Hybrid polymer composites are relatively new group of plastics that are rapidly developed. These materials combine high demands on the mechanical strength while keeping minimal density, thus generally opposing properties. Hybrid polymer composites have potentially very wide applicability, especially in aircraft or automotive industry where weight of the components is one of the critical parameters In the frame of this contribution the effect of individual components of multi-phase systems incorporated into thermoplastic matrix on resulting deformation processes was primarily analyzed. This study includes hybrid composites which are modified for the injection moulding technology. Test specimens for determining the mechanical properties (tensile, bending and Charpy impact) were made of nylon 66 with incorporated fibrous (glass fibres and carbon fibres) and particulate fillers (hollow glass beads / spheres).The final parameterization of individual process steps is very demanding by reason of the composite nature and hybrid structure.
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