Having Nonreactant Particles Of Defined Size Patents (Class 503/207)
  • Patent number: 10300726
    Abstract: The present invention provides a heat-sensitive recording body that is excellent in high-speed recording properties, that makes it possible to perform high-quality image recording with a high sensitivity even at a low thermal energy, and that is excellent in printability and economy.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: May 28, 2019
    Assignee: SAIDEN CHEMICAL INDUSTRY CO., LTD.
    Inventors: Daichi Terada, Koichi Watanabe, Shuichi Kanedai, Kenji Kijima, Junpei Kozuka
  • Patent number: 10180413
    Abstract: The present invention provides an ink composition for forming a color-changing layer that changes color by plasma treatment, the ink composition exhibiting excellent heat resistance, with the gasification of the color-changing layer or the scattering of the fine debris of the color-changing layer caused by plasma treatment being suppressed to the extent that electronic device properties are not affected. The invention provides an ink composition for forming a color-changing layer that changes color by plasma treatment, the ink composition comprising metal oxide particles containing at least one element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi, and a binder resin.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: January 15, 2019
    Assignee: SAKURA COLOR PRODUCTS CORPORATION
    Inventors: Keita Hishikawa, Kazuhiro Uneyama
  • Patent number: 10022995
    Abstract: The present invention relates to a thermally printable paper article with an elastomeric underlayer, which imparts improved printing performance.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: July 17, 2018
    Assignees: Rohm and Haas Company, Dow Global Technologies LLC
    Inventors: Andrew Hejl, Lanfang Li, Rebecca Smith, Jian Yang
  • Patent number: 9932487
    Abstract: The present invention relates to a thermosensitive recording material comprising paper, an undercoat layer disposed on the paper, and a thermosensitive recording layer disposed on the undercoat layer, wherein the undercoat layer comprises a binder and first and second hollow sphere polymer particles, wherein the first hollow sphere polymer particles have a diameter in the range of from 1.2 ?m to 1.8 ?m; the second hollow sphere polymer particles have a diameter in the range of from 0.25 ?m to 1.0 ?m; the number ratio of the second to the first hollow sphere polymer particles is in the range of from 1:1 to 20:1; the diameter of the second hollow sphere polymer particles is in the range of from 15 to 65% of the diameter of the first hollow sphere polymer particles; the dry bulk density of the first hollow sphere polymer particles is in the range of 0.25 to 0.5 g/mL; and the dry bulk density of the second hollow sphere polymer particles is in the range of 0.30 to 0.90 g/mL.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: April 3, 2018
    Assignees: Rohm and Haas Company, Dow Global Technologies LLC
    Inventors: Brian R. Einsla, Valeriy V. Ginzburg, Lanfang Li, John A. Roper, III, Rebecca Smith, Jian Yang
  • Patent number: 9197770
    Abstract: A method and apparatus for performing an image forming job by maintaining a cover, which covers a scan area and has adjustable transparency, in a transparent state until a job for acquiring image data of a scan object starts in an image forming apparatus. If the job for acquiring the image data of the scan object positioned in the scan area starts, the image forming apparatus converts the cover into an opaque state and acquires the image data of the scan object. If the job for acquiring the image data of the scan object is ended, the image forming apparatus reconverts the cover into a transparent state. Therefore, efficiency of a job for acquiring image data of a scan object is improved.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: November 24, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-jin Kim, An-na Park, Da-hye Park
  • Patent number: 8877680
    Abstract: A reversible thermosensitive recording medium including a support, a reversible thermosensitive recording layer provided on the support and an antistatic layer, wherein the antistatic layer is provided on at least one of the reversible thermosensitive recording layer and a surface of the support opposite to the surface thereof on which the reversible thermosensitive recording layer is provided, wherein the antistatic layer contains spherical fillers and a curable conductive polymer, and wherein the spherical fillers satisfy the following Expression (1): 4?average particle diameter of the spherical fillers/thickness of the antistatic layer?6??Expression (1).
