公开(公告)号：US20240112697A1

公开(公告)日：2024-04-04

申请号：US18467426

申请日：2023-09-14

申请人： FUJIFILM Corporation

发明人： Takuto KUROKAWA ,  Yujin SHIBATA ,  Norihito KASADA ,  So MATSUYAMA

IPC分类号： G11B5/62 ,  G11B5/008 ,  G11B5/588 ,  G11B5/84

CPC分类号： G11B5/62 ,  G11B5/00817 ,  G11B5/588 ,  G11B5/84

摘要： The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which an AlFeSil abrasion value measured on a surface of the magnetic layer is 20 μm or more and 50 μm or less, and standard deviation a of the AlFeSil abrasion value obtained in a width direction of the surface of the magnetic layer is 5.0 μm or less.

公开(公告)号：US20220270644A1

公开(公告)日：2022-08-25

申请号：US17673314

申请日：2022-02-16

申请人： FUJIFILM Corporation

发明人： Takuto KUROKAWA ,  Norihito KASADA ,  So MATSUYAMA

IPC分类号： G11B5/706 ,  G11B5/735 ,  G11B5/592 ,  G11B5/708

摘要： The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A rate of change (AlFeSil abrasion value 2/AlFeSil abrasion value 1) in AlFeSil abrasion value measured on a surface of the magnetic layer before and after storage of the magnetic tape in an environment of a temperature of 23° C. and a relative humidity of 50% is 0.7 or more.

公开(公告)号：US20220020393A1

公开(公告)日：2022-01-20

申请号：US17376175

申请日：2021-07-15

申请人： FUJIFILM Corporation

发明人： Takuto KUROKAWA ,  So MATSUYAMA ,  Norihito KASADA

IPC分类号： G11B5/706 ,  G11B5/735 ,  G11B5/714 ,  G11B5/592 ,  G11B5/73

摘要： The magnetic tape includes a non-magnetic support and a magnetic layer including a ferromagnetic powder, in which in an environment of a temperature of 23° C. and a relative humidity of 50%, an AlFeSil abrasion value0.2 N on a magnetic layer surface, which is measured by applying a tension of 0.2 N in a longitudinal direction of the magnetic tape, is in a range of 20 to 50 μm, and an AlFeSil abrasion value1.5 N on the magnetic layer surface measured by applying a tension of 1.5 N in the longitudinal direction of the magnetic tape is in a range of 20 to 50 μm.

公开(公告)号：US20220020392A1

公开(公告)日：2022-01-20

申请号：US17376164

申请日：2021-07-15

申请人： FUJIFILM Corporation

发明人： Takuto KUROKAWA ,  So MATSUYAMA ,  Norihito KASADA

IPC分类号： G11B5/706 ,  G11B5/735 ,  G11B5/714 ,  G11B5/592

摘要： The magnetic tape includes a non-magnetic support and a magnetic layer including a ferromagnetic powder, in which in an environment of a temperature of 32° C. and a relative humidity of 80%, a frictional force F0.2 N on a magnetic layer surface with respect to an LTO8 head, which is measured by applying a tension of 0.2 N in a longitudinal direction of the magnetic tape, is in a range of 4 to 15 gf, and a frictional force F1.5 N on the magnetic layer surface with respect to the LTO8 head, which is measured by applying a tension of 1.5 N in the longitudinal direction of the magnetic tape, is in a range of 4 to 15 gf.