Patents by Inventor Masashi Nakashita
Masashi Nakashita 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: 8895799Abstract: Provided are an absorbent and an absorptive article containing the absorbent which has excellent water absorbability and leakage prevention ability, and has an intent to achieve reductions in the weight and thickness of an absorptive article. The absorbent comprises a polysaccharide that causes a gelation reaction in the presence of a polyvalent metal ion and a source of the polyvalent ion, in which the polyvalent ion is supplied simultaneously with or after dissolution and swelling of the polysaccharide. The absorptive article containing the absorbent can achieve excellent water absorbability and leakage prevention ability and thus reductions in the weight and thickness as the absorptive article.Type: GrantFiled: March 26, 2009Date of Patent: November 25, 2014Assignee: Uni-Charm CorporationInventors: Hisashi Takai, Takayoshi Konishi, Masashi Nakashita
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Publication number: 20140052086Abstract: An object of the disclosure is to provide an absorbent article that allows the user to visually confirm reduction in residue of highly viscous menstrual blood on the top sheet after its absorption, thereby providing reassurance to the user. The absorbent article of the disclosure is as follows. An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body between the liquid-permeable top sheet and liquid-impermeable back sheet, wherein the top sheet exhibits a color difference in the range of 37-80, based on the L*a*b* color system and measured from a skin contact surface of the top sheet in a liquid dropping test.Type: ApplicationFiled: April 23, 2012Publication date: February 20, 2014Applicant: UNICHARM CORPORATIONInventors: Shimpei Komatsu, Yuki Noda, Mitsuhiro Wada, Akira Hashino, Hideyuki Kinoshita, Masashi Nakashita, Ichiro Wada
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Publication number: 20130172842Abstract: A nonwoven fabric with excellent feel on the skin, excellent air permeability and liquid permeability, and high deformability and superior recoverability. The nonwoven fabric comprises composite fibers that include a first component, and a second component having a lower melting point than the first component, wherein detached portions are created by detaching at least a portion of the second component from the first component and/or the residual portion of the second component, and at least some of the detached portions are tangled and/or fused with other composite fibers.Type: ApplicationFiled: September 22, 2011Publication date: July 4, 2013Inventors: Satoshi Mitsuno, Masashi Nakashita
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Publication number: 20130079741Abstract: Disclosed is an absorbent article containing an absorbent body which is thin before absorption, and even after absorption does not inhibit super absorbent polymer (SAP) swelling and wherein deformation such as twisting is unlikely to occur. The disclosed absorbent article comprises a liquid-permeable front surface sheet, a liquid impermeable rear surface sheet, and an absorbent body which is located between the two sheets. The absorbent body is formed from a super absorbent polymer containing layer and a non-woven fabric layer, with the non-woven fabric layer having regions wherein the between-fibre void ratio is relatively large and regions wherein the between-fibre void ratio is relatively small. The tip sections of the fibres forming the non-woven fabric layer are greater in number in the regions wherein the between-fibre void ratio is relatively large than the regions wherein the between-fibre void ratio is relatively small, and the non-woven fabric layer has expansibility.Type: ApplicationFiled: June 27, 2011Publication date: March 28, 2013Applicant: UNICHARM CORPORATIONInventors: Masashi Nakashita, Satoshi Mitsuno
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Publication number: 20120165773Abstract: An absorbent core comprising a gelling region and a thickening region, as well as an absorbent article containing the absorbent core. The absorbent core formed from at least two layers. The absorbent core has in an upper layer gelling region comprising a gelling agent that contains a polysaccharide capable of thickening in the presence of a polyvalent metal ion and a substance that can supply a polyvalent metal ion, and has in a lower layer, thickening region comprising a thickening agent.Type: ApplicationFiled: July 6, 2010Publication date: June 28, 2012Inventors: Masashi Nakashita, Takayoshi Konishi, Satoshi Mizutani
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Publication number: 20120115718Abstract: An absorbent core that can promote and/or inhibit gelling, and an absorbent article comprising it. The absorbent core includes a gelling agent that contains a polysaccharide capable of thickening in the presence of a polyvalent metal ion, a substance that can supply a polyvalent metal ion, and an organic acid and/or polyvalent metal ion scavenger.Type: ApplicationFiled: July 6, 2010Publication date: May 10, 2012Applicant: UNI-CHARM CORPORATIONInventors: Masashi Nakashita, Takayoshi Konishi, Satoshi Mizutani
