Scientists assessed polyethylene terephthalate (PET) trays with different amounts of recycled content and produced by two different extrusion processes; find cyclic oligomer migration increases with recycled content amount, differs between the two processes; nontargeted screening identifies intentional and non-intentional substances, including marker compounds for recycled PET
September 21, 2023
More research on oligomers needed, scientists say
Perspective article emphasizes that the “invisible” part of polymers, the oligomers, have been overlooked with the focus being on the “visible” part, the microplastics; urgency to increase knowledge on oligomer properties, environmental behavior, and toxicity given their ever-increasing diversity, quantity, and potential toxicity
August 10, 2023
Oligomer migration from PET and Tritan™
Scientists find cyclic polyethylene terephthalate (PET) oligomers migrate into fatty food simulants but not olive oil; levels higher from recycled compared to virgin PET; comprehensive extraction and migration experiments of Tritan™ products find oligomer migration from bottles of no toxicological concern but microwaveable containers were non-suitable for food heating
May 24, 2023
Study reveals knowledge gaps on PET oligomers migrating from FCMs
Scientists investigate available research on hazard and exposure of 34 oligomers in PET for food contact; 74% of them found to migrate; only 38% have been tested for their safety using computer models, while only one was tested for safety in organisms; authors call for further research and better risk assessment
February 10, 2023
Oligomers – presence in FCMs and food, toxicity, challenges
Review summarizes analysis and presence of oligomers in food contact materials (FCMs) made of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polystyrene (PS) including challenges; study suggests ionic strength may influence migration of polyamide (PA) oligomers from PA FCMs
July 19, 2022
Oligomers from plastic FCMs reviewed
The diversity of oligomeric migrants increases with new (co)monomer varieties used in plastic production; quantitative analysis and toxicological evaluation are challenging
February 8, 2022
Scientists propose and apply NIAS identification approaches
Review provides guidance to select analytical technique for non-intentionally added substances (NIAS) identification and quantification in food contact materials (FCMs); scientific studies analyze NIAS migrating from FCMs; develop model to predict collision cross-section values to identify NIAS in FCMs; detect polyethylene terephthalate (PET) oligomers in post-mortem blood samples
November 10, 2021
Two articles review oligomers and other chemicals migrating from bio-based products
Research study compares different techniques for oligomer detection and finds polyester oligomers migrate from biopolymers; book chapter discusses catalysts, volatile organic compounds, and additives in bio-based products, including their migration and safety
September 19, 2019
New BfR statement on polyamide oligomers
German risk assessment institute uses newly received toxicity data to establish group migration limit of 5mg/kg food for PA6 and PA66 oligomers
December 14, 2018
Oligomers in biodegradable food packaging
Study of non-volatile components of biodegradable polyester and polylactic acid blend identifies 37 different compounds including plasticizers and oligomers, some seen only in migration experiments
