Patents by Inventor Yoshihisa Kawakami
Yoshihisa Kawakami 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: 9856591Abstract: There is provided a nonwoven fabric excellent in the balance among fuzz resistance, softness and tensile strength. The nonwoven fabric comprises an embossed portion and a non-embossed portion; the embossed portion comprising an emboss pattern that comprises unit patterns each delimited by emboss lines; the emboss lines each comprising a plurality of emboss element parts that are continuously arranged with a predetermined interval; wherein in the direction in which the distance from any arbitrarily-defined point in the non-embossed portion within the unit pattern toward the outside of the emboss lines that delimit the non-embossed portion is shortest, at least one of the plurality of emboss element parts is disposed so as to block the direction in which the distance from the arbitrarily-defined point toward the outside of the emboss lines that delimit the non-embossed portion is shortest.Type: GrantFiled: March 9, 2011Date of Patent: January 2, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Taro Ichikawa, Yoshihisa Kawakami
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Patent number: 9611568Abstract: It is an object of the present invention to obtain crimped conjugated fibers having excellent crimp properties. The present invention provides a crimped conjugated fiber having a crimpable cross-sectional configuration, wherein a cross section of the fiber includes at least two portions: a portion (a) and a portion (b); the portion (a) includes an olefin polymer (A) and the portion (b) includes an olefin polymer (B); the olefin polymer (A) differs from the olefin polymer (B) in at least any one of Mz/Mw, melting point and MFR; and a specific fatty acid amide is added to the olefin polymer (A) and/or the olefin polymer (B). The present invention also provides a non-woven fabric including said crimped conjugated fiber.Type: GrantFiled: May 10, 2012Date of Patent: April 4, 2017Assignee: MITSUI CHEMICALS, INC.Inventors: Yoshihisa Kawakami, Kenichi Suzuki, Yoshihiko Tomita
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Publication number: 20150233031Abstract: The object of the present invention is to provide a polypropylene spunbond nonwoven fabric excellent in its flexibility, bending resistance, texture and strength. A spunbond nonwoven fabric of the present invention is made of a propylene polymer composition containing a propylene polymer (A) having a melting point of not less than 120° C. and a fatty acid amide having not less than 15 and not more than 21 carbon atoms. An oleic acid amide is preferred as the fatty acid amide having not less than 15 and not more than 21 carbon atoms. Preferably, the propylene polymer composition further contains a propylene polymer (B) having a melting point of less than 120° C.Type: ApplicationFiled: September 26, 2013Publication date: August 20, 2015Applicant: MITSUI CHEMICALS, INC.Inventors: Naosuke Kunimoto, Kenichi Suzuki, Yoshihisa Kawakami, Kosuke Ota
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Patent number: 9074303Abstract: It is an object of the present invention to develop a polypropylene nonwoven fabric which is excellent in both of initial hydrophilicity and long-lasting hydrophilicity, that is, which is excellent in initial hydrophilicity that the nonwoven fabric exhibits hydrophilicity in a short time after it is produced and long-lasting hydrophilicity that the nonwoven fabric recovers hydrophilicity in a short time even if it is subjected to heat treatment. The present invention provides fibers of a propylene copolymer composition which comprises 100 parts by weight of a propylene/?-olefin random copolymer having a melting point (Tm) of 125 to 155° C. and 0.5 to 5 parts by weight of a nonionic surface active agent comprising an alkylene oxide adduct of an aliphatic alcohol.Type: GrantFiled: August 18, 2009Date of Patent: July 7, 2015Assignee: MITSUI CHEMICALS, INC.Inventors: Kazuhiko Masuda, Yoshihisa Kawakami, Hisashi Morimoto
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Publication number: 20140066873Abstract: It is an object of the present invention to obtain crimped conjugated fibers having excellent crimp properties. The present invention provides a crimped conjugated fiber having a crimpable cross-sectional configuration, wherein a cross section of the fiber includes at least two portions: a portion (a) and a portion (b); the portion (a) includes an olefin polymer (A) and the portion (b) includes an olefin polymer (B); the olefin polymer (A) differs from the olefin polymer (B) in at least any one of Mz/Mw, melting point and MFR; and a specific fatty acid amide is added to the olefin polymer (A) and/or the olefin polymer (B). The present invention also provides a non-woven fabric including said crimped conjugated fiber.Type: ApplicationFiled: May 10, 2012Publication date: March 6, 2014Applicant: MITSUI CHEMICALS, INC.Inventors: Yoshihisa Kawakami, Kenichi Suzuki, Yoshihiko Tomita
