PTFE Membrane Filter Discs, 0.22um, 25mm, Hydrophobic, Nonsterile, 100/Pk
GVS SKU: 1215486

Featuring a hydrophobic polytetrafluoroethylene (PTFE) membrane laminated to a polypropylene support, these 25mm discs deliver very small particulate capture at a 0.22um pore size while standing up to strong acids and aggressive solvents. The PTFE fine powder resin is expanded into a three-dimensional, web-like structure that creates billions of microscopic pores, providing a consistent, chemically resistant barrier to particulate and microbes. The polypropylene lamination adds mechanical strength for easy handling, and the discs are autoclavable to 130 degrees C.

Key PTFE Membrane Characteristics

• Naturally hydrophobic and non-stick, so the membrane will not absorb moisture from air or gases, making it ideal for venting and phase separation applications.
• Broad chemical compatibility with strong acids, alcohols, hydrocarbons, alkalis, and most aggressive solvents.
• Expanded three-dimensional PTFE structure provides billions of microscopic pores for reliable surface capture of fine particulate.
• Can be used to filter aqueous solutions when prewetted with a solvent such as methanol.
• Optimal combination of air flow and water entry pressure for demanding device and laboratory designs.

Key Construction Characteristics

• PTFE membrane laminated to a polypropylene support for improved durability and handling.
• 0.22um pore size on a 25mm diameter disc.
• Plain white, ungridded membrane.
• Autoclavable to 130 degrees C.
• Supplied nonsterile, 100 discs per pack.

These discs maintain consistent particulate retention and chemical integrity across repeated use in harsh chemical environments. Their hydrophobic nature preserves sample and gas-stream integrity in venting and aerosol applications, while the laminated polypropylene backing keeps handling simple and tear-resistant.

Color

White

Construction

PTFE membrane laminated to polypropylene support

Diameter

25mm

Grid (Yes/No)

No

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Temperature (°C)

130

Membrane Color

White

Pack Count

100

pH Range

1-13

Pore Size (µm)

0.22

Sterility

Nonsterile

Sterilization

Autoclavable to 130 C

Support Material

Polypropylene (PP)

Vent (Yes/ No)

Yes

Wettability

Hydrophobic

• Aggressive Solvent and Acid Filtration Provides broad chemical compatibility for filtering strong acids, alcohols, and aggressive organic solvents that would degrade other membranes.
• Air and Gas Venting The hydrophobic membrane allows air and gases to pass while blocking moisture, making it well suited to vent filtration on vessels and tanks.
• Aerosol Sampling Captures fine airborne particulate on the membrane surface for air monitoring and aerosol collection.
• Phase Separations The non-wetting PTFE structure separates aqueous and organic phases in sample preparation.
• Particulate Removal from Gas Streams Collects particulate as small as 0.1 micron on its surface to protect downstream components in gas-handling systems.
• Aqueous Filtration (Prewetted) Filters aqueous solutions after prewetting the membrane with a solvent such as methanol.