PVC itself is not particularly dangerous or toxic.
PVC Polyvinyl Chloride Powder
Like parlon and saran, PVC is a polymeric chlorine donor and fuel. It can be used in the form of a fine powder or as a solution in tetrahydrofuran (THF). It is sometimes used as a binder, but it is very brittle. Small amounts of plasticiser (dioctyl phthalate is common) may be added to improve the mechanical properties.