1. Temperature Control
Temperature control is very important for ultraviolet light aging test. When irradiated by ultraviolet light, temperature does not participate in the photochemical reaction of the test material, but temperature can affect the rate of light reaction. Generally, The rate of light reaction becomes faster as the temperature increases. Therefore, temperature control also becomes very important when irradiating ultraviolet light. During the UV aging test, the appropriate temperature can be selected according to the intensity of the UV light, and it is generally set between 50°C and 80°C. In addition, the blast system is used to make the temperature distribution in the box more uniform.
2. Ultraviolet Light Irradiation
The main core function of the UV test chamber is ultraviolet light irradiation, which simulates the most harmful ultraviolet light in sunlight. The ultraviolet light content in sunlight is only 7%, but the main factor of degredation in the natural environment is the effect of ultraviolet light. In the aging test, generally only need to simulate the ultraviolet light. When testing the material, the test material needs to be covered by the ultraviolet light in all directions. At present, the ultraviolet light test machine can carry out the full coverage of ultraviolet light.
3. Dew Condensation
The dew condensation function of the UV accelerated weathering tester mainly simulates the dew in the natural environment. In the test chamber, the water in the water sink is heated to generate a large amount of water vapor to keep the humidity in the box at 100%. The high-temperature water vapor condenses on the relatively cold surface of the test sample to produce a condensation effect, which can produce an adverse effect on the test product. In the process of dew condensation, the general test needs to last for 12 hours to see obvious results.
4. Water Spray
The water spray function of the UV accelerated weathering tester is an additional feature that simulates the effects of rain or moisture on the material being tested. It involves the use of a water spray system that sprays water onto the surface of the material during the testing process. The water spray function is typically used in combination with the UV radiation to create a more realistic and comprehensive simulation of outdoor weathering conditions. During the test, water is sprayed onto the material at specific intervals or continuously, depending on the test parameters and requirements.