In one study recycled PET fibers offered important environmental benefits over virgin PET fiber.

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Notes:

Depending on the allocation methods applied for open-loop-recycling, NREU (non-renewable energy use) savings of 40–85% and GWP (global warming potential) savings of 25–75% could be achieved.

Primary Source:

2010 - https://www.researchgate.net/publication/223174389_Open-loop_recycling_A_LCA_case_study_of_PET_bottle-to-fibre_recycling

Secondary Source:

https://www.vogue.co.uk/news/article/fashion-pact-kering-chanel-prada-gucci

Fiber, PolyesterMaxine BedatGoldComment