Patents by Inventor Hiroshi Koyamoto
Hiroshi Koyamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11905662Abstract: An object is to provide a paper barrier material resistant to fractures due to water vapor expansion when heated. As a solution, a paper barrier material is provided, which is characterized in that it comprises a gas barrier layer, a seal layer, a paper base material, and a pigment coating layer, being stacked in this order, wherein the laminate consisting only of the paper base material and pigment coating layer has an air permeation resistance of 2,500 seconds or lower as measured based on JAPAN TAPPI No. 5-2: 2000.Type: GrantFiled: March 17, 2020Date of Patent: February 20, 2024Assignees: NIPPON PAPER INDUSTRIES CO., LTD., JUJO THERMAL OYInventors: Masaaki Fukunaga, Hiroshi Koyamoto, Yuri Oishi, Masatsugu Kato, Akio Miyajima, Masashi Okamoto
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Patent number: 11834791Abstract: A method for manufacturing a paper barrier base material includes a step of applying a water vapor barrier layer coating liquid that contains at least a water vapor barrier resin and a pigment onto a paper base material by a curtain coating method to form a water vapor barrier layer, and a step of applying a gas barrier layer coating liquid that contains at least one polymer selected from water-soluble polymers and water-dispersible polymers onto the water vapor barrier layer by a curtain coating method without a drying step interposed between the two steps to form a gas barrier layer. The gas barrier layer coating liquid has a B-type viscosity equal to or higher than a B-type viscosity of the water vapor barrier layer coating liquid. The method is intended to suppress the occurrence of coating unevenness in wet-on-wet coating by a curtain coating method.Type: GrantFiled: March 26, 2020Date of Patent: December 5, 2023Assignees: NIPPON PAPER INDUSTRIES CO., LTD., JUJO THERMAL OYInventors: Kenta Watanabe, Yuri Oishi, Satoshi Tsuda, Masashi Okamoto, Hiroshi Koyamoto
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Publication number: 20220213652Abstract: A method for manufacturing a paper barrier base material includes a step of applying a water vapor barrier layer coating liquid that contains at least a water vapor barrier resin and a pigment onto a paper base material by a curtain coating method to form a water vapor barrier layer. The water vapor barrier layer coating liquid has a spinnability of 0.07 seconds or more and 0.4 seconds or less at a solid content concentration of 32% by weight and a temperature of 25° C. The method is intended to achieve good stability of a coating liquid and good continuous operability.Type: ApplicationFiled: March 27, 2020Publication date: July 7, 2022Inventors: Yuri OISHI, Kenta WATANABE, Satoshi TSUDA, Masashi OKAMOTO, Hiroshi KOYAMOTO
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Publication number: 20220154403Abstract: A method for manufacturing a paper barrier base material includes a step of applying a water vapor barrier layer coating liquid that contains at least a water vapor barrier resin and a pigment onto a paper base material by a curtain coating method to form a water vapor barrier layer, and a step of applying a gas barrier layer coating liquid that contains at least one polymer selected from water-soluble polymers and water-dispersible polymers onto the water vapor barrier layer by a curtain coating method without a drying step interposed between the two steps to form a gas barrier layer. The gas barrier layer coating liquid has a B-type viscosity equal to or higher than a B-type viscosity of the water vapor barrier layer coating liquid. The method is intended to suppress the occurrence of coating unevenness in wet-on-wet coating by a curtain coating method.Type: ApplicationFiled: March 26, 2020Publication date: May 19, 2022Inventors: Kenta WATANABE, Yuri OISHI, Satoshi TSUDA, Masashi OKAMOTO, Hiroshi KOYAMOTO
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Publication number: 20220120038Abstract: An object is to provide a paper barrier material resistant to fractures due to water vapor expansion when heated. As a solution, a paper barrier material is provided, which is characterized in that it comprises a gas barrier layer, a seal layer, a paper base material, and a pigment coating layer, being stacked in this order, wherein the laminate consisting only of the paper base material and pigment coating layer has an air permeation resistance of 2,500 seconds or lower as measured based on JAPAN TAPPI No. 5-2: 2000.Type: ApplicationFiled: March 17, 2020Publication date: April 21, 2022Inventors: Masaaki FUKUNAGA, Hiroshi KOYAMOTO, Yuri OISHI, Masatsugu KATO, Akio MIYAJIMA, Masashi OKAMOTO
