Plastic is a relatively stable substance. Direct crushing will not produce sticky substances due to reactions with certain molecules in the air. However, crushing plastic is mechanical crushing. Such friction, cutting, and impact Beating and squeezing may generate heat, causing small plastic particles to melt or stick to the inner wall, roller, reamer and other surfaces they contact. If it is only broken into pellets, the above phenomenon will generally not occur unless the plastic itself is not clean and there are glue, dirt, trademark stickers, etc. attached to the surface. These things will form sticky things, but they have nothing to do with the plastic itself. When plastic is broken, it will produce dust pollution due to dust, soil, etc. attached to the surface, and may also produce odor due to the liquid or other substances it has been in contact with. It is recommended that on-site operators wear activated carbon dust masks or lightweight ones with additional filter cotton. Gas half mask and protective glasses.