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WO2018110969A1 - Matériau souple de protection contre les ondes électromagnétiques et son procédé de fabrication - Google Patents

Matériau souple de protection contre les ondes électromagnétiques et son procédé de fabrication Download PDF

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Publication number
WO2018110969A1
WO2018110969A1 PCT/KR2017/014635 KR2017014635W WO2018110969A1 WO 2018110969 A1 WO2018110969 A1 WO 2018110969A1 KR 2017014635 W KR2017014635 W KR 2017014635W WO 2018110969 A1 WO2018110969 A1 WO 2018110969A1
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WO
WIPO (PCT)
Prior art keywords
shielding material
electromagnetic shielding
nanofiber web
flexible electromagnetic
flexible
Prior art date
Application number
PCT/KR2017/014635
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English (en)
Korean (ko)
Inventor
서인용
정의영
이준우
Original Assignee
주식회사 아모그린텍
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 아모그린텍 filed Critical 주식회사 아모그린텍
Priority to US16/467,191 priority Critical patent/US10609848B2/en
Priority to CN201780077040.8A priority patent/CN110073733B/zh
Priority claimed from KR1020170171246A external-priority patent/KR101976545B1/ko
Publication of WO2018110969A1 publication Critical patent/WO2018110969A1/fr

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • 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

Definitions

  • the present invention relates to a flexible electromagnetic shielding material, and more particularly, to a flexible electromagnetic shielding material and a method of manufacturing the same.
  • Electromagnetic waves are a phenomenon in which energy moves in a sinusoidal shape while an electric field and a magnetic field interoperate with each other, and are useful for electronic devices such as wireless communication and radar.
  • the electric field is generated by a voltage and easily shielded by a distance or an obstacle such as a tree, while the magnetic field is generated by a current and is inversely proportional to the distance but not easily shielded.
  • the electromagnetic shielding material is typically made of a conductive material, and the electromagnetic waves radiated toward the electromagnetic shielding material are reflected back from the electromagnetic shielding material or flow to the ground to shield the electromagnetic wave.
  • an example of the electromagnetic shielding material may be a metal case or a metal plate, the electromagnetic shielding material is difficult to express the elasticity, and once manufactured, since it is not easy to deform / restore to various shapes, it is easily employed in various applications There is a difficult problem.
  • electric wave shielding materials such as metal plates and metal thin films are difficult to be closely contacted with parts that are the source of electromagnetic wave generation or parts that need protection from the source, and may be cracked due to bending at a step or uneven part, thereby preventing electromagnetic wave shielding performance. It may be difficult to express fully.
  • an electromagnetic shielding material in which a conductive coating layer is formed on a lightweight support member such as a polymer film has been recently introduced, but there is a limit in the electromagnetic shielding performance according to the limitation of the area that can be coated on the support member.
  • Films with a certain thickness or more have a lack of flexibility and are difficult to be completely adhered to a stepped or uneven part, and after being manufactured in a specific shape, it may be difficult to freely deform the shape.
  • cracks, peeling, etc. occur frequently in the conductive coating layer coated during the shape deformation.
  • the present invention has been made to solve the above-mentioned problems, and is excellent in elasticity, so that the shape can be freely modified as desired, so that it can be completely adhered to various shapes / structures such as unevenness or step of the application mounting surface to which the electromagnetic shielding material is employed. It is an object to provide a flexible electromagnetic shielding material that can be.
  • another object of the present invention is to provide a flexible electromagnetic shielding material in which the deterioration of the electromagnetic shielding performance is prevented even in various shape changes.
  • the present invention provides an electromagnetic wave shielding circuit module and an electronic device having the same, which can be easily employed in a light and small and small sized electronic device or a flexible electronic device having a component with a high density in a small area. There is this.
  • the present invention is provided with a nanofiber web formed of nanofibers and comprising a plurality of pores and a metal layer covering at least a portion of the nanofibers disposed on the surface portion of the nanofiber web, Conductive nanofiber webs having at least a portion of metal particles; And a stretchable member bonded to one surface of the metal layer conductive nanofiber web.
  • the nanofibers may be formed of a fiber-forming component including at least one selected from the group consisting of PVDF-based resins and urethane-based resins.
  • the fiber forming component may include a PVDF resin and a urethane resin in a weight ratio of 1: 0.43 to 2.35.
  • the nanofibers may have an average diameter of 150nm to 5 ⁇ m.
