Tips: Nantong Bao Jian: Flame Retardant Grade and Flame Retardant Standard Test

This article will share with you some of the relevant knowledge of flame retardant grades and flame retardant standard tests for reference.

The American flame retardant material standard is ANSI/UL-94-1985 standard: There are five kinds of UL94 test: Level B horizontal burning test; 94V-0, 94V-1, 94V-2 level vertical burning test; 94 5-V level Vertical flame test; Flame spread index test using a radiant panel (measured in accordance with ASTM E162 standards); 94VTM-0,94VTM-1, 94VTM-2 grade vertical burn test (VTM refers to extremely thin material not reproduced here The introduction is as follows:

1.94 HB level of horizontal combustion test method: This test uses a long sample of 127mm, width 12.7mm, maximum thickness of 12.7mm, minimum thickness of 3.05mm. In a windless test chamber. For material rated 94HB, when the sample thickness is 12.7mm, the burning speed on the 76.2mm gauge length is not greater than 38.1mm/min, or when the specimen thickness is less than 3.05mm, the burning speed is not greater than 38.1mm/min or Before the 102mm mark is reached, combustion must be stopped.

2.94V-0, 94V-1, 94V-2 vertical combustion test method: UL94 vertical combustion test according to the sample burning time, whether the droplet ignites the cotton and other test results, the polymer material as V-2, V-1, V-0 and 5-V are four grades, among which V-2 is the lowest flame retardant grade, and 5-V is the highest flame retardant grade.

94V-0, 94V-1, 94V-2 class test method: This test strip sample length 127mm, width 12.7mm, maximum thickness 12.7mm. In the windless test chamber. The upper end of the specimen (6.4 mm) was clamped with a holder on the holder and the vertical axis of the specimen was kept perpendicular. The lower end of the specimen is 9.5 mm from the nozzle and 305 mm from the surface of the dry absorbent cotton. The Bunsen burner was ignited and adjusted to produce a blue flame of 19 mm height. The Bunsen burner flame was placed at the lower end of the specimen, ignited for 10 s, then moved to the flame (at least 152 mm away from the specimen), and noted that the specimen had flame Burning time. If the flame of the sample is extinguished within 30 s after moving to the flame, the Bunsen burner must be moved to the bottom of the sample again. Reignite the sample and ignite for 10 seconds. Then remove the Bunsen burner flame again and note the flaming combustion of the sample. And the flameless burning time. If there is a smoke drop in the sample, allow it to fall on the 305 mm absorbent cotton under the sample to see if it ignites the absorbent cotton. If absorbent cotton catches fire, its factors should be taken into account when rating.

These are all the contents of the flame retardant grade and flame retardant standard test that Xiaobian shared for everyone. I hope to help everyone.