Kunshan Xinzhenpin New Thin Film Material Technology Co LTD.
| Thickness | 0.10 – 0.50 mm |
| 90° Peel Strength | ≥ 15 N/25mm |
| Material Compliance | PFAS Free |
| Packaging Details | Small orders by express; bulk orders by FCL sea freight. |
| Oleophobicity Grade | ≥ 7 |
| Chemical Resistance | Corrosion-resistant，Acid-resistant |
| Moisture Vapor Transmission Rate | 8,000 – 18,000 g/m²·24h |
| Waterproof Rating | IP68 |
| Operating Temperature | -40°C to +150°C |
| Water Entry Pressure | ≥ 400 kPa |
| Payment Terms | T/T |
| Size | Customizable |
| Delivery Time | 15 working days |
| Air Permeability | Gurley：3 – 30 s/100ml @ 300 ml |
| Color | White |
| Supply Ability | Monthly Output: 300,000 sqm |
| Model Number | OEM/ODM |
| Certification | IATF16949/ISO |
| Brand Name | OEM/ODM |
| Place of Origin | China |
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Product Specification
| Thickness | 0.10 – 0.50 mm | 90° Peel Strength | ≥ 15 N/25mm |
| Material Compliance | PFAS Free | Packaging Details | Small orders by express; bulk orders by FCL sea freight. |
| Oleophobicity Grade | ≥ 7 | Chemical Resistance | Corrosion-resistant，Acid-resistant |
| Moisture Vapor Transmission Rate | 8,000 – 18,000 g/m²·24h | Waterproof Rating | IP68 |
| Operating Temperature | -40°C to +150°C | Water Entry Pressure | ≥ 400 kPa |
| Payment Terms | T/T | Size | Customizable |
| Delivery Time | 15 working days | Air Permeability | Gurley：3 – 30 s/100ml @ 300 ml |
| Color | White | Supply Ability | Monthly Output: 300,000 sqm |
| Model Number | OEM/ODM | Certification | IATF16949/ISO |
| Brand Name | OEM/ODM | Place of Origin | China |
| High Light | PFAS Free Oleophobic Membrane ，Waterproof Oleophobic Membrane ，Oil Mist Oleophobic Membrane | ||
This PFAS-free oleophobic waterproof breathable membrane is engineered for environments contaminated with oil mist, such as gearboxes, compressors, and hydraulic reservoirs. It actively repels both water and oil, preventing membrane fouling and maintaining consistent airflow. The oleophobic treatment is completely fluorine-free, using a hydrocarbon-based nanotechnology. The membrane can be custom engineered in thickness, pore size, and air permeability to match specific oil mist challenges, and is available in sheets, rolls, or die-cut parts with oil-resistant adhesive.
Oil mist generated by meshing gears or compressor pistons coats traditional vent membranes, blocking pores and stopping pressure equalization. This causes seal leaks and lubricant expulsion. While oleophobic ePTFE exists, it still contains PFAS in the base material. A PFAS-free alternative must deliver equivalent oil repellency without fluorine chemistry. Most standard polyolefin membranes are oleophilic and fail immediately in oily mist.
We have developed a PFAS-free membrane with a covalently bonded oleophobic surface treatment. The membrane achieves AATCC 118 oil repellency grade 7, meaning it resists penetration by oils with surface tensions as low as 20 mN/m. In accelerated oil mist tests, it retains over 90% of its initial airflow after 500 hours, while standard membranes clog in under 50 hours. This solution enables PFAS-free breather plugs for oil-filled assemblies, meeting both performance and regulatory needs.
Membrane: PFAS-free polymer, oleophobic
Oil repellency: Grade 7 (AATCC 118)
Water entry pressure: > 50 kPa
Air permeability: 250–500 ml/min/cm²
Temperature: -30°C to 120°C
Available formats: Rolls, sheets, die-cut pieces
Adhesive: Oil-resistant silicone PSA
Designed for gearbox breather vent patches, differential cover membranes, air compressor head space vents, hydraulic tank breathers, and chain oiler reservoir vents. It can be integrated into metal or plastic vent plugs as the core functional layer.
The oleophobic surface causes oil droplets to bead up and roll off the membrane surface without wetting it. This prevents the formation of a liquid film that would block pores. The microporous structure underneath remains open for air and vapor transfer. The treatment is molecularly bonded, meaning it does not leach out or wash off, providing long-term resistance to degradation.
Characterize the oil type and mist concentration in your application. Share this data with us for a recommendation on pore size and oleophobic grade. Consider adding a labyrinth shield on the housing side to reduce direct splash impact. For high-viscosity oils, we may suggest a slightly more open pore structure. Trial samples in an actual oil mist test rig before full specification.
Q: Is the oleophobic treatment truly PFAS-free?
A: Yes, we use a hydrocarbon-based functional silane treatment. Confirmed fluorine-free via TOF analysis.
Q: Can this membrane be cleaned if it eventually fouls?
A: Mild solvent cleaning (isopropanol) can restore performance. However, the oleophobic property minimizes the need for cleaning.
Q: Is it food-grade safe?
A: Our standard grade is not food-contact approved. We can develop a food-grade version upon request.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2018
Total Annual:
1,000,000-2,000,000
Employee Number:
30~50
Ecer Certification：
Verified Supplier
Kunshan Xinzhenpin New Thin Film Material Technology Co., Ltd. Established in 2018, Kunshan Xinzhenpin is a specialized manufacturer dedicated to ePTFE waterproof and breathable membrane solutions. We operate a fully integrated production chain covering ePTFE raw membrane manufacturing, composite a... Kunshan Xinzhenpin New Thin Film Material Technology Co., Ltd. Established in 2018, Kunshan Xinzhenpin is a specialized manufacturer dedicated to ePTFE waterproof and breathable membrane solutions. We operate a fully integrated production chain covering ePTFE raw membrane manufacturing, composite a...
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