Track-etched membranes feature a unique pore structure that offers the smallest tolerances regarding pore sizes and pore density on the market. The unique two-step process allows Oxyphen to target specific customer requirements regarding pore size and density that affect air flow and water entry pressure. Due to their smooth surface, track-etched membranes are a perfect surface filter with reversible (backflush) and self-cleaning functionality for hydrophobic, oleophobic, and hydrophilic applications.
The technology to produce our track-etched membranes follows two key steps:
- Ion bombardment of polymer films with heavy ions to create distinct tracks
- Subsequent chemical etching of polymer films
The two-step process enables complete control of both pore size and pore density independently from one another to ensure precise pore diameter and controlled pore density to meet customer-specific requirements.
100% PFOA Free:
All Oxyphen membranes are PFOA free and can be used freely in accordance with the latest REACH legislation from 04. July 2020.
Unique-Mem® track-etched membrane
RoTrac® track-etched membrane
Unique-Mem® track-etched membranes
Unique-Mem® track-etched membranes are characterized by cylindrical shaped pores penetrating the membrane in different angles, as well as a smooth flat surface and well-determined flow rates. They are available either as hydrophilic or hydrophobic membranes.
All Oxyphen membranes are PFOA free and can be used freely in accordance with the latest REACH legislation from 04. July 2020.
Key benefits
Unique-Mem® track-etched membranes consist of a single, unsupported membrane layer. They can be transparent or translucent depending on pore density.
- Hydrophilic features used for filtration applications:
- 100% Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP
- Biological inert
- Low protein binding
- High chemical resistance
- Resistant to gamma-ray and X-ray sterilization
- Extended hydrophilic coating available
- Hydrophobic features used for venting applications:
- 100% Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP
- Hydrophobic coating
- High chemical resistance
- Resistant to gamma-ray and X-ray sterilization
- Self-cleaning and reversible function through minimal pressure difference
Related products
- Rollstock membrane
- OxyDisc membrane discs
- OxyPad self-adhesive membrane pads
- OxySeal pressure compensation units
- Assemblies & modules
Related applications
Technical specifications
| Unique-Mem | Ro-Trac | |
|---|---|---|
| Air Flow | Up to 800 l / (bar cm2 min) | Up to 37 l / (bar cm2 min) |
| Pore Size | 0.1µm to 10µm | 0.2µm to 3.0µm |
| Pore Density | 105 to 109 pores per cm2 | 2M to 320M pores per cm2 |
| Thickness | 8µm to 50µm | 90µm to 220µm |
| Temperature Range | – 40°C and 160°C (for special application < 200°C) | – 40°C and 130°C (for special application < 160°C) |
| Hydrophilic Treatments | Various hydrophilic treatments increase water flow rate and wetting abilities of the membrane (example: PVP treatment) | Various hydrophilic treatments increase water flow rate and wetting abilities of the membrane (example: PVP treatment) |
| Hydrophobic / OleophobicVersion | • WEP: Up to 3 bar • Chemical Resistance: LV124/ ISO16750-5 (testing in progress, due end of August) | • WEP: Up to 3 bar • Chemical Resistance: LV124/ ISO16750-5 (testing in progress, due end of August) |
| Materials Used | • PET – naturally slightly hydrophilic • PC – naturally slightly hydrophobic | • PET-Membrane/ PET-Nonwoven – this is harder • PET-Membrane/ PP-Nonwoven – this is softer |
RoTrac® track-etched membranes
RoTrac® track-etched membranes are Unique-Mem® membranes that are supported with nonwovens (PP or PET) to create a more robust membrane. They are also available as either hydrophilic and hydrophobic membranes.
100% PFOA Free:
All Oxyphen membranes are PFOA free and can be used freely in accordance with the latest REACH legislation from 04. July 2020.
Key benefits
- 100% PFOA-free hydrophobic coating
- Distinct air flow rates with low variability enables customers to decrease scrap rate at end of production through leakage test with exact parameter setting hence making them more productive
- Excellent welding characteristics for high automized and cost-effective processing
- For application-temperature range between – 40°C and 140°C
- Self-cleaning and reversible function through minimal pressure difference to recover functionality during the application. This is due to the extremely smooth surface of the membrane.
Technical specifications
| Unique-Mem | Ro-Trac | |
|---|---|---|
| Air Flow | Up to 800 l / (bar cm2 min) | Up to 37 l / (bar cm2 min) |
| Pore Size | 0.1µm to 10µm | 0.2µm to 3.0µm |
| Pore Density | 105 to 109 pores per cm2 | 2M to 320M pores per cm2 |
| Thickness | 8µm to 50µm | 90µm to 220µm |
| Temperature Range | – 40°C and 160°C (for special application < 200°C) | – 40°C and 130°C (for special application < 160°C) |
| Hydrophilic Treatments | Various hydrophilic treatments increase water flow rate and wetting abilities of the membrane (example: PVP treatment) | Various hydrophilic treatments increase water flow rate and wetting abilities of the membrane (example: PVP treatment) |
| Hydrophobic / OleophobicVersion | • WEP: Up to 3 bar • Chemical Resistance: LV124/ ISO16750-5 (testing in progress, due end of August) | • WEP: Up to 3 bar • Chemical Resistance: LV124/ ISO16750-5 (testing in progress, due end of August) |
| Materials Used | • PET – naturally slightly hydrophilic • PC – naturally slightly hydrophobic | • PET-Membrane/ PET-Nonwoven – this is harder • PET-Membrane/ PP-Nonwoven – this is softer |