Commonly used flame-retardant performance test methods are the combustion test method and the polar oxygen index method. Among them, the burning test method is divided into vertical method, 45° tilt method and horizontal method. Different test methods are used for different flame-retardant fabrics.
The vertical method stipulates that the sample is placed vertically, and the combustion source is below the sample to ignite the sample. The minimum ignition time, continued burning time, flame retardant time, flame spread speed, damage length, damage area, etc. and flame retardancy of the sample are tested Related indicators. The vertical burning method is mainly used for the flame retardant test of clothing textiles, curtains and other fabrics.
The 45° tilt method stipulates that the sample is placed at a 45° tilt, the combustion source is on the upper or lower surface below the sample to ignite the sample, and the time required for the sample to burn a certain distance upward, or the continuous combustion after the sample is burned , Flame-retardant time, flame spread speed, carbonization length, carbonization area, or the number of times the measurement sample burns to a certain distance from the lower end of the sample and needs to be exposed to the flame. The 45° tilt method is mainly used for flame retardant testing of carpets and other fabrics.
The horizontal method stipulates that the sample is placed horizontally, ignited at the tip of the sample, the spread distance of the flame on the sample and the time it takes to spread this distance are measured, the burning rate is calculated, and the burning rate is used to characterize the flame retardancy of the fabric. The horizontal method is mainly used for flame retardant testing of automotive interior decoration materials.