Performance Principle of Moisture-wicking Functional Fabric

There are three main ways for water vapor to pass through the fabric: one is that water vapor diffuses through the micropores in the fabric; the second is that the fiber absorbs moisture and escapes at a point where the fabric's water vapor pressure is lower; the third is that a large number of water molecules will cause condensation And through capillary action diffusion, more evaporation occurs at low water vapor pressure.

Moisture absorption, transmission, and escape of water vapor through fibers are related to the fibers used in the fabric, the amount of moisture absorption, the degree of swelling, and the pores and channels in the fibers.

Hygroscopic and sweat-wicking functional fabrics require non-absorbent fabrics to have both water absorption and quick-drying properties. Polyester fiber has a highly crystalline molecular chain structure. This structure makes polyester have the disadvantages of low water absorption and poor moisture permeability in terms of hygroscopicity, but this just makes it have a very good fast-drying ability. Natural fibers, such as cotton, have a large number of voids in the fiber structure that make them excellent in moisture absorption performance, but the swelling effect after water absorption strengthens the grip on moisture, which causes defects in fast-drying performance.

Generally speaking, the moisture-absorbing and sweat-wicking functional fabric uses the capillary phenomenon generated by the fine grooves on the fiber surface to make sweat migrate to the surface of the fabric and volatilize by wicking, diffusion, and transmission, so as to achieve moisture-conducting and quick-drying. purpose. It can be said that the capillary effect is the most commonly used and most intuitive method, which can express the ability of the fabric to absorb sweat and diffuse. Some people also refer to hygroscopic fibers as breathable fibers, which are functional fibers that focus on moisture absorption, perspiration, and underwear comfort.