Patents by Inventor Kazuhiko Nakayama
Kazuhiko Nakayama 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: 20200070479Abstract: There is provided an interlayer film for laminated glass with which laminated glass having a gradation pattern with suppressed color irregularity can be prepared.Type: ApplicationFiled: November 6, 2019Publication date: March 5, 2020Inventors: Kazuhiko Nakayama, Kouhei Yamaguchi, Juichi Fukatani, Yasuyuki Izu
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Publication number: 20200055286Abstract: Provided is laminated glass capable of preventing generation of a projection in the interlayer film in an end part of laminated glass, and keeping the appearance of laminated glass excellent. Laminated glass according to the present invention is laminate glass including a first lamination glass member, a second lamination glass member, and an interlayer film containing a thermoplastic resin, and when a light irradiation test: “conducting 4 cycles each cycle including the process of irradiating the laminated glass with xenon light at a black panel temperature of 83° C. and a humidity of 50% RH for 144 hours, and dipping the laminated glass in pure water at 80° C. for 24 hours” is conducted in the laminated glass, a ratio of a weight average molecular weight of the thermoplastic resin at a position of 2 mm inwardly from an end part of the laminated glass, to a weight average molecular weight of the thermoplastic resin at a position of 70 mm inwardly from an end part of the laminated glass is more than 0.5.Type: ApplicationFiled: March 30, 2018Publication date: February 20, 2020Inventors: Shougo Yoshida, Manabu Matsumoto, Kazuhiko Nakayama, Jun Sasaki, Moyuru Okano
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Publication number: 20200023621Abstract: Provided is laminated glass capable of preventing generation of a void in the interlayer film in an end part of laminated glass, and keeping the appearance of laminated glass excellent. Laminated glass according to the present invention is laminate glass including a first lamination glass member, a second lamination glass member, and an interlayer film containing a thermoplastic resin, and no void is generated in the interlayer film irradiated with light in an end part of the laminated glass after a first light irradiation test: “conducting 4 cycles each cycle including the process of irradiating the laminated glass with xenon light 180 W/m2 at a black panel temperature of 83° C. and a humidity of 50% RH for 144 hours, and dipping the laminated glass in pure water at 80° C. for 24 hours”, or a void is generated within a length of 1 mm or less inwardly from an end part of the interlayer film irradiated with light in the end part of the laminated glass after the first light irradiation test.Type: ApplicationFiled: March 30, 2018Publication date: January 23, 2020Inventors: Shougo Yoshida, Manabu Matsumoto, Kazuhiko Nakayama, Jun Sasaki, Moyuru Okano
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Patent number: 10532541Abstract: The present invention aims to provide an interlayer film for a laminated glass which is easily peelable without autohesion even after storage in a stacked state, and a laminated glass prepared using the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of protrusions on at least one surface, the surface having an arrangement density of the protrusions of 3 protrusions/mm2 or more, and the protrusions having an area ratio of 15 to 75% to the surface.Type: GrantFiled: April 13, 2016Date of Patent: January 14, 2020Assignee: SEKISUI CHEMICAL CO., LTD.Inventor: Kazuhiko Nakayama
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Publication number: 20200009838Abstract: Provided is a thermoplastic resin film capable of controlling the occurrence of color irregularity after irradiation with light. The thermoplastic resin film according to the present invention contains a thermoplastic resin, a pigment, and a hindered amine light stabilizer.Type: ApplicationFiled: March 30, 2018Publication date: January 9, 2020Inventors: Shougo Yoshida, Kazuhiko Nakayama, Atsushi Nohara
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Patent number: 10513092Abstract: There is provided an interlayer film for laminated glass with which laminated glass having a gradation pattern with suppressed color irregularity can be prepared.Type: GrantFiled: November 14, 2013Date of Patent: December 24, 2019Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Nakayama, Kouhei Yamaguchi, Juichi Fukatani, Yasuyuki Izu
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Publication number: 20190375197Abstract: The present invention aims to provide an interlayer film for a laminated glass that enables production of a laminated glass having high visible light transmittance even when deaeration for preliminary pressure bonding and heating for final pressure bonding are performed in parallel in a vacuum deaeration method. The present invention also aims to provide a method for producing the interlayer film for a laminated glass, and a laminated glass including the interlayer film for a laminated glass. Provided is an interlayer film for a laminated glass having a multitude of recesses on at least one surface, the surface with the recesses having a texture aspect ratio Str of 0.04 or lower as measured in conformity with ISO 25178.Type: ApplicationFiled: March 28, 2018Publication date: December 12, 2019Applicant: SEKISUI CHEMICAL CO., LTD.Inventor: Kazuhiko NAKAYAMA
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Patent number: 10471686Abstract: The present invention aims to provide an interlayer film for a laminated glass capable of exhibiting high deaeration properties even in a nip roll method and hardly forming air bubbles to enable the production of a highly visible laminated glass, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses and a large number of projections on at least one surface, the recesses each having a groove shape with a continuous bottom and being regularly adjacent to each other in parallel with one another, the recesses each having a groove shape with a continuous bottom having a ratio (R/Sm×100) of a radius of rotation R of the bottom to an interval Sm between the recesses of 15% or higher.Type: GrantFiled: September 30, 2015Date of Patent: November 12, 2019Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Nakayama, Hiroaki Inui, Hirofumi Kitano