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: November 4, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tadafumi Tatewaki, Koji Yamaguchi
  • Patent number: 8637431
    Abstract: A heat-sensitive recording material having a substrate that carries on its first side at least one heat-sensitive recording layer having at least one dye precursor and at least one color acceptor. The dye precursor and color acceptor react with one another in a color-forming manner under the action of heat. On its second side the substrate has a backcoat containing calcium carbonate. The backcoat is formed of at least two layers, a first layer is applied closer to the substrate and a second layer is applied farther from the substrate. The first layer contains a first calcium carbonate and the second layer contains a second calcium carbonate that differs from the first calcium carbonate.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: January 28, 2014
    Assignee: Mitsubishi HiTec Paper Europe GmbH
    Inventors: Gerhard Stork, Karsten Lerius
  • Patent number: 8629082
    Abstract: The present invention provides a heat-sensitive recording material that suffers no defective coating and is superior in color-exhibiting sensitivity, image quality, and chemical resistance. The heat-sensitive recording material successively comprising, on a support, an undercoat layer, a heat-sensitive recording layer containing a leuco dye and a developer, and a protective layer, wherein the heat-sensitive recording layer contains, as a main pigment, kaolin having an average particle diameter of 0.1 to 0.4 ?m measured by a sedimentation method in an amount of 4 to 60 mass % based on a total solids content of the heat-sensitive recording layer, and wherein the heat-sensitive recording layer and the protective layer are formed by applying a heat-sensitive recording layer coating composition and a protective layer coating composition by a simultaneous multilayer curtain coating method, and drying resulting coatings.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: January 14, 2014
    Assignee: OJI Holdings Corporation
    Inventors: Shin-ichi Doi, Masahiro Morie, Kenji Muto, Toshizo Yamamoto
  • Publication number: 20140005046
    Abstract: Provided is a thermal recording material that is excellent in water resistance and prevention of print head wear, less prone to discoloration in the non-printing area, and stably producible. The thermal recording material comprises a protective layer formed by applying a coating liquid for forming the protective layer, the coating liquid being prepared by mixing an acetoacetyl-modified polyvinyl alcohol and calcium glyoxylate particles with a maximum diameter less than 500 ?m and an average diameter of 125 ?m or less.
    Type: Application
    Filed: February 14, 2012
    Publication date: January 2, 2014
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Shinichiro Matsumoto
  • Patent number: 8598074
    Abstract: To provide a thermosensitive recording medium including: a support; an image recording layer on the support; and an inorganic material in particle form as a light-heat conversion material, wherein the inorganic material has a ratio of Y to X, represented by Y/X, of 2 or greater, where X denotes an average value of absorption intensities with respect to light having wavelengths in the range of 400 nm to 700 nm, and Y denotes a maximum value among absorption intensities with respect to light having wavelengths greater than 700 nm but smaller than or equal to 1,200 nm.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 3, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Kawahara, Tomomi Ishimi, Toshiaki Asai, Yoshihiko Hotta
  • Patent number: 8592341
    Abstract: A reversible thermosensitive recording medium including: a support; a reversible thermosensitive recording layer on the support; and a protective layer on the reversible thermosensitive recording layer, wherein the reversible thermosensitive recording layer contains an electron-donating color-forming compound and an electron-accepting compound, wherein the protective layer contains a polyester acrylate resin, and wherein the protective layer has a glass transition temperature of 230° C. or higher and has an elongation of 10% or higher.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: November 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yu Tsuchimura, Satoshi Arai, Jun Maruyama
  • Patent number: 8546300
    Abstract: A thermosensitive recording material including: a support; an undercoat layer containing at least a water-soluble resin; a thermosensitive coloring layer containing a leuco dye and a developer; and a protective layer containing a water-soluble resin and a fluorescent whitening agent, wherein the undercoat layer, the thermosensitive coloring layer, and the protective layer are formed in this order over the support, wherein the undercoat layer has a single layer structure or a multilayer structure, and the protective layer has a single layer structure or a multilayer structure, and wherein the undercoat layer has an air permeance of 150 mL/min or less.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: October 1, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Kazuhiro Uchimura
  • Patent number: 8536087
    Abstract: A thermographic substrate assembly comprised of a colorant and a flexible substrate. This assembly also contains a thermosensitive layer, and the thermosensitive layer contains a binder, a multiplicity of hollow sphere organic pigments, and a thermal solvent.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: September 17, 2013
    Assignee: International Imaging Materials, Inc.
