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Ink Removal on Plastic Films Printed by Flexography

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Resumo(s)

Plastics are key engineering materials for our society and economy, mainly due to their multifunctionality and ease of processing. Nonetheless, their main drawback is related to the fact that when these cannot be reprocessed, they do generate waste, which leads to several environmental impacts. Therefore, considering plastics’ circularity, minimizing their waste, and the resulting impacts, stresses the need for these to be recyclable. One of the main challenges that concern their recyclability is the deinking of plastic films when printed by flexography. The current technology uses non-bio-based surfactants and non-renewable surfactants, which are harmful to the environment. Therefore, the main objective of current research is to develop an environmentally sustainable process for ink removal on printed post-industrial flexible plastic films using bio-based surfactants. This process focuses on obtaining a deinked plastic that may be reprinted, avoiding this way for inappropriate disposal or reprocessing problems. The value increase of upcycling such post-industrial waste makes it possible to match the quality of the virgin plastic, which is key to carrying out an effective cost analysis of recycled plastic when compared to the new plastic films. Dedicated laboratory deinking procedures were undertaken with transparent polyethylene films printed by flexography with different conditions. Preliminary results show the dedicated experimental ink removal procedure using bio-based surfactants to be effective and environmentally sustainable.

Descrição

Conference name 2nd International Conference on Water Energy Food and Sustainability, ICoWEFS 2022, Portalegre, Portugal.
Conference date 10 May - 12 May 2022.
Proceedings of the 2nd International Conference on Water Energy Food and Sustainability (ICoWEFS 2022). Portalegre, Portugal | 10-12 May 2022.
Included in the following conference series: International Conference on Water Energy Food and Sustainability

Palavras-chave

Plastic film recycling Biobased surfactants Deinking Solvent-based ink Cationic surfactant

Contexto Educativo

Citação

Bozzola, F. et al. (2023). Ink Removal on Plastic Films Printed by Flexography. In: Duque de Brito, P.S., et al. Proceedings of the 2nd International Conference on Water Energy Food and Sustainability (ICoWEFS 2022). ICoWEFS 2022. Springer, Cham. https://doi.org/10.1007/978-3-031-26849-6_25

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