Patents by Inventor Yoshiaki Kumamoto
Yoshiaki Kumamoto 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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Publication number: 20150011685Abstract: A polyester resin composition containing a polyester resin, and a fine cellulose fiber composite having an average fiber diameter of from 0.1 to 200 nm, wherein the fine cellulose fiber composite contains fine cellulose fibers and hydrocarbon groups being connected thereto via an amide bond. The polyester resin composition of the present invention can be worked into a molded article by thermoforming or injection-molding, and is suitably used for various industrial applications, such as daily sundries, household electric appliance parts, packaging materials for household electric appliance parts, and automobile parts. In addition, the fine cellulose fiber composite has high dispersibility against various resins and can exhibit thickening effects, so that it is suitable as various thickeners or the like.Type: ApplicationFiled: December 20, 2012Publication date: January 8, 2015Applicant: KAO CORPORATIONInventors: Masahiro Mori, Motoi Konishi, Akiyoshi Kimura, Masahiro Fujioka, Kenta Mukai, Yoshiaki Kumamoto
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Publication number: 20120283363Abstract: A composite material of the invention is a mixture of cellulose microfibers having a carboxyl group content of 0.1 to 3 mmol/g and a moldable polymeric material selected from the group consisting of a biomass-derived polymer and a petroleum-derived polymer. The biomass-derived polymer is preferably polylactic acid or pulp. The cellulose microfibers are preferably present in an amount of 0.01% to 60% by mass. Another composite material of the invention is a mixture of cellulose composite microfibers and a moldable resin, the cellulose composite microfibers being obtained by adsorbing a surfactant onto cellulose microfibers having a carboxyl group content of 0.1 to 3 mmol/g.Type: ApplicationFiled: December 10, 2010Publication date: November 8, 2012Applicant: KAO CORPORATIONInventors: Yoshiaki Kumamoto, Kenta Mukai, Hironobu Kawajiri, Akira Takenaka, Taiki Yoshino, Akira Isogai, Motoi Konishi, Tetsuji Kito
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Publication number: 20120237761Abstract: A membrane structure contains cellulose microfibers and an inorganic layered compound. The cellulose constituting the cellulose microfibers has a carboxyl content of 0.1 to 3 mmol/g. The mass ratio of the inorganic layered compound to the cellulose microfibers is 0.01 to 100. The inorganic layered compound preferably has an average particle size of 0.01 to 10 ?m and has an amount of charge of 1 to 1000 eq/g. The membrane structure is preferably prepared by using an aqueous dispersion containing cellulose microfibers having a carboxyl content of 0.1 to 3 mmol/g, an inorganic layered compound, and a basic substance.Type: ApplicationFiled: November 24, 2010Publication date: September 20, 2012Applicant: KAO CORPORATIONInventors: Kenta Mukai, Yoshiaki Kumamoto, Kazuhiro Iitaka, Ryota Shiiba, Toru Ugajin
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Patent number: 8256412Abstract: A warming device of sheet form having (1) a heat generating sheet prepared by papermaking and containing an oxidizable metal, a moisture retaining agent, and a fibrous material and (2) an air permeable holder holding the heat generating sheet. The warming device has a thickness of 0.1 to 10 mm and a flexural strength of 0.01 to 0.3 N/cm. The sheet preferably has a thickness of 0.1 to 2.0 mm. The fibrous material preferably has a CSF of 600 ml or less.Type: GrantFiled: July 29, 2004Date of Patent: September 4, 2012Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Masataka Ishikawa, Hironobu Kawajiri, Hisao Nishiguchi
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Patent number: 8197526Abstract: A warming article having a heat generating main body (4). The heat generating main body (4) is composed of a heat generating element (2) having water vapor generating capability and an air permeable holder (3) for holding the heat generating element (2). The heat generating main body (4) is configured to expand with heat generation of the heat generating element (2). The amount of water vapor generated from the warming article is preferably 1.0 to 100 mg/(cm2·10 min). The holder (3) preferably has a water vapor permeability of 1.5 to 10 kg/(m2·24 hr). The heat generating element (2) is preferably a sheet molded by papermaking and containing an oxidizable metal, a moisture-retaining agent, and a fibrous material.Type: GrantFiled: May 7, 2004Date of Patent: June 12, 2012Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Masataka Ishikawa, Takao Orii
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Publication number: 20120000392Abstract: A suspension of cellulose fibers, containing a cellulose fiber, wherein the cellulose fiber contains a cellulose fiber with an average fiber diameter of not more than 200 nm, a content of carboxyl groups in cellulose composing the cellulose fibers is 0.1 to 2 mmol/g, and a metal selected from a polyvalent metal and a monovalent metal (with the proviso that single sodium is excluded) is contained in the cellulose fiber to form a counter ion for the carboxyl group.Type: ApplicationFiled: December 25, 2009Publication date: January 5, 2012Applicants: THE UNIVERSITY OF TOKYO, KAO CORPORATIONInventors: Kenta Mukai, Yoshiaki Kumamoto, Akira Isogai