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Publication number: 20110028928Abstract: Provided are an absorbent and an absorptive article containing the absorbent which has excellent water absorbability and leakage prevention ability, and has an intent to achieve reductions in the weight and thickness of an absorptive article. The absorbent comprises a polysaccharide that causes a gelation reaction in the presence of a polyvalent metal ion and a source of the polyvalent ion, in which the polyvalent ion is supplied simultaneously with or after dissolution and swelling of the polysaccharide. The absorptive article containing the absorbent can achieve excellent water absorbability and leakage prevention ability and thus reductions in the weight and thickness as the absorptive article.Type: ApplicationFiled: March 26, 2009Publication date: February 3, 2011Applicant: UNI-CHARM CORPORATIONInventors: Hisashi Takai, Takayoshi Konishi, Masashi Nakashita
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Patent number: 7560002Abstract: A water-absorbent structure comprises an assembly of thermoplastic synthetic fibers, cellulose-based fibers, super-absorbent polymer and water-pervious sheets wrapping these components together. The assembly is a honeycomb construction having a plurality of through-holes and normally in a compressed state. Upon water permeation into the water-absorbent structure, the super-absorbent polymer is swollen and softened and the assembly is swollen so that the through-holes restore the initial state before the assembly has been compressed.Type: GrantFiled: August 22, 2006Date of Patent: July 14, 2009Assignee: Uni-Charm CorporationInventors: Masashi Nakashita, Hisashi Takai
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Patent number: 7294121Abstract: Here is disclosed a pad being relatively large in its longitudinal direction and comprising a liquid-pervious topsheet, a liquid-impervious backsheet, a liquid-absorbent core interposed between these top- and backsheets and an cover sheet lying outside the backsheet and extending from an intermediate region to a rear region of the pad. The cover sheet has fixed side edge portions fixed to transversely opposite side edges of the pad, a fixed end portion fixed to a rear end portion of the pad and a free portion extending between the fixed side edge portions and the fixed end portion and let free from the pad so that a pocket opening from the side of the front region toward the side of the rear region is defined between the backsheet and the cover sheet.Type: GrantFiled: January 6, 2006Date of Patent: November 13, 2007Assignee: Uni-Charm CorporationInventors: Hikari Kawata, Masashi Nakashita, Kaori Yamauchi
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Patent number: 7156834Abstract: A disposable body fluid absorbent pad comprises a liquid-pervious topsheet, a liquid-impervious backsheet, a liquid-absorbent core interposed between these sheets and a strap adapted to pull the pad in a longitudinal direction. The strap comprises first and second straps attached to transversely opposite side edge margins of the pad, respectively, so to extend outward from an end margin of a front region. These first and second straps have inner fixed portions fixed to the topsheet, outer fixed portions fixed to the backsheet and hand-grips extending between the inner fixed portions and the outer fixed portions, respectively.Type: GrantFiled: September 24, 2003Date of Patent: January 2, 2007Assignee: Uni-Charm CorporationInventors: Hikari Kawata, Masashi Nakashita, Kaori Yamauchi
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Publication number: 20060293633Abstract: A body fluid absorbent wearing article includes a liquid-absorbent panel. The panel is composed of a first fibrous assembly panel lying on the side of a topsheet and a second fibrous assembly panel underlying the first sub-panel. The first sub-panel has a flat portion, a plurality of protuberant portions and a plurality of wall portions. The first fibrous assembly sub-panel has a fiber density lower than that of the second fibrous assembly sub-panel whereas the fiber density of the first fibrous assembly sub-panel is higher in the protuberant portions and the wall portions than in the flat portion. The panel thus formed is capable of rapidly spreading body fluids and preventing the body fluids from flowing back to a top surface of the article.Type: ApplicationFiled: August 7, 2006Publication date: December 28, 2006Applicant: Uni-Charm CorporationInventor: Masashi NAKASHITA
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Patent number: 7154020Abstract: A body fluid absorbent wearing article includes a liquid-absorbent panel. The panel is composed of a first fibrous assembly panel lying on the side of a topsheet and a second fibrous assembly panel underlying the first sub-panel. The first sub-panel has a flat portion, a plurality of protuberant portions and a plurality of wall portions. The first sub-panel has a fiber density that increases toward the second sub-panel which has a fiber density higher than that of the first panel.Type: GrantFiled: December 21, 2001Date of Patent: December 26, 2006Assignee: Uni-Charm CorporationInventor: Masashi Nakashita
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Publication number: 20060280900Abstract: A water-absorbent structure comprises an assembly of thermoplastic synthetic fibers, cellulose-based fibers, super-absorbent polymer and water-pervious sheets wrapping these components together. The assembly is a honeycomb construction having a plurality of through-holes and normally in a compressed state. Upon water permeation into the water-absorbent structure, the super-absorbent polymer is swollen and softened and the assembly is swollen so that the through-holes restore the initial state before the assembly has been compressed.Type: ApplicationFiled: August 22, 2006Publication date: December 14, 2006Inventors: Masashi Nakashita, Hisashi Takai
