Ricoh Company, Ltd.

Hitoshi Shimbo

Kunio Hayakawa

Shinya Kawahara

Satoshi Yamamoto

Yoshihiko Hotta

Hideo Suzaki

Takayuki Sasaki

Mitsunobu Morita

Shin Yamamoto

Tadafumi Tatewaki

Takehito Yamaguchi

Masaru Shimada

Kyoji Tsutsui

Masafumi Torii

Takeshi Shibuya

Yutaka Kuga

Hiromi Furuya

Jun Maruyama

Tomoyuki Kugo

Kyohji Okada

Kyohji Tsutsui

Provided is a heat-sensitive adhesive agent that mainly comprises a thermoplastic resin and a heat-meltable substance capable of melting upon heating, and further comprises swellable mica.

Heat-sensitive adhesive agent and heat-sensitive adhesive sheet

The present invention provides a reversible thermosensitive recording medium including: where 'n' is an integer of 23 or greater.

Reversible thermosensitive recording medium, reversible thermosensitive recording label, member, and image processing method

A heat-sensitive pressure-sensitive adhesive which contains at least a thermoplastic resin and a thermofusible material, wherein the thermoplastic resin has a glass transition temperature of &#x2212;70&#xb0; C. to &#x2212;30&#xb0; C., and the thermofusible material comprises triphenylphosphine, and at least any one of tris(2,4-di-t-butylphenyl)phosphite and tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate]methane, or a heat-sensitive pressure-sensitive adhesive which contains at least a thermoplastic resin, a thermofusible material and a non-thermofusible material, wherein the thermofusible material contains triphenylphosphine.

Heat-sensitive pressure-sensitive adhesive and heat-sensitive adhesive material

The reversible thermosensitive recording medium according to the present invention comprises a support, a thermosensitive layer and a protective layer in order, the thermosensitive layer comprises an electron-donating coloring compound and an electron-accepting compound and reversibly changes the color depending on temperatures, and the protective layer comprises a reactive heterocyclic compound, and inorganic fine particles of which surface is at least partially treated into hydrophobic, alternatively the protective layer comprises inorganic fine particles of which number-average particle size is 100 nm or less and of which surface is at least partially coated with organic silane compounds.

Reversible thermosensitive recording medium, label and member, and image processing apparatus and method

The present invention provides a reversible thermosensitive recording medium including a support and a thermosensitive recording layer thereon, in which the thermosensitive recording layer comprises an electron-donating coloring compound and an electron-accepting compound, and the thermosensitive recording layer is capable of forming a relatively developed condition and a relatively erased condition depending on at least one of the difference of heating temperatures and the difference of cooling rates following to heating, and in which the electron-accepting compound comprises a phenol compound represented by the General Formula (1): where, in the General Formula (1) 'l' represents an integer of 1 to 3, 'm' represents an integer of 1 or more, and &#x201c;n&#x201d; represents an integer of 7 or more.

Phenol compound, reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording member, image-processing apparatus and imaging-processing method

A reversible thermosensitive recording medium including a substrate, a reversible thermosensitive recording layer and an intermediate layer. The reversible thermosensitive recording layer is configured to reversibly record and erase an image therein and disposed overlying the substrate and includes a binder resin and a reversible thermosensitive coloring composition. The reversible thermosensitive coloring composition includes an electron donating coloring compound and an electron accepting compound. The intermediate layer includes another binder resin and a content of hollow particles having a hollow ratio not less than 70% and a ratio of a maximum particle diameter thereof to a 50% cumulative particle diameter of from 2.0 to 3.0. The reversible thermosensitive recording layer achieves a colored state when heated to a temperature not lower than a melting point thereof, and achieves a discolorization state when heated to a temperature lower than the melting point. The reversible thermosensitive recording layer has an erasable energy range width of at least 0.1 mJ/dot when using a thermal head.

Reversible thermosensitive recording medium, information storage material, reversible thermosensitive recording label, image processing method and image processing device

There is provided a reversible thermosensitive recording medium including a support, an intermediate layer, and a thermosensitive recording layer which reversibly changes a color thereof depending on a temperature, wherein the thermosensitive recording layer contains an electron-donating coloring compound, and an electron-accepting compound represented by the following general formula 1: where, n is an integer of 23 or more, and wherein the intermediate layer is disposed between the support and the thermosensitive recording layer, and contains hollow particles having a void ratio of 70% or more, a maximum diameter D100 of 5.0 &#x3bc;m to 10.0 &#x3bc;m, and a ratio D100/D50 of 2.0 to 3.0 where the ratio D100/D50 is a ratio of the maximum diameter D100 to a 50% cumulative particle diameter D50 of the hollow particles.

Reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording member, image-processing apparatus and image-processing method

A reversible thermosensitive recording medium including a substrate; and a reversible thermosensitive recording layer located on the substrate and reversibly achieving a relatively colored state and a relatively discolored state depending on the temperature to which the recording layer is heated or the cooling speed at which the recording layer is cooled after heating, wherein the reversible thermosensitive recording layer comprises a polyalkylene glycol compound having a number average molecular weight not less than 2,000 exclusive of polypropylene glycol having a number average molecular weight not greater than 5,000. A reversible thermosensitive recording device, and an image processing method and apparatus using the reversible thermosensitive recording medium are also be provided.

Reversible thermosensitive recording medium and device, and image processing method and apparatus using the reversible thermosensitive recording medium

Reversible thermosensitive recording medium, label and member, and, image processing apparatus and method

Light-permeable thermosensitive recording material

A transparent thermosensitive recording material capable of producing an image therein has a transparent support and a thermosensitive recording layer formed thereon, the recording layer containing a colorless or light-colored leuco dye, a color developer capable of inducing coloring formation in the leuco dye, and a binder resin. The image obtained in the recording material exhibits an absorbance of 3.0 or more at 610 nm when the image has a maximum transmission density, and the ratio of the absorbance at 700 nm to the absorbance at 610 nm is in a range of 0.1 to 0.3 within the region from a transmission density of the image of 1.0 to the maximum transmission density thereof.

Transparent thermosensitive recording material

A transparent thermosensitive recording material has a transparent support and a thermosensitive recording layer formed thereon, with a non-image area of the transparent thermosensitive recording material exhibiting an absorbance in a range from 0.5 to 1.2 when irradiated with light with a wavelength of 380 nm, and an absorbance of 0.7 or less when irradiated with light with a wavelength of 420 nm.

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Shizuoka, Japan

Hitoshi Shimbo