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Patent number: 8084139Abstract: A molded article containing a powder and a fibrous material which is obtained by a wet papermaking process. The fibrous material has a fiber length frequency distribution such that 30% to 90% of the fibrous material have a fiber length of 0.4 to 2.0 mm and that 9% to 50% of the fibrous material has a fiber length of 0.4 mm or less. The molded article contains at least 50% by weight of the powder.Type: GrantFiled: April 28, 2005Date of Patent: December 27, 2011Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Masataka Ishikawa
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Publication number: 20110281487Abstract: The present invention provides the gas barrier molded article having high permeation barrier properties against oxygen gas, water vapor and the like. A gas barrier material containing cellulose fibers having an average fiber diameter of not more than 200 nm wherein the content of carboxyl group in a cellulose ranges from 0.1 to 2 mmol/g; and further a cross-linking agent having a reactive functional group or the cellulose fibers being dried or heated or a gas barrier molded article containing a molded substrate and a layer composed of the gas barrier material on the surface of the molded substrate.Type: ApplicationFiled: December 25, 2009Publication date: November 17, 2011Applicant: KAO CORPORATIONInventors: Kenta Mukai, Yoshiaki Kumamoto, Akira Isogai, Zenbei Meiwa, Takahiro Maezawa, Toru Ugajin
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Publication number: 20110262731Abstract: The present invention provides the suspension of cellulose fibers suitable for producing an oxygen gas barrier film. The present invention provides a suspension of cellulose fibers containing cellulose fibers, a polyvalent metal and a volatile base, wherein the cellulose fibers have an average fiber diameter of not more than 200 nm and the content of carboxyl groups of cellulose composing the cellulose fibers of 0.1 to 2 mmol/g. The suspension is a good material for a film having oxygen gas barrier properties. The present invention provides a film containing cellulose fibers and an inorganic or organic metal salt, wherein the cellulose fibers have an average fiber diameter of not more than 200 nm and the content of carboxyl groups of cellulose composing the cellulose fibers of 0.1 to 2 mmol/g.Type: ApplicationFiled: December 25, 2009Publication date: October 27, 2011Applicant: KAO CORPORATIONInventors: Kenta Mukai, Yoshiaki Kumamoto
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Patent number: 8029896Abstract: Provided is a material for gas barrier containing cellulose fibers having an average fiber diameter of not more than 200 nm, wherein the content of the carboxyl group in a cellulose composing the cellulose fiber is 0.1 to 2 mmol/g. A molded composite having gas barrier properties such as high oxygen barrier properties can be produced by applying the material for gas barrier on a substrate and drying.Type: GrantFiled: August 7, 2008Date of Patent: October 4, 2011Assignee: Kao CorporationInventors: Yoshiaki Kumamoto, Kenta Mukai, Toru Ugajin, Takahiro Maezawa, Naoki Honbo, Akira Isogai
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Publication number: 20100316863Abstract: Provided is a material for gas barrier containing cellulose fibers having an average fiber diameter of not more than 200 nm, wherein the content of the carboxyl group in a cellulose composing the cellulose fiber is 0.1 to 2 mmol/g. A molded composite having gas barrier properties such as high oxygen barrier properties can be produced by applying the material for gas barrier on a substrate and drying.Type: ApplicationFiled: August 7, 2008Publication date: December 16, 2010Applicant: Kao CorporationInventors: Yoshiaki Kumamoto, Kenta Mukai, Toru Ugajin, Takahiro Maezawa, Naoki Honbo, Akira Isogai
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Patent number: 7749357Abstract: A molded sheet containing at least an oxidizable metal, a moisture retaining agent, and a fibrous material and having a content of components other than the fibrous material of 50% by weight or higher. The sheet has a thickness of 0.08 to 1.2 mm and a breaking length of 100 to 4000 m.Type: GrantFiled: June 11, 2003Date of Patent: July 6, 2010Assignee: KAO CorporationInventors: Yoshiaki Kumamoto, Masataka Ishikawa, Kunio Matsui
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Patent number: 7625464Abstract: A process of producing a heat generating molded article comprising the steps of making an intermediate product by a papermaking process from a raw material composition containing at least an oxidizable metal powder, a moisture retaining agent, a fibrous material, and water and incorporating an electrolyte into the resulting intermediate product.Type: GrantFiled: September 26, 2002Date of Patent: December 1, 2009Assignee: Kao CorporationInventors: Kunio Matsui, Yoshiaki Kumamoto, Masataka Ishikawa
