使用溶剂向回收和沉 (STRAP) 来生产高质量的聚乙烯 (PE) 薄膜
Elizaveta Radkevich1, Charles Granger1, Kevin Nelson2
1Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
Waste management (New York, N.Y.)
|February 15, 2026
概括
用溶剂准的回收和沉 (STRAPTM) 工艺有效地回收消费后废弃的收缩,产生透明的再生聚乙烯 (rPE) 薄膜. 这种创新的回收方法可以减少废物,并与原始塑料生产相比,为环境带来好处.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 消费后废弃物 (PCW) 收缩纸含有具有挑战性的污染物,如油墨,粘合剂和纸张.
- 这种混合污染物塑料废物的有效回收仍然是行业面临的重大挑战.
- 目前的回收方法往往难以实现复杂原料的高纯度和经济可行性.
研究的目的:
- 为了证明以溶剂为目标的回收和沉 (STRAPTM) 工艺用于回收PCW收缩包装的有效性.
- 为了生产高质量的回收聚乙烯 (rPE) 薄膜,不含视觉污染物.
- 评估大规模应用STRAPTM工艺的技术经济可行性和环境影响.
主要方法:
- 将STRAPTM工艺应用于含有油墨,粘合剂和纸张的PCW收缩包装.
- 由此产生的回收聚乙烯 (rPE) 造薄膜的特征,视觉纯度和灰含量.
- 进行技术经济分析 (TEA) 以确定各种rPE销售价格的内部收益率 (IRR).
- 进行生命周期评估 (LCA),将全球变暖潜力 (GWP) 与初始低密度聚乙烯 (LDPE) 进行比较.
主要成果:
- 从PCW收缩制成透明rPE造薄膜的生产,免受纸张或油墨的视觉污染.
- 使用STRAPTM工艺将灰含量从0.96%减至0.24%显著降低.
- 技术经济分析表明,在可行的rPE价格下,具有吸引力的IRR (高达16.2%) 的潜力.
- 生命周期评估显示,与原始LDPE生产相比,全球变暖潜力减少了64%.
结论:
- STRAPTM工艺是一种可行且可扩展的技术,用于回收含有不溶性杂质的消费后收缩.
- 这种方法可以生产高纯度的回收聚乙烯,解决塑料废物管理的关键需求.
- 该过程提供了显著的环境效益,包括减少碳足迹,并证明了工业实施的经济潜力.
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