    Inventors: Daniel Jude Harrison, Barry L. Marginean, John Przybylo, Kathleen Lindstrom, Natalie Soldwisch
  • Patent number: 8530377
    Abstract: The present invention provides a thermoreversible recording medium which includes a support, a thermoreversible recording layer which comprises a thermoreversible composition containing an electron-donating color-forming compound and an electron-accepting compound, a metal compound-containing layer which includes a resin, an organic metal compound, and an inorganic layer compound, in which the resin is at least one selected from the group consisting of polyvinyl alcohol polymers, and ethylene-vinyl alcohol copolymers, and the organic metal compound is at least one selected from the group consisting of an organic titanium compound and an organic zirconium compound, and a protective layer which protects the metal compound-containing layer, wherein the support, the thermoreversible recording layer, the metal compound-containing layer and the protective layer are laminated in this order.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: September 10, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yu Tsuchimura, Satoshi Arai, Jun Maruyama, Yutaka Matsuoka
  • Patent number: 8476190
    Abstract: In the present invention a composite particle including: a first polymeric particle having a diameter of from 100 nm to 3.5 microns including a core and a shell: the core including, when dry, at least one void; and the shell polymer having a calculated glass transition temperature (“Tg”) greater than 50° C.; and a second polymeric particle disposed on the surface of the first polymeric particle, the second polymeric particle having a minimum film-forming temperature of greater than 20° C.; wherein the ratio of the diameter of the first polymeric particle to the diameter of the second polymeric particle is from 1 to 50; and wherein the ratio of the weight of the first polymeric particle to the weight of the second polymeric particle is from 0.1 to 40, is provided.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: July 2, 2013
    Assignee: Rohm and Haas Company
    Inventors: Ravi Mukkamala, Chao-Jen Chung
  • Patent number: 8470735
    Abstract: Provided are a coating solution for a thermosensitive color developing layer of excellent storability wherein color development during its storage or during producing a thermal recording material is suppressed, and a thermal recording material with excellent print portion (image portion) storability and suppressed staining in the background color (white background). A coating solution for a thermosensitive color developing layer, which comprises a colorless or pale-colored electron-donating leuco dye, a hindered phenol compound and, as an electron-accepting developer, a diphenylsulfone derivative represented by the following formula (1): wherein the aforementioned hindered phenol compound has an average particle size (D50) of not more than 0.5 ?m, and the coating solution has a color tone a* of not less than ?4.0 as measured according to JIS Z 8729 and a whiteness W of not less than 62 as measured according to JIS Z 8715.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: June 25, 2013
    Assignees: Nippon Paper Industries Co., Ltd., API Corporation
    Inventors: Yoshimune Aosaki, Mai Kaneko, Katsuto Ohse, Yukiko Sato
  • Patent number: 8415270
    Abstract: A heat-sensitive recording material comprises a support, a heat-sensitive recording layer including a leuco dye and a developer, and a protective layer comprising a pigment and a binder. The heat-sensitive recording layer is located between the support and the protective layer. The pigment in the protective layer comprises secondary particles with an average particle diameter of about 30 to 900 nm formed preferably by aggregation of amorphous silica primary particles with a particle diameter of about 3 to 70 nm. The secondary particles are present in a proportion of about 5 to 35 mass % relative to total solids of the protective layer. The colloidal silica is present in a proportion of about 1 to 25 mass % relative to total solids of the protective layer.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: April 9, 2013
    Assignee: Kanzaki Specialty Papers
    Inventors: Hidenori Yada, Shigetoshi Seki
  • Patent number: 8367581
