Processing
There are two Nike Grind processing plants, one located in the United States and the other in Belgium. The American facility uses a "slice and grind" technique, where each shoe is cut into three slices that contain the main materials. These slices are fed through grinders and purified to become the different types of material. The Belgian facility grinds the shoes whole, and passes the resulting material through a series of separators for the same three groups of material.
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