GREENMAX polystyrene densifier Mars series adopt hot-melt technology. The small polystyrene pieces cut by the crusher will then be heated to 190 degrees Fahrenheit which turns the polystyrene into a soft pliable material that can be densified into a denser form at a ratio of 90:1. INTCO Recycling Supply polystyrene densifier M-C200 for polystyrene recycling and Buy Back polystyrene Foam Blocks. Throughput 200kg/h Production Capacity: 440lbs/h Compression Ratio: 90:1 Compressed Density: 600-800kg/m3 Motor Power: 37.5kw