CN111511181B - Patterned electromagnetic shielding material and preparation method and application thereof - Google Patents

Patterned electromagnetic shielding material and preparation method and application thereof Download PDF

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CN111511181B
CN111511181B CN202010420451.6A CN202010420451A CN111511181B CN 111511181 B CN111511181 B CN 111511181B CN 202010420451 A CN202010420451 A CN 202010420451A CN 111511181 B CN111511181 B CN 111511181B
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electromagnetic shielding
patterned electromagnetic
patterned
shielding material
conductive filler
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CN111511181A (en
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胡友根
刘学斌
雷作敏
朱朋莉
赵涛
孙蓉
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Shenzhen Institute of Advanced Technology of CAS
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes

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  • Chemical Kinetics & Catalysis (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • General Chemical & Material Sciences (AREA)
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Abstract

The invention provides a patterned electromagnetic shielding material and a preparation method and application thereof, wherein the patterned electromagnetic shielding material comprises a patterned electromagnetic shielding layer, and the patterned electromagnetic shielding layer comprises conductive filler and a resin base material; wherein the porosity of the patterned electromagnetic shielding layer is 10-90%. The patterned electromagnetic shielding material provided by the invention has excellent conductive performance, stretchability, good light transmittance and high electromagnetic shielding efficiency.

