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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
IPC分类号： B01D33/21 , B01D39/00 , B01D39/14 , B01D71/26 , B01D63/02 , B01D71/34 , B01D69/08 , B01D69/02
CPC分类号： 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
摘要： 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：US20220056235A1
公开(公告)日：2022-02-24
申请号：US17413734
申请日：2019-12-24
发明人： Shun Shimura , Masayuki Hanakawa , Kenta Iwai , Takaaki Yasuda
摘要： The present invention relates to a porous membrane including a polymer including a polyvinylidene fluoride-based resin as a main component, and a branched polyvinylidene fluoride-based resin as the polyvinylidene fluoride-based resin, in which the polymer has a value of a of 0.32 to 0.41 and a value of b of 0.18 to 0.42, each of which is determined by approximation according to the formula 1 below from a radius of gyration 1/2 and an absolute molecular weight Mw of the polymer which are measured by GPC-MALS (gel permeation chromatograph equipped with a multi-angle light scattering detector). 1/2=bMwa (Formula 1)
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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
摘要： 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：US20150021260A1
公开(公告)日：2015-01-22
申请号：US14379435
申请日：2013-02-19
发明人： Kenta Iwai , Shuji Furuno , Yoshifumi Odaka , Kenji Komori , Yasuharu Watanabe , Atsushi Kitanaka , Seiko Kantani , Hideaki Ando
CPC分类号： B01D63/084 , B01D63/082 , B01D69/10 , B01D2311/2665 , B01D2313/146 , B01D2315/06 , B01D2319/04
摘要： A separation membrane element including a pair of separation membranes containing two separation membranes arranged so that the filtrate-side surfaces thereof are disposed in mutually opposed relation, and a plurality of resin members bonded to both of the mutually opposed filtrate-side surfaces, a peripheral edge of the pair of separation membranes being sealed.
摘要翻译： 一种分离膜元件，包括一对分离膜，其包含两个分离膜，其布置成使得其滤液侧表面彼此相对地设置，并且多个树脂构件接合到两个相互相对的滤液侧表面，周边 一对分离膜的边缘被密封。
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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
摘要： 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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公开(公告)号：US11058996B2
公开(公告)日：2021-07-13
申请号：US16079837
申请日：2017-02-24
摘要： An object of the present invention is to provide a porous hollow-fiber membrane satisfying both high strength and high pure-water permeation performance and at the same time, having high bending resistance. The present invention relates to 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 when a photograph of a cross-section parallel to the longitudinal direction of the porous hollow-fiber membrane is binarized into a structure portion and a void portion, the following 1) and 2) are satisfied: 1) a proportion of an area of the void portion is from 20 to 50%, and 2) a value obtained by dividing a total of peripheral lengths of the void portions by a total of areas of the void portions is 2.0 μm−1 or less.
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公开(公告)号：US10766007B2
公开(公告)日：2020-09-08
申请号：US16066564
申请日：2016-12-26
发明人： Shun Shimura , Kenta Iwai , Masayuki Hanakawa , Tamotsu Kitade , Masahiro Kimura , Atsushi Kobayashi , Aya Nishio
IPC分类号： B01D63/02 , B01D65/02 , B01D69/02 , B01D71/34 , B01D65/08 , C02F1/44 , B01D67/00 , B01D69/08
摘要： 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：US10040033B2
公开(公告)日：2018-08-07
申请号：US15103591
申请日：2014-11-27
IPC分类号： B01D39/00 , B01D29/00 , B01D29/46 , B01D69/12 , B01D69/02 , C02F1/28 , C02F1/44 , B32B27/06 , B01J20/26 , B01J20/28 , B01J20/32 , B01D67/00 , B01D69/08 , C02F101/10 , C02F101/20
摘要： An object of the present invention is to provide a multilayer separation membrane having excellent performance on both removal of suspended solids in water and adsorptive removal of metal ions in water. A multilayer separation membrane of the present invention includes: a porous adsorption layer including substantially a polymer having chelating functional groups; and a porous clarification layer, and the porous clarification layer is disposed neater to a raw water-side than the porous adsorption layer.
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公开(公告)号：US12097470B2
公开(公告)日：2024-09-24
申请号：US17413734
申请日：2019-12-24
发明人： Shun Shimura , Masayuki Hanakawa , Kenta Iwai , Takaaki Yasuda
CPC分类号： B01D67/0011 , B01D67/0016 , B01D69/02 , B01D69/1071 , B01D69/108 , B01D69/12 , B01D71/34 , C08J9/0061 , C08J9/28 , C08L27/16 , B01D2325/02832 , B01D2325/02833 , B01D2325/20 , B01D2325/34 , B01D2325/36 , C08J2201/0544 , C08J2327/16
摘要： The present invention relates to a porous membrane including a polymer including a polyvinylidene fluoride-based resin as a main component, and a branched polyvinylidene fluoride-based resin as the polyvinylidene fluoride-based resin, in which the polymer has a value of a of 0.32 to 0.41 and a value of b of 0.18 to 0.42, each of which is determined by approximation according to the formula 1 below from a radius of gyration 1/2 and an absolute molecular weight Mw of the polymer which are measured by GPC-MALS (gel permeation chromatograph equipped with a multi-angle light scattering detector). 1/2=bMwa (Formula 1).
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公开(公告)号：US20230046432A1
公开(公告)日：2023-02-16
申请号：US17791991
申请日：2021-01-25
发明人： Shun Shimura , Masayuki Hanakawa , Kenta Iwai
摘要： The present invention relates to a method of filtering an oil, the method including the following steps (A) and (B): (A) allowing a hydrophobic gas to permeate through a porous membrane including a hydrophobic polymer as a main component; and (B) allowing an oil to permeate through the porous membrane, in which the step (B) is performed after the hydrophobic gas that has permeated through the porous membrane is confirmed to have a relative humidity of 0 to 60% in the step (A).
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