Patents by Inventor Masatoshi Ohkura
Masatoshi Ohkura 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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Publication number: 20130316246Abstract: A porous film that excels when used as a separator for a lithium-ion battery not only in separator followability to expansion and contraction of an electrode during charging and discharging, but also in charging and discharging cycle characteristics. The porous film, when the thickness of a circular region having a diameter of 10 mm as an initial thickness t0 after a load of 50 g is applied onto the circular region for 10 seconds, as a thickness t after a load of 500 g is subsequently applied onto the same region for 10 seconds, and as a thickness t1 after 10 seconds has passed after the load applied onto the same region is subsequently changed to 50 g, the thickness change rate is 10% to 50%, and the thickness (t1) recovery rate is 80% to 99.9%.Type: ApplicationFiled: February 2, 2012Publication date: November 28, 2013Applicant: Toray Industries, Inc.Inventors: Soichi Fujimoto, Takuya Kuma, Masatoshi Ohkura
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Publication number: 20130316247Abstract: A porous polypropylene film includes a polypropylene resin and a ?-crystal nucleating agent, in which a temperature at which a heat shrinkage rate of a dimension in the width direction of the film is 5% is 130 to 200° C., air permeation resistance is 50 to 500 sec/100 ml, porosity is 35 to 70%, and when porosity is ? and air permeation resistance is G, both satisfy expression (1): G+15×??1,200 ??(1).Type: ApplicationFiled: February 2, 2012Publication date: November 28, 2013Applicant: Toray Industries, Inc.Inventors: Takuya Kuma, Soichi Fujimoto, Masatoshi Ohkura
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Publication number: 20130310503Abstract: It is aimed to provide a polyarylene sulfide film for an acoustic instrument vibrating plate excellent in heat resistance, molding processability, acoustic properties, and also heat moldability. Provided is a polyarylene sulfide film wherein the elongation at break in either a longitudinal direction or a width direction of the film is 100% or more and 250% or less, and the Young's modulus in either a longitudinal direction or a width direction of the film is 1.5 GPa or more and less than 4 GPa.Type: ApplicationFiled: December 19, 2012Publication date: November 21, 2013Applicant: TORAY INDUSTRIES, INC.Inventors: Tetsuya MACHIDA, Yasuyuki IMANISHI, Masatoshi OHKURA, Takuji HIGASHIOJI
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Patent number: 8512828Abstract: A biaxially oriented white polypropylene film containing a core layer (layer A) and a skin layer (layer B), said layer B is laminated at least on one surface of said layer A, wherein said layer A contains a polypropylene resin having ?-crystal activity and 1 to 20 mass % particle (a) having an average dispersed diameter of 60 to 400 nm, and wherein, said layer B contains a polypropylene resin and 0.05 to 5 mass % particle (b) of an average dispersed diameter of 1 to 4 ?m. The present invention provides a biaxially oriented white polypropylene film excellent in film quality and productivity and capable of making sensitivity and productivity compatible in a high level when used as a base for a receiving sheet, and a receiving sheet for thermal transfer recording made thereof.Type: GrantFiled: May 15, 2007Date of Patent: August 20, 2013Assignee: Toray Industries, Inc.Inventors: Shigeru Tanaka, Junichi Masuda, Masatoshi Ohkura, Tatsuya Itou
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Patent number: 8491991Abstract: A microporous polypropylene film where film formability is improved in accordance with a ?-crystal technique which allows microporous films to be continuously manufactured at low cost is disclosed. In addition, a microporous polypropylene film of which the specific gravity is further reduced is provided. Furthermore, a microporous polypropylene film with a significantly high permeability is provided. In addition, manufacturing methods for these microporous polypropylene films are provided.Type: GrantFiled: April 21, 2005Date of Patent: July 23, 2013Assignee: Toray Industries, Inc.Inventors: Jun'ichi Masuda, Masatoshi Ohkura, Shigeru Tanaka, Reiko Morita, Hajime Fukushima
