PETE (Polyester) Membranes
Hydrophilic Polyester (PETE) Membrane Filters
PETE Membrane Filter Applications
Precise General Filtration and Prefiltration
Removal of red blood cells from plasma
Flow control of reagents through assay
PETE Membrane Filter Specifications
General
| USP Class VI Testing | Passed |
| Sterilization | Gamma Irradiation, EtO, Autoclave |
| Wetting Characteristics | Naturally Hydrophilic |
| BSA Protein Binding | < 5 μg/cm2 |
| Extactables | Very Low |
| Max. Operating Temp | 140 °C (284 °F) |
| Sealing Compatibility | Ultrasonic, Heat, Radio Frequency, and Insert Molding |
| pH Range | 4-8 |
| Burst Strength Min. | 0.7 bar (10 psi) |
Performance by Pore Sizea
| Pore Densityb (pores/cm2) | Open Area (%) | Nom. Thicknessc (µm) | Nom. Weight (mg/cm2) | Bubble Pointd (psi) | Water Flow Ratee (mL/min/cm2 | Air Flow Ratef (L/min/cm2) | |
| 0.1 µm | 4 x 108 | 3.1 | 10 | 0.8 | 30 | 2.5 | 1.5 |
| 0.2 µm | 3 x 108 | 9.4 | 10 | 1.3 | 20 | 10 | 3 |
| 0.4 µm | 1 x 108 | 12.6 | 10 | 1.2 | 12 | 33 | 7.5 |
| 0.4 µm transparent | 2 x 106 | 0.3 | 12 | 1.7 | – | – | – |
| 0.8 µm | 3 x 107 | 15.1 | 9 | 1.1 | 7 | 90 | 18 |
| 1.0 µm | 2 x 107 | 15.7 | 11 | 1.3 | 6 | 130 | 20 |
| 2.0 µm | 2 x 106 | 6.3 | 10 | 1.3 | 3 | 300 | 16.5 |
| 3.0 µm | 2 x 106 | 14.1 | 9 | 1.1 | 2 | 440 | 37.5 |
| 3.0 µm transparent | 6 x 105 | 4.2 | 12 | 1.6 | – | – | – |
| 5.0 µm | 4 x 105 | 7.9 | 10 | 1.3 | 1.2 | 700 | 30 |
| 8.0 µm | 1 x 105 | 5.0 | 7 | 1.0 | 0.7 | 1000 | 30 |
| 10.0 µm | 1 x 105 | 7.9 | 9 | 1.3 | 0.9 | 1150 | 34.5 |
*Notes:
Tolerance + 0%, -20%
Tolerance +/-15%
Tolerance +/-10%
Measured using isopropanol (IPA)
Initial flow rates using prefiltered water at 10 psi (0.7 kg/cm2)
Initial flow rates using prefiltered air at 10 psi (0.7 kg/cm2) for pore sizes <= 2 µm and 5 psi (0.35 kg/cm2) for pore sizes >= 3 µm
Hydrophobic Polyester (PETE) Membrane Filters
Applications
Vent filters for electrical enclosures
Vent filters for microbial retention in medical devices
Air/gas filtration while repelling liquid water
Air/gas filtration while repelling oils and solvents with surface tension >25 dynes/cm
Specifications
| Membrane material | Polyethylene terephthalate (PET) laminated with nonwoven PET |
| Pore size | 0.2 µm* |
| Pore density | 2.7×10⁸ – 3.7×10⁸ pores/cm² |
| Air flow | 2.5 – 4.9 L/min·cm2 at 1.0 bar |
| Water entry pressure | ≥3.5 bar |
| Thickness | 90 – 190 µm |
| Oil repellency | AATCC Grade 5 |
*Tolerance of ±20%
PETE (Polyester) Gold-Coated Membranes
Features
Particle analysis by SEM/EDX, FTIR microscopy and Raman spectroscopy
Identification and characterization of micro-and nanoparticles in pharmaceutical fluids and chemical auxiliary agents
Testing for technical cleanliness in accordance with ISO 16232 and VDA 19
Stable in liquid medium for longer filtration periods
High contrast in SEM, FTIR microscopy and Raman spectroscopy
Gold-coated on top side (100/0 nm)
Specifications
| Pore Size | Membrane Material | Pore Density (cm-2) | Membrane thickness (µm) | Gold coating (top/down) |
| 0.8µm | Polyester | 4.00 E + 07 | 22 | 100/0 nm |
| 3.0µm | Polyester | 3.00 E + 06 | 20 | 100/0 nm |
| 5.0µm | Polyester | 4.00 E + 05 | 19 | 100/0 nm |
Polyester Drain Discs
Polyester Drain Disk Nominal Specifications
| Material | Polyethylene Terephthalate |
| Sterilization | Gamma Irradiation, Ethylene Oxide, Autoclave |
| Wetting Characteristics | Naturally Hydrophilic |
| pH Range | 4-8 |
| Max. Operating Temp | 140°C (284°F) |
| Basis Weight | 36±3g/m² (1.06±0.09oz/yd²) |
| Thickness | 65±15µm (2.56±0.59mil) |
| Gurley Air Permeability | 0.13 sec/100cc — corresponds to 7.2L/min·cm2 at 1.21kPa |
Dyed Polyester Membranes
| Pore Size (µm) | Thickness (µm) | Porosity (%) | Bubble Point | Pore Density cm2 | Water Flow Ratee indicative values ml/min/cm2 @0.7bar | Air Flow Ratef indicative values L/min/cm2 @0.7bar |
| 0.2 µm | 25 (µm) | 15.70% | >3.5 bar | – | >10 | >2 |
| 0.4 µm | 25 (µm) | 18.80% | >2 bar | 1.50 E+08 | >30 | >4 |
| 0.8 µm | 24 (µm) | 20.10% | >0.6 bar | 4.00 E+07 | >80 | >8 |
| 3.0 µm | 22 (µm) | 21.20% | >0.05 bar | 3.00E +06 | >400 | >30 |