Patent ID: 6773590
Filing Date: 2004-08-10
Classification: B01D,B29C,B29L,Y10T

Abstract:
A filtering membrane for separation of one substance from another substance, wherein at least one of said substances is a fluid, said membrane comprising:a first film made from a polymer material; a second film made from a polymer material; a plurality of welding seams that connect said first film to said second film and form at least a first closed cell and a second closed cell, said first closed cell and said second closed cell being interconnected through said welding seams penetrable only to said one substance and not penetrable to said another substance; said first closed cell having an inlet opening formed in said first film for the supply of said one substance and another substance into said first cell, said second closed cell having an output opening formed in said second film for discharge of said one substance penetrated into said second closed cell through said welding seams; said welding seams having a structure, which at least partially is an amorphous structure; at least one of said first film and said second film having crazes.