Rollstock Membrane

Track-Etched Membrane Perfect for High Volumes & Easy Process Integration

Ideally suited for in-house and large-scale manufacturing integration, Oxyphen’s track-etched rollstock membrane – which can be laminated, unlaminated, or fiber-based – is supplied from high-quality polyester (PET) or polycarbonate (PC) raw materials. Depending on the application’s requirements, the membranes can be treated with hydrophilic, hydrophobic, or oleophobic properties and converted from 310mm width bobbin down to 8mm slit rolls. 

Oxyphen offers two types of track-etched membranes – unlaminated Unique-Mem and laminated RoTrac membranes. Both are available in rollstock format. Unlaminated Unique-Mem® track-etched membranes are characterized by cylindrical shaped pores penetrating the membrane in different angles. They consist of a single unsupported membrane layer which can be transparent or translucent depending on pore density. Laminated RoTrac® membranes are Unique-Mem® membrane technologies, available as either hydrophobic or hydrophilic, that are supported with non-woven material (PP or PET) to create a more robust membrane.

The porous structure of Oxyphen track-etched membranes can be adjusted in pore size and pore density depending on the desired filtration efficiency, flow rate or water entry pressure needed for a particular application. The membranes can be sealed via heat or ultrasonic welding onto most plastic housings, preferably in a punch-and-seal procedure. 

rollstock membrane
Rollstock membranes are available for laminated, unlaminated and fiber-based membranes that can be integrated into your in-house large-scale manufacturing processes.
  • 100% Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP
  • Cost-effective
  • Best suited for automated assembly
  • Easy handling with maximum output
  • Different raw material options
  • Available with and without laminations
  • Adjustable pore size, pore density and thickness
  • Resistant to gamma-ray and X-ray sterilization
  • Hydrophilic, hydrophobic and oleophobic coating available
  • Self-cleaning and reversible function through minimal pressure difference
  • PET (hydrophilic and hydrophobic)
  • Polycarbonate (PC)
  • Alternative membrane materials available on demand
Specification Unique-Mem® Track-Etched Membranes RoTrac® Track-Etched Membranes
Bandwidth (mm)
10, 13, 14.5, 20 & custom sizes
High Quality Raw Materials
PET – naturally slightly hydrophilic
PC – naturally slightly hydrophobic
PET-Membrane/ PET-Nonwoven –harder
PET-Membrane/ PP-Nonwoven – softer
Pore Size Ranges
0.1µm to 10µm
0.2µm to 3.0µm
Pore Density Ranges
105 to 109 pores per cm2
2×106 bis 3×108 pores per cm2
Thickness Ranges
8µm to 50µm
90µm to 220µm
Temperature Ranges
– 40°C and 160°C (for special application < 200°C)
– 40°C and 130°C (for special application < 160°C)
Air Flow Ranges
Up to 800 l / (bar cm2 min)
Up to 37 l / (bar cm2 min)
Hydrophilic Treatments
Various hydrophilic treatments increase water flow rate and wetting abilities of the membrane (example: PVP treatment)
Hydrophobic / Oleophobic Treatment:
Grade up to 7.5; AATCC TM 118
Salt spray resistance test2
According to IEC 60068-2-52, based on validation by the customer
Temperature resistance test1
In accordance with ISO 16750-4
Ice water shock test1&2
In accordance with ISO 16750-4
Climate resistance test
In accordance with ISO 16750-4
Chemical resistance test1
According LV124/ ISO 16750-5
IP Protection1
IP 64/65/66/67/68, according to DIN 40050

1 Testing in Progress

2 Based on Customer Validation

Highlighted Case Study

Electronic Textiles

Oxmotex AG is a research and development company dedicated to electroosmotic vapor and fluid transport, who developed revolutionary proprietary technology for electronically controlled moisture transport in membranes and textiles. As they looked to create a new innovative technology that would provide active electronically driven moisture transport, they came to Oxyphen for a track-etched membrane solution that would be responsive to changing climates, transport moisture beyond normal sweat rates, and be comfortable for the wearer.

Related Resources

Rollstock Membrane Product Brochure

Learn more about Oxyphen rollstock track-etched membrane material for in-house and large-scale manufacturing integration, which can be produced laminated or unlaminated, converted into different lengths, and surface treated upon request.

RADAR Sensors Application Brochure

Learn more about Oxyphen’s track-etched membranes that serve as a multi-purpose venting solution – providing the adequate pressure compensation, durability, protection, and accuracy needed for reliable sensor accuracy and performance.

Viral Filtration Efficiency (VFE) Certificate

Final test report from Nelson Labs for Viral Filtration Efficiency (VFE) at an Increased Challenge Level. Also available is the Bacterial Filtration Efficiency (BFE) report.

Register for our On-Demand Webinar

Delivering Precision & Control: An Introduction to Track-Etched Membrane Technology

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Membrane Technologies Available

Unique-Mem track-etched membranes


Unique-Mem® Unlaminated Track-Etched Membranes

Unique-Mem® track-etched membranes, available as hydrophilic or hydrophobic, are characterized by cylindrical shaped pores penetrating the membrane in different angles. They have a smooth flat surface and well-defined flow rates.

RoTrack Track-etched Membrane


RoTrac® Laminated Track-Etched Membranes

RoTrac® track-etched membranes are Unique-Mem® membranes that are supported with non-wovens (PP or PET) to create a more robust membrane. They are available as either hydrophilic or hydrophobic membranes.

Fiber-Based track-etched membranes


Fiber-Based Membranes

Fiber-based membranes are surface modified using a super-hydrophobic coating to repel water and other liquids while still allowing maximum airflow.

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