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Sunfilm® ePTFE Protective Vent Membrane
Reliable Pressure Equalization and Long-Term Environmental Protection.
Features
Applications
Technical Parameters
Specifications
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Working Principle
Guide
Features
Sunfilm® Skived PTFE Film
Sunfilm® Skived PTFE Film
Its pores are significantly smaller than liquid water droplets while allowing air and water vapor to pass through. This enables continuous airflow and rapid pressure equalization while helping prevent water, dust and contaminants from entering sensitive electronic enclosures.Sunfilm® ePTFE Protective Vent Membrane is manufactured from expanded polytetrafluoroethylene with a highly uniform three-dimensional microporous structure.Its pores are significantly smaller than liquid water droplets while allowing air and water vapor to pass through. This enables continuous airflow and rapid pressure equalization while helping prevent water, dust and contaminants from entering sensitive electronic enclosures.Optional oleophobic treatment provides enhanced resistance to oils, fuels and other low-surface-tension liquids, making the membrane suitable for automotive electronics, consumer electronics, medical devices, industrial equipment, outdoor systems and energy-storage applications.
Sunfilm® ePTFE Protective Vent Membrane Has One Clear Purpose:
Helping Devices Breathe While Providing Reliable Environmental Protection
High Air Permeability
Allows continuous airflow and water-vapor transmission while helping reduce internal condensation.
Rapid Pressure Equalization
Quickly balances pressure changes caused by temperature fluctuations, altitude changes and environmental conditions.
Excellent Chemical Resistance
Provides reliable resistance to fuels, chemicals and industrial contaminants in demanding operating environments.
Optional Oleophobic Protection
Optional surface treatment helps resist oils and low-surface-tension liquids for enhanced environmental protection.
Long-Term Reliability
Maintains stable waterproof and breathable performance throughout the service life of the device.
Application
Sunfilm® Unsintered PTFE Provides Reliable Insulation for Mission-Critical Wiring Systems
Consumer Electronics
Medical Devices
Automotive Electronics
Industrial Equipment
Outdoor Equipment
Energy Storage and Battery Systems
Technical Parameters
| Scope | Typical Value | Unit | Tolerance | Test Standard |
|---|---|---|---|---|
| Membrane Material | 100% Expanded PTFE | — | — | — |
| Color | Natural / White | — | — | Visual Inspection |
| Membrane Structure | Microporous | — | — | Microscopic Inspection |
| Air Permeability | To Be Confirmed | ml/min/cm² | — | Product Test Method |
| Water Entry Pressure | To Be Confirmed | kPa | — | Product Test Method |
| Waterproof Rating | To Be Confirmed | IP | — | IEC 60529 |
| Dust Protection | To Be Confirmed | IP | — | IEC 60529 |
| Oleophobic Grade | Optional | Grade | — | Product Test Method |
| Operating Temperature | To Be Confirmed | °C | — | Product Test Method |
| Chemical Resistance | Excellent | — | — | Inherent PTFE Properties |
Specifications
| Series | Type | Market | Application | |
|---|---|---|---|---|
| Sunfilm® ePTFE Protective Vent | Adhesive Vent Membrane | Global | Automotive electronics, sensors, cameras and compact electronic enclosures | Learn More |
| Sunfilm® ePTFE Protective Vent | Weldable Vent Membrane | Global | Industrial equipment, battery systems and sealed electronic housings | Learn More |
| Sunfilm® ePTFE Protective Vent | Oleophobic Vent Membrane | Global | Automotive, industrial and outdoor equipment exposed to oils and contaminants | Learn More |
Why Choose Sunfilm® ePTFE Protective Vent Membrane
| Comparison | Fully Sealed Enclosure | Sunfilm® ePTFE Protective Vent |
|---|---|---|
| ✖Internal pressure may build up | ✔Rapid and continuous equalization |
| ✖Depends entirely on enclosure seals | ✔Blocks liquid water while allowing airflow |
| ✖Moisture may accumulate internally | ✔Supports vapor exchange and reduces condensation |
| ✖Pressure cycling stresses seals | ✔Reduces pressure loads on enclosure seals |
| ✖No controlled vent protection | ✔Optional oleophobic protection |
| ✖Higher risk of seal fatigue and condensation | ✔Stable long-term environmental protection |
Related Downloads
Reliable Pressure Equalization and Long-Term Environmental Protection.
Frequently Asked Questions
- Which industries commonly use Pipe Thread Sealant?Pipe Thread Sealant is widely used in plumbing, HVAC, gas distribution, hydraulic systems, petrochemical plants, water treatment facilities, and industrial manufacturing.
- How much pressure can Pipe Thread Sealant withstand?Depending on the formulation and application, high-performance thread sealants can withstand pressures up to 69 MPa (10,000 psi).
- What materials can Pipe Thread Sealant be used on?It is suitable for most metal threaded fittings, including steel, stainless steel, brass, copper, and aluminum.
- Can Pipe Thread Sealant replace PTFE Tape?Yes. In many industrial applications, Pipe Thread Sealant can replace PTFE Tape and provide a more reliable and durable seal.
- What is the difference between Pipe Thread Sealant and PTFE Tape?PTFE Tape mainly fills thread gaps mechanically, while Pipe Thread Sealant forms a chemical seal after curing, providing higher pressure resistance, better vibration resistance, and long-term sealing performance.
Guide
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Because gas systems cannot tolerate any failures. ForeverSeal® GasSafe is designed specifically for gas pipeline applications, not a modification of generic PTFE tape. From material density and thickness to color-coded compliance and controlled manufacturing, every design parameter revolves around one goal: achieving a long-lasting, easily inspectable gas seal.
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ForeverSeal® GasSafe products are widely used in: residential gas pipeline installations, city gas distribution networks, commercial gas appliance connections, LPG and propane system components, and OEM-assembled gas equipment.
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