What are the flame - retardant testing standards for flame - retardant artificial plants?

At present, the state does not have a clear flame-retardant reference standard for artificial plants. The flame-retardant standard for building materials can be used, or the UL94 flame-retardant standard for plastic products can be adopted.

 Among them, the building material standard refers to "GB 8624:2006: Classification of Burning Performance of Building Materials and Products", which divides flame retardancy into 7 grades: A1, A2, B, C, D, E, and F. Grade B flame retardancy is equivalent to Grade B1 in the previous standard, that is, the flame-retardant grade. Grade B flame retardancy requires that, under the condition of meeting GB/T 20284, the combustion growth rate index ≤ 120 W/s, and the total heat release within 600s ≤ 7.5MJ. 

The UL94 grade is the most widely applied standard for the combustibility of plastic materials. The flame-retardant grades of plastics increase gradually from HB, V-2, V-1 to V-0: 

HB: The lowest flame-retardant grade in the UL94 standard. For samples with a thickness of 3 to 13 mm, the burning rate should be less than 40 mm per minute; for samples with a thickness of less than 3 mm, the burning rate should be less than 70 mm per minute; or the sample should extinguish before reaching the 100 mm mark. 

V-2: After conducting two 10-second combustion tests on the sample, the flame extinguishes within 30 seconds. It can ignite the absorbent cotton 30 cm below.

 V-1: After conducting two 10-second combustion tests on the sample, the flame extinguishes within 30 seconds. It cannot ignite the absorbent cotton 30 cm below. 

V-0: After conducting two 10-second combustion tests on the sample, the flame extinguishes within 10 seconds. There should be no burning substances dropping.