UL94
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. UL 94 is a plastics flammability standard released by Underwriters Laboratories of the USA. Tests are generally conducted on a 5" x 1/2" (12.7 cm x 1.27 cm) specimen of the minimum approved thickness. For 5VA and 5VB ratings, tests are performed on both bar and plaque specimens, and the flame ignition source is approximately five times as severe as that used for testing the other materials. There are other classifications that apply to low density foam materials (HF-1, HF-2, HBF) and thin films (VTM-0, VTM-1, VTM-2).…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. UL 94 is a plastics flammability standard released by Underwriters Laboratories of the USA. Tests are generally conducted on a 5" x 1/2" (12.7 cm x 1.27 cm) specimen of the minimum approved thickness. For 5VA and 5VB ratings, tests are performed on both bar and plaque specimens, and the flame ignition source is approximately five times as severe as that used for testing the other materials. There are other classifications that apply to low density foam materials (HF-1, HF-2, HBF) and thin films (VTM-0, VTM-1, VTM-2).