  • the nanofiber web may have a thickness of 4 ⁇ 30 ⁇ m, the basis weight may be 3.00 ⁇ 20.00g / m2.
  • the conductive nanofiber web may be formed through a spinning solution containing a resin, a solvent, and metal particles, the spinning solution is nickel, copper, silver, gold, chromium, platinum, titanium with respect to 100 parts by weight of the resin 30 to 70 parts by weight of metal particles including one or more selected from the group consisting of alloys and stainless steel may be provided.
  • the conductive nanofiber web may have a porosity of 30 to 80%.
  • the elastic member may be formed including a urethane-based resin.
  • the stretchable member may have an average thickness of 10 to 150 ⁇ m.
  • the metal layer may include at least one metal selected from the group consisting of nickel (Ni) and copper (Cu).
  • the metal layer may be formed by sequentially stacking nickel (Ni), copper (Cu), and nickel (Ni).
  • the metal layer may have an average thickness of 1 to 5 ⁇ m.
  • the present invention (1) forming a nanofiber web having metal particles in at least a portion of the pores; (2) forming an elastic member on the lower surface of the nanofiber web; And (3) forming a metal layer to cover at least a portion of the nanofibers disposed on the surface portion of the nanofiber web to manufacture the conductive nanofiber web.
  • step (1) may be performed by electrospinning a spinning solution containing a fiber forming component, a solvent, and metal particles.
  • the present invention is a circuit board mounted element; And the above-described flexible electromagnetic shielding material provided on the circuit board to cover at least the upper and side portions of the device.
  • the present invention provides an electronic device including the electromagnetic shielding circuit module.
  • the electromagnetic wave shielding material according to the present invention has excellent elasticity and can be freely deformed as desired, and can be attached so as to be in close contact with a curved shape such as unevenness or step of the application surface on which the electromagnetic wave shielding material is disposed.
  • deterioration of the electromagnetic wave shielding performance can be prevented even with various shape changes.
  • parts are provided with high density in a small area, they can be provided in close contact with the mounted parts by overcoming the dense spacing and step between parts, thereby providing excellent electromagnetic wave shielding performance. Or can be easily employed in flexible electronics.
  • FIG. 1 is a cross-sectional view of a flexible electromagnetic shielding material according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of an electromagnetic shielding circuit module according to an embodiment of the present invention.
  • the flexible electronic vehicle shielding material 1000 is formed of nanofibers and includes a plurality of pores (H) and a nanofiber web 110 and the nanofiber web 110.
  • a conductive nanofiber web 100 having a metal layer 130 covering at least a portion of the nanofibers disposed on the surface portion of the nanofibers, and having metal particles 120 in at least a portion of the pores;
  • an elastic member 200 bonded to one surface of the conductive nanofiber web 100.
  • the nanofiber web 110 provided in the conductive nanofiber web 100 has a three-dimensional network structure, and includes a plurality of pores (H), the plurality of pores (H) to the nanofiber web (110) It may be formed surrounded by the nanofibers to form.
  • the nanofibers may form nanofiber webs, and may be formed using any resin that may be commonly used in the art to express the elasticity of the nanofiber webs, and preferably, polyurethane , Polystyrene, polyvinylalchol, polymethyl methacrylate, polylactic acid, polyethylene oxide, polyvinyl acetate, polyacrylic acid , Polycaprolactone, polyacrylonitrile, polyvinylpyrrolidone, polyvinylchloride, polycarbonate, PC (polycarbonate), polyetherimide, polyethersulfone polyesthersulphone, polybenzimidazol, polyethylene terephthalate, polybutylene terephthal At least one selected from the group consisting of fluorine-based compound and a byte can be formed of a resin containing.
  • polyurethane Polystyrene, polyvinylalchol, polymethyl methacrylate, polylactic acid, polyethylene oxide, polyvinyl acetate, polyacrylic acid , Poly
  • the fluorine-based compound is polytetrafluoroethylene (PTFE) -based, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) -based, tetrafluoroethylene-hexafluoropropylene copolymer (FEP) -based, Tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (EPE) system, tetrafluoroethylene-ethylene copolymer (ETFE) system, polychlorotrifluoroethylene (PCTFE) system, chlorotrifluoro It may be one species selected from the group consisting of a low ethylene-ethylene copolymer (ECTFE) system and a polyvinylidene fluoride (PVDF) system.
