CN115593043A - Manufacturing method of electromagnetic shielding film and electromagnetic shielding film - Google Patents
Manufacturing method of electromagnetic shielding film and electromagnetic shielding film Download PDFInfo
- Publication number
- CN115593043A CN115593043A CN202210486715.7A CN202210486715A CN115593043A CN 115593043 A CN115593043 A CN 115593043A CN 202210486715 A CN202210486715 A CN 202210486715A CN 115593043 A CN115593043 A CN 115593043A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic shielding
- shielding film
- polyetherimide
- fiber
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/59—Polyamides; Polyimides
-
- 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
- H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Textile Engineering (AREA)
- Fluid Mechanics (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a manufacturing method of an electromagnetic shielding film and the electromagnetic shielding film, wherein the method comprises the following steps: providing a prefabricated carbon nanotube dispersion; adding special engineering plastics into the carbon nano tube dispersion liquid, and adding a viscosity regulator and a surface wetting agent to obtain a polyetherimide solution with a preset viscosity; soaking a metal fiber in the polyetherimide solution to obtain a metal core conductive fiber coated with carbon nanotube modified polyetherimide; weaving the metal core conductive fibers to obtain fiber woven cloth; and pressing a polyether-ether-ketone film on the surface of the fiber woven cloth to obtain the electromagnetic shielding film. The electromagnetic shielding film obtained by the invention has the electromagnetic shielding energy efficiency of more than or equal to 30dB, improves the shielding energy efficiency, and has the characteristics of high strength, corrosion resistance, wear resistance, good flexibility and weldability.
Description
Technical Field
The invention relates to the technical field of electromagnetic shielding, in particular to a manufacturing method of an electromagnetic shielding film and the electromagnetic shielding film.
Background
At present, a large amount of electromagnetic waves can be radiated by electric appliances and electronic equipment in the using process, and the electromagnetic waves cause non-negligible harm to the normal safe operation of the electronic equipment and the living environment of human beings. With the rapid increase in the number of various wireless communication systems and high-frequency electronic devices, electromagnetic interference phenomena and electromagnetic pollution problems are becoming more prominent. In the related technology, most of the existing blended cloth is a common wearable product, and the electromagnetic shielding effect can be realized through polymer fiber electroplating, but the blended cloth has limited shielding efficiency, poor product performance stability and low shielding efficiency in unit thickness; particularly, in high temperature, high humidity and acid-base environment, the metal electromagnetic shielding material has the problem of poor corrosion resistance and the like, and the common plastic electromagnetic shielding modified material has the defects of poor temperature difference resistance, poor chemical resistance and the like.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art. To this end, an object of the present invention is to provide a method for manufacturing an electro-magnetic shielding film, including:
providing a prefabricated carbon nanotube dispersion;
adding special engineering plastics into the carbon nano tube dispersion liquid, and adding a viscosity regulator and a surface wetting agent to obtain a polyetherimide solution with a preset viscosity;
soaking a metal fiber in the polyetherimide solution to obtain a metal core conductive fiber coated with carbon nanotube modified polyetherimide;
weaving the metal core conductive fibers to obtain fiber woven cloth;
and pressing a polyether-ether-ketone film on the surface of the fiber woven cloth to obtain the electromagnetic shielding film.
Optionally, the method for preparing the carbon nanotube dispersion comprises:
providing a mixed solvent;
adding a dispersing auxiliary agent and the carbon nano or sulfonated nano tube into the mixed solvent, and dispersing under a preset temperature condition and an ultrasonic condition to obtain a carbon nano tube dispersion liquid with the content of 0.1-3 wt%; the dispersing auxiliary agent accounts for 3-30% of the mass of the carbon nano tube.
Optionally, the mixed solvent at least comprises one or more of N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, dimethyl sulfoxide, tetramethylene sulfone (sulfolane), diphenyl sulfone and chloroform.
