The service life of PTFE membrane structures

PTFE-Coated Fiberglass Membrane: 25–30 years (or even longer)

Material Advantages
PTFE (Polytetrafluoroethylene) exhibits exceptional chemical stability, UV resistance, high-temperature tolerance (withstanding -70°C to +260°C long-term), and corrosion resistance. Its extremely low surface energy (contact angle >110°) forms a superhydrophobic structure, which prevents the adhesion of dust and contaminants. Self-cleaning occurs through rainwater runoff, significantly reducing performance degradation caused by pollution.

Structural Stability
The fiberglass substrate offers high tensile strength (ranging from 3,000 to 4,000 MPa) and low creep, ensuring minimal deformation or relaxation over prolonged use. The strong bonding between the PTFE coating and fiberglass prevents delamination, maintaining the membrane’s structural integrity.

Environmental Adaptability

• UV Resistance: The C-F bonds in PTFE molecular chains absorb ultraviolet light and convert it into heat, preventing material aging.
• Pollution Resistance: The superhydrophobic surface minimizes contaminant accumulation. Even under prolonged exposure to industrial or dusty environments, performance degradation is minimal.
• Temperature Tolerance: The low thermal expansion coefficient of fiberglass, combined with PTFE’s excellent temperature resistance, makes the material suitable for extreme climate conditions.

Real-World Case
Many large-scale stadiums, such as the roof membrane structure of the Beijing Olympic "Bird's Nest," have used PTFE membranes for over 15 years while maintaining excellent performance. The expected service life exceeds 30 years.