公开(公告)号：US20140087212A1

公开(公告)日：2014-03-27

申请号：US14038318

申请日：2013-09-26

Applicant: FUJIFILM Corporation

Inventor： Takashi IMAI ,  Kazufumi OMURA

IPC: C09D7/12 ,  G11B5/733

CPC classification number: C09D7/63 ,  G11B5/73 ,  G11B5/733

Abstract: The carbon black composition includes carbon black and an amine compound denoted by formula (1) in a solvent: wherein, in formula (1), n denotes an integer falling within a range of 2 to 4, each of U, V, X, and Y independently denotes a substituent that comprises at least one carbon atom and binds, through the carbon atom, to a carbon atom to which the substituent substitutes, and each of W and Z independently denotes a hydrogen atom or a substituent.

Abstract translation: 炭黑组合物在溶剂中包括炭黑和由式（1）表示的胺化合物：其中，在式（1）中，n表示2〜4的整数，U，V，X， Y独立地表示包含至少一个碳原子并且通过碳原子与取代基所取代的碳原子结合的取代基，W和Z各自独立地表示氢原子或取代基。

公开(公告)号：US20240170012A1

公开(公告)日：2024-05-23

申请号：US18308088

申请日：2023-04-27

Applicant: FUJIFILM Corporation

Inventor： Takashi IMAI ,  Yuki FUKUOKA ,  Takashi MATSUI ,  Daisuke SAWAI

IPC: G11B5/65 ,  G11B5/008

CPC classification number: G11B5/653 ,  G11B5/00813

Abstract: The magnetic tape includes a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which, in a small-angle X-ray scattering spectrum obtained by small-angle X-ray scattering measurement of the non-magnetic support, in a region where a q-value is 0.01 to 0.10 Å−1, a ratio Imax/Imin of a scattering intensity Imax at a q-value qmax of a maximal value of a scattering intensity change rate to a scattering intensity Imin at a q-value qmin of a minimal value of the scattering intensity change rate is 2.7 or more, and qmin

公开(公告)号：US20230051998A1

公开(公告)日：2023-02-16

申请号：US17873867

申请日：2022-07-26

Applicant: FUJIFILM Corporation

Inventor： Takashi IMAI

IPC: G11B5/706 ,  G11B5/592 ,  G11B5/735

Abstract: The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. The non-magnetic support is a polyamide support, and a deformation rate ratio of a deformation rate in a width direction to a deformation rate in a longitudinal direction of the magnetic tape, (the deformation rate in the width direction/the deformation rate in the longitudinal direction), is 0.45 or less, the deformation rates each being measured after a load is applied in the longitudinal direction of the magnetic tape for 96 hours.

公开(公告)号：US20230290384A1

公开(公告)日：2023-09-14

申请号：US18166156

申请日：2023-02-08

Applicant: FUJIFILM Corporation

Inventor： Takashi IMAI ,  Kazutoshi KATAYAMA

IPC: G11B33/14

CPC classification number: G11B33/144

Abstract: A magnetic tape management device includes a processor. The processor acquires a temperature and humidity of an environment in which a magnetic tape is stored, derives a specific enthalpy using the temperature and the humidity, and performs management processing on the magnetic tape in accordance with the specific enthalpy.

公开(公告)号：US20230038353A1

公开(公告)日：2023-02-09

申请号：US17874800

申请日：2022-07-27

Applicant: FUJIFILM Corporation

Inventor： Takashi IMAI

IPC: G11B5/706 ,  G11B5/735 ,  G11B5/78

Abstract: The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. The non-magnetic support is a polyethylene naphthalate support, and a deformation rate ratio of a deformation rate in a width direction to a deformation rate in a longitudinal direction of the magnetic tape, (the deformation rate in the width direction/the deformation rate in the longitudinal direction), is 0.42 or less, the deformation rates each being measured after a load is applied in the longitudinal direction of the magnetic tape for 96 hours.

公开(公告)号：US20210366513A1

公开(公告)日：2021-11-25

申请号：US17394567

申请日：2021-08-05

Applicant: FUJIFILM Corporation

Inventor： Wataru KIKUCHI ,  Masatoshi YUMOTO ,  Takashi IMAI

IPC: G11B5/706 ,  G11B5/702 ,  G11B5/714 ,  G11B5/70

Abstract: The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer further includes a compound including a polyalkyleneimine chain and a vinyl polymer chain. The composition for a magnetic recording medium includes: ferromagnetic powder; and a compound including a polyalkyleneimine chain and a vinyl polymer chain.

公开(公告)号：US20190295585A1

公开(公告)日：2019-09-26

申请号：US16360758

申请日：2019-03-21

Applicant: FUJIFILM Corporation

Inventor： Wataru KIKUCHI ,  Masatoshi YUMOTO ,  Takashi IMAI

IPC: G11B5/706 ,  G11B5/702

Abstract: The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer further includes a compound including a polyalkyleneimine chain and a vinyl polymer chain. The composition for a magnetic recording medium includes: ferromagnetic powder; and a compound including a polyalkyleneimine chain and a vinyl polymer chain.

公开(公告)号：US20210056991A1

公开(公告)日：2021-02-25

申请号：US16995907

申请日：2020-08-18

Applicant: FUJIFILM Corporation

Inventor： Takashi IMAI ,  Kazutoshi KATAYAMA

IPC: G11B5/706 ,  G11B5/714 ,  G11B5/008 ,  G11B5/735 ,  G11B5/708

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a change amount of a loss tangent tan δ at a measurement temperature in a range of 50° C. to 100° C. before and after heating at 70° C. for 10 hours is 0.000 or more and 0.012 or less.