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Permeability Testing is used to test the permeability of a package, that being, to see how much liquid or gas can make its way into the package, potentially damaging the product housed within. One method uses a central module which is separated by the test film; the testing gas is fed on the one side of the cell and the permeated gas is carried to the detector by a more

Permeability Testing is used to test the permeability of a package, that being, to see how much liquid or gas can make its way into the package, potentially damaging the product housed within. One method uses a central module which is separated by the test film; the testing gas is fed on the one side of the cell and the permeated gas is carried to the detector by a sweep gas. The diagram on the right shows a testing cell for films, normally made from metals like stainless steel. The testing medium (liquid or gas) is situated in the inner pipe and the permeate is collected in the space between the pipe and the glass wall. It is transported by a sweep gas to an analysing device.

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