Porous membrane and method for manufacturing the same
AssigneeToray Industries, Inc.
InventorsHirofumi Morikawa, Shin-Ichi Minegishi, Shuji Furuno, Toshyuki Ishizaki, Masahiro Henmi
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Abstract
The object of the present invention is to provide a porous membrane having a high strength and excellent water permeability and rejection properties. The porous membrane of the present invention has both a three-dimensional network structure and a spherical structure. The porous membrane of the present invention is suitably used for water treatment membranes, battery separators, charged membranes, fuel cells, blood purification membranes, and the like.
Claims23
A porous membrane having both a three-dimensional network structure and a spherical structure.
A method for manufacturing a porous membrane having both a three-dimensional network structure and a spherical structure, the method comprising the steps of:
- dissolving a thermoplastic resin in a solvent;
- and discharging the resin solution from an extrusion head into a cooling liquid to solidify the resin solution, thereby producing the porous membrane, wherein different compositions of the cooling liquid are respectively uses for one surface side of the porous membrane and the other surface side.
A method for manufacturing a porous membrane having both a three-dimensional network structure and a spherical structure, the method comprising the step of forming the three-dimensional network structure on at least one surface of a porous membrane having the spherical structure.
A method for manufacturing a porous membrane having both a three-dimensional network structure and a spherical structure, the method comprising the steps of:
- simultaneously discharging a resin solution for forming the three-dimensional network structure and a resin solution for forming the spherical structure from an extrusion head, followed by solidification.
Dependencies are inferred from the claim text.