Optionally, adding a special engineering plastic to the carbon nanotube dispersion, and adding a viscosity modifier and a surface wetting agent to obtain a polyetherimide solution with a predetermined viscosity, including:
adding special engineering plastics into the carbon nano tube dispersion liquid to prepare and obtain the polyetherimide solution; the special engineering plastic comprises PEI or one or more of PAI, PES, PPSU, PSU and PEK-C polymer mixture with the content of 10-40% of the mass of PEI
Adding 0.1 to 1wt% of the viscosity modifier and 0.1 to 1% of the surface wetting agent to the polyetherimide solution to adjust the polyetherimide solution to a predetermined viscosity; the predetermined viscosity is 350 to 5000mPa.s.
Optionally, the dipping the metal fiber into the polyetherimide solution to obtain the metal core conductive fiber coated with the carbon nanotube modified polyetherimide, includes:
degreasing metal fibers with the diameter of 6-100um, and soaking the metal fibers in the polyetherimide solution after degreasing;
and after soaking, baking the metal fiber at the temperature of 100-350 ℃ for 1-10 minutes to remove the mixed solvent, the viscosity regulator and the surface wetting agent to obtain the metal core conductive fiber coated with the carbon nano tube modified polyetherimide.
Optionally, pressing a polyetheretherketone film on the surface of the fiber woven cloth to obtain the electromagnetic shielding film, including:
preheating the fiber woven cloth and the polyether-ether-ketone film at 230-280 ℃, and then carrying out corona discharge treatment on the polyether-ether-ketone film;
and coating the polyether-ether-ketone film subjected to corona discharge on the surface of the fiber woven cloth, and performing compression molding by adopting a compression roller or a compression plate at the temperature of 280-330 ℃ and the pressure of 0.5-3Mpa to obtain the electromagnetic shielding film.
Optionally, the polyetheretherketone film has at least one surface that is a frosted surface, and the roughness of the frosted surface is ra0.4-Ra25.
Optionally, the thickness of the polyetheretherketone film is 5-500um, the corona discharge output voltage is 2-100kV, and the discharge frequency is 2-100kHz.
Another object of the present invention is to provide an electromagnetic shielding film, including:
the braided layer is formed by braiding a plurality of bundles of metal core conductive fibers;
the thin film layer is coated on the surface of the woven layer and is integrated with the woven layer.
Optionally, the thin film layer has at least one surface that is a frosted surface, and the frosted surface is laminated with the weaving layer mutually.
The invention provides a method for manufacturing an electromagnetic shielding film, which comprises the steps of firstly adding special engineering plastics into prefabricated carbon nano tube dispersion liquid for processing, enabling the carbon nano tube dispersion liquid to be processed to form a polyetherimide solution, then adding a viscosity regulator and a surface wetting agent into the polyetherimide solution, further regulating the viscosity of the polyetherimide solution to be preset viscosity, finally drawing metal fibers and immersing the metal fibers into the polyetherimide solution, baking after drawing to remove a mixed solvent, the viscosity regulator and the surface wetting agent, thereby obtaining metal core conductive fibers coated with carbon nano tube modified polyetherimide; the electromagnetic shielding film obtained by the invention has electromagnetic shielding energy efficiency of more than or equal to 30dB, improves the shielding energy efficiency, and has the characteristics of high strength, corrosion resistance, wear resistance, good flexibility and weldability.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an electromagnetic shielding film provided in an embodiment of the present invention;
fig. 2 is a sectional view of an electromagnetic shielding film provided in an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.
