Patents by Inventor Haruka Inaba
Haruka Inaba 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: 9233519Abstract: A water-absorbent sheet structure comprises a structure in which an absorbent layer containing a water-absorbent resin (A) and a water-absorbent resin (B) is sandwiched with fibrous webs from an upper side and a lower side of the absorbent layer, characterized in that the water-absorbent resin (A) and the water-absorbent resin (B) are contained in a total amount of from 100 to 1,000 g/m2, and that the water-absorbent resin (A) and the water-absorbent resin (B) have the following properties: (1) the water-absorbent resin (A) having a water-retention capacity of saline solution (Ra) from 15 to 55 g/g; (2) the water-absorbent resin (B) having a water-retention capacity of saline solution (Rb) from 10 to 50 g/g; and (3) Ra and Rb mentioned above satisfies the relationship of the following formula: Ra?Rb?(g/g).Type: GrantFiled: December 27, 2010Date of Patent: January 12, 2016Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Kiyoshi Yamaguchi, Syuji Tsuno, Haruka Inaba, Masayoshi Handa
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Patent number: 9132048Abstract: A water-absorbent sheet structure comprising a structure in which an absorbent layer containing a water-absorbent resin is sandwiched with a hydrophilic nonwoven fabric from an upper side and a lower side of the absorbent layer, characterized in that at least one side of the upper side and the lower side of the water-absorbent sheet structure is subjected to embossing, wherein a central region W1 of a water-absorbent sheet structure 1 along a longitudinal direction of the structure 1 is subjected to: wavy embossing 2 comprising one wavy embossing extending along the longitudinal direction, wherein the embossing comprises one or more discontinued segments of the embossing, and linear embossing 4 in a direction from each of tips 3 of wavy forms formed by the wavy embossing 2 towards an edge portion contouring along the longitudinal direction of the water-absorbent sheet structure 1, and wherein a branched structure of embossing formed by the wavy embossing 2 and the linear embossing 4 has an approximate Y-shapeType: GrantFiled: September 27, 2011Date of Patent: September 15, 2015Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Hideki Matsushita, Haruka Inaba, Kana Kudo, Junichi Takatori
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Publication number: 20130178814Abstract: A water-absorbent sheet structure comprising a structure in which an absorbent layer containing a water-absorbent resin is sandwiched with a hydrophilic nonwoven fabric from an upper side and a lower side of the absorbent layer, characterized in that at least one side of the upper side and the lower side of the water-absorbent sheet structure is subjected to embossing, wherein a central region W1 of a water-absorbent sheet structure 1 along a longitudinal direction of the structure 1 is subjected to: wavy embossing 2 comprising one wavy embossing extending along the longitudinal direction, wherein the embossing comprises one or more discontinued segments of the embossing, and linear embossing 4 in a direction from each of tips 3 of wavy forms formed by the wavy embossing 2 towards an edge portion contouring along the longitudinal direction of the water-absorbent sheet structure 1, and wherein a branched structure of embossing formed by the wavy embossing 2 and the linear embossing 4 has an approximate Y-shapeType: ApplicationFiled: September 27, 2011Publication date: July 11, 2013Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Hideki Matsushita, Haruka Inaba, Kana Kudo, Junichi Takatori
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Publication number: 20130018349Abstract: A water-absorbent sheet structure comprising a structure in which an absorbent layer containing a water-absorbent resin is sandwiched with a hydrophilic nonwoven fabric from an upper side and a lower side of the absorbent layer, characterized in that at least one side of a topside and an underside of the water-absorbent sheet structure is subjected to embossing, and that the water-absorbent sheet structure has the following properties: when a saline solution is allowed to be absorbed in an amount of 4 L per 1 m2 of the water-absorbent sheet structure (4 L/m2), the water-absorbent sheet structure satisfies both of the following relationships of (A) and (B): (A) an expansion thickness ratio, i.e. T2/T1, of 2 or more, and (B) an expansion embossing depth, i.e. (T2?t2)/T2, of 0.Type: ApplicationFiled: March 10, 2011Publication date: January 17, 2013Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Junichi Takatori, Hideki Matsushita, Jun Sakata, Haruka Inaba
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Publication number: 20120328861Abstract: A water-absorbent sheet structure comprises a structure in which an absorbent layer comprising a water-absorbent resin and an adhesive is sandwiched with nonwoven fabrics from an upper side and a lower side of the absorbent layer, wherein the water-absorbent resin is contained in an amount of from 100 to 1,000 g/m2, and wherein a mass-average particle size of the water-absorbent resin is from 50 to 800 ?m, and wherein a particle size rate index of the water-absorbent resin is 0.12 s/?m or less, and wherein the water-absorbent sheet structure has a peeling strength of from 0.05 to 3.0 N/7 cm.Type: ApplicationFiled: December 27, 2010Publication date: December 27, 2012Applicant: SUMITOMO SEIKA CHEMICALS, CO., LTD.Inventors: Tetsuhiro Hinayama, Hideki Matsushita, Haruka Inaba, Masayoshi Handa
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Publication number: 20120308799Abstract: A water-absorbent sheet structure comprises a structure in which an absorbent layer containing a water-absorbent resin (A) and a water-absorbent resin (B) is sandwiched with fibrous webs from an upper side and a lower side of the absorbent layer, characterized in that the water-absorbent resin (A) and the water-absorbent resin (B) are contained in a total amount of from 100 to 1,000 g/m2, and that the water-absorbent resin (A) and the water-absorbent resin (B) have the following properties: (1) the water-absorbent resin (A) having a water-retention capacity of saline solution (Ra) from 15 to 55 g/g; (2) the water-absorbent resin (B) having a water-retention capacity of saline solution (Rb) from 10 to 50 g/g; and (3) Ra and Rb mentioned above satisfies the relationship of the following formula: Ra?Rb?(g/g).Type: ApplicationFiled: December 27, 2010Publication date: December 6, 2012Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Kiyoshi Yamaguchi, Syuji Tsuno, Haruka Inaba, Masayoshi Handa
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Publication number: 20120029456Abstract: A water-absorbent sheet comprising a structure comprising at least an absorbent layer containing a water-absorbent resin, sandwiched between two or more sheets of a hydrophilic nonwoven fabric, wherein the water-absorbent sheet is subjected to wavy embossing 2 and linear embossing 4, wherein a branched structure formed by the wavy embossing 2 and the linear embossing 4 has an approximate Y-shape-form, and wherein the edge portion contouring along the longitudinal direction of the water-absorbent sheet 1 comprises non-embossing regions W2 and W2?, and further wherein an areal percentage of embossment provided on the water-absorbent sheet 1 is from 3 to 25% of an entire area of the water-absorbent sheet 1.Type: ApplicationFiled: March 25, 2010Publication date: February 2, 2012Applicant: Sumitomo Seika Chemicals Co., Ltd.Inventors: Junichi Takatori, Jun Sakata, Haruka Inaba, Hideki Matsushita