Material aging is mainly manifested in discoloration, loss of light, loss of strength, cracking, peeling, chalking and oxidation. Although we all agree that the weathering and light resistance of the product is important, but for in the laboratory, is the use of UV aging test chamber manufacturers test or xenon lamp aging test?
1. Light (especially UV)
For durable materials, such as most coatings and plastics, short-wave UV light is the cause of most polymer aging. However, for materials that are not so durable, long-wave UV and even visible light can also cause serious harm to them.
2. High temperature
The damaging effects of light increase when the temperature increases, and while temperature does not affect the primary photochemical reactions, it does affect the subsequent chemical reactions. Laboratory aging tests must provide precise temperature control, and usually also accelerate aging by means of elevated temperatures.
Dew causes more damage than rain because it sticks to the material longer, creating more severe moisture absorption. However, what cannot be ignored is the thermal shock caused by a sudden drop in temperature. For example, when a car in a hot summer day temperature rise but suddenly due to showers and rapid heat dissipation, the rain in this case will produce stress erosion.
Any one of these three factors can cause material aging, and they often occur simultaneously, causing more harm than any factor acting alone. Therefore, in the laboratory, some materials have good durability under the action of light or moisture conditions alone, but often fail under the synergistic action of both.
UV aging tester manufacturers use fluorescent UV lamps to simulate the damaging effects of sunlight on durable and long-lasting materials. These lamps are electrically similar to the cold white lamps used for general lighting, but it mainly emits UV light rather than visible or infrared light.
UV aging test chamber manufacturers for different conditions of use, the need for different spectra and thus the choice of different types of lamps. Common types of lamps include UVA lamps and UVB lamps.