The testing technology for the moisture wicking function of textile products is closely related to its design principles and processing techniques. At present, there is no single method or standard at home and abroad that can cover all different types of moisture wicking textile products. Some of the methods currently used Includes:
1. Determination of hygroscopicity:
A water droplet is dropped from a fixed height onto a flat test sample surface, and the time required for the water droplet to be absorbed by the sample is measured, usually in seconds. The shorter the time for water droplets to be absorbed, the better the hygroscopic effect of the sample. The corresponding standard for this measurement method is the American AATCC79.
2. Test of conductive performance:
Also known as the “climb height” test, the test sample is sampled in both longitude and latitudinal directions. The test sample is hung vertically so that the lower end of the sample is immersed in water. After being left for a certain period of time, the height of the water line climbing due to capillary action of the sample is recorded, so that the conductive performance can be compared. good or bad. In the same time, the higher the climb, the better the sample’s conductivity to humidity. The corresponding standards used more internationally include Japan’s JISL10968.26, JISL10188.36 and JISL1907.
3. Test of evaporation or moisture permeability:
In addition to the two functional properties of moisture absorption and conduction, moisture wicking products also have high requirements on moisture permeability to achieve a complete overall effect. The basic principle of testing the moisture permeability function of textile products is: give a certain amount of water to a fixed sample area, monitor the relationship between the water amount and time, and convert it into an evaporation rate. The commonly used units are moisture per unit time and unit area. The amount of transmission. Obviously, within the same period of time, the higher the evaporation rate, the better the moisture permeability function. The corresponding foreign standards include British BS7209, American ASTME96 and Japanese JISL1099.
In fact, the so-called “moisture permeability” here refers to the amount of moisture that textiles allow to penetrate under specific environmental conditions. The so-called “moisture” is not the same as visible sweat. Generally speaking, moisture in the human body comes with the heat generated by metabolism. The moisture permeability of textile clothing has a great impact on wearing comfort. The water vapor of the human body is discharged from the body surface through the clothing into the outside air. If the moisture permeability of the clothes is not good, the water vapor generated on the body surface will slowly condense into water droplets after a period of time and gather between the body surface and the clothes, causing people to feel hot (humid) or cold. Directly affects the comfort of the human body. Generally, outerwear with waterproof effect, or textiles that have been coated or compounded, are often required to have moisture-permeable functions. The reason is that after the original organizational structure of this type of textile is processed, the coating or film used may cause the tissue pores to become smaller, sometimes so small that moisture cannot pass smoothly. Therefore, in order to take into account the comfort of wearing , the moisture permeability function must also be taken into consideration.
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