Guidance: Filtration in PVC plastic manufacturing is mainly VCM (vinyl chloride) monomer feed filtration, unreacted monomer recycle filtration, and vinyl acetate monomer filtration.
VCM (vinyl chloride) monomer feed filtration
It is important that VCM monomer raw materials do not contain visible colloids and impurities; these impurities can cause fish eye effects or insulation failures, while high-end, high-price applications do not allow the use of unqualified PVC. The filtering effect of VCM directly affects the quality of PVC.
Unreacted monomer circulation filtration
The monomers that are not involved in the reaction (mainly vinyl chloride) will be recovered by the condenser. The recycling process will generate foam on the upper part of the reactor. The foam carrying PVC particles will block the condenser and cause production failure. The filter is used to protect the condenser.
Vinyl acetate monomer filtration
Vinyl acetate monomers are sometimes used to reduce crystallization while allowing the final product to react at a lower temperature. VAc is normally used in a ratio of 9 to 15% by weight. When VAc is pumped into the reactor, it is also required for quality assurance. Add filter, usually 5 micron absolute precision filter
Filtration system benefits
1. Ensure continuous production of high quality PVC;
2. Increase income;
3. The maximum guaranteed production capacity;
4. Minimum downtime.
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