Description

Patterned electromagnetic shielding material and preparation method and application thereof
Technical Field
The invention belongs to the technical field of electromagnetic shielding materials, relates to a patterned electromagnetic shielding material, a preparation method and application thereof, and particularly relates to a stretchable patterned electromagnetic shielding material, a preparation method and application thereof.
Background
With the wide application of electronic and wireless communication devices in life and production, electromagnetic radiation and electromagnetic interference become important factors influencing the normal operation of electronic devices, and are new pollution sources harming human health. In order to reduce or avoid the electromagnetic interference phenomenon, it is becoming more and more important to protect electronic devices and human health using the principle of electromagnetic shielding. At present, advanced precise electronic equipment is widely applied in the fields of national defense and military, medical health, industrial production and the like, and observation windows of electronic equipment such as radar display, navigation systems, precise instruments, touch screens and the like all need to use transparent electromagnetic shielding materials. The transparent electromagnetic shielding material is required to meet both high light transmittance and high electromagnetic shielding effectiveness in practical application, which brings great difficulty to the research and application of the transparent electromagnetic shielding material system.
At present, the transparent electromagnetic shielding material generally adopts a metal mesh structure as a shielding layer, and comprises metal materials such as nickel, copper, stainless steel and the like, and the transparent electromagnetic shielding material of the metal mesh structure is generally rigid and can only be bent and deformed but cannot realize tensile deformation, and is easily corroded and fails under the influence of the external environment. The development and application of flexible electronic devices require that the electromagnetic shielding material has certain stretchability; the metal mesh grid transparent electromagnetic shielding material cannot be directly applied because the metal mesh grid transparent electromagnetic shielding material cannot meet the large deformation requirement of a flexible electronic device and a flexible integrated circuit.
CN102291971A discloses a flexible daylighting electromagnetic shield window, includes a flexible metal mesh, superposes a flexible metal shielding cloth frame around the metal mesh, and the flexible transparent film of two sides complex of metal mesh, the electromagnetic shield window that this patent application provided can solve electromagnetic shield material's light transmissivity problem to a certain extent, but its electromagnetic shield field that can not be applied to some to the material requirement is tighter, and the range of application is narrower to the cost is higher. CN102848610A discloses an electromagnetic shielding material, which comprises a substrate layer and a wire mesh which is melt-fixed in the substrate layer, wherein the substrate layer is made of flexible material with electromagnetic shielding function, the wire mesh is woven by a plurality of wires into a grid shape, and the substrate layer is made of one or more of polyethylene, polyester, nylon and polyvinyl chloride. Although the electromagnetic shielding material provided by the patent application has better light transmission, the light transmission is ensured on the premise of losing the electromagnetic shielding performance, and the practical application is not facilitated.
Therefore, it is desirable to provide an electromagnetic shielding material that can simultaneously achieve the light transmittance, the electromagnetic shielding performance, and the stretching performance.
Disclosure of Invention
The invention aims to provide a patterned electromagnetic shielding material, and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a patterned electromagnetic shielding material comprising a patterned electromagnetic shielding layer, the composition of which comprises a conductive filler and a resin base material.
Wherein the patterned electromagnetic shielding layer has a porosity of 10-90%, such as 15%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc.
According to the invention, the patterned electromagnetic shielding layer with the porosity of 10-90% is specifically selected, and within the range, the patterned electromagnetic shielding layer has high electromagnetic shielding efficiency and good light transmission; if the porosity is too large, the electromagnetic shielding effectiveness is small; if the porosity is small, the optical transparency of the electromagnetic shielding layer is poor.
In the present invention, the patterned electromagnetic shielding layer has through holes, and the porosity means a percentage of a volume of the through holes to a total volume of the patterned electromagnetic shielding layer.
Preferably, the patterned electromagnetic shield layer has polygonal through holes and/or circular through holes. The present invention means that the through-hole has a polygonal structure and/or a circular structure.
Preferably, the patterned electromagnetic shielding layer has at least two polygonal through holes and/or circular through holes arranged in an array.
