Fire rating UL94 is about the plastic material?
In industry we can often see a lot of plastic material with a UL94, what is UL94, represent what meaning?
UL94 combustible performance standards is the most widely used plastic materials. It is used to evaluate the ability of a material after being lit out. According to the combustion rate, burning time, resistance ability and drops bead is burning can have many kinds of evaluation method.
plastic flame retardant grade by HB, V - 2、V - V - 1 0 incremental step by step, and each level have been reflected during the test is not the same, which became A various levels of the relevant requirements:
94 v 0
A: didn't have any samples after the test flame away, there is still A flame burning more than 10 seconds.
B: for each 5 samples, lit after 10 times, with the flame of burning a total of no more than 50 seconds
C: don't have any samples on all the way up to the fixture
D: don't have any samples, combustion melting droplet drip lit below 12 'cotton.
E: don't have any samples, after the second removal of the test flame, for red combustion for more than 30 seconds.
94 v - 1
A: didn't have any samples after the test flame away, still have the flame burning more than 30 seconds.
B: for each 5 samples, lit after 10 times, with the flame of burning time does not exceed a total of 250 seconds
C: don't have any samples on all the way up to the fixture ( Including the flame combustion and burning of red)
D: don't have any samples, combustion melting droplet drip lit below 12 'cotton.
E: don't have any samples, after the second removal of the test flame, burning red more than 60 seconds.
94 v - 2
A: didn't have any samples after the test flame away, still have the flame burning more than 30 seconds.
B: for each 5 samples, lit after 10 times, with the flame of burning time does not exceed a total of 250 seconds
C: don't have any samples on all the way up to the fixture ( Including the flame combustion and burning of red)
D: allow sample combustion melting droplet drip lit below 12 'place of cotton, but cotton combustion time is shorter.
E: don't have any samples, after the second removal of the test flame, burning red more than 60 seconds.
HB: UL94 standard among the lowest in the flame retardant grade. Request for samples of 3 to 13 mm thick, burning speed is less than 40 mm per minute; Less than 3 mm thick sample, burning speed is less than 70 mm per minute; Or out in front of the sign of 100 mm.
hope the above knowledge can help you, we in the company of a cooling fan with 94 v - 0 in plastic, welcome customers consultation in need, thank you! ！
