RoTrac® Laminated Track-Etched Membranes

Laminated Membranes for Increased Robustness, Weldability and Stress Resistance

RoTrack Track-etched Membrane
SEM image showing the track-etched membrane with the supporting laminate layer for added strength

RoTrac® laminated track-etched membranes are based on Unique-Mem® membrane technology – which consists of a single, unsupported PET or PC membrane layer – but supplemented with an additional PP or PET non-woven supporting layer.

This non-woven layer provides increased robustness and weldability properties along with outstanding mechanical stress resistance. For challenging assembly conditions, increased mechanical rigidity is particularly beneficial for membrane handling.

The laminates are adhesive-free and created by thermal bonding for greater purification. RoTrac® laminated membranes are available in various thicknesses and custom dimensions – and can be treated with hydrophilic, hydrophobic, or oleophobic properties depending on your needs.

All Oxyphen membranes are 100% PFOA free and can be used freely in accordance with the latest REACH legislation from July 4, 2020.

  • Improved mechanical robustness and weldability 
  • Thermal bonding process – adhesive-free
  • Consistent Flow-Rates and WEP characteristics​
  • Adjustable burst-pressure rate​s
  • Hydrophilic, hydrophobic or oleophobic (extended hydrophilic coating available)​
  • IP 6X-rated protection according to DIN 40050​
  • High chemical resistance​
  • Resistant to Gamma-ray and X-ray sterilization​
  • 100% Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP​

Specification RoTrac® Track-Etched Membranes
Bandwidth (mm)
10, 13, 14.5, 20 & custom sizes
High Quality Raw Materials
PET-Membrane/ PET-Nonwoven –harder
PET-Membrane/ PP-Nonwoven – softer
Pore Size Ranges
0.2µm to 3.0µm
Pore Density Ranges
2×106 bis 3×108 pores per cm2
Thickness Ranges
90µm to 220µm
Temperature Ranges
– 40°C and 130°C (for special application < 160°C)
Air Flow Ranges
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

Automotive Headlamp Venting

Automotive Headlamp Venting

A manufacturer of automotive lighting equipment came to Oxyphen to develop and design a hydrophobic membrane venting solution that would address four key design challenges – ingress protection, adequate airflow to prevent condensation, customized temperature requirements, and easy assembly.

Related Resources

Automotive Lighting Application Brochure

Learn more about Oxyphen’s ultra-hydrophobic fiber-based membrane vents that provide a high airflow while also preventing liquid, fine dust and particles, and humidity from entering the lighting system.

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.

EV Battery Safety Vents Application Brochure

Learn more about Oxyphen’s hydrophobic all-in-one solution that protects critical internal components from the ingress of liquid, dust, dirt, and other contaminants while also having the ability to burst at predefined overpressures to prevent potential explosions from taking place in the event of thermal runaway.

Register for our On-Demand Webinar

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

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Assemblies & Modules

Assemblies & Modules

To meet specific product solution requirements within the life-science and automotive spaces, Oxyphen partner with leading OEMs to develop highly tailored components and assemblies for specific applications. 

customized solutions

Customized Solutions

Oxyphen consists of a team of scientists, problem solvers, engineers, and strategic thinkers who are passionate about creating high-value solutions that bring customer’s product designs or concepts to life.

Other Membrane Technologies

Unique-Mem track-etched membranes


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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.

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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