Photothermal investigation of structural effects and moisture accumulationin textiles

Frequency-dependent thermal wave measurements based on infrared detection h ave been used to investigate structural effects of textiles and the effects induced by moisture accumulation in one- and two-component textile fabrics . The two-component textile presents a different material at the front and the rear surface of the fabric. For the theoretical description of the ther mal depth profiles related to the structural effects of the dry two-compone nt textile, we have used an asymmetric three-layer model which is partially transparent in the visible spectrum. A similar, but symmetrical model has been used to describe the thermal depth profile induced by the moisture dis tribution in one-component cotton fabrics.