G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 15/08 (2006.01)
Patent
CA 2325856
The invention relates to a method and device for measuring gas permeability through a porous membrane-like material, particularly through paper. In the method, a sample (N) is placed tightly against the edges of an open chamber (20), to which a gas connection is created to a source of constant pressure (18, 17), the predetermined pressure difference being used to create a stable flow of gas through the sample, and to measure at least one volume quantity, which is proportional to the gas permeability of the material. The flow of gas is throttled before being led to the chamber (20), which rapidly stabilizes the flow.
L'invention concerne un procédé et un dispositif de mesure de la perméabilité au gaz d'un matériau de type membrane poreuse, en particulier du papier. Dans ce procédé, on place un échantillon (N) contre les bords d'une chambre ouverte (20), en communication gazeuse avec une source de pression constante (18, 17), la différence de pression prédéterminée ainsi obtenue étant utilisée pour créer un flux gazeux stable traversant l'échantillon, et pour mesurer au moins une grandeur volumique, proportionnelle à la perméabilité au gaz du matériau. Le flux gazeux est régulé par étranglement avant d'être amené dans la chambre (20), ce qui stabilise rapidement ce flux.
Hartikainen Juhani
Hartikainen Kari
Gowling Lafleur Henderson Llp
Hartikainen Juhani
Hartikainen Kari
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