The xenon arc lamp exposure AATCC TM 169 textile weatherability test provides a procedure for exposing various textile materials, including coated fabrics and their products, to artificial climate equipment with controlled test conditions. The test method includes a test procedure using both wet and dry specimens.
The textile material sample to be tested and the reference standard are simultaneously exposed to xenon arc lamp under specified conditions, and the degradation resistance of the material is evaluated by comparison with the reference standard.
The test can use different models of atmospheric arc test apparatus, but the test apparatus must be made of corrosion-resistant materials, and can automatically control the radiance, humidity, box air temperature and blackboard thermometer or blackboard standard thermometer temperature.
Xenon arc lamp light source:
The xenon arc lamp tester uses a long quartz built-in atmospheric arc lamp as the radiation source, emitting radiation from below 270nm in the ultraviolet spectrum to the visible spectrum, to the infrared spectrum. When the xenon arc less for the same general type, in some different sizes and types of instruments, to use different power range of different sizes of xenon arc lamp. In different models, the specimen holder varies with the size and power range of the xenon arc lamp in order to make the irradiance of the surface of the specimen placed in the standard specimen holder measured at 340 nm is 0.35 W/m2. Depending on the test cycle method, choose one of the test procedures to operate the xenon arc lamp tester.
In order for the xenon arc lamp to simulate earth daylight, a filter must be used to filter the short wavelengths of ultraviolet radiation. In addition, filters can also be used to filter out infrared light radiation and prevent heating of the specimen that is not present and that can cause thermal degradation that is not present in outdoor exposures.
Ammonia arc lamp instruments should be equipped with daylight filters to provide an appropriate spectrum. The daylight filter should meet the requirements for relative spectral energy distribution as specified in Appendix A.
Result in an irradiance of (0.35 ± 0. 01) W/m2/nm at 340 nm or (40 f ± 1. 5 } W/m2 at 300-400 nm. Depending on the test cycle method, select one of the test procedures to operate the atmospheric arc lamp tester.
Test cycle to determine:
1. The test cycle is determined by the end-use influencing factors, especially the climatic conditions influencing factors. However, not all materials are affected by the same environment is the same. The results obtained from any one test cycle are not representative of other test cycles or other outdoor climate tests. Accelerated test factors obtained for one geographic location are not necessarily applicable to any other geographic location. However, some test cycles have been used to categorize similar climates with respect to test-related cycles.
2. The properties of the test material help to select the appropriate test cycle, including UV exposure, wetting, wetting time and temperature. The instrument must be equipped with a continuous spectral monitoring device to control irradiance at 340 nm to (0.35 ± 0.01) W/m2/nm, or 300 a 400 nm to (401 I.5} W/m2, unless otherwise specified. For textile materials, the following test cycle methods can be selected.
3. Method 1: This test cycle is used to simulate a subtropical climate, such as South Florida, 120min cycle, only 90min exposure, relative temperature of 70% ± 5%, alternating 30min of light and water spray, blackboard temperature 77 ℃ Shi 3 ℃ (170 ± 5).
Method 2: This test cycle is used to simulate a subtropical climate, such as South Florida, when the water supply system is restricted: 120min cycle, 60min exposure only, 70% relative humidity ± 5%, alternating 60min of darkness, blackboard temperature 77°C soil 3 ℃ (170°F ± 5°F), no water spraying.
5. Method 3: This test cycle was used to simulate a semi-arid climate, such as Phoenix, Arizona, with continuous light exposure, no water spraying, blackboard temperature 77 °C ± 3 °C (170 °F ± 50 °F), and relative humidity 27% ± 3%.
6. Method 4: This test cycle was used to simulate a mild climate, such as Columbus, Ohio, 120 min cycle, 102 min exposure only, relative temperature SO% ± 5%, alternating 18 min of light and water spray, blackboard temperature 63 °C soil 3 °C ( 145 °F ± 5 °F).
7. The use of these cycles is not meant to be a method of accelerated climate testing. This test method is not limited to the use of these cycling methods.
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