How about the flame retardant performance of flame retardant protective clothing, the most important thing is the choice of fabrics, what are the simple test methods for flame retardant fabrics, you know? The following small series will give you a detailed introduction:

1. Match test method

The match test method can assess the flame retardant effect of the fabric or relatively relatively flame retardant properties. At the time of the test, take about 2.5cm × 30cm fabric, use the ignited match, put it under the strip sample, burn it until the match is burned, observe the situation or flame retardant effect. Sometimes it can be stipulated that the sample burning is not more than 5S is acceptable, and the over-line or smoldering exceeding 15S is unqualified.

2. Lighter test method

The sample size can be determined according to the test, and the heat source is a lighter, and the time is generally 5S. The heat source placement area can be similar to the application conditions. After the fire is extinguished, observe the spread of the flame, and the spread is not serious and it is qualified.

3. Ethanol combustion test method

The heat source is 0.3mL absolute ethanol, which is placed in a small combustion cup (the bottle cap is also available). The test can be performed by vertical method, horizontal method or 45 degree tilt method, ethanol and fabric distance is 2.5cm, and the measurement index can be determined according to requirements, such as charcoal. Length, burning area, afterburning time, smoldering time, and scumming conditions.

4. Tablet test method

The test was carried out using a hexamethylenetetramine tablet (pressurized with a powder) having a mass of 150 mg and a diameter of 6 mm. During the test, the tablets were placed in the center of the sample, and the ignited matches were gently contacted on the surface of the tablets, and the ignited flame was burned until extinction or flameless combustion was extended to the edge of the hole in the metal plate as the test end point. Use the ruler to measure the maximum distance between the center of the sample and the edge of the damaged area, and record the time when the tablet is ignited to flame or flameless combustion to the edge of the metal sheet.

5. Hot metal nut method

Heat a stainless steel hex nut (30 ± 2g) to 950 ° C in an electric furnace, remove the nut with a crucible pliers, immediately place it in the center of the sample, and take out the nut after 30S. The time required for the flaming burn time, the smoldering time, and the recording screw involved in the action of the nut to the ignition point to the edge of the pressure ring is measured. This method is applicable to a variety of floor covering fabric tests.