Oleophobic ePTFE membrane for industrial venting
Huzhou Kaili New Material Technology Co., Ltd. manufactures specialized Oleophobic ePTFE (expanded Polytetrafluoroethylene) membranes designed for critical industrial venting applications. In environments where equipment is exposed to oils, detergents, or automotive fluids, standard membranes can "wet out" and lose breathability. Our oleophobic treatment ensures that the membrane repels low-surface-tension liquids, maintaining continuous airflow and pressure equalization.
As a specialized facility within the Kaili Advanced Materials Group, we provide custom coating and finishing to ensure our venting solutions meet the highest IP (Ingress Protection) ratings.
| Performance Property | Test Method | Value / Specification |
| Oil Repellency Rating | AATCC 118 | Grade 6 – 8 |
| Water Entry Pressure (WEP) | ISO 811 | >50 kPa – 200 kPa (Customizable) |
| Airflow Rate | ISO 9237 | 100 – 5000 ml/min/cm² @ 7kPa |
| Operating Temperature | Thermal Analysis | -40°C to +260°C |
| Thickness | Micrometer | 10μm – 150μm |
| Color | Visual | Natural White / High-Contrast Black |
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Why Oleophobic ePTFE is Essential for Venting
- Resistance to "Wetting Out": Standard ePTFE is hydrophobic (repels water) but can be penetrated by oils. Our oleophobic grade achieves an Oil Rating of 6–8, ensuring that lubricants, fuels, and cleaning agents bead up and roll off the surface.
- Rapid Pressure Equalization: Protects sensitive enclosures from vacuum or overpressure caused by temperature fluctuations, preventing seal failure and "breathing in" of contaminants.
- Superior Ingress Protection: Provides a reliable barrier against dust, salts, and water (IP67/IP68) while allowing moisture vapor to escape, preventing internal condensation.
- Thermal & Chemical Resilience: Remains functional in extreme temperatures (-190°C to +260°C) and resists corrosive industrial chemicals, ensuring a long service life in harsh environments.
- High Airflow Efficiency: Our microporous structure is engineered to provide high air permeability even at low differential pressures.
Targeted Venting Applications
- Automotive Components: Vents for headlights, sensors, ECU enclosures, and battery packs exposed to road salts and engine oils.
- Outdoor Electronics: Protective venting for telecommunications base stations, surveillance cameras, and solar inverters.
- Chemical Packaging: Pressure relief for containers holding volatile or "off-gassing" chemicals and fertilizers.
- Portable Devices: Water-resistant and oil-repellent acoustic vents for smartphones and two-way radios.
- Industrial Gearboxes: Breathable plugs that prevent oil leakage while allowing heat-induced air expansion.
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