The polygon of the present invention includes regular polygons and irregular polygons, and exemplarily, regular polygons include triangles, rectangles, squares, pentagons, hexagons, and the like; the irregular polygon refers to an irregular shape with at least one side being an arc line, a wavy line, a curved line, etc., such as a sector, etc., and is collectively referred to as a polygon in the present invention.
In the present invention, the polygonal and/or circular through-holes have a maximum dimension of 50-2000. mu.m, such as 100. mu.m, 200. mu.m, 500. mu.m, 800. mu.m, 1000. mu.m, 1200. mu.m, 1500. mu.m, 1800. mu.m, 1900. mu.m, etc.
In the present invention, the maximum size refers to that the maximum length of the connecting line of any two points in the polygonal through hole and/or the circular through hole is the maximum size, for example, the maximum size of the circle is the diameter, the maximum size of the square is the diagonal length, and the like.
Preferably, the distance between the centers of any two adjacent circular through holes is 50-500 μm, such as 80 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, and the like.
Preferably, the distance between the centers of any two adjacent polygonal through holes is 50-2000 μm, such as 100 μm, 200 μm, 500 μm, 800 μm, 1000 μm, 1200 μm, 1500 μm, 1800 μm, 1900 μm, etc.
Preferably, the line width of the polygonal and/or circular via is 10-500 μm, such as 20 μm, 50 μm, 80 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, and the like.
In the present invention, the line width of the polygonal through-hole and/or the circular through-hole refers to: a width forming a side length of the polygonal through-hole and/or the circular through-hole, the side length may be the same width, for example, the shape of the through-hole is square; different widths are also possible, for example if the shape of the through-hole is an irregular polygon or a circular hole. The invention can ensure that the line width of all the side lengths is within the limit range of the invention.
In the present invention, the conductive filler is selected from a metal filler and/or a carbon material-based filler.
Preferably, the metal filler is selected from any one of silver powder, copper powder, nickel powder, iron powder, aluminum powder, zinc powder or tin powder or a combination of at least two of the silver powder, the copper powder, the nickel powder, the iron powder, the aluminum powder, the zinc powder or the tin powder.
Preferably, the carbon material filler is selected from any one of graphite, graphene, carbon fiber, carbon black or carbon nanotube or a combination of at least two of the same.
Preferably, the resin substrate is selected from any one of or a combination of at least two of polyurethane, silicone rubber, polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, polyimide, or poly 3, 4-ethylenedioxythiophene/polystyrene sulfonate, and further preferably any one of or a combination of at least two of polyurethane, silicone rubber, polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, or polyimide.
The invention takes metal filler or carbon series filler as conductive component, takes flexible high molecular material as substrate to prepare polymer conductive composite material, and prepares the electromagnetic shielding layer with patterned structure through printing, deposition and other technologies, thereby improving the stretchability of the electromagnetic shielding layer, improving the corrosion resistance of the material, maintaining higher conductivity and electromagnetic shielding performance, simultaneously providing certain light transmission by the patterned structure, and meeting the requirements of the electromagnetic shielding material on light transmission and electromagnetic shielding of flexible electronic devices.
Preferably, the conductive filler is present in an amount of 20-90%, such as 30%, 40%, 50%, 60%, 70%, 80%, etc., based on the total mass of the patterned electromagnetic shielding material.
Preferably, the conductive filler is a metal filler, and the content of the conductive filler is 85% by mass of the total mass of the patterned electromagnetic shielding material.
Preferably, the conductive filler is a carbon black-based filler, and the content of the conductive filler is 30% by mass of the total mass of the patterned electromagnetic shielding material.
Preferably, the conductive filler is carbon fiber and/or carbon nanotube, and the content of the conductive filler is 40% by mass of the total mass of the patterned electromagnetic shielding material.
Preferably, a flexible substrate layer is further included disposed on one side of the patterned electromagnetic shield layer.
Preferably, the composition of the flexible substrate layer comprises any one of polydimethylsiloxane, polyurethane, silicone rubber, polyethylene terephthalate, polyethylene, polypropylene, polycarbonate or polyimide or a combination of at least two of the same.
Preferably, the thickness of the patterned electromagnetic shield layer is 5-100 μm, such as 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, and the like.
Preferably, the flexible substrate layer has a thickness of 10-200 μm, such as 20 μm, 40 μm, 60 μm, 80 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, and the like.
The electromagnetic shielding layer provided by the invention can be bonded with the substrate in the modes of chemical crosslinking, hot melting, solvent dissolution and the like, so that the electromagnetic shielding material has good electromagnetic shielding performance, good mechanical property and stretchability.
