Influence of Relative Humidity and Storage Configuration of Knitted Fabrics in a Production Line on the Phenomenon of Sorption

Many works have reflected the coupled phenomena of heat and mass transfer in fabrics using the laws of water transport and the phenomenon of vapor sorption. Some have studied the modeling of the kinetics of this phenomenon to determine the diffusion of vapor in the textile. Others have modeled adsorption and desorption isotherms to study the evolution of sorption hysteresis as a function of temperature, textile structure or material history. The phenomenon of adsorption in an environment characterized by high relative humidity, the water content of the material increases, it is called free recovery. The phenomenon of desorption: in an environment characterized by low relative humidity, the water content of the material will decrease. The amount of water contained in a textile material is highly dependent on the temperature and relative humidity of the surrounding air, the material and its components. The process that aims to partially or totally remove water from a wet body by evaporating this water is called drying. The wet object in question can be solid or liquid, but the final product is solid (special case of the dehydration of non-volatile liquids: except for oil drying), which distinguishes drying and liquid concentration. Here, the end product is a concentrate. Drying at high relative humidity creates a “capillary” flow from the inside to the outside of the textile material. Since the continuity of the “capillary” liquid phase is not broken, the movement of water is dominated by capillary pressure.