Hereinafter, a method for manufacturing an electro-magnetic shielding film and an electro-magnetic shielding film according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a method for manufacturing an electromagnetic shielding film according to an embodiment of the present invention includes:
s10, providing a prefabricated carbon nano tube dispersion liquid;
s20, adding special engineering plastics into the carbon nano tube dispersion liquid, and adding a viscosity regulator and a surface wetting agent to obtain a polyetherimide solution with a preset viscosity;
s30, soaking the metal fiber in a polyetherimide solution to obtain a metal core conductive fiber coated with carbon nano tube modified polyetherimide;
s40, weaving the metal core conductive fibers to obtain fiber woven cloth;
and S50, pressing a polyether-ether-ketone film on the surface of the fiber woven cloth to obtain the electromagnetic shielding film.
The invention provides a method for manufacturing an electromagnetic shielding film, which comprises the steps of firstly adding special engineering plastics into prefabricated carbon nano tube dispersion liquid for processing, enabling the carbon nano tube dispersion liquid to be processed to form a polyetherimide solution, then adding a viscosity regulator and a surface wetting agent into the polyetherimide solution, further regulating the viscosity of the polyetherimide solution to be preset viscosity, finally drawing metal fibers and immersing the metal fibers into the polyetherimide solution, baking after drawing to remove a mixed solvent, the viscosity regulator and the surface wetting agent, thereby obtaining metal core conductive fibers coated with carbon nano tube modified polyetherimide; the electromagnetic shielding film obtained by the invention has the electromagnetic shielding energy efficiency of more than or equal to 30dB, improves the shielding energy efficiency, and has the characteristics of high strength, corrosion resistance, wear resistance, good flexibility and weldability.
Specifically, in step S10, the method for preparing the carbon nanotube dispersion liquid includes: providing a mixed solvent; adding a dispersing auxiliary agent and the carbon nano or sulfonated nano tube into the mixed solvent, and dispersing under a preset temperature condition and an ultrasonic condition to obtain a carbon nano tube dispersion liquid with the content of 0.1-3 wt%; the dispersing auxiliary agent accounts for 3-30% of the mass of the carbon nano tube.
In this embodiment, the predetermined temperature condition may be 3 to 100 ℃, the predetermined ultrasonic condition may be 50 to 500W, and the mixed solvent at least includes one or more of N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, dimethylsulfoxide, tetramethylene sulfone (sulfolane), diphenyl sulfone, and chloroform; when dispersing the carbon nanotubes or the sulfonated carbon nanotubes, a carbon nanotube aqueous dispersion agent (TNWDIS) may be added, and simultaneously a mixed solvent is added, and then ultrasonic dispersion is performed under an ultrasonic condition of a power of 50 to 500W while controlling a temperature at 30 to 100 ℃, thereby obtaining a carbon nanotube dispersion liquid.
Specifically, the step S20 includes: adding special engineering plastics into the carbon nano tube dispersion liquid to prepare a polyetherimide solution; the special engineering plastic comprises PEI, or comprises one or more of PAI, PES, PPSU, PSU and PEK-C with the content of 10-40% by mass of PEI; adding 0.1-1wt% of a viscosity modifier and 0.1-1wt% of a surface wetting agent to the polyetherimide solution to adjust the polyetherimide solution to a predetermined viscosity; the predetermined viscosity is 350 to 5000mPa.s.
In this example, the content of the mixed solvent in the polyetherimide solution is 40-80wt%, and the balance is solute such as filler and PEI or PEI mixture and dispersing aid; the special engineering plastic can comprise polyetherimide PEI or a mixture of polyetherimide PEI and one or more of imide PAI, polyether sulfone PES, polyphenylene sulfone PPSU, polysulfone PSU and polyaryletherketone PEK-C, and it is understood that 10-40% of the mass of PEI represents that the mass of PEI accounts for 10-40% of the mass of PEI in the obtained high molecular mixture; the polyetherimide solution is prepared by mixing the characteristic engineering plastic and the carbon nano tube dispersion liquid, the viscosity of the polyetherimide solution can reach 350-5000mPa.s after the viscosity regulator and the surface wetting agent are added into the polyetherimide solution, and the adhesive force of the polyetherimide solution is higher and the viscosity of the metal fiber is better when the metal fiber is soaked.
