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公开(公告)号：US10974199B2
公开(公告)日：2021-04-13
申请号：US16305540
申请日：2017-05-30
Applicant: TORAY INDUSTRIES, INC.
Inventor： Atsushi Kobayashi , Kenta Iwai , Masayuki Hanakawa , Tamotsu Kitade , Masahiro Kimura
Abstract: This hollow fiber membrane module is provided with: a cylindrical case having a first end and a second end in the direction of height; a plurality of hollow fiber membranes accommodated in the cylindrical case; and a first potting unit attaching the end parts of the plurality of hollow fiber membranes positioned at the first end of the cylindrical case while the end parts are open. The hollow fiber membranes have a rupture strength of 23 MPa or more. The filling rate for the hollow fiber membranes is 40-80%.
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公开(公告)号：US11141698B2
公开(公告)日：2021-10-12
申请号：US16066564
申请日：2016-12-26
Applicant: TORAY INDUSTRIES, INC.
Inventor： Shun Shimura , Kenta Iwai , Masayuki Hanakawa , Tamotsu Kitade , Masahiro Kimura , Atsushi Kobayashi , Aya Nishio
Abstract: The present invention provides a hollow fiber membrane module that can effectively resolve the accumulation of suspended solids within the membrane module, lower running costs, and also operate stably. The present invention relates to a hollow fiber membrane molecule provided with: a cylindrical case having a first end and a second end in the direction of height; a plurality of hollow fiber membranes accommodated within the cylindrical case; and a first potting part accommodated within the cylindrical case and attaching the plurality of hollow fiber membranes together such that the end parts of the plurality of hollow membrane fibers at a first end side of the cylindrical case are open. The hollow fiber membranes are porous hollow fiber membranes having a breaking strength of 23 MPa, and the hollow membrane module has a membrane area per unit volume of 800-3700 m2/m3. The filling fraction for the hollow fiber membranes in a cross-section orthogonal to the direction of height of the cylindrical case is 25-38%.
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公开(公告)号：US10456753B2
公开(公告)日：2019-10-29
申请号：US15755755
申请日：2016-06-24
Applicant: TORAY INDUSTRIES, INC.
Inventor： Takaaki Yasuda , Masayuki Hanakawa , Kenta Iwai , Toshiyuki Ishizaki , Tamotsu Kitade , Masahiro Kimura
Abstract: The present invention provides a porous hollow fiber membrane that has both high strength and high pure water permeability, and that exhibits excellent thermal deformation resistance. The present invention is related to a porous hollow fiber membrane containing a fluororesin-based polymer, and a manufacturing method of the membrane comprises a drawing step and a relaxing step. The porous hollow fiber membrane is characterized in that: the molecular chain of the polymer is oriented in the longitudinal direction of the hollow fiber membrane; and at the same time internal distortion of oriented non-crystalline chains, which is disadvantageous in terms of entropy, is alleviated.
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公开(公告)号：US09901883B2
公开(公告)日：2018-02-27
申请号：US15539355
申请日：2015-12-25
Applicant: TORAY INDUSTRIES, INC.
Inventor： Masayuki Hanakawa , Kenta Iwai , Toshiyuki Ishizaki , Tamotsu Kitade , Masahiro Kimura
CPC classification number: B01D71/34 , B01D67/0016 , B01D67/0018 , B01D67/0027 , B01D69/02 , B01D69/08 , B01D71/32 , B01D2323/08 , B01D2325/02 , B01D2325/24 , B01D2325/30 , B01D2325/32 , B01D2325/34
Abstract: An object of the present invention is to provide a porous hollow-fiber membrane having high strength while maintaining high pure-water permeation performance. A porous hollow-fiber membrane of the present invention is a porous hollow-fiber membrane including a fluororesin-based polymer, in which the porous hollow-fiber membrane has a columnar texture oriented in a longitudinal direction of the porous hollow-fiber membrane, and a molecular chain of the fluororesin-based polymer is oriented in the longitudinal direction of the porous hollow-fiber membrane.
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公开(公告)号：US11077407B2
公开(公告)日：2021-08-03
申请号：US16305757
申请日：2017-05-30
Applicant: TORAY INDUSTRIES, INC.
Inventor： Kenta Iwai , Masayuki Hanakawa , Tamotsu Kitade , Masahiro Kimura , Toshiyuki Ishizaki
Abstract: The porous hollow-fiber membrane of the present invention comprises a fluororesin polymer, and has columnar structures oriented in the longitudinal direction thereof. In the porous hollow-fiber membrane, molecular chains of the fluororesin polymer have been oriented in the longitudinal direction of the porous hollow-fiber membrane and have an average value ν of Raman orientation parameter of 1.5-4.0.
