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Moisture-absorbing and sweat-wicking textile products are a type of functional textile products that have developed relatively fast in recent years. Especially in sports, leisure, outdoor and travel apparel products, they have become a bright spot to guide the market and consumption.
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Moisture-absorbing and sweat-wicking fabrics may seem complicated, but it is not a completely high-tech problem. It can be designed from the aspects of moisture-absorbing and moisture-conducting fibers, fabric structure, etc.
In order to realize related functions simply and quickly, most of the moisture wicking fabrics on the market are thin fabrics. The fabrics include single-sided fabrics, double-sided fabrics, or multilayer fabrics.
The moisture wicking performance of fiber depends on its chemical composition and physical structure. The gaseous moisture evaporated from the skin surface is first absorbed by the fibrous material (ie moisture absorption), and then released through the surface of the material; while the liquid moisture on the skin surface is caused by the pores (capillaries, micropores, grooves) inside the fibers and the gap between the fibers. The capillary effect produced by the void makes the adsorption, diffusion and evaporation of water on the surface between the materials (ie release of moisture).
The form of fiber moisture conduction can be divided into two situations: infiltration and wicking. The former refers to the conduction of liquid water along the surface of single fibers or fiber aggregates in the form of infiltration, and the latter refers to the impact of fiber aggregates or single fiber holes on the liquid. The capillary wicking effect.
Among them, infiltration is the basis and premise of wicking. Fiber infiltration can be characterized by measuring contact angle, wetting force, spreading speed and other indicators, and fiber wicking can be characterized by two indicators: wicking height and wicking speed.
The results of the two effects lead to the migration of water. The former effect is mainly related to the chemical composition of the fiber macromolecules, and the latter effect is related to the physical structure of the fiber.
Moisture-absorbing and sweat-wicking fibers generally have a high specific surface area, with numerous excitatory holes or grooves on the surface, and their cross-sections are generally special and shaped. The capillary effect allows the fibers to quickly absorb moisture and sweat on the skin surface. Through diffusion, Pass to the outer belt hair.
Development of moisture-conducting and moisture-conducting fibers
In order to improve the discomfort caused by the characteristics of cotton fiber that it is easy to absorb moisture but not easy to dry, people began to consider whether it is possible to speed up the conduction and evaporation of moisture by changing the structure of yarn or fabric, or even through finishing. To achieve the effect of moisture absorption and quick-drying, the polyester cover cotton product that was all the rage at the time is a typical example.
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