Gas transmittance test instrument, based on the test principle of differential pressure method, is a professional for film sample gas permeability tester, suitable for plastic film, composite membrane, high barrier materials, sheet, foil, rubber, tire air tightness and osmosis membrane gas transmittance at various temperatures, the solubility coefficient, diffusion coefficient, the determination of permeability coefficient.

Gas transmission rate tester can also be called differential pressure method gas permeameter, breathability tester, breathability tester, breathability tester, etc., is the industry enterprises and institutions to test the material breathability of the necessary equipment.

Execution standard:

GB/ t1038-2000 plastics films and thin films -- gas permeability test method -- differential pressure method

ASTMD1434 - test method for determining the permeability of plastic films and laminates

ISO2556 plastics - determination of gas transmissibility of thin films and sheets under atmospheric pressure - piezometric method

Iso 15105-1 plastics - films and sheeting - determination of gas transfer rate - part 1 differential pressure method

Test method for air permeability of JISK7126 plastic films and thin plates

YBB00082003 gas transmission assay

Testing principle:

Using the principle of differential pressure test, the prepared sample is placed between the upper and lower test Chambers and clamped.Firstly, the low-pressure chamber (lower chamber) is vacuumed, and then the whole system is vacuumed.When the specified vacuum degree is reached, close the lower chamber of the test, fill the high pressure chamber (upper chamber) with a certain pressure of the test gas, and ensure that a constant pressure difference (adjustable) is formed on both sides of the sample;In this way, the gas will permeate from the high pressure side to the low pressure side under the action of the pressure gradient. Through the monitoring and treatment of the pressure inside the low pressure side, the barrier parameters of the tested samples will be obtained.

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