Patents by Inventor Kazuyuki Yahara
Kazuyuki Yahara 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: 11459443Abstract: Provided is a resin material capable of effectively enhancing insulation properties, adhesiveness and long-term insulation reliability. The resin material according to the present invention contains first inorganic particles having an average aspect ratio of 2 or less and an average circularity of 0.90 or less, second inorganic particles having an average aspect ratio of 2 or less and an average circularity of 0.95 or more, third inorganic particles having an average aspect ratio of more than 2, and a binder resin.Type: GrantFiled: June 21, 2018Date of Patent: October 4, 2022Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Yuko Kawahara, Keigo Oowashi, Kouji Ashiba, Rui Zhang, Kazuyuki Yahara, Osamu Inui, Hiroshi Maenaka
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Publication number: 20220242095Abstract: The resin composition of the present invention comprises a polyvinyl acetal resin (A) and an acrylic-based polymer (B), in which the acrylic-based polymer (B) is a polymer of a monomer component comprising an acrylic-based monomer, a dHSP/R of the monomer component relative to the polyvinyl acetal resin (A) is 1.16 or less, and a content of the acrylic-based polymer (B) is 20 parts by mass or more and 90 parts by mass or less based on 100 parts by mass of the polyvinyl acetal resin (A).Type: ApplicationFiled: June 9, 2020Publication date: August 4, 2022Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Yuji OOHIGASHI, Yui HIGASHIONNA, Kazuyuki YAHARA, Juichi FUKATANI
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Publication number: 20220007553Abstract: A conductive nonwoven fabric comprising a metal layer on at least one surface thereof, the conductive nonwoven fabric having a sheet resistance of 200 to 600 ?/? and a density of 2.0×104 to 8.×105 g/m3. The conductive nonwoven fabric has higher radio wave absorption properties (high absorption and low reflectivity), even against high-frequency radio waves.Type: ApplicationFiled: November 28, 2019Publication date: January 6, 2022Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Takefumi KOYAMA, Katsunori MUTOU, Sachiko NAKAO, Kazuyuki YAHARA
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Patent number: 11174331Abstract: A shock-absorbing sheet comprises a foamed resin layer having a thickness of 200 ?m or less, a void ratio (P0.1) of a plane directional cross section at a thickness of 0.1 T, a void ratio (P0.5) of a plane directional cross section at a thickness of 0.5 T, and a void ratio (P0.9) of a plane directional cross section at a thickness of 0.9 T from one surface of the foamed resin layer each ranging from 10 to 70 area %; and the standard deviation (P?) for an average void ratio found from the void ratio (P0.1), the void ratio (P0.5) and the void ratio (P0.9) ranging from 1.0 to 20.Type: GrantFiled: September 28, 2018Date of Patent: November 16, 2021Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Koji Yachi, Hiroshi Hiraike, Yuuki Hoshiyama, Izumi Okamura, Yasuharu Nagai, Kazuyuki Yahara, Ayaha Oguri
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Publication number: 20210261737Abstract: A thermally conductive sheet 10 of the present invention comprises a polymer matrix 12 and an anisotropic filler 13, and the anisotropic filler 13 is oriented in a thickness direction. The anisotropic filler 13 is disposed in such a way as to fall down in a proportion of 1 to 45% in the vicinity of surfaces 10A, 10B of the thermally conductive sheet 10. According to the present invention, a thermally conductive sheet capable of sufficiently improving the thermal conductive properties in the thickness direction can be provided.Type: ApplicationFiled: June 18, 2019Publication date: August 26, 2021Applicant: SEKISUI POLYMATECH CO., LTD.Inventors: Hiroki KUDOH, Taku SASAKI, Kana HATTORI, Kazuyuki YAHARA, Yasunari KUSAKA
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Publication number: 20210189032Abstract: A shock-absorbing sheet comprises a foamed resin layer having a thickness of 200 ?m or less, a void ratio (P0.1) of a plane directional cross section at a thickness of 0.1 T, a void ratio (P0.5) of a plane directional cross section at a thickness of 0.5 T, and a void ratio (P0.9) of a plane directional cross section at a thickness of 0.9 T from one surface of the foamed resin layer each ranging from 10 to 70 area %; and the standard deviation (P?) for an average void ratio found from the void ratio (P0.1), the void ratio (P0.5) and the void ratio (P0.9) ranging from 1.0 to 20.Type: ApplicationFiled: September 28, 2018Publication date: June 24, 2021Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Koji YACHI, Hiroshi HIRAIKE, Yuuki HOSHIYAMA, Izumi OKAMURA, Yasuharu NAGAI, Kazuyuki YAHARA, Ayaha OGURI
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Publication number: 20210130570Abstract: A thermally conductive sheet 10 comprises a polymer matrix 12 and an anisotropic filler 13, and the anisotropic filler 13 is oriented in a thickness direction. The anisotropic filler 13 is exposed on the surfaces 10A, 10B of the thermally conductive sheet 10, and the anisotropic filler 13 which is exposed is disposed in such a way as to fall down in a proportion of 3.5 to 45%.Type: ApplicationFiled: June 18, 2019Publication date: May 6, 2021Applicant: SEKISUI POLYMATECH CO., LTD.Inventors: Hiroki KUDOH, Taku SASAKI, Kana HATTORI, Kazuyuki YAHARA, Yasunari KUSAKA
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Publication number: 20200181358Abstract: Provided is a resin material capable of effectively enhancing insulation properties, adhesiveness and long-term insulation reliability. The resin material according to the present invention contains first inorganic particles having an average aspect ratio of 2 or less and an average circularity of 0.90 or less, second inorganic particles having an average aspect ratio of 2 or less and an average circularity of 0.95 or more, third inorganic particles having an average aspect ratio of more than 2, and a binder resin.Type: ApplicationFiled: June 21, 2018Publication date: June 11, 2020Inventors: Yuko Kawahara, Keigo Oowashi, Kouji Ashiba, Rui Zhang, Kazuyuki Yahara, Osamu Inui, Hiroshi Maenaka
