1，Polyethersulfone(PES): Hydrophilic membranes, high flow rate and high throughputs, low protein binding, low in extractables, and can be used to remove small particles, bacteria, viruses and fungi from aqueous phase. Normally used with pH range 3-12.
2，Nylon: Excellent chemical stability and flexibility, durable, hard to tear, can be sterilized in 121oC. Suitable for filtration of aqueous and most organic solvents, such as the water filtration of electronic, microelectronic, semiconductor industry, and also the filtration of culture media, drugs, drinks, and high-purity chemical. Normally used with pH range 3-14.
3，Hydrophobic Polytetrafluoroethylene (PTFE): Broad solvent chemical compatibility, excellent particle retention, and compatibility with various sterilizing methods. Suitable for both liquid and gas filtration. Normally used with pH range 1-14.
4，Hydrophobic Polyvinylidene fluoride (PVDF): High mechanical and tensile strength, and have broad chemical and temperature resistance. Not suitable for the filtration of acetone, DMSO, THF, etc. suitable for the filtration of gas, steam and high temperature liquids. Normally used with pH range 2-13
5，Hydrophilic Polytetrafluoroethylene (PTFE): Broad chemical resistance, excellent particle retention, and compatibility with various sterilizing methods. Suitable for the filtration of aggressive organic solvents, water solution containing strong acids or alkalis, and mixed solution of both. Normally used with pH range 1-14.
6，Hydrophilic Polyvinylidene fluoride (PVDF): Low protein binding, and have broad chemical and temperature resistance. The chemical compatibility of the membrane includes aggressive acids and alcohols. We do not recommend using this membrane for the filtration of acetone, DMSO, or bases > 6N. The filtration of dilute protein samples is recommended. Normally used with pH range 2-13.