Patents by Inventor Keitaro Ameyama
Keitaro Ameyama 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: 10811659Abstract: An object is to provide a separator excellent in adhesiveness to electrodes and a separator for an electricity storage device also excellent in handling performance. A separator for an electricity storage device having a polyolefin microporous film and a thermoplastic polymer coating layer covering at least a part of at least one of surfaces of the polyolefin microporous film, in which the thermoplastic polymer coating layer, on the polyolefin microporous film, has a portion containing a thermoplastic polymer and a portion not containing the thermoplastic polymer in a sea-island configuration, the thermoplastic polymer coating layer contains the thermoplastic polymer having at least two glass-transition temperatures, at least one of the glass-transition temperatures is in a range of less than 20° C. and at least one of the glass-transition temperatures is in a range of 20° C. or more.Type: GrantFiled: November 2, 2018Date of Patent: October 20, 2020Assignee: Asahi Kasei E-materials CorporationInventors: Hiroshi Miyazawa, Keitaro Ameyama, Takashi Shuto
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Patent number: 10680223Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: GrantFiled: May 5, 2016Date of Patent: June 9, 2020Assignee: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Patent number: 10361415Abstract: A separator for electricity storage devices which comprises: a base comprising a porous film; and a thermoplastic polymer arranged on at least one surface of the base. The thermoplastic polymer has a dispersion (?2), defined by the following numerical equation using the areas (Si) of Voronoi polygons obtained by Voronoi tessellation, of 0.01-0.7. (In the equation, Si is the measured area of each Voronoi polygon, m is an average of the measured areas of the Voronoi polygons, and n is the total number of the Voronoi polygons).Type: GrantFiled: March 3, 2015Date of Patent: July 23, 2019Assignee: Asahi Kasei Kabushiki KaishaInventors: Keitaro Ameyama, Hiroshi Miyazawa, Satoshi Hashimoto, Masatoshi Ikemi, Koichiro Azuma, Kimio Imaizumi
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Publication number: 20190140242Abstract: An object is to provide a separator excellent in adhesiveness to electrodes and a separator for an electricity storage device also excellent in handling performance. A separator for an electricity storage device having a polyolefin microporous film and a thermoplastic polymer coating layer covering at least a part of at least one of surfaces of the polyolefin microporous film, in which the thermoplastic polymer coating layer, on the polyolefin microporous film, has a portion containing a thermoplastic polymer and a portion not containing the thermoplastic polymer in a sea-island configuration, the thermoplastic polymer coating layer contains the thermoplastic polymer having at least two glass-transition temperatures, at least one of the glass-transition temperatures is in a range of less than 20° C. and at least one of the glass-transition temperatures is in a range of 20° C. or more.Type: ApplicationFiled: November 2, 2018Publication date: May 9, 2019Applicant: Asahi Kasei E-materials CorporationInventors: Hiroshi Miyazawa, Keitaro Ameyama, Takashi Shuto
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Patent number: 10153473Abstract: An object is to provide a separator excellent in adhesiveness to electrodes and a separator for an electricity storage device also excellent in handling performance. A separator for an electricity storage device having a polyolefin microporous film and a thermoplastic polymer coating layer covering at least a part of at least one of surfaces of the polyolefin microporous film, in which the thermoplastic polymer coating layer, on the polyolefin microporous film, has a portion containing a thermoplastic polymer and a portion not containing the thermoplastic polymer in a sea-island configuration, the thermoplastic polymer coating layer contains the thermoplastic polymer having at least two glass-transition temperatures, at least one of the glass-transition temperatures is in a range of less than 20° C. and at least one of the glass-transition temperatures is in a range of 20° C. or more.Type: GrantFiled: July 26, 2013Date of Patent: December 11, 2018Assignee: Asahi Kasei E-materials CorporationInventors: Hiroshi Miyazawa, Keitaro Ameyama, Takashi Shuto
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Patent number: 9966583Abstract: Disclosed is a laminated polyolefin microporous membrane having a two-type three-layer structure in which first polyolefin microporous layers are surface layers and a second polyolefin microporous layer is an intermediate layer which is different from the first polyolefin microporous layer, in which at least one of the first polyolefin microporous layers and the second polyolefin microporous layer comprises a polypropylene-based resin in which a mass ratio of polypropylene to propylene copolymer is 0 or more and 2.29 or less, and a melting point of the polypropylene copolymer is 120° C. or higher and 145° C. or lower. Also disclosed is a method of making the same.Type: GrantFiled: June 11, 2014Date of Patent: May 8, 2018Assignee: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Patent number: 9882190Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: GrantFiled: June 11, 2014Date of Patent: January 30, 2018Assignee: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Patent number: 9853272Abstract: The disclosure provides a laminated polyolefin microporous membrane having propylene-?