Patents by Inventor Taisuke Yamaguchi
Taisuke Yamaguchi 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: 11958392Abstract: A seat pad manufacturing method is provided. The method includes disposing a sheet member inside a foaming mold for shaping a seat pad, then injecting a foaming resin material into the foaming mold and foaming a resin foamed body through mold clamping, and demolding the resin foamed body in a state in which the sheet member is buried in the resin foamed body. Both end parts of the sheet member in the right-left direction and both end parts of the sheet member in the extending direction are each temporarily fastened to the surface of the mold through a fastener. The foaming resin material is injected into a space between the mold surface and the sheet member. A central part of the sheet member deforms into a shape curved in a convex shape as the sheet member is pressed upward through expansion of the foaming resin material.Type: GrantFiled: December 6, 2022Date of Patent: April 16, 2024Assignee: Archem Inc.Inventors: Yukiko Yamaguchi, Taisuke Yonezawa, Yoshiyuki Takahashi
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Patent number: 10918996Abstract: The present invention provides a spiral membrane element in which the effective membrane area of a composite semi-permeable membrane can be increased and any decrease in rejection rate is less likely to occur. The spiral membrane element includes: a laminate including a permeation-side flow path material, a supply-side flow path material, and a composite semi-permeable membrane having a separation function layer on a surface of a porous support; a perforated central tube around which the laminate is wound; and a sealing member for preventing mixing between the supply-side flow path and a permeation-side flow path, the spiral membrane element being characterized in that the thickness of the porous support of the composite semi-permeable membrane is 80 ?m to 100 ?m, the permeation-side flow path material is formed from a tricot knit fabric, and the width of a groove that continues in a straight line is 0.05 mm to 0.40 mm.Type: GrantFiled: September 24, 2015Date of Patent: February 16, 2021Assignee: NITTO DENKO CORPORATIONInventors: Taisuke Yamaguchi, Atsuko Mizuike, Masashi Echizen, Kazusa Matsui
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Patent number: 10682615Abstract: The objective of the present invention is to provide a composite semi-permeable membrane having high processing efficiency even when processing of wastewater having a suspended matter content high enough to tend to result in clogging, said processing efficiency being unlikely to decline even under elevated-pressure operation accompanying continuous use at high pressure. The present invention pertains to a composite semi-permeable membrane having a polymer porous layer on one surface of a nonwoven cloth layer, and a polyamide separation function layer on the polymer porous layer, wherein the ratio of the thickness of the polymer porous layer to the thickness of the nonwoven cloth layer is 0.22 to 0.45.Type: GrantFiled: October 31, 2014Date of Patent: June 16, 2020Assignee: NITTO DENKO CORPORATIONInventors: Masashi Echizen, Atsuhito Komoto, Yasuyuki Sakakibara, Kazusa Matsui, Taisuke Yamaguchi
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Patent number: 10357747Abstract: A method for producing a spiral wound separation membrane element includes preparing a composite semipermeable membrane having a skin layer on the surface of a porous support. The method further includes forming on the skin layer a protective layer containing 35 mg/m2 or more of an anionic polyvinyl alcohol to prepare a protective layer-equipped composite semipermeable membrane, preparing an unwashed spiral wound separation membrane element from the protective layer-equipped composite semipermeable membrane, and passing wash water through the unwashed spiral wound separation membrane element to remove the protective layer on the skin layer.Type: GrantFiled: September 30, 2016Date of Patent: July 23, 2019Assignee: NITTO DENKO CORPORATIONInventors: Shinya Nishiyama, Taisuke Yamaguchi, Takahisa Konishi, Hiroki Fujioka, Takashi Kamada, Shinichi Inoue
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Publication number: 20180280890Abstract: The purpose of the present invention is to provide a method for producing a spiral wound separation membrane element that is capable of maintaining the membrane performance of a composite semipermeable membrane before processing into an element and has excellent membrane performance. This method for producing a spiral wound separation membrane element includes: a step for preparing a composite semipermeable membrane having a skin layer on the surface of a porous support; a step for forming on the skin layer a protective layer containing 35 mg/m2 or more of an anionic polyvinyl alcohol to prepare a protective layer-equipped composite semipermeable membrane; a step for preparing an unwashed spiral wound separation membrane element using the protective layer-equipped composite semipermeable membrane; and a step for passing wash water through the unwashed spiral wound separation membrane element to remove the protective layer on the skin layer.Type: ApplicationFiled: September 30, 2016Publication date: October 4, 2018Applicant: NITTO DENKO CORPORATIONInventors: Shinya NISHIYAMA, Taisuke YAMAGUCHI, Takahisa KONISHI, Hiroki FUJIOKA, Takashi KAMADA, Shinichi INOUE