Optionally, dipping the metal fiber in the polyetherimide solution to obtain the metal core conductive fiber coated with the carbon nanotube modified polyetherimide, including: degreasing metal fibers with the diameter of 6-100 mu m, and soaking the metal fibers in a polyetherimide solution after degreasing; after soaking, baking the metal fiber at the temperature of 100-350 ℃ for 1-10 minutes to remove the mixed solvent, the viscosity regulator and the surface wetting agent to obtain the metal core conductive fiber coated with the carbon nano tube modified polyetherimide.
In this embodiment, 1 to 50 strands of metal fibers can be used as one bundle to be woven, the weaving mode can be the same as the existing weaving mode, in the weaving process, the metal fibers can be firstly pulled, in the middle of the pulling, oil removal treatment can be firstly carried out, the metal fibers are soaked in polyetherimide after the oil removal treatment, high-temperature baking can be carried out after the soaking is finished, so that the viscosity regulator and the surface wetting agent can be removed, and after the removal is finished, a plurality of bundles of metal fibers are wound and woven under the traction of a machine, so that the fiber woven cloth is obtained; alternatively, the diameter of the metal fiber may be 6-50um, more preferably 10-20um, for the PEI solution coating, baking and braiding process.
Specifically, the step S50 includes: preheating the fiber woven cloth and the polyether-ether-ketone film at 230-280 ℃, and then carrying out corona discharge treatment on the polyether-ether-ketone film; and coating the polyether-ether-ketone film subjected to corona discharge on the surface of the fiber woven cloth, and performing compression molding by adopting a compression roller or a compression plate at the temperature of 280-330 ℃ and the pressure of 0.5-3Mpa to obtain the electromagnetic shielding film.
In the embodiment, the polyetheretherketone film has at least one surface which is a frosted surface, and the roughness of the frosted surface is Ra0.4-Ra25; when the polyether-ether-ketone film and the fiber woven cloth are subjected to compression molding, the fiber woven cloth and the polyether-ether-ketone film can be preheated, the polyether-ether-ketone film can be subjected to corona discharge after preheating, the surface roughness and the surface activity of the polyether-ether-ketone film subjected to corona discharge treatment can be increased, so that the polyether-ether-ketone film has higher adhesiveness, and then the frosted surface of the polyether-ether-ketone film is attached to the fiber woven cloth after the corona discharge treatment and then enters a pressing roller or a pressing plate for compression molding, so that the electromagnetic shielding film is obtained; optionally, the frosting surface of the polyetheretherketone film is controlled within a stroke interval of 1-300s before pressing in the process of corona discharge; and the thickness of the polyetheretherketone film is 5-2000um, the output voltage of corona discharge is 2-100kV, and the discharge frequency is 2-100kHz.
Referring to fig. 2, the electromagnetic shielding film provided in the embodiment of the present invention includes a woven layer 10 and a thin film layer 20, where the woven layer 10 is woven by a plurality of bundles of metal core conductive fibers; the film layer 20 is coated on the surface of the braided layer 10 and is integrated with the braided layer 10; the film layer 20 has at least one surface thereof being a frosted surface, and the frosted surface is bonded to the braid 10.
In this embodiment, the thin film layer 20 may be the above-mentioned polyetheretherketone thin film, or may be another thin film, and the woven layer 10 may be obtained by weaving after being processed by the above-mentioned manufacturing method, and when the thin film layer 20 and the woven layer 10 are pressed and formed, they may be obtained by pressing by the above-mentioned manufacturing method, and of course, a person skilled in the art may also use another method to perform pressing and forming, so that the electromagnetic shielding film obtained by the present invention has an electromagnetic shielding energy efficiency of not less than 30dB, so that the electromagnetic shielding film has a high strength, is corrosion-resistant, wear-resistant, and has good flexibility, and is weldable.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for manufacturing an electromagnetic shielding film, comprising:
providing a prefabricated carbon nanotube dispersion;
adding special engineering plastics into the carbon nano tube dispersion liquid, and adding a viscosity regulator and a surface wetting agent to obtain a polyetherimide solution with a preset viscosity;
soaking a metal fiber in the polyetherimide solution to obtain a metal core conductive fiber coated with carbon nanotube modified polyetherimide;
weaving the metal core conductive fibers to obtain fiber woven cloth;
and pressing a polyether-ether-ketone film on the surface of the fiber woven cloth to obtain the electromagnetic shielding film.
