Patents Assigned to JNC Filter Co., Ltd.
  • Publication number: 20220193586
    Abstract: This depth filter comprises a substrate layer, a filtration layer, and a skin layer in this order. The substrate layer and the skin layer are layers obtained by winding and thermally fusing a nonwoven cloth configured from fibers having an average fiber diameter of 150 ?m or more. The filtration layer is a layer obtained by winding a layered body two or more times, the layered body containing at least a net and a nonwoven cloth included only in the filtration layer. The average fiber diameter of the nonwoven cloth constituting the substrate layer and the average fiber diameter of the nonwoven cloth constituting the skin layer are larger than the average fiber diameter of the nonwoven cloth included only in the filtration layer.
    Type: Application
    Filed: March 24, 2020
    Publication date: June 23, 2022
    Applicants: JNC CORPORATION, JNC FILTER CO., LTD.
    Inventors: Ryota MINEO, Hisato NISHIHARA, Osamu YAMAGUCHI, Kazuki KANARI
  • Publication number: 20220096976
    Abstract: A depth filter with excellent filtration accuracy and pressure resistance performance even for fluids containing high density and high viscosity powder fine particles. A depth filter having a base material layer, a filtration layer, and a skin layer, in that order, wherein: the substrate layer and the skin layer are layers made by a nonwoven fabric being wound and thermally fused; the filtration layer is a laminate in which at least a nonwoven fabric and a net are laminated, being wound twice or more; and the nonwoven fabric contained in the filtration layer contains a mixed-fiber nonwoven fabric containing two or more types of fibers with mutually different average fiber diameters.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 31, 2022
    Applicants: JNC CORPORATION, JNC FILTER CO., LTD.
    Inventors: Ryota MINEO, Hisato NISHIHARA, Osamu YAMAGUCHI
  • Patent number: 11141686
    Abstract: A hollow cylindrical depth filter formed of fibers of a thermoplastic resin and having a thickness of a filter medium of 5 to 25 millimeters, in which the filter medium has a compression ratio of 0.2 or less when a load of 0.5 MPa is applied thereto, the filter medium has a fiber layer of at least three layers from a fluid inflow side toward an outflow side, porosity of the three layers are adjusted to a specific range, respectively, and intersection points of the fibers forming the filter medium are bonded, a mean interval between the intersection points is 2 to 100 times a mean fiber diameter of the fibers in a length direction, and a ratio of the mean fiber diameter on a surface on an upstream side to the mean fiber diameter on a surface on a downstream side of the filter medium is 0.9 to 1.2.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: October 12, 2021
    Assignees: JNC Corporation, JNC Filter Co., Ltd.
    Inventors: Kouichi Ozamoto, Kento Nakamura, Isamu Futase, Takumi Kojima
  • Patent number: 11052339
    Abstract: A hollow cylindrical depth filter formed of fibers of a thermoplastic resin and having a thickness of a filter medium of 5 to 25 millimeters, in which the filter medium has a compression ratio of 0.2 or less when a load of 0.5 MPa is applied thereto, the filter medium has a fiber layer of at least three layers from a fluid inflow side toward an outflow side, porosity of the three layers are adjusted to a specific range, respectively, and intersection points of the fibers forming the filter medium are bonded, a mean interval between the intersection points is 2 to 100 times a mean fiber diameter of the fibers in a length direction, and a ratio of the mean fiber diameter on a surface on an upstream side to the mean fiber diameter on a surface on a downstream side of the filter medium is 0.9 to 1.2.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: July 6, 2021
    Assignees: JNC Corporation, JNC Filter Co., Ltd.
    Inventors: Kouichi Ozamoto, Kento Nakamura, Isamu Futase, Takumi Kojima
  • Patent number: 10765978
    Abstract: Shown is a filter in which powder aggregation (bridge) is hard to occur, and a time until a rise of differential pressure is caused is long, more specifically, a filtration life is long. The filter has a base material layer, a filtration layer and a skin layer, in which the base material layer is a layer formed by a nonwoven fabric being wound in a multiple manner, and subjected to the thermocompression bonding, the filtration layer is a layer formed by a laminate prepared by laminating at least a through-air nonwoven fabric and a net, being wound in a multiple manner, and subjected to no thermocompression bonding, the skin layer is a layer including a nonwoven fabric, and a mean pore diameter of the nonwoven fabric composing the base material layer and the skin layer is larger than a mean pore diameter of the through-air nonwoven fabric composing the filtration layer.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: September 8, 2020
    Assignees: JNC CORPORATION, JNC FILTER CO., LTD.
