Percolation media and its production manner which include the porous thin film which is supported by the base course

摘要

A filtration medium especially useful in cross-flow type filtration systems comprising a length of porous strong substrate, preferably woven, and a thin porous membrane, such membrane being bonded to the strands of the substrate by islands of resin uniformly spaced apart and disposed generally between the substrate and the membrane. The islands of resin enhance the integrity of the composite during its use in a filtration system. A method and apparatus for the manufacture of the filtration medium is disclosed.