In a second aspect, the present invention provides a method for preparing the patterned electromagnetic shielding material according to the first aspect, the method comprising the steps of:
and arranging the electromagnetic shielding slurry on a flexible substrate, and then removing the flexible substrate to obtain the patterned electromagnetic shielding layer.
Wherein the patterned electromagnetic shield layer has a porosity of 10-90%, such as 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, etc.
Preferably, the manner of setting includes screen printing, fused direct writing, inkjet printing or fused deposition.
In a third aspect, the present invention provides the use of a patterned electromagnetic shielding material according to the first aspect in a radar display, a navigation system, a precision instrument or a touch screen.
Compared with the prior art, the invention has the following beneficial effects:
(1) the patterned electromagnetic shielding material provided by the invention has excellent conductive performance, stretchability, good light transmittance and high electromagnetic shielding efficiency.
(2) According to the invention, by regulating and controlling the patterned structure (including square, hexagonal, circular, wavy and the like) and the conductivity, line width, thickness and the like of the conductive polymer composite material, the light transmittance and electromagnetic shielding effectiveness of the final patterned electromagnetic shielding material can be regulated, the light transmittance is 15% -60%, the electromagnetic shielding effectiveness is 15-45dB, and the application requirements of an electromagnetic shielding window and a flexible electromagnetic shielding material can be met.
Drawings
Fig. 1 is a schematic structural view of a patterned electromagnetic shield layer provided in example 1.
Fig. 2 is a schematic structural view of the patterned electromagnetic shield layer provided in example 2.
Fig. 3 is a schematic structural view of the patterned electromagnetic shield layer provided in example 3.
Fig. 4 is a schematic structural view of the patterned electromagnetic shield layer provided in example 4.
FIG. 5 is a schematic structural view of a patterned electromagnetic shield layer provided in example 13.
Fig. 6 is a schematic view of the structure of the patterned electromagnetic shield layer provided in comparative example 1.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A patterned electromagnetic shielding material is composed of a patterned electromagnetic shielding layer and a flexible substrate layer;
fig. 1 is a schematic structural view of the patterned electromagnetic shielding layer, and as shown in fig. 1, the patterned electromagnetic shielding layer has through holes which are periodically arranged and are formed by four curves to form a polygon, and the maximum size of the polygon is 480 μm.
The pattern of the patterned electromagnetic shield layer was composed of a circle having a diameter of 200 μm and a curved line having a line width of 50 μm.
The preparation method comprises the following steps:
(1) preparing a flexible substrate layer
Putting quartz glass on a rotary coating machine, pouring 25 wt% of thermoplastic polyurethane (Basf Elastollan 1185A)/N, N-dimethylformamide solution (TPU/DMF) on the quartz glass, rotating the quartz glass at the rotating speed of 800rpm for 10s, and putting the coated quartz glass in a blast oven at 75 ℃ for 30min to obtain the thermoplastic polyurethane substrate layer.
(2) Preparation of electromagnetic shielding material
Mixing 25 wt% of TPU/DMF solution provided in the step (1) with the flake silver powder (middle oriental color) to obtain electromagnetic shielding slurry, wherein the mass ratio of the TPU to the flake silver powder is 15: 85;
and (3) placing the thermoplastic polyurethane substrate layer on a screen printing table, carrying out screen printing on the patterned electromagnetic shielding material on the screen printing table, and placing the screen printing table in a 75-DEG C oven for 2h after printing is finished to obtain the patterned electromagnetic shielding material.
Example 2
The difference from example 1 is that in the screen printing process, different patterns of screen plates were replaced to obtain different patterns of patterned electromagnetic shielding materials.
Fig. 2 is a schematic structural view of the patterned electromagnetic shielding layer provided in this embodiment, and as shown in fig. 2, the patterned electromagnetic shielding layer has square through holes with a maximum size of 700 μm and a line width of 500 μm.
Example 3
The difference from example 1 is that in the screen printing process, different patterns of screen plates were replaced to obtain different patterns of patterned electromagnetic shielding materials.
Fig. 3 is a schematic structural view of the patterned electromagnetic shielding layer provided in this embodiment, and as shown in fig. 3, the patterned electromagnetic shielding layer has a circular through hole with a maximum size of 1000 μm and a line width of 500 μm.
Example 4
The difference from example 1 is that in the screen printing process, different patterns of screen plates were replaced to obtain different patterns of patterned electromagnetic shielding materials.
Fig. 4 is a schematic structural diagram of the patterned electromagnetic shielding layer provided in this embodiment, and as shown in fig. 4, the patterned electromagnetic shielding layer has hexagonal through holes with a maximum size of 1000 μm and a line width of 500 μm.
