The IAAC also employed some unusual materials in the study, including orange peel, coffee powder and shrimp shells. There was a method to this and the material used has a genuine effect on the final plastic. The orange peel infused plastic was stronger, with better heat resistance, while the material containing coffee grounds displayed hydrophobic qualities.
The IAAC concluded that a combination of coffee and orange would make the best bioplastic and the geometry of the structure could then be varied to produce differing behaviour. Not every country has an excess of coffee and orange, but the study notes that each individual country can find their own combinations of food waste and plastic.
The amount of waste can also affect the level of shrinkage and bend over time in the plastic, which can be tuned for the individual purpose.
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