Abstract
Sorption and diffusion properties of water for four Nylon-6 fibers of different diameters have been systematically examined at 25°C. The diameters of the fibers are 82, 24, 9.1(micro-fiber), and 2.5(super-micro-fiber) μm. The quartz spring weighing method has been employed for measuring the water sorption to the fibers. The amount of sorbed water has been separated into that absorbed to the volume of non-crystallline part of the fibers and that adsorbed to the surface of the fibers, in order to explain the absorption by the diffusion of water into the fibers. The change in the ainount of diffused water with time was described by Fick's second law of diffusion.
