A Study on Weave-ability of GF/PP Commingled Hybrid Yarns for High Density 3D Preforms

摘要

Thermoplastic matrix composites have the advantages of shorter cycle time and better recycling in comparison with the market-dominating thermoset matrix composites. The well known problem of thermoplastic impregnation, which is caused by the high viscosity, can be solved through the integration of solid state thermoplastic matrix during yarn and preform production. Commingled yarns are often used for thermoplastic composites however there are challenges concerning the preform manufacturing. Twisting creates a compact reinforcement structure and enables manufacturing of denser preforms with less risk of production stops and failures. In this study effect of twisting on the mechanical properties GF/PP commingled hybrid yarns and their UD composites are investigated. Furthermore, there is a direct relation between the crimp of warp yarns and weft density. Therefore, effect of various production parameters of weaving on the preform and composite properties are analysed.