Davis Nathan, Danes Jeffrey E, Vorst Keith
a Polymer and Food Protection Consortium , Iowa State University , Ames , IA , USA.
b Ideopak , Ames , IA , USA.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2017 Oct;34(10):1681-1689. doi: 10.1080/19440049.2017.1323277. Epub 2017 May 24.
Post-consumer recycled (PCR) plastic material is made by collecting used plastic products (e.g., bottles and other plastic packaging materials) and reprocessing them into solid-state pellets or flakes. Plastic recycling has positive environmental benefits, but may also carry potential drawbacks due to unwanted organic and inorganic contaminants. These contaminants can migrate into food packaging made from these recycled plastic materials. The purpose of this research was to identify economically viable real-time monitoring technologies that can be used during the conversion of virgin and recycled resin feedstocks (i.e., various blends of virgin pellets and recycled solid-state pellet or mechanically ground flake) to final articles to ensure the safety, quality and sustainability of packaging feedstocks. Baseline analysis (validation) of real-time technologies was conducted using industry-standard practices for polymer analysis. The data yielded supervised predictive models developed by training sessions completed in a controlled laboratory setting. This technology can be employed to evaluate compliance and aid converters in commodity sourcing of resin without exceeding regulatory thresholds. Furthermore, this technology allowed for real-time decision and diversion strategies during the conversion of resin and flake to final articles or products to minimise the negative impact on human health and environmental exposure.
消费后回收（PCR）塑料材料是通过收集废旧塑料制品（如瓶子和其他塑料包装材料）并将其重新加工成固态颗粒或薄片制成的。塑料回收具有积极的环境效益，但由于存在不需要的有机和无机污染物，也可能存在潜在缺点。这些污染物可能会迁移到由这些回收塑料材料制成的食品包装中。本研究的目的是确定经济可行的实时监测技术，这些技术可在将原始树脂原料和回收树脂原料（即原始颗粒与回收固态颗粒或机械研磨薄片的各种混合物）转化为最终制品的过程中使用，以确保包装原料的安全性、质量和可持续性。使用聚合物分析的行业标准做法对实时技术进行了基线分析（验证）。通过在受控实验室环境中完成的培训课程得出的数据生成了监督预测模型。该技术可用于评估合规性，并帮助加工商在不超过监管阈值的情况下进行树脂的商品采购。此外，该技术允许在树脂和薄片转化为最终制品或产品的过程中制定实时决策和转移策略，以尽量减少对人类健康和环境暴露的负面影响。
