Flammability UL 94 V
50 W, 20 mm Vertical
This method is used to determine the UL 94 V-0, V-1 and V-2 flammability ratings.
The test evaluates both the burning and afterglow times and dripping of the burning test specimen.
Pre-treatment:
2 days / 23 °C / 50 % relative humidity
7 days / 70 °C / hot air oven
| Flame height | 20 mm |
| Flame application time | 2 x 10 s |
| The second flame application time begins as soon as the first burning time ends | |
| Flammability rating UL 94 V | |||
|---|---|---|---|
| Test criteria | V-0 | V-1 | V-2 |
| Burning time of each individual test specimen (s) (after first and second flame applications) |
≤10 | ≤30 | ≤30 |
| Total burning time (s) (10 flame applications) |
≤50 | ≤250 | ≤250 |
| Burning and afterglow times after second flame application (s) | ≤30 | ≤60 | ≤60 |
| Dripping of burning specimens (ignition of cotton batting) |
no | no | yes |
| Combustion up to holding clamp (specimens completely burned) |
no | no | no |