  • PTFE polytetrafluoroethylene
  • PFA tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer
  • the nanofibers are PVDF, which is a fluorine-based compound, such that the nanofiber webs 110 formed of the nanofibers and the conductive nanofiber webs 100 having the same exhibit enhanced elasticity, heat resistance, chemical resistance, and mechanical strength.
  • the fiber-forming component including at least one selected from the group consisting of a resin and a urethane resin may be blended and spun on a spinning solution.
  • the fiber forming component may include PVDF-based resin and urethane-based resin in a weight ratio of 1: 0.43 to 2.35, preferably in a weight ratio of 1: 0.5 to 2, and most preferably in a weight ratio of 1: 1. have. If the weight ratio of the PVDF-based resin and the urethane-based resin is less than 1: 0.43, the elasticity of the flexible electromagnetic shielding agent may be lowered. If the weight ratio is greater than 1: 2.35, the mechanical properties may be reduced.
  • the nanofibers are not limited as long as the nanofibers having an average diameter capable of forming a web in the art, preferably the average diameter is 150nm ⁇ 5 ⁇ m, more preferably the average diameter is 150 ⁇ 700 Nm, and more preferably, the average diameter may be 200 ⁇ 600nm. If the average diameter of the nanofibers is less than 150nm, the mechanical strength of the produced flexible electromagnetic shielding material may be lowered, and if the average diameter is larger than 5 ⁇ m, the elasticity may be lowered.
  • the nanofiber web 110 may have a thickness of 4 to 30 ⁇ m, more preferably 4 to 13 ⁇ m, and more preferably 5 to 12 ⁇ m thickness. If the thickness of the nanofiber web 110 is less than 4 ⁇ m mechanical strength may be lowered or handling may not be easy, interlaminar peeling may occur, if the thickness exceeds 30 ⁇ m elasticity may be reduced have.
  • the nanofiber web 110 may have a basis weight of 3 to 20 g / m 2, preferably a basis weight of 5 to 15 g / m 2. If the basis weight of the nanofiber web 110 is less than 3 g / m2 mechanical strength may be lowered or handling may not be easy, interlaminar peeling may occur, if the basis weight exceeds 20 g / m2 stretch This can be degraded.
  • the metal particles 120 are provided in at least a portion of the pores of the conductive nanofiber web 100 to maintain a shielding force of the flexible electromagnetic shielding material 1000.
  • the metal particles 120 may be at least one selected from the group consisting of nickel, copper, silver, gold, chromium, platinum, titanium alloys and stainless steel, preferably nickel or silver, more preferably nickel nano Using rods or silver nanorods may be more advantageous for maintaining shielding force.
  • the metal particles 120 may be provided with 30 to 70 parts by weight, preferably 35 to 65 parts by weight with respect to 100 parts by weight of the fiber forming component.
  • the metal particles may be provided in an amount of 50 parts by weight based on 100 parts by weight of the fiber forming component. If the metal particles 120 is less than 30 parts by weight with respect to 100 parts by weight of the nanofiber web 110, the holding force of the shielding efficiency may be lowered. If the metal particles 120 are greater than 70 parts by weight, the elasticity may be reduced.
  • the metal particles 120 are provided in at least a portion of pores of the conductive nanofiber web 100 and are not limited as long as they can improve the elasticity of the conductive nanofiber web 100.
  • the diameter may be 0.7 to 1.1 ⁇ m and the length is 1.5 to 3.5 ⁇ m, preferably 0.8 to 1.1 ⁇ m in diameter and 2 to 3 ⁇ m in length, but is not limited thereto.
  • the conductive nanofiber web 100 includes a metal layer 130 covering at least a portion of the nanofibers disposed on the surface portion of the nanofiber web 110.
  • the term 'surface portion' used in the present invention indicates nanofibers exposed to the surface when the nanofiber web 110 is viewed from the top regardless of depth.
  • the portion in which the metal layer 130 is formed in the AB region may be referred to as a part of the nanofibers disposed on the surface portion of the nanofiber web 110.
  • the nanofibers When the portion exposed in the upper direction of the web 110 includes pores, it is a range included in the surface portion from the nanofiber web 110 to the exposed pores.
  • the metal layer 130 may be provided over the AB region, where A represents the uppermost point of the metal layer 130 formed on the surface portion, and B represents the uppermost point of the metal layer 130 formed on the surface portion. Represent the lowest point.
  • the point B represents the lowermost portion of the metal layer 130 formed in the exposed pores.