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Patent Agency Ranking
公开(公告)号：US10766007B2
公开(公告)日：2020-09-08
申请号：US16066564
申请日：2016-12-26
Applicant: TORAY INDUSTRIES, INC.
Inventor： Shun Shimura , Kenta Iwai , Masayuki Hanakawa , Tamotsu Kitade , Masahiro Kimura , Atsushi Kobayashi , Aya Nishio
Abstract: The present invention provides a hollow fiber membrane module that can effectively resolve the accumulation of suspended solids within the membrane module, lower running costs, and also operate stably. The present invention relates to a hollow fiber membrane molecule provided with: a cylindrical case having a first end and a second end in the direction of height; a plurality of hollow fiber membranes accommodated within the cylindrical case; and a first potting part accommodated within the cylindrical case and attaching the plurality of hollow fiber membranes together such that the end parts of the plurality of hollow membrane fibers at a first end side of the cylindrical case are open. The hollow fiber membranes are porous hollow fiber membranes having a breaking strength of 23 MPa, and the hollow membrane module has a membrane area per unit volume of 800-3700 m2/m3. The filling fraction for the hollow fiber membranes in a cross-section orthogonal to the direction of height of the cylindrical case is 25-38%.
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公开(公告)号：US11235989B2
公开(公告)日：2022-02-01
申请号：US16312768
申请日：2017-06-23
Applicant: TORAY INDUSTRIES, INC.
Inventor： Shun Shimura , Masayuki Hanakawa , Kenta Iwai , Tamotsu Kitade , Masahiro Kimura
Abstract: The present invention relates to a composite porous hollow-fiber membrane including a first layer and a second layer which each include a fluororesin-based polymer, in which at least a part of molecular chains of the fluororesin-based polymer is oriented in a longitudinal direction of the composite porous hollow-fiber membrane, the molecular chains of the fluororesin-based polymer have a degree of orientation it in the longitudinal direction of the composite porous hollow-fiber membrane of 0.4 or higher but less than 1.0, the degree of orientation it being calculated with the specific formula.
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公开(公告)号：US11065580B2
公开(公告)日：2021-07-20
申请号：US16346027
申请日：2017-10-24
Applicant: TORAY INDUSTRIES, INC.
Inventor： Yoshiki Okamoto , Akshay Garg , Kentarou Takagi , Hiroho Hirozawa , Tamotsu Kitade
Abstract: According to the present invention, even when a high recovery ratio operation is performed, the influence of concentration of ingredients to be separated in the feed fluid can be reduced, the concentration polarization can be prevented by increasing the turbulence effect on the membrane surface, and the fluid permeation performance and the separation performance of the separation membrane element can be maintained.
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公开(公告)号：US11020709B2
公开(公告)日：2021-06-01
申请号：US16312852
申请日：2017-06-23
Applicant: TORAY INDUSTRIES, INC.
Inventor： Shun Shimura , Kenta Iwai , Masayuki Hanakawa , Tamotsu Kitade , Masahiro Kimura
Abstract: The present invention relates to a composite porous hollow-fiber membrane including a first layer and a second layer which each include a fluororesin-based polymer, in which the first layer has a columnar texture oriented in a longitudinal direction of the composite porous hollow-fiber membrane, the columnar texture has an average value v of a Raman orientation parameter calculated with the specific formula, and the second layer has a three-dimensional network texture and has an average surface-pore diameter of 5.0 nm to 5.0 μm.
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公开(公告)号：US10702834B2
公开(公告)日：2020-07-07
申请号：US15324399
申请日：2015-07-07
Applicant: TORAY INDUSTRIES, iNC.
Inventor： Kenta Iwai , Toshiyuki Ishizaki , Tamotsu Kitade , Kenji Komori , Masayuki Hanakawa
IPC: B01D71/34 , D01D5/24 , D01F6/12 , C08J5/18 , B01D69/08 , B01D69/02 , B01D69/06 , B01D61/14 , B01D67/00
Abstract: An object of the present invention is to provide a separation membrane having high mechanical strength and being less likely to cause clogging and capable of continuously maintaining high water permeation performance. The present invention relates to a separation membrane characterized in that the average diameter D1 of a spherical structure in a region within 10 μm from a first surface in a separation membrane having a spherical structure layer formed of a thermoplastic resin and the average diameter D2 of a spherical structure in a region of 10 μm to 20 μm from a second surface satisfy the relational expression of D1>D2 and the average diameter D1 and the average diameter D3 of a spherical structure in a third region satisfy the relational expression of 1.10
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