Invention Grant
- Patent Title: Magnetic tape having characterized magnetic layer, tape cartridge, and recording and reproducing device
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Application No.: US15380309Application Date: 2016-12-15
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Publication No.: US10403319B2Publication Date: 2019-09-03
- Inventor: Norihito Kasada
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2015-245142 20151216; JP2016-014401 20160128; JP2016-241073 20161213
- Main IPC: G11B5/70
- IPC: G11B5/70 ; G11B5/78 ; G11B5/708

Abstract:
The magnetic tape includes a nonmagnetic layer containing nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer containing ferromagnetic powder, abrasive, and binder on the nonmagnetic layer, wherein a thickness of the nonmagnetic layer is less than or equal to 0.50 μm, a coefficient of friction as measured on a base portion of a surface of the magnetic layer is less than or equal to 0.35, and ΔSFD in a longitudinal direction of the magnetic tape as calculated with Equation 1, ΔSFD=SFD25° C.−SFD−190° C., is greater than or equal to 0.50, wherein, in Equation 1, SFD25° C. denotes a SFD as measured in the longitudinal direction of the magnetic tape in an environment with a temperature of 25° C., and SFD−190° C. denotes a SFD as measured in the longitudinal direction of the magnetic tape in an environment with a temperature of −190° C.
Public/Granted literature
- US20170178677A1 MAGNETIC TAPE, MAGNETIC TAPE CARTRIDGE, AND MAGNETIC RECORDING AND REPRODUCING DEVICE Public/Granted day:2017-06-22
Information query
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