Mechanical recycling of polyamides in multilayer film structures
Polyamides in multilayer films are currently classified as non-recyclable.
Institute cyclos-HTP GmbH has completed the series of tests commissioned by BASF SE to reassess the recyclability of polyamide 6 (PA6) in coextruded polyethylene (PE) / PA6-multilayer film structures in post-consumer packaging waste. The main result: Multilayer films based on PE/PA6 are certified to be recycling compatible for the PE film stream. This was analyzed for PA6 concentrations of up to 30 percent in original packaging films. This result is intended to form the basis for a review of the classification of PA6 in the “Minimum standard for determining the recyclability of packaging subject to system participation pursuant to section 21 (3) VerpackG (Verpackungsgesetz – German Packaging Act)” of the Stiftung Zentrale Stelle Verpackungsregister (Central Agency Packaging Register).
“Film-to-film” approach for PE/PA waste blends is a real recycling option including manufacturing of “new” monolayer films: