Hydrophobic PTFE Membrane Filters Lab Disc Filters 25/50/100 pcs/pk

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Part No. MFPT-2213
Regular price $19.00 USD
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*Not for medical use

Cobetter hydrophobic PTFE membrane filters has broadest chemical compatibility and inertness and is mainly used for filtration of corrosive chemicals such as strong acid and alkali, finding applications in numerous industries, including pharmaceutical, biotech, food and beverage, and environmental monitoring.

Specifications

Materials Membrane PTFE
Wettability Hydrophobic
Color White
Physical Properties Filter Diameter 13/25/47/50/60/90/100/110/142/150/293 mm
Pore Size 0.1/0.22/0.45/1.0/3.0/5.0 μm
Maximum Operating Temp. 140°C
pH Range 1.0 – 14.0
Sterility Delivery Condition Nonsterile
Package Pack Size 100/pk, 50/pk, 25/pk

 

Performance

Pore Size Average Water Breakthrough (water 20°C) Air Flow Rate (@100ml*1in²*4.88in.water) Thickness (μm)
0.1 μm ≥450KPa ≤35s 200±60
0.22 μm ≥300KPa ≤35s 210±70
0.45 μm ≥150KPa ≤15s 210±80
3.0 μm ≥80KPa ≤10s 210±80
5.0 μm ≥30KPa ≤6s 250±50

Features

  • Naturally hydrophobic
  • Biologically and chemically inert
  • Strong chemical compatibility with pH range 1-14

Applications

  • Aerosol sampling
  • Air venting filtration
  • Filtration of strong acids and aggressive solutions
  • HPLC and organic solvent filtration

How to Choose a Membrane Filter

Medium, buffer filtration ---------- PES membrane

Low protein adsorption filtration --- PVDF membrane

Solvent mixture ------------------ Nylon or Hydrophilic PTFE membrane

Non-polar (hydrophobic) solution -- Hydrophobic PTFE membrane

Polar (hydrophilic) solution -------- Nylon membrane

Corrosive solution ---------------- Hydrophobic PTFE membrane

Gas filtration --------------------- Hydrophobic PTFE membrane

1. Which side of the membrane should face the sample?

The smooth side of the membrane should be in contact with the liquid sample.

2. What is the textured layer?

The textured layer is the polypropylene (PP) support layer of the membrane. This side should not come into contact with the sample.

3. What types of samples are suitable for hydrophobic PTFE membranes?

Hydrophobic PTFE membranes are ideal for air and gas filtration, solvent filtration, and sample venting. They are not suitable for aqueous solutions unless pre-wetted with alcohol or another compatible solvent.

4. How should I store unused filters?

Store in a clean, dry environment, away from direct sunlight and corrosive vapors. Recommended storage temperature is 15–30°C with low humidity.

5. What’s the difference between hydrophobic and hydrophilic PTFE membranes?

Hydrophobic PTFE is naturally hydrophobic and is used for gas/solvent filtration and venting.

Hydrophilic PTFE is modified to allow aqueous filtration without pre-wetting.