| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sheet-like separation membrane which can assure a sufficient flow passage on its surface, can attain a sufficient turbulent effect on its surface, and suffers little from flow unevenness and to provide a separation membrane element using the same. Ž<P>SOLUTION: The present invention provides the sheet-like separation membrane having a plurality of protrusions 1 as islands separated from each other on the permeation side or the feed side, wherein in each of the protrusions 1, the shortest length D2 passing the gravitational center of its upper surface is larger than the shortest distance D3 between the adjoining protrusions 1. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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