The working principle of UV aging test chamber takes UV lamp as the light source, through controlling irradiance, blackboard temperature, condensation, rain and other factors. It simulates the UV energy of outdoor light and conditions such as rain and dew, and conducts artificial accelerated aging test on samples. Compared with other light sources, the UV accelerated aging multiplier is higher and more suitable for rapid screening of specific materials. It is widely used in automotive materials, plastics, packaging, paints and coatings, inks, pigments, dyes, stabilizers and additives, photochemical materials, industrial and surface textiles, etc.
The operating principle of UV aging test chamber only needs to strictly adhere to the rules of experimental conditions. The reproducibility of the results can be improved. And the compatibility between natural and artificial climate aging can also be improved. The purpose of artificial climate aging or artificial radiation exposure of coatings with a xenon arc lamp with a filter light is to expose the radiation energy H after a certain exposure. The purpose is to make a certain degree of change in selected functions or to obtain a certain degree of radiation exposure required for aging. *The main function of the selected coating in practice. The exposed coating can be compared with the function of the unexposed coating (comparison specimen). Or compare it with the function of other exposed coatings (reference specimens) whose aging state is known when tested in an exposed facility.
In the natural climate aging process. Solar radiation is the main factor in the aging of coatings. The same principle is true for the (solar) radiation exposed under glass panels. Thus, for artificial climate aging and artificial radiation exposure, it is particularly important to imitate this parameter. The xenon arc radiation source is equipped with different filter systems that can change the spectral division of the radiation that occurs, which can imitate the spectral division of solar radiation and the UV and visible scale of solar radiation filtered by 3 mm thick window glass, respectively.
When experimenting in the exposed equipment, the irradiance E may change because of the aging of the xenon arc lamp and the filter system. This change occurs especially in the UV scale where the photochemical effect on polymeric materials is zui. Therefore, it is not only necessary to record the time of exposure. Therefore, it is not only necessary to record the time of exposure, but also to measure the exposed radiant energy H in the wavelength range below 400 mm or at regular wavelengths such as 340 mm, and use these values as reference values for the aging of the coating.
In this specification, the operating principle of the UV aging tester is used in the terminology of artificial climate aging to differ from natural climate aging. The solar radiation experiment imitated by glass filtering is referred to as artificial radiation exposure.