OIN 15105 Perméateur de gaz à pression différentielle “Determination of gas-transmission rate-Film and sheeting”
OIN 15105 Perméateur de gaz à pression différentielle “Determination of gas-transmission rate-Film and sheeting”
1. Principe
A test specimen is mounted in a gas transmission cell (see Figures A.1 and B.1) so as to form a sealed barrier between two chambers. The lower-pressure chamber is evacuated, followed by evacuation of the higher pressure chamber. A gas is introduced into the evacuated higher-pressure chamber and permeates into the lower-pressure chamber. The amount of gas which permeates through the specimen is determined by the increase in pressure on the lower-pressure side or by gas chromatography.
2. Test specimens
Test specimens shall be representative of the material under investigation, free from shrivelling, folds
and pinholes, and of uniform thickness. They shall be larger than the gas transmission area of the measurement cell and be capable of being mounted airtight.
Use three specimens unless otherwise specified or agreed upon among the interested parties.Mark the side of the material facing the permeating gas.
NOTE In principle, the test should replicate the actual conditions of use, with the gas passing from the inside to the
outside of e.g. packaging material, ou vice versa.
Measure the thickness of each specimen in accordance with ISO 4593, to the nearest 1 µm, at at least five points distributed over the entire test area, and record the minimum, maximum and average values.
Differential P.ressure gas P.ermeator GA-5050-B
Instrument de perméabilité aux gaz par méthode de pression différentielle basé sur le principe de test de la méthode de pression différentielle, est un testeur professionnel de perméabilité aux gaz pour les échantillons de films, adapté au film plastique, matériau à haute barrière en film composite, feuille, feuille métallique à différentes températures de perméabilité aux gaz et mesure du coefficient de perméabilité aux gaz.
L'instrument adopte le principe du test de pression différentielle. L'échantillon prétraité est placé entre les chambres d'essai supérieure et inférieure et serré fermement.. Tout d'abord, la chambre basse pression (chambre basse) Vacuum treatment, and then vacuum the whole system; Lorsque le degré de vide spécifié est atteint, the lower chamber of the test is closed and the high voltage chamber (chambre haute) is chargedEnter a certain pressure of the test gas, and ensure that a constant pressure difference is formed on both sides of the sample (Ajustable); So the gas will act on the pressure gradient.
In use, through the high pressure side and low pressure side penetration, through the low pressure side of the monitoring treatment, so as to obtain the test sample barrier parameters.
OIN 15105 Perméateur de gaz à pression différentielle “Determination of gas-transmission rate-Film and sheeting”
Our machine GA-5050-B is designed according to this standard and is currently widely used internationally.
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