SEPARATION MEMBRANE, SEPARATION MEMBRANE ELEMENT, AND METHOD FOR PRODUCING SEPARATION MEMBRANE

摘要

The present invention provides a separation membrane having a plurality of concavoconvex parts which have a height difference of from 100 µm to 2000 µm and are formed on at least one surface of the separation membrane, in which an average value d1 of a minimum thickness and an average value d2 of a maximum thickness in the concavoconvex parts satisfy the following relational expression [1]: 0.8 ‰¤ d1/d2 ‰¤ 1.0.