How is the resistance of PC plate classification?
PC plate flame retardant: national industry standard GB50222-95, PC plate flame retardant level, that is, B1 level. PC board itself ignition point is 580 DEG C, after the Xuan fire self-extinguishing, combustion is not easy to cause harmful gases, not easy to promote the spread of the fire.
The following analysis of the flame retardant grade of plastic from HB, V-2, V-1,V-0,9VB gradually increased to 9VA: HB: UL94 specification of the lowest flame retardant grade. For 3 to 13mm thick samples, the combustion rate is less than 40mm per minute; For samples less than 3mm thick, the combustion rate is less than 70mm per minute; Or extinguish it before the 100 mm mark.
V-2: After two 10-second combustion tests on the sample, the residual flame and residual flame will be extinguished within 60 seconds. Drops of particles can ignite cotton wadding
V-1: After two 10-second combustion tests on the sample, the residual flame and residual flame will be extinguished within 60 seconds. Drops of particles do not ignite lint
V-0: After two 10-second combustion tests on the sample, the residual flame and residual flame will be extinguished within 30 seconds. Drops of particles do not ignite lint
9VB: After five 5-second combustion tests on the sample, the residual flame and residual flame will be extinguished within 60 seconds. Drops of particles do not ignite lint. Allow to burn through small samples
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