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Publication number: 20120322329Abstract: A fiber comprising an olefin polymer composition including, based on 100 parts by weight of an olefin polymer, 0.5 to 5 parts by weight of a di-fatty acid ester of a poly(oxyalkylene)diol represented by formula (1) described below and 0.01 to 2.5 parts by weight of a poly(oxyalkylene)sorbitan tri-fatty acid ester (the alkylene group being ethylene, propylene or butylene group, the number of added moles being 10 to 40, and the fatty acid being an alkyl or alkylene fatty acid having a carbon number of 12 to 18). R1—COO—(CnH2nO)a—C6H12—O(CnH2nO)b—CO—R2 . . . (Formula 1) [wherein R1 and R2 represent an alkyl group having a carbon number of 11 to 17 and may be the same or different, n in (CnH2nO)a and (CnH2nO)b is an integer of 2 to 4, and a+b is 5 to 23]. The fiber can provide reduced smoke emission during production of a nonwoven fabric.Type: ApplicationFiled: March 11, 2011Publication date: December 20, 2012Applicant: MITSUI CHEMICALS, INCInventors: Taro Ichikawa, Yoshihisa Kawakami, Yoshihiko Tomita
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Publication number: 20120315440Abstract: There is provided a nonwoven fabric excellent in the balance among fuzz resistance, softness and tensile strength. The nonwoven fabric comprises an embossed portion and a non-embossed portion; the embossed portion comprising an emboss pattern that comprises unit patterns each delimited by emboss lines; the emboss lines each comprising a plurality of emboss element parts that are continuously arranged with a predetermined interval; wherein in the direction in which the distance from an arbitrarily-defined point in the non-embossed portion within the unit pattern toward the outside of the emboss lines that delimit the non-embossed portion is shortest, at least one of the plurality of emboss element parts is disposed so as to block the direction in which the distance from the arbitrarily-defined point toward the outside of the emboss lines that delimit the non-embossed portion is shortest.Type: ApplicationFiled: March 9, 2011Publication date: December 13, 2012Inventors: Taro Ichikawa, Yoshihisa Kawakami
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Publication number: 20110189917Abstract: It is an object of the present invention to develop a polypropylene nonwoven fabric which is excellent in both of initial hydrophilicity and long-lasting hydrophilicity, that is, which is excellent in initial hydrophilicity that the nonwoven fabric exhibits hydrophilicity in a short time after it is produced and long-lasting hydrophilicity that the nonwoven fabric recovers hydrophilicity in a short time even if it is subjected to heat treatment. The present invention provides fibers of a propylene copolymer composition which comprises 100 parts by weight of a propylene/?-olefin random copolymer having a melting point (Tm) of 125 to 155° C. and 0.5 to 5 parts by weight of a nonionic surface active agent comprising an alkylene oxide adduct of an aliphatic alcohol.Type: ApplicationFiled: August 18, 2009Publication date: August 4, 2011Applicant: MITSUI CHEMICALS, INC.Inventors: Kazuhiko Masuda, Yoshihisa Kawakami, Hisashi Morimoto
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Publication number: 20100255255Abstract: There is provided a sheet for barrier leg cuffs for use in absorbent products, such as disposal diapers. The sheet has excellent air permeability and is highly effective in preventing the leakage of loose feces. The sheet for barrier leg cuffs is made from a continuous-fiber nonwoven fabric having a ratio of thickness to basis weight equal to or higher than 0.015 mm/(g/m2). Preferably, the sheet for barrier leg cuffs is made from a continuous-fiber nonwoven fabric containing a fiber mixture of thermoplastic elastomer continuous fiber and extensible continuous fiber. The sheet for barrier leg cuffs according to the present invention has air permeability, is highly effective in preventing the leakage of loose feces, and is flexible and hence excellent in terms of feel against skin; thus, it can be suitably used in barrier leg cuffs of disposable diapers, sanitary products, and other absorbent products.Type: ApplicationFiled: November 12, 2008Publication date: October 7, 2010Applicant: Mitsui Chemicals Inc.Inventors: Yoshihisa Kawakami, Akio Matsubara
