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公开(公告)号：US20170266626A1
公开(公告)日：2017-09-21
申请号：US15506521
申请日：2015-08-25
Applicant: ASAHI KASEI MEDICAL CO., LTD.
Inventor： Yuzo KAYAMA , Masayasu KOMURO , Tetsuya HAMASAKI
CPC classification number: B01D69/08 , B01D67/0009 , B01D67/003 , B01D67/0088 , B01D69/00 , B01D69/02 , B01D69/06 , B01D71/06 , B01D71/28 , B01D71/34 , B01D71/68 , B01D2323/02 , B01D2323/06 , B01D2323/22 , B01D2325/02 , B01D2325/20 , B01D2325/36 , C08J2201/0464
Abstract: The object of the present invention is to provide a porous membrane by which a useful component can be recovered while suppressing the clogging during filtration of a protein solution and from which only a small amount of an eluate is eluted even when an aqueous solution is filtered.The present invention provides a porous membrane containing a hydrophobic polymer and a water-insoluble hydrophilic polymer, the porous membrane having a dense layer in the downstream portion of filtration in the membrane, having a gradient asymmetric structure in which the average pore diameter of fine pores increases from the downstream portion of filtration toward the upstream portion of filtration, and having a gradient index of the average pore diameter from the dense layer to the coarse layer of 0.5 to 12.0.
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公开(公告)号：US20210197133A1
公开(公告)日：2021-07-01
申请号：US17204203
申请日：2021-03-17
Applicant: ASAHI KASEI MEDICAL CO., LTD.
Inventor： Yuzo KAYAMA , Masayasu KOMURO , Tetsuya HAMASAKI
Abstract: A porous membrane containing a hydrophobic polymer and a water-insoluble hydrophilic polymer, the porous membrane having a dense layer in the downstream portion of filtration in the membrane, having a gradient asymmetric structure in which the average pore diameter of fine pores increases from the downstream portion of filtration toward the upstream portion of filtration, and having a gradient index of the average pore diameter from the dense layer to the coarse layer of 0.5 to 12.0.
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