NewsInformation Center
The importance of air permeability for fabric
2019/06/21
Share:
Fabric air permeability is a measure of how well it allows the passage of air through it. The ease or otherwise of passage of air is of importance for a number of fabric end uses such as industrial filters, tents, sailcloth, parachutes, raincoat materials, shirting’s, down proof fabrics and airbags.
The air permeability directly affects the flow resistance of the filter product. There are various methods to measure the permeability index internationally, but the basic method is the same, that is, the resistance of a certain flow of clean gas passing through a certain area of filter material.
The difference is: some provisions resistance value, measurement flow size; Some regulation flow value, measure resistance size; The rating or area through the filter material also varies.
As the air permeability is not linear with the pressure difference at both sides of the fabric, the air permeability curve should be measured in the air permeability – pressure difference test to obtain the air permeability performance of the fabric. But this was too much work. The practical approach is to specify the fixed pressure difference as the benchmark for permeability test.
Previous: Glow-Wire Flammability Test
N e x t : What is Fire Triangle?
