Silano Vittorio, Barat Baviera José Manuel, Bolognesi Claudia, Chesson Andrew, Cocconcelli Pier Sandro, Crebelli Riccardo, Gott David Michael, Grob Konrad, Mortensen Alicja, Rivière Gilles, Steffensen Inger-Lise, Tlustos Christina, Van Loveren Henk, Vernis Laurence, Zorn Holger, Dudler Vincent, Milana Maria Rosaria, Papaspyrides Constantine, Tavares Poças Maria de Fátima, Lioupis Alexandros, Lampi Evgenia
EFSA J. 2019 Jul 26;17(7):e05772. doi: 10.2903/j.efsa.2019.5772. eCollection 2019 Jul.
The EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP) assessed the safety of the recycling process Poly Recycling (EU register number RECYC171). The input is hot caustic washed and dried poly(ethylene terephthalate) (PET) flakes originating from collected post-consumer PET containers, with no more than 5% PET from non-food consumer applications. The flakes are dried and crystallised in a reactor, then extruded into pellets which are further crystallised in a second reactor. Crystallised pellets are then preheated in a third reactor and fed to the solid-state polycondensation (SSP) reactor. Having examined the challenge test provided, the Panel concluded that the drying and crystallisation (step 2), extrusion and crystallisation (step 3) and SSP (step 4) are the critical steps that determine the decontamination efficiency of the process. The operating parameters to control the performance of these critical steps are temperature, gas flow and residence time for the drying and crystallisation step; temperature, pressure and residence time for the extrusion and crystallisation step as well as for the SSP step. It was demonstrated that this recycling process is able to ensure that the level of migration of potential unknown contaminants into food is below the conservatively modelled migration of 0.1 μg/kg food. Therefore, the Panel concluded that the recycled PET obtained from this process is not of safety concern, when used at up to 100% for the manufacture of materials and articles for contact with all types of foodstuffs for long-term storage at room temperature, with or without hotfill. Trays made of this recycled PET are not intended to be used in microwave and conventional ovens and such use is not covered by this evaluation.
欧洲食品安全局食品接触材料、酶和加工助剂专家委员会（CEP）评估了“聚回收”（欧盟注册号RECYC171）回收工艺的安全性。其输入物是来自收集的消费后聚对苯二甲酸乙二酯（PET）容器且经过热碱洗和干燥处理的PET薄片，其中非食品消费用途的PET含量不超过5%。这些薄片先在一个反应器中进行干燥和结晶，然后挤出成粒料，粒料再在第二个反应器中进一步结晶。结晶后的粒料接着在第三个反应器中预热，然后送入固态缩聚（SSP）反应器。在审查了所提供的挑战性试验后，专家委员会得出结论，干燥和结晶（步骤2）、挤出和结晶（步骤3）以及SSP（步骤4）是决定该工艺去污效率的关键步骤。控制这些关键步骤性能的操作参数为：干燥和结晶步骤的温度、气体流量和停留时间；挤出和结晶步骤以及SSP步骤的温度、压力和停留时间。结果表明，这种回收工艺能够确保潜在未知污染物向食品中的迁移水平低于保守模拟的0.1μg/kg食品的迁移量。因此，专家委员会得出结论，当将此工艺获得的再生PET以高达100%的比例用于制造与所有类型食品在室温下长期储存（无论是否热灌装）接触的材料和制品时，不存在安全问题。用这种再生PET制成的托盘不适用于微波炉和传统烤箱，本评估不涵盖此类使用情况。
