Plastic products in the classification of fire levels is how the standard ah?
Flammability rating, that is, the material has or the material has been treated with a postponement of the nature of the flame spread, and the division of the system. 1, the plastic flame retardant grade from HB, V-2, V-1 to V-0 step by step increase: HB: UL94 and CSAC22.2No0.17 standard in the bottom of the flame retardant grade, requiring for 3 to 13 mm thick Sample, burning speed less than 40 mm per minute; less than 3 mm thick sample, burning speed less than 70 mm per minute; or 100 mm mark before extinguishing. V-2: After two 10-second burn tests on the sample, the flame is extinguished in 60 seconds. There can be a burning thing falling. V-1: After two 10-second burn tests on the sample, the flame is extinguished in 60 seconds. Can not have a burning thing falling. V-0: After two 10-second burn tests on the sample, the flame is extinguished in 30 seconds. Can not have a burning thing falling. 2, UL classification of plastic material burning grade? UL is the plastic material standard test piece after the flame burning after the spontaneous combustion time, spontaneous combustion speed, falling particles to determine the state of the burning of plastic materials, according to the level of good and bad, followed by HB, V2, V1, V0, 5V, There are very thin material grades VTM-0, VTM-1, VTM-2, and foam material grades HBF, HF-1, HF-2.
About UL94 Flammability Rating Series Description UL94 Flammability Rating Series Introduction Introduction UL94 - Tests the flame resistance of plastic materials in equipment and installations. This standard is based on the flame resistance of plastic materials, including a range of each level. The rank represents HB horizontal combustion (HorizontalBurn), with only one grade possible. V vertical burn (VerticalBurn), there are three levels: V-0 is the highest, V-1 is low, then V-2.5V vertical combustion (VerticalBurn), the use of large 125mm flame, there are 1 or 2 level 5V -A or 5V-B. VTM vertical thin material (VerticalThinMaterial), and V grade of the same type of possibility, but behind the TM plus TM.
Flammability UL94 grade is the most widely used standard for combustible properties of plastic materials. It is used to evaluate the ability of the material to be extinguished after being ignited. According to the burning speed gallbladder Ding book scratching calcium difference water to promote the alarm, burning time, anti-drop ability and drop beads can burn a variety of judging methods. Each test material can be a lot of values ??depending on color or thickness. When a material of a product is selected, its UL grade shall meet the thickness requirements of the wall part of the plastic part. UL grade should be reported along with the thickness value. It is not enough to report only UL grade without thickness. Plastic flame retardant grade by HB, V-2, V-1, to V-0 step by step increase. 1.HB: UL94 standard in the bottom of the flame retardant grade. Requires a sample with a burning rate of less than 40 mm per minute for samples of 3 to 13 mm; a sample less than 3 mm thick, a burning rate of less than 70 mm per minute; or extinguished at 100 mm mark. 2. V-2: After two 10 seconds of burning test, the flame was extinguished in 60 seconds and no burner could fall. 3.V-1: After two 10-second burn tests on the sample, the flame was extinguished in 60 seconds and no combustibles could fall. 4.V-0: After two 10-second burn tests on the sample, the flame is extinguished in 30 seconds and no combustibles can fall.