    Abstract: To provide a thermosensitive recording medium including: a support; a thermosensitive recording layer composed mainly of a leuco dye and a developer, formed on a surface of the support; and at least two antibacterial agents which include a zirconium phosphate antibacterial agent and an imidazole antibacterial agent and which are internally contained in the thermosensitive recording medium.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: February 5, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Tohru Kitano
  • Patent number: 8354359
    Abstract: 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.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: January 15, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Mitsunobu Morita, Takehito Yamaguchi, Takayuki Sasaki, Hitoshi Shimbo, Yutaka Kuga
  • Patent number: 8349766
    Abstract: A thermosensitive recording material including, on a support having a type D durometer hardness of 40 or more as defined in accordance with ISO 7619:2004, and sequentially from the support side, an undercoating layer having a dynamic microhardness at 25° C. of 5.0 mN or less; and a thermosensitive color-forming layer containing an electron-donating dye precursor and an electron-accepting compound for thermal color-formation of the electron-donating dye precursor.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: January 8, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Kunihiko Ohga
  • Publication number: 20120277098
    Abstract: In the present invention a composite particle including: a first polymeric particle having a diameter of from 100 nm to 3.5 microns including a core and a shell: the core including, when dry, at least one void; and the shell polymer having a calculated glass transition temperature (“Tg”) greater than 50° C.; and a second polymeric particle disposed on the surface of the first polymeric particle, the second polymeric particle having a minimum film-forming temperature of greater than 20° C.; wherein the ratio of the diameter of the first polymeric particle to the diameter of the second polymeric particle is from 1 to 50; and wherein the ratio of the weight of the first polymeric particle to the weight of the second polymeric particle is from 0.1 to 40, is provided.
    Type: Application
    Filed: April 10, 2012
    Publication date: November 1, 2012
    Inventors: Ravi MUKKAMALA, Chao-Jen CHUNG
  • Patent number: 8288313
    Abstract: A thermal recording material comprises a support and a thermal recording layer formed thereon, the thermal recording layer containing an electron-donating dye precursor and an electron-receiving developer that causes said dye precursor to develop a color, wherein said thermal recording layer contains vapor-phase synthesis silica, preferably, the vapor-phase synthesis silica has a specific surface area, measured by a BET method, of 50 to 200 m2/g and further is doped with aluminum oxide, and the thermal recording layer further contains the above vapor-phase synthesis silica and a diphenyl sulfones-bridged type compound, and the thermal recording material is excellent in anti-sticking property and image stability.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: October 16, 2012
    Assignee: Mitsubishi Paper Mills Limited
    Inventor: Yoshimi Ikezawa
  • Patent number: 8283285
    Abstract: Disclosed are a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein a solid particle component contained therein has an average particle diameter of 0.3 to 25 ?m, a scratch color-developable ink comprising an electron-donating colorless or light-color dye precursor, an electron-accepting color developer and a varnish, wherein an azaphthalide compound is contained as the electron-donating colorless or light-color dye precursor, and an invisible information printed sheet obtained by printing invisible information on a support with the above scratch color-developable ink.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: October 9, 2012
    Assignees: Mitsubishi Paper Mills Limited, Tokyo Printing Ink Mfg. Co., Ltd.
    Inventors: Hisashi Wakasugi, Fujio Takasaki, Kazuhiro Handa, Masahiro Miyauchi, Haruhiko Ikeda
  • Publication number: 20120238446
    Abstract: A reversible thermosensitive recording medium including: a support; a reversible thermosensitive recording layer on the support; and a protective layer on the reversible thermosensitive recording layer, wherein the reversible thermosensitive recording layer contains an electron-donating color-forming compound and an electron-accepting compound, wherein the protective layer contains a polyester acrylate resin, and wherein the protective layer has a glass transition temperature of 230° C. or higher and has an elongation of 10% or higher.
