Canon Kabushiki Kaisha

Asao, Masaya

Masaya Asao

Soichiro Kawakami

Naoya Kobayashi

Shinya Mishina

Takao Ogura

Hiroshi Asakawa

Takatoshi Tanaka

Takeshi Ota

Olivia Herlambang

Hitoshi Nagashima

Takeshi Kosuzu

Akira Nagashima

Hitoshi Yoshino

Sadayuki Sugama

Yasuhiro Yamada

Nobuyuki Suzuki

Yoshiyuki Nagase

Hidetoshi Tsuzuki

Kenji Nakajima

Yuji Kondo

Arika Tanaka

Hironao Kimura

Takeshi Tsurusaki

Tatsuo Senba

Naoya Kabayashi

An ink let recording medium includes a substrate and an ink-receiving layer as the uppermost surface layer, with the ink-receiving layer containing inorganic particles mainly including alumina particles, and a binder mainly containing a water-insoluble resin, wherein the content of the inorganic particles is 50% by mass or more relative to the total mass of the ink-receiving layer and the surface roughness (Ra) of the ink-receiving layer measured with a scanning probe microscope is in the range of 30 nm to 150 nm.

Ink jet recording medium and image recording method

A recording method includes an ink application process of applying ink to a record medium and a cover layer formation process of forming a cover layer by applying a liquid composition containing polyurethane resin particles to the record medium to which the ink is applied in such a manner as to be at least partially overlapped with a region to which the ink is applied, in which the breaking strength of the cover layer is 0.1 N or more and the breaking elongation of the cover layer is 200% or more.

Recording method, recorded matter, recorded matter processing method, and method for improving fold-crack resistance of recorded matter

A recording medium including a substrate and an ink-receiving layer provided on the substrate. The ink-receiving layer contains a silica particle and a water-insoluble resin. The silica particle satisfies the following expressions 1 and 2 when the average pore radius thereof determined by the BJH method is taken as r (nm), and the oil absorption thereof measured by the linseed oil droplet method is taken as V (ml/100 g):&#x2264;5.0 (nm)&#x2003;&#x2003;expression 1:&#x2265;80 ((ml/100 g)/nm).&#x2003;&#x2003;expression 2:

Recording medium

A recording medium including a substrate and an ink-receiving layer. The ink-receiving layer contains an inorganic particle, a water-insoluble resin and at least one additive selected from the group consisting of a benzotriazole ultraviolet absorber and a hindered amine photostabilizer. The average pore radius of the inorganic particle is 5.0 nm or less.

Recording medium and production process thereof

A recording medium including a substrate and an ink-receiving layer. The ink-receiving layer contains an inorganic particle, a binder and at least one surfactant. The binder contains at least one resin selected from the group consisting of an acrylic resin, a polycarbonate-modified urethane resin and a polyether-modified urethane resin. The at least one surfactant comprises an acetylene-based surfactant. The contact angle of water to a surface of the ink-receiving layer at 60 seconds after contact of the water with the surface of the ink-receiving layer is 40 degrees or more to 80 degrees or less.

There is provided a recording medium including a substrate and an ink-receiving layer formed on at least one surface of the substrate, wherein the ink-receiving layer contains an inorganic pigment, a binder, and a compound containing aluminum, silicon, and at least one element selected from Group 2 and 3 elements of the periodic table, and the compound content is in the range of 0.1 mass % to 30 mass % relative to the inorganic pigment content.

Provided is a recording medium including an ink-receiving layer containing an inorganic pigment and a binder on at least one surface of a substrate. The ink-receiving layer contains a compound including zirconium, silicon, and at least one element selected from Group 2 and Group 3 elements of the periodic table.

A recording medium includes an ink-receiving layer formed by applying a coating liquid onto at least one surface of a substrate and drying the coating liquid, the coating liquid containing hydrated alumina and a binder, in which the hydrated alumina in the coating liquid has an average particle size of 100 nm to 250 nm, the surface of the ink-receiving layer has an arithmetic average roughness Ra of 0.8 &#x3bc;m to 2.5 &#x3bc;m, the arithmetic average roughness Ra being specified by JIS B0601:2001, and the surface of the ink-receiving layer has a specular gloss at 60&#xb0; of 10.0% or less, the specular gloss at 60&#xb0; being specified by JIS Z8741.

