PVC Resin Polymerization method
- Suspension Grade PVC
- Emulsion Grade PVC
- Bulk Polymerised PVC
- Copolymer PVC
1. Suspension Grade PVC
The most widely prevalent type, Suspension grade PVC is made by polymerizing droplets of Vinyl
Chloride monomer suspended in water. When Polymerisation is complete, the slurry is centrifuged
resin to heat degradation. Less porous types are extensively used for the high volume Rigid
types are used in Plasticised applications like Cables, Footwear, Soft Calendered Sheeting and
2.Emulsion Grade PVC
Emulsion Polymerised PVC is what Paste Grade Resin is and this is almost exclusively used for
Plastisols. Paste grade resin is a very fine particle size PVC produced by spray drying an
much more energy to produce and is considerably costlier than Suspension resin. Paste grade
specially formulated pastes are coated either on a suitable substrate (Direct Coating) or on
Release Paper (Transfer coating).
3. Bulk Polymerised PVC
Bulk Polymerisation gives the purest form of PVC resin as no emulsifying or suspending
available in the lower K value groups, as Unplasticised PVC Foils for Blister Packaging
grades. Refinements in Suspension resin technology has edged out Bulk PVC in the recent past.
Vinyl Chloride is copolymerized with comonomers like Vinyl acetate give a range of resins
with unique properties.