Flammability UL 94 V
This method is used to determine the UL 94 V-0, V-1 and V-2 flammability ratings.
It evaluates both the burning and afterglow times after repeated flame application and dripping of the burning test specimen.
Pre-treatment:
2 days / 23 °C / 50% relative humidity
7 days / 70 °C / hot air oven
| Flame application | 20 mm high Tirill burner flame |
| Flame application time | 2 x 10 s |
| The second flame application time begins as soon as the ignited specimen is extinguished or immediately if the specimen does not ignite. | |
| Flammability rating UL 94 | |||
| V-0 | V-1 | V-2 | |
| Burning time after flame application (s) | ≤10 | ≤30 | ≤30 |
| Total burning time (s) (10 flame applications) | ≤50 | ≤250 | ≤250 |
| Burning and afterglow times of specimens after second flame application (s) | ≤30 | ≤60 | ≤60 |
| Dripping of burning specimens (ignition of cotton batting) |
no | no | yes |
| Specimens completely burned | no | no | no |
