Patents by Inventor Yoshihito Takagi
Yoshihito Takagi 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).
-
Publication number: 20160099452Abstract: Disclosed is a laminated porous film which has both gas permeability and heat resistance and can exhibit excellent smoothness and excellent pin extraction properties when used as a separator for a battery. The laminated porous film is characterized by having a heat-resistant layer laminated on at least one surface of a polyolefin resin porous film, wherein the heat-resistant layer comprises a filler and a resin binder, and wherein the surface of the heat-resistant layer has a static friction coefficient of 0.45 or less, a gas permeability degree of 2000 sec/100 ml or less and a tensile elastic modulus of 400 to 1000 MPa when the film is stretched in the lengthwise direction at a stretching rate of 3%.Type: ApplicationFiled: December 14, 2015Publication date: April 7, 2016Applicant: Mitsubishi Plastics, Inc.Inventors: Yoshihito TAKAGI, Satoru Imanaka, Tomoyuki Nemoto, Yasushi Usami
-
Patent number: 9115277Abstract: The purpose is to provide a porous polyolefin resin film which has high gas permeability and a high porosity, and which can exhibit excellent properties including break down properties when used as a separator for a non-aqueous electrolyte secondary battery. The present invention relates to a porous polyolefin resin film which is produced from a resin composition (a) containing a polyolefin resin as the main component and additionally containing organic-inorganic hybrid particles (f).Type: GrantFiled: October 5, 2011Date of Patent: August 25, 2015Assignee: Mitsubishi Plastics, Inc.Inventors: Yoshihito Takagi, Takatoshi Muta, Tomoyuki Nemoto
-
Publication number: 20150044541Abstract: Disclosed is a laminated porous film which has both gas permeability and heat resistance and can exhibit excellent smoothness and excellent pin extraction properties when used as a separator for a battery. The laminated porous film is characterized by having a heat-resistant layer laminated on at least one surface of a polyolefin resin porous film, wherein the heat-resistant layer comprises a filler and a resin binder, and wherein the surface of the heat-resistant layer has a static friction coefficient of 0.45 or less, a gas permeability degree of 2000 sec/100 ml or less and a tensile elastic modulus of 400 to 1000 MPa when the film is stretched in the lengthwise direction at a stretching rate of 3%.Type: ApplicationFiled: July 29, 2014Publication date: February 12, 2015Applicant: Mitsubishi Plastics, Inc.Inventors: Yoshihito Takagi, Satoru Imanaka, Tomoyuki Nemoto, Yasushi Usami
-
Patent number: 8945453Abstract: The present invention provides a method for producing a PTFE fiber that makes it possible, unlike the emulsion spinning process, to obtain a polytetrafluoroethylene (PTFE) fiber, particularly a long PTFE fiber, without using a matrix material, is more productive than conventional production methods such as a slit yarn process, and is capable of enhancing mechanical properties and the degree of freedom in diameter of the obtained fiber. The method for producing the PTFE fiber of the present invention includes the step of reducing a diameter of a string-shape PTFE-containing solid material (a first solid material) by drawing the first solid material at a temperature equal to or higher than a melting point of PTFE. The first solid material can be obtained from a PTFE-containing solid material (a second solid material) containing water and a surfactant, by reducing an amount of the water contained in the second solid material.Type: GrantFiled: June 16, 2008Date of Patent: February 3, 2015Assignees: Nitto Denko Corporation, National University Corporation Kyoto Institute of TechnologyInventors: Daisuke Kitagawa, Takashi Wano, Hideki Yamane, Yoshihito Takagi
-
Publication number: 20130236793Abstract: The purpose is to provide a porous polyolefin resin film which has high gas permeability and a high porosity, and which can exhibit excellent properties including break down properties when used as a separator for a non-aqueous electrolyte secondary battery. The present invention relates to a porous polyolefin resin film which is produced from a resin composition (a) containing a polyolefin resin as the main component and additionally containing organic-inorganic hybrid particles (f).Type: ApplicationFiled: October 5, 2011Publication date: September 12, 2013Applicant: Mitsubishi Plastics, Inc.Inventors: Yoshihito Takagi, Takatoshi Muta, Tomoyuki Nemoto
