UV Accelerated Weathering Tester is also called ultraviolet accelerated aging test machine/ultraviolet light weather resistance test box/ultraviolet aging test box, which is mainly used to simulate the destructive effect of sunlight, humidity and temperature on materials. The UV Accelerated Weathering Tester reproduces damage that can occur outdoors for months or years by simulating sunlight, condensation, and natural humidity, where specimens are tested in a simulated environment for days or weeks. So what are the elements of the UV Accelerated Weathering Tester to simulate climate aging? The following is the sharing of the high-sky test equipment editor:
Different materials have different sensitivity to light. For durable materials, such as most coatings and plastics, the short wavelength band of UV light is responsible for the aging of most polymers. However, for less durable materials, such as some pigments and dyes, the long wavelengths of UV and even visible light can cause severe aging.
2. High temperature
As the temperature increases, the destructive effect of light will also increase. Although temperature does not affect the primary photoreaction, it affects the secondary chemical reaction. Laboratory UV aging test chamber aging test must provide precise temperature control, usually through the method of heating to accelerate the aging process.
Dew, rain and high humidity are the main causes of moisture hazards. Studies have shown that items placed outdoors will be wet for a long time (8-12h per day on average. The study found that dew formed by moisture is a major factor in outdoor humidity, and dew is more harmful than rain because it adheres to Longer time on the material, causing more severe moisture absorption. Of course, the rain is also very harmful to the material, and the rain will cause thermal shock. For example, a car whose temperature rises on a hot summer day is suddenly damaged by a shower. Rapid cooling will cause shock phenomenon. Mechanical erosion caused by rain erosion will also accelerate the aging of materials. For example, wood coating will remove the surface aging layer due to rain washing, and expose the unaged inner layer to sunlight, resulting in further Ageing.
To sum up, UV Accelerated Weathering Tester has three elements to simulate climate aging-light, high temperature and humidity. Any of these three elements can cause aging damage to materials, but they often act at the same time, and the harm caused will be greater than The individual effects of any of these factors.