In recent years, people have higher and higher requirements for the comfort and functionality of clothing fabrics. As people spend more time outdoors, the trend of casual wear and sportswear interpenetrating and integrating has become increasingly popular among consumers. favor. The fabric of this type of clothing requires not only good comfort, but also requires that when sweating occurs during active activities, the clothing will not stick to the skin and produce a cold, wet, and heavy feeling. Therefore, new requirements for moisture absorption and sweat wicking functions have been put forward for fabrics.
However, general consumers are confused about the moisture absorption and perspiration of fabrics. In fact, these are two concepts, namely moisture absorption and moisture removal of fabrics.
First let’s talk about moisture absorption. Polyester is an example of a synthetic fiber. In fact, it has low water absorption and poor moisture permeability, and it is easy to feel stuffy during activities. Cotton is an example of a natural fiber. It has good hygroscopicity and is comfortable to wear, but when a person sweats a lot, , cotton fibers will swell due to moisture absorption and stick to the skin. At the same time, the moisture dissipation speed is also slow, thus giving the human body a cold and wet feeling.
Therefore, for all fabrics, especially polyester products, treating them with hydrophilic additives in the finishing stage is a good way to improve hygroscopicity.
But is this the end? Can the wearer stay dry by solving the problem of moisture absorption? Moisture absorption = perspiration?
Of course not! Only when the moisture absorbed in the fabric is discharged to the surface of the fabric as much as possible, and the moisture is fully evaporated under sunlight and good ventilation, can the wearer be kept dry and comfortable.
The moisture removal of fabrics mainly depends on the physical structure of the fibers. The gaseous moisture evaporated from the skin surface is first absorbed by the fabric (that is, moisture absorption, —- note, it is the fabric that absorbs moisture, not the fiber!) and then is absorbed by the pores (pores, micropores, grooves) inside the fiber and between the fibers. The capillary effect produced by the gaps allows moisture to be absorbed and diffused between fabrics. In this way, moisture migrates to the surface of the fabric and evaporates, thereby completing the moisture removal process.
Therefore, moisture absorption alone is not enough. For some ordinary synthetic fiber fabrics, only hydrophilic additives are used for finishing, and then the claims of moisture absorption and “perspiration” actually lead us all into a misunderstanding.
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