It’s not all recycled urine! Some drinking water used to be transported up to the International Space Station in tanks – and the tanks were lined with Holscot FEP bladders!
Working with MT Aerospace in Germany, Holscot developed a lining system for their steel tanks which incorporated a collapsible diaphragm to push the drinking water out of the tank. Using FEP ensured that the drinking water was pure and uncontaminated.
Once the contents were depleted, the tanks were progressively filled with waste and the tank was jettisoned on re-entry.
The development work necessitated a vacuum forming in FEP believed to be the biggest ever completed and the results of the work carried out during this project can now be enjoyed on other projects where FEP is being used as an alternative diaphragm for space propellant tanks.