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Patent number: 10350858Abstract: The present invention aims to provide an interlayer film for laminated glass having small optical distortion while having a multilayer structure of two or more layers, and a laminated glass including the interlayer film for laminated glass. The present invention relates to an interlayer film for laminated glass including at least two resin layers laminated together, the interlayer film having a large number of minute recesses and a large number of minute projections on at least one surface, the at least two resin layers including a first surface layer and a second surface layer and each containing a thermoplastic resin and a plasticizer, wherein, provided that the interlayer film is allowed to stand at 23° C. and a humidity of 30% RH for three hours, and cut with a microtome at 23° C.Type: GrantFiled: March 31, 2015Date of Patent: July 16, 2019Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Shougo Yoshida, Kazuhiko Nakayama, Tatsuya Iwamoto
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Patent number: 10307998Abstract: There is provided an interlayer film for laminated glass with which laminated glass having a gradation pattern with suppressed color irregularity can be prepared. The interlayer film for laminated glass according to the present invention includes a first resin layer containing a thermoplastic resin and a plasticizer and a second resin layer containing a thermoplastic resin, a plasticizer and inorganic particles, and the first resin layer being arranged on a first surface side of the second resin layer, wherein a gradation part being a region where the parallel light transmittance is greater than 30% and less than 60% and being a region where the thickness of the second resin layer is continuously decreased in the direction orthogonal to the thickness direction of the interlayer film at the time of preparing the laminated glass exists, and the complex viscosity at 200° C. of the second resin layer is greater than or equal to 0.7 times and less than or equal to 2 times the complex viscosity at 200° C.Type: GrantFiled: November 17, 2017Date of Patent: June 4, 2019Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Nakayama, Kouhei Yamaguchi, Yasuyuki Izu
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Patent number: 10226803Abstract: The present invention aims to provide an embossed thermoplastic resin sheet that is capable of enhancing deaeration during production of laminated glass and suppressing optical distortion of the resulting laminated glass to improve the visibility when used as an interlayer film for laminated glass. The present invention also relates to an engraved roll used for production of the embossed thermoplastic resin sheet, a production method of the engraved roll, an interlayer film for laminated glass including the embossed thermoplastic resin sheet, and a laminated glass. The present invention relates to an embossed thermoplastic resin sheet having a large number of recesses and a large number of projections on at least one surface, the recesses each having a groove shape with a continuous bottom and being regularly arranged side by side in parallel with one another, the thermoplastic resin sheet having not more than three defects of the projections per mm2 on the surface.Type: GrantFiled: June 25, 2015Date of Patent: March 12, 2019Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Nakayama, Hiroaki Inui
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Publication number: 20190039354Abstract: The present invention aims to provide an interlayer film for a laminated glass that adheres sufficiently to glass at peripheral portions of the glass to prevent occurrence of a sealing failure at the peripheral portions and also to contribute to improved production efficiency of laminated glass in production of laminated glass, even when having a thickness at the thickest portion of 850 ?m or more, and a laminated glass produced using the interlayer film for a laminated glass. Provided is an interlayer film for a laminated glass having a large number of recesses on at least one surface, the interlayer film for a laminated glass having a thickness T (?m) measured in conformity with JIS K-6732 (1996) and a maximum height roughness Ry (?m) measured in conformity with JIS B-0601 (1994) at a thickest portion, the thickness T and the maximum height roughness Ry satisfying the following expressions (1) and (1?): Ry?0.0195×T+33.2??(1), T?850??(1?).Type: ApplicationFiled: March 31, 2017Publication date: February 7, 2019Applicant: SEKISUI CHEMICAL CO., LTD.Inventor: Kazuhiko NAKAYAMA
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Patent number: 9969145Abstract: The present invention aims to provide an interlayer film for an automotive windshield which, while having recesses in the shape of engraved lines, enables the production of automotive windshields with high yield by a vacuum deaeration method; a roll of the interlayer film for an automotive windshield; and an automotive windshield including the interlayer film for an automotive windshield. The present invention relates to an interlayer film for an automotive windshield. The interlayer film includes, on at least one surface thereof, a large number of recesses and a large number of projections. The recesses have a groove shape with a continuous bottom. The recesses are adjacently arranged regularly side by side in parallel with one another. The recesses in a groove shape with a continuous bottom are inclined 35° or more relative to the machine direction of the film in production of the interlayer film for an automotive windshield.Type: GrantFiled: April 9, 2015Date of Patent: May 15, 2018Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Nakayama, Hiroaki Inui, Hirofumi Kitano
