MULTIPOROUS HOLLOW-FIBER MEMBRANE AND PROCESS FOR PRODUCING MULTIPOROUS HOLLOW-FIBER MEMBRANE

摘要

The present invention relates to a multiporous hollow-fiber membrane which comprises a thermoplastic resin and in which the outer surface has pores with an aspect ratio of 10 or higher and the inner surface has pores with an aspect ratio of 1-5, the polymer that forms the outer-surface pores having a cell wall thickness of 1-20 μm.