Material ePTFE

About Expanded Polytetrafluoroethylene (ePTFE)

Expanded Polytetrafluoroethylene (ePTFE) is a modified form of PTFE (Polytetrafluoroethylene) that has been mechanically expanded to create a highly porous, lightweight, and versatile material. Known for its exceptional chemical resistance, low friction, and high thermal stability, ePTFE is widely used in applications requiring permeability, flexibility, and durability. It is especially valued in industries such as medical, automotive, electronics, and filtration.

Properties of Expanded Polytetrafluoroethylene (ePTFE)

Thermal Properties

Operating Temperature Range : -240°C to +260°C.

High thermal resistance and stability.

Mechanical Properties

Low tensile strength compared to standard PTFE.

High flexibility and compressibility.

Excellent durability under repeated stress.

Chemical Properties

Chemically inert to almost all chemicals.

Electrical Properties

High dielectric strength.

Excellent insulation properties.

Other Properties

Highly porous structure for gas and liquid permeability.

Hydrophobic and breathable.

Specifications of Expanded Polytetrafluoroethylene (ePTFE)

Material Type

Expanded fluoropolymer.

Density

~0.2–0.5 g/cm³ (depends on expansion level).

Thickness

Customizable for specific applications, typically from 0.1 mm to 5 mm.

Porosity

~50% to 95%, depending on grade.

Availability

Sheets, films, membranes, gaskets, and tubes.

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Characteristics & Specialty of Expanded Polytetrafluoroethylene (ePTFE)

Use Cases & Industrial Sector Applications

Medical and Healthcare

- Surgical implants, such as vascular grafts and stent covers.
- Filtration membranes for sterilization and respiratory devices.
- Prosthetics and wound care applications.

Aerospace

- Sealing materials for high-performance gaskets.
- Lightweight and durable insulation for equipment.

Electronics

- Protective membranes for electronic enclosures.
- Insulation for high-frequency cables and wires.

Automotive

- Gaskets and seals in engines and fuel systems.
- Filtration membranes for fuel and air filters.

Industrial Equipment

- Chemical-resistant gaskets for pipes and fittings.
- Filtration membranes for fluid and gas handling systems.

Other Applications of ePTFE

Filtration

Membranes for water, air, and chemical filtration systems.

Energy Sector

Components for fuel cells and battery technology.

Environmental Engineering

Gas vents for pollution control and wastewater treatment.

Consumer Goods

Breathable membranes in outdoor clothing and footwear.

Food Processing

FDA-compliant grades for use in food and beverage filtration.

Materials List