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US 2017/0361285 A1Published application
Porous hollow fiber membrane
AssigneeAsahi Kasei Medical Co., Ltd.
InventorsYuzo KAYAMA, Masayasu KOMURO
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Abstract
The present invention provides a porous hollow fiber membrane including a polysulfone-based polymer and a hydrophilic polymer, and having a dense layer in a section from an outer surface portion to a center region of a membrane thickness, a thickness of the dense layer being 10 to 30 μm, and a ratio of a pore having a pore size of more than 50 nm and a ratio of a pore having a pore size of 10 nm or smaller in the dense layer being 25 to 40% and 20% or less, respectively.
Claims18
1-6. (canceled)
A porous hollow fiber membrane comprising a polysulfone-based polymer and a hydrophilic polymer, and
- having a dense layer in a section from an outer surface portion to a center region of a membrane thickness, a thickness of the dense layer being 10 to 30 μm, and a ratio of a pore having a pore size of more than 50 nm and a ratio of a pore having a pore size of 10 nm or smaller in the dense layer being 25 to 40% and 20% or less, respectively.
Dependencies are inferred from the claim text.