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Patent number: 10882676Abstract: An object is to provide a paper barrier material having excellent gas barrier property as well as excellent water vapor barrier property, wherein such paper barrier material is suitable for packaging applications such as food packaging materials, containers, and cups. The means for achieving the object is to provide a paper barrier material characterized in that it meets the conditions in (1) to (3) below: (1) the water vapor permeability at 40±0.5° C. in temperature and 90±2% in relative humidity is 3 g/m2·day or below; (2) the oxygen permeability at 23° C. in temperature and 0% in relative humidity is 3 ml/m2·day·atm or below; and (3) the oxygen permeability at 23° C. in temperature and 85% in relative humidity is 3 ml/m2·day·atm or below.Type: GrantFiled: September 29, 2017Date of Patent: January 5, 2021Assignee: NIPPON PAPER INDUSTRIES CO., LTD.Inventors: Masashi Okamoto, Yuri Oishi, Masatsugu Kato, Masaaki Fukunaga, Akio Miyajima, Hiroshi Koyamoto
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Publication number: 20190308786Abstract: An object is to provide a paper barrier material having excellent gas barrier property as well as excellent water vapor barrier property, wherein such paper barrier material is suitable for packaging applications such as food packaging materials, containers, and cups. The means for achieving the object is to provide a paper barrier material characterized in that it meets the conditions in (1) to (3) below: (1) the water vapor permeability at 40±0.5° C. in temperature and 90±2% in relative humidity is 3 g/m2·day or below; (2) the oxygen permeability at 23° C. in temperature and 0% in relative humidity is 3 ml/m2·day·atm or below; and (3) the oxygen permeability at 23° C. in temperature and 85% in relative humidity is 3 ml/m2·day·atm or below.Type: ApplicationFiled: September 29, 2017Publication date: October 10, 2019Inventors: Masashi OKAMOTO, Yuri OISHI, Masatsugu KATO, Masaaki FUKUNAGA, Akio MIYAJIMA, Hiroshi KOYAMOTO
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Publication number: 20120043372Abstract: The present invention aims to provide a cast-coated paper having good coated paper quality and printability combined with the property of decomposing hazardous substances upon exposure to light. A cast-coated paper prepared by applying a cast-coating layer based on a pigment and a binder on abase paper and finished by pressing the cast-coating layer in the wet state against a heated cast drum surface and drying it, wherein the cast-coating layer contains 1-30 parts by weight of titanium dioxide having an average secondary particle diameter of 300-2000 nm per 100 parts by weight of the pigment and the titanium dioxide is premixed with a silica sol or alumina sol at a ratio of the titanium dioxide to the silica sol or alumina sol of 2:1-1:2.Type: ApplicationFiled: June 7, 2007Publication date: February 23, 2012Applicants: NIPPON PAPER CRECIA CO., LTD., NIPPON PAPER INDUSTRIES CO., LTD.Inventors: Hiroshi Koyamoto, Koji Kutsuwa, Masashi Okamoto, Hidehiko Kai, Koji Okomori, Takashi Ochi, Noriyuki Ishibashi, Nobumasa Hayashi
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Patent number: 7901542Abstract: The present invention aims to provide coated papers for newsprint inks having fast ink drying properties comparable to those of conventional newsprint papers, without stickiness, and having good reproduction and sharpness of printed images comparable to those of coated papers printed using penetration drying type inks; as well as processes for preparing them. The invention provides for a coated printing paper for newsprint inks comprising a coating layer containing a pigment and an adhesive on a base paper, characterized in that the coating layer on the base paper has a coat weight of 4.0 g/m2 or more per side and that the coated paper has an oil absorbency under pressure of 20 g/m2 or more and a Bekk smoothness of 75 seconds or less; as well as a process for preparing the paper.Type: GrantFiled: December 27, 2004Date of Patent: March 8, 2011Assignee: Nippon Paper Industries Co., Ltd.Inventors: Hiroshi Koyamoto, Koji Okomori, Masahito Suzuki, Hirokazu Morii
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Publication number: 20100291323Abstract: An inkjet recording medium comprising an ink-receiving layer containing a pigment and a binder formed on at least one side of a base paper containing calcium carbonate as a filler and pulp by a cast coating method, wherein the ash content of the calcium carbonate in the base paper is 15-30% by mass, and the ink-receiving layer contains colloidal silica as the pigment having a primary particle diameter of 30-70 nm and a ratio of the secondary particle diameter to the primary particle diameter of 1.5-3.0.Type: ApplicationFiled: September 29, 2008Publication date: November 18, 2010Inventors: Masafumi Wasai, Masaya Tosaka, Hiroshi Koyamoto, Kei Takigawa, Takayuki Sato, Atsushi Ono, Yoshio Yoshida
