There are hundreds of different types of plastics you can cut and engrave for a extraordinary amount of applications.
Generally speaking there are two different forms of plastics; thermosetting plastics that cure and set when heated and thermo softening plastics which melt when heated but can also be re-formed. Thermo softening plastics laser cut much more cleanly in most cases with a slightly polished edge. The only plastic we can’t cut is Polyvinyl Chloride (PVC) as the fumes aren’t very nice for humans or the machines!