Examples 5 to 8
A patterned electromagnetic shielding material is composed of a patterned electromagnetic shielding layer and a flexible substrate layer;
the patterns were as in examples 1 to 4.
The preparation method comprises the following steps:
(1) preparing a flexible substrate layer
Putting quartz glass on a rotary film coating machine, then pouring polydimethylsiloxane precursor liquid (PDMS, Sylgard 184) on the quartz glass, rotating the quartz glass at the rotating speed of 600rpm for 15s for coating, and putting the coated quartz glass in a 60 ℃ oven for 30min to obtain a semi-cured PDMS film;
(2) preparation of electromagnetic shielding material
Same as in example 1.
Examples 9 to 12
A patterned electromagnetic shielding material is composed of a patterned electromagnetic shielding layer and a flexible substrate layer;
the patterns were as in examples 1 to 4.
The preparation method comprises the following steps:
(1) preparing a flexible substrate layer
Polyethylene (LDPE, C7100, Asia Polymer Corporation) melt was cast into a film by extrusion to give a flexible base film of polyethylene having a thickness of 60 μm;
(2) preparation of electromagnetic shielding material
Slurry reference example 1
And (3) placing the polyethylene flexible substrate in a fused deposition printer, carrying out fused deposition on the patterned electromagnetic shielding material, and cooling to room temperature to obtain the patterned electromagnetic shielding material.
Example 13
A patterned electromagnetic shielding material is composed of a patterned electromagnetic shielding layer and a flexible substrate layer;
fig. 5 is a schematic structural view of the patterned electromagnetic shielding layer, and as shown in fig. 5, the patterned electromagnetic shielding layer has square through holes periodically arranged, the maximum size is 1.0mm, and the line width is 50 μm.
The preparation method comprises the following steps:
(1) preparing a flexible substrate layer
See example 1, the same as example 1;
(2) preparation of electromagnetic shielding material
Preparing nickel powder, poly (3, 4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT: PSS) and a wetting agent into ink according to the mass ratio of 6:10: 3;
and printing the patterned electromagnetic shielding layer by utilizing ink-jet printing to obtain the patterned electromagnetic shielding material.
Example 14
A patterned electromagnetic shielding material is composed of a patterned electromagnetic shielding layer and a flexible substrate layer;
the pattern is referred to in example 13.
The preparation method comprises the following steps:
(1) preparing a flexible substrate layer
Flexible substrate layer reference example 1
(2) Preparation of electromagnetic shielding material
Preparing carbon nano tubes and water-based polyurethane (Chengdu Organic Chemicals Co. LTD) into ink according to the mass ratio of 1: 4;
and printing the patterned electromagnetic shielding layer by utilizing ink-jet printing to obtain the patterned electromagnetic shielding material.
Comparative example 1
The difference from example 2 is that in the screen printing process, different patterns of screen plates were replaced to obtain different patterns of patterned electromagnetic shielding materials.
Fig. 6 is a schematic structural view of the patterned electromagnetic shielding layer provided in this embodiment, and as shown in fig. 6, the patterned electromagnetic shielding layer has square through holes with a maximum size of 2.4mm and a line width of 1000 μm.
Performance testing
The electromagnetic shielding materials provided in examples 1 to 14 and comparative example 1 were subjected to performance tests as follows:
(1) light transmittance: measuring a transmittance in a wavelength range of 400-800nm using an ultraviolet-visible spectrophotometer (Shimadzu Corporation, UV-3600), with a transmittance at 550nm as a transmittance of the electromagnetic shielding material;
(2) electromagnetic shielding effectiveness: measuring the electromagnetic shielding effectiveness in the frequency band of 8.2-12.5GHz by adopting a vector network analyzer (VNA, Keysight, E5071C);
the test results are shown in table 1:
TABLE 1
Figure BDA0002496671280000101
Figure BDA0002496671280000111
The embodiment and the performance test show that the patterned electromagnetic shielding material provided by the invention has better light transmittance and better electromagnetic shielding efficiency, and can meet the application requirements, wherein the light transmittance is 15-60%, the electromagnetic shielding efficiency is 15-45dB, and the application requirements of an electromagnetic shielding window and a flexible electromagnetic shielding material can be met.
As can be seen from the comparison between the examples and the comparative examples, the patterned electromagnetic shielding material provided by the invention has both light transmittance and electromagnetic shielding effectiveness, and the performances of the two aspects are balanced.
The applicant states that the present invention is illustrated by the above embodiments of the patterned electromagnetic shielding material and the preparation method and application thereof, but the present invention is not limited to the above process steps, i.e. it does not mean that the present invention must rely on the above process steps to be carried out. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.