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Patent number: 8349974Abstract: A biaxially oriented polyarylene sulfide film which has an excellent elongation at break and flatness is provided. The biaxially oriented film may be a biaxially oriented polyarylene sulfide film which is substantially composed of a polyarylene sulfide resin (A), wherein one of the elongations at break in the machine direction and in the transverse direction of the film is not lower than 110%; one of the breaking stresses in the machine direction and in the transverse direction of the film of the film is not higher than 200 MPa; and both of the heat shrinkage ratio in the machine direction of the film and that in the transverse direction of the film at 260° C. for 10 minutes are not less than 0% and not more than 10%.Type: GrantFiled: May 7, 2008Date of Patent: January 8, 2013Assignee: Toray Industries, Inc.Inventors: Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi
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Publication number: 20120219864Abstract: A porous film has an absorbing height of an electrolysis solution of 10 to 60 mm in at least one direction of the film's machine direction or transverse direction, wherein the absorbing height being measured after 30 minutes from the start of the absorption of the electrolysis solution, and a tensile strength at break in the machine direction of not less than 65 MPa. The porous film provides a porous film that has excellent absorption properties for an electrolysis solution and, when used as a separator, exhibits excellent battery properties and workability.Type: ApplicationFiled: September 21, 2010Publication date: August 30, 2012Applicant: TORAY INDUSTRIES, INC.Inventors: Kei Ikoma, Takuya Kuma, Masatoshi Ohkura
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Publication number: 20120189815Abstract: A porous polypropylene film roll of which a porous polypropylene film includes a polypropylene resin and having the average value of the porosities, ?ave, of 45 to 90% is wound around a core, and the unevenness of the thickness in the film machine direction is not more than 15%. The porous polypropylene film roll has not only excellent air permeability and porosity, but also excellent thickness uniformity and, therefore, a porous polypropylene film roll which can efficiently utilize the performance of an electric storage device and is suitable for a separator for an electric storage device.Type: ApplicationFiled: September 13, 2010Publication date: July 26, 2012Applicant: Toray Industries, Inc.Inventors: Ryosuke Matsui, Masatoshi Ohkura, Soichi Fujimoto, Takuya Kuma
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Patent number: 8153732Abstract: A biaxially oriented polyphenylene sulfide film contains polyphenylene sulfide and polyether imide, wherein the contents of the polyphenylene sulfide and the polyether imide are 70 to 99 parts by weight and 1 to 30 parts by weight respectively when the total amount of the polyphenylene sulfide and the polyether imide is taken as 100 parts by weight, and further contains a compound having one or more groups selected from an epoxy group, an amino group and an isocyanate group as a compatibilizing agent in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the polyphenylene sulfide and polyether imide in total, and the polyether imide forms a dispersed phase with an average particle diameter of 10 to 500 nm and the biaxially oriented polyphenylene sulfide film exhibits a tensile elongation at break of 110 to 250% in both the longitudinal direction and width direction.Type: GrantFiled: May 17, 2011Date of Patent: April 10, 2012Assignee: Toray Industries, Inc.Inventors: Takuji Higashioji, Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi, Atsushi Ishio, Megumi Yamada
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Patent number: 8138279Abstract: A biaxially oriented polyarylene sulfide film made of a polyarylene sulfide resin composition has a melt crystallization temperature of not lower than 160° C. and not higher than 220° C. The biaxially oriented polyarylene sulfide film contains 70 to 99 parts by weight of the polyarylene sulfide and 1 to 30 parts by weight of thermoplastic resin A; the thermoplastic resin A constitutes a dispersed phase having an average dispersion diameter of 50 nm to 500 nm. The biaxially oriented polyarylene sulfide film has a breaking stress at 200° C. in the machine direction and/or transverse direction of not less than 30 MPa and not more than 90 MPa and has an elongation at break at 200° C. in the machine direction and/or transverse direction of not less than 100% and not more than 250%.Type: GrantFiled: May 9, 2007Date of Patent: March 20, 2012Assignee: Toray Industries, Inc.Inventors: Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi, Takuji Higashioji
