WO2009031409A1 - Electromagnetic wave absorbing sheet - Google Patents

Electromagnetic wave absorbing sheet Download PDF

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Publication number
WO2009031409A1
WO2009031409A1 PCT/JP2008/064838 JP2008064838W WO2009031409A1 WO 2009031409 A1 WO2009031409 A1 WO 2009031409A1 JP 2008064838 W JP2008064838 W JP 2008064838W WO 2009031409 A1 WO2009031409 A1 WO 2009031409A1
Authority
WO
WIPO (PCT)
Prior art keywords
less
electromagnetic wave
absorbing sheet
wave absorbing
carbon nanocoil
Prior art date
Application number
PCT/JP2008/064838
Other languages
French (fr)
Japanese (ja)
Inventor
Yukihiro Fujiyama
Ryota Tomokane
Kenichiro Tanaka
Yugo Higashi
Toshikazu Nosaka
Seiji Akita
Yoshikazu Nakayama
Original Assignee
Public University Corporation Osaka Prefecture University
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 Public University Corporation Osaka Prefecture University filed Critical Public University Corporation Osaka Prefecture University
Publication of WO2009031409A1 publication Critical patent/WO2009031409A1/en

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Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

This invention provides an electromagnetic wave absorber which can absorb electromagnetic waves in the range of several GHz to several tens of GHz. The electromagnetic wave absorbing sheet contains a carbon nanocoil and a resin and is characterized in that (1) the carbon nanocoil has an average coil length of not less 1 μm and less than 100 μm, an average coil diameter of not less than 1 nm and less than 1μm, and an average coil pitch of not less than 1 nm and less than 1μm, and (2) the carbon nanocoil is contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the resin.
PCT/JP2008/064838 2007-09-03 2008-08-20 Electromagnetic wave absorbing sheet WO2009031409A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007228403A JP2009060060A (en) 2007-09-03 2007-09-03 Electromagnetic wave absorbing sheet
JP2007-228403 2007-09-03

Publications (1)

Publication Number Publication Date
WO2009031409A1 true WO2009031409A1 (en) 2009-03-12

Family

ID=40428729

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/064838 WO2009031409A1 (en) 2007-09-03 2008-08-20 Electromagnetic wave absorbing sheet

Country Status (2)

Country Link
JP (1) JP2009060060A (en)
WO (1) WO2009031409A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381756A3 (en) * 2010-04-26 2011-12-28 Nitto Denko Corporation Electromagnetic wave absorber
CN106163247A (en) * 2016-07-18 2016-11-23 福建星宏新材料科技有限公司 A kind of wide frequency domain absorbing material
WO2019235561A1 (en) * 2018-06-06 2019-12-12 株式会社新日本電波吸収体 Electromagnetic shielding material and signal processing unit provided with same
CN114654850A (en) * 2022-05-06 2022-06-24 漆定英 Polyimide composite film with electromagnetic shielding function and preparation method thereof

