The membrane material utilized in membrane structures typically consists of two primary components: a base fabric and a coating. The base fabric is predominantly made from polyester fibers or glass fibers, while the coating is primarily composed of polyvinyl chloride (PVC) or polytetrafluoroethylene (PTFE). Among the most commonly used membranes are polyester fabric coated with PVC and glass fiber coated with PTFE (often referred to as Teflon). PVC materials are known for their affordability, ease of processing, vibrant colors, and good crease resistance. However, they also have some drawbacks such as lower tensile strength, high elasticity, susceptibility to aging, significant creep, and relatively poor self-cleaning capabilities. To enhance its durability and cleaning properties, a layer of PTFE can be applied, which can extend its lifespan to around 15 years. On the other hand, PTFE offers several advantages such as high tensile strength, excellent elasticity, natural self-cleaning properties, and superior fire resistance. Despite these benefits, PTFE is quite expensive, challenging to fold, and requires precise cutting during production. Its longevity usually exceeds 30 years, making it ideal for long-term or permanent architectural projects. While both materials serve different purposes depending on the requirements of the project, architects and engineers often weigh factors like cost, durability, maintenance needs, and aesthetic preferences when choosing between PVC and PTFE-coated membranes."
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