shredder, it is recommended to use an agglomerator that cuts, preheats, and dries the plastics into granules. The agglomerator will increase the material's density and quality which will ensure a continuous flow in the extruder and hence better efficiency. It is better to clean the plastics before agglomeration since foreign substances will be processed together with the plastics. In the process of agglomeration, heat is added indirectly through friction between plastic film and the rotating blade located at the bottom of the agglomerator. It is therefore important to rapidly cool the plastic film to obtain the crumb shape desired. This is achieved through adding a small cup of water. An example of an agglomerator is given in Figure 5.14.