  • the metal layer 130 may have an average thickness of 1 to 5 ⁇ m, and preferably an average thickness of 2 to 4 ⁇ m. If the average thickness of the metal layer 130 is less than 1 ⁇ m, the shielding force may be lowered. If the average thickness exceeds 5 ⁇ m, the elasticity may be reduced.
  • the metal layer 130 may be formed using any material as long as it can improve the shielding power in the art, preferably formed of one or more metals selected from the group consisting of nickel and copper. And, more preferably, forming nickel, copper and nickel so as to be sequentially stacked may be advantageous for improving the shielding force, elasticity.
  • the first nickel layer functions to facilitate the formation of the copper layer
  • the copper layer is twice the electrical conductivity of the electromagnetic wave shielding material manufactured.
  • the third nickel layer may serve to prevent oxidation of the copper layer.
  • the porosity of the conductive nanofiber web 100 is not limited as long as it can improve the elasticity, preferably 30 to 80%, more preferably 40 to 70%. If the porosity of the conductive nanofiber web 100 is less than 30%, the elasticity may be lowered. If the porosity exceeds 80%, mechanical properties may be lowered and interlayer peeling may occur.
  • the stretchable member 200 serves to improve the stretchability of the flexible electromagnetic wave shielding material, and can be used without limitation as long as it is a material capable of improving the stretchability, and preferably, a urethane-based film is used. It may be more advantageous to improve the elasticity of the (1000).
  • the stretchable member 200 is not limited as long as it can improve the stretchability of the flexible electromagnetic shielding material 1000, and preferably, the average thickness may be 10 to 150 ⁇ m, and more preferably, the average thickness may be 25 to 110 ⁇ m. And, more preferably, the average thickness may be 30 ⁇ 100 ⁇ m. If the average thickness of the stretchable member 200 is less than 10 ⁇ m, the stretchability may be reduced. If the average thickness exceeds 150 ⁇ m, interlayer peeling may occur.
  • the electromagnetic shielding material (1) forming a nanofiber web having metal particles in at least a portion of the pores; (2) forming an elastic member on the lower surface of the nanofiber web; And (3) forming a metal layer to cover at least a portion of the nanofibers disposed on the surface portion of the nanofiber web to produce a conductive nanofiber web.
  • step (1) the step of forming the nanofiber web 110 having the metal particles 120 in at least a portion of the pores.
  • the method of providing the metal particles 120 in at least a portion of the pores of the nanofiber web 110 may be used without limitation as long as it is a method commonly used in the art, and preferably, a fiber forming component, a solvent, and a metal particle. Electrospinning a spinning solution comprising a may form a nanofiber web 110 having a metal particle 120 in at least a portion of the pores.
  • the electrospinning can be appropriately selected dry electrospinning or wet electrospinning in consideration of the type of fiber-forming component, the type of solvent and the like contained in the spinning solution, the present invention is not particularly limited thereto.
  • the method for producing a nanofiber web through the spun nanofibers can be prepared through a known method for producing a fibrous web.
  • the fibrous mat collected and accumulated in the collector may be manufactured through a calendering process, but is not limited thereto.
  • step (2) the step of forming the elastic member 200 on the lower surface of the nanofiber web 110.
  • the method for forming the stretchable member 200 on the lower surface of the nanofiber web 110 may be formed by a method commonly used in the art, and preferably with the stretchable member 200 through heat fusion.
  • the lower surface of the nanofiber web 110 in contact with the upper surface of the elastic member 200 may be laminated.
  • the present invention is not particularly limited thereto.
  • step to form a conductive nanofiber web 100 by forming a metal layer 130 to cover at least a portion of the nanofiber disposed on the surface portion of the nanofiber web 110 Perform the steps.
  • the metal layer 130 may be used without limitation as long as it is a method of forming a metal layer commonly used in the art, and may be preferably formed by a method such as electroless plating, sputtering, screen printing and casting, and more preferably. Preferably, it may be formed through electroless plating, screen printing or casting, and more preferably, may be formed through electroless plating or screen printing, but is not limited thereto.
  • the above-described flexible electromagnetic shielding material 1100 is implemented as an electromagnetic shielding circuit module 2000 as shown in FIG. 2, and specifically, at least the devices 1310 and 1320 on the circuit board 1200 on which the devices 1310 and 1320 are mounted.
  • An electromagnetic shielding material 1100 may be provided on the circuit board 1200 to cover the upper and side portions of the substrate.
