Flame retardant plastic

Some high performance plastics can be classified as flame resistant plastic, flame retardant plastic, non flamable plastic or inherently self extinguishing, making them suitable for use where fire protection is an issue. There are various standards which classify the flammability of plastics. Normally, the internationally accepted flammability test for plastics described in UL94 is performed.

Most of Ensinger's material technical datasheets contain information regarding the material's UL94 rating. Some of our materials are tested to verify their compliance with the requirements of the respective UL classification but are not Yellow Card certified. For additional information, please contact Ensinger Technical Services.

Flame resistant plastics according to UL94

Classification of flame resistant plastics according to UL94 follows these criteria:

UL94-HB plastic (horizontal burning):
Material burns and drips

UL94-V0 plastic (vertical burning): Burning period 10 seconds. After repeated flaming: 50 seconds, flaming drips are not admissible
UL94-V2 plastic (vertical burning): Burning period 30 seconds. After repeated flaming: Burning period 250 seconds, flaming drips are admissible
UL94-V1 plastic (vertical burning): Burning period 30 seconds. After repeated flaming: 250 seconds, flaming drips are not admissible