Patents by Inventor Shinichi Okajima
Shinichi Okajima 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: 11629441Abstract: Provided is a cellulose fiber nonwoven fabric with compacted parts that is beautiful even when dry. The cellulose fiber nonwoven fabric is characterized in that: the fabric has compacted parts; the percentage of recesses due to the compacting is 9-25%; the transverse rupture strength is at least 15 N; the transmittance of the compacted parts when dry is 3-25%; and the fabric weight is 30 g/m2 to 110 g/m2.Type: GrantFiled: March 28, 2018Date of Patent: April 18, 2023Assignee: Asahi Kasei Kabushiki KaishaInventors: Chihiro Masuda, Takayuki Ogawa, Shinichi Okajima
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Publication number: 20210115604Abstract: Provided is a cellulose fiber nonwoven fabric with compacted parts that is beautiful even when dry. The cellulose fiber nonwoven fabric is characterized in that: the fabric has compacted parts; the percentage of recesses due to the compacting is 9-25%; the transverse rupture strength is at least 15 N; the transmittance of the compacted parts when dry is 3-25%; and the fabric weight is 30 g/m2 to 110 g/m2.Type: ApplicationFiled: March 28, 2018Publication date: April 22, 2021Applicant: Asahi Kasei Kabushiki KaishaInventors: Chihiro Masuda, Takayuki Ogawa, Shinichi Okajima
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Publication number: 20170002488Abstract: Provided is a noise-absorbing sheet that is highly effective at absorbing noise from magnetic and/or electric fields, the noise-absorbing effect being effective in wider bandwidths. A noise-absorbing sheet upon which at least two layers are stacked, wherein the noise absorbing sheet is characterized in that a magnetic layer containing a magnetic material and a layer of a noise-absorbing fabric in which a metal is deposited on constituent fibers are layered on said sheet, and the common logarithmic value of the surface resistivity of at least one side of the noise-absorbing fabric is 0 to 6.Type: ApplicationFiled: November 21, 2014Publication date: January 5, 2017Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Tomoya TANAKA, Chie OKAMURA, Shinichi OKAJIMA, Tomoyuki KAWAMURA, Kazufumi KATO
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Patent number: 9461290Abstract: Provided is a separator which shows excellent performance in electric insulation, electrolyte-holding property and ion- or electron-permeability and which can be stably manufactured. The separator is configured from a laminate non-woven fabric consisting of at least two layers, said layers including a non-woven fabric layer (layer I) that comprises a synthetic fiber having a fiber size of 0.1 ?m or greater and less than 4.0 ?m and a non-woven fabric layer (layer II) that comprises a thermoplastic resin fiber having a fiber size of 4.0-30.0 ?m inclusive, and has a weight per area of 3.0 g/m2 or greater and less than 20.0 g/m2.Type: GrantFiled: April 4, 2013Date of Patent: October 4, 2016Assignee: ASAHI KASEI FIBERS CORPORATIONInventors: Yusuke Yamada, Junichi Kusakabe, Rumina Obi, Shinichi Okajima, Kazufumi Kato
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Publication number: 20150171397Abstract: Provided is a separator which shows excellent performance in electric insulation, electrolyte-holding property and ion- or electron-permeability and which can be stably manufactured. The separator is configured from a laminate non-woven fabric consisting of at least two layers, said layers including a non-woven fabric layer (layer I) that comprises a synthetic fiber having a fiber size of 0.1 ?m or greater and less than 4.0 ?m and a non-woven fabric layer (layer II) that comprises a thermoplastic resin fiber having a fiber size of 4.0-30.0 ?m inclusive, and has a weight per area of 3.0 g/m2 or greater and less than 20.0 g/m2.Type: ApplicationFiled: April 4, 2013Publication date: June 18, 2015Applicant: ASAHI KASEI FIBERS CORPORATIONInventors: Yusuke Yamada, Junichi Kusakabe, Rumina Obi, Shinichi Okajima, Kazufumi Kato
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Patent number: 6916535Abstract: The present invention provides a poly(trimethylene terephthalate) pellet comprising 80 wt % or more of trimethylene terephthalate repeating units copolymerized with bis(3-hydroxypropyl) ether at a ratio in a range from 0.01 to 2 wt %, wherein an amount of terminal carboxyl groups is 25 milli-equivalent/kg or less and an intrinsic viscosity is in a range from 0.8 to 2 dl/g, which pellet has an L* value of 75 or more, a b* value in a range from ?2 to 5, and a weight in a range from 1 to 50 mg/piece.Type: GrantFiled: April 29, 2002Date of Patent: July 12, 2005Assignee: Asahi Kasei Kabushiki KaishaInventors: Shinichi Okajima, Jinichiro Kato, Katsuhiro Fujimoto
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Patent number: 6645619Abstract: The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weight. The fiber of the present invention is high in toughness, excellent in whiteness and dyeable with a cationic dye, whereby it is useful for clothing, carpets or non-woven sheets, etc.Type: GrantFiled: June 12, 2002Date of Patent: November 11, 2003Assignee: Asahi Kasei Kabushiki KaishaInventors: Jinichiro Kato, Tetsuko Takahashi, Shinichi Okajima, Katsuhiro Fujimoto, Kenji Imura
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Publication number: 20030092874Abstract: The present invention provides a poly(trimethylene terephthalate) pellet comprising 80 wt % or more of trimethylene terephthalate repeating units copolymerized with bis (3-hydroxypropyl) ether at a ratio in a range from 0.01 to 2 wt %, wherein an amount of terminal carboxyl groups is 25 milli-equivalent/kg or less and an intrinsic viscosity is in a range from 0.8 to 2 dl/g, which pellet has an L* value of 75 or more, a b* value in a range from −2 to 5, and a weight in a range from 1 to 50 mg/piece.Type: ApplicationFiled: April 29, 2002Publication date: May 15, 2003Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Shinichi Okajima, Jinichiro Kato, Katsuhiro Fujimoto
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Publication number: 20030065105Abstract: The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weight. The fiber of the present invention is high in toughness, excellent in whiteness and dyeable with a cationic dye, whereby it is useful for clothing, carpets or non-woven sheets, etc.Type: ApplicationFiled: June 12, 2002Publication date: April 3, 2003Inventors: Jinichiro Kato, Tetsuko Takahashi, Shinichi Okajima, Katsuhiro Fujimoto, Kenji Imura
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Patent number: 5922445Abstract: A sheet-like composite material which is obtained by coating or impregnating a fibrous base material with an elastic polymeric substance, in which the fibers constituting the fibrous base material and the elastic polymeric substance are prevented from bonding with each other, and which is extremely flexible and has excellent wear resistance and an extremely high peel strength, which material may be produced for example by applying a hydrophobicizing treatment to the fibrous base material, then impregnating or coating a solution of the elastic polymeric substance to which a hydrophilic silicone has been added, and wet solidifying.Type: GrantFiled: June 14, 1995Date of Patent: July 13, 1999Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Minoru Yoshida, Shinichi Okajima, Minoru Fukui