... Cellulose Ester (MCE)uniform apertureno fiber migrationnaaturally hydrophilic0.22, 0.4513, 25, 33Plyfluortetraethylene (PTFE)broad ... chemical compatibilitystrong chemical stability and inertiastrong hydrophobicity0.22, 0.4513, 25, 33Polyvinylidene Fluoride (PVDF) ... chemical compatibility to organic solventshighly solvent resistant0.22, 0.4513, 25Glass Fiberhydrophilic material membrandexcellent ...