Invention Grant
- Patent Title: Magnetic tape having characterized magnetic layer
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Application No.: US15900345Application Date: 2018-02-20
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Publication No.: US10482913B2Publication Date: 2019-11-19
- 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: JP2017-029508 20170220
- Main IPC: G11B5/71
- IPC: G11B5/71 ; G11B5/712 ; G11B5/706 ; G11B5/008 ; G11B5/70 ; G11B5/708

Abstract:
A magnetic tape includes a non-magnetic support; a non-magnetic layer including non-magnetic powder and a binding agent on the non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic layer. The total thickness of the non-magnetic layer and the magnetic layer is less than or equal to 0.60 μm. The magnetic layer includes an abrasive, and the percentage of a plan view maximum area of the abrasive confirmed in a region having a size of 4.3 μm×6.3 μm of the surface of the magnetic layer with respect to the total area of the region, obtained by plane observation performed by using a scanning electron microscope, is greater than or equal to 0.02% and less than 0.06%. Also, the logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is less than or equal to 0.050.
Public/Granted literature
- US20180240495A1 MAGNETIC TAPE Public/Granted day:2018-08-23
Information query
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