PTFE-Coated Glass Fabric

The technical membrane consists of a glass-fiber base fabric and a coating of PTFE (polytetrafluoroethylene), also known as Teflon. The PTFE coating is highly UV- and color-stable and can ensure a permanently white membrane. The translucent glass fabric allows a light transmittance of about 25%. An important role is played by the self-cleaning properties, which ensure that PTFE-glass fabric membrane constructions dirty very little or that dirt is washed away with every rain, thereby producing a permanently radiant white membrane. Low-Wick coatings prevent water ingress and thus contribute to the long life of these fabrics. With an average service life of 30–40 years, the material is among the most durable on the market for technical fabrics. PTFE-coated glass fabrics are classified as B1 (hard to ignite) according to DIN 4102-1, although some fabrics are also available in A2 (non-combustible). In the event of fire, the material emits very little smoke and does not produce dripping flaming particles, corresponding to Euroclass B-s1-d0.

Applications of PTFE Glass Fabric in Textile Architecture

PTFE fabrics have the peculiarity of initially arriving in a light brown-beige color after manufacturing and only acquire their bright white color after several weeks of UV exposure. The color palette of PTFE-coated fabric is limited to a few colors. A special welding band must be used during processing for the welding operation.

The applications of PTFE architectural fabrics are diverse. They can be used primarily in permanent membrane construction both indoors and outdoors. For temporary constructions, their use is not suitable, as the carrier material (glass fiber) is relatively brittle. The PTFE-coated surface gives the material a very high-quality and elegant appearance, creating a special atmosphere.

As a general contractor for Textile Architecture, 3dtex regularly uses PTFE-coated glass fabric in construction projects and has gained extensive experience in planning, fabrication, and installation. In 2015, the large membrane sculpture at Eckernförde’s harbor tip was installed. This project demonstrates that, with proper planning, the material shows no signs of aging even after almost ten years. The same applies to the sail installed in 2013 for the vocational school in Aarau.