Flame-retardant fabrics are finished by special production technology to effectively prevent the spread of flames. The flame-retardant finished textiles can reduce their flammability in the flame, slow the spreading speed, and do not form large-area combustion; and after leaving the flame, it can reduce the flammability It extinguishes itself quickly, no longer burns or smolders, and has good washing resistance.
Combustion test method: According to the relative position of the sample and the flame, it can be divided into vertical method, 45° tilt method and horizontal method. The vertical method is generally used for the flame-retardant properties of clothing fabrics, decorative fabrics, and tent fabrics; the 45° tilt method is suitable for interior decoration fabrics in airplanes; the horizontal method is suitable for bedding fabrics such as carpets and automotive interior fabrics.
Polar oxygen index method: Put the clamped sample vertically into a transparent combustion cylinder with upward moving oxygen and nitrogen flow inside the cylinder, ignite the end of the sample, then observe the burning phenomenon, and compare its continuous burning time or The damage length can maintain the lower oxygen concentration required for combustion through a series of experiments with samples in different oxygen concentrations.