Air Permeability Test For Fabric

It is used to test the resistance of the flow of air through fabrics.

Air permeability test for fabric.

Air permeability r x 167 a where qv is the flow rate of air in dm 3 per min or liters per min a is the fabric area in cm 2 shirley air permeability tester is widely used for fabric air permeability testing. Air permeability is defined as the volume of air in millilitres which is passed in one second through 10os mm2 of the fabric at a pressure difference of 10mm head of water. Air permeability tester of textile fabrics complies with astm d737 iso 9237 7231 bs 5636 etc. In filtration for example efficiency is directly related to air permeability.

Air permeability tester price is competitive. 5 2 air permeability is an important factor in the performance of such textile materials as gas filters fabrics for air bags clothing mosquito netting parachutes sails tentage and vacuum cleaners. Standard test method for air permeability of textile. Fabric air permeability is a nature of air passing through fabric normally under the situation that two sides of fabric exist pressure difference that is to say it is speed that airflow vertically goes through fabric in a prescribed test area pressure drop and time whose unit is mm s or m s.

The air permeability of a fabric also has some bearing on its water vapour permeability but the two are by no means identical. Air permeability tester is the common used to measure it. En iso 9237. Air permeability can be measured using the following test methods.

In the british standard test the airflow through a given area of fabric is measured at a constant pressure drop across the fabric of 10mm head of water. Air permeability also can be used to provide an indication of the breathability of weather resistant and.