    Type: Application
    Filed: March 15, 2012
    Publication date: September 20, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yu TSUCHIMURA, Satoshi Arai, Jun Maruyama
  • Patent number: 8247347
    Abstract: The present invention presents a thermosensitive recording medium having excellent color development, image quality and preservation properties as well as excellent stamp receptivity, anti-scratching ability, printability and water blocking resistance. The present invention is a thermosensitive recording medium having a thermosensitive recording layer comprising at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains rice starch particles.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: August 21, 2012
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Ken Takagi, Jun Makihara, Akihito Ogino, Kenji Hirai, Makoto Hasegawa, Shin Suzuki, Takeshi Hirose
  • Publication number: 20120202686
    Abstract: The present invention provides a heat-sensitive recording material that suffers no defective coating and is superior in color-exhibiting sensitivity, image quality, and chemical resistance. The heat-sensitive recording material successively comprising, on a support, an undercoat layer, a heat-sensitive recording layer containing a leuco dye and a developer, and a protective layer, wherein the heat-sensitive recording layer contains, as a main pigment, kaolin having an average particle diameter of 0.1 to 0.4 ?m measured by a sedimentation method in an amount of 4 to 60 mass % based on a total solids content of the heat-sensitive recording layer, and wherein the heat-sensitive recording layer and the protective layer are formed by applying a heat-sensitive recording layer coating composition and a protective layer coating composition by a simultaneous multilayer curtain coating method, and drying resulting coatings.
    Type: Application
    Filed: October 8, 2010
    Publication date: August 9, 2012
    Applicant: OJI PAPER CO., LTD.
    Inventors: Shin-ichi Doi, Masahiro Morie, Kenji Muto, Toshizo Yamamoto
  • Patent number: 8129307
    Abstract: The present invention provides a thermosensitive recording medium, which is excellent in stamping ability, anti-scratching ability, and water and plasticizer resistance of image area as well as in recording sensitivity, image quality and storage stability. The present invention is a thermosensitive recording medium having a thermosensitive recording layer containing at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains powdered cellulose, wherein the powdered cellulose is prepared by a dry grinding process at ambient temperature.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: March 6, 2012
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Jun Makihara, Akihito Ogino
  • Patent number: 8101546
    Abstract: In the present invention, a dispersion that has excellent dispersion efficiency, shows hardly any premature graying, and exhibits excellent dispersion stability and storage stability when heated is prepared, and the thermal recording material excellent in color developing sensitivity and whiteness of the background is provided. The present invention provides a thermal recording material including a support and a thermosensitive coloring layer that is provided on the support and contains an electron-donating colorless dye and an electron-accepting compound, wherein the thermosensitive coloring layer contains a polyvinyl alcohol-based resin (A) containing a carboxyl group that has been produced by saponification of polyvinyl ester obtained by the polymerization in the presence of aldehydes or ketones and that has an absorbance at 280 nm of 0.20 to 0.85 obtained from an ultraviolet absorption spectrum of a 0.1 wt % aqueous solution thereof.
    Type: Grant
    Filed: May 29, 2006
    Date of Patent: January 24, 2012
    Assignee: Kuraray Co., Ltd.
    Inventor: Atsushi Jikihara
  • Patent number: 8039419
    Abstract: The invention provides a heat sensitive recording material comprising heat sensitive recording layer provided on a support and having a hollow particle and a heat sensitive coloring component.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: October 18, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Kunihiko Ohga
  • Publication number: 20110251060
    Abstract: A thermographic substrate assembly comprised of a colorant and a flexible substrate. This assembly also contains a thermosensitive layer, and the thermosensitive layer contains a binder, a multiplicity of hollow sphere organic pigments, and a thermal solvent.
    Type: Application
    Filed: April 5, 2011
    Publication date: October 13, 2011
    Applicant: International Imaging Materials, Inc.