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Patent number: 7135215Abstract: A water-absorbent structure comprises an assembly of thermoplastic synthetic fibers, cellulose-based fibers, super-absorbent polymer and water-pervious sheets wrapping these components together. The assembly is a honeycomb construction having a plurality of through-holes and normally in a compressed state. Upon water permeation into the water-absorbent structure, the super-absorbent polymer is swollen and softened and the assembly is swollen so that the through-holes restore the initial state before the assembly has been compressed.Type: GrantFiled: June 24, 2003Date of Patent: November 14, 2006Assignee: Uni-Charm CorporationInventors: Masashi Nakashita, Hisashi Takai
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Publication number: 20060111685Abstract: Here is disclosed a pad being relatively large in its longitudinal direction and comprising a liquid-pervious topsheet, a liquid-impervious backsheet, a liquid-absorbent core interposed between these top- and backsheets and an cover sheet lying outside the backsheet and extending from an intermediate region to a rear region of the pad. The cover sheet has fixed side edge portions fixed to transversely opposite side edges of the pad, a fixed end portion fixed to a rear end portion of the pad and a free portion extending between the fixed side edge portions and the fixed end portion and let free from the pad so that a pocket opening from the side of the front region toward the side of the rear region is defined between the backsheet and the cover sheet.Type: ApplicationFiled: January 6, 2006Publication date: May 25, 2006Inventors: Hikari Kawata, Masashi Nakashita, Kaori Yamauchi
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Patent number: 7015370Abstract: A wearing article absorption of body fluids has an inner sheet, an outer sheet and a body fluid absorbent first panel underlying the inner sheet. The inner sheet and the first panel are formed in central regions thereof with a void to be filled with a hydrophobic second panel which is elastically compressible and liquid-pervious. A plurality of narrow strips, each comprising water-absorbent fibers compressed to a high density, and a hydrophobic and liquid-pervious spacer member underlying the narrow strips are interposed between the second panel and the outer sheet.Type: GrantFiled: August 4, 2003Date of Patent: March 21, 2006Assignee: Uni-Charm CorporationInventors: Maki Watanabe, Miou Suzuki, Masashi Nakashita
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Publication number: 20040064123Abstract: A disposable body fluid absorbent pad comprises a liquid-pervious topsheet, a liquid-impervious backsheet, a liquid-absorbent core interposed between these sheets and a strap adapted to pull the pad in a longitudinal direction. The strap comprises first and second straps attached to transversely opposite side edge margins of the pad, respectively, so to extend outward from an end margin of a front region. These first and second straps have inner fixed portions fixed to the topsheet, outer fixed portions fixed to the backsheet and hand-grips extending between the inner fixed portions and the outer fixed portions, respectively.Type: ApplicationFiled: September 24, 2003Publication date: April 1, 2004Inventors: Hirkari Kawata, Masashi Nakashita, Kaori Yamauchi
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Publication number: 20040064124Abstract: Here is disclosed a pad being relatively large in its longitudinal direction and comprising a liquid-pervious topsheet, a liquid-impervious backsheet, a liquid-absorbent core interposed between these top- and backsheets and an cover sheet lying outside the backsheet and extending from an intermediate region to a rear region of the pad. The cover sheet has fixed side edge portions fixed to transversely opposite side edges of the pad, a fixed end portion fixed to a rear end portion of the pad and a free portion extending between the fixed side edge portions and the fixed end portion and let free from the pad so that a pocket opening from the side of the front region toward the side of the rear region is defined between the backsheet and the cover sheet.Type: ApplicationFiled: September 24, 2003Publication date: April 1, 2004Inventors: Hikari Kawata, Masashi Nakashita, Kaori Yamauchi
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Patent number: 6706943Abstract: A body fluid absorbent panel including fibers containing hydrophilic fibers by 80-100% by weight and superabsorbent polymer particles contains heat-fusible fibers which are fused to intertwine the fibers and thereby to form a three-dimensional network structure wherein the high absorption polymer particles are held between respective pairs of the adjacent fibers or bonded to the fibers by means of binder, and thereby falling off of the polymer particles can be prevented and the absorption efficiency can be improved.Type: GrantFiled: October 18, 2001Date of Patent: March 16, 2004Assignee: Uni-Charm CorporationInventors: Kazuaki Onishi, Masashi Nakashita
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Publication number: 20040030313Abstract: A wearing article absorption of body fluids has an inner sheet, an outer sheet and a body fluid absorbent first panel underlying the inner sheet. The inner sheet and the first panel are formed in central regions thereof with a void to be filled with a hydrophobic second panel which is elastically compressible and liquid-pervious. A plurality of narrow strips, each comprising water-absorbent fibers compressed to a high density, and a hydrophobic and liquid-pervious spacer member underlying the narrow strips are interposed between the second panel and the outer sheet.Type: ApplicationFiled: August 4, 2003Publication date: February 12, 2004Inventors: Maki Watanabe, Miou Suzuki, Masashi Nakashita