Characterization of Post-Consumer PET after Removal of the Original Surface: Influence of Raw Material

Mancini, Sandro Donnini; Nogueira, Alex Rodrigues; Schwartzman, Jonas Age Saide; Kagohara, Dennis Akira

doi:10.1080/00914030903538538

Cited by 1 publication

(1 citation statement)

References 10 publications

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“…The bottle-to-bottle recycling process of PET must successfully reduce the concentrations of chemical compounds sorbed previously by the bottles in their first use [20]; however, the process of conventional washing in water of PET bottles is not capable of removing all the impurities from soft drink bottles and edible oil bottles [46]. According to literature, the main chemical compounds linked to recycled PET are limonene; aliphatic aldehydes; benzaldehyde; carboxylic acids (C8-C15); p-xylene; isopropyltoluene; cyclohexyl toluene; alkanes; plasticizers such as dibutyl phthalate(DBP), di(2-ethylhexyl)-adipate (DEHA), dioctyl phthalate (DOP), and diisononylphthalate (DINP); benzophenone; and alcohol groups (C12-C18) [17,19].…”

Section: Pet Recycling Indicatorsmentioning

confidence: 99%

Identification of Potential Migrants in Polyethylene Terephthalate Samples of Ecuadorian Market

2021

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Polyethylene terephthalate (PET) is the plastic packaging material most widely used to produce bottles intended for contact with food and beverages. However, PET is not inert, and therefore, some chemical compounds present in PET could migrate to food or beverages in contact, leading to safety issues. To evaluate the safety of PET samples, the identification of potential migrants is required. In this work, eight PET samples obtained from the Ecuadorian market at different phases of processing were studied using a well-known methodology based on a solvent extraction followed by gas chromatography–mass spectrometry analysis and overall migration test. Several chemical compounds were identified and categorized as lubricants (carboxylic acids with chain length of C12 to C18), plasticizers (triethyl phosphate, diethyl phthalate), thermal degradation products (p-xylene, benzaldehyde, benzoic acid), antioxidant degradation products (from Irgafos 168 and Irganox), and recycling indicator compounds (limonene, benzophenone, alkanes, and aldehydes). Additionally, overall migration experiments were performed in PET bottles, resulting in values lower than the overall migration limit (10 mg/dm2); however, the presence of some compounds identified in the samples could be related to contamination during manufacturing or to the use of recycled PET-contaminated flakes. In this context, the results obtained in this study could be of great significance to the safety evaluation of PET samples in Ecuador and would allow analyzing the PET recycling processes and avoiding contamination by PET flakes from nonfood containers.

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