[Occupational toxicology and safety technology risk assessment in pyrolysis gases of plastics].

The evaluation of occupational and safety risk by thermal decomposition products of plastics can be obtained not theoretically, but principally only by practice-related experiments due to influence of a lot of external conditions. We present a 200 l-experimental chamber, in which we can expose original samples up to 8 X 8 cm at temperatures up to 1000 degrees C. It is possible to evaluate the risk by extrapolation of values from the experiments, obtained by discontinuous or automatic chemical analyses, to the plants data and comparison with MAC's and other safety values. The kind of appreciation is illustrated by an example, the thermal processing of 80 kg polyethylene in a industrial hall of 11500 m3.