| FLAMMABILITY
OF THERMOPLASTICS |
|
VERTICAL
AND HORIZONTAL BURN TESTS (UL94)
|
HB
Slow burning of horizontal test specimen
Burning rate <76
mm/min. for thickness lower than 3mm
Burning rate <38
mm/min. for thickness more than 3mm
V - 0
The burning of vertical test specimens, to be over within
10 sec. after the
application of the test flame.
Not have any specimens
that drip flaming particles.
V
- 1
The burning of vertical test specimens, to be over within
30 sec. after the
application of the test flame.
Not have any specimens
that drip flaming particles.
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 |
V
- 2
The burning of vertical
test specimens, to be over within
30 sec. Be permitted
to have specimens that drip flaming particles
|
|
GLOW
WIRE TEST
 |
This is a
preferred test standard for electrical applications.Simulate
the thermal stress that might be issued by a hot source.
Evaluate flammability hazards and extinction capabilities.
The glow wire, brought to a given temperature (550, 650,
750, 850, 960°C) is applied on the sample positioned
vertically by a 1 newton force for 30 sec. The measurement
is the time elapsed between the application of the wire
and the ignition of the sample and the control of the
dripping. |
The material passes the test
under the following conditions;
- Total absence of flame and
non continuous glowing
- In case of ignition, the
same must last less than 30 sec. after remowing the wire.
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