燃烧等级
|
V0
|
V1
|
V2
|
单个样品的t1 /t2
|
≤10S
|
≤30S
|
≤30S
|
所有样品的 t1 +t2
|
≤50S
|
≤250S
|
≤250S
|
单个样品的 t2 +t3
|
≤30S
|
≤60S
|
≤60S
|
是否燃尽
|
否
|
否
|
否
|
是否点燃棉花
|
否
|
否
|
是
|
燃烧等级
|
5VA
|
5VB
|
单个样品的余焰和余燃时间
|
≤60S
|
≤60S
|
是否点燃棉花
|
否
|
否
|
单个样品的t2+t3
|
≤30S
|
≤30S
|
是否被烧穿
|
否
|
是
|