Vozikis Lazaros, Mani Skander, Maazouz Abderrahim, Lamnawar Khalid
CNRS, UMR 5223, Ingénierie des Matériaux Polymères, INSA Lyon, Université de Lyon, F-69621 Villeurbanne, France.
CT-IPC, 2 Rue Pierre et Marie Curie, F-01100 Bellignat, France.
Polymers (Basel). 2024 Dec 29;17(1):57. doi: 10.3390/polym17010057.
The present study introduces an innovative blown coextrusion die technology designed to address a critical gap in the production of multilayer films. Unlike conventional systems, this novel die allows for the creation of films with a high number of layers, ensuring layer integrity even in the micro-nano scale. A key advancement of this die is its ability to increase the number of layers without extending the residence time since it does not require an additional multiplier element. The risk of thermal degradation can, thus be, minimized. The die can easily be combined with existing cast coextrusion technologies, making it very versatile. Stability maps were developed to define processability and, in association with rheological analysis, optimal processing windows were determined. This study highlights the potential of enhancing material efficiency by increasing the number of layers while reducing the need for high percentages of EVOH. The produced multilayer films exhibited strong layer adhesion without the use of tie layers, thus improving recyclability and supporting sustainability goals.
本研究介绍了一种创新的吹塑共挤模头技术，旨在解决多层薄膜生产中的一个关键空白。与传统系统不同，这种新型模头能够制造具有大量层数的薄膜，即使在微纳尺度下也能确保层的完整性。该模头的一项关键进步在于，它能够在不延长停留时间的情况下增加层数，因为它不需要额外的倍增元件。因此，热降解的风险可以降至最低。该模头可以轻松地与现有的流延共挤技术相结合，使其具有很强的通用性。通过开发稳定性图来定义可加工性，并结合流变学分析，确定了最佳加工窗口。本研究强调了通过增加层数同时减少对高比例乙烯-乙烯醇共聚物（EVOH）的需求来提高材料效率的潜力。所生产的多层薄膜在不使用粘结层的情况下表现出很强的层间附着力，从而提高了可回收性并支持可持续发展目标。