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Patent number: 7575802Abstract: The present invention aims to provide coated printing papers having fast ink drying properties comparable to those of conventional newsprint, without stickiness, having good printability such as sharpness of printed images comparable to those of coated papers, as well as having the effect of decomposing harmful substances by exposure to light, especially when using penetration drying type news inks. A coated printing paper is provided, comprising a coating layer containing a pigment and an adhesive on a base paper, characterized in that a fine titanium oxide powder having a photocatalytic effect is contained in the coating layer and that the coated paper has an oil absorbency of 20 g/m2 or more under pressure and a Bekk smoothness of 75 seconds or less.Type: GrantFiled: December 1, 2005Date of Patent: August 18, 2009Assignee: Nippon Paper Industries Co., Ltd.Inventors: Akinobu Chatani, Koji Okomori, Hiroshi Koyamoto, Hitoshi Nagao, Hirokazu Morii
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Publication number: 20090162641Abstract: The present invention aims to provide coated printing paper having good printing quality combined with the property of decomposing hazardous substances upon exposure to light and resistance to fading. Coated printing paper comprising a coating layer containing a pigment and an inorganic adhesive and an organic adhesive on a base paper, wherein the coating layer contains 1-30 parts by weight of titanium dioxide having an average secondary particle diameter of 300-2000 nm per 100 parts by weight of the pigment and the coated paper has a PPS roughness of 0.5-5.0 ?m.Type: ApplicationFiled: December 14, 2006Publication date: June 25, 2009Applicant: NIPPON PAPER INDUSTRIES CO., LTD.Inventors: Hiroshi Koyamoto, Masashi Okamoto, Koji Okomori, Takashi Ochi
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Publication number: 20090162642Abstract: Provide a paper offering good paper strength properties in terms of strength and stiffness, high smoothness and excellent printing quality by adjusting the ash content in paper to a range of 3 to 40 percent by solid weight and allowing the paper to contain a pre-coagulated filler having an average particle size of 10 to 80 ?m as measured by the laser diffraction method, wherein such filler is obtained by processing a filler using a composite acrylamide copolymer comprising (A) an anionic polysaccharide and (B) a cationic and/or amphoteric acrylamide copolymer.Type: ApplicationFiled: January 26, 2007Publication date: June 25, 2009Inventors: Katsumasa Ono, Koji Kutsuwa, Tomohiro Yokohara, Fuminari Nonomura, Masayuki Watanabe, Hiroshi Koyamoto, Akinobu Chatani, Yoshiharu Kimura, Takao Sezaki
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Publication number: 20070240838Abstract: The present invention aims to provide coated papers for newsprint inks having fast ink drying properties comparable to those of conventional newsprint papers, without stickiness, and having good reproduction and sharpness of printed images comparable to those of coated papers printed using penetration drying type inks; as well as processes for preparing them. Herein disclosed is a coated printing paper for newsprint inks comprising a coating layer containing a pigment and an adhesive on a base paper, characterized in that the coating layer on the base paper has a coat weight of 4.0 g/m2 or more per side and that the coated paper has an oil absorbency under pressure of 20 g/m2 or more and a Bekk smoothness of 75 seconds or less; as well as a process for preparing the paper.Type: ApplicationFiled: December 27, 2004Publication date: October 18, 2007Inventors: Hiroshi Koyamoto, Koji Okomori, Masahito Suzuki, Hirokazu Morii
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Publication number: 20060137841Abstract: The present invention aims to provide coated printing papers having fast ink drying properties comparable to those of conventional newsprint, without stickiness, having good printability such as sharpness of printed images comparable to those of coated papers, as well as having the effect of decomposing harmful substances by exposure to light, especially when using penetration drying type news inks. A coated printing paper is provided, comprising a coating layer containing a pigment and an adhesive on a base paper, characterized in that a fine titanium oxide powder having a photocatalytic effect is contained in the coating layer and that the coated paper has an oil absorbency of 20 g/m2 or more under pressure and a Bekk smoothness of 75 seconds or less.Type: ApplicationFiled: December 1, 2005Publication date: June 29, 2006Inventors: Akinobu Chatani, Koji Okomori, Hiroshi Koyamoto, Hitoshi Nagao, Hirokazu Morii