Abstract:

 Textile-reinforced composites are a leading trend in lightweight structure design. The demand for additional function integration in lightweight structures using multi-material design is growing rapidly. This article reports on the production of hybrid yarns made with the DREF-2000 friction spinning technique using carbon filament yarn (CFY) as the core component and diverse thermoplastic fibres, such as polypropylene (PP) and polyester (PET) fibres, as the sheath component. The yarns are to be used as a reinforcement and as a functional element suitable for textile reinforced thermoplastic composites. Different hybrid yarns were manufactured by varying the air suction pressure, spinning drum speed and distance between the spinning drums at a constant delivery and opening roller speed. The influence of the air suction pressure, spinning drum speed, distance between the spinning drums, sheath type and core sheath volume ratio on the properties of yarn tenacity and elongation was analysed and differentiated by a multi-factorial analysis of the individual variables (ANOVA).