Solving Complex Design Challenges with Track-Etched Membranes 

Precision by Design. Performance by Application. 

Engineered porous materials play a critical role in controlling how air, liquids, particles, and biological materials move through products and systems. When performance depends on precise filtration, controlled airflow, pressure equalization, or selective transport, small variations in membrane structure can have a significant impact on product reliability and functionality. 

This webinar explored how Porex’s Oxyphen® Track-Etched Membrane (TEM) technology helps customers solve complex design challenges by combining precisely engineered pore structures with application-focused engineering and scalable manufacturing capabilities. From automotive venting and electronics protection to life science research and diagnostic sample preparation, track-etched membranes enable highly controlled and repeatable performance across a broad range of applications.

What Makes Track-Etched Membrane Different? 

Track-etched membranes are thin polymer films engineered with highly uniform, precisely controlled pores. Unlike conventional membrane technologies, pore size and pore density can be adjusted independently, enabling designers to tailor filtration, airflow, venting, and transport performance to specific application requirements. The result is a membrane that delivers consistent, repeatable performance from lot to lot.

Key advantages include: 

• Precisely defined pore size and pore density 

• Consistent airflow and filtration performance 

• Predictable pressure equalization and barrier properties 

• Surface filtration with high particle retention efficiency 

• Hydrophilic, hydrophobic, and oleophobic surface options 

• Flexible integration into components, assemblies, and finished products   

Designed for Integration 

Track-etched membrane technology is available in a variety of formats to fit both performance requirements and manufacturing needs, including: 

• Rollstock and die-cut media 

• Self-adhesive membrane pads 

• Weldable and sealable membrane formats 

• Molded and assembled components with integrated membrane functionality 

These options allow customers to select the level of integration that best supports their product design, manufacturing strategy, and commercialization goals. 

Solving Real-World Design Challenges Across a Wide Range of Applications 

Automotive & EV Battery Venting 

Modern vehicle electronics, lighting systems, sensors, and battery packs require protection from water, dust, dirt, and environmental contaminants while maintaining pressure equalization. Track-etched membranes provide tightly controlled airflow and water-entry pressure performance, enabling reliable venting and protection under demanding operating conditions. In EV battery applications, precisely engineered membrane structures can also support rapid pressure relief during critical battery events. 

Consumer Products & Electronics 

Sealed consumer devices and electronics require airflow management without compromising protection against water, oils, chemicals, and environmental contaminants. Track-etched membranes help manufacturers balance ventilation, barrier performance, chemical compatibility, and product reliability while supporting compact designs and high-volume manufacturing.  

Cell Culture & Life Science Research 

Track-etched membranes provide the precise pore structures required to support advanced cell culture systems, tissue models, and laboratory workflows. Consistent pore size and density enable controlled nutrient transport, cell separation, and fluid movement while supporting reproducible research outcomes and compatibility with sterilization processes.  

Diagnostic Sample Preparation 

In diagnostic workflows, reliable filtration and separation performance can directly impact downstream analysis. The smooth membrane surface, precise pore geometry, and low-interference material options available with track-etched membranes help support consistent sample preparation, analyte capture, and biological compatibility.  

From Concept to Production 

Successful implementation of any membrane technology requires more than selecting a material. Porex partners with customers to define performance requirements, evaluate design considerations, develop prototypes, validate performance, and transition solutions into commercial production. By engaging early in development, customers can reduce technical risk, accelerate design decisions, and improve overall product performance.  

How Porex Partners with Customers 

Partner in Innovation 

• Collaborative development for complex and regulated applications 

• Design refinement and validation from concept through production 

Material Science Expertise 

• Broad portfolio of porous technologies 

• Application-focused engineering and decades of process expertise 

Quality Manufacturing & Scale 

• Global manufacturing footprint and technical support 

• ISO-certified facilities and cleanroom capabilities 

• Scalable production to support commercial growth  

Continue the Conversation 

Whether you’re evaluating a new venting solution for an automotive application, optimizing filtration and airflow in electronics, or developing next-generation life science and diagnostic technologies, Porex can help identify the right membrane solution for your performance requirements. 

Talk with a Porex engineer to discuss your application and explore how track-etched membranes or other porous material technologies can help solve your next design challenge.