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Patent number: 8089746Abstract: There are provided a microporous film for an electric storage device separator, which can increase energy density and power density when used in an electric storage device, and which is excellent in handling properties in a processing step to the electric storage device, as well as an electric storage device separator and an electric storage device, using the microporous film. Specifically, provided is a microporous film for an electric storage device separator, characterized by including a porosity of 70% or more, a strength of 40 MPa or more in a longitudinal direction, an average pore size of from 40 to 400 nm, anuclear pores, and exhibiting biaxial orientation.Type: GrantFiled: September 29, 2006Date of Patent: January 3, 2012Assignee: TORAY Industries, Inc.Inventors: Jun'ichi Masuda, Masatoshi Ohkura, Shigeru Tanaka, Hajime Fukushima
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Publication number: 20110319511Abstract: A porous polypropylene film has a number of portions where the quantity of light transmitted through each portion is not smaller than 5 times the average quantity of light transmitted through the film is 0.5 portion or less per 1 m2. The porous polypropylene film has a high porosity and excellent production characteristics, and when used as a separator in an electrical storage device, has excellent quality and few defects that could negatively impact battery performance.Type: ApplicationFiled: March 16, 2010Publication date: December 29, 2011Applicant: TORAY INDUSTRIES, INC.Inventors: Takuya Kuma, Kei Ikoma, Masatoshi Ohkura
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Publication number: 20110311856Abstract: A power storage device separator includes a polyolefin based porous film laminated on at least one side with a particle-containing layer containing cellulose based resin, inorganic particles, and thermoplastic resin particles with a melting point of 100-140° C.Type: ApplicationFiled: July 15, 2009Publication date: December 22, 2011Applicant: TORAY INDUSTRIES, INC.Inventors: Ryousuke Matsui, Masatoshi Ohkura, Kei Ikoma, Keijiro Takanishi, Takuya Kuma
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Publication number: 20110224384Abstract: A biaxially oriented polyphenylene sulfide film contains polyphenylene sulfide and polyether imide, wherein the contents of the polyphenylene sulfide and the polyether imide are 70 to 99 parts by weight and 1 to 30 parts by weight respectively when the total amount of the polyphenylene sulfide and the polyether imide is taken as 100 parts by weight, and further contains a compound having one or more groups selected from an epoxy group, an amino group and an isocyanate group as a compatibilizing agent in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the polyphenylene sulfide and polyether imide in total, and the polyether imide forms a dispersed phase with an average particle diameter of 10 to 500 nm and the biaxially oriented polyphenylene sulfide film exhibits a tensile elongation at break of 110 to 250% in both the longitudinal direction and width direction.Type: ApplicationFiled: May 17, 2011Publication date: September 15, 2011Inventors: Takuji Higashioji, Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi, Atsushi Ishio, Megumi Yamada
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Publication number: 20100209712Abstract: A biaxially oriented polyarylene sulfide film which has an excellent elongation at break and flatness is provided. The biaxially oriented film may be a biaxially oriented polyarylene sulfide film which is substantially composed of a polyarylene sulfide resin (A), wherein one of the elongations at break in the machine direction and in the transverse direction of the film is not lower than 110%; one of the breaking stresses in the machine direction and in the transverse direction of the film of the film is not higher than 200 MPa; and both of the heat shrinkage ratio in the machine direction of the film and that in the transverse direction of the film at 260° C. for 10 minutes are not less than 0% and not more than 10%.Type: ApplicationFiled: May 7, 2008Publication date: August 19, 2010Applicant: TORAY INDUSTRIES, INC.Inventors: Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi
