The UL 94 tests are conducted on plastic materials to measure flammability characteristics, giving a preliminary indication of their suitability for a particular application. The tests determine 12 flame classifications of materials for specific applications.
Six of the classifications relate to materials commonly used in manufacturing enclosures, structural parts and insulators found in consumer electronic products (5VA, 5VB, V-0, V-1, V-2, HB). Three of the remaining six classifications relate to low-density foam materials commonly used in fabricating speaker grills and sound-deadening material (HBF, HF-1 and HF-2). The last three classifications are assigned to very thin films, generally not capable of supporting themselves in a horizontal position (VTM-0, VTM-1, and VTM-2), usually assigned to substrates on flexible printed circuit boards.
These tests determine the material's tendency either to extinguish or to spread the flame once the specimen has been ignited.
Sample dimensions, quantities, mounting, substrate and conditioning requirements
for this test are confirmed with you before testing begins.
Contact our technical team for the sample requirements for your product.
- Equipment used
- UL 94 flammability test chamber
- Reported measurements
- Flame classification (5VA, 5VB, V-0, V-1, V-2, HB, HBF, HF-1, HF-2, VTM-0, VTM-1, VTM-2)