食品接触用再生聚丙烯：回收、改性技术及其安全性评估

刘宜奇; 李泽坤; 胡长鹰

doi:10.19554/j.cnki.1001-3563.2025.19.010

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包装工程（技术栏目） ›› 2025, Vol. 46 ›› Issue (19) : 82-92. DOI: 10.19554/j.cnki.1001-3563.2025.19.010

先进材料

食品接触用再生聚丙烯：回收、改性技术及其安全性评估

刘宜奇¹, 李泽坤², 胡长鹰^1*

作者信息 +

Recycled Polypropylene for Food Contact: Technologies for Recycling, Modification, and Safety Evaluation

LIU Yiqi¹, LI Zekun², HU Changying^1*

Author information +

文章历史 +

摘要

目的综述再生聚丙烯（Recycled polypropylene,rPP）的回收和改性技术,以及其用作食品接触材料时的安全性,为我国rPP应用于食品接触用材料提供参考。方法总结分析国内外对rPP回收技术、rPP用作食品接触材料时的改性方法及其安全性评估的最新研究。结果物理回收是解决废弃PP对环境影响的有效途径,但rPP在回收过程中会因热机械降解等因素导致性能下降,如分子量降低、黏度减少、力学性能变差等。通过添加加工助剂、纳米颗粒或玻璃纤维、聚烯烃共混物和生物基材料可显著改善rPP制品的性能,并减少有害物质的迁移,提高rPP在食品接触材料中的安全性。此外,化学回收和生物回收的发展潜力大。结论经过性能改性和制品配方优化,rPP有望进一步扩大其在安全性要求更高的食品接触材料领域的应用。

Abstract

The work aims to review the recycling and modification technologies of recycled polypropylene (rPP), as well as its safety when it is used as food contact material, so as to provide reference for the application of rPP in food contact materials in China. The latest research on rPP recycling technologies, modification methods for rPP used as food contact materials, and their safety evaluation in China and abroad was summarized and analyzed. Physical recycling is an effective approach to mitigate the environmental impact of waste PP. However, rPP experiences performance degradation during the recycling process due to factors such as thermomechanical degradation, resulting in reduced molecular weight, decreased viscosity, and poorer mechanical properties. Significantly, the performance of rPP products can be substantially improved by incorporating processing aids, nanoparticles or glass fibers, polyolefin blends, and bio-based materials. These modifications also help reduce the migration of harmful substances, thereby enhancing the safety of rPP for food contact applications. Furthermore, chemical recycling and biological recycling hold significant development potential. With performance modification and optimized product formulations, rPP holds promise for further expanding its application in the field of food contact materials, which has increasingly stringent safety requirements.

导出引用

刘宜奇, 李泽坤, 胡长鹰. 食品接触用再生聚丙烯：回收、改性技术及其安全性评估[J]. 包装工程（技术栏目）. 2025, 46(19): 82-92 https://doi.org/10.19554/j.cnki.1001-3563.2025.19.010

LIU Yiqi, LI Zekun, HU Changying. Recycled Polypropylene for Food Contact: Technologies for Recycling, Modification, and Safety Evaluation[J]. Packaging Engineering. 2025, 46(19): 82-92 https://doi.org/10.19554/j.cnki.1001-3563.2025.19.010

中图分类号： TS206.4

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