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公开(公告)号：US20220267540A1
公开(公告)日：2022-08-25
申请号：US17734213
申请日：2022-05-02
发明人： Kouji Yokotani , Nobuyuki Komatsu , Takeshi Hazama , Mayuko Tatemichi , Akio Higaki , Tatsuya Higuchi , Keiko Yamazaki
摘要： A fluororesin film contains a fluororesin. The fluororesin contains two fluororesin species having different composition ratios of polymerized units. The fluororesin film has on at least one surface thereof a ten-point average roughness of 0.100 to 1.200 μm and an arithmetic average roughness of 0.010 to 0.050 μm, and the fluororesin film has a breakdown strength of 400 V/μm or higher.
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公开(公告)号：US11845839B2
公开(公告)日：2023-12-19
申请号：US16762211
申请日：2018-10-29
发明人： Mayuko Tatemichi , Takeshi Hazama , Nobuyuki Komatsu , Tatsuya Higuchi , Kouji Yokotani , Akio Higaki , Tomohiro Tanaka
CPC分类号： C08J5/18 , H01G4/18 , H01G4/33 , B32B27/28 , B32B2327/18 , C08J2327/18 , C08J2327/20 , C08L27/18 , C08L27/20 , C08L2203/16 , G02B26/005 , H01G4/186
摘要： A film having a dielectric dissipation factor at a frequency of 1 kHz and 160° C. of 0.02% or lower and a dielectric breakdown strength at 160° C. of 400 V/μm or higher. Also disclosed is a film including at least one fluoropolymer selected from a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and a tetrafluoroethylene/hexafluoropropylene copolymer, the fluoropolymer having a crystallinity of 65% or higher.
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公开(公告)号：US10745531B2
公开(公告)日：2020-08-18
申请号：US15742971
申请日：2016-07-13
发明人： Takashi Kanemura , Eri Mukai , Takeshi Hazama , Tetsuhiro Kodani , Nobuyuki Komatsu , Hisako Nakamura , Kouji Yokotani , Mayuko Tatemichi , Akio Higaki
IPC分类号： C08J5/18 , H01G4/18 , B32B27/30 , H01G4/33 , H01L41/193 , C08F214/22 , C08F214/26 , H01G4/32 , H01L41/257
摘要： The present invention provides a film having excellent heat resistance and a small difference between the permittivity at low temperatures and the permittivity at high temperatures. The present invention provides a film having a relative permittivity of 8 or more at a frequency of 1 kHz at 30° C., wherein the rate of change is −8 to +8% as calculated from a relative permittivity A at a frequency of 1 kHz at 30° C. and a relative permittivity B at a frequency of 1 kHz at 150° C. according to the following formula: Rate of change(%)=(B−A)/A×100.
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公开(公告)号：US12090746B2
公开(公告)日：2024-09-17
申请号：US17043343
申请日：2019-03-26
发明人： Takeshi Hazama , Nobuyuki Komatsu , Kouji Yokotani , Mayuko Tatemichi , Akio Higaki , Tomohiro Tanaka
IPC分类号： B32B7/025 , B32B27/30 , C08F214/18
CPC分类号： B32B7/025 , B32B27/30 , C08F214/18
摘要： A radio wave absorbing material including a fluoropolymer. The fluoropolymer contains a vinylidene fluoride unit, and the radio wave absorbing material absorbs a radio wave having a frequency in a range of 1 MHz to 100 MHz.
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公开(公告)号：US11479647B2
公开(公告)日：2022-10-25
申请号：US16337186
申请日：2017-09-27
发明人： Takeshi Hazama , Nobuyuki Komatsu , Kouji Yokotani , Mayuko Tatemichi , Tatsuya Higuchi , Keiko Koga
IPC分类号： C08J5/18 , B32B15/08 , G02B26/00 , H01B3/44 , H01G4/18 , H01G4/33 , H01L41/08 , H01L41/193 , H01G4/32 , C08L27/16 , H01B5/16
摘要： The invention provides a film having a high relative permittivity, a high volume resistivity, and a high breakdown strength. The film has a relative permittivity of 9 or higher at a frequency of 1 kHz and 30° C., a volume resistivity of 5E+15 Ω·cm or higher at 30° C., and a breakdown strength of 500 V/μm or higher.
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公开(公告)号：US11352469B2
公开(公告)日：2022-06-07
申请号：US16480132
申请日：2018-01-17
发明人： Kouji Yokotani , Nobuyuki Komatsu , Takeshi Hazama , Mayuko Tatemichi , Akio Higaki , Tatsuya Higuchi , Keiko Yamazaki
摘要： A fluororesin film containing a fluororesin. The fluororesin film has on at least one surface thereof a ten-point average roughness of 0.100 to 1.200 μm and an arithmetic average roughness of 0.010 to 0.050 μm. Further, the fluororesin film has a breakdown strength of 400 V/μm or higher.
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