What are the common problems in the suspension production of PVC and how to solve them?
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What are the common problems in the suspension production of PVC and how to solve them? Thank you!!!
during production: The polymerization kettle is over-temperature and over-pressure, producing coarse material, high residue, drying material running out, etc.
To prevent over-temperature and over-pressure, be sure to drain the water from the coating kettle after discharging the materials, and also pay attention to the amount of initiator added.
What is the main reason for coarse powder? The powder produced by our company in recent times has been very coarse, with many large particles, and the average particle size is not much different from before. Around 130 microns. 250 microns often exceed 1%.
Check the dispersant. Generally, dispersants have a greater impact on particle size.
Regarding the situation of coarse materials, there is information on the forum http://bbs.hcbbs.com/thread-397648-1-3.html
There are many common problems in producing PVC by suspension method, including index problems.: The monomer moisture exceeds the standard, has high impurities, and has many fish eyes. ； Overtemperature and overpressure of the polymerization kettle in summer and antifreeze issues in winter ； Spray valves, manholes, discharge valves, pipe leaks, instrument problems!