Polyester track-etched membrane is available in roll format up to 32 cm wide with a range of standardized production parameters as well as with custom properties designed to meet your application requirements. Customizable parameters include the surface TEM and/or bubble-point pore sizes, pore angle distributions, surface pore distribution geometries and membrane thickness. A range of surface modifications are available upon request, including metal (Ag, Ti, stainless steel) and oxide coating (titanium dioxide and oxynitride, nickel oxide).
Pore size
0,05 μm - 7 μm
Thickness
7 μm - 23 μm
Porosity
up to 15%
Angular distribution of pores
Straight perpendicular
pores
pores
Parallel tilted at
a certain angle
a certain angle
+45° / -45°
Multi-angles
(from -45° to +45°)
(from -45° to +45°)
Blind “non-through”
pores
pores
Individual pore geometries
Cylindrical pores1
Doubly-conical pores2
Cigar-shaped pores3
Asymmetrical pores with non-linear ion-current characteristics4
Micro-well shaped pores with porous bottom5
1-5 For more information regarding the
copyrighted material, please
click here
Features and Benefits
of PET membranes
Smooth, planar surface and small thickness
Precise pore size and density
Low hygroscopicity
High hygroscopicity
Biologically inert
Possibility of regeneration via tangential flow or pulsed reverse flow
Stability at temperatures used in cryogenic technology
Resistance to most acids, organic solvents and diluted alkaline solutions
Product Characteristics
PET Track-Etched Membranes
PET Track-Etched Membranes
Performance of PET membranes
with standard characteristics
with standard characteristics
Stability in different media
(PET membrane)
(PET membrane)
| Typical Flow Rates | |||||
|---|---|---|---|---|---|
| Pore Size (a) (μm) | Pore Density (b) (pores/cm2) | Nominal Thickness (c) (μm) | Min. Bubble Point (d) (bar) | Water (e) (mL/min/cm2) | Air (f) (L/min/cm2) |
0.05 (a1) | 2 x 109 | 12 | 10 | 0.3 | 0.3 |
0.1 (a1) | 1 x 109 | 12 | 5.5 | 3 | 1 |
0.1 (a1) | 1.5 x 109 | 19 | 5.5 | 3 | 1 |
0.2 (a1) | 3 x 108 | 12 | 2.9 | 8 | 2 |
0.2 (a1) | 5 x 108 | 19 | 2.9 | 8 | 2 |
0.4 (a1) | 8 x 107 | 12 | 1.5 | 25 | 5 |
0.4 (a1) | 1.5 x 108 | 19 | 1.5 | 25 | 5 |
0.6 (a1) | 4 x 107 | 11 | 1 | 50 | 11 |
1 (a2) | 1.3 x 107 | 11 | 0.6 | 160 | 25 |
1 (a2) | 2 x 107 | 18 | 0.6 | 160 | 25 |
2 (a2) | 3 x 106 | 10 | 0.3 | 800 | 100 |
2 (a2) | 5 x 106 | 17 | 0.3 | 800 | 100 |
3 (a2) | 1.4 x 106 | 9 | 0.2 | 1700 | 250 |
3 (a2) | 2 x 106 | 16 | 0.2 | 1700 | 250 |
5 (a2) | 5 x 105 | 14 | 0.1 | 2500 | 300 |
a1
a2
b
c
d
e
f
In the narrowest place of the pore (structure of pore is high aspect-ratio hourglass shaped). Tolerance on the surface ± 20%
(Pore shape is cylinder) Tolerance ± 10%
Tolerance ± 10%
Tolerance ± 10%
Measured using Ethanol
Measured with high purity deionized water at a 0.7 bar differential pressure across the sample
Measured with prefiltered air at a 0.7 bar differential pressure across the sample
More information
For more information regarding the production and quality control processes of the track-etched membranes please follow the links below:
Physicochemical Treatment Facility
R&D Laboratory