Technical InformationWeather Resistance Test
Accelerated weathering testing using Xenon Arc
(1) Test conditions
| Xenon irradiation | 100 W/m2 |
|---|---|
| Black panel temperature | 63±3 ℃ |
Place the test sample in the test chamber as described above and remove it at the predetermined intervals to conduct the following tests.
(2) Tensile test
| Test sample | TELENE®1650 |
|---|---|
| Testing method | As per JIS K7161-1, 2 |
| Test item | Tensile strength, tensile modulus |
| Test sample shape | Type-1B |
| Test conditions | Test speed: 50 mm/min (strength), 1 mm/min (modulus), Gauge length: 50 mm (contact extensometer used), distance between chucks: 115 mm Test temperature: 23°C Number of measurements: n = 5 |
| Test environment | 23±2℃、50±10％RH |
| Test machine | Universal Testing System–Model 5982 (manufactured by Instron) |
(3) Result
The test results are shown below.
(4) Calculation of the equivalent number of years
As stated in JIS D0205, the average annual dose of solar radiation exposure in Japan is 4,500 MJ/m2, and our calculation is based on this. The ratio of light in the 300–400 nm wavelength range in sunlight is 6.8%, and therefore the annual dose of exposure to light in this range is 4500 × 0.068 = 306 MJ/m2. The xenon irradiation for this test is 100 W/m2, hence:
306,000,000 (J/m2) / 100(W/m2) = 3,060,000 (sec)
3,060,000 (sec) / 3,600 = 850 hours
In other words, based on this dose of radiation exposure, 850 hours of xenon exposure is equivalent to
one year of solar exposure.
Thus, the equivalent number of years are calculated as below.
Xenon 100 W/m2
| Level | Equivalent number of years | Number of hours tested |
|---|---|---|
| 1 | 1 | 850 |
| 2 | 1.5 | 1275 |
| 3 | 2 | 1700 |
| 4 | 3 | 2550 |
| 5 | 4 | 3400 |
| 6 | 5 | 4250 |
| 7 | 5.8 | 4930 |
| 8 | 6 | 5100 |
| 9 | 7 | 5950 |
| 10 | 8 | 6800 |
| 11 | 9 | 7650 |
| 12 | 10 | 8500 |
