ISO 15105 Differential Pressure Gas Permeator “Determination of gas-transmission rate-Film and sheeting”
ISO 15105 Differential Pressure Gas Permeator “Determination of gas-transmission rate-Film and sheeting”
1. Nguyên tắc
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, hoặc vice versa.
Measure the thickness of each specimen in accordance with ISO 4593, to the nearest 1 ừm, at at least five points distributed over the entire test area, and record the minimum, maximum and average values.
Differential Pressure Gas Permeator GA-5050-B
Differential pressure method gas permeability instrument based on the test principle of differential pressure method, is a professional gas permeability tester for film samples, suitable for plastic film, composite film high barrier material, sheet, metal foil at various temperatures of gas permeability and gas permeability coefficient measurement.
The instrument adopts the principle of differential pressure test. The pre-treated sample is placed between the upper and lower test chambers and clamped tightly. đầu tiên, the low pressure chamber (lower chamber) Vacuum treatment, and then vacuum the whole system; When the specified vacuum degree is reached, the lower chamber of the test is closed and the high voltage chamber (upper chamber) is chargedEnter a certain pressure of the test gas, and ensure that a constant pressure difference is formed on both sides of the sample (có thể điều chỉnh); 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.
ISO 15105 Differential Pressure Gas Permeator “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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