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FR Materials

Overview of FR Materials

— FR Materials (Fire Retardant Materials) are classified based on UL 94 flame classifications of each material. There are 6 flame classifications specified in UL 94 that are assigned to materials based on the results of these small-scale flame tests. These classifications listed in descending order for each of the following three groupings are used to distinguish a material's burning characteristics after test specimens have been exposed to a specified test flame under controlled laboratory conditions. These classifications relate to materials commonly used in manufacturing enclosures, structural parts and insulators found in consumer electronic products (UL 94 5VA, 5VB, V-0, V-1, V-2, HB).
  • For more details, see: UL Flame Classifications for Plastics

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