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Hydrophobic ePTFE Membrane

Cobetter expanded ePTFE membrane has strong chemical compatibility with pH 1-14, and is suitable for filtration of corrosive chemicals such as strong acids and bases. The ePTFE membrane features natural hydrophobic and high specific surface area. It can ensure air pass while blocking the flow of liquids, making it suitable for air filtration or water blocking and breathable applications. Cobetter also provides ePTFE membranes with oil repellent treatment. In addition to preventing water pass, it can effectively prevent liquids with low surface tension such as esters, alcohols, and oils from infiltrating and maintaining excellent air permeability. Cobetter ePTFE oleophobic membrane meets the requirements of PFOA in the EU REACH regulation. In response to the sealing process with different shells and the diversity of plastic shell materials, Cobetter has studied the welding applicability of membrane materials with various common plastics, and developed various specifications of support materials and membrane composites to be suitable for complex instrument assembly processes. Cobetter ePTFE membrane can be adapted to various assembly methods such as backing adhesive, compression bonding, hot melt welding, ultrasonic welding, etc. It can be welded with materials such as ABS resin, polypropylene, PMMA and PC, etc.
Recommended Applications:
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Description

Features

  • Natural hydrophilic, preferred choice for air filtration and venting
  • Process friendly, wide adaptability for shell assembly
  • Can be oleophobic treatment
  • Excellent bacterial/viral aerosol and solid particle blocking performance


Applications

  • IV filter vent
  • Vacuum drainage
  • Sterile filtration or virus removal of air 

Specifications

Hydrophobic ePTFE Membrane

Pore Size
[μm]
Water Pressure
[kPa]
(water 20°C)
Air Flow Rate
[1in2 * 4.88in.water]
Support Layer Recommended Welding Method Sterilization Method
0.02 μm ≥450kPa ≤70s@100ml Polyester/Polyolefin Backing adhesive / Thermo / Ultrasonic Welding Autoclave/ ETO
0.22 μm ≥300kPa ≤45s@100ml
0.45 μm ≥150kPa ≤15s@100ml
1.0 μm ≥70kPa ≤6s@100ml
3.0 μm ≥40kPa ≤3.5s@100ml
5.0 μm ≥30kPa ≤2s@100ml
10.0 μm ≥20kPa ≤1.5s@100ml


Oleophobic ePTFE Membrane

Pore Size
[μm]
Water Pressure
[kPa]
(water 20°C)
Air Flow Rate
[1in2 * 4.88in.water]
Oleophobic Class Recommended Welding Method Sterilization Method
0.02 μm ≥450kPa ≤85s@100ml ≥6 Backing adhesive / Thermo / Ultrasonic Welding Autoclave/ ETO
0.22 μm ≥300kPa ≤45s@100ml ≥6
0.45 μm ≥150kPa ≤15s@100ml ≥6
1.0 μm ≥70kPa ≤7s@100ml ≥6
3.0 μm ≥40kPa ≤3.5s@100ml ≥6
5.0 μm ≥25kPa ≤2s@100ml ≥6
10.0 μm ≥20kPa ≤1.5s@100ml ≥6


Ordering Information

Available in rolls, sheets, Disc, adhesive backing, and can be customized.

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