Natural-Fibre-Mat-Reinforced Thermoplastic Composites based on Flax Fibres and Polypropylene

Natural-fibre-mat-reinforced thermoplastics (NMTs) based on flax fibres and a polypropylene (PP) matrix were manufactured using a film-stacking method. The influence of fibre content on stiffness and strength is reported and compared with data for glass-matreinforced-thermoplastics (GMTs), including the influence of improved fibre/matrix adhesion as a result of the use of maleic-anhydride grafted PP. Additionally, unidirectional and random-flax-mat composites based on epoxy resin were manufactured as reference materials. Results indicated that NMTs are of interest for low cost engineering applications, especially when a high stiffness per unit weight is desirable.