Patents by Inventor Takashi Inada
Takashi Inada 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: 10501594Abstract: It is possible to obtain a graphite film with its shape controlled, by performing a sag controlling step of controlling temperatures of a polymer film at both widthwise ends and a temperature of the polymer film in a widthwise middle portion within a temperature range from a starting temperature of thermal decomposition of the polymer film to a sag controlling temperature of the polymer film.Type: GrantFiled: November 8, 2016Date of Patent: December 10, 2019Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Kutsumizu, Yasushi Nishikawa, Satoshi Katayama
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Patent number: 10377635Abstract: When a raw material graphite film bad in flatness is laminated onto another material, creases and other defects may be caused. In particular, when a graphite film having a large area is laminated, defects such as creases may be often caused. In order to solve such defects, a flatness correction treatment step is performed wherein a raw material graphite film is subjected to heat treatment up to 2000° C. or higher while a pressure is applied thereto. This flatness correction treatment gives a graphite film good in flatness. Furthermore, when the flatness of the raw material graphite film is corrected by use of a thermal expansion of a core, a graphite film small in sagging can be obtained.Type: GrantFiled: October 15, 2014Date of Patent: August 13, 2019Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Patent number: 9878521Abstract: In order to prevent positional displacement of a graphite sheet laminate during production of a resin molded product obtained by integrally molding the graphite sheet laminate and a resin, the present invention uses a graphite sheet laminate having a structure in which a first fixing layer having a modulus of elasticity of not less than 7.0×104 Pa and not more than 5.0×107 Pa at 250° C. is in contact with a graphite sheet on at least one of principal surfaces of the graphite sheet.Type: GrantFiled: January 30, 2014Date of Patent: January 30, 2018Assignee: KANEKA CORPORATIONInventors: Makoto Kutsumizu, Yusuke Ohta, Satoshi Katayama, Takashi Inada, Motoaki Kobayashi, Yasushi Nishikawa
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Patent number: 9868639Abstract: There has been a problem that wrinkles easily occur on a carbonaceous film produced by the use of a continuous production method and on a graphite film obtained by heat-treating the carbonaceous film. In the present invention, heating treatment is carried out on a polymeric film while applying pressure to the polymeric film in the film thickness direction with the use of a continuous carbonization apparatus. This makes it possible to obtain a carbonaceous film and a graphite film in which wrinkling is reduced.Type: GrantFiled: September 19, 2013Date of Patent: January 16, 2018Assignee: KANEKA CORPORATIONInventors: Satoshi Katayama, Yusuke Ohta, Takashi Inada, Makoto Kutsumizu, Yasushi Nishikawa
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Patent number: 9845267Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: GrantFiled: January 13, 2016Date of Patent: December 19, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Patent number: 9776927Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: GrantFiled: January 13, 2016Date of Patent: October 3, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Patent number: 9682542Abstract: A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.Type: GrantFiled: December 16, 2015Date of Patent: June 20, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa, Takashi Inada
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Patent number: 9637386Abstract: A graphite film which is low in graphite dust generation can be produced by properly selecting acid dianhydride and diamine which constitute a polyimide film, which polyimide film is a raw material of the graphite film. Specifically, the graphite film which is low in graphite dust generation can be obtained if (1) the acid dianhydride is PMDA and the diamine has a molar ratio of ODA/PDA in a range of 100:0 to 80:20, or (2) the acid dianhydride has a molar ratio of PMDA/BPDA in a range of 80:20 to 50:50, and the diamine has a molar ratio of ODA/PDA in a range of 30:70 to 90:10.Type: GrantFiled: November 28, 2016Date of Patent: May 2, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
