A brief introduction
Ultraviolet radiation is the main cause of degradation in almost all materials exposed to outdoor environments. The QUV aging testing machine simulates the ultraviolet part of sunlight, and the UVA-340 lamp tube can best simulate the short wavelength of sunlight. It is particularly suitable for comparing the performance differences between different types of polymers and stabilizers. It is the best lamp tube for material correlation research.
Detailed introduction of QUV aging testing machine
Equipment features:
QUV provides two moisture simulation methods. The most commonly used method is condensation, which is the best way to simulate outdoor moisture erosion. All QUV models can operate condensation cycles. Because some application conditions also require the use of water spray to achieve actual results, some QUV models can operate both condensation and water spray cycles.
QUV provides two moisture simulation methods. The most commonly used method is condensation, which is the best way to simulate outdoor moisture erosion. All QUV models can operate condensation cycles. Because some application conditions also require the use of water spray to achieve actual results, some QUV models can operate both condensation and water spray cycles.
condensation
In many outdoor environments, materials can be damp for up to 12 hours per day. Research has shown that the main factor causing outdoor humidity is dew, not rainwater. QUV simulates outdoor moisture erosion through its unique condensation function. In the condensation cycle, water vapor is generated by heating the bottom water tray of the testing machine. The hot water vapor maintains 100% relative humidity in the test chamber at higher temperatures. In the design of QUV, the sample actually forms the sidewall of the test chamber, and the back of the sample is exposed to the indoor air in the laboratory. The cooling effect of indoor air causes the surface temperature of the sample to be several degrees lower than the temperature of water vapor, ensuring that water vapor will continuously condense on the surface of the sample. This type of condensate is very stable and pure distilled water.
Water spray
Under certain practical application conditions, such as sunlight, when the accumulated heat rapidly dissipates due to sudden showers, the temperature of the material will undergo a sharp change, resulting in thermal shock, which is a test for many materials. The water spray of QUV can simulate thermal shock and/or stress corrosion.
Application standards
Simulation of UV light and sunlight
Ultraviolet light is the main factor causing photodegradation of outdoor products. QUV fluorescent lamps can simulate the most important shortwave ultraviolet light in sunlight, reproducing the aging of material physical properties caused by light exposure. According to different testing conditions, there are several different types of UV lamps to choose from. Please refer to Q-Lab technical document LU-8160: "Selection of Lamp Tube" application guide for details.
QUV lamp tube
UVA-340 lamp tube The UVA-340 lamp tube can simulate shortwave ultraviolet light in sunlight excellently, ranging from 365 nanometers to 295 nanometers at the solar cutoff point.
UVB-313 lamp tube The short wave ultraviolet light emitted by UVB-313 tubes is stronger than the sun's ultraviolet light that typically shines on the surface of the Earth, thereby accelerating material aging to the greatest extent possible. However, the lamp tube may cause unrealistic damage to certain materials. UVB-313 lamps are mainly used for quality control and research and development, or for testing materials with strong weather resistance.
technical parameter