    Inventors: Daisuke Endo, Yozo Higuchi, Shinichi Tokudome, Kazuki Kanari
  • Publication number: 20190160406
    Abstract: A hollow cylindrical depth filter formed of fibers of a thermoplastic resin and having a thickness of a filter medium of 5 to 25 millimeters, in which the filter medium has a compression ratio of 0.2 or less when a load of 0.5 MPa is applied thereto, the filter medium has a fiber layer of at least three layers from a fluid inflow side toward an outflow side, porosity of the three layers are adjusted to a specific range, respectively, and intersection points of the fibers forming the filter medium are bonded, a mean interval between the intersection points is 2 to 100 times a mean fiber diameter of the fibers in a length direction, and a ratio of the mean fiber diameter on a surface on an upstream side to the mean fiber diameter on a surface on a downstream side of the filter medium is 0.9 to 1.2.
    Type: Application
    Filed: July 26, 2017
    Publication date: May 30, 2019
    Applicants: JNC Corporation, JNC Filter Co., Ltd.
    Inventors: Kouichi OZAMOTO, Kento NAKAMURA, Isamu FUTASE, Takumi KOJIMA
  • Patent number: 10130914
    Abstract: There is provided a pleated cartridge filter for high-purity chemicals that minimizes elution of metal from polyethylene into high-purity chemicals and is suitable mainly for a resist manufacturing process. A cylindrical pleated cartridge filter including a cylindrical core, a pleated filter material wound on the core, and caps sealing both ends of the core, wherein the pleated filter material is composed of a filtration membrane and a spacer laminated together, and the spacer is a nonwoven fabric made of polyethylene fibers having a metal element content of less than 40 ppm.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: November 20, 2018
    Assignees: JNC Corporation, JNC Filter Co., Ltd.
    Inventors: Yoshiichi Masuda, Takumi Kojima, Osamu Yamaguchi
  • Publication number: 20180085692
    Abstract: Shown is a filter in which powder aggregation (bridge) is hard to occur, and a time until a rise of differential pressure is caused is long, more specifically, a filtration life is long. The filter has a base material layer, a filtration layer and a skin layer, in which the base material layer is a layer formed by a nonwoven fabric being wound in a multiple manner, and subjected to the thermocompression bonding, the filtration layer is a layer formed by a laminate prepared by laminating at least a through-air nonwoven fabric and a net, being wound in a multiple manner, and subjected to no thermocompression bonding, the skin layer is a layer including a nonwoven fabric, and a mean pore diameter of the nonwoven fabric composing the base material layer and the skin layer is larger than a mean pore diameter of the through-air nonwoven fabric composing the filtration layer.
    Type: Application
    Filed: May 15, 2015
    Publication date: March 29, 2018
    Applicants: JNC CORPORATION, JNC FILTER CO., LTD.
    Inventors: Daisuke ENDO, Yozo HIGUCHI, Shinichi TOKUDOME, Kazuki KANARI
  • Publication number: 20170312693
    Abstract: There is provided a pleated cartridge filter for high-purity chemicals that minimizes elution of metal from polyethylene into high-purity chemicals and is suitable mainly for a resist manufacturing process. A cylindrical pleated cartridge filter including a cylindrical core, a pleated filter material wound on the core, and caps sealing both ends of the core, wherein the pleated filter material is composed of a filtration membrane and a spacer laminated together, and the spacer is a nonwoven fabric made of polyethylene fibers having a metal element content of less than 40 ppm.
    Type: Application
    Filed: March 13, 2017
    Publication date: November 2, 2017
    Applicants: JNC Corporation, JNC Filter Co., Ltd.
    Inventors: Yoshiichi Masuda, Takumi Kojima, Osamu Yamaguchi