  • the circuit board 1200 may be a known circuit board provided in an electronic device.
  • the circuit board 1200 may be a PCB or an FPCB. Since the size and thickness of the circuit board 1200 can be changed according to the internal design of the electronic device to be implemented, the present invention is not particularly limited thereto.
  • Electromagnetic shielding material 1100 according to an embodiment of the present invention, even if the separation distance between the adjacent elements (1310, 1320) is narrow or the step is caused by the thickness of the elements 1310, 1320 as shown in FIG. As it can be attached in close contact, it is advantageous to express more improved electromagnetic shielding performance.
  • the electromagnetic wave shielding material according to the present invention has excellent elasticity and can be freely deformed as desired, and can be attached so as to be in close contact with a curved shape such as unevenness or step of the application surface on which the electromagnetic wave shielding material is disposed.
  • deterioration of the electromagnetic wave shielding performance can be prevented even with various shape changes.
  • parts are provided with high density in a small area, they can be provided in close contact with the mounted parts by overcoming the dense spacing and step between parts, thereby providing excellent electromagnetic wave shielding performance. Or can be easily employed in flexible electronics.
  • polyvinylidene fluoride and polyurethane are mixed in a weight ratio of 1: 1 as a fiber-forming component, and 15 g of the fiber-forming component is 85 g with a weight ratio of dimethylacetamide and acetone as 70:30. It was dissolved in a magnetic bar at a temperature of 80 °C for 6 hours to prepare a mixed solution. 50 parts by weight of a nickel rod having an average diameter of 1 ⁇ m and an average length of 2.5 ⁇ m was mixed with the mixed solution using a mixing mixer with respect to 100 parts by weight of the fiber forming component.
  • the spinning solution was put into a solution tank of an electrospinning apparatus and discharged at a rate of 15 ⁇ l / min / hole.
  • the temperature of the radiation section is maintained at 30, the humidity is 50%, the distance between the collector and the spinneret tip is 20 cm, and a high voltage generator is used to impart a voltage of 40 kV or more to the spin nozzle pack.
  • a nanofiber web formed of PVDF / PU composite nanofibers was prepared by imparting an air pressure of 0.03 MPa per pack nozzle.
  • a calendering process was performed by applying heat and pressure at a temperature of 140 ° C. or higher and 1 kgf / cm 2 to dry the solvent and moisture remaining in the nanofiber web.
  • the thickness of the produced nanofiber web is 10 ⁇ m
  • the basis weight was 9.2g / m2.
  • a polyurethane film having an average thickness of 100 ⁇ m was thermally fused at a temperature of 140 ° C. as a stretchable member on the bottom surface of the nanofiber web, and the stretchable member was laminated on the bottom surface of the nanofiber web.
  • nickel, copper, and nickel were sequentially electrolessly plated so as to cover at least a portion of the nanofibers disposed on the upper surface portion of the laminated nanofiber web to form a metal layer having an average thickness of 3 ⁇ m, thereby manufacturing a flexible electromagnetic shielding material.
  • the conductive nanofiber web provided in the manufactured flexible electromagnetic shielding agent had a porosity of 40%.
  • Elasticity (elastic recovery rate) (%) [(length extended by external force)-(length removed by external force)] / [(length extended by external force)-(initial length)] ⁇ 100 (%)
  • the resistance of the surface of the conductive fibrous web was measured through a resistance meter (HIOKI 3540 m ⁇ HITESTER, HIOKI) for the flexible electromagnetic shielding material prepared according to Examples and Comparative Examples. Based on the measured value of Comparative Example 1 measured as 100, the measured resistance value according to the example was expressed as a relative percentage.
  • Example 9 Example 10 Example 11 Example 12 Example 13 Nano Fiber Web Thickness ( ⁇ m) 10 10 10 10 10 Basis weight (g / m2) 15 25 9.2 9.2 9.2 9.2 9.2 Metal particles Content (parts by weight) 50 50 20 35 65 80 Metal layer Thickness ( ⁇ m) 3 3 3 3 3 3 3 3 Conductive Nanofiber Web Porosity (%) 37 26 84 70 36 24 Elastic members Thickness ( ⁇ m) 100 100 100 100 100 100 elasticity(%) 92 76 94 96 90 70 Initial electromagnetic shielding performance (%) 87.0 87.1 84.3 87.1 87.3 87.4 Electromagnetic shielding performance change rate (%) 4.5 4.4 23.9 4.9 3.5 2.9 Delamination Prevention Assessment ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • Example 1 3, 4, 7, 8, 11 satisfying the thickness and basis weight of the nanofiber web according to the present invention, the metal particle content, the porosity of the conductive nanofiber web, the thickness of the metal layer and the thickness of the stretchable member, etc. , 12, 15, 16, 19, and 20 are elastic and initial compared to Examples 2, 5, 6, 9, 10, 13, 14, 17, 18, 21 and Comparative Examples 1-3, in which any of these are missing.
