Schmidt Jannick, Grau Laura, Auer Maximilian, Maletz Roman, Woidasky Jörg
Institut für Industrial Ecology, Hochschule Pforzheim, Tiefenbronner Straße 65, 75175 Pforzheim, Germany.
Institute of Waste Management and Circular Economy, Technische Universität Dresden, Pratzschwitzer Straße 15, 01796 Pirna, Germany.
Polymers (Basel). 2022 Apr 29;14(9):1825. doi: 10.3390/polym14091825.
Sorting multilayer packaging is still a major challenge in the recycling of post-consumer plastic waste. In a 2019 Germany-wide field study with 248 participants, lightweight packaging (LWP) was randomly selected and analyzed by infrared spectrometry to identify multilayer packaging in the LWP stream. Further investigations of the multilayer packaging using infrared spectrometry and microscopy were able to determine specific multilayer characteristics such as typical layer numbers, average layer thicknesses, the polymers of the outer and inner layers, and typical multilayer structures for specific packaged goods. This dataset shows that multilayer packaging is mainly selected according to the task to be fulfilled, with practically no concern for its end-of-life recycling properties. The speed of innovation in recycling processes does not keep up with packaging material innovations.
在消费后塑料废物回收中，多层包装的分类仍然是一项重大挑战。在2019年德国范围内有248名参与者的实地研究中，随机选取了轻质包装（LWP），并通过红外光谱法进行分析，以识别LWP流中的多层包装。使用红外光谱法和显微镜对多层包装进行的进一步研究能够确定特定的多层特征，如典型层数、平均层厚度、外层和内层的聚合物以及特定包装商品的典型多层结构。该数据集表明，多层包装主要是根据要完成的任务来选择的，几乎不考虑其报废回收特性。回收过程中的创新速度跟不上包装材料的创新。
