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Test Procedure of Vertical Flammability Tester

Vertical Flammability Chamber for measuring the vertical flame spread for children’ sleepwear, fabrics, other textile materials or resilient filling materials used in upholstered furniture. Comprises a draft free stainless steel cabinet with observation window and back wall painted black for easy test viewing. This tester is used to detect children's pajamas or decorative fabrics, combustion performance of foam, also it’s suitable for the determination of aviation and transport materials, burning resistance of the tents and protective clothing.


Open the test chamber door and hang the sample holder together with the specimen in the test chamber.Close the door, then the power indicator light should be bright, according to the ignition switch, lit the ignition device, to be 30s flame stability, press the start switch, so that the ignition is moved to the sample below, lit the sample. At this point from the sample from the sealed container to take out the time must be within lmin.12s, the ignition back to the original, continued to start the chronograph timer, to be continued to stop, immediately press the timer to stop the switch, the flame retardant timer began to wait until the flame stop, press the timer to stop the switch. Read the burning time and flame retardant time, the reading should be accurate to 0.1 s.


When testing the fabric made of fusible fiber, if the test sample is produced in the process of burning droplets, should be in the bottom of the box at the bottom of 10mm thick cotton. Note whether the melt off is caused by the burning or flame retardant of the absorbent cotton and recorded. Open the front door of the test chamber, remove the sample holder, remove the sample, first along the length of the carbonization of the direction of the fold, and then on the side of the specimen side, from its bottom and side about 6mm, The weight of the unit area of the weight of the selection of heavy hammer, and then slowly lift the sample at the bottom of the other side, so that the hammer floating, and then down, measuring the length of the tear tear, that is, the length of damage, the results accurate to 1mm The Remove the debris from the chamber and vent the ventilation equipment, remove the smoke and gas from the test chamber, and then test the next sample.

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