  • Examples 2, 5, 6, 9, 10, 13, 14, 17, 18, 21 and Comparative Examples 1-3 in which any of these are missing
  • the effects of excellent electromagnetic shielding performance, small change rate of electromagnetic shielding performance, and no delamination were simultaneously achieved.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne un matériau souple de protection contre les ondes électromagnétiques. Selon un mode de réalisation de l'invention, le matériau de protection contre les ondes électromagnétiques comprend : une bande de nanofibres conductrice présentant une bande de nanofibres formée de nanofibres et comprenant une pluralité de pores et une couche métallique recouvrant une partie des nanofibres disposées sur une partie de surface de la bande de nanofibres, dans laquelle des particules métalliques sont disposées sur au moins une partie des pores ; et un élément élastique lié à une surface de la couche métallique de la bande de nanofibres conductrice. Grâce à ces caractéristiques, puisque le matériau de protection contre les ondes électromagnétiques dispose d'une excellente élasticité, la forme du matériau de protection contre les ondes électromagnétiques peut être modifiée librement selon les besoins et ce dernier peut être fixé de façon à adhérer complètement à une surface même si cette dernière est de forme incurvée telles que des surfaces irrégulières ou étagées, ce qui permet d'obtenir une excellente performance de protection contre les ondes électromagnétiques. En outre, une dégradation de la performance de protection contre les ondes électromagnétiques peut être empêchée même en cas de divers changements de forme. Par ailleurs, même lorsque des composants sont montés avec une densité élevée dans une zone étroite, le matériau de protection contre les ondes électromagnétiques peut être fourni de manière à adhérer complètement aux composants montés en palliant un espacement étroit et des étages entre les composants, de telle sorte que le matériau de protection contre les ondes électromagnétiques peut être facilement adopté dans des dispositifs électroniques compacts ou souples.
PCT/KR2017/014635 2016-12-13 2017-12-13 Matériau souple de protection contre les ondes électromagnétiques et son procédé de fabrication WO2018110969A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/467,191 US10609848B2 (en) 2016-12-13 2017-12-13 Flexible electromagnetic wave shielding material and manufacturing method therefor
CN201780077040.8A CN110073733B (zh) 2016-12-13 2017-12-13 柔性电磁波屏蔽材料及其制造方法

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KR10-2016-0169487 2016-12-13
KR20160169487 2016-12-13
KR1020170171246A KR101976545B1 (ko) 2016-12-13 2017-12-13 플렉서블 전자파 차폐재 및 이의 제조방법
KR10-2017-0171246 2017-12-13

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Publication number Priority date Publication date Assignee Title
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JP2000138426A (ja) * 1998-11-02 2000-05-16 Tomoegawa Paper Co Ltd 電磁波シールド用金属繊維シート付フレキシブルプリント基板及びその製造方法
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KR20130136386A (ko) * 2012-06-04 2013-12-12 주식회사 아모그린텍 전자파 차폐시트, 그 제조방법 및 이를 구비한 내장형 안테나
KR101424030B1 (ko) * 2014-01-13 2014-07-28 톱텍에이치앤에스 주식회사 전자파 차폐막

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10316901A (ja) * 1997-05-22 1998-12-02 Toyoda Gosei Co Ltd 導電性塗料
JP2000138426A (ja) * 1998-11-02 2000-05-16 Tomoegawa Paper Co Ltd 電磁波シールド用金属繊維シート付フレキシブルプリント基板及びその製造方法
KR20090038994A (ko) * 2007-10-17 2009-04-22 손충연 부도체를 지지체로 사용하는 도전성 양면테이프
KR20130136386A (ko) * 2012-06-04 2013-12-12 주식회사 아모그린텍 전자파 차폐시트, 그 제조방법 및 이를 구비한 내장형 안테나
KR101424030B1 (ko) * 2014-01-13 2014-07-28 톱텍에이치앤에스 주식회사 전자파 차폐막

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