Liquid filter with a permeable flat film membranes, the projecting parts have.

摘要

This invention relates to a flat film permeative membrane having a plurality of very small protrusions on at least one of its surface. When this membrane is assembled in a lamination type module, these protrusions formed on the membrane surface form stable and appropriate fluid paths between the membranes so that the module can be made compact and its performance can be improved. This membrane is suitable particularly for a permeative membrane for use in a bodily fluid filter such as a plasma separator.