UV aging chamberThe device is another type of simulated light aging test equipment, which mainly simulates ultraviolet light in sunlight. At the same time, it can also reproduce the damage caused by rainwater and dew. The device conducts experiments by exposing the tested material to controlled cycles of sunlight and moisture, while increasing the temperature.
The equipment uses ultraviolet fluorescent lamps to simulate sunlight, and can also simulate moisture effects through condensation or spraying. In just a few days or weeks, the device can reproduce the damage that would take months or years outdoors. The damage caused mainly includes fading, discoloration, decreased brightness, powdering, cracking, blurring, brittleness, decreased strength, and oxidation. The test data provided by the equipment is of great help in selecting new materials, improving existing materials, or evaluating compositional changes that affect product durability. The device can predict the changes that the product will encounter outdoors very well.
Although ultraviolet light (UV) only accounts for 5% of sunlight, it is the main lighting factor causing a decrease in the durability of outdoor products. This is because the photochemical reaction of sunlight increases as the wavelength decreases. Therefore, when simulating the destructive effects of sunlight on the physical properties of materials, it is not necessary to reproduce the entire spectrum of sunlight. In most cases, simulating short wave UV light is sufficient.
The reason why UV accelerated weathering testing machines use UV lamps is that they are more stable than other lamps and can better reproduce test results. Using fluorescent UV lamps to simulate the effects of sunlight on physical properties, such as decreased brightness, cracking, peeling, etc., is a method. There are several different types of UV lamps to choose from. Most of these UV lamps mainly produce ultraviolet light, rather than visible and infrared light. The main difference between lamps lies in the total UV energy they generate within their respective wavelength ranges. Different lights will produce different test results. The actual exposure application environment can indicate which type of UV lamp should be selected