Flame retardant fabric testing method – combustion test method
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Flame retardant fabric combustion test method for textile flame retardant fabrics
The combustion test method is mainly used to determine the damage length, afterburning time and smoldering time of the sample. A sample of a certain size is ignited in a prescribed combustion box with a prescribed fire source for 12 seconds. After the fire source is removed, the afterburning time and smoldering time of the sample are measured. After the smoldering stops, measure the damage length according to the prescribed method. Mainly based on the American ASTM F1358-1995 “Standard Test Method for Flame Retardant Properties of Fabrics – Vertical Method” and China’s GB/T5456-2009 “Determination of Flame Spread Performance of Vertical Samples of Textile Combustion Properties” and GB 5455-1997 “Textile Combustion Performance Test Vertical Method” and other standards. Chinese national standards stipulate that the afterburning time is ≤5s, the smoldering time is ≤5s, and the damage length is ≤150mm. According to the relative position of the sample and the flame, it can be divided into vertical method, tilt method and horizontal method.
The horizontal method and the vertical method are the more commonly used methods for testing flame retardant materials. The principle is: clamp one end of the sample horizontally or vertically, apply a prescribed gas flame to the free end of the sample, and evaluate the sample by measuring the linear combustion speed (horizontal method) and the flame and flameless combustion time (vertical method) combustion performance. The vertical method experiment burns more violently than the 45° direction and the horizontal direction.
The vertical method is divided into vertical damage length method, vertical flame spread performance measurement method, vertical sample ignitability measurement method and surface burning performance measurement method . The vertical method can be used to determine the flame retardant properties of clothing fabrics, decorative fabrics, tents, etc.; the tilt method is suitable for aircraft interior decoration fabrics; the horizontal method is suitable for carpets and other matting fabrics.
The flame-retardant fabrics produced by City Textile are mainly used to make flame-retardant protective clothing. The detection method is mostly the vertical burning method. It meets many standards including European standard EN11611/EN11612/EN14116 and American standard NFPA2112.
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