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Compaction of waste - how does it actually work?

Glossary

Compaction of waste and recyclables has numerous advantages. Thus, it not only eliminates space problems, but also helps to save a lot of money. Depending on the selected press and the corresponding degree of compaction, the volume of the material can be reduced by up to 95 percent. This makes storage and transport easier than ever – and in most cases profitable!

The challenges of compacting different types of materials

The process of compaction is basically always the same: the material is placed in a compaction chamber. In this is a press shield or punch, which compresses the mass with great force. Cavities are closed, air escapes until maximum compression is achieved. Depending on the material, a certain amount of re-expansion occurs after compaction. This is relatively low for cardboard and paper, but very high for film. If this is not counteracted, it unfolds back to its original volume in a very short time. This can be prevented by special constructions. For example, Strautmann carries reinforced presses with material hold-downs especially for film. These ensure a consistently high bale density even with difficult material.

Bales or rather briquettes?

For cardboard and film, balers are the first choice. They compress the material up to 90 percent and are available in different sizes. Compact variants are also available. These are suitable for compaction even in small areas. Those who also want to form PET bottles, foam, electronic scrap, or cans into compact bales need a more powerful variant. With a pressing force of 70 tons, Strautmann offers the PP 1208 and PP 1208 Plus 70 balers for this purpose. Briquette presses have even more power. They are designed for the compaction of loose PET bottles, beverage cans, soft packaging, and Styrofoam, which are pressed into highly compacted briquettes in the machine. A volume reduction of up to 95 percent is possible. But regardless of whether the recyclables are compacted into bales or briquettes: The handy format makes the purchase extremely attractive for recyclers and disposal service providers.