How Can Fabrics Achieve Moisture-Wicking and Sweat-Wicking Functions?

Moisture-wicking and sweat-wicking textile products have become a rapidly growing category of functional textiles in recent years, particularly in sportswear, casual wear, outdoor gear, and travel clothing, where they have emerged as a highlight in guiding market trends and consumer preferences. While moisture-wicking fabrics may seem complex, they are not entirely high-tech or difficult to understand. Their design can be approached from perspectives such as moisture-absorbing and moisture-conducting fibers, as well as fabric structures. To quickly and easily achieve these functions, most moisture-wicking fabrics on the market today are lightweight, including single-layer fabrics, double-layer fabrics, or multi-layer structured fabrics.

Fibers

The moisture-wicking performance of fibers depends on their chemical composition and physical structure. Gaseous moisture evaporating from the skin surface is first absorbed by the fiber material (i.e., moisture absorption) and then released via the material's surface (i.e., moisture desorption). Liquid moisture on the skin surface is transported through pores within the fibers (capillary pores, micropores, grooves) and the gaps between fibers, leveraging capillary action to facilitate adsorption, diffusion, and evaporation of moisture on the material's surface (i.e., moisture desorption).

Development of Moisture-Absorbing and Moisture-Conducting Fibers

To address the discomfort caused by cotton fibers' tendency to absorb moisture but dry slowly, researchers began exploring whether moisture transfer and evaporation could be accelerated by altering yarn or fabric structures, or even through post-finishing treatments. A classic example from the past is the once-popular polyester-covered cotton products. Later, with advancements in fiber technology, moisture-wicking and quick-drying products based on differentiated synthetic fibers as the primary material entered the market.

Chemical moisture-wicking fibers primarily utilize cross-sectional irregularities (such as Y-shaped, cross-shaped, W-shaped, or bone-shaped profiles) to create grooves on the fiber surface. These grooves form a capillary wicking structure that rapidly absorbs moisture and sweat from the skin's surface and expels it outward. The moisture is then diffused and quickly evaporated by the fibers on the fabric's surface, achieving the goal of moisture-wicking and temperature regulation while keeping the skin dry and cool.

Weaving

During the weaving process, the use of jacquard techniques to strategically arrange fabric thickness, patterns, and elastic zones can provide breathability, support, and elasticity while endowing the fabric with inherent moisture-wicking properties.

Fabric Structure

Structural methods can be employed to develop one-way moisture-wicking double-layer knitted fabrics. These fabrics may use single-layer plated jacquard stitches, rib variations, or double rib variations. The inner layer can be made of hydrophobic fibers like fine-denier polyester or polypropylene, woven into honeycomb or mesh-like point structures, while the outer layer can use hydrophilic fibers like cotton, wool, or viscose to form high-density structures. This enhances the differential capillary effect between the inner and outer layers, achieving one-way moisture-wicking functionality.

One-Way Moisture Wicking

Additionally, multi-layer structured fabrics can be developed for moisture-wicking purposes. Typically, the inner layer consists of ultra-fine filaments like polypropylene or polyester, the middle layer is a moisture-absorbing layer made of cotton yarn, and the outer layer is composed of high-strength, highly permeable fibers. Such fabrics can be knitted using double rib composite structures, achieving sweat-wicking, breathability, and a soft hand feel in knitted fabrics.