    Inventors: Daniel Jude Harrison, Barry Marginean, Kathleen Lindstrom, Natalie Soldwisch, John Przybylo
  • Patent number: 7935656
    Abstract: The present teachings provide thermosensitive recording compositions which are useful for preparing thermosensitive recording media for displaying images. The thermosensitive recording media can include a substrate, a thermosensitive recording composition, and a topcoat. Methods of preparing and using the thermosensitive recording media also are disclosed.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: May 3, 2011
    Assignee: Nashua Corporation
    Inventors: Mohamed A. Elmasry, William M. Sawyer
  • Publication number: 20110092365
    Abstract: A thermosensitive recording material including, on a support having a type D durometer hardness of 40 or more as defined in accordance with ISO 7619:2004, and sequentially from the support side, an undercoating layer having a dynamic microhardness at 25° C. of 5.0 mN or less; and a thermosensitive color-forming layer containing an electron-donating dye precursor and an electron-accepting compound for thermal color-formation of the electron-donating dye precursor.
    Type: Application
    Filed: October 15, 2010
    Publication date: April 21, 2011
    Applicant: FUJIFILM CORPORATION
    Inventor: Kunihiko OHGA
  • Publication number: 20100190644
    Abstract: A heat-sensitive recording material comprises a support, a heat-sensitive recording layer including a leuco dye and a developer, and a protective layer comprising a pigment and a binder. The heat-sensitive recording layer is located between the support and the protective layer. The pigment in the protective layer comprises secondary particles with an average particle diameter of about 30 to 900 nm formed preferably by aggregation of amorphous silica primary particles with a particle diameter of about 3 to 70 nm. The secondary particles are present in a proportion of about 5 to 35 mass % relative to total solids of the protective layer. The colloidal silica is present in a proportion of about 1 to 25 mass % relative to total solids of the protective layer.
    Type: Application
    Filed: January 27, 2010
    Publication date: July 29, 2010
    Inventors: Hidenori Yada, Shigetoshi Seki
  • Patent number: 7709416
    Abstract: The present invention provides a heat-sensitive recording material that comprises a support, a heat-sensitive recording layer comprising a leuco dye and a developer, and a protective layer principally comprising a pigment and a binder. The support, the heat-sensitive recording layer, and the protective layer are provided in this order. The protective layer comprises: (1) a pigment of secondary particles with an average particle diameter of 30 to 900 nm formed by aggregation of amorphous silica primary particles with a particle diameter of 3 to 70 nm; or (2) a pigment of secondary particles with an average particle diameter of 30 to 900 nm formed by aggregation of amorphous silica primary particles with a particle diameter of 3 to 70 nm, and a binder comprising acetoacetyl modified polyvinyl alcohol with a saponification degree of 90 to 100 mol % and a polymerization degree of 1900 to 5000.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: May 4, 2010
    Assignee: OJI Paper Co., Ltd.
    Inventors: Takeshi Iida, Takeshi Shikano
  • Publication number: 20100099557
    Abstract: The present invention provides a thermosensitive recording medium, which is excellent in stamping ability, anti-scratching ability, and water and plasticizer resistance of image area as well as in recording sensitivity, image quality and storage stability. The present invention is a thermosensitive recording medium having a thermosensitive recording layer containing at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains powdered cellulose, wherein the powdered cellulose is prepared by a dry grinding process at ambient temperature.
    Type: Application
    Filed: January 25, 2008
    Publication date: April 22, 2010
    Inventors: Jun Makihara, Akihito Ogino
  • Publication number: 20100069240
    Abstract: A thermal recording material comprises a support and a thermal recording layer formed thereon, the thermal recording layer containing an electron-donating dye precursor and an electron-receiving developer that causes said dye precursor to develop a color, wherein said thermal recording layer contains vapor-phase synthesis silica, preferably, the vapor-phase synthesis silica has a specific surface area, measured by a BET method, of 50 to 200 m2/g and further is doped with aluminum oxide, and the thermal recording layer further contains the above vapor-phase synthesis silica and a diphenyl sulfones-bridged type compound, and the thermal recording material is excellent in anti-sticking property and image stability.