-olefin copolymer and methods of producing the same. The laminated polyolefin microporous membrane has a two-type three layer structure in which first polyolefin microporous layers are surface layers and a second polyolefin microporous layer is an intermediate layer which is different from the first polyolefin microporous layer.Type: GrantFiled: June 11, 2014Date of Patent: December 26, 2017Assignee: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Publication number: 20170263907Abstract: A separator for electricity storage devices which comprises: a base comprising a porous film; and a thermoplastic polymer arranged on at least one surface of the base. The thermoplastic polymer has a dispersion (?2), defined by the following numerical equation using the areas (Si) of Voronoi polygons obtained by Voronoi tessellation, of 0.01-0.7. (In the equation, Si is the measured area of each Voronoi polygon, m is an average of the measured areas of the Voronoi polygons, and n is the total number of the Voronoi polygons.Type: ApplicationFiled: March 3, 2015Publication date: September 14, 2017Applicant: Asahi Kasei Kabushiki KaishaInventors: Keitaro Ameyama, Hiroshi Miyazawa, Satoshi Hashimoto, Masatoshi Ikemi, Koichiro Azuma, Kimio Imaizumi
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Publication number: 20160254513Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: ApplicationFiled: May 5, 2016Publication date: September 1, 2016Applicant: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Laminated separator including inorganic particle and polyolefin layer for electricity storage device
Patent number: 9356275Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: GrantFiled: March 9, 2010Date of Patent: May 31, 2016Assignee: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara -
Publication number: 20150188108Abstract: An object is to provide a separator excellent in adhesiveness to electrodes and a separator for an electricity storage device also excellent in handling performance. A separator for an electricity storage device having a polyolefin microporous film and a thermoplastic polymer coating layer covering at least a part of at least one of surfaces of the polyolefin microporous film, in which the thermoplastic polymer coating layer, on the polyolefin microporous film, has a portion containing a thermoplastic polymer and a portion not containing the thermoplastic polymer in a sea-island configuration, the thermoplastic polymer coating layer contains the thermoplastic polymer having at least two glass-transition temperatures, at least one of the glass-transition temperatures is in a range of less than 20° C. and at least one of the glass-transition temperatures is in a range of 20° C. or more.Type: ApplicationFiled: July 26, 2013Publication date: July 2, 2015Applicant: ASAHI KASEI E-MATERIALS CORPORATIONInventors: Hiroshi Miyazawa, Keitaro Ameyama, Takashi Shuto
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Publication number: 20140335396Abstract: A microporous membrane having a polyolefin microporous membrane and a surfactant adhering to the polyolefin microporous membrane, wherein the surfactant includes a surfactant (A) having a solubility in 100 g of water of 5 g or more and a surfactant (B) having a solubility in 100 g of water of less than 0.1 g, the surfactants (A) and (B) are adhered in an amount of 1 to 40% by mass in total based on 100% by mass of the polyolefin microporous membrane, and the polyolefin microporous membrane has a tortuosity factor of more than 2.0.Type: ApplicationFiled: September 26, 2012Publication date: November 13, 2014Applicant: ASAHI KASEI E-MATERIALS CORPORATIONInventors: Takeshi Onizawa, Hisashi Takeda, Keitaro Ameyama
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Publication number: 20140329127Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: ApplicationFiled: June 11, 2014Publication date: November 6, 2014Applicant: Asahi Kasei E-materials CorporationInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Publication number: 20140329129Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: ApplicationFiled: June 11, 2014Publication date: November 6, 2014Applicant: ASAHI KASEI E-MATERIALS CORPORATIONInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Publication number: 20140329128Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: ApplicationFiled: June 11, 2014Publication date: November 6, 2014Applicant: ASAHI KASEI E-MATERIALS CORPORATIONInventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara
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Publication number: 20120015229Abstract: Disclosed is a laminated separator including a first polyolefin microporous layer and a second polyolefin microporous layer which is laminated on the first polyolefin microporous layer and which is different from the first polyolefin microporous layer, wherein at least one of the first microporous layer and the second microporous layer includes an inorganic particle having a primary particle size of 1 nm or more and 80 nm or less.Type: ApplicationFiled: March 9, 2010Publication date: January 19, 2012Inventors: Masahiro Ohashi, Keitaro Ameyama, Yuzuru Sakakibara