Determining the flame retardant properties of flame retardant fabrics is an extremely complex process because there are many factors that affect the combustion of flame retardant fabrics and are related to each other. Even if the same textiles behave differently in a fire, the measured flame retardant properties of the flame retardant fabrics will vary. Usually, these factors are: the form of the ignition source, the time of application of the fire source, the location of the flame retardant fabric and the source of the fire. Different test methods will have different test results. At present, the horizontal combustion method, the 45 ° C combustion method and the vertical combustion method are the most used. When measuring the flame retardant properties of flame retardant fabrics, it is necessary to specify the test methods and test conditions used. The horizontal combustion method is the least stringent test method.
In the same finishing process, when tested by the 45 °C burning method, if the flame can not burn the flame retardant fabric in the middle, the fire of the cloth surface will increase and spread to the surrounding, and the obtained flame retardant effect is poor; During the test, if the flame retardant fabric can form an expanded carbon residue during combustion, it is advantageous to prevent the flame from spreading upward, and the obtained flame retardant effect is better.
For the flame retardant performance of the flame retardant fabric to be measured by the 45 ° C combustion method, it is recommended to use a fusible drop type flame retardant, which is beneficial for the flame retardant fabric to be burned through in a relatively short time; When determining the flame retardant properties of flame retardant fabrics, it is recommended to use a carbon-forming flame retardant, which is beneficial to the flame retardant fabric to form a network-like incombustible carbon layer in a relatively short period of time, thereby preventing combustion.
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