Mask flame retardancy test is an important test to measure whether the mask can extinguish the flame or limit the spread of flame within a short period of time when it encounters an ignition source to protect the user's safety. The following are the main steps of a general flame resistance test:
1. Preparation:
a. Ensure that the experimental environment is safe. In order to prevent possible fire, the experimental site should be equipped with appropriate fire extinguishing equipment, and to ensure that there is no combustible material around.
b. Prepare an appropriate amount of mask samples for subsequent testing.
2. Equipment preparation:
Flame retardant testing requires the testing of an ignition source, and it is usually necessary to achieve accurate control of the size, shape and burning characteristics of the ignition source. There are special combustion test chamber can be used for such tests, if not, you can also make their own, the basic need is to be able to fidelity samples in a vertical state and the source of ignition from the lower part of the upward combustion.
3. Test Procedure:
a. Place a sample of the mask on the test stand. Always make sure that the mask is in a vertical position and that the end is in contact with the ignition source. b. Next, light the ignition source.
b. Next, light the ignition source and bring it into contact with the bottom of the mask sample. The sample is usually allowed to burn on the ignition source for a certain amount of time (e.g., 3 or 5 seconds).
c. Remove the ignition source and record how long the mask sample continues to burn. If the mask sample flame goes out, record this time. If it continues to burn, record the time the flame travels from the bottom to the top.
4. Analysis of results:
Depending on how long the sample burns and how quickly the flame spreads, the flame retardant properties can be assessed. Requirements usually depend on specific standards or specifications. In general, a mask sample is considered to have good flame retardant properties if it is able to extinguish itself after burning for a period of time and if the flame spreads slowly.
It should be noted that as it involves an ignition source and combustible materials, the flame retardancy test needs to be carried out in a specialised environment, and needs to be monitored and operated by professional personnel. Attention should also be paid to the handling of the mask samples after the test to prevent possible safety problems caused by embers from the ignition source. Of course, the specific steps and requirements for actual flame retardant testing may vary and need to be determined based on the specific requirements, objectives and facilities available.