ePTFE Membrane, ePTFE, 0.22 μm (CAT#: STEM-BC-0124-ZJF)

The ePTFE membrane is a hydrophobic expanded polytetrafluoroethylene membrane designed for air filtration, venting, and liquid barrier applications. Its natural hydrophobicity allows gas passage while blocking water penetration. The membrane provides strong chemical compatibility and can be used with corrosive chemicals. It is suitable for infusion devices, drug delivery devices, negative pressure drainage systems, and gas sterilization or virus filtration applications. Oleophobic treatment options are available for resistance to low-surface-tension liquids such as esters, alcohols, and oils. The membrane can be combined with support materials to improve assembly compatibility. It can be assembled using adhesive backing, compression, heat welding, or ultrasonic welding. The membrane is compatible with common plastic housings used in device assembly.

Material: Expanded polytetrafluoroethylene ePTFE
Membrane type: Hydrophobic or oleophobic
Pore size options: 0.02 μm, 0.22 μm, 0.45 μm, 1.0 μm, 3.0 μm, 5.0 μm, 10.0 μm
Water intrusion pressure: ≥20 to ≥450 kPa depending on pore size
Air flow rate: ≤1.5 s to ≤70 s at 100 mL depending on pore size
Optional support materials: Polyester or polyolefin
Oleophobic grade: ≥6 for oleophobic versions
Assembly methods: Adhesive backing, heat welding, ultrasonic welding, compression fitting
Recommended sterilization: Autoclave or ETO
Chemical compatibility: pH 1 to 14

Naturally hydrophobic and water-blocking
Allows gas venting while resisting liquid penetration
Oleophobic treatment available
Strong bacterial and viral aerosol retention potential
Good solid particle retention performance
Broad housing assembly compatibility
Multiple support material options
Suitable for air filtration and vent membrane applications

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