The sample of Moisture Absorption and Perspiration Tester is covered on the electric heating test plate. The test plate and the thermal protection ring (protection plate) around and below can maintain the same constant temperature so that the electric heating test can be carried out. Heat from the plate can only be dissipated through the sample and the conditioned air. can flow parallel to the upper surface of the sample. Once the test conditions have reached steady state, the heat flow through the specimen is measured to calculate the thermal resistance of the specimen.
To measure moisture resistance, the porous electric heating test plate should be covered with a breathable but waterproof film. Water entering the electric heating plate evaporates and passes through the film as water vapor, so no liquid water enters.n contact with the sample. After the sample is placed on the film, the heat flow required to maintain a constant temperature The nature of the test plate at a certain water evaporation rate is measured and the moisture resistance of the sample is calculated as well as the water vapor pressure passing through the sample.
The moisture absorption and perspiration tester adopts an independent design concept, and the control system and automatic water supply system are integrated. Users can choose different environmental test boxes. Automatic water supply, automatic drainage system, powerful water adding system (during the moisture resistance test, the heating plate can penetrate water faster). It can quickly reach a stable test state. The machine automatically adjusts PID control parameters based on sample thickness and littlet quickly reach the test conditions.
The rise of moisture-wicking products dates back to the 1970s. Usually, the human body only notices the release of large amounts of sweat during intense exercise. In fact, even under normal mental conditions, the human body needs constant \"insensible evaporation\" to release heat and water vapor generated by the body\'s metabolism to maintain a constant body temperature. Therefore, how to use textile clothing in close contact with the skin to transfer heat and water vapor from the body surface to the outside world. Through a series of \"moisture absorption-conduction-evaporation\" processes, it not only forms the core of the moisture absorption and perspiration function of textile clothing, but also the core of the current function of moisture absorption and perspiration. The basis for the development of test methods for the moisture wicking function of all textile products.
The detection technology of the moisture wicking function of textile products is closely related to its design principle and processing technology. Some of the testing methods currently used include:
1. Conductive properties testing: Also known as “rise height” testing, the test sample is sampled in the directions of longitude and latitude. The sample to be tested is suspended vertically so that the lower end of the sample is immersed in water. After being left for a period of time, the height of the water line rising due to capillary action of the sample is recorded, so that the conductive performance can be compared. Good or bad. At the same time, the higher the rise, the better est the conductivity of the sample to humidity.
2. Determination of hygroscopicity: water droplets fall from a fixed height onto a flat surface of the test sample, and the time required for the water droplets to be absorbed by the sample is measured, usually in seconds. The shorter the absorption time of water droplets, the better the hygroscopic effect of the sample.
3. Evaporation or moisture permeability performance test: In addition to the two functional properties of moisture absorption and conduction, moisture absorption and perspiration Wicking products also have higher requirements for moisture permeability to form a complete overall effect.
Textile productsThe basic principle of product moisture permeability test is to give a certain amount of water to a fixed sample area, monitor the relationship between thequantity of water and time and convert it to evaporation rate. Commonly used units are moisture permeability per unit time and per unit area. excess.
WeChat platform on the scan Copyright：Qinsun Instruments Co., LTD! Qinsun Instruments Co., LTD!Provide technical support Enterprise email
