Fujifilm Corporation

Tokyo Ohka Kogyo Co., Ltd.

Fuji Xerox Co., Ltd.

Eastman-kodak Company

National Institute of Advanced Industrial Science and Technology

Kisoh Co., Ltd.

Takashi Fujimoto

Eiki Ozawa

Masashi Shirata

Toshiya Takagi

Kenji Naoi

Seiji Ohno

Norihito Kasada

Hidenori Miyamoto

Jiro Minabe

Akira Sakamoto

Takeshi Iwai

Akira Fujii

Yasuhiro Ogasawara

Jun Isozaki

Takahiro Senzaki

Chikaho Ikeda

Hideki Fukunaga

Yasushi Fujii

Shigetoshi Nakamura

Takashi Kamizono

Teiichi Suzuki

Toshiyuki Kanamori

Shinji Sugiura

Katsuyuki Ohta

Tadahiko Tabe

Kazumi Shin

Hirotsugu Kumazawa

Fumiki Yanagawa

Takao Mizoguchi

Emi Maeno

Norio Seki

Mamoru Hosoya

Tomohiro Maeda

Magnetic powder includes: an epsilon-phase iron oxide-based compound selected from ε-FeOor a compound represented by Formula (1). The magnetic powder has an average particle diameter of 8 nm to 25 nm, a ratio of Hc to Hc' of from 0.6 to 1.0, and Hc′ satisfying Expression (II). Hc′ represents a magnetic field at which a value of Expression (I) becomes zeroin a magnetic field-magnetization curve obtained by performing measurement at a maximum applied magnetic field of 359 kA/m, a temperature of 296 K, and a magnetic field sweeping speed of 1.994 kA/m/s. M represents magnetization and H represents applied magnetic field. Hc represents a magnetic field at which magnetization becomes zero in the magnetic field-magnetization curve. In Formula (1), A represents at least one metal element other than Fe, and a represents a number that satisfies a relationship of 0<a<2.dM/dH  Expression (I)119 kA/m<Hc′<2380 kA/m  Expression (II)ε-AFeO  (1)

Magnetic powder, manufacturing method of magnetic powder, and magnetic recording medium

Provided are a magnetic recording medium including a non-magnetic support, and a magnetic layer including a ferromagnetic powder. The ferromagnetic powder is an ε-iron oxide powder, and an intensity ratio (Int1/Int2) of diffraction intensities obtained by an X-ray diffraction analysis of the magnetic layer using an In-Plane method after the magnetic layer is pressed at a pressure of 70 atm is 1.0 or more and 6.5 or less, a magnetic tape cartridge and a magnetic recording and reproducing device each including the magnetic recording medium.

Magnetic recording medium having characterized magnetic layer, magnetic tape cartridge, and magnetic recording and reproducing device

A magnetic recording medium including a magnetic layer including a ferromagnetic powder. The ferromagnetic powder is an ε-iron oxide powder, and a ratio of Hr (45°) to Hr (0°) (Hr (45°)/Hr (0°)) is 0.50 or less. The Hr (0°) is a residual coercive force Hr obtained by applying a pulse magnetic field having a pulse width of 0.76 ms in an in-plane direction of the magnetic recording medium, and the Hr (45°) is a residual coercive force Hr obtained by setting an angle of the magnetic recording medium in the in-plane direction to 0°, setting an angle of the magnetic recording medium in a perpendicular direction to 90°, and making a pulse magnetic field having a pulse width of 0.76 ms be incident from a direction inclined by 45° toward the perpendicular direction from the in-plane direction and applying the pulse magnetic field to the magnetic recording medium.

Magnetic recording medium, magnetic tape cartridge, and magnetic recording and reproducing device

Provided are: a magnetic recording medium including a non-magnetic support and a magnetic layer containing a ferromagnetic powder, in which the ferromagnetic powder is an ε-iron oxide powder, a vertical squareness ratio SQ of the magnetic recording medium is 0.50 or more and 0.95 or less at a measurement temperature of 25° C., and an inclination of SQ obtained from SQ at a measurement temperature of 10° C., SQ at a measurement temperature of 25° C., and SQ at a measurement temperature of 40° C. is −0.0050° C.or more and −0.0003° C.or less; a magnetic tape cartridge including the magnetic recording medium which is a magnetic tape; and a magnetic recording and reproducing device including the magnetic recording medium.

