Operation steps of 45 degree automatic combustion Tester

The 45-degree automatic flammability Tester is mainly used for tent fabrics of clothing fabrics, such as decorative fabrics. The flame retardant performance measurement of decorative fabrics is composed of a control system and a combustion chamber. The sample is installed on the sample holder of the combustion chamber with an inclination angle of 45°. Close on the sample, return to the flame according to the specified time, observe the combustion conditions of the sample and the spread speed of the flame on the sample, and evaluate the ignition and flame spread performance of the sample.

Test Principle

1. Burning intensity and speed test

Under the specified conditions, the sample is placed at an angle of 45 degrees, the sample is ignited for 1 second, and the time required for the sample to burn upward in the flame for a certain distance is used as a measure for evaluating the strength of the textile. combustion. Fabrics with surface relief are used as an additional indicator of burning intensity.

2. Damage area and length test

Under the specified test conditions, the textile sample is ignited in a direction of 45 degrees, and the smoldering time after burning, smoldering time, damaged area and damaged length of the fabric are measured.

3. Number of contacts and flame test

Under the specified test conditions, the textile sample is ignited in a direction of 45 degrees, and the number of times of contact with the flame is measured when the fabric is burned 90mm from the lower end of the sample.

operating procedures

1. Remove the installed sample holder from the dryer, put it on the sample holder of the testing instrument, make the marking line pass through the guide wire hook of the sample holder plate, and then hang the hammer just above the marking line on the guide wire ring Pull down to make it taut.

2. Close the door test Set the timer to zero, press the start button, the timer starts counting, when the flame burns above the sample mark, the flame is in contact with the sample surface for 1s, the wire is burnt due to the weight falling, the timer Stop timing and accurately record the burning time of the specimen displayed in the chronograph to light the desiccator for no more than 45 s.

3. During the test, the burning condition of the sample should be observed. If combustion is incomplete, the back of the sample should be observed for signs of carbonization or melting.