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Publication number: 20170050852Abstract: It is possible to obtain a graphite film with its shape controlled, by performing a sag controlling step of controlling temperatures of a polymer film at both widthwise ends and a temperature of the polymer film in a widthwise middle portion within a temperature range from a starting temperature of thermal decomposition of the polymer film to a sag controlling temperature of the polymer film.Type: ApplicationFiled: November 8, 2016Publication date: February 23, 2017Applicant: KANEKA CORPORATIONInventors: Yusuke OHTA, Takashi INADA, Makoto KUTSUMIZU, Yasushi NISHIKAWA, Satoshi KATAYAMA
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Patent number: 9540285Abstract: A graphite film which is low in graphite dust generation can be produced by properly selecting acid dianhydride and diamine which constitute a polyimide film, which polyimide film is a raw material of the graphite film. Specifically, the graphite film which is low in graphite dust generation can be obtained if (1) the acid dianhydride is PMDA and the diamine has a molar ratio of ODA/PDA in a range of 100:0 to 80:20, or (2) the acid dianhydride has a molar ratio of PMDA/BPDA in a range of 80:20 to 50:50, and the diamine has a molar ratio of ODA/PDA in a range of 30:70 to 90:10.Type: GrantFiled: August 19, 2011Date of Patent: January 10, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
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Publication number: 20170001867Abstract: Provided is a method of producing a graphite film having a high thermal diffusivity, the method including heat-treating, at a temperature of not lower than 2,400° C., a polyimide film or a carbonized film obtained by carbonizing the polyimide film, the polyimide film (i) having a thickness of not less than 34 ?m and not more than 42 ?m and a birefringence of not less than 0.1000 and (ii) being obtained with use of (a) an acid dianhydride component containing not less than 70 mol % of PMDA and (b) a diamine component containing not less than 70 mol % of ODA.Type: ApplicationFiled: November 28, 2014Publication date: January 5, 2017Applicant: KANEKA CORPORATIONInventors: Motoaki KOBAYASHI, Yasushi NISHIKAWA, Takashi INADA, Yusuke OHTA, Satoshi KATAYAMA, Makoto KUTSUMIZU
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Patent number: 9533888Abstract: It is possible to obtain a graphite film with its shape controlled, by performing a sag controlling step of controlling temperatures of a polymer film at both widthwise ends and a temperature of the polymer film in a widthwise middle portion within a temperature range from a starting temperature of thermal decomposition of the polymer film to a sag controlling temperature of the polymer film.Type: GrantFiled: August 17, 2012Date of Patent: January 3, 2017Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Kutsumizu, Yasushi Nishikawa, Satoshi Katayama
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Patent number: 9512005Abstract: In a method for producing a carbonaceous film in which a polymer film is wrapped around a core and is subjected to a heat treatment, material film surfaces during the carbonization step are prevented from fusion, whereby a long carbonaceous having a large area film is obtained. Fusion can be prevented by subjecting a polymer film to a heat treatment under a reduced pressure, and under a reduced pressure while allowing an inert gas to flow. The range of the pressure reduction is preferably ?0.08 MPa to ?0.01 kPa. It is preferred to carry out carbonization with the pressure reduced in the range of from ?0.08 MPa to ?0.01 kPa while allowing an inert gas to flow.Type: GrantFiled: September 5, 2014Date of Patent: December 6, 2016Assignee: KANEKA CORPORATIONInventors: Takashi Inada, Yasushi Nishikawa, Makoto Mishiro
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Patent number: 9500418Abstract: There is provided a graphite composite film including a graphite film and a metal layer formed on a surface of the graphite film, in which peeling-off of the metal layer from the graphite film is suppressed. More specifically, the graphite composite film includes a graphite film and a metal layer formed on at least one side of the graphite film, wherein the graphite film has a plurality of through holes formed therein, a metal layer is formed also inside the through holes so as to be connected to the metal layer formed on a surface of the graphite film, the metal layer inside the through holes is formed continuously from the one side to an opposite side of the graphite film, and a distance between outer diameters of the through holes is 0.6 mm or less and a ratio of an area of metal inside the through holes to an area of the graphite composite film is 1.4% or more.Type: GrantFiled: January 11, 2013Date of Patent: November 22, 2016Assignee: KANEKA CORPORATIONInventors: Makoto Kutsumizu, Yasushi Nishikawa, Yusuke Ohta, Satoshi Katayama, Takashi Inada, Takashi Inada
