Invention Grant
- Patent Title: Magnetic tape having characterized magnetic layer
-
Application No.: US16038884Application Date: 2018-07-18
-
Publication No.: US10854230B2Publication Date: 2020-12-01
- Inventor: Norihito Kasada , Toshio Tada , Eiki Ozawa , Takuto Kurokawa
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2017-140019 20170719; JP2018-131331 20180711
- Main IPC: G11B5/706
- IPC: G11B5/706 ; G11B5/708 ; G11B5/712 ; G11B5/71 ; G11B5/735 ; G11B5/714 ; G11B5/78 ; G11B5/84

Abstract:
The magnetic tape includes a magnetic layer including ferromagnetic powder, non-magnetic powder, and a binding agent and a back coating layer including non-magnetic powder and a binding agent, in which the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm, an intensity ratio of a peak intensity of a diffraction peak of a (110) plane with respect to a peak intensity of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, a vertical squareness ratio of the magnetic tape is 0.65 to 1.00, and a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding a surface of the back coating layer is equal to or smaller than 0.060.
Public/Granted literature
- US20190027180A1 MAGNETIC TAPE Public/Granted day:2019-01-24
Information query
IPC分类: