How physiologically harmful are these thermoplastics?

Polypropylen Polyethylen polyamide Polycarbonat Acrylonitrile Butadiene Styrene Polymethyl methacrylate Polystyrene Polyoxymethylene I'm interested in plastics and would like to expand my knowledge. Since I work as a molder, or rather, a "process mechanic for plastics and rubber technology specializing in molded parts," my question mainly relates to the thermoplastic form of the plastic. (I wouldn't…