Filtration performance depends on netting architecture and manufacturing precision, as well as material properties.
In advanced filtration systems, pleat support layers ensure pleat geometry, spacing uniformity, airflow distribution and mechanical stability, all of which are essential for long term filter performance. In demanding environments — where high temperatures, aggressive chemicals, or extended service intervals are the norm — standard polymer meshes often reach their functional limits.
In these applications, polyphenylene sulfide (PPS) netting is increasingly used as a high performance pleat support solution. Its value lies not only in its material properties, but in how those properties translate into stable pleat formation and reliable structural support under combined thermal, chemical, and mechanical stress.
Engineered For Extremes: Thermal Stability And Reliability
PPS is a semi-crystalline, high-temperature thermoplastic with a continuous service temperature of up to 240°C (464°F) and a melting point of ~275-290°C. In pleated filter designs, thermal exposure can lead to softening, shrinkage or deformation of conventional polymer support meshes, resulting in pleat collapse, uneven spacing or restricted airflow.
Thanks to its low thermal shrinkage and high stiffness, PPS netting preserves pleat geometry under heat and load, ensuring consistent airflow distribution and effective utilization of filter media over time.
Chemical And Hydrolytic Resistance For Harsh Environments
Pleat support nettings are often exposed to aggressive process media, condensates, cleaning agents, and humidity. PPS exhibits strong resistance to acids, bases, fuels and organic solvents, combined with very low moisture absorption and high hydrolysis stability.
In pleated filter systems, this resistance prevents swelling, embrittlement, or loss of stiffness that could otherwise lead to pleat deformation or structural failure. PPS netting helps maintain pleat spacing and mechanical support even in chemically aggressive environments, making it well suited for long-term use in industrial and aerospace filtration.
Inherent Flame Retardancy And PFAS-Free Safety
PPS netting achieves inherent flame retardancy without the use of additives, meeting UL 94 V-0 requirements and exhibiting a Limiting Oxygen Index (LOI ~33%). While flame resistance is not a primary pleat-support function, it becomes critical in safety-relevant applications such as aerospace, energy and high-temperature industrial filtration where support layers contribute to overall system integrity.
In addition, PPS netting is per- and polyfluoroalkyl substances- (PFAS)-free, enabling compliance with increasingly stringent environmental and regulatory requirements. It can also replace metal pleat supports and sleeves, offering advantages such as lower weight, corrosion resistance, and easier handling, while still maintaining the required structural rigidity.
Understanding The Limits
Like all polymer materials, PPS has defined performance limits. Strong oxidizing environments at elevated temperatures require careful evaluation. For pleat support layers, material selection alone is not sufficient — the interaction between pleat geometry, media stiffness, operating loads and environmental conditions must be considered. This is where application-specific engineering and manufacturing expertise becomes decisive in selecting the best possible material solution for each application.
Another potential downside of PPS netting may be its higher initial material cost compared to standard polymer meshes. This is primarily due to the more complex polymer chemistry, higher processing temperatures and tighter manufacturing controls. However, in demanding applications, PPS netting typically enables longer filter life, reduces pleat collapse or deformation, and minimizes filter change-outs — often resulting in lower total lifecycle costs despite the higher upfront investment.
Precision Engineering For Reliable Performance
Material properties alone don’t guarantee success — performance also depends on netting architecture and manufacturing precision, determining how effectively the netting supports pleat structure, distributes mechanical loads and maintains airflow channels.
PPS netting offers a future-ready solution for filters operating under extreme conditions. It is not only used as pleat support in aerospace filter systems, but also applied as separator in battery and semiconductor applications, or as sleeve and rigid tube in highly demanding filtration applications replacing metal components.
As a long-standing specialist in engineered netting solutions, GESSNER brings decades of experience in designing and manufacturing nettings, filter media and components for diverse filtration applications. By tightly controlling critical parameters and processing conditions, GESSNER ensures reliable performance and consistent quality, even for highly specialized and demanding filtration systems.
Editor’s Note: Please visit gessner-filtration.com for more information about PPS netting for filtration applications.