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Publication number: 20090101867Abstract: A heat generating element of the present invention contains an oxidizable metal, a moisture retaining agent, water, an electrolyte as an oxidation promoter, and a particulate hardening inhibitor. The particle size of the particulate hardening inhibitor is preferably 25% or smaller of that of the oxidizable metal. The heat generating element in which the oxidizable metal to the particulate hardening inhibitor mass ratio is preferably 1 to 30. The particulate hardening inhibitor preferably has a particle size of 10 ?m or smaller.Type: ApplicationFiled: August 8, 2006Publication date: April 23, 2009Applicant: Kao CorporationInventors: Masataka Ishikawa, Yoshiaki Kumamoto, Takeshi Oka
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Publication number: 20080292879Abstract: A molded article containing a powder and a fibrous material which is obtained by a wet papermaking process. The fibrous material has a fiber length frequency distribution such that 30% to 90% of the fibrous material have a fiber length of 0.4 to 2.0 mm and that 9% to 50% of the fibrous material has a fiber length of 0.4 mm or less. The molded article contains at least 50% by weight of the powder.Type: ApplicationFiled: April 28, 2005Publication date: November 27, 2008Applicant: Kao CorporationInventors: Yoshiaki Kumamoto, Masataka Ishikawa
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Patent number: 7370788Abstract: A molded article (10) made predominantly of pulp and comprising a bottom portion (13) and a body portion (12), wherein the angle ? between the outer surface of a side wall of the body portion (12) and the ground contact plane (B) of the bottom portion (13) is 85° or greater, and the height of the body portion (12) is 50 mm or more.Type: GrantFiled: May 6, 1999Date of Patent: May 13, 2008Assignee: Kao CorporationInventors: Kenichi Otani, Yoshiaki Kumamoto, Koichi Sagara, Shinji Kodama, Minoru Goto, Susumu Fujinami, Tokuo Tsuura, Shinji Otakura, Takehiko Tojo, Yukiya Sato, Masataka Ishikawa, Shingo Odajima, Masanori Takita
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Patent number: 7353820Abstract: A warming device consisting essentially of a heat generating main body comprising a heat generating element and an air-permeable holding member having the heat generating element enclosed therein. The warming device has a receiving part for receiving a part of a body being inserted. The heat generating element comprises a sheet which contains an oxidizable metal, a moisture-retaining agent, and a fibrous material and is prepared by papermaking.Type: GrantFiled: June 23, 2004Date of Patent: April 8, 2008Assignee: KAO CorporationInventors: Yoshiaki Kumamoto, Masataka Ishikawa, Takao Orii, Christine Hall, Jill Kathleen Lynch
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Publication number: 20070020412Abstract: A warming device of sheet form having (1) a heat generating sheet prepared by papermaking and containing an oxidizable metal, a moisture retaining agent, and a fibrous material and (2) an air permeable holder holding the heat generating sheet. The warming device has a thickness of 0.1 to 10 mm and a flexural strength of 0.01 to 0.3 N/cm. The sheet preferably has a thickness of 0.1 to 2.0 mm. The fibrous material preferably has a CSF of 600 ml or less.Type: ApplicationFiled: July 29, 2004Publication date: January 25, 2007Inventors: Yoshiaki Kumamoto, Masataka Ishikawa, Hironobu Kawajiri, Hisao Nishiguchi
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Publication number: 20060276863Abstract: A warming article having a heat generating main body (4). The heat generating main body (4) is composed of a heat generating element (2) having water vapor generating capability and an air permeable holder (3) for holding the heat generating element (2). The heat generating main body (4) is configured to expand with heat generation of the heat generating element (2). The amount of water vapor generated from the warming article is preferably 1.0 to 100 mg/(cm2·10 min). The holder (3) preferably has a water vapor permeability of 1.5 to 10 kg/(m2·24 hr). The heat generating element (2) is preferably a sheet molded by papermaking and containing an oxidizable metal, a moisture-retaining agent, and a fibrous material.Type: ApplicationFiled: May 7, 2004Publication date: December 7, 2006Applicant: KAO CORPORATIONInventors: Yoshiaki Kumamoto, Masatake Ishikawa, Takao Orii
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Patent number: 7077933Abstract: A pulp molded article (1) of the present invention comprises a neck portion (2) and a thread (5) provided on the outer surface of the neck portion (2), and has an overrun torque of 1 N·m or higher between the neck portion and a threaded cap screwed on the neck portion (2).Type: GrantFiled: February 27, 2001Date of Patent: July 18, 2006Assignee: Kao CorporationInventors: Kenichi Otani, Yoshiaki Kumamoto