What are the flammability test methods for flame retardant materials?

What is combustion test?

The combustion test is a test that evaluates the composition or combustibility of a specimen by burning. Many substances have a special flame colour when burning, and their combustibles have a specific odour, so the composition of the specimen can be determined by the state of the burning specimen, the flame colour, the odour and other signs. Certain flame-resistant rubber products, such as flame-resistant conveyor belts, are also subjected to combustion tests to determine their flame-resistant properties.

What are the methods of combustion test?

Commonly used combustion test methods include: contact flame Flammability test method, heating ignition test method and leakage test method.

What are the common types of combustion tests?

Combustion test is a lot of companies need to test the test, the flame retardant properties of the material is directly related to the safety of consumers, different countries and regions on the flame retardant properties of all types of products have clear regulations and inspection standards, then common combustion test test items are those?

Combustion safety testing

Polymer materials are widely used in ships, automobiles, rail transport, building materials and other fields because of their superior performance. As people pay more attention to the safety and comfort performance, it is more and more necessary to carry out combustion safety testing on polymer materials.

Flame Retardant Test 

Flame retardant test, that is, the test method to test the ability of the tested material to delay the continuation, spread, diffusion of flame. Flammability is the ability of a material or product to carry out flaming combustion under specified experimental conditions; non-flammability is the ability of a material not to carry out flaming combustion under specified experimental conditions; flame retardancy is the property of a material to slow down, terminate or prevent flaming combustion.

Fire Resistance Test 

Fire Resistance Test means the resistance of a test specimen to being baked and burned by fire, which is used to determine the resistance of a material to high temperatures. Fire Resistance Limit means the change in temperature of a test specimen according to a standard time-temperature curve, i.e., from the time it is subjected to the action of fire to the time when it loses its supporting capacity or integrity or loses its fire barrier.

Oxygen Index 

The minimum oxygen concentration, expressed as a volume fraction, which just maintains the combustion of a material in a mixture of nitrogen and oxygen at (23 s.2)°C under specified test conditions.

Vertical combustion test 

Vertical combustion test means that the specimen is supported vertically on a support, the lower end of the specimen is burned in the flame for a fixed period of time, and then the flame is removed, and then the combustion parameters, such as the time of flaming and flameless combustion of the specimen, are determined to determine the combustion performance level of the specimen.