Claims (9)

1. The patterned electromagnetic shielding material is characterized by comprising a patterned electromagnetic shielding layer, wherein the patterned electromagnetic shielding layer comprises conductive filler and a resin base material;
wherein the porosity of the patterned electromagnetic shielding layer is 10-29%;
the patterned electromagnetic shielding material is prepared by a method comprising the following steps:
arranging electromagnetic shielding slurry on a flexible substrate, and then removing the flexible substrate to obtain the patterned electromagnetic shielding layer;
the electromagnetic shielding slurry is mainly prepared by mixing conductive filler and resin base material;
the patterned electromagnetic shielding layer is provided with at least two polygonal through holes and/or circular through holes which are arranged in an array;
the maximum size of the polygonal through hole and/or the circular through hole is 50-2000 mu m;
the distance between the centers of any two adjacent circular through holes is selected from 50-500 mu m;
the distance between the centers of any two adjacent polygonal through holes is selected from 50-2000 mu m;
the line width of the polygonal through hole and/or the circular through hole is 10-500 mu m;
the conductive filler is selected from metal fillers and/or carbon material fillers;
the metal filler is selected from any one or the combination of at least two of silver powder, copper powder, nickel powder, iron powder, aluminum powder, zinc powder or tin powder;
the carbon material filler is selected from any one or combination of at least two of graphite, graphene, carbon fiber, carbon black or carbon nanotubes;
the content of the conductive filler is 20-90% of the total mass of the patterned electromagnetic shielding material;
the conductive filler is a metal filler, and the content of the conductive filler is 85% by mass of the total mass of the patterned electromagnetic shielding material;
the conductive filler is carbon black filler, and the content of the conductive filler is 30% by mass of the total mass of the patterned electromagnetic shielding material;
the conductive filler is carbon fiber and/or carbon nano tube, and the content of the conductive filler is 40% by mass of the total mass of the patterned electromagnetic shielding material.
2. The patterned electromagnetic shield according to claim 1, wherein the resin substrate is selected from any one of or a combination of at least two of polyurethane, silicone rubber, polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, polyimide, or poly 3, 4-ethylenedioxythiophene/polystyrene sulfonate.
3. The patterned electromagnetic shield material according to claim 2, wherein the resin substrate is selected from any one of polyurethane, silicone rubber, polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, or polyimide, or a combination of at least two thereof.
4. The patterned electromagnetic shield material of claim 1, further comprising a flexible substrate layer disposed on one side of said patterned electromagnetic shield layer.
5. The patterned electromagnetic shield material of claim 4, wherein the composition of said flexible substrate layer comprises any one or a combination of at least two of polyurethane, silicone rubber, polyethylene terephthalate, polyethylene, polypropylene, polycarbonate, or polyimide.
6. The patterned electromagnetic shield material of claim 1, wherein said patterned electromagnetic shield layer has a thickness of 5-100 μm.
7. Patterned electromagnetic shielding material according to claim 4, characterized in that the thickness of the flexible base layer is 10-200 μm.
8. The patterned electromagnetic shielding material of claim 1, wherein said disposing comprises screen printing, direct melt writing, ink jet printing, or melt deposition.
9. Use of the patterned electromagnetic shielding material according to any one of claims 1-8 in radar displays, navigation systems, precision instruments or touch screens.
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CN1957650A (en) * 2004-05-24 2007-05-02 郡是株式会社 Electromagnetic wave shielding material and process for producing the same
CN108882661A (en) * 2018-06-25 2018-11-23 中国科学院深圳先进技术研究院 A kind of stretchable electromagnetic wave shield film of transparent flexible and preparation method thereof

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KR101417270B1 (en) * 2012-05-08 2014-07-08 현대자동차주식회사 Hybrid filler for shielding electromagnetic wave and manufacturing method of the same
TWI608789B (en) * 2015-03-27 2017-12-11 台虹科技股份有限公司 Electromagnetic shielding film and circuit board with electromagnetic shielding function
US10945358B2 (en) * 2016-12-12 2021-03-09 Amogreentech Co., Ltd. Flexible electromagnetic wave shielding material, electromagnetic wave shielding type circuit module comprising same and electronic device furnished with same

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Publication number Priority date Publication date Assignee Title
CN1957650A (en) * 2004-05-24 2007-05-02 郡是株式会社 Electromagnetic wave shielding material and process for producing the same
CN108882661A (en) * 2018-06-25 2018-11-23 中国科学院深圳先进技术研究院 A kind of stretchable electromagnetic wave shield film of transparent flexible and preparation method thereof

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