Scientific Opinion on the safety evaluation of the process “Holfeld Diamat” used to recycle post-consumer PET into food contact materials

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Article
Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids
EFSA Journal
EFSA Journal 2013;11(3):3118 [15 pp.].
Possible conflict of interest
One member of the Panel did not participate in the discussion on the subject referred to above because of potential conflicts of interest identified in accordance with the EFSA policy on declarations of interests.
doi
10.2903/j.efsa.2013.3118
Panel members at the time of adoption
Ulla Beckman Sundh, Mona-Lise Binderup, Claudia Bolognesi, Leon Brimer, Laurence Castle, Alessandro Di Domenico, Karl-Heinz Engel, Roland Franz, Nathalie Gontard, Rainer Gürtler, Trine Husøy, Klaus-Dieter Jany, Martine Kolf-Clauw, Catherine Leclercq, Wim Mennes, Maria Rosaria Milana, Fatima Poças, Iona Pratt, Kettil Svensson, Fidel Toldrá and Detlef Wölfle.
Acknowledgements

The Panel wishes to thank the members of the Working Group on Recycling processes: Laurence Castle, Vincent Dudler, Nathalie Gontard, Eugenia Lampi, Maria Rosaria Milana, Cristina Nerin, Constantine Papaspyrides and Karla Pfaff for the preparatory work on this scientific opinion.

Contact
Type
Opinion of the Scientific Committee/Scientific Panel
On request from
the Food Safety Authority of Ireland
Question Number
EFSA-Q-2011-00936
Adopted
20 February 2013
Published in the EFSA Journal
5 March 2013
Affiliation
European Food Safety Authority (EFSA), Parma, Italy
Note
Abstract

This scientific opinion of the EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids deals with the safety evaluation of the recycling process Holfeld Diamat (EC register number RECYC076) which is based on the Diamat ® technology. The input of the process is washed and dried PET flakes originating from collected post-consumer PET containers, mainly bottles, containing no more than 5 % of PET from non-food consumer applications. Through this process, post-consumer washed and dried PET flakes are mixed up to 50 % with virgin PET flakes before being heated in a crystallisation reactor (step 2) and extruded under vacuum into sheets (step 3). After having examined the challenge tests provided, the Panel concluded that the decontamination in the two consecutive extruders step 3 is the critical step for the decontamination efficiency of the process. The operating parameters to control its performance are well defined and are the temperature, the pressure and the residence time. The operating parameters of these steps in the process are at least as severe as those obtained from the challenge test. Under these conditions, it was demonstrated that the recycling process is able to ensure that the level of migration of potential unknown contaminants into food is below a conservatively modelled migration of 0.15 μg/kg food derived from the exposure scenario for toddlers. Therefore, the recycled PET obtained from the process Holfeld Diamat intended for the manufacture of recycled thermoformed trays and containers made with up to 50 % recycled post-consumer PET and intended for contact for long term storage at room temperature with all types of foodstuffs except packaged water is not considered of safety concern.

Keywords
Food contact materials; Plastic; Poly(ethylene terephthalate) PET; Recycling; Process; Holfeld Diamat; Safety evaluation
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Number of Pages
15