2. The method for manufacturing an electromagnetic shielding film according to claim 1, wherein the method for prefabricating the carbon nanotube dispersion comprises:
providing a mixed solvent;
adding a dispersing auxiliary agent and the carbon nano or sulfonated nano tube into the mixed solvent, and dispersing under a preset temperature condition and an ultrasonic condition to obtain a carbon nano tube dispersion liquid with the content of 0.1-3 wt%; the dispersing auxiliary agent accounts for 3-30% of the mass of the carbon nano tube.
3. The method for manufacturing an electro-magnetic shielding film according to claim 2, wherein the mixed solvent at least comprises one or more of N-methylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, dimethylsulfoxide, tetramethylene sulfone (sulfolane), diphenyl sulfone, and chloroform.
4. The method for manufacturing an electromagnetic shielding film according to claim 1, wherein the step of adding a special engineering plastic to the carbon nanotube dispersion, and adding a viscosity modifier and a surface wetting agent to obtain a polyetherimide solution with a predetermined viscosity comprises:
adding special engineering plastics into the carbon nano tube dispersion liquid to prepare and obtain the polyetherimide solution; the special engineering plastic comprises PEI, or comprises one or more of PAI, PES, PPSU, PSU and PEK-C with the content of 10-40% by mass of PEI;
adding 0.1 to 1wt% of the viscosity modifier and 0.1 to 1wt% of the surface wetting agent to the polyetherimide solution to adjust the polyetherimide solution to a predetermined viscosity; the predetermined viscosity is 350 to 5000mPa.s.
5. The method for manufacturing an electromagnetic shielding film according to claim 2 or 3, wherein the step of immersing the metal fiber in the polyetherimide solution to obtain the metal core conductive fiber coated with the carbon nanotube modified polyetherimide comprises:
degreasing metal fibers with the diameter of 6-100um, and soaking the metal fibers in the polyetherimide solution after degreasing;
and after soaking, baking the metal fiber at the temperature of 100-350 ℃ for 1-10 minutes to remove the mixed solvent, the viscosity regulator and the surface wetting agent to obtain the metal core conductive fiber coated with the carbon nano tube modified polyetherimide.
6. The method for manufacturing an electromagnetic shielding film according to claim 1, wherein the pressing of the polyetheretherketone film on the surface of the fiber woven fabric to obtain the electromagnetic shielding film comprises:
preheating the fiber woven cloth and the polyether-ether-ketone film at 230-280 ℃, and then carrying out corona discharge treatment on the polyether-ether-ketone film;
and coating the polyether-ether-ketone film subjected to corona discharge on the surface of the fiber woven cloth, and performing compression molding by adopting a compression roller or a compression plate at the temperature of 280-330 ℃ and the pressure of 0.5-3Mpa to obtain the electromagnetic shielding film.
7. The method for manufacturing an electromagnetic shielding film according to claim 6, wherein the polyetheretherketone film has at least one frosted surface, and the roughness of the frosted surface is Ra0.4-Ra25.
8. The method of claim 6 or 7, wherein the polyetheretherketone film has a thickness of 5 to 2000um, an output voltage of 2 to 100kV and a discharge frequency of 2 to 100kHz.
9. An electromagnetic shielding film, comprising:
the braided layer is obtained by braiding a plurality of bundles of metal core conductive fibers;
the thin film layer is coated on the surface of the woven layer and is integrated with the woven layer.
