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WO2008093489A1 - Electromagnetic wave absorber - Google Patents

Electromagnetic wave absorber Download PDF

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Publication number
WO2008093489A1
WO2008093489A1 PCT/JP2008/000047 JP2008000047W WO2008093489A1 WO 2008093489 A1 WO2008093489 A1 WO 2008093489A1 JP 2008000047 W JP2008000047 W JP 2008000047W WO 2008093489 A1 WO2008093489 A1 WO 2008093489A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnetic wave
conductive
fiber
wave absorber
complex
Prior art date
Application number
PCT/JP2008/000047
Other languages
French (fr)
Japanese (ja)
Inventor
Ryota Komiya
Tomohiro Kawakami
Ryokei Endo
Shunichiro Watanabe
Original Assignee
Kuraray Co., Ltd.
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 Kuraray Co., Ltd. filed Critical Kuraray Co., Ltd.
Priority to TW097103394A priority Critical patent/TW200840469A/en
Publication of WO2008093489A1 publication Critical patent/WO2008093489A1/en

Links

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
    • H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
    • C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Disclosed is an electromagnetic wave absorber which enables the electromagnetic wave absorption in a high frequency band and has low reflection and high absorption of an electromagnetic wave. The electromagnetic wave absorber comprises a complex of a conductive filler and a polymer matrix. The conductive filler comprises a conductive polyvinyl alcohol fiber. The conductive fiber comprises a conductive microparticle, and has a specific volume resistivity of 1 × 103 to 1 × 10-2 Ωcm. The conductive fiber has a fiber length of 0.1 to 50 mm and a fiber diameter of 30 to 200 μm in the complex.
PCT/JP2008/000047 2007-01-31 2008-01-18 Electromagnetic wave absorber WO2008093489A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW097103394A TW200840469A (en) 2007-01-31 2008-01-30 Electromagnetic wave absorber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-021578 2007-01-31
JP2007021578 2007-01-31

Publications (1)

Publication Number Publication Date
WO2008093489A1 true WO2008093489A1 (en) 2008-08-07

Family

ID=39673803

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/000047 WO2008093489A1 (en) 2007-01-31 2008-01-18 Electromagnetic wave absorber

Country Status (2)

Country Link
TW (1) TW200840469A (en)
WO (1) WO2008093489A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113165339A (en) * 2018-11-30 2021-07-23 积水化学工业株式会社 Conductive nonwoven fabric

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1027986A (en) * 1996-07-10 1998-01-27 Hitachi Maxell Ltd Radio wave absorber
JP2000277973A (en) * 1999-03-23 2000-10-06 Ten Kk Ferrite containing fiber and manufacture thereof
JP2005264419A (en) * 2004-02-18 2005-09-29 Kuraray Co Ltd Conductive polyvinyl alcohol fiber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1027986A (en) * 1996-07-10 1998-01-27 Hitachi Maxell Ltd Radio wave absorber
JP2000277973A (en) * 1999-03-23 2000-10-06 Ten Kk Ferrite containing fiber and manufacture thereof
JP2005264419A (en) * 2004-02-18 2005-09-29 Kuraray Co Ltd Conductive polyvinyl alcohol fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113165339A (en) * 2018-11-30 2021-07-23 积水化学工业株式会社 Conductive nonwoven fabric

Also Published As

Publication number Publication date
TW200840469A (en) 2008-10-01

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