What types of membrane materials can be used in membrane architecture?

In membrane architecture, the most commonly used materials are PTFE, PVC, and ETFE. A detailed analysis of each follows:

1. PTFE Membrane Material
Characteristics:
Exceptional durability: PTFE membranes offer outstanding weather resistance, chemical corrosion resistance, and UV resistance, with a service life exceeding 25 years.
Excellent fire resistance: Classified as a Class A non-combustible material, meeting international fire safety standards.
High self-cleaning capability: The smooth surface resists dust accumulation and can be cleaned by rainwater.
Moderate light transmission: Provides soft, natural light.
Applications:
Large-scale permanent structures, such as stadiums, airport terminals, and exhibition centers.
Projects requiring long-term use and high safety standards.
2. PVC Membrane Material
Characteristics:
Lower cost: PVC membranes are more affordable compared to PTFE and ETFE.
High plasticity: Easy to process and suitable for complex structural designs.
Good light transmission: Light transmission rate is approximately 15%–20%, though self-cleaning properties and durability are relatively lower.
Applications:
Small-to-medium-sized temporary or semi-permanent structures, such as commercial pavilions, event tents, and landscape shading canopies.
Cost-sensitive projects with moderate service life requirements.
3. ETFE Membrane Material
Characteristics:
Extremely high light transmission: Light transmission can reach 95%, comparable to glass.
High impact resistance: Known as "soft glass," it is tear-resistant and age-resistant.
Good self-cleaning capability: Smooth surface that resists dust accumulation.
High design flexibility: Can be inflated to form double-layer air cushion structures, enabling complex shapes.
Applications:
Transparent inflatable membrane structures, such as stadium roofs (e.g., the "Water Cube" at the Beijing National Aquatics Center), commercial atriums, and skylights.
Projects requiring high light transmission and lightweight design.