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Patent number: 9416242Abstract: The foamable composition according to the present invention comprises a copolymer of ethylene, an ?-olefin and a non-conjugated diene, a blowing agent, a crosslinking agent, a catalyst and a reaction suppressor, wherein in the foamable composition, the storage elastic modulus at 23° C. as measured by a viscoelasticity measuring apparatus is 2×104 Pa or lower, and the storage elastic modulus after the foamable composition is held at 115° C. for 200 seconds is 5×104 Pa or higher; thereby, a foam body having a low expansion ratio, a low compression strength and a high cushioning property can be produced.Type: GrantFiled: September 27, 2013Date of Patent: August 16, 2016Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuyuki Yahara, Yozo Toei, Yuji Tanikawa, Masahiro Hamada, Akihito Dohi
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Publication number: 20150203648Abstract: The foamable composition according to the present invention comprises a copolymer of ethylene, an ?-olefin and a non-conjugated diene, a blowing agent, a crosslinking agent, a catalyst and a reaction suppressor, wherein in the foamable composition, the storage elastic modulus at 23° C. as measured by a viscoelasticity measuring apparatus is 2×104 Pa or lower, and the storage elastic modulus after the foamable composition is held at 115° C. for 200 seconds is 5×104 Pa or higher; thereby, a foam body having a low expansion ratio, a low compression strength and a high cushioning property can be produced.Type: ApplicationFiled: September 27, 2013Publication date: July 23, 2015Applicant: SEKISUI CHEMICAL CO., LTD/Inventors: Kazuyuki Yahara, Yozo Toei, Yuji Tanikawa, Masahiro Hamada, Akihito Dohi
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Publication number: 20150064435Abstract: Provided is a porous body, which is formed of a resin obtained by crosslinking a copolymer of ethylene, an ?-olefin, and a non-conjugated diene, wherein porosity of the porous body is in the range of 50 to 95% by volume, strength of the porous body at 50% compression is 300 kPa or less, and compression set (A) under atmosphere at a temperature of 80° C. and a relative humidity of 90% is 20% or less.Type: ApplicationFiled: March 28, 2013Publication date: March 5, 2015Inventors: Kazuyuki Yahara, Yozo Toei, Akihito Dohi, Yuji Tanikawa
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Patent number: 7715083Abstract: The present invention aims to provide a light control material capable of optionally controlling the light transmittance in an arbitrary wavelength range among a wide wavelength range, and a light control film formed by using the light control material.Type: GrantFiled: November 24, 2006Date of Patent: May 11, 2010Assignees: Sekisui Chemical Co., Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Kazuyuki Yahara, Kenji Tsuchihara
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Publication number: 20090080056Abstract: The present invention aims to provide a light control material capable of optionally controlling the light transmittance in an arbitrary wavelength range among a wide wavelength range, and a light control film formed by using the light control material.Type: ApplicationFiled: November 24, 2006Publication date: March 26, 2009Inventors: Kazuyuki Yahara, Kenji Tsuchihara
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Patent number: 6958184Abstract: A fire-resistant sheet-like molded article comprising a resin composition and having the relationship between the initial thickness t (mm) and temperature difference ?T(° C.) between one side and the reverse side after heating of said one side at 500° C. for 1 hour as represented by: ?T?0.015t4?0.298t3+1.566t2+30.151t, and having the initial bulk density at 25° C. of 0.8 to 8.0 g/cm3 and the bulk density after 1 hour of heating at 500° C. of 0.05 to 0.5 g/cm3 is provided along with a method of fabricating a fire-resistant structural steel and fire-resistant wall.Type: GrantFiled: April 2, 2002Date of Patent: October 25, 2005Assignee: Sekisui Chemical Co., Ltd.Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata
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Publication number: 20030008119Abstract: A fire-resistant sheet-like molded article comprising a resin composition and having the relationship between the initial thickness t (mm) and temperature difference &Dgr;T(° C.) between one side and the reverse side after heating of said one side at 500° C.Type: ApplicationFiled: April 2, 2002Publication date: January 9, 2003Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata
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Patent number: 6410122Abstract: A fire-resistant sheet-like molded article having flame resistance and capable of producing good fire-resisting properties as the result of residues after combustion having sufficient shape-retaining property and, further, having good workability, a fire-resistant laminate for covering structural steels and a fire-resistant structural material for walls in which said molded article is used as well as a method of fabricating a fire-resistant structural steel and a fire-resistant wall. A fire resistant sheet-like molded article comprising a resin composition and having the-relationship between the initial thickness t (mm) and temperature difference &Dgr;T (° C.) between one side and the reverse side after heating of said one side at 500° C. for 1 hour as represented by: &Dgr;T≧0.015t4−0.298t3+1.566t2+30.151t, and having the initial bulk density at 25° C. of 0.8 to 2.0 g/cm3 and the bulk density after 1 hour of heating at 500° C. of 0.05 to 0.5 g/cm3.Type: GrantFiled: September 2, 1999Date of Patent: June 25, 2002Assignee: Sekisui Chemical Co., Ltd.Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata