The air permeability test for measuring the air permeability of materials, including non-woven fabrics, typically applies a differential pressure across the fabric sample. The precise value of the pressure used may vary depending on the specific test method and standard being followed. However, in many cases, the standard test pressure for air permeability is commonly set at 200 Pa (Pascal), which is equivalent to 2.02 cm water gauge or 0.03 psi (pound-force per square inch).
It's important to note that different industries or applications may have their own specific test pressures, and these can differ from the general standard. Therefore, it is recommended to refer to the relevant testing standards or specifications related to the specific material or application to ensure accurate and standardized testing procedures.
Please keep in mind that the test pressure value provided here is based on general information, and actual testing requirements may vary.
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