The invention provides a recording medium capable of inhibiting conspicuousness of scratches attached to the recording medium and preventing the occurrence of density unevenness in an image. The recording medium has a substrate and an ink receiving layer provided on the substrate, wherein substrate is a resin-coated substrate obtained by coating a base material with a resin, and wherein Ra2 is 0.3 &#x3bc;m or more and 2.5 &#x3bc;m or less and Ra1&#x2212;Ra2 is 2.0 &#x3bc;m or more, where Ra1 is an arithmetic average roughness of a surface of the substrate son the side of the ink receiving layer as prescribed by JIS B 0601:2001 and Ra2 is an arithmetic average roughness of the outermost surface of the recording medium as prescribed by JIS B 0601:2001.

A recording medium includes a substrate and at least two ink receiving layers formed on the substrate. In the recording medium, an uppermost ink receiving layer of the at least two ink receiving layers has a dry coated amount of 5 g/mor more and 20 g/mor less and contains hydrated alumina which a divalent metal compound adheres to. The ratio of an element content of the divalent metal to an element content of aluminum (element content of divalent metal/element content of aluminum) in the uppermost ink receiving layer is 0.001 or more and 0.03 or less.

The invention relates to a surface-modified inorganic pigment which has an inorganic pigment having acid function and an amorphous body located on the surface of the inorganic pigment having acid function and formed by at least a divalent or higher-valent metal and an anion component in a state where the inorganic pigment and the amorphous body do not chemically bond to each other, and which does not exhibit acid function.

Surface-modified inorganic pigment, colored surface-modified inorganic pigment, recording medium and production processes thereof, and image forming method and recorded image

The invention provides a recording medium capable of inhibiting occurrence of undertrapping, lowering the visibility of scratches on the outermost surface of the recording medium and inhibiting occurrence of a mottled pattern when recording is conducted. The recording medium has a substrate and an ink receiving layer provided on the substrate, wherein the arithmetic average roughness Ra of the outermost surface of the recording medium as prescribed by JIS B 0601:2001 is 1.1 &#x3bc;m or more and 2.5 &#x3bc;m or less, and the skewness Rsk of a roughness curve of the outermost surface of the recording medium as prescribed by JIS B 0601:2001 is 0.1 or less.

The invention provides a recording medium capable of inhibiting cracks and also inhibiting peeling off of an ink receiving layer upon folding of the recording medium. The recording medium has a substrate and an ink receiving layer provided on the substrate, wherein the substrate is a resin-coated substrate obtained by coating a base material with a resin, the arithmetic average roughness Ra of a surface of the substrate on the side of the ink receiving layer as prescribed by JIS B 0601:2001 is 3.0 &#x3bc;m or more, the skewness Rsk of a roughness curve of the surface of the substrate as prescribed by JIS B 0601:2001 is 0.2 or less, and the coating thickness of the ink receiving layer is 50 &#x3bc;m or less.

The present invention relates to a pigment dispersion having an inorganic pigment dispersed therein, characterized in that a metal compound adheres to the inorganic pigment and a metal ion concentration of the metal compound in the pigment dispersion does not exceed 0.05 mol/L.

Pigment dispersion and inkjet recording medium using the same

An electrode material for a rechargeable lithium battery, characterized in that said electrode material comprises a fine powder of a silicon-based material whose principal component is silicon element, said fine powder having an average particle size (R) in a range of 0.1 &#x3bc;m&#x2266;R&#x3c;0.5 &#x3bc;m. An electrode structural body for a rechargeable lithium battery, having an electrode material layer comprising said silicon-based material fine powder. A rechargeable lithium battery whose anode comprising said electrode structural body.

Electrode material for rechargeable lithium battery, electrode structural body comprising said electrode material, rechargeable lithium battery having said electrode structural body, process for the production of said electrode structural body, and process for the production of said rechargeable lithium battery

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Yokohama, Japan

Masaya Asao