-
公开(公告)号：US11477925B2
公开(公告)日：2022-10-18
申请号：US16476842
申请日：2018-01-05
申请人： Maxell, Ltd.
发明人： Masayuki Toyoda , Masao Fujita
摘要： Provided is an electromagnetic-wave interference type electromagnetic-wave absorbing sheet that can favorably absorb electromagnetic waves in a desired frequency band while having high flexibility and light transmittance and being handled easily. The electromagnetic-wave absorbing sheet having flexibility and light transmittance includes an electric resistance film 1, a dielectric layer 2 and an electromagnetic-wave shielding layer 3 that each have light transmittance and that are stacked. The electric resistance film is formed of a conductive organic polymer, and the electromagnetic-wave shielding layer has an aperture ratio of 35% or more and 85% or less.
-
公开(公告)号：US11587705B2
公开(公告)日：2023-02-21
申请号：US16645547
申请日：2018-09-12
申请人： Maxell, Ltd.
发明人： Masao Fujita , Toshio Hiroi
摘要： Provided is an electromagnetic-wave absorber composition and an electromagnetic-wave absorber that can favorably absorb a plurality of electromagnetic waves of different frequencies in a high frequency band in or above the millimeter-wave band. The electromagnetic-wave absorber composition includes a magnetic iron oxide that magnetically resonates at a high frequency in or above the millimeter-wave band and a resin binder. The electromagnetic-wave absorber composition has two or more extrema separated from each other on a differential curve obtained by differentiating a magnetic property hysteresis loop at an applied magnetic field intensity of from 16 kOe to −16 kOe. The electromagnetic-wave absorber includes an electromagnetic-wave absorbing layer formed of the above-described electromagnetic-wave absorber composition.
-
公开(公告)号：US11515643B2
公开(公告)日：2022-11-29
申请号：US17473450
申请日：2021-09-13
申请人： Maxell, Ltd.
发明人： Masao Fujita , Toshio Hiroi
摘要： An electromagnetic wave absorbing sheet is provided that can adequately absorb electromagnetic waves at high frequencies in and above the millimeter wave band, can have excellent flexibility, and can easily be placed in any desired portion.
The electromagnetic wave absorbing sheet includes an electromagnetic wave absorbing layer 1 containing a magnetic iron oxide 1a that magnetically resonates at frequencies in and above the millimeter wave band and a resin binder 1b. The electromagnetic wave absorbing sheet absorbs radiated electromagnetic waves by magnetic resonance of the magnetic iron oxide. The electromagnetic wave absorbing sheet has a flexibility evaluation value F (g/mm2) of more than 0 and 6 or less, which is determined by measuring an applied weight (g) that is required to bend a ribbon-like electromagnetic wave absorbing sheet in the elastic deformation region so that a distance d between the inner surfaces of the ribbon-like sheet at a position L spaced 10 mm from the bent portion of the ribbon-like sheet is 10 mm, and dividing the applied weight (g) by a cross-sectional area D (mm2) of the ribbon-like sheet.-
公开(公告)号：US09767835B2
公开(公告)日：2017-09-19
申请号：US15054887
申请日：2016-02-26
申请人： HITACHI MAXELL, LTD.
发明人： Kenji Tanaka , Masao Fujita , Sadamu Kuse
CPC分类号： G11B5/71 , G11B5/70615 , G11B5/70626 , G11B5/714 , G11B5/738 , G11B5/78
摘要： A magnetic recording medium of the present invention is a magnetic recording medium including a non-magnetic substrate; a non-magnetic layer that is formed on one of principal surfaces of the non-magnetic substrate and contains a non-magnetic powder, a binder, and a lubricant; and a magnetic layer that is formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate and contains a magnetic powder and a binder. The magnetic powder has an average particle size between 10 nm and 35 nm inclusive. The lubricant is migratable to the magnetic layer and forms a lubricant layer on a surface of the magnetic layer when a pressure is applied to the magnetic layer. When spacing of the surface of the magnetic layer before and after washing the lubricant with n-hexane is measured with a TSA (Tape Spacing Analyzer), the value of the spacing after washing is 3 to 10 nm, and the value of the spacing before washing is 1 to 5 nm smaller than the value of the spacing after washing.
-
-
-
搜索结果
4 条记录 (耗时 0.011 秒)
