Outdoor simulation test standard of ultraviolet aging test box
The ultraviolet aging test box simulates the ultraviolet radiation and condensation in the sunlight of nature, and accelerates the weather resistance test of the material to obtain the result of the weather resistance of the material. By reproducing environmental conditions such as ultraviolet, rain, high temperature, high humidity, condensation, darkness, etc., they are combined into one cycle and let it execute the number of cycles automatically. Users who use an ultraviolet aging test box know that one of the most important features of the equipment is that it can simulate the destruction of materials that is closer to the actual outdoor humid environment. The time when the outdoor materials are exposed to moisture can be as long as 12 hours per day. The research results show that the main reason for this outdoor humidity is dew, not rain. Therefore, a special condensation principle is used to simulate outdoor humidity in the artificial accelerated weathering test.
The UV aging test chamber simulates the effects of outdoor moisture through a series of unique condensation principles. In the condensation circulation circle of the equipment, there is a water storage tank at the bottom of the tank body, and it is heated to generate water vapor. Hot steam maintains the relative humidity in the test chamber at 100% and maintains a relatively high temperature. The design of the product ensures that the test specimen actually constitutes the side wall of the test chamber, so that the back of the specimen is exposed to the ambient air in the room. The cooling effect of indoor air causes the surface temperature of the test piece to drop to a level a few degrees below the steam temperature. The appearance of this temperature difference leads to the liquid water generated by condensation on the surface of the test piece during the entire condensation cycle. This condensation product is very stable pure distilled water. This pure water improves the reproducibility of the test while avoiding water stains.
Since the time of outdoor exposure to moisture can be as long as 12 hours per day, the humidity cycle of the ultraviolet aging test chamber generally lasts for several hours. We recommend that each condensation cycle last at least 4 hours. Note that the UV exposure and condensation exposure in the equipment are carried out separately, which is consistent with the actual climatic conditions.
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