A simple way to test the flame retardant properties of fabrics

1, match test method

Match test method can be assessed flame retardant fabric or relatively flame retardant properties. Take a test about 2.5cm * 30cm fabric, with a lit match on the bottom of the sample, burning to the match burn (or provisions 5-12S), observe the sample combustion or flame retardant effect. May require the burning time of the sample does not exceed 5 seconds as qualified, more than 15 seconds over the center line or smoldering time is unqualified. The law approaches vertical law.

2, lighter test method

The sample size according to the test needs to be selected, the heat source using lighters, the time is generally 5S. Place the heat source and application conditions are similar. After the fire is extinguished, observe the spread of the flame spread is not serious as qualified.

3, ethanol combustion test method

The heat source is 0.3mL of absolute ethanol, placed in a small beaker (cap can be), the test can be vertical, horizontal or 45 ° tilt method, the distance between the ethanol and the fabric, the determination of indicators can be determined according to requirements, such as carbon long, burning Area, smoldering time, continued burning time and the situation of combustible waste.

4, tablet test method

The test uses hexamethylenetetramine (HMTA) tablets (made with powder pressure), a mass of 150mg, a diameter of 6mm. If the conditions can be reused a square metal plate (230mmx230mm, the middle to open a 205mm diameter hole). The test will be placed in the center of the sample tablet (300mmx300mm), with light matches gently touch the tablet surface, observe the ignition of the flame burning until extinguished or flameless extended to the edge of the hole in the metal plate, as the end of the test. Measure the maximum distance between the center of the specimen and the edge of the damaged area with a ruler and record the time it takes for the tablet to ignite to the flame or flameless to the edge of the sheet metal. This method is suitable for laying textiles, such as carpet or combination of textile materials on the heat and flame reaction performance assessment, but also as a process test flame retardant effect observation and comparison of test conditions and selection.

5, hot metal nut method

A stainless steel hexagonal nut (30 ± 2g) was heated in an electric furnace to 950 ° C. The nut was removed with a crucible pliers and immediately placed in the center of the specimen (300mm * 300mm). After 30s of contact, the nut was removed. The time required to record the flare burning time, the smoldering time and the placement of the nut to the flashing point involved in the recording of the rib to the edge of the pressure ring was measured. The law applies to a variety of floor fabric testing.

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