-
Publication number: 20130143095Abstract: A laminated porous film, where a coating layer (layer II) containing a filler (a), a resin binder (b) and an adhesive agent (c) is laminated on at least one surface of a polyolefin resin porous film (layer I), is provided. The adhesion between the polyolefin resin porous film that serves as a base film and the coating layer is high. The laminated porous film has heat resistance and exhibits excellent properties when used as a separator for a non-aqueous electrolyte secondary battery.Type: ApplicationFiled: May 16, 2011Publication date: June 6, 2013Applicant: Mitsubishi Plastics, Inc.Inventors: Yoshihito Takagi, Tomoyuki Nemoto
-
Publication number: 20130034769Abstract: Disclosed is a laminated porous film that simultaneously satisfies communication, heat resistance and workability and has excellent properties as a separator for non-aqueous electrolyte secondary batteries. The laminated porous film is characterized in that a heat-resistant layer comprising a filler (a), a resin binder(b), and an extending agent(c) is laminated on at least one side of a porous polyolefin resin film, and in that the air permeability is no more than 2,000 s/100 ml.Type: ApplicationFiled: April 6, 2011Publication date: February 7, 2013Applicant: MITSUBISHI PLASTICS, INC.Inventors: Yoshihito Takagi, Satoru Imanaka, Takayuki Monoe, Tomoyuki Nemoto
-
Publication number: 20120231323Abstract: Disclosed is a laminated porous film which has both gas permeability and heat resistance and can exhibit excellent smoothness and excellent pin extraction properties when used as a separator for a battery. The laminated porous film is characterized by having a heat-resistant layer laminated on at least one surface of a polyolefin resin porous film, wherein the heat-resistant layer comprises a filler and a resin binder, and wherein the surface of the heat-resistant layer has a static friction coefficient of 0.45 or less, a gas permeability degree of 2000 sec/100 ml or less and a tensile elastic modulus of 400 to 1000 MPa when the film is stretched in the lengthwise direction at a stretching rate of 3%.Type: ApplicationFiled: November 22, 2010Publication date: September 13, 2012Applicant: MITSUBHISHI PLASTICS, INC.Inventors: Yoshihito Takagi, Satoru Imanaka, Tomoyuki Nemoto, Yasushi Usami
-
Publication number: 20100203332Abstract: The present invention provides a method for producing a PTFE fiber that makes it possible, unlike the emulsion spinning process, to obtain a polytetrafluoroethylene (PTFE) fiber, particularly a long PTFE fiber, without using a matrix material, is more productive than conventional production methods such as a slit yarn process, and is capable of enhancing mechanical properties and the degree of freedom in diameter of the obtained fiber. The method for producing the PTFE fiber of the present invention includes the step of reducing a diameter of a string-shape PTFE-containing solid material (a first solid material) by drawing the first solid material at a temperature equal to or higher than a melting point of PTFE. The first solid material can be obtained from a PTFE-containing solid material (a second solid material) containing water and a surfactant, by reducing an amount of the water contained in the second solid material.Type: ApplicationFiled: June 16, 2008Publication date: August 12, 2010Applicants: Nitto Denko Corporation, National University Corporation Kyoto Institute of TechnologyInventors: Daisuke Kitagawa, Takashi Wano, Hideki Yamane, Yoshihito Takagi
-
Patent number: 5052479Abstract: The flat tubular heat exchange body is provided with shoulders on each of its peripheral side walls at a fixed distance from each end. The ends of the bodies is shaped and sized to fit into a slot in a header pipe so that when the shoulders strike the surface of the header pipe, the invention is automatically fixed.Type: GrantFiled: May 1, 1990Date of Patent: October 1, 1991Assignee: Yuugen Kaisha Marunaka SeisakushoInventors: Ichio Nakajima, Tsuneo Kousaka, Yoshihito Takagi