Moisture-absorbing and sweat-wicking textile products are a kind of functional textile products that have developed relatively fast in recent years. Drotex® moisture-wicking fabric is made of a blend of moisture-absorbing and sweat-wicking fibers and cotton fibers. It has good moisture-absorbing properties, comfortable wearing, and Polyester fiber has the characteristics of quick drying and strong strength. Has good moisture absorption and shape retention performance. And can be combined with multiple functions, such as: anti-static, anti-bacterial, deodorizing, etc., often used as summer clothing for personnel working in harsh environments such as petroleum, chemical, military training, and field survival.

We introduce its principle from the following aspects
Fiber

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 dehumidification).

The form of fiber moisture conduction can be mainly 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, while the latter refers to the interaction of the fiber aggregates or single fiber holes on the liquid. The capillary wicking effect. Among them, infiltration is the basis and prerequisite 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 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 perspiration-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-absorbing and moisture-conducting fiber

The first domestic product to introduce the concept of moisture wicking or moisture absorption and quick-drying is a functional textile product developed based on the characteristics of natural fibers.

In order to improve the discomfort caused by the characteristics of cotton fiber which 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-covered cotton product that was all the rage in the past is a typical example.

Later, with the development of fiber technology, moisture-transmitting and quick-drying products based on differentiated synthetic fibers as the main raw material (domestically called moisture-absorbing and quick-drying) products have begun to enter the market.

The chemical moisture wicking fiber mainly uses the profiled cross-section of the fiber (Y-shaped, cross-shaped, W-shaped and bone-shaped, etc.) to form grooves on the surface of the fiber. With the help of the wicking and moisture-conducting structure of the grooves, it quickly absorbs moisture and moisture on the skin surface. Sweat is excreted from the body instantly, and then the sweat is diffused and quickly evaporated by the fibers on the cloth surface, so as to achieve the purpose of absorbing moisture and perspiration, regulating body temperature, and keeping the skin dry and cool.

Weaving

In the weaving process, the fabric thickness, jacquard and elastic areas are reasonably arranged through the design of the jacquard process, which can meet the needs of human body for ventilation, lifting and elasticity, while making the fabric itself have a certain moisture absorption and perspiration function. For example, the RSJ 5/1 EL warp knitting machine is designed to form meshes of various sizes through the appropriate design of the jacquard weave, to ensure the smooth air circulation of the fabric, and make the fabric have excellent moisture permeability and breathability.

Fabric organization structure

The single-sided wet-conducting double-sided knitted fabric is developed by the structural method. The fabric adopts single-side jacquard weave, rib change weave or double rib change weave, and the inner layer is made of hydrophobic fibers such as fine denier polyester, polypropylene and other woven honeycomb or mesh points. Organization structure, the outer layer uses hydrophilic fibers such as cotton, wool, viscose, etc. to weave a high-density organization structure to increase the differential capillary effect of the inner and outer fabrics, and it can also realize the unidirectional moisture-conducting function.

One-way wet

In addition, the use of multi-layer structure fabrics to develop moisture wicking fabrics generally use polypropylene, polyester and other ultra-fine filaments in the inner layer, the middle layer is a moisture absorption layer composed of cotton yarn, and the outer layer is composed of fibers with high strength and good permeability, which can be used Double rib composite weaving can also realize the perspiration, breathability and soft feel of knitted fabrics.

Three-layer moisture-wicking fabric (1 is the outer side of the fabric, which is the moisture-absorbing and moisture-releasing layer of the fabric; 2 is the middle part of the fabric's outer layer, which is the wicking and moisture-transmitting layer of the fabric; 3 is the outer layer of the fabric The inner side of the fabric is the strong moisture absorption and storage layer of the fabric; 4 is the middle layer of the fabric, which is the elastic film of the fabric (formed by melting and shaping the polyurethane fiber); 5 is the inner layer of the fabric, which is the moisture absorption and quick-drying layer of the fabric)