Why is Polypropylene (PP) So Difficult to Recycle?
Despite the diverse applications and demand for PP, its recycling rate is incredibly low.
Polypropylene (PP) is one of the most common plastic types in the world. In the U.S., PP plastic is marked with the number 5 plastic resin identification code on the bottom of packaging. It is the second most manufactured plastic after polyethylene, composing around 17% of annual global plastic production. As a food-safe plastic with high flexibility and puncture resistance, PP has extensive applications in snack and medication packaging as well as manufacturing.
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