Page 189 - Materials Chemistry, Second Edition

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Sustainable Industrial Design and Waste Management
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The sizes of shredded plastics are from 5 to 10 mm. The motor that
drives the shredder is approximately 30 hp and the shredded plastics are col-
lected in bags to be further reprocessed or sold. Figure 5.13 shows a horizon-
tal axis shredder used for rigid plastics waste. The end products of shredding
are irregularly shaped pieces of plastic depending on the required final prod-
uct and the type of industry that will use them. The shredded plastics could
undergo further washing to ensure cleanliness, especially as the shredded
pieces are more easily cleaned when they are in small sizes than in large
ones (Lardinos and van de Klundert, 1995).

1 2 3 4 5 6 7

PETE HDPE PVC LDPE PP PS OTHER
FIGURE 5.12 Plastic coding system

FIGURE 5.13 Horizontal axis shredder