Permeation in Everyday Life
- Packaging: The permeability of the package (materials, seals, closures, etc.) needs to be matched with the sensitivity of the package contents and the specified shelf life. Some packages must have nearly hermetic seals while others can (and sometimes must) be selectively permeable. Knowledge about the exact permeation rates is therefore essential.
- Tires: Air pressure in tires should decrease as slowly as possible. Therefore it is good to know which gas permeates least through the rubber wall.
- Insulating material: Water vapour permeation of insulating material is important as well as for submarine cables to protect the conductor from corrosion.
- Fuel systems: To meet legal regulations, e.g. CARB (California Air Resource Board) for Low Emission Vehicles, it is essential to use barrier materials for fuel hoses and tanks.
- Thermoplastic and Thermosetting Piping: Pipes intended to transport water under high pressure can be considered as failed when there is a detectable permeation of water through the pipe wall to the outer surface of the pipe.
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