PTFE membrane is manufactured in a unique way where polytetrafluorethylene (PTFE) is expanded both uniaxially and biaxially.  The resultant membrane is thin, highly porous, and behaves as an absolute retentive membrane.  

Unsupported PTFE membranes offer maximum chemical and pH resistance to a broad range of aqueous and organic solvents making it an optimal membrane to sterilize and clarify strong acids and many solvents incompatible with other membranes.  Since PTFE is inherently hydrophobic these membranes are used to sterilize gases and trap aqueous aerosols.  When used in venting applications, they allow the gases to pass freely while blocking aqueous liquids thereby protecting pumps and critical samples. 

Key Features

• Thin, highly porous, and behaves as an absolute retentive membrane
• Non-supported
• Inert to most chemically aggressive solvents, strong acids and bases
• Operating temperature range: -120 to 260 °C
• Available in Cartridge, capsule and disposable syringe filter formats
• Pore size: 0.1, 0.2, 0.5, 0.8,1.0 and 3.0 um 
• Diameter: 13 mm, 25 mm, 47mm, 90 mm, 142 mm, 185 mm and 293 mm.
• Autoclavable  

Typical Applications

• Ideal for HPLC and other mixtures of aqueous and organic solvents 
• Cell culture and microscopic examination 

NOTE:  Hydrophilic PTFE membrane filters are not autoclavable.  Allowing the membrane to dry will render it hydrophobic