Patents by Inventor Tsutomu Shirai
Tsutomu Shirai 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: 9173787Abstract: It is an object of the invention to provide an absorbent article that is resistant to twisting and flattening, and that is superior in terms of fluid absorption rate, fluid diffusibility, absorbed fluid retention volume and fluid retention. The absorbent article comprises a top sheet on the skin contact side, a back sheet on the non-skin contact side, and an absorbent body situated between the two sheets, wherein the absorbent body comprises a bulky absorbent sheet, and the bulky absorbent sheet comprises heat-expanding particles that are dispersed in the bulky absorbent sheet and have been expanded by heat.Type: GrantFiled: August 27, 2010Date of Patent: November 3, 2015Assignee: UNICHARM CORPORATIONInventors: Satoshi Nozaki, Tsutomu Shirai, Toshiyuki Tanio, Kiyoko Nishimura
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Patent number: 8778137Abstract: A process for producing a bulky paper with a concavo-convex pattern includes the steps of producing a wet mixed sheet comprising high-basis-weight regions and low-basis-weight regions from a paper-making material prepared by dispersing a fiber starting material and heat-expanding particles in water, the heat-expanding particles being evenly dispersed in the fiber in the high basis-weight and low basis-weight regions; and then heating the wet mixed sheet to cause expansion of the heat-expanding particles and form a concavo-convex pattern. This allows the free designing of concavo-convex sections on bulky papers.Type: GrantFiled: March 15, 2013Date of Patent: July 15, 2014Assignee: Unicharm CorporationInventors: Satoshi Nozaki, Tsutomu Shirai
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Publication number: 20130306258Abstract: A process for producing a bulky paper with a concavo-convex pattern includes the steps of producing a wet mixed sheet comprising high-basis-weight regions and low-basis-weight regions from a paper-making material prepared by dispersing a fiber starting material and heat-expanding particles in water, the heat-expanding particles being evenly dispersed in the fiber in the high basis-weight and low basis-weight regions; and then heating the wet mixed sheet to cause expansion of the heat-expanding particles and form a concavo-convex pattern. This allows the free designing of concavo-convex sections on bulky papers.Type: ApplicationFiled: March 15, 2013Publication date: November 21, 2013Inventors: Satoshi NOZAKI, Tsutomu SHIRAI
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Patent number: 8580080Abstract: The present invention relates to a process for producing a bulky paper with a concavo-convex pattern consisting of low density regions with a high degree of expansion of the heat-expanding particles and high density regions with a low degree of expansion of the heat-expanding particles, comprising: making a wet mixed sheet having heat-expanding particles uniformly dispersed in fibers from a paper-making material prepared by dispersing a fiber starting material and heat-expanding particles in water; then spraying prescribed sections of the wet mixed sheet with moist hot air or water vapor at above the initial expansion temperature of the heat-expanding particles to cause expansion of the heat-expanding particles at those sections; and then drying at a temperature at which the heat-expanding particles do not fully expand. The process allows free designing of concavo-convex sections on bulky papers.Type: GrantFiled: April 28, 2009Date of Patent: November 12, 2013Assignee: Unicharm CorporationInventors: Satoshi Nozaki, Tsutomu Shirai
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Patent number: 8449718Abstract: A process for producing a bulky paper with a concavo-convex pattern includes the steps of producing a wet mixed sheet comprising high-basis-weight regions and low-basis-weight regions from a paper-making material prepared by dispersing a fiber starting material and heat-expanding particles in water, the heat-expanding particles being evenly dispersed in the fiber in the high basis-weight and low basis-weight regions; and then heating the wet mixed sheet to cause expansion of the heat-expanding particles and form a concavo-convex pattern. This allows the free designing of concavo-convex sections on bulky papers.Type: GrantFiled: April 28, 2009Date of Patent: May 28, 2013Assignee: Unicharm CorporationInventors: Satoshi Nozaki, Tsutomu Shirai
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Publication number: 20120191055Abstract: It is an object of the invention to provide an absorbent article that is resistant to twisting and flattening, and that is superior in terms of fluid absorption rate, fluid diffusibility, absorbed fluid retention volume and fluid retention. The absorbent article comprises a top sheet on the skin contact side, a back sheet on the non-skin contact side, and an absorbent body situated between the two sheets, wherein the absorbent body comprises a bulky absorbent sheet, and the bulky absorbent sheet comprises heat-expanding particles that are dispersed in the bulky absorbent sheet and have been expanded by heat.Type: ApplicationFiled: August 27, 2010Publication date: July 26, 2012Applicant: UNICHARM CORPORATIONInventors: Satoshi Nozaki, Tsutomu Shirai, Toshiyuki Tanio, Kiyoko Nishimura
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Publication number: 20120191056Abstract: It is an object of the invention to provide a layered absorbent sheet with excellent absorption properties including fluid retention, fluid diffusibility and absorbed fluid retention volume, and with particularly excellent deformation resistance against deformation by twisting and wrinkles. A layered absorbent sheet comprising a first sheet layer on the absorbing side, a second sheet layer on the non-absorbing side, and a super-absorbent polymer layer between the first sheet layer and second sheet layer, wherein the first sheet and/or second sheet are bulky absorbent sheets, the bulky absorbent sheets comprising heat-expanding particles that are dispersed in the bulky absorbent sheet and have been expanded by heat.Type: ApplicationFiled: August 27, 2010Publication date: July 26, 2012Applicant: UNICHARM CORPORATIONInventors: Satoshi Nozaki, Tsutomu Shirai, Toshiyuki Tanio
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Publication number: 20110294388Abstract: The present invention provides a water-disintegrable nonwoven fabric having a high strength and flexibility. The water-disintegrable nonwoven fabric includes fibers mechanically entangled with one another and adapted to be disentangled from one another when it is stirred in water. 10 to 50% by mass of the fibers is occupied by ultrafine thermoplastic synthetic fibers each having a fineness of 0.01 to 0.5 dtex and a fiber length of 3 to 10 mm. 90 to 50% by mass of the fibers is occupied by at least one of chemical fibers each having a fineness of 1 to 2 dtex and a fiber length of 5 to 20 mm and pulp fibers having a freeness of 600 to 770 cc.Type: ApplicationFiled: February 3, 2010Publication date: December 1, 2011Applicant: UNI-CHARM CORPORATIONInventors: Takayoshi Konishi, Tsutomu Shirai, Kenichi Sasayama
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Publication number: 20110083819Abstract: The present invention relates to a process for producing a bulky paper with a concavo-convex pattern consisting of low density regions with a high degree of expansion of the heat-expanding particles and high density regions with a low degree of expansion of the heat-expanding particles, comprising: making a wet mixed sheet having heat-expanding particles uniformly dispersed in fibers from a paper-making material prepared by dispersing a fiber starting material and heat-expanding particles in water; then spraying prescribed sections of the wet mixed sheet with moist hot air or water vapor at above the initial expansion temperature of the heat-expanding particles to cause expansion of the heat-expanding particles at those sections; and then drying at a temperature at which the heat-expanding particles do not fully expand. The process allows free designing of concavo-convex sections on bulky papers.Type: ApplicationFiled: April 28, 2009Publication date: April 14, 2011Applicant: Unicharm CorporationInventors: Satoshi Nozaki, Tsutomu Shirai