Influence of Nonwoven Fabrics' Physical Parameters on Thermal and Water Vapor Resistance

This article takes into consideration some constructive parameters of needled nonwoven fabrics used as padding in winter clothes, and their influence on thermal resistance R _ct and water vapor resistance R _et . The nonwoven fabric features taken into consideration were the following: substance fibers, their average linear density, and their bulk density. Nonwoven fabrics examined had a fiber content varying from 0.5% to 4% of the total volume of the sample. In these particular conditions, the results obtained showed that the fiber substance has little influence on R _ct and R _et . Instead, the average fiber linear density and bulk density of nonwoven fabrics are very important for an accurate design in order to optimize comfort performance.