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5375498B2 (en) * 2009-10-01 2013-12-25 三菱エンジニアリングプラスチックス株式会社 Electromagnetic wave suppressing resin composition and molded product
JP5218362B2 (en) * 2009-10-01 2013-06-26 三菱エンジニアリングプラスチックス株式会社 Electromagnetic wave suppressing resin composition and molded product
JP5544883B2 (en) * 2010-01-05 2014-07-09 三菱エンジニアリングプラスチックス株式会社 Electromagnetic wave suppressing resin composition and molded product
JP5333255B2 (en) * 2010-01-19 2013-11-06 三菱エンジニアリングプラスチックス株式会社 Electromagnetic wave suppressing resin composition and molded product
JP5413215B2 (en) * 2010-01-25 2014-02-12 三菱エンジニアリングプラスチックス株式会社 Electromagnetic wave suppressing resin composition and molded product
JP5831921B2 (en) * 2011-03-30 2015-12-09 日東電工株式会社 Electromagnetic wave absorber and method for producing electromagnetic wave absorber
JP5835639B2 (en) * 2011-03-30 2015-12-24 日東電工株式会社 Electromagnetic wave absorber and method for producing electromagnetic wave absorber
JP2013135005A (en) * 2011-12-26 2013-07-08 Hitachi Zosen Corp Fibrous carbon-containing resin
KR101455116B1 (en) * 2012-09-21 2014-10-27 (주)창성 Electromagnetic Wave Absorber For Car Radar and Fabrication Method of The Same.
CN106344396A (en) * 2015-12-03 2017-01-25 福建星宏新材料科技有限公司 Micro-carbon spring compound ceramic ball
JP6661445B2 (en) 2016-03-31 2020-03-11 国立大学法人 東京大学 High frequency antenna element and high frequency antenna module
CN105979759A (en) * 2016-07-18 2016-09-28 福建星宏新材料科技有限公司 Wave-absorbing particle
JP6859652B2 (en) * 2016-10-11 2021-04-14 大同特殊鋼株式会社 Manufacturing method of high-frequency communication device and electromagnetic wave absorber for high-frequency communication device
KR102450588B1 (en) 2018-06-06 2022-10-04 고쿠리츠다이가쿠호우진 도쿄다이가쿠 Radio wave absorbing laminated film, manufacturing method thereof, and device comprising same
KR102061451B1 (en) 2019-05-13 2020-01-02 신라대학교 산학협력단 Process for the Preparation of Carbon Paper Containing Hybrid Materials of Carbon Microcoils-Carbon Nanocoils
US20220288633A1 (en) 2019-08-19 2022-09-15 The University Of Tokyo Radio wave absorber film and method for producing same
US20230307844A1 (en) 2020-05-13 2023-09-28 The University Of Tokyo Radio wave absorber and paste for forming radio wave absorber

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000232292A (en) * 1999-02-10 2000-08-22 Kansai Paint Co Ltd Radio-wave absorbing body
JP2002094283A (en) * 2000-09-11 2002-03-29 Seiji Motojima Coiled carbon fiber and its manufacturing method and electromagnetic absorption material
JP2004137459A (en) * 2002-08-23 2004-05-13 Seiji Motojima Resin particle containing coil-shaped carbon fiber, method for producing the same and foamed molded article
JP2005033015A (en) * 2003-07-14 2005-02-03 Seiji Motojima Electromagnetic wave absorbing body
JP2005327853A (en) * 2004-05-13 2005-11-24 Shin Etsu Polymer Co Ltd Electromagnetic wave noise suppressor and its manufacturing method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06235281A (en) * 1993-02-09 1994-08-23 Yoji Kozuka Radio wave shielding body and absorber
JP4684699B2 (en) * 2004-03-22 2011-05-18 東レ株式会社 Radio wave absorbing sheet material and radio wave absorber using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000232292A (en) * 1999-02-10 2000-08-22 Kansai Paint Co Ltd Radio-wave absorbing body
JP2002094283A (en) * 2000-09-11 2002-03-29 Seiji Motojima Coiled carbon fiber and its manufacturing method and electromagnetic absorption material
JP2004137459A (en) * 2002-08-23 2004-05-13 Seiji Motojima Resin particle containing coil-shaped carbon fiber, method for producing the same and foamed molded article
JP2005033015A (en) * 2003-07-14 2005-02-03 Seiji Motojima Electromagnetic wave absorbing body
JP2005327853A (en) * 2004-05-13 2005-11-24 Shin Etsu Polymer Co Ltd Electromagnetic wave noise suppressor and its manufacturing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2381756A3 (en) * 2010-04-26 2011-12-28 Nitto Denko Corporation Electromagnetic wave absorber
US8643531B2 (en) 2010-04-26 2014-02-04 Nitto Denko Corporation Electromagnetic wave absorber
CN106163247A (en) * 2016-07-18 2016-11-23 福建星宏新材料科技有限公司 A kind of wide frequency domain absorbing material
WO2019235561A1 (en) * 2018-06-06 2019-12-12 株式会社新日本電波吸収体 Electromagnetic shielding material and signal processing unit provided with same
CN114654850A (en) * 2022-05-06 2022-06-24 漆定英 Polyimide composite film with electromagnetic shielding function and preparation method thereof
CN114654850B (en) * 2022-05-06 2024-03-22 福州恒美光电材料有限公司 Polyimide composite film with electromagnetic shielding function and preparation method thereof

Also Published As

Publication number Publication date
JP2009060060A (en) 2009-03-19

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