Interpretation of the flame retardant test process of masks1

Test standard This medical mask flame retardant performance tester meets but is not limited to the following standards: GB 19083-2010 Technical Requirements for Medical Protective Masks; YY 0469-2011 Medical Surgical Masks. GB 2626-2006 'Respiratory protective equipment self-priming filter type anti-particulate respirator' test principle 1. Use a standard energy heat source to test the mask to observe the combustion behavior of the mask. The energy of the fire source is guaranteed by measuring the height and temperature of the flame. 2. The time for masks or other samples to pass through the fire source is specified by the standard, and the action time of the fire source is guaranteed by controlling the moving speed of the mask. 3. The combustion behavior of the sample is measured by the flaming and flameless combustion of the sample. Plug in the power socket of the back cover of the instrument to connect the power supply, connect the air inlet to the propane bottle, and open the valve of the gas bottle to connect to the gas source. Close the front door of the combustion test chamber and place the“power supply”switch on“open”position, the power indicator lights up. First, put the nose tip of the metal head mold down, put the mask on the metal head mold, and move the head mold slightly with your hands. When the nose tip of the head mold is just above the igniter, adjust the height of the igniter head (rotate clockwise). Lower the igniter head, turn the igniter head counterclockwise to raise) so that the distance between the top of the igniter and the nose tip of the head mold is 20±2mm push“igniter return”Press the button to return the burner to the ignition position. press“head mold return”button to return the headform to its starting position. press“clear”key, the instrument will return to the initial state. keep pressing“ignition”button to adjust the propane medium pressure valve“pressure regulation”Knob (as indicated on the end of the knob“+”direction rotation is increasing,“-”Rotate the direction to decrease), so that the pointer of the pressure gauge on the top of the instrument box points to 20kPa. At this time, the ignition resistance wire has turned red, and then loosen it after the igniter is ignited.“ignition”button. When ignition is difficult, please adjust“flame adjustment”Button, clockwise to reduce the flow of combustible gas, counterclockwise to increase the flow of combustible gas. If the ignition fails for some reason, in order to prevent the explosion caused by the continuous introduction of gas, press“Afterburning stops”Breathe out, then press“clear”Restore the original state. Open the front door of the combustion test box, place the flame height gauge (40mm high) directly in front of the flame by hand, and turn the“flame adjustment”Knob, adjust flame height to 40mm±2mm, after the flame is stable, remove the flame height gauge, and observe the“temperature display”Is it stable at 800±50 ℃, if it is insufficient, it can be adjusted by increasing the inlet pressure of the gas cylinder pressure reducing valve to stabilize the flame temperature at 800±50°C. according to“igniter starts”button, move the igniter to the ignition position, press“Head form starts”button, the head mold starts to rotate, after the head mold rotates in place, the igniter stops gas and resets,“Afterburning time”Automatic timing; after the continuous combustion is over, press“Afterburning stops”key; if there is no continuous combustion, press directly“Afterburning stops”key, wait until the smoldering is over, then press“smoldering stop”key, and record the afterburning time and smoldering time. press“head mold return”Press the button to restore the head mold to the starting position, open the front door of the combustion test chamber and remove the sample, and the test is over. press“clear”Press the key, the instrument returns to the initial state, and the next mask sample is put on the metal head mold. At this time, the next test can be carried out according to the steps 6-11. If the next test is not required, please turn off the power, unplug the power plug, take out the residue container, and clean up the burning residue. To test the flame retardancy of the mask strap, you must put the mask on the metal head mold and release it.“Head mold set screw”, rotate the head mold so that the mask belt is downward. press“Head form starts”button, the head mold starts to rotate, when the head mold is just above the igniter, press“smoldering stop”Press the button to stop the rotation of the head mold, and adjust the height of the igniter head so that the distance between the top of the igniter and the lowest part of the head mold is 20±2mm is tested according to the steps of 6-11. During the material test, the injection molding method, the compression molding method or the compression molding method is used to make the required shape. If the above method is not feasible, test specimens shall be cut from a representative sample of the material. After the production is complete, use fine sandpaper to smooth the cut surfaces of the incision, and carefully remove all dust and particles from the surface. The sample size should be at least 60mm long and 60mm wide (inside the fixture). The first thickness value includes: 0.1mm±0.02mm, 0.2mm±0.02mm, 0.4mm±0.05mm, 0.75mm±0.10mm, 1.5mm±0.15mm, 3.0mm±0. 2mm or 6.0mm±0.4mm. When testing the finished product, if possible, the sample should be a complete finished product; if the test cannot be carried out on the complete finished product, you can: a) cut a piece from the part to be inspected; b) cut a small piece on the complete finished product holes to make contact with the glow wire; c) remove the parts to be inspected from the complete finished product and conduct individual tests. Precautions for test operation The flame retardant tester for flammable performance masks is a special test instrument used to test the flame retardant performance of masks and masks. The specific operation steps are as follows: 1. Turn on the power supply and air source behind the box; the technical service department of Beijing Xinsheng Zhuorui Technology Co., Ltd. supplies the mask flame retardant instrument 2. Turn on the power and push the open switch on the front panel upwards ;

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