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Patent number: 9359209Abstract: A re-forming process is carried out in which a material graphite film is heat-treated to not less than 2000° C. while the material graphite film is being pressured. Through the re-forming process, sag of a graphite film is controlled. By using, during the re-forming process, a plurality of inner cores having respective different surface states, it is possible to produce a graphite film having two or more sag forms which have respective effects.Type: GrantFiled: October 23, 2012Date of Patent: June 7, 2016Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Kutsumizu, Takashi Inada, Satoshi Katayama, Yasushi Nishikawa
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Patent number: 9272169Abstract: A fire barrier system for use in aircraft, ship or offshore drilling platform comprises a flexible graphite sheet. Methods of providing fire barrier protection in an aircraft, ship or offshore drilling platform comprise installing the described fire barrier system in the aircraft, ship or offshore drilling platform. Additionally, the fire barrier system when installed in the aircraft, ship or offshore drilling platform is described.Type: GrantFiled: September 13, 2010Date of Patent: March 1, 2016Assignee: KANEKA CORPORATIONInventors: Kazuhiro Ono, Yasushi Nishikawa, Takashi Inada
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Patent number: 9266736Abstract: Provided is a long and large-area graphite film having improved thermal diffusivity and flex resistance, and accompanied by ameliorated ruffling. According to a method for producing a graphite film, in which graphitization of a heat-treated film consisting of a carbonized polymer film is carried out in a state being wrapped around an internal core, the method being characterized in that a heat treatment is executed by controlling distance(s) between the internal core and the film, and/or between the layers of the film, a graphite film accompanied by significantly ameliorated ruffling can be obtained.Type: GrantFiled: June 22, 2009Date of Patent: February 23, 2016Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Makoto Mishiro, Takashi Inada, Yasushi Nishikawa
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Publication number: 20160046435Abstract: Disclosed herein is a method for producing an elongated (rolled) carbonaceous film by polymer pyrolysis while suppressing the fusion bonding of the carbonaceous film. The method for producing a carbonaceous film includes the step of heat-treating a polymer film wound into a roll, wherein the heat treatment is performed after the polymer film is wound into a roll to have a gap between adjacent layers of the polymer film at a temperature lower than a pyrolysis onset temperature of the polymer film so that the roll of polymer film as a whole satisfies a relationship that a value obtained by dividing a thickness of a gap between adjacent layers of the polymer film (Ts) by a thickness of the polymer film (Tf) (Ts/Tf) is 0.16 or higher but 1.50 or lower.Type: ApplicationFiled: October 8, 2015Publication date: February 18, 2016Applicant: KANEKA CORPORATIONInventors: Makoto MISHIRO, Yusuke OHTA, Takashi INADA, Yasushi NISHIKAWA
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Patent number: 9249025Abstract: Disclosed herein is a method for producing a roll-shaped carbonaceous film by polymer pyrolyzis while suppressing the occurrence of fusion bonding in the roll-shaped carbonaceous film. The carbonaceous film production method includes the step of heat-treating a polymer film wound into a roll, wherein, at a temperature equal to or higher than the pyrolyzis onset temperature of the polymer film but equal to or lower than a temperature at which the weight of the polymer film is reduced by 40% as compared to that before heat treatment, the roll-shaped polymer film has (2-1) a gap between layers of the polymer film so that a value determined for the whole roll-shaped polymer film by dividing the thickness of the gap between adjacent layers of the polymer film (Ts) by the thickness of the polymer film (Tf) (Ts/Tf) satisfies a relationship of 0.33?Ts/Tf?1.Type: GrantFiled: July 25, 2012Date of Patent: February 2, 2016Assignee: KANEKA CORPORATIONInventors: Makoto Mishiro, Yusuke Ohta, Takashi Inada, Yasushi Nishikawa
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Patent number: 9249024Abstract: A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.Type: GrantFiled: February 14, 2011Date of Patent: February 2, 2016Assignee: KANEKA CORPORATIONInventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa, Takashi Inada