10. The electromagnetic shielding film of claim 9, wherein the thin film layer has at least one frosted surface, and the frosted surface is attached to the woven layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210486715.7A CN115593043A (en) | 2022-05-06 | 2022-05-06 | Manufacturing method of electromagnetic shielding film and electromagnetic shielding film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210486715.7A CN115593043A (en) | 2022-05-06 | 2022-05-06 | Manufacturing method of electromagnetic shielding film and electromagnetic shielding film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115593043A true CN115593043A (en) | 2023-01-13 |
Family
ID=84842080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210486715.7A Pending CN115593043A (en) | 2022-05-06 | 2022-05-06 | Manufacturing method of electromagnetic shielding film and electromagnetic shielding film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115593043A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3142119A1 (en) * | 2022-11-17 | 2024-05-24 | Safran | PART MADE OF COMPOSITE MATERIAL AND ITS MANUFACTURING METHOD |
-
2022
- 2022-05-06 CN CN202210486715.7A patent/CN115593043A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3142119A1 (en) * | 2022-11-17 | 2024-05-24 | Safran | PART MADE OF COMPOSITE MATERIAL AND ITS MANUFACTURING METHOD |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10889070B2 (en) | Composite material including unidirectional continuous fibers and thermoplastic resin | |
| KR101770663B1 (en) | Sizing-agent-coated carbon fibers, process for producing sizing-agent-coated carbon fibers, carbon-fiber-reinforced composite material, and process for producing carbon-fiber-reinforced composite material | |
| CA2760974C (en) | Fiber composite material and method for production thereof | |
| CN115593043A (en) | Manufacturing method of electromagnetic shielding film and electromagnetic shielding film | |
| WO2010120426A1 (en) | Metal-coated fabrics for fiber-metal laminates | |
| RU2762955C2 (en) | Method and device for manufacturing carbon fibers | |
| US20180077828A1 (en) | Carbon Nanomaterial Composite Sheet and Method for Making the Same | |
| CN110423367A (en) | A kind of preparation method of fibre reinforced thermoplastic composite | |
| JP2011157524A (en) | Fiber-reinforced thermoplastic plastic, and method for manufacturing the same | |
| JP2000273762A (en) | Base fabric for electromagnetic wave-shielding material and electromagnetic wave-shielding material using the same | |
| JP4446754B2 (en) | Glass cloth | |
| JP2009242964A (en) | Carbon fiber and method for producing the same | |
| WO2012082280A1 (en) | Composites having distortional resin coated fibers | |
| JP2015531043A (en) | COMPOSITE TANK WITH JOINT WITH SOFTENIZED STRIP AND METHOD FOR PRODUCING THE TANK | |
| CN109468852B (en) | Fiber prepreg, fiber prepreg board and preparation method of fiber prepreg | |
| JP5960402B2 (en) | Carbon fiber bundle and method for producing carbon fiber bundle | |
| JP6497179B2 (en) | Gas diffusion layer and gas diffusion layer roll | |
| KR101888586B1 (en) | Method for surface treatment of continuous fiber and method for manufacturing thermoplastic-continuous fiber hybrid complex using the same | |
| JP5967333B1 (en) | Sizing agent coated carbon fiber, method for producing sizing agent coated carbon fiber, carbon fiber reinforced composite material, and method for producing carbon fiber reinforced composite material | |
| JP6351584B2 (en) | Apparatus for controlling stress of bonding at low temperature and manufacturing method thereof | |
| JP2546810B2 (en) | Carbon fiber coated with polycyanoaryl ether and method for producing the same | |
| JP2002274627A (en) | Conveying belt | |
| CN110527117B (en) | Method for manufacturing carbon fiber reinforced molding compound | |
| WO2023195383A1 (en) | Carbon fiber composite material | |
| JP2000327811A (en) | Prepreg |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |