Abstract With the increased demand and usage of carbon fibre reinforced composites (CFRP), effective methods to reuse waste carbon fibres (CF), which are recoverable either from manufacturing waste or from end-of-life components, are attracting growing attention. In this paper, the development of innovative core-sheath hybrid yarn structures consisting of staple CF and polyamide 6 (PA 6) fibres of 60 mm lengths using a DREF-3000 friction spinning machine with varying machine parameters, such as core to sheath ratio and suction air pressure, is described. Furthermore, uni-directional (UD) CFRP were manufactured based on the developed hybrid yarns, and the influence of the processing parameters on tensile properties and CF content of the composites was analysed. UD composites manufactured from the developed hybrid yarns possess approximately at least 86% of the tensile strength and Young's modulus of composites produced from virgin CF filament yarn.

中文翻译：

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由碳纤维短纤维和聚酰胺 6 纤维组成的创新混合纱线结构开发的碳纤维增强热塑性复合材料

摘要 随着碳纤维增强复合材料 (CFRP) 需求和使用的增加，回收废碳纤维 (CF) 的有效方法越来越受到关注，这些废碳纤维可以从制造废物或报废部件中回收。在本文中，使用 DREF-3000 摩擦纺纱机开发了由 CF 短纤维和 60 毫米长度的聚酰胺 6 (PA 6) 纤维组成的创新型芯鞘混合纱线结构，该机器具有不同的机器参数，例如芯鞘比和吸入空气压力，描述。此外，基于开发的混合纱线制造了单向 (UD) CFRP，并分析了加工参数对复合材料的拉伸性能和 CF 含量的影响。