What is a good air permeability value for fabric?
What is a good air permeability value for fabric?
Air permeability
| Nonwoven type | Air permeability at 200 Pa (L m−2 s−1) |
|---|---|
| Standard wetlaid | 200–700 |
| Wetlaid+fine fibers | 40–120 |
| Spunbond | 80–500 |
| Meltblown | 80–200 |
What are the popular units used to express air permeability?
It is generally expressed in SI units as cm3/s/cm2 and in inch-pound units as ft3/min/ft2. Air permeability is an important factor in the performance of such textile materials as gas filter, fabrics for air bags, clothing, mosquito netting, parachutes, sails, tentage, and vaccum cleaners.
How do you test air permeability?
Air permeability is determined by measuring the rate of airflow through a known area of material. This is achieved by applying a known pressure differential across a set area of material. Both these factors can be selected for the particular type of material being tested.
Why do we measure air permeability?
Air permeability measures how easily air is passed through fabric. It indicates the breathability of weather-resistant and waterproof fabrics and is an important factor in the performance of materials like industrial curtains, sails, airbags and parachutes.
What is the air permeability test for fabric?
Air Permeability Tester of textile fabrics complies with ASTM D737, ISO 9237/7231, BS 5636, etc. It is used to test the resistance of the flow of air through fabrics.
What is the textest air permeability tester used for?
The TEXTEST Air Permeability Tester is used for fast, simple, and accurate determination of the air permeability of all kinds of flat materials and of foam cubes. The measuring range covers dense papers and airbag fabrics as well as extremely open non-wovens and forming fabrics.
How does Asian air permeability tester work?
The “ASIAN Air Permeability Tester-high pressure for textiles consists of an arrangement for holding the test specimens between two flat faces so as to expose a known area to the flow of air through it, a vacuum system to draw air through the exposed area of the test specimens. There is an arrangement to measure the volume of read more…
Which is the best dynamic air permeability tester?
The FX 3350 Dynamic Air Permeability Tester AIRBAG-TESTER is a new and unique instrument for fast and accurate determination of the average dynamic air permeability of airbag fabrics and of the exponent of the air permeability curve in a selectable test pressure range.