UV Aging Tester Working Principle
UV Weathering Tester (XB-OTS-UVA/B) is applicable to non-metallic materials, organic materials (such as: paint, paint, rubber, plastics and their products), under the change of sunlight, temperature, humidity, condensation and other climatic conditions Check the degree of aging of related products and materials. The types of hazards include browning, discoloration, loss of light, chalking, cracking and foaming, deterioration of embrittlement strength, and oxidation to evaluate the weather resistance of the test product.
UV aging tester working principle:
UV weather resistance test equipment is another kind of photoaging aging test equipment, which mainly simulates ultraviolet light in sunlight. At the same time, it can also reproduce the damage caused by rain and dew. The device tests by exposing the material to be tested to a controlled cycle of alternating sunlight and moisture while increasing the temperature. The device uses ultraviolet fluorescent lamps to simulate sunlight, and can also simulate the effects of moisture by condensing or spraying.
It only takes a few days or weeks, and the device can reproduce the damage that can take place outdoors for months or years. The damage caused mainly includes fade, discoloration, drop in brightness, chalking, cracking, blurring, embrittlement, drop in strength, and oxidation. The test data provided by the equipment can be of great help in the selection of new materials, in the improvement of existing materials, or in evaluating the compositional changes that affect the durability of the product. The device can test the changes that the product will encounter outdoors.
Although ultraviolet (UV) only accounts for 5% of sunlight, it is the main lighting factor that causes the durability of outdoor products to decline. This is because the effect of the photochemical reaction of sunlight increases as the wavelength decreases. Therefore, in simulating the damaging effects of sunlight on the physical properties of the material, there is no need to reproduce the entire spectrum of sunlight. In most cases, only short-wave UV light needs to be simulated. UV light accelerated weathering testers use UV lamps because they are more stable than other lamps and can reproduce the test results better. Fluorescent UV lamps are used to simulate the effects of sunlight on physical properties, such as brightness reduction, cracking, spalling, etc., which are the best methods. Since the exposure time to outdoor exposure to moisture can be as long as 12 hours per day, the humidity cycle of UV accelerated weathering testers typically lasts several hours. We recommend that each condensing cycle lasts at least 4 hours. Note that the UV exposure and condensation in the device are performed separately.