What does plasticizer flash point mean? What is the test method?
The production of plastic products can not be separated from the use of plasticizers, different plasticizers in the selection, reference to the performance and parameters are not the same, which more manufacturers will refer to a value is the flash point. The flash point of the high and low directly affects the application of plasticizers, that plasticizer flash point is what it means? How to test the flash point of plasticizer?
First, what is the meaning of plasticizer flash point
1, the flash point of plasticizer
Flash point, also known as flash point, is one of the important indicators of flammable liquids, plasticizers as a liquid molecular material, also has a flash point. Plasticizer flash point temperature is lower than the ignition point, is a liquid plasticizer on the surface of the mixture of vapors and air in contact with the fire and the first occurrence of blue flame flash temperature. The flash point of plasticizer with the same ignition point, indicating the size of the possibility of explosion or fire, the transportation, storage and use of safety has a great relationship.
2, the impact of plasticizer flash point
Plasticizer flash point and volatility, processing temperature and other related, in the plasticizer selection, the flash point can be used as a reference for some other indicators.
(1) The relationship between flash point and volatility: the same as the boiling point of the plasticizer, the lower the flash point, indicating that the greater the volatility of the plasticizer.
(2) The relationship between flash point and processing temperature: the lower the flash point, indicating that the plasticizer combustible conditions are more relaxed, so when processing, need to pay special attention to the processing temperature is more than the flash point of the plasticizer, otherwise the possibility of danger increases.
General-purpose PVC environmental plasticizer
Second, the plasticizer flash point detection method
Plasticizer flash point detection method is to fill the plasticizer sample in the test cup to the specified liquid surface line, the beginning of a faster increase in specimen temperature, and then slowly at a steady rate to close to the flash point, and from time to time in the specified temperature to test the small flame swept over the surface of the liquid in the cup over the surface of the liquid due to the flame and the cause of the liquid surface of the vapors on the flash of fire when the temperature limit, that is, for the flash point of plasticizers. Specific steps are as follows:
1, before the test will be opened to the exhaust fan.
2, the sample will be loaded into the measuring cup, so that the plasticizer liquid surface and the wall of the cup engraved line level, too much pipette sucked out, such as stained outside the cup, need to be poured out and washed and dried after reloading the specimen as required.
3、Place the test measuring cup on the instrument heating table.
4、Insert the fixed sensor and thermometer into the measuring cup so that it is 6ml from the bottom of the cup.
5、Heat the measuring cup, when the temperature reaches the expected flash point, light the igniter and adjust the flame diameter to about 4ml.
6, when close to the flash point of plasticizer, constant speed temperature rise, so that the sample surface of the vapor flash fire, when the specimen on the liquid surface of the beginning of the instantaneous extinction of the blue flame, record the temperature, as a plasticizer specimen flash point.
7, the end of the test to close the igniter in time, the sensor and thermometer up, the test cup removed from the instrument heating platform, and then turn off the gas source power switch.
8, to be cooled in the cup sample, pour it into the waste liquid recycling bucket, and timely cleaning and drying of the measuring cup, in order to test again.
P-phenyl environmental plasticizers
Third, the flash point of plasticizer test notes
1, the test should be selected to avoid the wind and light place, the operator shall not leave in the middle.
2, the end of the test, make a good job of cleaning, and should cut off the power supply and gas source.
3, in order to ensure the accuracy of the test data, open measuring cups should be cleaned and dried in a timely manner.
4, the test must have safety measures to prevent burns, fire and other accidents.
What is the meaning of the flash point of plasticizer, the above is the flash point definition and detection methods for you to organize, I hope to help you. It is not difficult to see that the flash point of the plasticizer directly affects the temperature of the plasticizer environment, so in the selection, you need to pay more attention to the flash point, to avoid danger due to the high temperature of the product processing.
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