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Publication number: 20180117887Abstract: There is provided an interlayer film for laminated glass with which laminated glass having a gradation pattern with suppressed color irregularity can be prepared. The interlayer film for laminated glass according to the present invention includes a first resin layer containing a thermoplastic resin and a plasticizer and a second resin layer containing a thermoplastic resin, a plasticizer and inorganic particles, and the first resin layer being arranged on a first surface side of the second resin layer, wherein a gradation part being a region where the parallel light transmittance is greater than 30% and less than 60% and being a region where the thickness of the second resin layer is continuously decreased in the direction orthogonal to the thickness direction of the interlayer film at the time of preparing the laminated glass exists, and the complex viscosity at 200° C. of the second resin layer is greater than or equal to 0.7 times and less than or equal to 2 times the complex viscosity at 200° C.Type: ApplicationFiled: November 17, 2017Publication date: May 3, 2018Inventors: Kazuhiko Nakayama, Kouhei Yamaguchi, Yasuyuki Izu
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Publication number: 20180050519Abstract: The present invention aims to provide an interlayer film for a laminated glass having recesses in the shape of engraved lines on both surfaces to exhibit excellent deaeration properties in production of a laminated glass and suppressing formation of a moire pattern when unwound from a rolled body thereof. The present invention also aims to provide a laminated glass including the interlayer film for a laminated glass, a method for producing an embossing roll suitably used for production of the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass.Type: ApplicationFiled: April 8, 2016Publication date: February 22, 2018Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko NAKAYAMA, Morimasa OMIZU, Masaya KONDOU
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Publication number: 20180037008Abstract: The present invention aims to provide an interlayer film for a laminated glass which is easily peelable without autohesion even after storage in a stacked state, and a laminated glass prepared using the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of protrusions on at least one surface, the surface having an arrangement density of the protrusions of 3 protrusions/mm2 or more, and the protrusions having an area ratio of 15 to 75% to the surface.Type: ApplicationFiled: April 13, 2016Publication date: February 8, 2018Applicant: SEKISUI CHEMICAL CO., LTD.Inventor: Kazuhiko NAKAYAMA
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Publication number: 20180022058Abstract: The present invention provides an interlayer film for a laminated glass which is easily peelable without autohesion even after storage in a stacked state, a laminated glass prepared using the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass. The present invention provides an interlayer film for a laminated glass, having a large number of recesses on at least one surface, the at least one surface having the recesses having an arithmetical mean height Sa of 200 nm or more as measured in conformity with ISO 25178.Type: ApplicationFiled: April 8, 2016Publication date: January 25, 2018Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko NAKAYAMA, Hiroshi KAWATE, Koji KIDO, Michiko MORI
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Patent number: 9840068Abstract: There is provided an interlayer film for laminated glass with which laminated glass having a gradation pattern with suppressed color irregularity can be prepared. The interlayer film for laminated glass according to the present invention includes a first resin layer containing a thermoplastic resin and a plasticizer and a second resin layer containing a thermoplastic resin, a plasticizer and inorganic particles, and the first resin layer being arranged on a first surface side of the second resin layer, wherein a gradation part being a region where the parallel light transmittance is greater than 30% and less than 60% and being a region where the thickness of the second resin layer is continuously decreased in the direction orthogonal to the thickness direction of the interlayer film at the time of preparing the laminated glass exists, and the complex viscosity at 200° C. of the second resin layer is greater than or equal to 0.7 times and less than or equal to 2 times the complex viscosity at 200° C.Type: GrantFiled: November 14, 2014Date of Patent: December 12, 2017Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Nakayama, Kouhei Yamaguchi, Yasuyuki Izu
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Publication number: 20170217122Abstract: The present invention aims to provide an interlayer film for a laminated glass capable of exhibiting high deaeration properties in a vacuum deaeration method and enabling production of a highly transparent laminated glass, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses on at least one surface, the recesses each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the recesses each having a radius of rotation R of a bottom of the groove shape with a continuous bottom of 45 ?m or less.Type: ApplicationFiled: October 13, 2015Publication date: August 3, 2017Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko NAKAYAMA, Hiroaki INUI, Hirofumi KITANO
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Publication number: 20170203536Abstract: The present invention aims to provide an interlayer film for a laminated glass which can be stored in a stacked state without experiencing autohesion so as to be easily peelable, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses and a large number of projections on a first surface and a second surface opposite to the first surface, the recesses on the first surface and the second surface each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the interlayer film for a laminated glass satisfying Formulae (1) and (2): ??10°??(1), R/Sm?0.Type: ApplicationFiled: September 30, 2015Publication date: July 20, 2017Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko NAKAYAMA, Yuusuke OOTA, Hirofumi KITANO, Hiroaki INUI