New high-density polyethylene (HDPE) manufactured from different percentage of post-consumer recycled HDPE milk bottles was studied through two static and dynamic migration tests using saliva simulant to assess the potential hazard to children. Sixty-nine compounds were identified, including several additives used in PE synthesis such as alkanes, alkenes, antioxidants and plasticizers as well as non-intentionally added substances (NIAS) like degradation products such as 2,6-di-tert-butyl-1,4-benzoquinone, 2,4-di-tert-butylphenol, phenol, 2,5-bis(1,1-dimethylethyl)-, 3,5-di-tert-butyl-4-hydroxybenzaldehyde, and 3,5-di-tert-butyl-4-hydroxyacetophenone, or various residues from flavoring agents, cleaning products and essential oils. Some of these compounds as the isomers p and o t-butylcyclohexyl acetate, 3-Octanol, 3,7-dimethyl- and thujanol acetate (3-) pose a potential risk to children, as their concentrations exceed the recommended Cramer values for high percentages of recycling. This suggests improving recycling processes by incorporating advanced cleaning to remove residual products and contaminants.

中文翻译：

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为儿童玩具设计安全的再生高密度聚乙烯 (HDPE)


通过使用唾液模拟物的两项静态和动态迁移测试，研究了由不同比例的消费后回收 HDPE 奶瓶制成的新型高密度聚乙烯 (HDPE)，以评估对儿童的潜在危害。鉴定出 69 种化合物，包括用于 PE 合成的多种添加剂，如烷烃、烯烃、抗氧化剂和增塑剂，以及非有意添加物质 (NIAS)，如降解产物，如 2,6-二叔丁基-1 ,4-苯醌、2,4-二叔丁基苯酚、苯酚、2,5-双(1,1-二甲基乙基)-、3,5-二叔丁基-4-羟基苯甲醛、3,5-二叔丁基-4-羟基苯乙酮，或调味剂、清洁产品和精油的各种残留物。其中一些化合物，如对和邻叔丁基环己基乙酸酯、3-辛醇、3,7-二甲基-和侧柏酚乙酸酯 (3-) 异构体，对儿童构成潜在风险，因为它们的浓度超过建议的高百分比克莱默值的回收。这表明通过采用先进的清洁技术来去除残留产品和污染物来改进回收过程。