Inventors:
Robert Ieraci - Franklin Square NY, US
Thomas K. Hartmann - Huntington Station NY, US
David Newman - Marlton NJ, US
Nicholas Zerilli - Flushing NY, US
Assignee:
Pall Corporation - East Hills NY
International Classification:
B01D 39/00
B01D 29/46
B29C 65/00
US Classification:
21050036, 21050027, 210490, 156247, 264DIG 47
Abstract:
A porous fluoropolymer membrane comprising a first surface, a second surface, nodes and free fibrils, wherein one of the first and second surfaces has a greater number of free fibrils per unit area of the surface than the other of the first and second surfaces, is disclosed. A process for preparing porous fluoropolymer membranes is also disclosed, comprising splitting a thicker membrane in a dimension different from, e. g. , perpendicular to, its thickness dimension.