    Type: Application
    Filed: February 13, 2008
    Publication date: March 18, 2010
    Inventor: Yoshimi Ikezawa
  • Publication number: 20100062935
    Abstract: The present invention presents a thermosensitive recording medium having excellent color development, image quality and preservation properties as well as excellent stamp receptivity, anti-scratching ability, printability and water blocking resistance. The present invention is a thermosensitive recording medium having a thermosensitive recording layer comprising at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains rice starch particles.
    Type: Application
    Filed: March 14, 2008
    Publication date: March 11, 2010
    Inventors: Ken Takagi, Jun Makihara, Akihito Ogino, Kenji Hirai, Makoto Hasegawa, Shin Suzuki, Takeshi Hirose
  • Publication number: 20100048394
    Abstract: A description is given of a heat-sensitive recording material comprising: a sheetlike carrier; a thermoreactive layer on at least one side of the sheetlike carrier; and an interlayer, formed between the sheetlike carrier and the respective thermoreactive layer, which comprises hollow-sphere pigments embedded in a binder; and also, if appropriate, comprising top layers and/or further layers. This recording material is characterized in that the hollow-sphere pigments take the form of a composite pigment, with nanoscale pigment particles attached to the surface of an organic hollow-sphere pigment. This material can be produced inexpensively at high operating speed. The interlayers that are proposed in accordance with the invention exhibit optimum insulation capacity. They also have the effect of reducing or preventing the unwanted phenomenon of the text showing through, particularly when the thermoreactive layers are formed on both sides of the sheetlike carrier.
    Type: Application
    Filed: June 29, 2007
    Publication date: February 25, 2010
    Applicant: PAPIERFABRIK AUGUST KOEHLER AG
    Inventors: Michael Horn, Uwe Brasch
  • Patent number: 7651975
    Abstract: The present invention is a thermally sensitive recording medium containing a thermally sensitive color developing layer containing a colorless or pale colored basic leuco dye and a color-developing agent as the main components on a substrate, wherein the thermally sensitive recording layer contains an acrylic polymer obtained by the copolymerization of an alkyl acrylate, alkyl methacrylate and vinylsilane as monomer components and a colloidal. Further, the present invention is a thermally sensitive recording medium, wherein the colloidal silica possesses a chain structure.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: January 26, 2010
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Takashi Date, Junpei Natsui, Yoshimi Midorikawa, Tatsuo Nagai, Yoshihide Kimura
  • Patent number: 7635661
    Abstract: A heat-sensitive recording material has a support, and a heat-sensitive recording layer including at least a leuco dye, a developer and a binder. The heat-sensitive recording layer contains secondary particles with an average particle diameter of 30 to 900 nm formed by aggregation of primary particles of amorphous silica with a particle diameter of at least 3 nm and less than 30 nm, and optionally a basic pigment. A protective layer may be formed on the heat-sensitive recording layer.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: December 22, 2009
    Assignee: OJI Paper Co., Ltd.
    Inventors: Takeshi Iida, Takeshi Shikano
  • Publication number: 20090227449
    Abstract: A transparent heat-sensitive recording material of the invention comprises (a) a transparent support; (b) a heat-sensitive recording layer containing a leuco dye and a developer and formed on the transparent support; and (c) a protective layer comprising as main components a pigment and a binder and formed on the heat-sensitive recording layer; wherein the pigment contained in the protective layer is (i) calcined kaolin and at least one main pigment selected from the group consisting of kaolin and aluminum hydroxide, or (ii) calcined kaolin, a third pigment, and at least one main pigment selected from the group consisting of kaolin and aluminum hydroxide; and the calcined kaolin is present in a proportion of 0.3 to 5 mass % relative to the protective layer.
    Type: Application
    Filed: August 24, 2006
    Publication date: September 10, 2009
    Applicant: OJI PAPER CO., LTD.