Provided are: a magnetic recording medium including a non-magnetic support and a magnetic layer containing a ferromagnetic powder, in which the ferromagnetic powder is an ε-iron oxide powder, a vertical switching field distribution SFD of the magnetic recording medium is 0.20 or more and 3.00 or less at a measurement temperature of 25° C., and an inclination of SFD obtained from SFD at a measurement temperature of 10° C., SFD at a measurement temperature of 25° C., and SFD at a measurement temperature of 40° C. is 0.003° C.or more and 0.080° C.or less; a magnetic tape cartridge including the magnetic recording medium which is a magnetic tape; and a magnetic recording and reproducing device including the magnetic recording medium.

Magnetic recording medium having characterized vertical SFD, magnetic tape cartridge, and magnetic recording reproducing device

Provided are: a magnetic recording medium including a non-magnetic support and a magnetic layer containing a ferromagnetic powder, in which the ferromagnetic powder is an &#x3b5;-iron oxide powder, a vertical magnetization amount &#x3a6;m per unit area of the magnetic recording medium is 5 G&#xb7;&#x3bc;m or more and 100 G&#xb7;&#x3bc;m or less at a measurement temperature of 25&#xb0; C., and an inclination of &#x3a6;m obtained from &#x3a6;m at a measurement temperature of 10&#xb0; C., &#x3a6;m at a measurement temperature of 25&#xb0; C., and &#x3a6;m at a measurement temperature of 40&#xb0; C. is &#x2212;0.20 G&#xb7;&#x3bc;m/&#xb0; C. or more and &#x2212;0.03 G&#xb7;&#x3bc;m/&#xb0; C. or less; a magnetic tape cartridge including the magnetic recording medium which is a magnetic tape; and a magnetic recording and reproducing device including the magnetic recording medium.

Provided is a cladding composition which contains metal powder, a binder, and an organic solvent in a case of bonding a metal base material and a resin member to each other. Further, provided is a method for producing a metal/resin bonded member, including a step of coating at least a portion of a metal base material with the cladding composition; a step of irradiating the coated portion of the metal base material which has been coated with the cladding composition, with a laser; a step of disposing the resin member on the laser irradiation portion of the metal base material; and a step of heating an interface between the laser irradiation portion and the resin member so that the metal base material and the resin member are bonded to each other.

Cladding composition, and method for producing metal/resin bonded member

The magnetic tape includes a non-magnetic support and a magnetic layer including ferromagnetic powder, in which the ferromagnetic powder is &#x3b5;-iron oxide powder, and a coefficient of variation of particle size of the &#x3b5;-iron oxide powder in a longitudinal direction of the magnetic layer is 0.50% or more and 5.00% or less.

Magnetic tape having characterized coefficient of variation of e-iron oxide powder particle size, magnetic tape cartridge, and magnetic recording and reproducing apparatus

A core-shell particle includes: a core including an iron oxyhydroxide compound represented by Formula AFeOOH (in which Arepresents at least one metal element other than Fe, and a3 satisfies 0&#x3c;a3&#x3c;1) or at least one iron oxide compound selected from the group consisting of FeO, a compound represented by Formula AFeO(in which Arepresents at least one metal element other than Fe, and a1 satisfies 0&#x3c;a1&#x3c;2), FeO, and a compound represented by Formula AFeO(in which Arepresents at least one metal element other than Fe, and a2 satisfies 0&#x3c;a2&#x3c;2); and a shell which covers the core and includes a polycondensate of a metal alkoxide.

