초록 ▼

There is disclosed a novel porous hollow fiber membrane which is characterized by such a unique porous structure that the inner and outer membrane surfaces have an in-a-plane average pore diameter of 0.01 to 10 m

There is disclosed a novel porous hollow fiber membrane which is characterized by such a unique porous structure that the inner and outer membrane surfaces have an in-a-plane average pore diameter of 0.01 to 10 m

대표청구항 ▼

A porous hollow fiber membrane comprising structure enabling essentially complete removal of a virus from a solution containing a virus at commercially acceptable filtration rates, including a porous polymer wall having a substantially annular cross-section and a hollow space defined by the inner wa

A porous hollow fiber membrane comprising structure enabling essentially complete removal of a virus from a solution containing a virus at commercially acceptable filtration rates, including a porous polymer wall having a substantially annular cross-section and a hollow space defined by the inner wall surface of said porous polymer wall which hollow space extends in the longitudinal direction of said porous polymer wall, said porous polymer wall having pores which form through-passages passing from the inner wall surface to the outer wall surface of said polymer wall, and wherein the inner and outer wall surfaces of said porous polymer wall have an in-a-plane average pore diameter of 0.01 to 10 m10% measured in every plane perpendicular to a radial direction of said annular cross-section, said in-a-plane porosity varying continuously between said inner wall surface and said outer wall surface, wherein said in-a-plane porosity increases in the vicinity of each of said inner and outer wall surfaces and exhibits at least one minimum value between said inner and outer wall surfaces, said in-a-plane porosity at each of said inner and outer wall surfaces being at least 1.5 times the lowest value of the in-a-plane porosity within said porous polymer wall.