    Inventors: Nobuyuki Iwasaki, Kenji Muto, Masaharu Nojima
  • Patent number: 7585813
    Abstract: 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.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: September 8, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Hitoshi Shimbo, Tadafumi Tatewaki, Shin Yamamoto, Kunio Hayakawa, Shinya Kawahara
  • Patent number: 7579300
    Abstract: An object of the present invention is to provide an image recording material exhibiting an excellent exposure visualization property as well as an image formation process employing the image recording material, and further to provide not only a printing plate material exhibiting excellent on-press developability and printing durability, but also an image formation process employing the printing plate material, accompanied with an excellent exposure visualization property. Also disclosed is an image recording material possessing a support and provided thereon, a thermosensitive image formation layer, wherein the thermosensitive image formation layer contains thermoplastic spherical particles having an average particle diameter of 100-500 nm, and exhibits a structural color originated with the thermoplastic spherical particles.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: August 25, 2009
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventor: Takahiro Mori
  • Publication number: 20090186758
    Abstract: Record material imageable with a laser beam. The material is a substrate such as paper or polyolefin film having provided on at least one surface thereof a coating containing a solvent-soluble or disperse-type dye suitable for coloring plastics or polymers. Typical solvent-soluble and disperse-type dye include monoazo dyes, diazo dyes, anthraquinone dyes, coumarin dyes, quinoline dyes, xanthene dyes, and naphthalimide dyes. The record material does not show visible dye specks in the coating layer on the substrate because the dye has a very small average particle size—less than 50 microns. No more than 1% of the dye particles are larger than 100 microns. Also, method for imaging a substrate using heat energy by applying heat energy to the described record material to bring about a temperature in the coating greater than the melting temperature of the dye, causing color to become visible in the record material.
    Type: Application
    Filed: January 22, 2008
    Publication date: July 23, 2009
    Inventor: Pauline O. Ukpabi
  • Publication number: 20090075817
    Abstract: A thermosensitive recording material including a support, a thermosensitive recording layer composed mainly of a leuco dye and a developer, provided on one surface of the support, and a back layer provided on the other surface of the support, wherein the back layer contains an isobutylene-maleic anhydride copolymer ammonium salt, and at least one of an aziridine compound, and a cross-linked product of the isobutylene-maleic anhydride copolymer ammonium salt and the aziridine compound.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hideo AIHARA, Ichiro Sawamura, Hiroshi Tohmatsu, Shinji Okada, Hirokazu Watari
  • Patent number: 7501172
    Abstract: An integrated system for individually labeling a recording medium at the time that digital information is recorded thereon, by recording write data with a digital recorder on the read/write surface of the recording medium and recording image data by inducing visible color change with a laser in laser sensitive materials on the opposite surface of the recording medium.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: March 10, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Daryl E. Anderson, Makarand P. Gore, Paul J. McClellan
  • Patent number: 7432223
    Abstract: 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.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: October 7, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunio Hayakawa, Shinya Kawahara, Hitoshi Shimbo
  • Publication number: 20080234128
    Abstract: To provide a heat-sensitive recording material including a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developing layer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and acrylic resin or maleic acid copolymer resin.
    Type: Application
    Filed: March 18, 2008
    Publication date: September 25, 2008
    Applicant: Ricoh Company, Ltd.
    Inventors: Motoi ORIHARA, Norihiko Inaba
  • Patent number: 7425522
    Abstract: The present invention aims to provide thermosensitive recording materials that allow excellent stampability, prevent sticking, represent less image-density decrease due to image-shielding by protective layers, and generate less printing residual matters on heads. Specifically, the present invention provided thermosensitive recording materials that comprises a protective layer, a thermosensitive recording layer and a support in this order, wherein the thermosensitive recording layer develops a color by heating, the protective layer comprises a binder resin and an inorganic filler, the volume average particle diameter of the inorganic filler is 0.6 to 5.0 ?m, the content of the inorganic filler is 150 to 400% by mass based on the binder resin, and the protective layer comprises crosslinked polymethylmethacrylate particles.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: September 16, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Kadota, Toshiaki Ikeda
  • Patent number: 7422996
    Abstract: 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 ?m to 10.0 ?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.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: September 9, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Hitoshi Shimbo, Kunio Hayakawa, Shinya Kawahara