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Patent number: 6960702Abstract: The present invention is directed to a disposable absorbent article. The disposable absorbent article of the present invention includes a fluid storage layer disposed between the topsheet and backsheet and having a body-facing surface and a garment-facing surface opposing the body-facing surface. The fluid storage layer contains a superabsorbent material. The disposable absorbent article further includes an odor reduction layer disposed at either the body-facing surface side or the body-facing surface side of the fluid storage layer. The odor reduction layer contains a metalphthalocyanine material. The disposable absorbent article further includes an isolation means disposed between the superabsorbent material and the odor reduction layer for isolating the metalphthalocyanine material from contacting at least a part of the superabsorbent material.Type: GrantFiled: October 5, 2000Date of Patent: November 1, 2005Assignee: The Procter & Gamble CompanyInventors: Yoshihisa Kawakami, Vijay Rajagopalan, Kimio Ueda, Ebranim Rezai
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Publication number: 20050159067Abstract: The present invention is to provide a hydrophilic nonwoven fabric which can reveal hydrophilicity even after exposure to high temperature. The hydrophilic nonwoven fabric comprising an olefinic polymer containing a hydrophilic agent is characterized in that hydrophilicity can be revealed after heating treatment for an hour at 60° C. The nonwoven fabric is manufactured by using an olefinic polymer (B) and a master batch where a hydrophilic agent is included in an olefinic polymer (A), wherein an MFR (melt flow rate) of a master batch is preferably the same as or lower than the MFR of an olefinic polymer composition forming the nonwoven fabric.Type: ApplicationFiled: November 5, 2004Publication date: July 21, 2005Applicant: Mitsui Chemicals, Inc.Inventors: Naosuke Kunimoto, Yoshihisa Kawakami
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Publication number: 20050159719Abstract: The present invention is directed to a disposable absorbent article. The disposable absorbent article of the present invention includes a fluid storage layer disposed between the topsheet and backsheet and having a body-facing surface and a garment-facing surface opposing the body-facing surface. The fluid storage layer contains a superabsorbent material. The disposable absorbent article further includes an odor reduction layer disposed at either the body-facing surface side or the body-facing surface side of the fluid storage layer. The odor reduction layer contains a metalphthalocyanine material. The disposable absorbent article further includes an isolation means disposed between the superabsorbent material and the odor reduction layer for isolating the metalphthalocyanine material from contacting at least a part of the superabsorbent material.Type: ApplicationFiled: March 14, 2005Publication date: July 21, 2005Inventors: Yoshihisa Kawakami, Vijay Rajagopalan, Kimio Ueda, Ebrahim Rezai
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Patent number: 5795374Abstract: A coating composition comprising a rosin compound, a polymer containing organosilyl ester groups, and an antifoulant as essential components is disclosed. This rosin-based coating composition gives a coating film which forms no residue layer on the surface thereof over long-term immersion, is hence free from physical defects such as cracks and peeling and capable of maintaining a sufficiently high rate of film erosion and preventing the attachment of marine organisms over a long period of time has satisfactory suitability for recoating, and has the satisfactory ability to prevent marine-organism attachment over the out-fitting period.Type: GrantFiled: April 15, 1997Date of Patent: August 18, 1998Assignee: NOF CorporationInventors: Masayasu Itoh, Shigeo Fukuda, Yoshihisa Kawakami, Yoshiro Matsubara, Yasushi Kawamura, Shigeru Masuoka, Yoshihiro Honda
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Patent number: 4191432Abstract: An annular seal member secured to an outer ring is formed on its inner periphery with a highly flexible seal lip extending radially inwardly thereof along the side face of a peripheral stepped portion in the shoulder of the inner ring and spaced apart from the side face by a small clearance. The seal lip has an annular projection axially projecting from the inner side of its inner peripheral portion and lightly in contact with the side face of the stepped portion of the inner ring. The inner peripheral face of the seal lip and the peripheral bottom face of the stepped portion opposed to, and spaced apart by a small clearance from, the inner peripheral face are tapered axially inwardly of the inner ring. The tapered inner peripheral face of the seal lip is not greater than the tapered bottom face of the stepped portion in axial length. The bearing has improved dustproofness, leakproofness and rotation performance afforded by the seal assembly.Type: GrantFiled: October 12, 1978Date of Patent: March 4, 1980Assignee: Koyo Seiko Company LimitedInventors: Toshio Miki, Yoshiki Fujita, Yoshihisa Kawakami