Ceno Tec GmbH from Greven, Germany, specialist in textile architecture, supplied 252 tailor-made sections for the Arena da Amazonia, using 52,000 square metres of fibreglass membranes coated with Dyneon PTFE. The real challenge: the individual membrane sections needed to be very accurately dimensioned on leaving the factory, as it was not possible to carry out any significant adjustment work at the construction site.
The membranes, manufactured and coated by Verseidag Indutex GmbH, based in Krefeld, Germany, are made from glass cloth with a tensile strength of up to 10,000 N/5 cm. Coating the membranes with the high-performance material Dyneon PTFE achieves an elongation at break of up to 600 per cent and protects the cloth against UV rays, humidity and other environmental effects.
PTFE belongs to the fluoropolymer family and needs no plasticisers or stabilisers, which can evaporate over time leading to brittleness of the coating. This means that, even after decades of use in a tropical environment, there are no cracks in which bacteria and fungi can lodge. At the same time, the surface is so smooth that it virtually cleans itself during a rainstorm.
Picture: 52.000 Fibreglass membranes coated with 3M Dyneon PTFE protect players and spectators from direct sunlight (source: © M. Bredt)