Prediction of air permeability of single jersey cotton fabrics related to pressure difference [Pamuklu süprem kumaslarda hava geçi'rgenli'ği'ni'n basinç farkina bağli olarak tahmi'nlenmesi']

Air permeability has an important role among clothing comfort characteristics and it is a complex feature that is affected by many parameters. It makes heat transfer easier besides more comfortable feeling due to high breathability. The aim of this study was the prediction of air permeability by both fabric properties and pressure drop. For this purpose, an equation was presented by linear regression method using fabric density, tightness factor and pressure difference. The results of the variance analysis showed that the air permeability could be estimated with high reliability. The study also tested air permeability values at increasing pressure differences in order to investigate the behaviour of fabric structures related to pressure difference. The results indicated that the applied pressure differences increased the air permeability values and the tendency of increment changed depending on the fabric tightness. This situation was defined by the relation between air permeability and porosity. A deformation in loose fabric structures at high air pressure differences was revealed.