Membrane Polytetrafluoroethylene (PTFE) Hydrophilic Polyvinylidene Difluoride (Hydrophilic PVDF) Regenerated Cellulose (RC) Cellulose Acetate (CA) Mixed Cellulose Esters (MCE) Nylon Polyethersulfone (PES) PCTE (Polycarbonate Track Etched) Polyester Track Etched (PETE) Polypropylene (PP)