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Publication number: 20090311501Abstract: A biaxially oriented polyarylene sulfide film is provided having an excellent heat resistance, dimensional stability, electrical properties and chemical resistance, which has an excellent heat moldability, film-forming stability and flatness brought about by the decrease in breaking stress and increase in the elongation at break at 200° C. A biaxially oriented polyarylene sulfide film made of a polyarylene sulfide resin composition having a melt crystallization temperature of not lower than 160° C. and not higher than 220° C., the biaxially oriented polyarylene sulfide film comprising 70 to 99 parts by weight of the polyarylene sulfide and 1 to 30 parts by weight of thermoplastic resin A; the thermoplastic resin A constituting a dispersed phase having an average dispersion diameter of 50 nm to 500 nm; the biaxially oriented polyarylene sulfide film having a breaking stress at 200° C.Type: ApplicationFiled: May 9, 2007Publication date: December 17, 2009Applicant: TORAY Industries, IncInventors: Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi, Takuji Higashioji
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Publication number: 20090219672Abstract: There are provided a microporous film for an electric storage device separator, which can increase energy density and power density when used in an electric storage device, and which is excellent in handling properties in a processing step to the electric storage device, as well as an electric storage device separator and an electric storage device, using the microporous film. Specifically, provided is a microporous film for an electric storage device separator, characterized by including a porosity of 70% or more, a strength of 40 MPa or more in a longitudinal direction, an average pore size of from 40 to 400 nm, anuclear pores, and exhibiting biaxial orientation.Type: ApplicationFiled: September 29, 2006Publication date: September 3, 2009Inventors: Jun'ichi Masuda, Masatoshi Ohkura, Shigeru Tanaka, Hajime Fikushima
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Publication number: 20090208676Abstract: A biaxially oriented white polypropylene film containing a core layer (layer A) and a skin layer (layer B), said layer B is laminated at least on one surface of said layer A, wherein said layer A contains a polypropylene resin having ?-crystal activity and 1 to 20 mass % particle (a) having an average dispersed diameter of 60 to 400 nm, and wherein, said layer B contains a polypropylene resin and 0.05 to 5 mass % particle (b) of an average dispersed diameter of 1 to 4 ?m. The present invention provides a biaxially oriented white polypropylene film excellent in film quality and productivity and capable of making sensitivity and productivity compatible in a high level when used as a base for a receiving sheet, and a receiving sheet for thermal transfer recording made thereof.Type: ApplicationFiled: May 15, 2007Publication date: August 20, 2009Inventors: Shigeru Tanaka, Junichi Masuda, Masatoshi Ohkura, Tatsuya Itou
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Publication number: 20090142566Abstract: It is aimed to provide a polyarylene sulfide film for an acoustic instrument vibrating plate excellent in heat resistance, molding processability, acoustic properties, and also heat moldability. Provided is a polyarylene sulfide film wherein the elongation at break in either a longitudinal direction or a width direction of the film is 100% or more and 250% or less, and the Young's modulus in either a longitudinal direction or a width direction of the film is 1.5 GPa or more and less than 4 GPa.Type: ApplicationFiled: October 24, 2006Publication date: June 4, 2009Inventors: Tetsuya Machida, Yasuyuki Imanishi, Masatoshi Ohkura, Takuji Higashioji
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Publication number: 20070299219Abstract: A biaxially oriented polyarylene sulfide film and laminated polyarylene sulfide sheets of the film contain polyarylene sulfide and other thermoplastic resin A different from the polyarylene sulfide, wherein the contents of the polyarylene sulfide and the thermoplastic resin A are 70 to 99 parts by weight and 1 to 30 parts by weight respectively when the total amount of the polyarylene sulfide and the thermoplastic resin A is taken as 100 parts by weight and the resin thermoplastic A forms a dispersed phase with an average particle diameter of 10 to 500 nm and the biaxially oriented polyarylene sulfide film exhibits a tensile elongation at break of 110 to 250% in at least one of the longitudinal direction and width direction and a tensile fracture elongation of 80 to 250% in the other direction.Type: ApplicationFiled: October 4, 2005Publication date: December 27, 2007Inventors: Takuji Higashioji, Tetsuya Machida, Masatoshi Ohkura, Yasuyuki Imanishi, Atsushi Ishio, Megumi Yamada