There are various methods to evaluate
the flame retardancy of plastics.
The following table summarizes the fire retardant classification
according to UL standards, FM4910, the JIS, and the oxygen index. |
Standard
|
TND |
ESND |
FMND |
PCNDL |
PETND |
PETND MR |
| UL94 |
V-0(Except77348),
5VA(77665) |
V-0 |
V-0(7605),
5VA(7605) |
HB |
HB |
HB |
| FM4910 |
not listed |
not listed |
listed |
not listed |
not listed |
not listed |
|
| FM4910 is a test protocol that stipulates
the allowable quantity of smoke produced by the burning of plastics,
and the flame retardancy level of plastics used in clean rooms
as established by FM Approvals. The standard is closely related
to that of loss prevention in the case of a fire in semiconductor
and LCD manufacturing facilities and to the demands of fire insurance
companies. Criteria of the FM4910 standard is much higher than
that of the UL94 standard. |
|
