The Air permeability tester is a specialist instrument for testing the permeability of materials with high gas permeability, known as air permeability testing. The Air permeability tester is ideal for materials with high gas permeability such as foam, leather, textiles, paper, cardboard and porous ceramics. Air permeability testing is an important tool for monitoring the permeability of these materials in specific areas where it is necessary to quantify the permeability of gases. For example, the air permeability of cigarette paper has a direct impact on the appearance of the cigarette, the smell and the smoke content of the cigarette, while the control of the air permeability of textiles is a key factor in the comfort of clothing.
For testing the specific gas permeability of materials with certain gas barrier properties, a breathability tester is required to complete the test. Breathability testers are mainly used to test materials with high barrier properties, mostly polymers or multi-layer composites made of polymers, such as plastic films, composite films, aluminised films, aluminium-plastic composite films or paper-plastic composite films.
Fabric permeability: For the determination of fabric permeability, China mainly conducts tests according to the standard quot;IOS 5453 Textiles Determination of fabric permeabilityquot;, which is applicable to a wide range of textile fabrics, including industrial fabrics, non-woven fabrics and other breathable textile products. Air permeability of fabrics, the performance of air passing through a fabric. Identified by the rate of airflow through a specimen vertically over a specified test area, pressure drop and time. The specific test principle is as described in the standard: the air flow rate through a given area of the specimen is measured vertically over a given period of time under specified differential pressure conditions and the air permeability is calculated. The airflow rate can be measured directly or converted by measuring the differential pressure on both sides of the flow aperture.
Paper air permeability: Paper air permeability can generally be tested using the Air permeability tester of the Gehrig method testing principle. Permeability is the average air flow through the unit area of paper and cardboard under the specified conditions, in unit time and unit pressure difference, expressed in microns / (Pascal - seconds).