The transmission of water is essential as clothing comfort is concerned. The human body produces heat in the form of perspiration during its activity and uses evaporation to dissipate heat and cool the body. However, if water vapor cannot escape to the atmosphere, then the relative humidity (RH) inside clothing increases, causing discomfort. Hence, knowledge of water vapor transmission is necessary. In this paper, we have tried to simulate the information about water vapor permeability and factors influencing it.
Water Vapor Transmission
Water vapor transmission is essential in determining breathability, which is the ability of clothing to allow water vapor to penetrate.
Water vapor permeability is defined as the fabric's ability to transport water vapor from the skin's surface through the fabric to the external environment. [1]
Water vapor can be transferred by
Diffusion of water vapors through layers
Absorption, transmission, and desorption of water vapor by fibers
Adsorption and migration of water vapor along the fiber surface
Transmission of water vapor by forced convection
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