The recycling of polyurethane foam (PUF) waste has been the subject of a fairly large number of studies (refs. 1 and 2). These deal chiefly with the processing of industrial PUF waste and its use as initial feedstock for the production of polyurethanes and polyurethane foams. At the same time, a significant proportion of spent waste is sent to dumps or to recycling sites. Since the ageing and recycling of PUF waste under these conditions have been little studied, the task of the present work was to investigate the properties of flexible PUFs when exposed to the conditions of a waste recycling site.

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