Bianchi Sabrina, Pinna Michele, Bartoli Flavia, Minei Pierpaolo, Filidei Daniele, Coltelli Maria-Beatrice
SPIN-PET S.r.l., Viale R. Piaggio 32, 56025 Pontedera, Italy.
Department of Civil and Industrial Engineering, University of Pisa, 56122 Pisa, Italy.
Polymers (Basel). 2025 Mar 12;17(6):748. doi: 10.3390/polym17060748.
The significant waste generated by the fashion industry necessitates sustainable textile recycling strategies. Polyester, made from poly(ethylene terephthalate) (PET), is abundant in post-consumer textiles. Technologies have been developed to convert low-density garment waste into flakes, but the role of color sorting in achieving uniform aesthetics in injection-moldable plastics remains underexplored. This study compares materials extruded from dark color-sorted polyester garment flakes with those from light-color flakes in terms of processability in extrusion and injection molding. The properties examined include melt fluidity, injection molding shrinkage, and mechanical and thermal properties. Commercial chain extenders with anhydride, oxazoline, or epoxide reactive groups were added during extrusion. Interestingly, only dark-colored extruded pellets showed significant degradation, but all the chain extenders allowed melt fluidity to be controlled during reprocessing. The bisoxazoline-based additive was the most promising, due to the highly improved ductility of the samples, regardless of whether they were dark-colored or light-colored. The results indicate significant potential for the industrial recycling of post-consumer textiles and highlight the industrial feasibility of repurposing post-consumer polyester garments. This approach not only supports initiatives of circular economy but also offers a viable solution for managing textile waste, particularly in the fashion industry. Additionally, the suggested recycling route combats the production of microplastics.
时尚产业产生的大量废弃物需要可持续的纺织品回收策略。由聚对苯二甲酸乙二酯（PET）制成的聚酯在消费后的纺织品中含量丰富。已开发出将低密度服装废弃物转化为薄片的技术，但颜色分选在实现可注塑塑料均匀美观方面的作用仍未得到充分探索。本研究比较了从深色分选的聚酯服装薄片挤出的材料与从浅色薄片挤出的材料在挤出和注塑加工性能方面的差异。所考察的性能包括熔体流动性、注塑收缩率以及机械和热性能。在挤出过程中添加了具有酸酐、恶唑啉或环氧化物反应基团的商业扩链剂。有趣的是，只有深色挤出粒料显示出显著降解，但所有扩链剂都能在再加工过程中控制熔体流动性。基于双恶唑啉的添加剂最具前景，因为无论样品是深色还是浅色，其延展性都有显著提高。结果表明消费后纺织品工业回收具有巨大潜力，并突出了将消费后聚酯服装重新利用的工业可行性。这种方法不仅支持循环经济倡议，还为管理纺织废弃物提供了可行的解决方案，特别是在时尚产业中。此外，建议的回收路线可对抗微塑料的产生。
