Abstract: This paper examines how the characteristics of hot-air nonwovens, used in the surface layer of diapers, are influenced by bicomponent fibers with different linear densities or hydrophilic properties. The properties examined include thickness, tensile strength, softness, liquid penetration time, and reverse permeability. The results show that the properties of hot-air nonwovens are significantly affected by the difference in fibers. By comparing and analyzing the test data from nine different samples, this paper aims to provide manufacturers of hot-air nonwovens with a reference for improving product quality and developing new products.

Key words: bicomponent fibers; hot-air nonwovens; linear density; hydrophilic properties