Core-shell particle and manufacturing method and fired product of the same, epsilon type iron oxide compound particle and manufacturing method of the same, and magnetic recording medium and manufacturing method of the same

Provided are a magnetic recording medium including: a non-magnetic support; and a magnetic layer which is provided on at least one surface of the non-magnetic support and includes particles of epsilon type iron oxide-based compound, and a binding agent, in which a contact angle measured regarding a surface of the magnetic layer is equal to or greater than 30.0&#xb0; and smaller than 45.0&#xb0; with respect to 1-bromonaphthalene and 80.0&#xb0; to 95.0&#xb0; with respect to water, a manufacturing method of particles of an epsilon iron oxide-based compound, and a manufacturing method of a magnetic recording medium.

Magnetic recording medium, manufacturing method of particles of epsilon type iron oxide-based compound, and manufacturing method of magnetic recording medium

Disclosed are a particle of a 13-iron oxyhydroxide-based compound represented by Formula (1), in which an average equivalent circle diameter of primary particles is 5 nm to 30 nm, and a coefficient of variation of equivalent circle diameters of the primary particles is 10% to 30% [In Formula (1), A represents at least one kind of metal element other than Fe, and a represents a number that satisfies a relationship of 0&#x2264;a&#x3c;1.], and applications thereof.&#x3b2;-AFeOOH &#x2003;&#x2003;(1)

Particles of &#x3b2;-iron oxyhydroxide-based compound, manufacturing method of the same, manufacturing method of particles of &#x3f5;-iron oxide-based compound, and manufacturing method of magnetic recording medium

Provided is a powder of a &#x3b2;-iron oxyhydroxide-based compound that is a group of particles of a &#x3b2;-iron oxyhydroxide-based compound represented by Formula (1) below; in which a surface of the particles of the &#x3b2;-iron oxyhydroxide-based compound is modified with a surface modifier; in which, in a case where the powder is dispersed in water to be made into a sol, a zeta potential of the powder is equal to or higher than +5 mV at pH 10; and&#x3b2;-AFeOOH&#x2003;&#x2003;(1)in which, in Formula (1), A represents at least one metallic element other than Fe, and a represents a number that satisfies a relationship of 0&#x2264;a&#x3c;1.

Powder of &#x3b2;-iron oxyhydroxide-based compound, &#x3b2;-iron oxyhydroxide-based compound sol, manufacturing method of powder of &#x3f5;-iron oxide-based compound, and manufacturing method of magnetic recording medium

Provided is an &#x3b5;-iron oxide type ferromagnetic powder with a powder pH within a range of 4.8 to 6.8; and a method for manufacturing the &#x3b5;-iron oxide type ferromagnetic powder and a composition containing at least the &#x3b5;-iron oxide type ferromagnetic powder and a solvent.

E-iron oxide type ferromagnetic powder, method for manufacturing same, and composition containing e-iron oxide type ferromagnetic powder

The invention provides a core-shell particle which can provide, by being calcinated, epsilon type iron oxide-based compound particles that have a small coefficient of variation of primary particle diameter and show excellent SNR and running durability when employed in a magnetic recording medium as well as applications thereof. The core-shell particle includes: a core including at least one iron oxide selected from FeOor FeO, or iron oxyhydroxide; and a shell that coats the core, the shell including a polycondensate of a metal alkoxide and a metal element other than iron, as well as applications thereof.

Core-shell particle, fired product of core-shell particle, manufacturing method of core-shell particle, epsilon type iron oxide-based compound particle, manufacturing method of epsilon type iron oxide-based compound particle, magnetic recording medium, and manufacturing method of magnetic recording medium

A method of producing a cell culture chip, in which a first adhesive is film-formed on a first substrate having transparency such that a first adhesive layer and a recessed portion on which one or more cell culture flow paths are formed face each other, and a second adhesive is film-formed on the first substrate such that a second adhesive layer and a flat portion around the recessed portion face each other, thereby obtaining a cell culture flow path substrate, the first adhesive containing a polyester-based resin having a glass transition temperature of 5&#xb0; C. or higher, and the second adhesive containing a polyester-based resin having a glass transition temperature of lower than 5&#xb0; C.

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Kanagawa, Japan

Takashi Fujimoto