20 billion pairs of shoes are produced annually, and up to now 95% of these end up in landfill. However research at Loughborough University’s Innovative Manufacturing and Construction Research Centre (IMCRC) has lead to the development of a recycling process for footware. Basically different types of shoe are separated. They are then granulated into 3 or 4 mm fragments, which can then be sorted into four separate waste streams using blown air and vibrating air tables.
Source: The Manufacturer