Laboratori materials EPSEB-UPC

Permeabilitat al vapor d'aigua CN

Permeability to water vapour

After drying the test tubes and once the thickness and surface are measured, they are placed in the permeameters, which have water trapped in a hydrophilic material (Pv int) in the interior. The permeameters are placed in the climatic chamber in a certain environment (20ºC and 40% HR). The permeameters are weighed at intervals of 24 hours. The test ends when the difference between two successive weighings is not greater than 0.1%.