 18 parts of acrylic acid, acrylic acid are different 32 parts of monooctyl ester, 12 parts of methyl methacrylate, 1.8 parts of vinyl acetate, 0.8 part of 2-hydroxyethyl methacry-late, Sodium Polyacrylate 1.2 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, 54 parts of nickel sesquioxide, 8 parts of nano graphite powder, chlorine Change 13 parts of cobalt, 65 parts of unsaturated polyester (UP), 48 parts of neopelex.
The thickness of above-mentioned first adhesive layer is less than the thickness of the second adhesive layer, and the thickness of second adhesive layer is less than third Adhesive layer.
Above-mentioned PET insulating layers and the thickness ratio of layer of polypropylene foil are 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 0.6mm -28 2~9
Above-mentioned PET insulating layers and the thickness ratio of layer of polypropylene foil are 10： 6；The average height of above-mentioned salient point is 8 microns.
Above-mentioned PET thickness of insulating layer is 6 microns；The PET insulating layers and the thickness ratio of layer of polypropylene foil are 10：5.
Above-described embodiment inhales the preparation process of wave layer, 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, 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 Methyl ethyl ketone peroxide is added and obtains and inhales 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.
When using above-mentioned electromagnetic shielding film, which raises the utilization rate of metal layer reflection electromagnetic field, the settings of metal layer Multiple absorption can be formed, the absorbing property of pad pasting is significantly improved；Secondly, it inhales and is set successively between wave layer and separated type material layer It is equipped with third adhesive layer, layer of polypropylene foil and the 4th adhesive layer, 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 when 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 cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.

Claims (3)

1. a kind of electromagnetic shielding film, it is characterised in that：Including metal layer, inhale wave layer and separated type material layer；PET insulating layers and gold Belong to and be provided with the first adhesive layer between layer, be provided with the second adhesive layer between the metal layer and suction wave layer, the suctions wave layer and Third adhesive layer, layer of polypropylene foil and the 4th adhesive layer are disposed between separated type material layer；
The suction wave layer is composed of the following components：100 parts of wave-absorbing powder, 30 parts of butyl acrylate, 18 parts of acrylic acid, acrylic acid are different 32 parts of monooctyl ester, 12 parts of methyl methacrylate, 1.8 parts of vinyl acetate, 0.8 part of 2-hydroxyethyl methacry-late, Sodium Polyacrylate 1.2 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, nano graphite powder 5 ~ 10 Part, 10 ~ 15 parts of cobalt chloride, 60 ~ 70 parts of unsaturated polyester (UP), 40 ~ 50 parts of neopelex.
2. electromagnetic shielding film according to claim 1, it is characterised in that：The thickness of second adhesive layer is less than third Adhesive layer.
3. electromagnetic shielding film according to claim 1, it is characterised in that：The thickness of first adhesive layer is less than second The thickness of adhesive layer.
CN201711439417.8A 2015-05-21 2015-05-21 Electromagnetic shielding film Pending CN108382033A (en)

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CN201711439417.8A CN108382033A (en) 2015-05-21 2015-05-21 Electromagnetic shielding film

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CN201711439421.4A Pending CN108219699A (en) 2015-05-21 2015-05-21 Wave screened film is inhaled in height heat dissipation
CN201711439531.0A Pending CN108251004A (en) 2015-05-21 2015-05-21 Composite electromagnetic absorbs pad pasting
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
CN201711439503.9A Pending CN108239491A (en) 2015-05-21 2015-05-21 Electro-magnetic wave absorption film
CN201711439394.0A Pending CN108251003A (en) 2015-05-21 2015-05-21 High reliability inhales wave film
CN201711439416.3A Pending CN108248152A (en) 2015-05-21 2015-05-21 Electromagnetic shielding protection pad pasting
CN201711439417.8A Pending CN108382033A (en) 2015-05-21 2015-05-21 Electromagnetic shielding film

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CN201711439421.4A Pending CN108219699A (en) 2015-05-21 2015-05-21 Wave screened film is inhaled in height heat dissipation
CN201711439531.0A Pending CN108251004A (en) 2015-05-21 2015-05-21 Composite electromagnetic absorbs pad pasting
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
CN201711439503.9A Pending CN108239491A (en) 2015-05-21 2015-05-21 Electro-magnetic wave absorption film
CN201711439394.0A Pending CN108251003A (en) 2015-05-21 2015-05-21 High reliability inhales wave film
CN201711439416.3A Pending CN108248152A (en) 2015-05-21 2015-05-21 Electromagnetic shielding protection pad pasting

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CN108239491A (en) 2018-07-03
CN108611013A (en) 2018-10-02
CN108251003A (en) 2018-07-06
CN108248152A (en) 2018-07-06
CN108251004A (en) 2018-07-06
CN108130004A (en) 2018-06-08
CN105034483A (en) 2015-11-11
CN108219699A (en) 2018-06-29

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Application publication date: 20180810