A small amount of monomer is recovered and recycled. A granular product is obtained by centrifuging and drying. While a range of products can be made by the first two methods as above, they are generally limited to speciality products which are difficult to impossible to make by the suspension process. The largest proportion of PVC is produced, particularly in the USA, by the suspension process because it requires the least capital investment and has the lowest operation cost. Acrylic-PVC alloy with high impact strength available.
Limitations are recovery from bending or stretching damped compared to rubber.
Limitation is that adhesion to many substrates limited in the absence of a primer. Dimensional stability at room temperature for rigid formulations. Almost unlimited range of colors- transparent to opaque according to formulation. Limitation is the high specific gravity for polymeric material. Limitations are that flexible grades are most susceptible to staining, chemical and microbiological attack due to presence of plasticisers.