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Publication number: 20170304775Abstract: The present invention provides a spiral membrane element in which the effective membrane area of a composite semi-permeable membrane can be increased and any decrease in rejection rate is less likely to occur. The spiral membrane element includes: a laminate including a permeation-side flow path material, a supply-side flow path material, and a composite semi-permeable membrane having a separation function layer on a surface of a porous support; a perforated central tube around which the laminate is wound; and a sealing member for preventing mixing between the supply-side flow path and a permeation-side flow path, the spiral membrane element being characterized in that the thickness of the porous support of the composite semi-permeable membrane is 80 ?m to 100 ?m, the permeation-side flow path material is formed from a tricot knit fabric, and the width of a groove that continues in a straight line is 0.05 mm to 0.40 mm.Type: ApplicationFiled: September 24, 2015Publication date: October 26, 2017Applicant: NITTO DENKO CORPORATIONInventors: Taisuke YAMAGUCHI, Atsuko MIZUIKE, Masashi ECHIZEN, Kazusa MATSUI
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Publication number: 20170282129Abstract: The purpose of the present invention is to provide: a thin composite semipermeable membrane having a practical salt rejection and permeation flux; a method for producing said membrane; and a spiral wound separation membrane element that has a practical salt rejection and provides excellent water treatment efficiency. The method for producing the composite semipermeable membrane includes a step in while, while feeding out a porous support having a porous polymer layer on one surface of a nonwoven fabric layer from a supply roll, an amine solution containing a multifunctional amine component is brought into contact with the porous support, and an organic solution containing a multifunctional acid halide component is brought into contact with the amine solution on the porous support to cause interfacial polymerization, thus forming a skin layer containing a polyamide resin on the surface of the porous support.Type: ApplicationFiled: September 28, 2015Publication date: October 5, 2017Applicant: NITTO DENKO CORPORATIONInventors: Kazusa MATSUI, Masashi ECHIZEN, Atsuko MIZUIKE, Taisuke YAMAGUCHI
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Publication number: 20170274328Abstract: Provided are a composite semipermeable membrane that will maintain a sufficient level of rejection performance even when produced using different thicknesses of a porous support or different production conditions, a separation membrane element having such a composite semipermeable membrane, and a method for producing such a composite semipermeable membrane. The composite semipermeable membrane includes a porous support including a nonwoven fabric layer and a polymer porous layer on one surface of the nonwoven fabric layer; and a separation function layer on the surface of the porous support, wherein the porous support has a defect frequency F1 of 50 or less per 480 m2 with respect to defects having a width of 0.3 mm or more perpendicular to the direction of the polymer porous layer production line, when the relationship between the size and frequency of defects in the porous support is measured with transmitted light.Type: ApplicationFiled: August 28, 2015Publication date: September 28, 2017Applicant: NITTO DENKO CORPORATIONInventors: Atsuko MIZUIKE, Masashi ECHIZEN, Kazusa MATSUI, Taisuke YAMAGUCHI
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Publication number: 20160279581Abstract: The objective of the present invention is to provide a composite semi-permeable membrane having high processing efficiency even when processing of wastewater having a suspended matter content high enough to tend to result in clogging, said processing efficiency being unlikely to decline even under elevated-pressure operation accompanying continuous use at high pressure. The present invention pertains to a composite semi-permeable membrane having a polymer porous layer on one surface of a nonwoven cloth layer, and a polyamide separation function layer on the polymer porous layer, wherein the ratio of the thickness of the polymer porous layer to the thickness of the nonwoven cloth layer is 0.22 to 0.45.Type: ApplicationFiled: October 31, 2014Publication date: September 29, 2016Inventors: Masashi Echizen, Atsuhito Komoto, Yasuyuki Sakakibara, Kazusa Matsui, Taisuke Yamaguchi