45 Degree Flammability Tester TF310

Test principle

Under the specified conditions, the flame spread time required to burn to the mark line flame by ignition for 1 second on the surface of a sample placed at 45 degrees.

Test method

By placing the specimen at an angle of 45° (the length of the specimen is at an angle of 45° to the horizontal) and igniting the specimen with the combustion source on the upper or lower surface below the specimen, one can measure the time required to measure the specimen burning upwards for a certain distance. Besides, this testing method can also measure the renewal of the specimen burning, flame retardant time, flame spread rate, charring length, and charring area. In addition, this can also measure the number of times the specimen needs to be exposed to the flame after burning up to a certain distance from the lower end of the specimen The number of times it takes to contact the flame at a certain distance from the bottom end of the specimen, and other indications relating to the flame retardant properties.

Test procedure

1 Take out a specimen clip from the dryer which has been loaded with specimens, place it on the specimen rack in the tester, then put the marker line through the wire guide hook of the specimen rack flat, then hang a heavy hammer on the marker line just below the wire guide ring to make it taut.

2 Close the test chamber door. Set the timer to zero point, press the start button, the timer starts to record the time, so that the flame and the sample surface contact 1 s. When the flame burns to the mark line hanging on the upper part of the sample, the hammer is burned off and falls because of the line, the timer stops timing, and accurately record the burning time shown in the timer.

Note: The time between taking the specimen out of the desiccator and igniting it should not exceed 45 s.

3 The test should be observed in the burning condition of the specimen. If the combustion is incomplete, the back of the specimen should be observed for signs of charring or melting.

4 After sufficient smoke emission, open the door of the combustion box to remove the sample clip, clear the sample residue, and do other work, according to the standard requirements of good records.

Contents of Test Report

1 A description of the report: which international standard it conforms to and some changes to it.

2 Date of the test

3 How the test sample was handled.

4 Ambient conditions: temperature, relative humidity, and atmospheric pressure.

5 The gas used to ignite the test sample.

6 The composition of the fabric.

7 The standard of the burning head used to ignite the sample.

8 The set ignition time

Maintenance

1 The nozzle should not be subjected to heavy impacts or strong bending to avoid damage to the nozzle.

2 When using the weighted stop switch, the weight should not be suspended too high to protect the stop switch.

3 Take care to clean the test chamber of any burning residue, as well as any traces of burning in the specimen holder and on the inner wall.

4 The air tightness of the gas circuit should be checked from time to time. Air leaks in the gas circuit can affect the test and can cause accidents.

5 The instrument is made of metal and is susceptible to rust over a long period of time. Keep the test environment dry and carry out regular anti-rust treatments.

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