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Updated: Jun 14, 2025

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来自高密度聚乙烯和软木 kraft 纸的热成型产品
Eric Desnoes1, Pascale Deshaies1, Benoit Bideau1
1Innofibre Research Group, CEGEP de Trois-Rivières, 3351 Boulevard des Forges, Trois-Rivières, Québec G9A5H7, Canada.
概括
这项研究将高密度聚乙烯 (HDPE) 废弃物用于成型的纸食品托盘. 回收塑料增强了对水和油脂的抗性,但降低了可回收性,促进了循环经济.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物工程 聚合物工程
- 可持续制造 可持续制造 可持续制造
背景情况:
- 塑料回收和废物最小化对于循环经济至关重要.
- 价值化工艺废弃物,如高密度聚乙烯 (HDPE),可以创建增值产品.
- 模塑纸热成型提供了一个可持续的制造路线.
研究的目的:
- 为了生产食品托盘,使用模塑纸热成型,将回收的HDPE废料纳入.
- 评估由此产生的复合材料的物理和机械性能.
- 评估这种方法在减少废物和利用资源方面的潜力.
主要方法:
- 使用聚乙烯醇 (PVA) 在北方漂白软木 Kraft 纸 (NBSKP) 泥中分散HDPE废弃物.
- 通过成型纸热成型生产食品托盘.
- 评估空气透性,耐水/油脂性 (科布试验),表面疏水性 (接触角),机械性质 (斯模量,湿强度) 和可反性.
主要成果:
- 增加HDPE含量大大降低了空气透率,达到2.4毫升/分钟.
- 水和油脂的持久性性能得到了改善,Cobb值分别为10.9g/m2和13.18g/m2.
- 观察到疏水表面 (接触角度>90°) 和增加湿强度 (81%),以及由于塑性变形而降低的模量 (17%). SEM证实了HDPE的化和结合.
结论:
- 用HDPE出产的成型纸热成型成功创建了具有增强屏障性能的食品托盘.
- 复合材料表现出更好的防水和防脂性能,增加了湿强度.
- 在促进循环经济的同时,高HDPE含量会对可反性产生负面影响,需要进一步优化.
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