Title:
RADIO WAVE ABSORBER FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/033517
Kind Code:
A1
Abstract:
The present invention provides: a radio wave absorber film which is thin and exhibits excellent radio wave absorption performance; and a method for producing this radio wave absorber film. According to the present invention, a radio wave absorber film formed on a base material layer contains a magnetic body and a binder resin in a radio wave absorption layer; and an aromatic ester-urethane copolymer is used as the binder resin. The glass transition temperature of the binder resin is preferably 100°C or less, and more preferably 0°C or less. The magnetic body is preferably at least one substance that is selected from the group consisting of ε-iron oxide, a barium ferrite magnetic body and a strontium ferrite magnetic body.
Inventors:
OHKOSHI SHIN-ICHI (JP)
NAMAI ASUKA (JP)
YOSHIKIYO MARIE (JP)
HARA MASAYUKI (JP)
ASAI TAKAHIRO (JP)
NAMAI ASUKA (JP)
YOSHIKIYO MARIE (JP)
HARA MASAYUKI (JP)
ASAI TAKAHIRO (JP)
Application Number:
PCT/JP2020/029362
Publication Date:
February 25, 2021
Filing Date:
July 30, 2020
Export Citation:
Assignee:
UNIV TOKYO (JP)
TOKYO OHKA KOGYO CO LTD (JP)
TOKYO OHKA KOGYO CO LTD (JP)
International Classes:
B32B7/025; H01F1/117; H05K9/00
Domestic Patent References:
| WO2018235952A1 | 2018-12-27 | |||
| WO2006059771A1 | 2006-06-08 |
Foreign References:
| JP2003229694A | 2003-08-15 | |||
| JP2017184106A | 2017-10-05 | |||
| JPH01106317A | 1989-04-24 | |||
| JP2009060060A | 2009-03-19 | |||
| JP2008277726A | 2008-11-13 | |||
| JP2008174405A | 2008-07-31 |
Other References:
A.NAMAIS.SAKURAIM.NAKAJIMAT.SUEMOTOK.MATSUMOTOM.GOTOS.SA SAKIS.OHKOSHI, J.AM.CHEM.SOC., vol. 131, 2009, pages 1170 - 1173
A.NAMAIM.YOSHIKIYOK.YAMADAS.SAKURAIT.GOTOT.YOSHIDAT.MIYA ZAKIM.NAKAJIMAT.SUEMOTOH.TOKORO, NATURE COMMUNICATIONS, vol. 3, no. 1035, 2012, pages 1 - 6
S.OHKOSHI,S.KUROKI,S.SAKURAI,K.MATSUMOTO,K.SATO, AND S.SASAKI, ANGEW.CHEM.INT.ED., vol. 46, 2007, pages 8392 - 8395
JIAN JINSHINICHI OHKOSHIKAZUHITO HASHIMOTO, ADVANCED MATERIALS, vol. 16, no. 1, 2004, pages 48 - 51
SHIN-ICHI OHKOSHISHUNSUKE SAKURAIJIAN JINKAZUHITO HASHIMOTO, JOURNAL OF APPLIED PHYSICS, vol. 97, 2005, pages 10K312
SHUNSUKE SAKURAIJIAN JINKAZUHITO HASHIMOTOSHINICHI OHKOSHI, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, vol. 74, no. 7, July 2005 (2005-07-01), pages 1946 - 1949
ASUKA NAMAISHUNSUKE SAKURAIMAKOTO NAKAJIMATOHRU SUEMOTOKAZUYUKI MATSUMOTOMASAHIRO GOTOSHINYA SASAKISHINICHI OHKOSHI, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 131, 2009, pages 1170 - 1173
A.NAMAIM.YOSHIKIYOK.YAMADAS.SAKURAIT.GOTOT.YOSHIDAT.MIYA ZAKIM.NAKAJIMAT.SUEMOTOH.TOKORO, NATURE COMMUNICATIONS, vol. 3, no. 1035, 2012, pages 1 - 6
S.OHKOSHI,S.KUROKI,S.SAKURAI,K.MATSUMOTO,K.SATO, AND S.SASAKI, ANGEW.CHEM.INT.ED., vol. 46, 2007, pages 8392 - 8395
JIAN JINSHINICHI OHKOSHIKAZUHITO HASHIMOTO, ADVANCED MATERIALS, vol. 16, no. 1, 2004, pages 48 - 51
SHIN-ICHI OHKOSHISHUNSUKE SAKURAIJIAN JINKAZUHITO HASHIMOTO, JOURNAL OF APPLIED PHYSICS, vol. 97, 2005, pages 10K312
SHUNSUKE SAKURAIJIAN JINKAZUHITO HASHIMOTOSHINICHI OHKOSHI, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, vol. 74, no. 7, July 2005 (2005-07-01), pages 1946 - 1949
ASUKA NAMAISHUNSUKE SAKURAIMAKOTO NAKAJIMATOHRU SUEMOTOKAZUYUKI MATSUMOTOMASAHIRO GOTOSHINYA SASAKISHINICHI OHKOSHI, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 131, 2009, pages 1170 - 1173
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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